Filter for Cigarettes Made with Biological Material

Abstract

Filter for cigarettes made with biological material including a through separation structure (2) suitable for being coupled with a common paper for the production of cigarettes, the separation structure (2) forms compartments (3) suitable for the passage and filtration of the smoke, where this separation structure (2) is made of vegetable flour paste.

Claims

1. Filter for cigarettes made with biological material comprising a through separation structure coupled with a common paper for making cigarettes, said separation structure forming compartments adapted for the passage and filtration of smoke, wherein said separation structure is made with vegetable flour paste.

2. Filter according to claim 1, further comprising cotton, hemp or linen inserted in the compartments to retain more harmful substances.

3. Filter according to claim 1, wherein the separation structure, in cross section, is substantially S-shaped surrounded by a tubular element and formed by a single sheet of paste by folding and rolling said sheet.

4. Filter according to claim 3, wherein said S-shaped configuration of the separation structure extends in the center of the separation structure along the entire length of the filter.

5. Filter according to claim 1, further comprising a tubular element, and wherein said separation element, in cross section, is substantially M-shaped and is inserted inside the tubular element.

6. Filter according to claim 5, wherein the M-shaped configuration of the separation structure extends along the entire length of the filter.

7. Filter according to claim 1, wherein the separation element, in longitudinal section, has a wavy shape and holes that allow the passage of smoke.

8. Filter according to claim 7, further comprising a tubular element, and wherein the wavy shape of the separation structure is surrounded by the tubular element and extends along the entire length of the filter.

9. Filter according to claim 1, wherein the separation element is spiral-shaped and extends along the entire length of the filter.

10. Filter according to claim 1, wherein the filter is made from a single sheet of paste.

11. Filter according to claim 1, further comprising a tubular element surrounding said separation structure, and wherein the separation structure and the tubular element are made with vegetable flour paste.

12. Filter according to claim 11, wherein said vegetable flour paste include at least one of wheat flour, hemp flour, rice flour or Khorasan wheat flour.

Description

[0012] The characteristics and advantages of this invention will be clearer and more evident from the following, exemplary and non-limiting description of some embodiments with reference to the attached figures in which:

[0013] FIGS. 1a, 1b, 1c and 1d illustrate the preparation steps of a first embodiment of the filter according to the present invention;

[0014] FIG. 2 illustrates an axonometric view of the closed filter made according to the steps shown in FIGS. 1a-1d;

[0015] FIG. 3 illustrates a front view of the filter according to a second embodiment of the present invention;

[0016] FIG. 4 illustrates a longitudinal section of the filter according to a third embodiment of the present invention;

[0017] FIG. 5 illustrates a longitudinal section of the filter according to a fourth embodiment of the present invention.

[0018] With reference to the aforementioned figures, the filter, according to the present invention, comprises a through separation structure 2 which determines the formation of compartments 3 suitable for the passage and filtration of smoke.

[0019] Around this structure 2 there may also be a tubular element 4 that surrounds it.

[0020] The structure 2 and the tubular element 4 are of adequate dimensions to be coupled with a common paper for making cigarettes.

[0021] When the tubular element 4 is not present, the separation structure 2 is wrapped directly by the paper that is rolled up on it.

[0022] Both the tubular element 4 and the separation structure 2 are made by means of vegetable flour paste (for example, wheat flour, hemp flour, rice flour, Khorasan wheat flour or other suitable flour) which are able to retain harmful substances.

[0023] Advantageously, cotton, hemp or linen can be inserted in the compartments 3 to retain more harmful substances.

[0024] In the first embodiment illustrated in FIG. 2, the filter is made starting from a single sheet of paste 1 by rolling it on itself, as illustrated in FIGS. 1a-1d. In particular, it is sufficient to make a three-quarter fold of the sheet 1 and then roll the strip to form a tubular element. Thus, seen in cross section, a separation structure 2 is formed, substantially S-shaped and arranged in a central position with respect to the circumference of said sheet 1. This S shape preferably extends along the entire length of the filter.

[0025] The same shape can, however, be made by means of a mold.

[0026] In the second embodiment illustrated in FIG. 3, the separation structure 2, seen in cross section, is substantially M-shaped and is inserted inside the tubular element 4. This M shape extends preferably along the entire length of the filter.

[0027] In the third embodiment illustrated in FIG. 4, the separation structure 2, seen in longitudinal section, has a wavy conformation preferably for the entire length of the filter and is suitably provided with holes capable of allowing the passage of smoke. Said structure 2 with corrugated conformation is inserted inside the tubular element 4.

[0028] In a fourth preferred embodiment illustrated in FIG. 5, the separation structure 2 is spiral-shaped without an external tubular element whereby the smoke passes through said spiral.

[0029] The embodiments indicated above constitute the preferred embodiments, but it must be expressly understood that further modifications and variations may be made by those skilled in the art, without thereby departing from the scope of the present invention.