WICKING DEVICE FOR EVAPORATION OF A FRAGRANCE WITH A WICK HOLDER

Abstract

A device for the release, in particular for evaporation, of volatile substances such as fragrances or active substances, has a container for a substance to be released. At least one wick as a capillary element is in contact with the substance to be released and at least partially in the receptacle and has a substance release region. The wick, preferably its substance release region, is assigned a heating element, preferably an electrical heating element. The wick is assigned a squeezing device with a squeezing element, by which a squeezing region of the wick can be subjected to a squeezing force and/or can be compressed, in particular for a defined short period of time and/or temporarily. A defined amount of substance, in particular at least the substance collected in the squeezing region, can be conveyed with a boost in the direction of the substance release region.

Claims

1-39. (canceled)

40. A device for dispensing volatile substances, the device comprising: a container for receiving a substance to be dispensed; at least one wick forming a capillary element in contact with the substance to be dispensed, said at least one wick being arranged at least partly in said container and said at least one wick having a substance dispensing region; a heating element assigned to said wick; a squeezing device assigned to said wick, said squeezing element having at least one squeezing element disposed to subject a squeezing region of said wick to a squeezing force for causing a defined substance quantity to be conveyed substantially in the direction of the substance dispensing region of said wick.

41. The device according to claim 40, wherein the substance dispensing region is formed by a free wick end which projects beyond said container, and wherein said squeezing device is assigned to said wick at said free wick end such that said squeezing region of said wick is defined at said free wick end.

42. The device according to claim 40, wherein said at least one squeezing element is arranged on said squeezing device so as to be displaceable between a home position and a squeezing position.

43. The device according to claim 42, wherein said at least one squeezing element is disposed with a gap clearance from the squeezing region of said wick in the home position.

44. The device according to claim 40, wherein, when said squeezing device is actuated, said at least one squeezing element, which is pivotally connected to said squeezing device, in a state thereof pivoted into the squeezing position, abuts by way of a squeezing element contact surface against the wick squeezing region in a bearing connection.

45. The device according to claim 44, wherein said at least one squeezing element is arranged so as to be pivotable, in such a manner and/or in that the squeezing element contact surface comprises such a design and form that the wick in the wick squeezing region is acted upon by means of a force component which acts substantially in the direction of the substance dispensing region.

46. The device according to claim 44, wherein said squeezing element contact surface is configured with a design and form that said wick, in the wick squeezing region and when viewed in the direction of a wick vertical axis, comprises a form, in a direct contact region between the squeezing element contact surface and said wick when said squeezing device is actuated, which tapers at least in regions toward the direct contact region, and wherein the wick region, which connects between said at least one squeezing element and said wick in the direction of the wick vertical axis below the direct contact region, widens with a step or with an edge.

47. The device according to claim 40, wherein said squeezing device comprises a restoring device configured to displace said at least one squeezing element from the squeezing position back into the home position.

48. The device according to claim 47, wherein said restoring device is a restoring element, by means of which said at least one squeezing element is displaceable from the squeezing position back into the home position, wherein said restoring element is a constituent part of an actuating device of the squeezing device, by means of which said at least one squeezing element, when said actuating device is actuated, is displaceable from the squeezing position back into the home position, and/or in that said restoring element is formed by an elastically resilient element which is compressible when said at least one squeezing element is transferred into the squeezing position and which, when there is a lack of force application by said squeezing device and/or said squeezing device is not actuated, said at least one squeezing element moves automatically from the squeezing position back into the home position.

49. The device according to claim 47, wherein a restoring element of said restoring device is realized by the elastically resilient squeezing region of said wick and/or is realized by an elastically resilient connection between said at least one squeezing element and said squeezing device, where said at least one squeezing element, pre-tensioned in the direction of the home position, is connected in an elastically resilient manner to said squeezing device in such a manner that said at least one squeezing element, when there is a lack of force application by said squeezing device and/or said squeezing device is not actuated, moves automatically from the squeezing position back into the home position.

