EP4152974A1

EP4152974A1 - Cigarette filter

Info

Publication number: EP4152974A1
Application number: EP21718552.9A
Authority: EP
Inventors: Fritz Schmitt
Original assignee: Beamax SA
Current assignee: ALIENWORKS S.A.
Priority date: 2020-05-18
Filing date: 2021-04-12
Publication date: 2023-03-29
Also published as: WO2021233608A1; EP4152978A1

Abstract

The invention relates to a cigarette filter (1) for filtering cigarette smoke. The cigarette filter (1) has an end piece (2) and a connection piece (3), wherein the end piece (2) is arranged at one end of the cigarette filter (1), and the connection piece (3) is arranged at the other end of the cigarette filter so that a fluid (4), in particular cigarette smoke, can be introduced into the cigarette filter (1) through the connection piece (3), can be guided through the cigarette filter (1) in a flow direction (D), and can be discharged out of the cigarette filter (1) through the end piece (2). The invention is characterized in that the cigarette filter (1) has at least one filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) through which the fluid (4) can flow in order to filter the fluid (4).

Description

Cigarette filters

The invention relates to a cigarette filter for filtering cigarette smoke, the cigarette filter having an end piece and a connecting piece, the end piece being arranged at one end of the cigarette filter and the connecting piece at another end, so that a fluid, in particular cigarette smoke, through the connecting piece in the cigarette filter can be introduced, can be passed through the cigarette filter in a flow direction and can be made from the cigarette filter through the end piece.

When tobacco is burned while smoking a cigarette, a large number of different undesirable pollutants arise, which can be present in the cigarette smoke in gaseous or solid form. These substances are harmful to humans; health problems and long-term damage as a result of tobacco consumption have long been known. Cigarettes therefore often have a cigarette holder in order to filter out the pollutants in the cigarette smoke as far as possible.

Known cigarette filters have a filter made of cellulose acetate threads or polymer threads which are wrapped in a filter paper. Usually several layers of threads are networked with one another or laid one on top of the other in order to increase the filter performance. Such a filter is known, for example, from EP 1366791 Ai.

However, the filtering effect of such known cigarette filters is limited. When tobacco is burned, a large number of different pollutants are produced cannot be reliably filtered out with the same filter. A relatively bulky filter is also necessary.

It is therefore the object of the present invention to provide a cigarette filter which has a good filter effect with a reduced filter volume.

This object is achieved by a cigarette filter with the features of claim 1. The dependent claims relate to advantageous embodiments.

The invention is characterized in that the cigarette filter has at least one filter disk through which the fluid can flow for filtering the fluid. The fluid can be an aerosol, in particular cigarette smoke. The filter disc enables a good filter effect with a low filter volume at the same time. The filter disk can be arranged between the connecting piece and the end piece.

The connecting piece and / or the end piece can be disk-shaped. The connecting piece and / or the end piece can have a diameter which can essentially correspond to the diameter of the filter disk. The cigarette filter can be connected, e.g. glued, to a cigarette via the connecting piece. The connecting piece and the end piece can be permeable to the fluid or the cigarette smoke. It can be provided that the connecting piece and / or the end piece do not filter the fluid.

The cigarette filter can have at least two filter disks, which can be arranged one behind the other in the direction of flow. The filter disks can be set up to filter different particles or solid or gaseous pollutants from the fluid. In this way, the cigarette filter can be modularly adapted to the substances to be filtered, or the filter discs can be selected accordingly. For example, depending on the type or amount of tobacco in a cigarette and any additives, the cigarette filter can be assembled or provided in a modular manner. In this way, various pollutants can be reliably filtered out by the various filter discs or the cigarette filter. However, it can also be provided that at least two or all of the filter disks are the same or filter out the same pollutants, so that one or more pollutants are filtered even more reliably. At least one of the filter disks can be or have a particle filter. At least one of the filter disks can be or have a smoke filter. The particle filter can be set up to filter particles such as solid pollutants from the fluid or the cigarette smoke. The smoke filter can be set up to filter gaseous pollutants from the fluid or the cigarette smoke. The pollutants may have been generated when tobacco was burned. Pollutants can be gaseous or solid in the fluid or cigarette smoke. Pollutants can include, in particular, carcinogenic substances, (blood) toxic substances, neurotoxic substances, irritating substances, soot, tar, nitrosamines, aromatic or polycyclic hydrocarbons, carbon monoxides, nitrogen oxides, toxic heavy metals such as cadmium, benzene, benzopyrene or the like, or other The combustion of tobacco can be harmful to humans.

