SMOKING SUBSTITUTE CONSUMABLE

Abstract

The present disclosure relates to smoking substitute consumables, including an aerosol-forming article comprising an aerosol-forming substrate and a terminal filter element at a downstream axial end of the article/consumable. The terminal filter element may comprise a hollow bore extending from an upstream axial end of the terminal filter element to a downstream axial end of the terminal filter element. The hollow bore may be off-set from the axial centre of the terminal filter element.

Claims

1. An aerosol-forming article comprising an aerosol-forming substrate and a terminal filter element at a downstream axial end of the article/consumable wherein the terminal filter element comprises a hollow bore extending from an upstream axial end of the terminal filter element to a downstream axial end of the terminal filter element wherein the hollow bore is off-set from the axial centre of the terminal filter element.

2. An article according to claim 1, wherein the aerosol-forming article is a heat-not-burn (HNB) consumable.

3. An article according to claim 1, further comprising an upstream filter element provided upstream of the terminal filter element.

4. An article according to claim 3 wherein the upstream filter element is a hollow bore filter element comprising an axial bore.

5. An article according to claim 3, wherein the diameter of the axial bore in the upstream filter element is greater than the diameter of the offset bore in the terminal filter element.

6. An article according to claim 3, wherein the porosity of the upstream filter element is less than the porosity of the terminal filter element.

7. An article according to claim 3, wherein the upstream and terminal filter elements are spaced apart by a cooing element and/or a spacer element.

8. A system comprising: a smoking substitute article having a downstream axial end, the smoking substitute article comprising: an aerosol-forming substrate; and a terminal filter element having an upstream axial end and a downstream axial end, and a hollow bore extending from the upstream axial end of the terminal filter element to the downstream axial end of the terminal filter element, wherein the hollow bore is off-set from an axial centre of the terminal filter element; and a device comprising a heating element.

9. A system according to claim 8, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

10. A method of using the system according to claim 8, the method comprising: inserting the article into the device; and heating the article using the heating element.

11. A method according to claim 10, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

12. A Heat-Not-Burn (HNB) consumable comprising an aerosol-forming substrate and a flow restrictor element downstream of the aerosol-forming substrate.

13. A HNB consumable according to claim 12, further comprising in axial flow arrangement, an upstream filter element, a spacer element, and a terminal filter element, wherein at least one of the filter elements is a hollow bore filter element and wherein the flow restrictor element is provided upstream of the terminal filter element and downstream of the aerosol-forming substrate.

14. An aerosol-forming article comprising, in axial flow arrangement, an aerosol-forming substrate, an upstream filter element, a spacer element and a terminal filter element, wherein at least one of the filter elements is a hollow bore filter element and wherein the article further comprises a flow restrictor element upstream of the terminal filter element and downstream of the aerosol-forming substrate.

15. A consumable/article according to claim 14 wherein the flow restrictor element comprises a disc or rod having at least one axial perforation or channel.

16. A consumable/article according to claim 15 wherein the flow restrictor element has a single perforation or channel at its axial centre having a diameter of between 0.5 and 1.5 mm.

17. A consumable/article according to claim 14 wherein the flow restrictor element is formed of a vapour-impermeable material.

18. A consumable/article according to claim 14 wherein the flow restrictor element is formed of extruded tobacco.

19. A consumable/article according to claim 14 wherein the flow restrictor element is provided upstream of the spacer element.

20. A consumable/article according to claim 19 wherein the restrictor element is interposed between the upstream filter element and the spacer element.

21. A consumable/article according to claim 14 wherein the upstream filter element is a hollow bore filter having a bore diameter greater than 1.5 mm.

22. A consumable/article according to claim 14 wherein both the upstream and terminal filter element are hollow bore filter elements.

23. A system comprising: a HNB consumable or smoking substitute article comprising, in axial flow arrangement: an aerosol-forming substrate, a flow restrictor element downstream of the aerosol-forming substrate; an upstream filter element, a spacer element; and a terminal filter element downstream of the flow restrictor element and downstream of the aerosol-forming substrate, wherein at least one of the upstream filter element and the terminal filter element is a hollow bore filter element; and a device comprising a heating element.

24. A system according to claim 23 wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

25. A method of using the system according to claim 23, the method comprising: inserting the consumable/article into the device; and heating the consumable/article using the heating element.

26. A method according to claim 25, further comprising inserting the consumable/article into a cavity within a main body of the device and penetrating the consumable/article with the heating element upon insertion of the consumable/article.

27. An aerosol-forming article comprising a cooling element comprising a phase change material.

28. An article according to claim 27, wherein the article is a heat not burn (HNB) consumable.

29. An article according to claim 27, wherein the phase change material is an organic phase change material.

30. An article according to claim 29, wherein the phase change material is eicosane.

31. An article according to claim 27, wherein the cooling element comprises a plurality of phase change beads each comprising a shell enclosing a core formed of the phase change material.

32. An article according to claim 27, wherein the cooling element comprises a cylindrical body and the phase change material/beads are dispersed within the body.

33. An article according to claim 32, wherein the cylindrical body comprises an axial bore extending therethrough.

34. An article according to claim 32, wherein the cylindrical body comprises a matrix of fibrous, granular, sheet or solid plastics material.

35. An article according to claim 34, wherein the plastics material comprises one or more of viscose, cellulose, polyester, polyacrylonitrile, polylactic acid, polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET).

36. An article according to claim 35, wherein the fibrous plastics material is selected from viscose, cellulose, polyester, acrylic or polylactic acid fibres.

37. An article according to claim 27, wherein the cooling element is formed of Outlast® viscose fibres.

38. An article according to claim 27, wherein the cooling element is sandwiched between a terminal filter element and an upstream filter element downstream of an aerosol-forming substrate.

39. A system comprising a smoking substitute article according to claim 27 and a device comprising a heating element.

40. A system according to claim 39, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

41. A method of using the system according to claim 39, the method comprising: inserting the article into the device; and heating the article using the heating element.

42. A method according to claim 41, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

43. An aerosol-forming article comprising an aerosol-forming substrate wherein the article further comprises: a terminal filter element at the axial downstream of end of the article, the terminal filter element being a hollow bore filter element; and one or more of an upstream filter element, an upstream aerosol-cooling element and an upstream spacer element.

44. An article according to claim 43, wherein the internal diameter of the bore in the terminal filter element is between 1 and 3 mm.

45. An article according to claim 43, comprising the upstream filter element wherein the upstream filter element is a hollow bore filter element.

46. An article according to claim 45, wherein the internal diameter of the bore in the upstream filter element is greater than the internal diameter of the bore in the terminal filter element.

47. An article according to claim 45, wherein the density of the filter material forming the terminal filter element is greater than the density of the filter material forming the upstream filter element.

48. An article according to claim 45, wherein the upstream filter element and terminal filter element are axially spaced.

49. An article according to claim 48, further comprising the aerosol-cooling element wherein the upstream filter element and terminal filter element are spaced by the aerosol-cooling element.

50. An article according to claim 48, further comprising the spacer element wherein the upstream filter element and terminal filter element are spaced by the spacer element.

51. An article according to claim 45, wherein the spacer element is a cardboard tube.

52. An article according to claim 45, wherein the aerosol-cooling element comprises a crimped/gathered sheet of plastics material.

53. A system comprising a smoking substitute article according to claim 45, and a device comprising a heating element.

54. A system according to claim 53, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

55. A method of using the system according to claim 53, the method comprising: inserting the article into the device; and heating the article using the heating element.

56. A method according to claim 55, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

57. An aerosol-forming article comprising an aerosol-forming substrate wherein the aerosol-forming substrate comprises a first, upstream portion of aerosol-forming material and a second, downstream portion of aerosol-forming material wherein the first and second portions of aerosol-forming material are axially spaced by a cavity housing a vapour modifier.

58. An aerosol-forming article according to claim 57 wherein the first portion of aerosol-forming material and the second portion of aerosol-forming material are both formed of a first aerosol-forming material.

59. An aerosol-forming article according to claim 58 wherein the vapour modifier comprises a second aerosol-forming material.

60. An aerosol-forming article according to claim 059 wherein the second aerosol-forming material is extruded tobacco.

61. An aerosol-forming article according to claim 60 wherein the second aerosol-forming material is extruded tobacco chips/pellets/granules.

62. An aerosol-forming article according to any one of claims 58 to 61 wherein the first aerosol-forming material comprises one or more of tobacco, tobacco derivatives, expanded tobacco, shredded tobacco and/or reconstituted tobacco.

63. An aerosol-forming article according to any one of the preceding claims wherein the vapour modifier is an additive carrier.

64. An aerosol-forming article according to claim 063 wherein the additive carrier is a crushable or meltable capsule.

65. An aerosol-forming article according to claim 063 or 64 wherein the additive carrier contains a humectant or a flavourant.

66. A smoking substitute system comprising an article according to any one of the preceding claims and a device comprising a heating element.

67. A system according to claim 066 wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

68. A method of using the system according to claim 066 or 67, the method comprising: inserting the article into the device; and heating the article using the heating element.

69. A method according to claim 068 comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

70. A filter element for an aerosol-forming article, the filter element comprising a bundle of filter tows with a bore extending longitudinally therethrough, at least a portion of the bore having a non-circular transverse cross-section.

71. A filter element according to claim 70, wherein the transverse cross-section of the at least a portion of the bore comprises a central portion and a plurality of lobes projecting outwardly from the central portion.

72. A filter element according to claim 70, wherein the transverse cross-section of at least a portion of the bore is any one of a square, triangle, heart shape, star shape or asterisk shape.

73. A filter element according to claim 70, wherein the transverse cross-sectional area of the bore is substantially uniform for the entire axial length of the bore.

74. A filter element according to claim 70, wherein the shape of the transverse cross-section of the bore is substantially uniform for the entire length of the bore.

75. A filter element according to claim 70, comprising a plurality of bores, at least a portion of each of the plurality of bores having a non-circular transverse cross-section.

76. An aerosol-forming article comprising an aerosol-forming substrate and a filter element according to claim 70, downstream of the aerosol-forming substrate.

77. An aerosol-forming article according to claim 76, wherein the filter element is a terminal filter element located at a downstream axial end of the aerosol-forming article.

78. An aerosol-forming article according to claim 76, that is a heat-not-burn (HNB) consumable.

79. A system comprising an aerosol-forming article according to claim 70, and a device comprising a heating element.

80. A system according to claim 79, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

81. A method of using the system according to claim 79, the method comprising: inserting the article into the device; and heating the article using the heating element.

82. A method according to claim 81, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

83. An aerosol-forming article comprising an aerosol-forming substrate wherein the aerosol-forming substrate comprises at least a first aerosol-forming material and a second aerosol forming material wherein the first and second aerosol-forming materials are axially and/or radially segregated within the aerosol-forming substrate.

84. An aerosol-forming article according to claim 83, wherein the aerosol-forming materials are axially segregated and the aerosol-forming substrate comprises at least a first rod- or tube-shaped portion and a second rod- or tube-shaped portion.

85. An aerosol-forming article according to claim 84, wherein the first and second rod/tube portions are axially adjacent one another within the substrate.

86. An aerosol-forming article according to claim 83, wherein the aerosol-forming materials are radially segregated and the aerosol-forming substrate comprises at least a first, radially outer rod- or tube-shaped portion (formed of the first aerosol-forming material) and a second, radially inner tube-shaped portion (formed of the second aerosol-forming material).

87. An aerosol-forming article according to claim 86, wherein the first and second rod/tube portions are radially adjacent one another.

88. An aerosol-forming article according to claim 83, wherein one of the first and second aerosol-forming materials comprises extruded tobacco.

89. An aerosol-forming article according to claim 88, wherein the extruded tobacco is in the form of a rod- or tube-shaped extrudate or chips/granules/pellets.

90. A smoking substitute article according to claim 83, wherein one of the first and second aerosol-forming materials comprises reconstituted tobacco and the other comprises extruded tobacco.

91. A smoking substitute system comprising an article according to claim 83, and a device comprising at least one heating element.