50. The device according to claim 40, wherein said squeezing device is formed with a wick through opening through which said wick is guided and where said at least one squeezing element assigned to the squeezing region of said wick.

51. The device according to claim 50, wherein said at least one squeezing element is arranged at least in regions around said wick through opening and consequently around said squeezing region of said wick.

52. The device according to claim 50, wherein: said wick through opening is formed in a plate-shaped or ring-shaped, holder of said squeezing device, and said at least one squeezing element is pivotably mounted at least in regions around said wick through opening and consequently around said squeezing region of said wick on said holder of said squeezing device.

53. The device according to claim 40, wherein said squeezing element is formed by a plurality of displaceable clamping jaws.

54. The device according to claim 53, wherein said plurality of clamping jaws are pivotably mounted about a vertical axis that is aligned in a direction of a wick axis or about a horizontal axis which is aligned transversely to the direction of the wick axis.

55. The device according to claim 53, wherein said plurality of clamping jaws which are pivotally hinged around said squeezing region of said wick, are spaced apart from one another in a circumferential direction at an identical gap clearance, and/or are each pivotable about a horizontal pivot axis that is aligned transversely to the direction of the wick axis.

56. The device according to claim 40, wherein said squeezing device comprises an actuating device which is coupled with said at least one squeezing element, and which is configured to displace said at least one squeezing element in the direction of said squeezing region of said wick.

57. The device according to claim 56, wherein said actuating device comprises at least one actuating element which, when said squeezing device is actuated, is displaceable from an initial position, in which said at least one actuating element does not exert any displacement force on said at least one squeezing element, into an actuating position which causes said at least one squeezing element to move in the direction of said wick squeezing region and said wick squeezing region to be compressed.

58. The device according to claim 57, wherein said at least one actuating element is disposed to cooperate with an outer surface of said at least one squeezing element remote from said wick, such that: said at least one actuating element encompasses said at least one squeezing element on the outer surface thereof remote from said wick at least in regions; and/or said at least one actuating element, upon being moved from the initial position into the actuating position, applies a displacement force onto the outer surface which causes said at least one squeezing element to move.

59. The device according to claim 53, wherein said at least one actuating element encompasses said clamping jaws on the outside surfaces thereof remote from said wick, such that said at least one actuating element, upon being moved from the initial position into the actuating position, applies a displacement force onto the outer surfaces of said clamping jaws which causes said clamping jaws to move.

60. The device according to claim 57, wherein said at least one actuating element is a rigid actuating element configured, when transferring from the initial position into the actuating position, to be guided along the outside surface of said at least one squeezing element and to displace the squeezing element from the home position into the squeezing position, wherein said at least one squeezing element has, on an outside surface remote from said wick, a displacement contour which interacts with said at least one actuating element when it is displaced from the initial position into the actuating position such that said at least one squeezing element is pivotally displaceable in a direction of the wick.

61. The device according to claim 60, wherein said displacement contour is formed by a structure which thickens when viewed in the displacement direction of said actuating element and/or a ramp structure which interacts with said at least one actuating element, when it is displaced from the initial position into the actuating position by pivoting said at least one squeezing element.

62. The device according to claim 60, wherein said actuating element is an actuating ring.

63. The device according to claim 57, wherein said at least one actuating element is an actuating ring which is elastic at least in regions and encompasses said at least one squeezing element on an outer surface thereof remote from said wick in a ring-shaped such that when said actuating device is actuated, said actuating ring is decompressed and as a result a ring diameter is modified in the sense of the actuating ring transferring from the initial position into the actuating position such that said at least one squeezing element is displaced from the home position into the squeezing position.

64. The device according to claim 57, wherein: said actuating device further comprises an actuating lever, by means of which said at least one actuating element is displaceable; said actuating lever is pivotably hinged at at least one pivot point on said container or on a component which is fixedly connectable to said container; and said actuating lever comprises at least one actuating element cooperation point which is at a spacing from the pivot point, to which actuating element cooperation point the actuating element is connected.