The particle filter can be arranged upstream of the smoke filter in the direction of flow. Solid particles can thus first be filtered from the fluid or the cigarette smoke, so that clogging or clogging of the smoke filter by solid pollutants or particles can be prevented or reduced.

The filter disks can be arranged in the direction of flow with decreasing particle filter size. For example, if the cigarette filter has a first filter disk for filtering particles with a diameter of 10 µm (PMio) and a second filter disk for filtering particles with a diameter of 5 µm (PM5), the first filter disk can be in front of the second filter disk in the direction of flow be arranged. By filtering the largest particles before filtering the smaller particles, clogging or clogging of the downstream filters in the flow direction can be prevented or reduced. Depending on the filter, particles smaller than 2.5 pm (PM2.5) or smaller than 1 pm (PMi) can also be filtered out of the fluid. The filter disk can be set up to filter out particles with a diameter smaller than 2.5 μm or smaller than 1 μm from the fluid.

At least two or in each case two filter disks arranged one behind the other in the direction of flow can be separated by a cavity. The respective filter disks can be spaced from one another accordingly. An active ingredient can be received in the cavity. The active ingredient can be or have a flavoring substance. When the fluid flows through the cavity, the active ingredient can be added to or mixed with the fluid. The filter disks can be set up to allow the active substance to pass through.

Alternatively or additionally, a molecular sieve can be accommodated in the cavity. The molecular sieve can preferably be or comprise a zeolite. The molecular sieve can have microspheres. The microspheres can be coated with silver, brass, steel wool and / or brass wool. As an alternative or in addition, activated carbon can be accommodated in the cavity.

At least one filter disk can be or have a molecular sieve. The molecular sieve can preferably be formed by microspheres or have microspheres. The microspheres can be arranged in a cavity of the filter disk through which a flow can flow. The microspheres can comprise or consist of a zeolite. The microspheres can be coated with silver, brass, steel wool and / or brass wool. The filter disc can thus be a smoke filter or serve to filter gaseous pollutants. As an alternative or in addition, activated carbon can be arranged in the hollow space of the filter disk through which a flow can flow.

The filter disk can be folded, so that the filter disk can have a ratio of folded surface to non-folded surface greater than 10. The filter disk can preferably have a ratio of greater than 20. The filter disk can particularly preferably have a ratio of greater than 40. The unfolded surface can correspond to a projection of the filter disk or a reference surface, ie have an area of A = p * r ² , where r can be the radius of the filter disk. The filter disc can have a diameter of 8 mm ² . The filter disk can have a diameter which can essentially correspond to the diameter of a commercially available or known cigarette.

The folding can result in a good filter effect with a lower height of the filter disc. In particular, the cigarette filter according to the invention can thus be shorter than known cigarette filters with the same filter performance.

The filter disk can have at least one fold. The space formed by the fold can be at least partially filled with a foam. The foam can preferably have or be a silicone foam. The foam or the Silicone foam can bind pollutants. The filter disk can have at least two folds, which can be arranged to run radially or parallel to one another. The folded filter disc can be a smoke filter or serve to filter gaseous pollutants, or it can also be a particle filter or serve to filter solid pollutants.

The filter disk can have an activated carbon or consist of activated carbon. For example, the filter disk can consist of or have pressed activated carbon. The filter disc can thus be a smoke filter or serve to filter gaseous pollutants.

The filter disk can have cilia, which can be arranged on a base surface of the filter disk. The base area or the base body can be permeable to the fluid. The cilia can be arranged more or less densely depending on the pollutant to be filtered. The filter disc can serve as a particle filter, for example, or the cilia filter solid pollutants or particles from the fluid. However, it can also be provided that the cilia can also filter gaseous pollutants.

The filter disk can have a honeycomb body with throughflow channels arranged in parallel. The throughflow channels can preferably be arranged essentially parallel to an axis of symmetry of the filter disk. The flow channels can be coated with a catalytic material on an inner side or inner wall or have such a material. The catalytic material can be or comprise a catalytic metal such as platinum.

The filter disk can be coated with a catalytic material, preferably a catalytic metal. The catalytic metal can be or comprise platinum. The filter disk can, for example, be coated on a surface through which the fluid can flow.