92. A system according to claim 91, wherein the device comprises a first heating element for heating the first aerosol-forming material within the substrate and a second heating element for heating the second aerosol forming material.

93. A system according to claim 92, wherein the first and second heating elements are separately controllable.

94. A method of using the system according to claim 91, the method comprising: inserting the article into the device; and heating the article using the heating element(s).

95. A method according to claim 94, comprising heating the first aerosol-forming material in the aerosol-forming substrate using a the first heating element and heating the second aerosol-forming material in the aerosol-forming substrate using the second heating element.

96. A method according to claim 95, comprising heating the first aerosol-forming material at a different rate and/or temperature than the second aerosol-forming material.

97. An aerosol-forming article comprising an aerosol-forming substrate and a terminal filter element, wherein the terminal filter element comprises an upstream filter portion and an axially adjacent downstream filter portion, and wherein one of the upstream and downstream filter portions is a hollow bore filter element and the other is a solid filter element.

98. An aerosol-forming article according to claim 97, wherein the upstream filter portion is the solid filter element, and the downstream filter portion is the hollow bore filter element.

99. An aerosol-forming article according to claim 97, wherein the terminal filter element has an axial length of between 11 mm and 13 mm.

100. An aerosol-forming article according to claim 97, wherein the upstream filter portion and the downstream filter portion have substantially the same axial length.

101. An aerosol-forming article according to claim 100, wherein the axial length of each of the upstream and downstream filter portions is around 6 mm.

102. An aerosol-forming article according to claim 97, wherein the upstream and downstream filter portions are joined by way of a plug wrap at least partly circumscribing the upstream and downstream filter portions.

103. An aerosol-forming article according to claim 97, wherein the filter portion that is the solid filter element comprises a flavourant.

104. An aerosol-forming article according to claim 97, further comprising a hollow bore upstream filter element located between the aerosol-forming substrate and the terminal filter element.

105. An aerosol-forming article according to claim 97, wherein the article is a heat not burn (HNB) consumable.

106. A method of forming an aerosol-forming article, the method comprising: joining a first filter portion to a second filter portion to form a terminal filter element; and combining the terminal filter element with an aerosol-forming substrate to form the aerosol-forming article.

107. A method according to claim 106, wherein the first filter portion is a hollow bore filter element and the second filter portion is a solid filter element.

108. A method according to claim 106, wherein the first and second filter portions are joined by a plug wrap.

109. A method according to claim 106, wherein the combined axial length of the first and second filter portions is around 12 mm and the step of combining the terminal filter element with the substrate is performed using a combining machine configured for combining terminal filter elements having an axial length of 12 mm.

110. A system comprising a smoking substitute article according to claim 97, and a device comprising a heating element.

111. A system according to claim 110, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

112. A method of using the system according to claim 110, the method comprising: inserting the article into the device; and heating the article using the heating element.

113. A method according to claim 112 comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

114. An aerosol-forming article comprising an aerosol-forming substrate at least partly comprising a rod of extruded plant material wherein the article further comprises a terminal filter element at the downstream axial end and an upstream filter element upstream and axially spaced from the terminal filter element.

115. An article according to claim 114, wherein the article is a heat not burn (HNB) consumable.

116. An article according to claim 114, wherein the rod of extruded plant material has an axial bore adapted to receive an external heating element.

117. An article according to claim 114, wherein the aerosol-forming substrate comprises a rod of extruded tobacco.

118. An article according to claim 114, wherein the aerosol-forming substrate further comprises one or more additives selected from humectants, fillers, solvents, flavourants, and binders.

119. An article according to claim 114, wherein the upstream filter element and terminal filter element are axially spaced by a cooling element or a spacer.

120. An article according to claim 114, wherein the upstream filter element is axially adjacent the aerosol-forming substrate.

121. An article according to claim 114, wherein the filter element and/or the terminal filter element is/are a hollow bore element.

122. An article according to claim 121, wherein both the upstream and terminal filer elements are hollow bore filter elements.

123. A smoking substitute system comprising an article according to an claim 114, and a device comprising a heating element.

124. A system according to claim 123, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

125. A method of using the system according to claim 123, the method comprising: inserting the article into the device; and heating the article using the heating element.

126. A heat not burn consumable comprising an aerosol-forming substrate and a terminal filter element, wherein the axial length of the terminal filter element is adjustable.

127. A consumable according to claim 126, wherein the terminal filter element comprises a plurality of filter portions in axial abutment with one another and wherein one or more of the filter portions is/are removable from the consumable to adjust the axial length of the terminal filter element.

128. A consumable according to claim 126, wherein the terminal filter element comprises a hollow bore filter portion.

129. A consumable according to claim 128, wherein the hollow bore filter portion is upstream from the downstream axial end of the consumable.

130. A consumable according to claim 129, further comprising a solid filter portion at the axial downstream end of the consumable.

131. A consumable according to claim 127, wherein the terminal filter element is circumscribed by a tipping paper and wherein the tipping paper comprises a region of weakness aligned with a join between two filter portions.

132. A consumable according to claim 131, wherein the region of weakness comprises an array of perforations in the tipping paper.

133. An aerosol-forming article comprising an aerosol-forming substrate and a terminal filter element wherein the axial length of the terminal filter element is adjustable and wherein the terminal filter element comprises a hollow bore filter portion and a solid filter portion.

134. An article according to claim 133, wherein the terminal filter element is circumscribed by a tipping paper and wherein the tipping paper comprises a region of weakness aligned with a join between the two filter portions.

135. An article according to claim 134, wherein the region of weakness comprises an array of perforations in the tipping paper.

136. A system comprising a consumable or an article according to claim 126, and a device comprising a heating element.

137. A system according to claim 136, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

138. A method of using the system according to claim 136, the method comprising: inserting the consumable/article into the device; and heating the consumable/article using the heating element.

139. A method according to claim 135, comprising inserting the consumable/article into a cavity within a main body of the device and penetrating the consumable/article with the heating element upon insertion of the consumable.

140. A method according to claim 135, comprising reducing the axial length of the terminal filter element.

141. An aerosol-forming article comprising an aerosol-forming substrate and a plurality of filter elements having different axial lengths.

142. An article according to claim 141, wherein the article is a heat-not-burn (HNB) consumable.

143. An article according to claim 141, comprising a terminal filter element at the downstream/mouth end of the article and an upstream filter element upstream of the terminal filter element.

144. An article according to claim 143, wherein the axial length of the terminal filter element is greater than the axial length of the upstream filter element.

145. An article according to claim 143, wherein the axial length of the terminal filter element is 2 mm or more greater than the axial length of the upstream filter element.

146. An article according to claim 143, wherein the terminal filter element is a hollow bore filter element.

147. An article according to claim 146, wherein the upstream filter element is a hollow bore filter element.

148. An article according to claim 147, wherein the terminal filter element has an axial bore having a smaller diameter than an axial bore in the upstream filter element.

149. An article according to claim 143, wherein the upstream filter element has a greater porosity than the terminal filter element.

150. An article according to claim 143, wherein the upstream filter element and terminal filter element are spaced by an aerosol-cooling element and/or a spacer element.

151. A system comprising a smoking substitute article according to claim 143, and a device comprising a heating element.

152. A system according to claim 151, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

153. A method of using the system according to claim 151, the method comprising: inserting the article into the device; and heating the article using the heating element.

154. A method according to claim 153, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

155. An aerosol-forming article comprising an aerosol-forming substrate and a plurality of hollow bore filter elements having different internal bore diameters.

156. An article according to claim 155, wherein the article is a heat-not-burn (HNB) consumable.

157. An article according to claim 155, comprising a terminal hollow bore filter element at the downstream/mouth end of the article and an upstream hollow bore filter element upstream of the terminal filter element.

158. An article according to claim 157, wherein the terminal hollow bore filter element has an axial bore having a smaller diameter than an axial bore in the upstream hollow bore filter element.

159. An article according to claim 158, wherein the diameter of the axial bore in the upstream hollow bore filter element is at least 1 mm greater than the diameter of the axial bore in the terminal filter element.

160. An article according to claim 157, wherein the axial length of the terminal hollow bore filter element is greater than the axial length of the upstream hollow bore filter element.

161. An article according to claim 160, wherein the axial length of the terminal hollow bore filter element is 2 mm or more greater than the axial length of the upstream hollow bore filter element.

162. An article according to claim 157, wherein the upstream hollow bore filter element has a greater porosity than the terminal hollow bore filter element.

163. An article according to claim 157, wherein the upstream hollow bore filter element and terminal hollow bore filter element are spaced by an aerosol-cooling element and/or a spacer element.

164. A system comprising a smoking substitute article according to claim 157, and a device comprising a heating element.

165. A system according to claim 164, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

166. A system according to claim 164, comprising a rod-shaped heater having an external diameter wherein the internal diameter of the bore of the upstream hollow bore filter element is greater than the external diameter of the rod-shaped heater.

167. A method of using the system according to claim 164, the method comprising: inserting the article into the device; and heating the article using the heating element.

168. A method according to claim 167, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

169. An aerosol-forming article comprising an aerosol-forming substrate and a plurality of filter elements wherein at least two of the filter elements have different hardness from one another.

170. An article according to claim 169, wherein the article is a heat-not-burn (HNB) consumable.

171. An article according to claim 169, comprising a terminal filter element at the downstream/mouth end of the article and an upstream filter element upstream of the terminal filter element.

172. An article according to claim 171, wherein the hardness of the terminal filter element is greater than the hardness of the upstream filter element.

173. An article according to claim 172, wherein the hardness of the terminal filter element is at least 3% greater than the hardness of the upstream filter element.

174. An article according to claim 171, wherein the axial length of the terminal filter element is greater than the axial length of the upstream filter element.

175. An article according to claim 174, wherein the axial length of the terminal filter element is 2 mm or more greater than the axial length of the upstream filter element.

176. An article according to claim 171, wherein the terminal filter element is a hollow bore filter element.

177. An article according to claim 176, wherein the upstream filter element is a hollow bore filter element.

178. An article according to claim 177, wherein the terminal filter element has an axial bore having a smaller diameter than an axial bore in the upstream filter element.

179. An article according to claim 171, wherein the upstream filter element and terminal filter element are spaced by an aerosol-cooling element and/or a spacer element.

180. A system comprising a smoking substitute article according to claim 171, and a device comprising a heating element.

181. A system according to claim 180, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

182. A method of using the system according to claim 180, the method comprising: inserting the article into the device; and heating the article using the heating element.

183. A method according to claim 181, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

184. An aerosol-forming article comprising an aerosol-forming substrate and a hollow bore terminal filter element at a downstream axial end of the article/consumable wherein the article comprises at least one radial air flow path into the aerosol-forming substrate.

185. An article according to claim 184, wherein the article is a heat-not-burn (HNB) consumable.

186. An article according to claim 184, comprising a plurality of radial air flow paths which may be circumferentially-arranged around the aerosol-forming article.

187. An article according to claim 184, wherein the aerosol-forming substrate is circumscribed by a wrapping layer and the radial air flow path(s) may be provided by one or more ventilation holes provided in the wrapping layer.

188. An article according to claim 184, further comprising a spacer element or an aerosol-cooling element upstream and axially adjacent the terminal filter element.

189. An article according to claim 184, further comprising an upstream filter element provided upstream of terminal filter element and downstream of the aerosol-forming substrate.

190. An article according to claim 189 wherein the upstream filter element is a hollow bore filter element.

191. An article according to claim 184, wherein the aerosol-forming substrate comprises a gathered sheet of homogenised tobacco or gathered shreds/strips formed from such a sheet.

192. An article according to claim 184, wherein the aerosol-forming substrate further comprises one or more additives selected from humectants, flavourants, fillers, aqueous/non-aqueous solvents and binders.

193. A system comprising a smoking substitute article according to claim 184, and a device comprising a heating element.

194. A system according to claim 193, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

195. A method of using the system according to claim 193, the method comprising: inserting the article into the device; and heating the article using the heating element.

196. A method according to claim 195, comprising inserting the article into a cavity within a main body of the device and penetrating the article with the heating element upon insertion of the article.