65. The device according to claim 64, wherein said actuating lever comprises a first L leg and a second L leg which each comprises a pivot point which, with reference to said container, lies on opposite sides of said container or of a component connected to said container, and each comprises an actuating element cooperation point which lies, with reference to said wick, on opposite sides of said actuating element.

66. The device according to claim 64, wherein said actuating element cooperation point is realized in each case on a free end region of a second L leg region of said first L leg and of said second L leg which projects in an angled manner from a first L leg region and/or in that said pivot point is realized and/or arranged on said first L leg and second L leg in a transition region between said first L leg region and said second L leg region.

67. The device according to claim 66, wherein said actuating lever, which is U shaped or which includes a U-shaped region, comprises a connection element which connects said first L leg and second L leg to form a U base.

68. The device according to claim 64, wherein said actuating element cooperation point is a slide guide where a journal on said actuating element side engages in a slide guide on said actuating lever side and is forcibly guided therein.

69. The device according to claim 64, wherein said at least one pivot point of said actuating lever, about which said lever is pivotable, is formed by a pivot bearing connection where said actuating lever is pivotably mounted indirectly or directly on said container or on a wick holding ring which is insertable into said container.

70. The device according to claim 53, wherein said displaceable clamping jaws are a constituent part of a shearing arrangement which comprises two clamping levers, which are pivotable relative to one another about at least one vertical pivot axis that is aligned in the direction of the wick axis and, in each case with reference to said pivot axis, and each realize or comprise on their one lever side assigned to the squeezing region of said wick in each case one of said clamping jaws, while their other lever side remote from the squeezing region of said wick realizes said actuating device or a constituent part of said actuating device.

71. The device according to claim 70, wherein said clamping levers are coupled with one another by way of a coupling device to cause said clamping levers to be displaceable together when they are activated, in particular displaceable about a common pivot axis as pivot joint.

72. The device according to claim 70, wherein said clamping lever is pretensioned into the home position by a pretensioning device being at least one spring element, so that said clamping levers and consequently the clamping lever-side clamping jaws are displaceable out of the home position into the squeezing position against a force of said pretensioning device.

73. The device according to claim 70, wherein said clamping levers are pivotably mounted directly or indirectly on said container or on a wick holding ring that is insertable into said container.

74. The device according to claim 40, wherein said wick is elastically deformable at least in the squeezing region of said wick such that the squeezing region of said wick returns into an original shape after being acted upon with a squeezing force and/or after being compressed.

75. The device according to claim 40, wherein a substance quantity conveyable in the direction of said substance dispensing region and/or a boost time is predefined by the squeezing force that can be output onto said squeezing region of said wick by way of said squeezing device, and wherein a squeezing force adjusting device is configured to enable adjustment of the squeezing force acting on said squeezing region.

76. The device according to claim 40, configured as a vaporizing device comprising a housing, in and/or on which the at least one heating element is arranged and/or to which the container is releasably connectable, wherein said container is releasably insertable into said housing.

77. A squeezing device for the device according to claim 40, the squeezing device comprising: at least one squeezing element for acting on, or compressing, an elastically deformable squeezing region of a wick, briefly and/or transiently, by way of a squeezing force.

78. A method for dispensing volatile substances, the method comprising: providing a container containing a substance to be dispensed and having at least one wick forming a capillary element in contact with the substance to be dispensed, the wick having a substance dispensing region, and wherein an optional heating element is provided and assigned to the wick; activating a squeezing device to elastically deform a squeezing region of the wick for a defined short period and/or transiently by subjecting the squeezing region to a squeezing force with at least one squeezing element of the squeezing device to thereby convey a defined substance quantity substantially in a direction of the substance dispensing region of the wick.

Description

[0047] The invention and its advantageous realizations and further developments are explained in more detail below by way of simply exemplary and schematic drawings, in which:

[0048] FIG. 1 shows schematically a schematic sketch of an exemplary embodiment according to the invention with a container, a wick arranged in the container projecting beyond the container by way of a free wick end, a heating element assigned to the free wick end and a squeezing device according to the invention.