The filter disc can be statically charged. In this way, the filter disc can bind particles and / or solid pollutants or filter them out of the fluid. The end piece and / or the connecting piece can be or have a filter disk. The filter disk can be or have one of the filter disks described above. If the end piece and / or the connecting piece is a filter disk, then in one embodiment it can be provided that the cigarette filter does not have any further filter disk between the connecting piece and the end piece.

The cigarette filter can have a support film which can fix the filter disk relative to the end piece, connecting piece and / or further filter disks. The end piece, connecting piece and / or the filter disc can be glued to the support film, for example. The end piece, connection piece and / or filter disc can be connected to the support film in such a way that fluid or cigarette smoke flowing through the cigarette filter cannot flow between the end piece and support film, connection piece and support film and / or filter disc and support film, but through the end piece, connection piece and / or Filter disk must flow. In other words, the end piece, connecting piece and / or filter disk can be connected to the support film in a fluidically tight manner. The support film can form an outer wall of the cigarette filter. The support film can be wound cylindrically around the end piece, connecting piece and filter disc, and / or form a cylindrical outer wall or outer side of the cigarette filter.

It can be provided that the cigarette filter can have at least one support element, which can be connected, preferably glued, to the support film. The support element can be ring-shaped or disk-shaped. The support element can be permeable to the fluid so that the fluid can flow through the support element without being filtered. The support element can have a diameter which can essentially correspond to the diameter of the filter disk, the connecting piece and / or the end piece. The mechanical stability of the cigarette filter can be increased by the support element and / or bending of the support film can be reduced or completely prevented. Some embodiments may not include a support member. For example, depending on the material of the support film and / or the distance between the filter disk or filter disks, connecting piece and end piece, there may be little or no deflection of the support film.

The connecting piece can be or have the support film. The support film can be glued or glued to a cigarette. The support film can be or have the connecting piece. For example, the support film can be a receptacle for a Make cigarette. If the support film is the connecting piece, then the support film can protrude over one or the filter disk, so that the cigarette filter can be connected to a cigarette through the support film or can be attached to a cigarette. As an alternative or in addition, the support film can protrude beyond the connecting piece, so that the cigarette filter can be connected to a cigarette via the support film or can be attached to a cigarette. This can result in a good and secure connection between the cigarette filter and the cigarette.

The support film can have a reservoir in which an active ingredient can be accommodated, so that the active ingredient accommodated in the reservoir can be delivered to the fluid flowing through the cigarette filter. The active ingredient can preferably be or have a flavoring substance.

The support film can have a heating element. The heating element can preferably be or have a heating wire or a printed heating unit. The printed heating unit can be printed on the support film.

The heating unit can be set up to heat the reservoir and / or the active substance taken up in the reservoir.

The invention is explained further with reference to the following figures. 1 shows an embodiment of a cigarette filter according to the invention in a sectional view;

FIG. 2 shows the embodiment of a cigarette filter according to the invention shown in FIG. 1 in a different sectional view;

3 shows a further embodiment of a cigarette filter according to the invention in a schematic representation;

4 shows four different embodiments of filter disks according to the invention in a perspective view; 5 shows three further different embodiments of the invention

Filter disks in perspective view;

6 shows yet another embodiment of an inventive

Filter disc in a cross-sectional view; and

7: an embodiment of a support film according to the invention.

An embodiment of a cigarette filter 1 according to the invention is shown in FIGS. 1 and 2 in a perspective sectional view. The cigarette filter 1 has an end piece 2, a connecting piece 3 and at least one filter disk 5, 6, 7, 8, 9, 10, 11, 12, 13. Obviously, the cigarette filter 1 can also have only one filter disk. However, it can also be provided that the cigarette filter 1 can have up to twenty filter disks in one embodiment. The number of filter disks can be selected depending on the desired filter effect. The filter disks 5, 6, 7, 8, 9, 10, 11, 12, 13 are further described below with reference to FIGS. 4, 5 and 6. The filter disks 5, 6, 7, 8, 9 shown in FIGS. 1 and 2 are merely exemplary; the invention and the exemplary embodiment are not restricted to these filter disks and not to such an arrangement of the filter disks. The end piece 2 can be arranged at one end of the cigarette filter 1, the connecting piece 3 at an opposite end of the cigarette filter 1 and the filter disc between the end piece 2 and the connecting piece 3. Cigarette filter 1 can be connected to a cigarette 200. A fluid 4 to be filtered, in particular cigarette smoke, can enter the cigarette filter 1 through the connecting piece 3, for example by pulling on the cigarette when smoking the cigarette. The end piece 2 and the connecting piece 3 can be permeable to the fluid 4. The fluid 4 can be passed through the filter disk and filtered. The filter disk can be set up to filter out particles, solid pollutants and / or gaseous pollutants from the fluid 4 or the cigarette smoke. The fluid 4 can then exit the cigarette filter 1 through the end piece 2. The connecting piece 3 and / or the end piece 2 can be or have a filter disk. The end piece 2 can be or have a mouthpiece. The connecting piece 3 and / or the end piece 2 can be disc-shaped or ring-shaped. The connecting piece 3 can be set up to be connected, in particular glued, to the cigarette 200, or to connect or glue the cigarette filter 1 to the cigarette 200. It can be provided that the End piece 2, the connecting piece 3 and / or the filter disk have essentially the same diameter.