197. An aerosol-forming article comprising an aerosol-forming substrate and a terminal filter element at the downstream axial end of the article wherein the terminal filter element comprises an adsorbent additive.

198. An article according to claim 197, wherein the adsorbent additive is selected from one or more of a zeolite, an activated carbon, a silica gel, a clay, a porous polymer and activated alumina.

199. An article according to claim 198, wherein the adsorbent is activated carbon.

200. An article according to claim 197, wherein the terminal filter element comprises a terminal filter portion and an upstream filter portion and wherein at least a portion of adsorbent additive is sandwiched between the upstream filter portion and the terminal filter portion.

201. An article according to claim 197, wherein the adsorbent additive is evenly distributed throughout the terminal filter portion.

202. An article according to claim 197, further comprising an upstream filter element.

203. An article according to claim 202, wherein the terminal filter element and the upstream filter element are axially spaced by an aerosol-cooling element and/or a spacer element.

204. An aerosol-forming article comprising an aerosol-forming substrate and at least one filter element wherein the at least one filter element comprises at least one polar solvent.

205. An aerosol-forming article according to claim 204, wherein the at least one polar solvent is one or more polar solvents selected from water and polar organic solvents.

206. An aerosol-forming article according to claim 205, wherein the polar organic solvent(s) is/are selected from ethanol, isopropyl alcohol and dimethylsulfoxide.

207. An aerosol-forming article according to claim 204, wherein the at least one polar solvent is evenly distributed throughout the filter element.

208. An aerosol-forming article according to claim 204, wherein the at least one polar solvent is concentrated in discrete regions within the filter element.

209. An aerosol-forming article according to claim 208, wherein the polar solvent is contained in one or more frangible capsules.

210. An aerosol-forming article according to claim 209, wherein the or each capsule is a crushable capsule configured to break and release the polar solvent when crushed.

211. An aerosol-forming article according to claim 209, wherein the or each capsule is a thermally labile capsule configured to melt/deform and release the polar solvent when heated.

212. An aerosol-forming article according to claim 204, wherein the filter element is a terminal filter element.

213. A method comprising: using a polar solvent in a filter element of an aerosol-forming article to filter hazardous substances from an aerosol that is drawn through the filter element.

214. The method according to claim 213, wherein the aerosol forming article comprises an aerosol-forming substrate and at least one filter element wherein the at least one filter element comprises at least one polar solvent.

215. An article according to claim 197, wherein the article is a heat not burn (HNB) consumable.

216. A system comprising an article according to claim 197 a device comprising a heating element.

217. A system according to claim 216 wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

218. A method of using the system according to claim 216, the method comprising: inserting the article into the device; and heating the article using the heating element.

219. A method according to claim 218, comprising inserting the article into a cavity within a main body of the device main body and penetrating the article with the heating element upon insertion of the article.

220. An aerosol-forming article comprising an aerosol-forming substrate and at least one filter element downstream of the substrate wherein the at least one filter element is a hollow bore filter element and wherein the article has at least one unimpeded flow path along the outer surface of the filter element.

221. An article according to claim 220 wherein the article is a heat-not-burn (HNB) consumable.

222. A heat-not-burn (HNB) consumable comprising an aerosol-forming substrate and at least one filter element downstream of the substrate wherein the consumable has at least one unimpeded flow path along the outer surface of the filter element.

223. The consumable of claim 222 wherein the filter element is a solid filter element.

224. The consumable of claim 222, wherein the filter element has an outer surface comprising a plurality of longitudinally-extending channels.

225. The consumable of claim 222, further comprising a sleeve circumscribing the filter element.

226. The consumable of claim 222, wherein the filter element comprises a flavourant.

227. The consumable according to claim 226, wherein the filter element comprises a longitudinally-extending thread carrying the flavourant.

228. The consumable of claim 222, wherein the filter element is a terminal filter element provided at the downstream axial end of the article/consumable.

229. The consumable according to claim 228, further comprising an upstream filter element upstream from the terminal filter element.

230. The consumable according to claim 229, wherein the terminal filter element and the upstream filter element are axially spaced by an aerosol-cooling element and/or a spacer element.

231. A system comprising the consumable according to claim 222, and a device comprising a heating element.

232. A system according to claim 231, wherein the device comprises a main body for housing the heating element and the heating element comprises an elongated heating element.

233. A method of using the system according to claim 231, the method comprising: inserting the consumable into the device; and heating the consumable using the heating element.

234. A method according to claim 233, comprising inserting the consumable into a cavity within a main body of the device and penetrating the consumable with the heating element upon insertion of the consumable.

Description

SUMMARY OF THE FIGURES

[0965] So that the invention may be understood, and so that further aspects and features thereof may be appreciated, embodiments illustrating the principles of the invention will now be discussed in further detail with reference to the accompanying figures, in which:

[0966] FIG. 1 shows a first embodiment of a first mode of an HNB consumable.

[0967] FIG. 2 shows a second embodiment of the first mode of an HNB consumable.

[0968] FIG. 3 shows the first embodiment of FIG. 1 within a device forming an HNB system.

[0969] FIG. 4 shows a first embodiment of a second mode of an HNB consumable.

[0970] FIG. 5 shows a second embodiment of the second mode of an HNB consumable.

[0971] FIG. 6 shows a third embodiment of the second mode of an HNB consumable.

[0972] FIG. 7 shows the first embodiment of FIG. 4 within a device forming an HNB system.

[0973] FIG. 8 shows a first embodiment of a third mode of an HNB consumable.

[0974] FIG. 9 shows a second embodiment of the third mode of an HNB consumable.

[0975] FIG. 10 shows a third embodiment of the third mode of an HNB consumable.

[0976] FIG. 11 shows the first embodiment of FIG. 8 within a device forming an HNB system.

[0977] FIG. 12 shows a first embodiment of a fourth mode of an HNB consumable.

[0978] FIG. 13 shows a second embodiment of the fourth mode of an HNB consumable.

[0979] FIG. 14 shows the first embodiment of FIG. 12 within a device forming an HNB system.

[0980] FIG. 15 shows a first embodiment of a fifth mode of an HNB consumable.

[0981] FIG. 16 shows a second embodiment of the fifth mode of an HNB consumable.

[0982] FIG. 17 shows a third embodiment of the fifth mode of an HNB consumable.

[0983] FIG. 18 shows the first embodiment of FIG. 15 within a device forming an HNB system.

[0984] FIG. 19 shows a first embodiment of a sixth mode of an HNB consumable.

[0985] FIG. 20 shows a second embodiment of the sixth mode of an HNB consumable.

[0986] FIG. 21 shows a third embodiment of the sixth mode of an HNB consumable.

[0987] FIG. 22 shows the first embodiment of FIG. 19 within a device forming an HNB system.

[0988] FIGS. 23A and 23B show a perspective and end view, respectively, of the first embodiment of the consumable of FIG. 19.

[0989] FIGS. 24, 25, and 26 are end views of exemplary embodiments of a filter element for the sixth mode of a HNB consumable.

[0990] FIG. 27 shows a first embodiment of a seventh mode of an HNB consumable.

[0991] FIG. 28 shows a second embodiment of the seventh mode of an HNB consumable.

[0992] FIG. 29 shows a third embodiment of the seventh mode of an HNB consumable.

[0993] FIG. 30 shows the first embodiment of the seventh mode of FIG. 27 within a device forming an HNB system.

[0994] FIG. 31 shows the first embodiment of FIG. 27 within a second device forming a second HNB system.

[0995] FIG. 32 shows a first embodiment of an eighth mode of an HNB consumable.

[0996] FIG. 33 shows a second embodiment of the eighth mode of an HNB consumable.

[0997] FIG. 34 shows a third embodiment of the eighth mode of an HNB consumable.

[0998] FIG. 35 shows the first embodiment of FIG. 32 within a device forming an HNB system.

[0999] FIG. 36 shows a first embodiment of a ninth mode of an HNB consumable.

[1000] FIG. 37 shows a second embodiment of the ninth mode of an HNB consumable.

[1001] FIG. 38 shows a third embodiment of the ninth mode of an HNB consumable.

[1002] FIG. 39 shows the first embodiment of FIG. 36 within a device forming an HNB system.

[1003] FIG. 40 shows a first embodiment of a tenth mode of an HNB consumable.

[1004] FIG. 41 shows the first embodiment of the tenth mode of the HNB consumable in a second condition.

[1005] FIG. 42 shows a second embodiment of the tenth mode of an HNB consumable.

[1006] FIG. 43 shows a third embodiment of the tenth mode of an HNB consumable.

[1007] FIG. 44 shows the first embodiment of FIG. 40 within a device forming an HNB system.

[1008] FIG. 45 shows a first embodiment of an eleventh mode of an HNB consumable.

[1009] FIG. 46 shows a second embodiment of the eleventh mode of an HNB consumable.

[1010] FIG. 47 shows the first embodiment of FIG. 45 within a device forming an HNB system.

[1011] FIG. 48 shows a first embodiment of a twelfth mode of an HNB consumable;

[1012] FIG. 49 shows a second embodiment of the twelfth mode of an HNB consumable;

[1013] FIG. 50 shows the first embodiment of FIG. 48 within a device forming an HNB system.

[1014] FIG. 51 shows a first embodiment of a thirteenth mode of an HNB consumable.

[1015] FIG. 52 shows a second embodiment of the thirteenth mode of an HNB consumable.

[1016] FIG. 53 shows the first embodiment of FIG. 51 within a device forming an HNB system.

[1017] FIG. 54 shows a first embodiment of a fourteenth mode of an HNB consumable;

[1018] FIG. 55 shows a second embodiment of the fourteenth mode of an HNB consumable;

[1019] FIG. 56 shows a third embodiment of the fourteenth mode of an HNB consumable;

[1020] FIG. 57 shows the first embodiment of FIG. 54 within a device forming an HNB system.

[1021] FIG. 58 shows a first embodiment of a fifteenth mode of an HNB consumable.

[1022] FIG. 59 shows a second embodiment of the fifteenth mode of an HNB consumable.

[1023] FIG. 60 shows a third embodiment of the fifteenth mode of an HNB consumable.

[1024] FIG. 61 shows a fourth embodiment of the fifteenth mode of an HNB consumable within a device forming an HNB system.

[1025] FIG. 62 shows a fifth embodiment of the fifteenth mode of an HNB consumable.

[1026] FIG. 63 shows a sixth embodiment of the fifteenth mode of an HNB consumable.

[1027] FIG. 64 shows a seventh embodiment of the fifteenth mode of an HNB consumable.

[1028] FIG. 65 shows the fifth embodiment of the fifteenth mode within a device forming an HNB system.

[1029] FIG. 66 shows a first embodiment of a sixteenth mode of an HNB consumable.

[1030] FIG. 67 shows a second embodiment of the sixteenth mode of an HNB consumable.

[1031] FIG. 68 shows the terminal filter element of the second embodiment of the sixteenth mode.

[1032] FIG. 69 shows the second embodiment of the sixteenth mode within a device forming an HNB system.

DETAILED DESCRIPTION OF THE FIGURES

First Mode of the Disclosure

[1033] As shown in FIG. 1, the HNB consumable 1 comprises an aerosol-forming substrate 2 at the upstream end of the consumable 1.

[1034] The aerosol-forming substrate comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1035] The aerosol-forming substrate 2 comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1036] The aerosol-forming substrate 2 is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1037] The aerosol-forming substrate 2 is circumscribed by a paper wrapping layer 3.

[1038] The consumable 1 comprises an upstream filter element 4 and a downstream (terminal) filter element 5. The two filter elements 4, 5 and spaced by a cardboard tube spacer 6. Both filter elements 4, 5 are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1039] Both filter elements have a substantially cylindrical shape. The diameter of the upstream filter 4 matches the diameter of the aerosol-forming substrate 2. The diameter of the terminal filter element 5 is slightly larger and matches the combined diameter of the aerosol-forming substrate 2 and the wrapping layer 3. The upstream filter element is slightly shorter in axial length than the terminal filter element at an axial length of 10 mm compared to 12 mm for the terminal filter element.

[1040] The cardboard tube spacer is longer than each of the two filter elements having an axial length of around 14 mm.