[0049] FIG. 2 shows schematically an enlarged view of a detail of an exemplary embodiment of the squeezing device according to the invention,

[0050] FIG. 3 shows a schematic, perspective bottom view of the exemplary squeezing device according to the invention according to FIG. 2 without a wick,

[0051] FIGS. 4a, 4b shows schematically a schematic sketch, in which the functioning and operating method of the squeezing device according to the invention is explained in more detail as an example, FIG. 4a showing the non-actuated squeezing device whilst FIG. 4b shows the actuated squeezing device and

[0052] FIGS. 5a, 5b shows schematically a schematic sketch of an alternative embodiment with a clamping lever in a squeezing device comprising a shear arrangement, in which the functioning and operating method is explained in more detail as an example, FIG. 5a showing the non-actuated squeezing device whilst FIG. 5b shows the actuated squeezing device.

[0053] FIG. 1 shows schematically and as an example a schematic sketch of an exemplary embodiment of a device 1 according to the invention for dispensing, in particular for vaporizing, volatile substances, in particular fragrances and/or active agents. Said device 1 comprises a container 2 in which a substance 3 to be dispensed is received, for example in the form of a liquid.

[0054] A wick 4 as capillary element is inserted into the container and is in contact with the substance 3 to be dispensed, the wick 4 being inserted into a container opening 6 of the container 2 by means of a wick holding ring 5. Said wick holding ring 5 (see also FIG. 2) comprises a wick opening (not shown here) which surrounds the wick in a bearing connection.

[0055] As can be seen further from FIG. 1, the wick 4 projects beyond the container or the container opening 6 with a free wick end 7 which realizes a substance dispensing region or a substance outlet surface, via which the substance conveyed upward into the region of the free wick end 7 on account of the capillary action of the wick 4 is output into the surrounding area.

[0056] To increase the dispensing rate, at least one heating element 8, for example in the form of an electrical heating element, can be assigned to the free wick end 7, as shown purely schematically and by a dotted line in FIG. 1, by means of which heating element the free wick end 7 is heatable to increase the dispensing or vaporizing rate. The heating element 8 can be formed, for example, by a heating block or the like which comprises a recess, notch or through opening, into which the free wick end 7 projects at least with a part region.

[0057] The heating element 8 is regularly a constituent part of a vaporizing device which is only shown extremely schematically in FIG. 1, comprises a housing 37 which here is only shown schematically and sketched with a dotted line and into which the container 2 is insertable at least in regions, for example as shown in FIG. 1, can be screwed in by means of a thread 9. The substance can then escape or vaporize into the surrounding area (arrow 38) via at least one outlet opening provided in the housing, preferably in the region of the heating element 8 or of the free wick end 7.

[0058] In order to increase the dispensing rate or the vaporizing rate of the substance 3 briefly and to be able to obtain a boost effect, the device 1 is provided with a squeezing device 10, which is described in more detail below, by means of which a squeezing region 13 of the wick 4 (see FIGS. 4a, 4b in this connection) can be acted on or is compressible transiently by means of a squeezing force for a predetermined, defined short squeezing time such that a substance quantity, which is increased compared to a non-squeezed state, is conveyed in the direction of the free wick end 7 (boost effect).

[0059] The squeezing device 10, as can be seen, for example, from an overview of FIGS. 2, 3 and 4a to 4b, specifically comprises for this purpose a holding ring 11 as holder which comprises a wick through opening 12 via which the wick 4, as shown in FIG. 2 and FIGS. 4a and 4b, can be guided through or pushed through the holding ring 11 with its free wick end 7.