The cigarette filter 1 can have more than one filter disc. If the cigarette filter 1 has more than one filter disk, the filter disks can be different from one another. For example, a first filter disk can filter particles with a particle size greater than PM10 or be impenetrable for them, while a second filter disk can filter particles with a particle size greater than PM5 or be impenetrable for them. A third filter disc can, for example, filter particles with a particle size larger than PM2.5 or be impenetrable for them. It can be provided that the filter disks are arranged in the flow direction in such a way that particles with a smaller particle size are filtered out of the fluid 4 one after the other. For example, a filter disk for filtering PM10 in flow direction D can be arranged in front of a filter disk for filtering PM5, and this possibly in flow direction D in front of a filter disk for filtering PM2.5.

If the cigarette filter 1 has more than one filter disk, it can be provided that at least two of the filter disks are arranged at a distance from one another, so that a cavity 14 can be formed between the respective filter disks. It can be provided that an active substance is received in the cavity 14. The active ingredient can be or have, for example, a flavoring agent or other known additives. When the fluid 4 flows through the cavity 14, the active ingredient can be absorbed by the fluid 4 or added or mixed with it. The filter disk or filter disks can be permeable to the active substance or be designed not to filter the active substance out of the fluid 4. As an alternative or in addition, activated carbon can be accommodated in the cavity 14.

Depending on the type of filter disk, it can be set up to filter out certain pollutants, gases and / or particles contained in the fluid 4. A desired filter effect can be set by means of a suitable combination of different filter disks. For example, a first filter disk can filter soot, whereas a second filter disk can filter, for example, tar or other pollutants generated during tobacco combustion. If the cigarette filter has at least two filter discs, a first filter disc of which is a smoke filter can be or can serve to filter gaseous pollutants, and a second filter disk can be a particle filter or can serve to filter solid pollutants and / or particles, the second filter disk can be arranged in flow direction D in front of the first filter disk.

The cigarette filter 1 can have a support film 100. The end piece 2, connecting piece 3 and the filter disk can be connected to the support film 100, preferably glued. The support film 100 can fix the end piece 2, connecting piece 3 and the filter disk relative to one another. If the cigarette filter 1 has more than one filter disk, the support film 100 can fix the filter disks relative to one another. It can be provided that the support film 100 protrudes beyond the connecting piece 3 in such a way that the support film 100 makes contact with an outside of the cigarette 200 and can be connected, e.g. glued, to it. The connection between the connector 3 and the cigarette 200 can thus be strengthened. It can be provided that the support film 100 can alternatively be or have the connecting piece 3.

It can be provided that the cigarette filter 1 is assembled by a smoker when rolling a cigarette 200. In this case, the smoker can flexibly use or provide those filter disks in the cigarette filter 1 that are necessary for suitable filtering of the cigarette smoke of the cigarette 200 he has put together individually, e.g. depending on the amount and type of tobacco and any additives. The cigarette filter 1 allows a modular construction or assembly. However, it can also be provided that the cigarette filter 1 is manufactured industrially or in a factory and is already ready-made for connection to a hand-rolled cigarette or as an intermediate product in cigarette production. The cigarette filter 1 can be tailored to the amount or type of tobacco or other ingredients or additives.