[1041] Upstream filter element 4 is a hollow bore filter element with a hollow, longitudinally-extending axial bore 14.

[1042] The terminal filter element 5 has a hollow, longitudinally-extending bore 15 that is axially offset.

[1043] The diameter of the axial bore 14 in the upstream filter 4 is slightly larger than the diameter of the off-set bore in the terminal filter element 5 having a diameter of 3 mm compared to 2 mm for the terminal filter element.

[1044] The cardboard tube spacer 6 and the upstream filter element 4 are circumscribed by the wrapping layer 3.

[1045] The terminal filter element 5 is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7. The tipping layer 7 encircles the terminal filter element 5 and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6.

[1046] FIG. 2 shows a second embodiment of a consumable 1′ which is the same as the first embodiment except that the wrapping layer 3 does not completely circumscribe the cardboard tube spacer 6 such that there is an annular gap 9 between the tipping layer 7 and the cardboard tube spacer 6 downstream of the end of the wrapping layer 3.

[1047] FIG. 3 shows the first embodiment inserted into an HNB device 10 comprising a rod-shaped heating element 20. The heating element 20 projects into a cavity 11 within the main body 12 of the device.

[1048] The consumable 1 is inserted into the cavity 11 of the main body 12 of the device 10 such that the heating rod 20 penetrates the aerosol-forming substrate 2. Heating of the reconstituted tobacco in the aerosol-forming substrate 2 is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5.

[1049] As the vapour cools within the upstream filter element 4 and the cardboard tube spacer 6, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

Second Mode of the Disclosure

[1050] As shown in FIG. 4, an HNB consumable 1a comprises an aerosol-forming substrate 2a at the upstream end of the consumable 1a.

[1051] The aerosol-forming substrate comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1052] The aerosol-forming substrate 2a comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1053] The aerosol-forming substrate 2a is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1054] The aerosol-forming substrate 2a is circumscribed by a paper wrapping layer 3a.

[1055] The consumable 1a comprises an upstream filter element 4a and a downstream (terminal) filter element 5a. The two filter elements 4a, 5a and spaced by a cardboard tube spacer 6a. Both filter elements 4a, 5a are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1056] Both filter elements have a substantially cylindrical shape. The diameter of the upstream filter 4a matches the diameter of the aerosol-forming substrate 2a. The diameter of the terminal filter element 5a is slightly larger and matches the combined diameter of the aerosol-forming substrate 2a and the wrapping layer 3a. The upstream filter element is slightly shorter in axial length than the terminal filter element at an axial length of 10 mm compared to 12 mm for the terminal filter element.

[1057] The cardboard tube spacer 6a is longer than each of the two filter portions having an axial length of around 14 mm.

[1058] Each filter element 4a, 5a is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter is slightly larger than the diameter of the bore in the terminal filter having a diameter of 3 mm compared to 2 mm for the terminal filter element.

[1059] The cardboard tube spacer 6a and the upstream filter portion 4a are circumscribed by the wrapping layer 3a.

[1060] The terminal filter element 5a is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7a. The tipping layer 7a encircles the terminal filter portion and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6a.

[1061] A flow restrictor element 13a in the form of a foil disc with a single perforation 14a having a 1 mm diameter is provided at the downstream of the of the upstream filter element 4a, i.e., it is interposed between the upstream filter element 4a and the cardboard tube spacer 6a.

[1062] FIG. 5 shows a second embodiment of a consumable 1a′ which is the same as that shown in FIG. 4 except that the terminal filter element 5a is a solid filter element and comprises a crushable capsule 8a (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8a is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the terminal filter portion 5a.

[1063] FIG. 6 shows a third embodiment of a consumable 1a″ which is the same as the first embodiment except that the wrapping layer 3a does not completely circumscribe the cardboard tube spacer 6a such that there is an annular gap 9a between the tipping layer 7a and the cardboard tube spacer 6a downstream of the end of the wrapping layer 3a.

[1064] FIG. 7 shows the first embodiment inserted into an HNB device 10a comprising a rod-shaped heating element (not shown). The heating element projects into a cavity 11a within the main body 12a of the device.

[1065] The consumable 1a is inserted into the cavity 11a of the main body 12a of the device 10a such that the heating rod penetrates the aerosol-forming substrate 2a. Heating of the reconstituted tobacco in the aerosol-forming substrate 2a is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and nicotine from within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter portion 5a.

[1066] After the vapour passes through the upstream filter 4a, the nicotine, moisture and humectant are forced to co-locate as they pass through the perforation 14a in the flow restrictor element 13a thus effecting good mixing. The vapour flow path then increases in cross-sectional area within the cardboard tube spacer 6a which further effects efficient mixing of the vapour components.

[1067] As the vapour cools within the cardboard tube spacer 6a, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

Third Mode of the Disclosure

[1068] As shown in FIG. 8, the HNB consumable 1b comprises an aerosol-forming substrate 2b at the upstream end of the consumable 1b.

[1069] The aerosol-forming substrate comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1070] The aerosol-forming substrate 2b comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1071] The aerosol-forming substrate 2b is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1072] The aerosol-forming substrate 2b is circumscribed by a paper wrapping layer 3b.

[1073] The consumable 1b comprises an upstream filter element 4b and a downstream (terminal) filter element 5b. The two filter elements 4b, 5 and spaced by a cooling element 6b. Both filter elements 4b, 5 are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1074] Both filter elements have a substantially cylindrical shape. The diameter of the upstream filter element 4b matches the diameter of the aerosol-forming substrate 2bb. The diameter of the terminal filter element 5b is slightly larger and matches the combined diameter of the aerosol-forming substrate 2b and the wrapping layer 3b. The upstream filter element 4b is slightly shorter in axial length than the terminal filter element 5b at an axial length of 10 mm compared to 12 mm for the terminal filter element 5b.

[1075] The cooling element 6b has a substantially cylindrical form and is longer than each of the two filter elements 4b, 5 having an axial length of around 14 mm. The cooling element 6b comprises a fibrous mass (formed of viscose fibres) that is formed into the substantially cylindrical shape. Although not apparent from the figure, a plurality of phase change beads are distributed evenly within the fibrous mass. Each phase change bead is in the form of a spherical bead comprising a glass outer shell and a core of isocane (i.e., the phase change material). Outlast® Viscose Fibre (e.g., 7.0 dtex) may be used to form the cooling element 6b.

[1076] Each filter element 4b, 5b is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter is slightly larger than the diameter of the bore in the terminal filter having a diameter of 3 mm compared to 2 mm for the terminal filter element 5b.

[1077] The cooling element 6b and the upstream filter element 4b are circumscribed by the wrapping layer 3b.

[1078] The terminal filter element 5b is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7b. The tipping layer 7b encircles the terminal filter element 5b and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6b.

[1079] FIG. 9 shows a second embodiment of a consumable 1b′ which is the same as that shown in FIG. 8 except that the terminal filter element 5b is a solid filter element and comprises a crushable capsule 8b (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8b is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the terminal filter element 5b.

[1080] FIG. 10 shows a third embodiment of a consumable 1b″ which is the same as the first embodiment except that the wrapping layer 3b does not completely circumscribe the cooling element 6b such that there is an annular gap between the tipping layer 7b and the cooling element 6b downstream of the end of the wrapping layer 3b.

[1081] FIG. 11 shows the first embodiment inserted into an HNB device 10b comprising a rod-shaped heating element 20b. The heating element 20b projects into a cavity 11b within the main body 12b of the device.

[1082] The consumable 1b is inserted into the cavity 11b of the main body 12b of the device 10b such that the heating rod 20b penetrates the aerosol-forming substrate 2b. Heating of the reconstituted tobacco in the aerosol-forming substrate 2b is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5b.

[1083] As the vapour cools within the upstream filter element 4b and the cardboard tube spacer 6b, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

Fourth Mode of the Disclosure

[1084] As shown in FIG. 12, a HNB consumable 1c comprises an aerosol-forming substrate 2c at the upstream end of the consumable 1c.

[1085] The aerosol-forming substrate 2c comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1086] The aerosol-forming substrate 2c comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate 2c further comprises cellulose pulp filler and guar gum binder.

[1087] The aerosol-forming substrate 2c is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1088] The aerosol-forming substrate 2c is circumscribed by a paper wrapping layer 3c.

[1089] The consumable 1c comprises an upstream filter element 4c and a downstream (terminal) filter element 5c. The two filter elements 4c, 5c and spaced by a cardboard spacer tube 6c. Both filter elements 4c, 5c are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown). The density of the cellulose acetate tow is greater in the terminal filter element 5c.

[1090] Both filter elements 4c, 5c have a substantially cylindrical shape. The diameter of the upstream filter 4c matches the diameter of the aerosol-forming substrate 2c. The diameter of the terminal filter element 5c is slightly larger and matches the combined diameter of the aerosol-forming substrate 2c and the wrapping layer 3c. The upstream filter element 4c is slightly shorter in axial length than the terminal filter element 5c at an axial length of 10 mm compared to 12 mm for the terminal filter element 5c.

[1091] The cardboard tube spacer 6c is longer than each of the two filter portions having an axial length of around 14 mm.

[1092] Each filter element 4c, 5c is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter 4c is slightly larger than the diameter of the bore in the terminal filter 5c having a diameter of 3 mm compared to 2 mm for the terminal filter element 5c.

[1093] The cardboard spacer tube 6c and the upstream filter portion 4c are circumscribed by the wrapping layer 3c.

[1094] The terminal filter element 5c is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7c. The tipping layer 7c encircles the terminal filter portion and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6c.

[1095] FIG. 13 shows a second embodiment of a consumable 1c′ which is the same as the first embodiment except that the wrapping layer 3c does not completely circumscribe the cardboard spacer tube 6c such that there is an annular gap 9c between the tipping layer 7c and the cardboard spacer tube 6c downstream of the end of the wrapping layer 3c.

[1096] FIG. 14 shows the first embodiment inserted into an HNB device 10c comprising a rod-shaped heating element (not shown). The heating element projects into a cavity 11c within the main body 12c of the device.

[1097] The consumable 1c is inserted into the cavity 11c of the main body 12c of the device 10c such that the heating rod penetrates the aerosol-forming substrate 2c. Heating of the reconstituted tobacco in the aerosol-forming substrate 2c is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter portion 5c.

[1098] As the vapour cools within the upstream filter element 4c and the cardboard spacer tube 6c, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1099] Fifth Mode of the Present Disclosure

[1100] As shown in FIG. 15, the HNB consumable 1d comprises an aerosol-forming substrate 2d at the upstream end of the consumable 1d.

[1101] The aerosol-forming substrate 2d comprises a first, upstream portion 13d of reconstituted tobacco spaced from a second, downstream portion 14d of reconstituted tobacco by a cavity 15d.

[1102] The cavity 15d is filled with granules/chips/pellets of extruded tobacco 16d.

[1103] The aerosol-forming substrate 2d is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG).

[1104] The aerosol-forming substrate 2d is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and each of the two portions 13d, 14d of reconstituted tobacco has an axial length of around 7 mm whilst the cavity 15d has an axial length of around 6 mm.

[1105] The aerosol-forming substrate 2d is circumscribed by a paper wrapping layer 3d.

[1106] The consumable 1d comprises an upstream filter element 4d and a downstream (terminal) filter element 5d. The two filter elements 4d, 5d and spaced by a cardboard spacer tube 6d. Both filter elements 4d, 5d are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1107] Both filter elements 4d, 5d have a substantially cylindrical shape. The diameter of the upstream filter 4d matches the diameter of the aerosol-forming substrate 2d. The diameter of the terminal filter element 5d is slightly larger and matches the combined diameter of the aerosol-forming substrate 2d and the wrapping layer 3d. The upstream filter element 4d is slightly shorter in axial length than the terminal filter element 5d at an axial length of 10 mm compared to 12 mm for the terminal filter element 5d.

[1108] The cardboard tube spacer 6d is longer than each of the two filter portions having an axial length of around 14 mm.