[0060] Multiple clamping jaws 14 are pivotably held on the holding ring 11 around the wick through opening 12 and consequently also around the squeezing region 13 of the free wick end 7 guided through the wick through opening 12. In the example case shown here, there are specifically four clamping jaws 14 (see FIG. 13) which are pivotably mounted on the holding ring 11 so as to pivot around the wick through opening 12, any other number also obviously being possible. Said clamping jaws 14 form a squeezing element of the squeezing device 10 and are pivotable here as an example in a joint region 15 (see FIG. 4a and FIG. 4b) about a horizontal axis aligned transversely to the direction of the wick axis or are connected in an elastically resilient manner to the holding ring 11 in such a manner that the clamping jaws 14 are pretensioned in the direction of their home position I shown in FIG. 4a, such that when there is a lack of force application from the squeezing device 10, the clamping jaws 14 are held in their home position I shown in FIG. 4a.

[0061] As can be seen in particular in FIG. 3, the individual clamping jaws 14 can comprise a substantially identical form here and are also spaced uniformly apart from one another.

[0062] An actuating device 16, by means of which the clamping jaws 14 are displaceable or pivotable out of their home position I shown in FIG. 4a into their squeezing position II shown in FIG. 4b, is provided for actuating the squeezing device 10. To this end, the actuating device comprises an actuating element which is realized here simply as an example by an actuating ring 17 which encompasses the clamping jaws in a ring-shaped manner in the home position I shown in FIG. 4a and/or in a manner abutting against the outside surface thereof remote from the wick 4.

[0063] FIG. 4a shows the actuating ring 17 in its initial position A, in which it does not exert any displacement force or any significant displacement force onto the clamping jaws 14. If the actuating ring 17, which can be realized, for example, from a rigid, non-elastic material, for example a plastics material, is then moved downward on actuation of the squeezing device 10 in a manner described in more detail below in arrow direction 18 along the outside surface of the clamping jaws 14 into the actuating position B shown in FIG. 4b, then the actuating ring 17 runs onto a displacement structure, realized here as an example by a ramp structure 19, as a result of which the clamping jaws 14 are pivoted about the joint region 15 in the direction of the squeezing region 13 of the wick 4 and, as shown purely in an extremely schematic manner in FIG. 4b, the squeezing region 13 is compressed or squeezed such that an increased substance quantity compared to the non-squeezed state (see arrow 20) is displaced briefly and in a boost-like manner substantially in the upward direction toward the free wick end 7.

[0064] A squeezing element contact surface 21, realized here simply as an example in a convex manner, with the clamping jaws 14 in said squeezing position II, causes the wick 4 to be acted upon in the squeezing region 13 by means of a force or force component 22 aligned obliquely upward substantially in the direction of the free wick end 7, which favors the boost-like concentration and accumulation of substance 3 in the free wick end 7.

[0065] The concave squeezing element contact surface 21 additionally causes the wick 4 to comprise a form here which tapers toward the direct contact region, in particular a form shown here which tapers downward in a cone-like manner in the wick squeezing region 13 and when viewed in the direction of the wick vertical axis, when the squeezing device is actuated, in the direct contact region between the squeezing element contact surface 21 and the wick 4. However, other forms can also be possible as an alternative to the convex design of the squeezing element contact surface, thus, for example, a concave or rectilinear form.

[0066] In particular, the form of the wick squeezing region 13 which tapers in a cone-like manner or obliquely downward promotes the boost effect because, as a result, the substance accumulated in the region of the wick or of the free wick end 7 is pumpable or conveyable upward in a targeted manner toward the widening free wick end 7.

[0067] If, as shown in FIG. 4a and FIG. 4b, the end face 24 connecting to the squeezing element contact surface 21 on the one side or the ramp structure 19 on the opposite side is flattened in a step-shaped manner, a wick region 23 which widens in a step-like or edge-like manner is produced, as can be seen in FIG. 4b, when viewed in the direction of the wick vertical axis below the direct contact region between the clamping jaws 14 and the wick 4, which wick region, on account of the abrupt transition from a constriction to a widening, can also promote the boost-like brief concentration for increasing the substance and the conveying thereof in the direction of the widening free wick end 7.