FIG. 3 schematically shows a further embodiment of a cigarette filter 1 according to the invention. The embodiment shown in FIG. 3 can have several or all of the features of the embodiments described with reference to FIGS. 1 and 2. In this case, reference is made to the corresponding text passages in the above description of FIGS. 1 and 2 with regard to these features. The filter disks 5, 6, 7, 8, 9, 12 shown in FIG. 3 are merely exemplary; the invention and the exemplary embodiment are not restricted to these filter disks and not to such an arrangement of the filter disks. The cigarette filter 1 of FIG. 3 can have a molecular sieve 15 accommodated in a cavity 14. The cavity 14 can be arranged between two filter disks and / or between the filter disk and the end piece 2, the filter disk and the connecting piece 3 or the end piece 2 and the connecting piece 3. The molecular sieve 15 can have natural and / or synthetic zeolites and / or carbons. The molecular sieve 15 can have a high adsorption capacity for gases, vapors and dissolved substances with certain molecular sizes, in particular a high adsorption capacity with regard to gases or pollutants contained in the fluid 4 or cigarette smoke. The filter disks can be arranged or spaced apart from one another in such a way that the volume of the molecular sieve 15 accommodated in the cavity 14 is sufficient to absorb the pollutants or at least selected pollutants that arise when the tobacco of the cigarette 200 is burned. The molecular sieve 15 can filter out pollutants from the fluid 4, in particular gaseous pollutants. The molecular sieve 15 can have or consist of microspheres. The microspheres can be coated, for example with silver, brass, steel wool or brass wool.

It can be provided that the embodiment of the cigarette filter 1 shown and described in FIGS. 1 and 2 can also have a molecular sieve 15, which can be arranged in a cavity 14, for example.

As shown in FIG. 3, the connecting element 3 can be disk-shaped and connected to the cigarette 200, so that the cigarette filter 1 can be connected to the cigarette 200 via the connecting element. The connecting element 3 can be glued to the cigarette 200, for example. However, the connecting piece can also have a different geometric shape, for example ring-shaped, elliptical, cuboid, polygonal or the like.

FIGS. 4 to 6 show embodiments of filter disks 5, 6, 7, 8, 9, 10, 11, 13. The filter disks 5, 6, 7, 8, 9, 10, 11, 13 can have a diameter of approximately 8 mm to have. The diameter can essentially correspond to the thickness of a commercially available cigarette 200.

As shown in FIG. 4, the filter disk 5, 6, 10, 11 can be folded and / or have at least one fold 18. By folding the filter disk 5, 6, 10, 11, its surface can be compared with the surface of an unfolded filter disk or reference area be enlarged. The term “reference surface” can in particular mean a circular disk with an area A = p * r ² , where r is the radius of the circular disk or the filter disk. The surface of the filter disk 5, 6, 10, 11 is preferably folded in such a way that, with a diameter of 8 mm, it can have a filter area of approximately 2 to 4 cm ² or higher. In particular, the filter disk 5, 6, 10, 11 can have a ratio of folded surface to unfolded surface (or reference surface) greater than 10, preferably greater than 20 and particularly preferably greater than 40. It can be provided that the cigarette filter 1 has more than one folded filter disk 5, 6, 10, 11 so that the total filter area of all folded filter disks 5, 6, 10, 11 can total 40 cm ² or more. Good filtering can thus be achieved.

As shown in FIG. 4, the filter disk 5, 6, 10, 11 can have more than one fold 18, so that in some embodiments the filter disk 5, 6, 10, 11 can only have a small height despite a large surface and thus good filtering. The cigarette filter 1 can thus have a short length with good filtering or be shorter compared to known cigarette filters. The fold 18 can, for example, be round, triangular, rectangular, trapezoidal or the like or have corresponding shapes. The filter disk 5, 6, 10, 11 can have a filter paper or consist of filter paper.

The cigarette filter 5, 6, 10, 11 can have at least two folds 18. The folds 18 of the cigarette filters 5, 6 can extend radially or be arranged to one another. The folds 18 of the cigarette filters 10, 11 can extend or be arranged parallel to one another, preferably perpendicular to an axis of symmetry of the filter disk 10, 11. Due to the radial arrangement of the folds 18 of the filter disk 5, 6, the fluid 4 flowing through the filter disk 5, 6, e.g. cigarette smoke, can be filtered uniformly well and in particular independently of the angle. The folds 18 arranged in parallel enable the filter disks to be manufactured in a particularly simple manner.