[1109] Each filter element 4d, 5d is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter 4d is slightly larger than the diameter of the bore in the terminal filter 5d having a diameter of 3 mm compared to 2 mm for the terminal filter element 5d.

[1110] The cardboard spacer tube 6d and the upstream filter portion 4d are circumscribed by the wrapping layer 3d.

[1111] The terminal filter element 5d is joined to the upstream elements forming the consumable 1d by a circumscribing paper tipping layer 7d. The tipping layer 7d encircles the terminal filter portion 5d and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6d.

[1112] FIG. 16 shows a second embodiment of a consumable 1d′ which is the same as that shown in FIG. 15 except that the cavity 15d houses an additive carrier 17d which is a crushable capsule (crush-ball) having a shell wall containing polypropylene glycol or vegetable glycerine.

[1113] The terminal filter element 5d comprises a further crushable capsule 8d (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8d is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the terminal filter portion 5d. In other embodiments (not shown), the capsule 8d can be omitted.

[1114] Furthermore, the capsule could be included in the terminal filter portion 5d of the FIG. 15 embodiment.

[1115] FIG. 17 shows a third embodiment of a consumable 1d″ which is the same as the first embodiment of FIG. 15 except that the wrapping layer 3d does not completely circumscribe the cardboard spacer tube 6d such that there is an annular gap 9d between the tipping layer 7d and the cardboard spacer tube 6d downstream of the end of the wrapping layer 3d. In the FIG. 17 embodiment, the extruded tobacco 16d in the cavity 15d could be replaced with the crushable capsule 17d of the FIG. 16 embodiment and/or the crushable capsule 8d of the FIG. 16 may be included in the terminal filter portion 5d.

[1116] FIG. 18 shows the first embodiment of FIG. 15 inserted into an HNB device 10d comprising a rod-shaped heating element (not shown). The heating element projects into a cavity 11d within the main body 12d of the device 10d.

[1117] The consumable 1d may be inserted into the cavity 11d of the main body 12d of the device 10d such that the heating rod penetrates the aerosol-forming substrate 2d.

[1118] Heating of the reconstituted tobacco in the aerosol-forming substrate 2d is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter portion 5d. The additive carrier 17d and/or the crushable capsule 8d can be ruptured by pressure to modify the flavour and/or amount of visible vapour during smoking of the consumable.

[1119] As the vapour cools within the upstream filter element 4d and the cardboard spacer tube 6d, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1120] Sixth Mode of the Present Disclosure

[1121] As shown in FIG. 19, the HNB consumable 1e comprises an aerosol-forming substrate 2e at the upstream end of the consumable 1e.

[1122] The aerosol-forming substrate 2e comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1123] The aerosol-forming substrate 2e comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate 2e further comprises cellulose pulp filler and guar gum binder.

[1124] The aerosol-forming substrate 2e is formed in a substantially cylindrical shape such that the consumable 1e resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1125] The aerosol-forming substrate 2e is circumscribed by a paper wrapping layer 3e.

[1126] The consumable 1e comprises an upstream filter element 4e and a downstream (terminal) filter element 5e. The two filter elements 4e, 5e and spaced by a cardboard tube spacer 6e. Both filter elements 4e, 5e are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1127] Both filter elements 4e, 5e have a substantially cylindrical shape. The diameter of the upstream filter element 4e matches the diameter of the aerosol-forming substrate 2e. The diameter of the terminal filter element 5e is slightly larger and matches the combined diameter of the aerosol-forming substrate 2e and the wrapping layer 3e. The upstream filter element 4e is slightly shorter in axial length than the terminal filter element 5e at an axial length of 10 mm compared to 12 mm for the terminal filter element 5e.

[1128] The cardboard tube spacer 6e is longer than each of the two filter elements 4e, 5e having an axial length of around 14 mm.

[1129] Each filter element 4e, 5e is a hollow bore filter element with a hollow, longitudinally extending bore 7e, 8e. Although not immediately apparent from the figure, the bore 7e of the upstream filter element 4e has a generally circular transverse cross-section, whilst the bore 8e of the terminal filter element 5e has a non-circular transverse cross-section. This non-circular bore 8e, will be described in more detail with reference to FIGS. 23A and 23B.

[1130] The cardboard tube spacer 6e and the upstream filter element 4e are circumscribed by the wrapping layer 3e.

[1131] The terminal filter element 5e is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 9e. The tipping layer 9e encircles the terminal filter element 5e and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6e.

[1132] FIG. 20 shows a second embodiment of a consumable 1e′ which is the same as that shown in FIG. 19 except that the upstream filter element 4e is a solid filter element and comprises a crushable capsule 10e (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 10e is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the upstream filter element 4e.

[1133] FIG. 21 shows a third embodiment of a consumable 1e″ which is the same as the first embodiment except that the wrapping layer 3e does not completely circumscribe the cardboard tube spacer 6e such that there is an annular gap 11e between the tipping layer 9e and the cardboard tube spacer 6e downstream of the end of the wrapping layer 3e.

[1134] FIG. 22 shows the first embodiment inserted into an HNB device 12e comprising a rod-shaped heating element 20e. The heating element 20e projects into a cavity 13e within the main body 14e of the device 12e.

[1135] The consumable 1e is inserted into the cavity 13e of the main body 14e of the device 12e such that the heating rod 20e penetrates the aerosol-forming substrate 2e. Heating of the reconstituted tobacco in the aerosol-forming substrate 2e is effected by powering the heating element 20e (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5e.

[1136] As the vapour cools within the upstream filter element 4e and the cardboard tube spacer 6e, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1137] FIG. 23A is a perspective view of the first embodiment of the consumable 1e of FIG. 19, with a portion of the wrapping layer 3e and tipping paper 9e cut away (i.e., for the purpose of showing the internal structure). FIG. 23B is an end view of the first embodiment. As is apparent from these figures, the bore 8e of the terminal filter element 5e has a transverse cross-section that has a central portion 15e and a plurality of lobes 16e extending outwardly from the central portion 15e (i.e., so as to define a generally asterisk-shaped cross-section).

[1138] FIG. 24 shows a further embodiment of a terminal filter 5e′. This is the same as the previously described embodiments, except that the bore 8e′ of the terminal filter 5e′ comprises a heart-shaped transverse cross-section.

[1139] The embodiment of the terminal filter 5e″ shown in FIG. 25 comprises three bores 8e″. Each of the three bores 8e″ comprises a transverse cross-section that is triangular in shape.

[1140] FIG. 26 shows an embodiment of a terminal filter 5e′″ that comprises four bores 8e′″, 8e″″. In particular, the terminal filter 5e′″ comprises two bores 8e′″ that each have a transverse cross-section that is star-shaped, and two bores 8e″″ that each have a transverse cross-section that is square-shaped.

Seventh Mode of the Disclosure

[1141] As shown in FIG. 27, the HNB consumable 1f comprises an aerosol-forming substrate 2f at the upstream end of the consumable 1f.

[1142] The aerosol-forming substrate 2f comprises a first, axially upstream rod portion 13f formed of reconstituted tobacco (e.g., gathered strips/shreds of reconstituted tobacco sheet) which is axially adjacent a second, downstream rod portion 14f formed of an extruded tobacco rod. In other embodiments, the rod-shaped extrudate may be replaced with extruded tobacco granules/pellets/chips formed into a rod-shaped.

[1143] The upstream portion 13f is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The upstream portion 13f further comprises cellulose pulp filler and guar gum binder.

[1144] The aerosol-forming substrate 2f is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and each of the two rod portions 13f, 14f of reconstituted tobacco has an axial length of around 7 mm.

[1145] The aerosol-forming substrate 2f is circumscribed by a paper wrapping layer 3f.

[1146] The consumable 1f comprises an upstream filter element 4f and a downstream (terminal) filter element 5f. The two filter elements 4f, 5f and spaced by a cardboard spacer tube 6f. Both filter elements 4f, 5f are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1147] Both filter elements 4f, 5f have a substantially cylindrical shape. The diameter of the upstream filter 4f matches the diameter of the aerosol-forming substrate 2f. The diameter of the terminal filter element 5f is slightly larger and matches the combined diameter of the aerosol-forming substrate 2f and the wrapping layer 3f. The upstream filter element 4f is slightly shorter in axial length than the terminal filter element 5f at an axial length of 10 mm compared to 12 mm for the terminal filter element 5f.

[1148] The cardboard tube spacer 6f is longer than each of the two filter portions 4f, 5f having an axial length of around 14 mm.

[1149] Each filter element 4f, 5f is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter 4f is slightly larger than the diameter of the bore in the terminal filter 5f having a diameter of 3 mm compared to 2 mm for the terminal filter element 5f.

[1150] The cardboard spacer tube 6f and the upstream filter portion 4f are circumscribed by the wrapping layer 3f.

[1151] The terminal filter element 5f is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7f. The tipping layer 7f encircles the terminal filter portion 5f and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6f.

[1152] FIG. 28 shows a second embodiment of a consumable 1f′ which is the same as that shown in FIG. 27 except that the reconstituted tobacco is provided as a radially inner rod 13f′ and the extruded tobacco is provided as a radially outer tube 14f.

[1153] The terminal filter element 5f comprises a crushable capsule 8f (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8f is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the terminal filter portion 5f. In other embodiments (not shown), the capsule 8f can be omitted.

[1154] Furthermore, the capsule 8f could be included in the terminal filter portion 5f of the FIG. 27 embodiment.

[1155] FIG. 29 shows a third embodiment of a consumable 1f″ which is the same as the first embodiment except that the wrapping layer 3f does not completely circumscribe the cardboard spacer tube 6f such that there is an annular gap 9f between the tipping layer 7f and the cardboard spacer tube 6f downstream of the end of the wrapping layer 3f. Furthermore, the second, downstream portion 14f′ is provided as chips/granules/pellets of extruded tobacco. In the FIG. 29 embodiment, the axially segregated rod portions 13f, 14r could be replaced with the radially segregated rod/tube portions 13r, 14f of FIG. 28 or the chips/granules/pellets of extruded tobacco in the second, downstream portion 14f could be replaced with an extruded tobacco rod.

[1156] FIG. 30 shows the first embodiment inserted into an HNB device 10f comprising a rod-shaped heating element (not shown). The heating element projects into a cavity 11f within the main body 12f of the device.

[1157] The consumable 1f is inserted into the cavity 11f of the main body 12f of the device 10f such that the heating rod penetrates the aerosol-forming substrate 2f. Heating of the reconstituted tobacco in the aerosol-forming substrate 2f is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter portion 5f.

[1158] FIG. 31 shows the first embodiment inserted into a second HNB device comprising two axially spaced and separately controllable tubular heating elements 15f, 15r which surround the cavity 11f. In this way the rod portions 13f, 14f can be heated at different rates/temperatures.

[1159] As the vapour cools within the upstream filter element 4f and the cardboard spacer tube 6f, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

Eighth Mode of the Disclosure

[1160] As shown in FIG. 32, the HNB consumable 1g comprises an aerosol-forming substrate 2g at the upstream end of the consumable 1g.

[1161] The aerosol-forming substrate 2g comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1162] The aerosol-forming substrate 2g comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1163] The aerosol-forming substrate 2g is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1164] The aerosol-forming substrate 2g is circumscribed by a paper wrapping layer 3g.

[1165] The consumable 1g comprises an upstream filter element 4g and a downstream (terminal) filter element 5. The two filter elements 4g, 5g and spaced by a cardboard tube spacer 6g. The upstream filter element 4g is formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1166] The terminal filter element 5g comprise an upstream filter portion 5g′ in the form of a hollow bore filter element and a downstream filter portion 5g″ in the form of a solid filter element. The upstream 5g′ and downstream 5g″ filter portion are located axially adjacent to one another and are joined by a paper plug wrap (not shown). Both the upstream 5g′ and downstream 5g″ filter portions are formed of cellulose acetate tow. Although not apparent, the downstream filter portion 5g″ comprises an additive in the form of a menthol flavourant. The axial length of each of the filter portions 5g′, 5g″ is around 6 mm, such that the axial length of the terminal filter element 5g is around 12 mm.