[0068] If an increased quantity of substance 3 to be dispensed is then situated in the region of the free wick end 7 due to the boost effect brought about by the squeezing device 10, more vaporization can then also be carried out there briefly, which results in the desired increased dispensing or vaporizing rate.

[0069] For displacing the actuating ring 17 between the initial position A and the actuating position B, the actuating device 16 further includes an actuating lever 25, which here is U-shaped purely as an example and comprises a first L leg 26 and a second L leg 27 which is spaced therefrom and is constructed in a substantially identical manner, the two legs being connected together by a U base 28 as connection element.

[0070] As can be seen in particular from the overall view of FIGS. 1 to 3, the two parallel extending first and second L legs 26, 27 lie on opposite sides of the wick 4 or of the container opening 6 and are pivotably hinged there in each case on the wick holding ring 5 at a pivot point 29 such that for actuating the actuating ring 17, the actuating lever 25 is pivotably hinged on the wick holding ring 5 and consequently indirectly on the container 2 so as to be pivotable by means of the two oppositely situated pivot points 29.

[0071] As can be seen further additionally from FIGS. 1 to 3, the two L legs 26, 27 each comprise on a free end region of a second L leg region 31, which projects in an angular manner from a first L leg region 30, in each case an actuating ring cooperation point which is realized as a slide guide 32, where a journal 33 on the actuating ring side engages in a slide guide 34 on the actuating lever side and is forcibly guided therein such that the actuating ring 17, when the actuating lever 25 pivots about the pivot points 29 which are located here, as an example, precisely in the transition region between the first L leg region 30 and the second L leg region 31, is displaced, as a result of the application of a force 35 (see FIG. 2) in a forcibly guided manner, by the slide guide 32 out of the initial position A shown in FIG. 4a into the actuating position B shown in FIG. 4b, such that, consequently, the clamping jaws 14 are also displaced out of their home position I shown in FIG. 4a into their squeezing position II shown in FIG. 4b (see also displacement arrow 18 in FIG. 2 in this respect).

[0072] If, after the boost brought about in this manner by the squeezing of the wick 4 in the wick squeezing region 13, the actuating lever 25 is released again, the squeezing region 13 is able to be restored and consequently released in various ways:

[0073] thus, on the one hand, as a result of the operator moving the actuating lever 25 back and, in addition to this or as an alternative to it, as a result of the elastic resilience of the wick squeezing region 13 and/or as a result of the elastically resilient connection of the clamping jaws 14 in the joint region 15 in such a manner that said clamping jaws 14, connected in an elastically resilient manner to the holding ring 11, move back again substantially automatically from the squeezing position II into the home position I and, as already stated, as a result of their elastically resilient connection, where the clamping jaws 14 are connected to the holding ring 11 pretensioned in the direction of the home position I. The restoring force would then have to be designed here such that the clamping jaws 14, in the event of a lack of force application on the actuating lever 25, could also transfer the actuating ring 17 automatically from the actuating position B into the initial position A.

[0074] As an alternative to the realization variant described here with an actuating ring 17 which is displaced along the outside surface of the clamping jaws 14 and is preferably produced from a solid, non-elastic material, the actuating ring 17 could also be produced from an elastic material. In said case, the actuating device 16, as only shown extremely schematically in FIG. 3 in connection with the force cooperation arrows 36, could then comprise an actuating element which cooperates with the journal 33 in the direction of the force cooperation arrow 36 and consequently decompresses the actuating ring 17 and stretches it such that said actuating ring exerts a displacement force onto the clamping jaws 14 in order to transfer them from their home position I into the squeezing position II. Were the journals 33 then to be released again, the elastic actuating ring 17 would move back automatically into its initial position and correspondingly bring about a return of the clamping jaws from the squeezing position II into the home position I, which can also be effected once again in the manner described previously, for example automatically as a result of the elastically resilient connection of the clamping jaws 14, pretensioned in the direction of the home position I, in the joint region 15 on the holding ring 11 and/or as a result of the elastic resilience of the wick squeezing region 13 and/or as a result of the operator moving the actuating ring 17 back.