It can be provided that the fold 18 of the filter disk 6, 11, or the free space formed by the fold 18, can be at least partially filled with a foam 19. The foam 19 can be or have a silicone foam, for example. Depending on the mixture and composition of the foam 19 and / or the silicone foam, the foam 19 or the silicone foam can bind harmful substances contained in the fluid 4, for example harmful substances contained in cigarette smoke. The filter disk 5, 6, 10, 11 can have a filter edge. The filter edge can consist of or have cellulose, for example. The filter edge can be used to fix the fold 18 and / or stiffen the filter disk 5, 6, 10, 11. The filter disk 5, 6, 10, 11 can in particular filter solid pollutants or particles, but also gaseous pollutants from the fluid 4.

FIG. 5 shows three further embodiments of a filter disk 7, 8, 9. The filter disk 7 can have activated carbon 20 or consist of activated carbon 20. The activated carbon 20 can be compressed. For example, the filter disk 7 can consist of compressed activated carbon 20. By means of the activated carbon 20, the filter disk 7 can, for example, filter out aromatic or polycyclic hydrocarbons from the fluid 4 or the cigarette smoke. The filter disk 7 can in particular filter out gaseous pollutants from the fluid 4.

Another embodiment of a filter disk 8 can have a base 22 and cilia 21. The cilia 21 can be arranged on a surface of the base area 22. The base area 22 can be permeable to the fluid 4 or cigarette smoke. The cilia can be arranged more or less densely depending on the particles or pollutants to be filtered. It can be provided that the cilia 21 can filter solid pollutants, particles, tar, soot and the like from the fluid 4 or that these remain caught in the cilia 21. The cilia 21 can alternatively or additionally also filter other pollutants.

Another embodiment of a filter disk 9 can have a honeycomb shape 23. The honeycomb shape 23 can have a plurality of throughflow channels or fluid channels that are arranged essentially parallel to one another and extend in the flow direction through the filter disk 9 or consist of such. The cross section of the fluid channels can be selected to be suitable in order to filter the fluid flowing through the filter disk 9. Alternatively or additionally it can be provided that the fluid channels are coated on an inside with a catalytic material or catalytic metal, e.g. platinum or the like.

Yet another embodiment of a filter disk 13 is shown in FIG. A molecular sieve 24, for example having microspheres 24, can be accommodated in a cavity 16 of the filter disk 13. The outer wall 17 of the cavity 16 can be used for the fluid 4 may be permeable, so that the fluid 4 or cigarette smoke can enter the cavity 16, filtered through the molecular sieve or the microspheres 24 and exit again through the opposite outer wall. The microspheres 24 can comprise or consist of a zeolite. The microspheres 24 can be coated with silver, brass, steel wool and / or measure wool. Alternatively or additionally, activated carbon can be received in the cavity 16. In particular, gaseous pollutants can be filtered out of the fluid by the molecular sieve and / or the activated carbon.

Obviously, a filter disk can also have a combination of some, several or all of the features described with reference to the filter disks 5, 6, 7, 8, 9, 10, 11, 13 or be formed by a corresponding combination.

The filter disk 5, 6, 7, 8, 9, 10, 11, 12, 13 can consist of a biodegradable material or have such a material. The filter disk 5, 6, 7, 8, 9, 10, 11, 12, 13 can preferably be completely decomposed to the point of mineralization, so that the organic compound can be broken down into inorganic substances such as carbon dioxide, oxygen and ammonia, for example. The filter disk 5, 6, 7, 8, 9, 10, 11, 12, 13 can be made of fabric, metal, ceramic, clay, mushrooms, moss, plastic and / or a membrane.

The filter disk 5, 6, 7, 8, 9, 10, 11, 12, 13 can be coated and / or impregnated. At least one outer surface of the filter disc 5, 6, 7, 8, 9, 10, 11, 12, 13 can be coated, for example with a metal. The metal can be a catalytic metal.

The filter disk 5, 6, 7, 8, 9, 10, 11, 12, 13 and / or the filter material of the filter disk can be statically charged. The static charge can take place e.g. chemically, e.g. by impregnating the filter material accordingly. Alternatively or additionally, the filter disk 5, 6, 7, 8, 9, 10, 11, 12, 13 and / or the filter material can be electrostatically charged or have an electrostatic charge. The static charge can bind particles and / or pollutants to the filter material or the filter disc.