[1167] Both filter elements 4g, 5g have a substantially cylindrical shape. The diameter of the upstream filter element 4g matches the diameter of the aerosol-forming substrate 2g. The diameter of the terminal filter element 5g is slightly larger and matches the combined diameter of the aerosol-forming substrate 2g and the wrapping layer 3g. The upstream filter element 4g is slightly shorter in axial length than the terminal filter element 5g at an axial length of 10 mm.

[1168] The cardboard tube spacer 6g is longer than each of the two filter elements 4g, 5g having an axial length of around 14 mm.

[1169] The upstream filter element 4g is a hollow bore filter element (like the upstream portion 5g′ of the terminal filter element 5g) with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter element 4g is slightly larger than the diameter of the bore in the upstream filter portion 5g′ of the terminal filter element 5g having a diameter of 3 mm compared to 2 mm for the upstream filter portion 5g′ of the terminal filter element 5g.

[1170] The cardboard tube spacer 6g and the upstream filter element 4g are circumscribed by the wrapping layer 3g.

[1171] The terminal filter element 5g is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7g tipping layer 7g (i.e., circumscribing the plug wrap joining the filter portions 5g′, 5b). The tipping layer 7g encircles the terminal filter element 5g and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6g.

[1172] FIG. 33 shows a second embodiment of a consumable 1g′ which is the same as that shown in FIG. 32 except that the downstream filter portion 5g″ of the terminal filter element 5g comprises a crushable capsule 8g (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8g is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the downstream filter portion 5g″ of the terminal filter element 5g.

[1173] FIG. 34 shows a third embodiment of a consumable 1g″ which is the same as the first embodiment except that the upstream filter portion 5g′ is a solid filter element and the downstream filter portion 5g″ is a hollow bore filter element (i.e., the arrangement is reversed from the previously described embodiments). Furthermore, the wrapping layer 3g does not completely circumscribe the cardboard tube spacer 6g such that there is an annular gap 9g between the tipping layer 7g and the cardboard tube spacer 6g downstream of the end of the wrapping layer 3g.

[1174] FIG. 35 shows the first embodiment inserted into an HNB device 11g comprising a rod-shaped heating element 20g. The heating element 20g projects into a cavity 12g within the main body 13g of the device.

[1175] The consumable 1g is inserted into the cavity 12g of the main body 13g of the device 11g such that the heating rod 20g penetrates the aerosol-forming substrate 2g. Heating of the reconstituted tobacco in the aerosol-forming substrate 2g is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5g.

[1176] As the vapour cools within the upstream filter element 4g and the cardboard tube spacer 6g, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

Ninth Mode of the Disclosure

[1177] As shown in FIG. 36, the HNB consumable 1h comprises an aerosol-forming substrate 2h at the upstream end of the consumable 1h.

[1178] The aerosol-forming substrate 2h comprises a rod-shaped extrudate of tobacco and is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG).

[1179] The aerosol-forming substrate 2h is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm. The extrudate comprises an axial bore 13h which has its axial upstream end at the axial upstream end of the aerosol-forming substrate 2h. The axial bore 13h extends the entire length of the extrudate and thus has an axial length of 12 mm. It has a bore diameter of around 2 mm.

[1180] The aerosol-forming substrate 2h is circumscribed by a paper wrapping layer 3h.

[1181] The consumable 1h comprises an upstream filter element 4h and a downstream (terminal) filter element 5h. The two filter elements 4h, 5h and spaced by a cardboard spacer tube 6h. Both filter elements 4h, 5h are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1182] Both filter elements 4h, 5h have a substantially cylindrical shape. The diameter of the upstream filter 4h matches the diameter of the aerosol-forming substrate 2h. The diameter of the terminal filter element 5h is slightly larger and matches the combined diameter of the aerosol-forming substrate 2h and the wrapping layer 3h. The upstream filter element 4h is slightly shorter in axial length than the terminal filter element 5h at an axial length of 10 mm compared to 12 mm for the terminal filter element 5h.

[1183] The cardboard tube spacer 6h is longer than each of the two filter portions 4h, 5h having an axial length of around 14 mm.

[1184] Each filter element 4h, 5h is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter 4h is slightly larger than the diameter of the bore in the terminal filter 5h having a diameter of 3 mm compared to 2 mm for the terminal filter element 5h.

[1185] The cardboard spacer tube 6h and the upstream filter portion 4h are circumscribed by the wrapping layer 3h.

[1186] The terminal filter element 5h is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7h. The tipping layer 7h encircles the terminal filter portion and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6h.

[1187] FIG. 37 shows a second embodiment of a consumable 1h′ which is the same as that shown in FIG. 36 except that the terminal filter element 5h is a solid filter element and comprises a crushable capsule 8h (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8h is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the terminal filter portion 5h. The capsule 8h may be omitted from the FIG. 37 embodiment and may be included in the FIG. 36 embodiment. In the second embodiment, the axial bore 13h does not extend the entire length of the substrate 2h.

[1188] FIG. 38 shows a third embodiment of a consumable 1h″ which is the same as the first embodiment except that the wrapping layer 3h does not completely circumscribe the cardboard spacer tube 6h such that there is an annular gap 9h between the tipping layer 7h and the cardboard spacer tube 6h downstream of the end of the wrapping layer 3h. Furthermore, the substrate 2h does not include an axial bore.

[1189] FIG. 39 shows the first embodiment inserted into an HNB device 10h comprising a rod-shaped heating element 20h. The heating element projects into a cavity 11h within the main body 12h of the device.

[1190] The consumable 1h is inserted into the cavity 11h of the main body 12h of the device 10h such that the heating rod 20h is received in the axial bore 13h of the aerosol-forming substrate 2h. Heating of the reconstituted tobacco in the aerosol-forming substrate 2h is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter portion 5h.

[1191] As the vapour cools within the upstream filter element 4h and the cardboard spacer tube 6h, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

Tenth Mode of the Disclosure

[1192] As shown in FIG. 40, the HNB consumable 1i comprises an aerosol-forming substrate 2i at the upstream end of the consumable 1i.

[1193] The aerosol-forming substrate 2i comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1194] The aerosol-forming substrate 2i comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate 2i further comprises cellulose pulp filler and guar gum binder.

[1195] The aerosol-forming substrate 2i is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1196] The aerosol-forming substrate 2i is circumscribed by a paper wrapping layer 3i.

[1197] The consumable 1i comprises an upstream filter element 4i and a downstream (terminal) filter element 5i. The two filter elements 4i, 5i are spaced by a cardboard tube spacer 6i. Both filter elements 4i, 5i are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1198] Both filter elements 4i, 5i have a substantially cylindrical shape. The diameter of the upstream filter 4i matches the diameter of the aerosol-forming substrate 2i. The diameter of the terminal filter element 5i is slightly larger and matches the combined diameter of the aerosol-forming substrate 2i and the wrapping layer 3i. The upstream filter element 4i is slightly shorter in axial length than the terminal filter element 5i at an axial length of 10 mm compared to 12 mm for the terminal filter element 5i.

[1199] The terminal filter element 5i is made up of two axially abutting filter portions 5i′ and Si“. The terminal portion 5i′ is a solid cellulose acetate tow filter portion. The upstream filter portion 5i” of the terminal filter element 5i is a cellulose acetate tow filter portion defining a hollow, longitudinally (axially) extending bore.

[1200] The cardboard tube spacer 6i is longer than each of the two filter elements 4i, 5i having an axial length of around 14 mm.

[1201] The diameter of the bore in the filter portion 4i is slightly larger than the diameter of the bore in the portion 5i′ of the terminal filter element 5i having a diameter of 3 mm compared to 2 mm for the terminal filter element portion 5i″.

[1202] The cardboard tube spacer 6i and the upstream filter element 4i are circumscribed by the wrapping layer 3i.

[1203] The terminal filter element 5i is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7i. The tipping layer 7i encircles the terminal filter element 5i and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6i.

[1204] A region of weakness 7i′ is provided in the paper tipping layer 7i, consisting of an annular array of perforations in the paper tipping layer 7i which circumscribes the terminal filter element 5i. The region of weakness 7i′ directly overlies the junction between the two filter portions 5i′ and 5i″.

[1205] Either before or during use, should the user require an increased intensity (lower level of filtration), force may be applied to the terminal filter portion 5i′ to break the region of weakness 7i′ and separate the two filter portions 5i′, 5i″ of the terminal filter element 5i. The terminal filter portion 5i′ may then be disposed of, for example into a waste bin or recycling.

[1206] FIG. 41 shows the consumable of FIG. 40 after removal of the terminal portion 5i′ of the terminal filter element 5i. The terminal filter element 55 now consists only of the hollow bore filter portion 5i′ which provides a reduced level of filtration relative to the longer terminal filter element 5i of FIG. 40. The reduced level of filtration is provided by both the reduced overall axial length of the terminal filter element 5i, and further reduction is provided by the fact that portion 5i″ includes the hollow bore. In alternative embodiments, filter portion 5i″ may be a solid filter and the reduction in level of filtration will be provided simply by the reduction in overall axial length of the terminal filter element after breakage.

[1207] FIG. 42 shows a second embodiment of a consumable 1i′ which is the same as that shown in FIG. 40 except that both filter portions 5i′, 5i″ of the terminal filter element 5i are solid filter portions and the upstream filter portion 5i″ comprises a crushable capsule 8i (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8i is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the upstream filter portion 5i″.

[1208] During use the user may apply pressure to the capsule 8i to break the capsule and release the flavourant. The flavour can be provided whether or not the user decides to break off the terminal filter portion 5i′ due to the location of the capsule within the other filter portion 5i″.

[1209] FIG. 43 shows a third embodiment of a consumable 1i″ which is the same as the first embodiment except that the wrapping layer 3i does not completely circumscribe the cardboard tube spacer 6i such that there is an annular gap 9i between the tipping layer 7i and the cardboard tube spacer 6i downstream of the end of the wrapping layer 3i.

[1210] FIG. 44 shows the first embodiment inserted into an HNB device 10i comprising a rod-shaped heating element 20i. The heating element 20i projects into a cavity 11i within the main body 12i of the device 10i.

[1211] The consumable 1i is inserted into the cavity 11i of the main body 12i of the device 10i such that the heating rod 20i penetrates the aerosol-forming substrate 2i. Heating of the reconstituted tobacco in the aerosol-forming substrate 2i is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5i.

[1212] As the vapour cools within the upstream filter element 4i and the cardboard tube spacer 6i, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

Eleventh Mode of the Disclosure

[1213] As shown in FIG. 45, the HNB consumable 1j comprises an aerosol-forming substrate 2j at the upstream end of the consumable 1j.

[1214] The aerosol-forming substrate 2j comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1215] The aerosol-forming substrate 2j comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1216] The aerosol-forming substrate 2j is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1217] The aerosol-forming substrate 2j is circumscribed by a paper wrapping layer 3j.

[1218] The consumable 1j comprises an upstream filter element 4j and a downstream (terminal) filter element 5j. The two filter elements 4j, 5j and spaced by a cardboard tube spacer 6j. Both filter elements 4j, 5j are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1219] Both filter elements 4j, 5j have a substantially cylindrical shape. The diameter of the upstream filter 4j matches the diameter of the aerosol-forming substrate 2j. The diameter of the terminal filter element 5j is slightly larger and matches the combined diameter of the aerosol-forming substrate 2j and the wrapping layer 3j. The upstream filter element 4j is shorter in axial length than the terminal filter element 5j at an axial length of 10 mm compared to 12 mm for the terminal filter element 5j.

[1220] The cardboard tube spacer 6j is longer than each of the two filter elements 4j, 5j having an axial length of around 14 mm.

[1221] Each filter element 4j, 5j is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter element 4j is slightly larger than the diameter of the bore in the terminal filter element 5j having a diameter of 3 mm compared to 2 mm for the terminal filter element 5j. The porosity of the upstream filter element 4j is greater than the porosity of the terminal filter element 5j.

[1222] The cardboard tube spacer 6j and the upstream filter element 4j are circumscribed by the wrapping layer 3j.