[0075] FIGS. 5a and 5b show schematically a schematic sketch of an alternative embodiment of a clamping lever 39, 40 in a squeezing device 10 which comprises a shear arrangement, in which the modes of functioning and operating are explained in more detail, purely as an example. In this connection, FIG. 5a shows the non-actuated squeezing device 10, whilst FIG. 5b shows the actuated squeezing device 10.

[0076] The design of the device 1 can be fundamentally identical to that which has been described previously in connection with the realization variants described as an example, that is to say that the device 1, here too, comprises a container 2 in which a substance 3 to be dispensed, for example in the form of a liquid, is received.

[0077] A wick 4, as capillary element, is inserted into the container and said wick is in contact with the substance 3 to be dispensed, the wick 4 being inserted into a container opening 6 of the container 2 here by means of a wick holding ring 5. Said wick holding ring 5 (see also FIG. 2) comprises a wick opening which is not shown here and surrounds the wick in a bearing connection.

[0078] Here too, the wick 4 projects beyond the container or the container opening 6 by way of a free wick end 7 which realizes the substance dispensing region or a substance outlet surface, via which the substance conveyed upward on account of the capillary action of the wick 4 into the region of the free wick end 7 is dispensed into the surrounding area.

[0079] To increase the dispensing rate, at least one heating element 8, for example in the form of an electrical heating element, can be assigned, here too, to the free wick end 7, as shown purely schematically and by a dotted line in FIG. 1, by means of which heating element the free wick end 7 is heatable to increase the dispensing or vaporizing rate.

[0080] The heating element 8, here too, can also be a constituent part of a vaporizing device, only shown extremely schematically in FIG. 1, which comprises a housing 37 into which the container 2 is insertable at least in regions, for example as shown in FIG. 1 can be screwed in by means of a thread 9. The substance can then escape or vaporize into the surrounding area (arrow 38) via at least one outlet opening provided in the housing, preferably in the region of the heating element 8 or of the free wick end 7.

[0081] The difference to the embodiments described previously is in the specific design of squeezing device 10, the clamping jaws 14 of which are a constituent part of a shear arrangement which comprises two clamping levers 39, 40 which are pivotable relative to one another about a pivot axis 31, which realizes a pivot or rotary joint, preferably about a vertical axis as pivot axis which is aligned in the direction of the wick axis. Said clamping levers 39, 40 realize in each case one of the clamping jaws 14 on their first lever side 42, with reference to the pivot axis 41, which is assigned to the squeezing region 13 of the wick 4, whilst their second lever side 43, remote from the squeezing region 13 of the wick 4, realizes the actuating device or is at least a constituent part of an actuating device, which is, however, not shown any further here.

[0082] The clamping levers 39, 40 are pretensioned by means of a pretensioning device, formed here as an example by at least one spring element 44, into the home position I shown in FIG. 5a. In order to displace the clamping levers 39, 40 and consequently the clamping jaws 14 on the clamping lever side into the squeezing position II, the ends of the second lever side 43 have to be pivoted from the home position I into the squeezing position II against the force of the pretensioning device or of the spring element 44.

[0083] In a preferred manner, at the same time the pretensioning device also realizes a coupling device which ensures that the clamping levers 39, 40 are displaceable together.

[0084] In addition, the spring element 44 or the pretensioning device once again causes the clamping levers 39, 40 and consequently the clamping jaws 14 to return in a reliable manner to the home position I when the actuating device or the second lever side 43 of the clamping levers 39, 40 is no longer actuated or no longer acted upon by means of force.

[0085] Here too, it is once again provided in a preferred manner that the clamping levers 39, 40 are pivotably mounted indirectly or directly on the container 2 or on the wick holding ring 5 which is insertable into the container 2.

[0086] In the case of all embodiments described previously, it is provided that in the home position I, the clamping jaws 14 are at a defined gap clearance from the squeezing region 13 of the wick 4, as a result of which air is able to flow around the wick 4.