FIG. 7 shows an embodiment of a support film 100. As shown in FIGS. 1 and 2, the support film 100 can form an outside of the cigarette filter 1. The support film loo can for example consist of a paper material, a cellulose or a suitable plastic or have such a material, or have a carrier material made of a paper material, a cellulose or a suitable plastic. The support film loo can be set up to be connected, preferably glued, to the end piece 2, the connecting piece 3, filter disks, support elements and / or the cigarette 200. The support film 100 can be perforated or have a perforation so that air from the surroundings can enter the cigarette filter 1 through the perforation.

The support film 100 can have at least one reservoir 101. An active ingredient, for example a flavoring substance, can be accommodated in the reservoir 101. When the fluid 4 flows through the cigarette filter 1, provision can be made for the active substance or flavoring substance received in the reservoir 101 to be released into the fluid 4 or mixed with the fluid 4. In this case, the filter disks can be set up in such a way that they are permeable to the active substance or flavoring substance. The reservoir 101 can, for example, be suitably opened to a cavity 14 of the cigarette filter 1, have a corresponding perforation or have a suitably arranged permeable membrane. The flavoring substance can be or have, for example, sweet, sour, salty, bitter, umami or a mixture thereof.

The support film 100 can have a heating element 102. The heating element 102 can be, for example, or comprise a heating wire. The heating element 102 can be arranged on or in the support film 100 and / or designed so that the fluid 4 flowing through the cigarette filter 1 can be heated by the heating element 102. As an alternative or in addition, the heating element 102 can be on or in the support film in this way

100 or the reservoir 101 and / or be set up to heat the active ingredient or flavoring substance received in the reservoir 101 or to initiate or promote or facilitate its delivery to the fluid 4 flowing through the cigarette filter 1. For example, a point between the reservoir 101 and the cavity 14 can be thermally opened when heated by the heating element 102. Alternatively or additionally, the pressure within the reservoir can be increased by heating the active ingredient or flavoring substance received in the reservoir 101

101 can be increased so that the active ingredient or flavoring substance absorbed therein can enter the cavity 14, for example through the membrane or perforation. Alternatively or additionally, the membrane's permeability can be increased by heating it increase. The heating element 102 can be printed onto the support film 100 and / or the carrier material.

It can be provided that the support film 100 or the cigarette filter 1 can have an energy store 103 for supplying energy to the heating element 102. The energy store 103 can store electrical energy, for example.

Support film 100 or the cigarette filter 1 can have a receiving and transmitting unit 104, for example a radio interface. The support film 100 or the cigarette filter 1 can have a programming block 105. The support film 100 or the cigarette filter 1 can have a control unit 106 for controlling the heating element 102. It can be provided that the control unit 106 can receive control signals via the receiving and transmitting unit 104 and / or send status information relating to the control. It can be provided that the control unit 106 can be controlled via the programming block 105. The programming block 105 can have, for example, a button or a sliding element. Programming block 105 can be arranged on an outside of the support film or of the cigarette filter 1.

The features disclosed in the description, the figures and the claims can be essential for realizing the invention individually or in any combination.

List of reference symbols:

1 cigarette filter

2 connector

3 end piece

4 fluid

5 filter disc

6 filter disc

7 filter disc

8 filter disc

9 filter disc

10 filter disc

11 filter disc

12 filter disc

13 filter disc

14 cavity

15 molecular sieve

16 cavity

17 outer wall

18 folding

19 foam

20 activated carbon

21 cilia

22 base area

23 honeycomb shape

24 microspheres

100 support film

101 reservoir

102 heating element

103 Energy storage

104 Receiver and transmitter unit

105 programming block

106 control unit

200 cigarette

D direction of flow

Claims

1. Cigarette filter (l) for filtering cigarette smoke, the cigarette filter

(1) has an end piece (2) and a connecting piece (3), the end piece

(2) is arranged at one end and the connecting piece (3) is arranged on another end of the cigarette filter (1), so that a fluid (4), in particular cigarette smoke, can be introduced through the connecting piece (3) into the cigarette filter (1), in a flow direction (D) through the cigarette filter (1) and through the end piece (2) from the cigarette filter (1), characterized in that the cigarette filter (1) at least one filter disc (5) through which the fluid (4) can flow 6, 7, 8, 9, 10, 11, 12, 13) for filtering the fluid (4).

2. Cigarette filter (1) according to claim 1, which has at least two filter discs (5, 6, 7, 8, 9, 10, 11, 12, 13) which are arranged one behind the other in the flow direction (D) and are preferably located in at least one Differentiate filter properties from one another.