[1223] The terminal filter element 5j is joined to the upstream elements forming the consumable 1j by a circumscribing paper tipping layer 7j. The tipping layer 7j encircles the terminal filter element 5j and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6j.

[1224] FIG. 46 shows a third embodiment of a consumable 1j″ which is the same as the first embodiment except that the wrapping layer 3j does not completely circumscribe the cardboard tube spacer 6j such that there is an annular gap 9j between the tipping layer 7j and the cardboard tube spacer 6j downstream of the end of the wrapping layer 3j.

[1225] FIG. 47 shows the first embodiment inserted into an HNB device 10j comprising a rod-shaped heating element 20j. The heating element 20j projects into a cavity 11j within the main body 12j of the device.

[1226] The consumable 1j is inserted into the cavity 11j of the main body 12j of the device 10j such that the heating rod 20j penetrates the aerosol-forming substrate 2j. Heating of the reconstituted tobacco in the aerosol-forming substrate 2j is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5j.

[1227] As the vapour cools within the upstream filter element 4j and the cardboard tube spacer 6j, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1228] Providing a shorter upstream filter element 4j results in a greater concentration of nicotine at the terminal filter element 5j because there is less condensation of the nicotine on the upstream filter element 4j. The vapour containing an increased concentration of nicotine vapour can then pass unimpeded through the hollow bore filter of the terminal filter element 5j and the extended length (relative to the upstream filter element 4j) provide an increased opportunity for mixing of the components (e.g., nicotine and humectant) within the bore of the terminal filter element 5j. The increased density of the terminal filter element 5j also helps increase flow and therefore mixing of the aerosol/vapour within the bore of the terminal filter element 5j.

Twelfth Mode of the Disclosure

[1229] As shown in FIG. 48, the HNB consumable 1k comprises an aerosol-forming substrate 2k at the upstream end of the consumable 1k.

[1230] The aerosol-forming substrate 2k comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1231] The aerosol-forming substrate 2k comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate 2k further comprises cellulose pulp filler and guar gum binder.

[1232] The aerosol-forming substrate 2k is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1233] The aerosol-forming substrate 2k is circumscribed by a paper wrapping layer 3k.

[1234] The consumable 1k comprises an upstream filter element 4k and a downstream (terminal) filter element 5k. The two filter elements 4k, 5k and spaced by a cardboard tube spacer 6k. Both filter elements 4k, 5k are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1235] Both filter elements 4k, 5k have a substantially cylindrical shape. The diameter of the upstream filter 4k matches the diameter of the aerosol-forming substrate 2k. The diameter of the terminal filter element 5k is slightly larger and matches the combined diameter of the aerosol-forming substrate 2k and the wrapping layer 3k. The upstream filter element 4k is shorter in axial length than the terminal filter element 5k at an axial length of 10 mm compared to 12 mm for the terminal filter element 5k.

[1236] The cardboard tube spacer 6k is longer than each of the two filter elements 4k, 5k having an axial length of around 14 mm.

[1237] Each filter element 4k, 5k is a hollow bore filter element with a respective hollow, longitudinally extending bore 4k′, 5k′. The diameter of the bore 4k′ in the upstream filter element 4k is larger than the diameter of the bore 5k′ in the terminal filter element 5k having a diameter of 3 mm compared to 2 mm for the terminal filter element 5k. The porosity of the upstream filter element 4k is greater than the porosity of the terminal filter element 5k.

[1238] The cardboard tube spacer 6k and the upstream filter element 4k are circumscribed by the wrapping layer 3k.

[1239] The terminal filter element 5k is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7k. The tipping layer 7k encircles the terminal filter element 5k and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6k.

[1240] FIG. 49 shows a third embodiment of a consumable 1k″ which is the same as the first embodiment except that the wrapping layer 3k does not completely circumscribe the cardboard tube spacer 6k such that there is an annular gap 9k between the tipping layer 7k and the cardboard tube spacer 6k downstream of the end of the wrapping layer 3k.

[1241] FIG. 50 shows the first embodiment inserted into an HNB device 10k comprising a rod-shaped heating element 20k. The heating element 20k projects into a cavity 11k within the main body 12k of the device.

[1242] The consumable 1k is inserted into the cavity 11k of the main body 12k of the device 10k such that the heating rod 20k penetrates the aerosol-forming substrate 2k. Heating of the reconstituted tobacco in the aerosol-forming substrate 2k is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5k.

[1243] As the vapour cools within the upstream filter element 4k and the cardboard tube spacer 6k, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1244] By providing a terminal filter element 5k with a bore 5k′ having a reduced bore diameter (compared to the bore 4k′ in the upstream hollow bore filter element 4k), a greater mixing effect is achieved within the terminal hollow bore filter element 5k as all of the components of the vapour/aerosol are forced to co-locate within the more restricted hollow bore 5k′. The increased length of the terminal hollow bore filter 5k also provides for good mixing (within the bore) of the vapour components.

[1245] The increased density of the terminal filter element 5k also helps increase flow and therefore mixing of the aerosol/vapour within the bore 5k′ of the terminal filter element 5k.

Thirteenth Mode of the Disclosure

[1246] As shown in FIG. 51, the HNB consumable 1m comprises an aerosol-forming substrate 2m at the upstream end of the consumable 1m.

[1247] The aerosol-forming substrate 2m comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1248] The aerosol-forming substrate 2m comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1249] The aerosol-forming substrate 2m is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1250] The aerosol-forming substrate 2m is circumscribed by a paper wrapping layer 3m.

[1251] The consumable 1m comprises an upstream filter element 4m and a downstream (terminal) filter element 5m. The two filter elements 4m, 5m and spaced by a cardboard tube spacer 6m. Both filter elements 4m, 5m are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1252] Both filter elements 4m, 5m have a substantially cylindrical shape. The diameter of the upstream filter 4m matches the diameter of the aerosol-forming substrate 2m. The diameter of the terminal filter element 5m is slightly larger and matches the combined diameter of the aerosol-forming substrate 2m and the wrapping layer 3m. The upstream filter element 4m is shorter in axial length than the terminal filter element 5m at an axial length of 10 mm compared to 12 mm for the terminal filter element 5m.

[1253] The cardboard tube spacer 6m is longer than each of the two filter elements 4m, 5m having an axial length of around 14 mm.

[1254] Each filter element 4m, 5m is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter element 4m is slightly larger than the diameter of the bore in the terminal filter element 5m having a diameter of 3 mm compared to 2 mm for the terminal filter element 5m. The porosity of the upstream filter element 4m is greater than the porosity of the terminal filter element 5m.

[1255] The cardboard tube spacer 6m and the upstream filter element 4m are circumscribed by the wrapping layer 3m.

[1256] The terminal filter element 5m is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7m. The tipping layer 7m encircles the terminal filter element 5m and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6m.

[1257] The terminal filter element 5m has a greater hardness (95%) than the upstream filter element 4m hardness (90%).

[1258] FIG. 52 shows a second embodiment of a consumable 1m′ which is the same as the first embodiment except that the wrapping layer 3m does not completely circumscribe the cardboard tube spacer 6m such that there is an annular gap 9m between the tipping layer 7m and the cardboard tube spacer 6m downstream of the end of the wrapping layer 3m.

[1259] FIG. 53 shows the first embodiment inserted into an HNB device 10m comprising a rod-shaped heating element 20m. The heating element 20m projects into a cavity 11m within the main body 12m of the device 10m.

[1260] The consumable inn is inserted into the cavity 11m of the main body 12m of the device 10m such that the heating rod 20m penetrates the aerosol-forming substrate 2m. Heating of the reconstituted tobacco in the aerosol-forming substrate 2m is effected by powering the heating element 20m (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5m.

[1261] As the vapour cools within the upstream filter element 4m and the cardboard tube spacer 6m, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1262] Providing a harder terminal filter element 5m than the upstream filter element 4m increases the flow and mixing of the vapour/aerosol within the hollow bore of the terminal filter element 5m. The increased hardness/reduced porosity of the terminal filter element 5m forces the aerosol/vapour to enter the axial bore through the terminal filter element 5m (since the passage through the body of the terminal filter element 5m is impeded) and this forces the components within the vapour/aerosol to co-locate within the bore thus increasing mixing. Furthermore, the increased hardness of the terminal filter element 5m may reduce the need for filter plasticisers at the downstream (mouth) end of the article. The less hard/less dense upstream filter element 4m allows a greater passage of aerosol/vapour through the body of the upstream filer element thus filtering out harmful particulate matter prior to its delivery at the axial bore of the terminal filter element 5m. Furthermore, the hardness of the two filter elements 4m, 5m can be used to tailor the RTD of the consumable 1m.

Fourteenth Mode of the Disclosure

[1263] As shown in FIG. 54, the HNB consumable 1n comprises an aerosol-forming substrate 2n at the upstream end of the consumable 1n.

[1264] The aerosol-forming substrate comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1265] The aerosol-forming substrate 2n comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1266] The aerosol-forming substrate 2n is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1267] The aerosol-forming substrate 2n is circumscribed by a paper wrapping layer 3n.

[1268] The consumable 1n comprises an upstream filter element 4n and a downstream (terminal) filter element 5n. The two filter elements 4n, 5n and spaced by a cardboard tube spacer 6n. Both filter elements 4n, 5n are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1269] Both filter elements have a substantially cylindrical shape. The diameter of the upstream filter 4n matches the diameter of the aerosol-forming substrate 2n. The diameter of the terminal filter element 5n is slightly larger and matches the combined diameter of the aerosol-forming substrate 2n and the wrapping layer 3n. The upstream filter element is slightly shorter in axial length than the terminal filter element at an axial length of 10 mm compared to 12 mm for the terminal filter element.

[1270] The cardboard tube spacer is longer than each of the two filter elements having an axial length of around 14 mm.

[1271] Both filter elements 4n, 5n are hollow bore filter elements with a hollow, longitudinally-extending axial bore. The diameter of the axial bore in the upstream filter 4n is slightly larger than the diameter of the axial bore in the terminal filter element 5n having a diameter of 3 mm compared to 2 mm for the terminal filter element.

[1272] The cardboard tube spacer 6n and the upstream filter element 4n are circumscribed by the wrapping layer 3n.

[1273] The terminal filter element 5n is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7n. The tipping layer 7n encircles the terminal filter element 5n and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6n.

[1274] A plurality of radial air flow paths are provided by a first circumferentially-extending row of ventilation holes 13′, 13″ and an axially spaced second circumferentially-extending row of ventilation holes 14′, 14″ in the wrapping layer 3n which are circumferentially arranged around the aerosol-forming substrate 2n.

[1275] FIG. 55 shows a second embodiment of a consumable 1n′ which is the same as the first embodiment except that the upstream filter element 4n′ is a solid filter element and incudes a crushball 8n which contains a flavourant.

[1276] FIG. 56 shows a third embodiment of a consumable 1n″ which is the same as the first embodiment except that the wrapping layer 3n does not completely circumscribe the cardboard tube spacer 6n such that there is an annular gap 9n between the tipping layer 7n and the cardboard tube spacer 6n downstream of the end of the wrapping layer 3n.

[1277] FIG. 57 shows the first embodiment inserted into an HNB device 10n comprising a rod-shaped heating element 20n. The heating element 20n projects into a cavity 11n within the main body 12n of the device 10n.

[1278] The consumable 1n is inserted into the cavity 11n of the main body 12n of the device 10n such that the heating rod 20n penetrates the aerosol-forming substrate 2n. Heating of the reconstituted tobacco in the aerosol-forming substrate 2n is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5n.

[1279] As the vapour cools within the upstream filter element 4n and the cardboard tube spacer 6n, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1280] Inhalation by the user also draws in air along the radial flow paths through the ventilation holes 13′, 13″, 14′, 14″. This air helps to vaporise the nicotine and humectants within the aerosol-forming substrate to increase the volume of vapour and the TPM.

Fifteenth Mode of the Disclosure

[1281] As shown in FIG. 58, the HNB consumable 1p comprises an aerosol-forming substrate 2p at the upstream end of the consumable 1p.

[1282] The aerosol-forming substrate 2p comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1283] The aerosol-forming substrate 2p comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1284] The aerosol-forming substrate 2p is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1285] The aerosol-forming substrate 2p is circumscribed by a paper wrapping layer 3p.