3. Cigarette filter (1) according to claim 2, in which at least one of the filter disks (5, 6, 7, 8, 9, 10, 11, 12, 13) is or has a particle filter, and at least one of the filter disks (5, 6 , 7, 8, 9, 10, 11, 12, 13) is or has a smoke filter.

4. cigarette filter (1) according to claim 3, wherein the particle filter is arranged in the flow direction (D) in front of the smoke filter.

5. Cigarette filter (1) according to one of the preceding claims, in which the filter discs (5, 6, 7, 8, 9, 10, 11, 12, 13) are arranged in the flow direction (D) with decreasing particle filter size.

6. Cigarette filter (1) according to one of the preceding claims, in which at least two or in each case two filter disks (5, 6, 7, 8, 9, 10, 11, 12, 13) arranged one behind the other in the flow direction (D) through a cavity ( 14) are separate.

7. cigarette filter (1) according to claim 6, wherein an active ingredient is received in the cavity (14).

8. Cigarette filter (1) according to claim 6 or 7, in which a molecular sieve (15), preferably a zeolite, is received in the cavity (14).

9. Cigarette filter (1) according to one of the preceding claims, in which at least one filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) is or has a molecular sieve, which is preferably formed by microspheres (24) is.

10. Cigarette filter (1) according to claim 9, in which the microspheres (24) are arranged in a through-flow cavity (16) of the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13).

11. Cigarette filter (1) according to one of claims 9 to 10, in which the microspheres (24) have a zeolite or consist of it.

12. Cigarette filter (1) according to one of claims 9 to 11, in which the microspheres (24) are coated with silver, brass, steel wool and / or brass wool.

13. Cigarette filter (1) according to one of the preceding claims, in which the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) is folded so that the filter disc (5, 6, 7, 8 , 9, 10, 11, 12, 13) has a ratio of folded surface to unfolded surface greater than 10, preferably greater than 20 and particularly preferably greater than 40.

14. Cigarette filter (1) according to one of the preceding claims, in which the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) has at least one fold (18).

15. Cigarette filter (1) according to claim 14, wherein the space formed by the fold (18) is at least partially filled with a foam (19), preferably a silicone foam.

16. Cigarette filter (1) according to one of claims 14 to 15, in which the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) has at least two folds (18) which run radially or parallel are arranged to each other.

17. Cigarette filter (1) according to one of the preceding claims, in which the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) has an activated carbon (20) or consists of activated carbon (20).

18. Cigarette filter (1) according to one of the preceding claims, wherein the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) has cilia (21), the cilia (21) on a base (22) of the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) are arranged.

19. Cigarette filter (1) according to one of the preceding claims, in which the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) has a honeycomb body (24) arranged in parallel, preferably parallel to an axis of symmetry of the Has filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) arranged, through-flow channels.

20. Cigarette filter (1) according to one of the preceding claims, in which the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) is coated with a catalytic material, preferably a catalytic metal.

21. Cigarette filter (1) according to one of the preceding claims, in which the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) is statically charged.

22. Cigarette filter (1) according to one of the preceding claims, in which the end piece (2) and / or the connecting piece (3) one or the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) is or has.

23. Cigarette filter (1) according to one of the preceding claims, which has a support film (100) which holds the filter disc (5, 6, 7, 8, 9, 10, 11, 12, 13) relative to the end piece (2), Connection piece (3) and / or at least one further filter disk (5, 6, 7, 8, 9, 10, 11, 12, 13) fixed.

24. Cigarette filter (1) according to claim 22, wherein the support film (100) forms an outer wall of the cigarette filter (1).

25. Cigarette filter (1) according to one of claims 23 to 24, in which the connection piece (3) is or has the support film (100) and / or the support film (100) protrudes over the connection piece (3) so that the cigarette filter (1) can be connected to a cigarette (200) via the support film (100) or can be attached to a cigarette (200).

26. Cigarette filter (1) according to one of claims 23 to 25, in which the support film (100) has a reservoir (101) in which an active ingredient, preferably a flavoring substance, is received, so that the one received in the reservoir (101) Active substance can be delivered to the fluid (4) flowing through the cigarette filter (1).

27. Cigarette filter (1) according to one of claims 23 to 26, in which the support film (100) has a heating element (102), preferably a heating wire or a printed heating unit.

28. Cigarette filter (1) according to claim 27, in which the heating unit is set up to heat the reservoir (101) and / or the active substance contained in the reservoir (101).