[1286] The consumable 1p comprises an upstream filter element 4p and a downstream (terminal) filter element 5p. The two filter elements 4p, 5p are spaced by a cardboard spacer tube 6p. Both filter elements 4p, 5p are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1287] Terminal filter element 5p comprises an upstream filter portion 5p′ and a downstream filter portion 5p″ that sandwiches adsorbent additive 14p.

[1288] All filter elements/portions have a substantially cylindrical shape. The diameter of the upstream filter 4p matches the diameter of the aerosol-forming substrate 2p. The diameter of the terminal filter element 5p/terminal filter portions 5p′, 5p″ is slightly larger and matches the combined diameter of the aerosol-forming substrate 2p and the wrapping layer 3p. The upstream filter element 4p is slightly shorter in axial length than the terminal filter element 5p at an axial length of 10 mm compared to 12 mm for the terminal filter element 5p.

[1289] The cardboard tube spacer 6p is longer than each of the two filter elements 4p, 5p having an axial length of around 14 mm.

[1290] Upstream filter element 4p, upstream filter portion 5p′ and downstream filter portion 5p″ (forming the terminal filter element 5pp) are each a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter element 4p is slightly larger than the diameter of the bore in the terminal filter element 5p having a diameter of 3 mm compared to 2 mm for the terminal filter element 5p.

[1291] The cardboard spacer tube 6p and the upstream filter element 4p are circumscribed by the wrapping layer 3p.

[1292] The terminal filter element 5p is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7p. The tipping layer 7p encircles the terminal filter portion and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6p.

[1293] FIG. 59 shows a second embodiment of a consumable 1p which is the same as that shown in FIG. 58 except that filter element 5p is impregnated with additive adsorbent 14p throughout its entirety. Furthermore, the terminal filter element 5p is a solid filter element and comprises a crushable capsule 8p (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant. The capsule 8p is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the terminal filter portion 5p.

[1294] FIG. 60 shows a third embodiment of a consumable 1p which is the same as the first embodiment except that filter element 5p is impregnated with additive adsorbent 14p in an axially central portion that accounts for just under a third of the volume of filter element 5p. Furthermore, the wrapping layer 3p does not completely circumscribe the cardboard spacer tube 6p such that there is an annular gap 9p between the tipping layer 7p and the cardboard spacer tube 6p downstream of the end of the wrapping layer 3p.

[1295] FIG. 61 shows a fourth embodiment of the consumable 1p inserted into an HNB device 10p comprising a rod-shaped heating element 20p. The fourth embodiment is the same as the first embodiment except that the additive adsorbent 14p is in the form of pellets that are evenly distributed within the terminal filter element 5p. The heating element projects into a cavity 11p within the main body 12p of the device 10p.

[1296] The consumable 1p is inserted into the cavity 11p of the main body 12p of the device 10p such that the heating rod 20p penetrates the aerosol-forming substrate 2p. Heating of the reconstituted tobacco in the aerosol-forming substrate 2p is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter portion 5p.

[1297] As the vapour cools within the upstream filter element 4p and the cardboard spacer tube 6p, it condenses to form an aerosol containing the volatile compounds for inhalation by the user. The absorbent additive 14p within the terminal filter element 5pp removes hazardous substances from the aerosol as it passes through the terminal filter element 5p. In particular, the adsorbent additive 14 removes tobacco-specific nitrosamines (TSNAs) from the aerosol.

[1298] Turning now to consider FIG. 62, a fifth embodiment of a HNB consumable 1p comprises an aerosol-forming substrate 2p at the upstream end of the consumable 1p.

[1299] The aerosol-forming substrate comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1300] The aerosol-forming substrate 2p comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1301] The aerosol-forming substrate 2p is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1302] The aerosol-forming substrate 2p is circumscribed by a paper wrapping layer 3p.

[1303] The consumable 1p comprises an upstream filter element 4p and a downstream (terminal) filter element 5p.

[1304] The two filter elements 4p, 5 are spaced by a cardboard tube spacer 6p. Both filter elements 4p, 5 are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1305] Both filter elements have a substantially cylindrical shape. The diameter of the upstream filter 4p matches the diameter of the aerosol-forming substrate 2p. The diameter of the terminal filter element 5p is slightly larger and matches the combined diameter of the aerosol-forming substrate 2p and the wrapping layer 3p.

[1306] The upstream filter element is slightly shorter in axial length than the terminal filter element at an axial length of 10 mm compared to 12 mm for the terminal filter element. The cardboard tube spacer 6p is longer than each of the two filter portions having an axial length of around 14 mm.

[1307] Each filter element 4p, 5p is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter is slightly larger than the diameter of the bore in the terminal filter having a diameter of 3 mm compared to 2 mm for the terminal filter element.

[1308] The terminal filter element 5p is impregnated with water.

[1309] The cardboard tube spacer 6p and the upstream filter portion 4p are circumscribed by the wrapping layer 3p.

[1310] The terminal filter element 5p is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7p. The tipping layer 7p encircles the terminal filter portion and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6p.

[1311] FIG. 63 shows a sixth embodiment of a consumable 1p which is the same as that shown in FIG. 62 except that the terminal filter element 5p is a solid filter element and comprises a crushable capsule 8p (crush-ball) having a shell wall containing water. The capsule 8p is spherical and has a diameter of 3.5 mm. It is positioned within the axial centre of the terminal filter portion 5p.

[1312] FIG. 64 shows a seventh embodiment of a consumable 1p which is the same as the fifth embodiment except that the upstream filter element 4p is impregnated with water. Furthermore, the wrapping layer 3p does not completely circumscribe the cardboard tube spacer 6p such that there is an annular gap 9p between the tipping layer 7p and the cardboard tube spacer 6p downstream of the end of the wrapping layer 3p.

[1313] FIG. 65 shows the fifth embodiment inserted into an HNB device 10p comprising a rod-shaped heating element 20p. The heating element 20p projects into a cavity 11p within the main body 12p of the device 10p.

[1314] The consumable 1p is inserted into the cavity 11p of the main body 12p of the device 10p such that the heating rod 20p penetrates the aerosol-forming substrate 2p. Heating of the reconstituted tobacco in the aerosol-forming substrate 2p is effected by powering the heating element 20p (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter portion 5p.

[1315] As the vapour cools within the upstream filter element 4p and the cardboard tube spacer 6p, it condenses to form an aerosol containing the volatile compounds for inhalation by the user. The aerosol passes through the terminal filter element 5p where TSNA compounds are absorbed by the water contained within the terminal filter element.

Sixteenth Mode of the Disclosure

[1316] As shown in FIG. 66, the HNB consumable 1q comprises an aerosol-forming substrate 2q at the upstream end of the consumable 1q.

[1317] The aerosol-forming substrate 2q comprises reconstituted tobacco which includes nicotine as a volatile compound.

[1318] The aerosol-forming substrate 2q comprises 65 wt % tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco. The tobacco is dosed with 20 wt % of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt %. The aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.

[1319] The aerosol-forming substrate 2q is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7 mm and an axial length of around 12 mm.

[1320] The aerosol-forming substrate 2q is circumscribed by a paper wrapping layer 3q.

[1321] The consumable 1q comprises an upstream filter element 4q and a downstream (terminal) filter element 5q. The two filter elements 4q, 5q and spaced by a cardboard tube spacer 6q. Both filter elements 4q, 5q are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).

[1322] Both filter elements 4q, 5q have a substantially cylindrical shape. The diameter of the upstream filter 4q matches the diameter of the aerosol-forming substrate 2q. The upstream filter element 4q is slightly shorter in axial length than the terminal filter element 5q at an axial length of 10 mm compared to 12 mm for the terminal filter element 5q.

[1323] The cardboard tube spacer 6q is longer than each of the two filter elements 4q, 5q having an axial length of around 14 mm.

[1324] Each filter element 4q, 5q is a hollow bore filter element with a hollow, longitudinally extending bore. The diameter of the bore in the upstream filter 4q is slightly larger than the diameter of the bore in the terminal filter 5q having a diameter of 3 mm compared to 2 mm for the terminal filter element 5q.

[1325] The cardboard tube spacer 6q and the upstream filter element 4q are circumscribed by the wrapping layer 3q.

[1326] The terminal filter element 5q has a corrugated outer surface comprising a series of longitudinally-extending channels 10q. The terminal filter element 5q is circumscribed by a paper sleeve 9q which lies against the peaks of the corrugations on the outer surface of the terminal filter element 5q but leaves the longitudinally-extending channels 10q unimpeded.

[1327] The terminal filter element 5q is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7q. The tipping layer 7q encircles the terminal filter element 5q (and the paper sleeve 9q) and has an axial length of around 20 mm such that it overlays a portion of the cardboard tube spacer 6q.

[1328] FIG. 67 shows a second embodiment of a consumable 1q′ which is the same as that shown in FIG. 66 except that the terminal filter element 5q is a solid filter element and comprises a longitudinally-extending thread 8q soaked with a liquid menthol or cherry or vanilla flavourant. It is positioned along the axial centre of the terminal filter element 5q.

[1329] FIG. 68 shows an exploded view of the terminal filter element 5q comprising its plug wrap 11q which has corrugations matching those in the corrugated outer surface 12q of the terminal filter element 5q. The paper sleeve 9q overlays the outer surface 12q and plug wrap 11q and rests against the peaks in the corrugations leaving the longitudinally-extending channels 10q unimpeded. The tipping layer 7q circumscribes the paper sleeve 9q.

[1330] FIG. 69 shows the second embodiment inserted into an HNB device 10q comprising a rod-shaped heating element 20q. The heating element 20q projects into a cavity 11q within the main body 12q of the device 10q.

[1331] The consumable 1q is inserted into the cavity 11q of the main body 12q of the device 10q such that the heating rod 20q penetrates the aerosol-forming substrate 2q. Heating of the reconstituted tobacco in the aerosol-forming substrate 2q is effected by powering the heating element (e.g., with a rechargeable battery (not shown)). As the tobacco is heated, moisture and volatile compound (e.g., nicotine) within the tobacco and the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5q.

[1332] As the vapour cools within the upstream filter element 4q and the cardboard tube spacer 6q, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.

[1333] Some of the aerosol passes through the terminal filter element 5q where it is flavoured by the flavourant-soaked thread 8q. The remainder of the aerosol passes unimpeded through the longitudinal channels 10q in the outer surface of the filter element 5q thus increasing the visible vapour at the downstream axial end (mouth-end) of the consumable 1q.

[1334] The features disclosed in the foregoing description, or in the following claims, or in the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for obtaining the disclosed results, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

[1335] While the invention has been described in conjunction with the exemplary embodiments described above, many equivalent modifications and variations will be apparent to those skilled in the art when given this disclosure. Accordingly, the exemplary embodiments of the invention set forth above are considered to be illustrative and not limiting. Various changes to the described embodiments may be made without departing from the scope of the invention.

[1336] For the avoidance of any doubt, any theoretical explanations provided herein are provided for the purposes of improving the understanding of a reader. The inventors do not wish to be bound by any of these theoretical explanations.

[1337] Any section headings used herein are for organizational purposes only and are not to be construed as limiting the subject matter described.

[1338] Throughout this specification, including the claims which follow, unless the context requires otherwise, the words “have”, “comprise”, and “include”, and variations such as “having”, “comprises”, “comprising”, and “including” will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

[1339] It must be noted that, as used in the specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Ranges may be expressed herein as from “about” one particular value, and/or to “about” another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by the use of the antecedent “about,” it will be understood that the particular value forms another embodiment. The term “about” in relation to a numerical value is optional and means, for example, +/−10%.

[1340] The words “preferred” and “preferably” are used herein refer to embodiments of the invention that may provide certain benefits under some circumstances. It is to be appreciated, however, that other embodiments may also be preferred under the same or different circumstances. The recitation of one or more preferred embodiments therefore does not mean or imply that other embodiments are not useful, and is not intended to exclude other embodiments from the scope of the disclosure, or from the scope of the claims.