JP5607544B2 - Cigarette smoke filter - Google Patents

Description

  The present invention relates to filters and filter elements for smoking articles such as cigarettes.

  It is desirable to include particulate additives such as activated carbon in the cigarette filter as a means of changing the nature of the smoke. However, if particulate additives are visible at the mouth end of the filter, it is uncomfortable to see, and furthermore, such exposed additives can impart a harmful taste to the filter when applied to the mouth. is there. It is customary to use two or more filter portions that are aligned longitudinally along the length of the filter to prevent the particles from being seen at the mouth end. In such filters, the mouth end portion generally comprises a white fibrous material (typically cellulose acetate), and the tobacco end portion is (eg, between the mouth end portion and the third tobacco end portion). It contains granular additives in the granular bed (interposed) or includes granular additives embedded in the fibrous base material. Each of these types of filters, known as “Triple Granular” or “Active Acetate Duals”, are well known in the prior art. These multi-part filter products have the disadvantage that multiple separate steps are required to produce the final filter, i.e. each base rod type continuous rod is manufactured separately. The base rod elements are substantially cut and joined in a separate step with a selected alignment. This can result in increased process complexity and increased manufacturing costs for filters incorporating particulate additives.

  In order to overcome these disadvantages, Applicants have previously developed a process in which a particle-carrying cigarette filter having at least one end that does not contain additives can be produced in a single step. GB 2261152 describes a cigarette filter wound with a wrapping paper having a particulate additive adhered to a portion of the radially inner surface of the wrapping paper, wherein one or both exposed ends of the wrapping paper are described. Does not contain any additives. This is known as an “Active Patch” filter. EP 1827144 describes the process of pneumatically injecting a local mass of particulate additive, said mass being embedded in a continuously manufactured filter rod. Along the rods are arranged at intervals in the vertical direction. The resulting product is known as a “Pod” filter.

  The limitation associated with these two steps is that the upper limit of the amount of particulate additive that can be incorporated into the filter is greater than the upper limit of the amount of particulate additive that can be achieved in a conventional composite partial filter having similar dimensions. Is also low.

  It is also desirable to include one or more additives in the filter. Inclusion of one or more additives in the filter includes, for example, a conventional “triple granular” by using one additive in the granular bed and another additive embedded in the upstream portion of the filter material. Can easily be achieved with a filter. However, the limitations associated with single-step “active patch” and “pod” filters are that one or more in the filter, unless the additive material comprises a homogeneous mixture of two or more additives having similar physical properties. It is not possible to incorporate other additives.

  Accordingly, it has a cigarette filter having at least one unexposed end of the additive and incorporating at least two particulate additives in separate locations that can be manufactured in a single pass process. It is desirable.

  According to the present invention, it is provided with a longitudinally extending core of tobacco smoke filtering material, and a wrapping paper engaged around the core, and the longitudinally extending core is at least completely enclosed in the interior thereof. The wrapping paper has a second (for example, particulate) additive affixed to one or more portions of its radially inner surface, and the wrapping paper at one end A cigarette smoke filter or filter element without a (second) additive is provided. The wrapping paper may be free of (second) additives around the circumference of the wrapping paper at both ends.

  The longitudinally extending core of the tobacco smoke filtration material may have one or more (eg, 2, 3, 4) separate masses of the first additive fully enclosed within. The first additive of a fully encapsulated (eg, embedded) mass may taper toward one or both ends and may have, for example, a generally ellipsoidal profile. If there is more than one mass of the first additive, the masses may be evenly spaced in the longitudinal direction. Arrangements of other lumps are possible, for example, the arrangement of other lumps is an arrangement in which, for example, larger intervals and relatively closely spaced longitudinal intervals are alternately arranged, and suitable for the manufacturing process. It is possible to achieve this arrangement by adjustment. The filter or filter element has a single embedded mass first additive proximate one end (eg, cigarette side end of a filtered cigarette) and a single embedding away from the other end (eg, mouth end). A first additive in a lump.

  The second (e.g. particulate) additive may spread only partially around the inner circumference of the wrapping paper, for example, the wrapping paper has overlapping vertical edges without the second additive, and the wrapping paper is wrapped around the core. Providing overlapping seams to hold. The second (eg, particulate) additive may cover a single region on the inner surface of the wrapping paper that extends partially from one end of the core toward the other end and is a single region spaced from both ends of the core. Or may be arranged in separate areas spaced apart in the longitudinal and / or circumferential direction.

  Applicants have discovered that tobacco smoke filters or filter elements can be manufactured in a single pass process with the benefit of the unexposed end of the additive (eg, the unexposed mouth end of the additive). Applicants have noted that the tobacco smoke filter or filter element may contain particulate additives at a loading that is greater than that possible with active patch filters and pod filters, and / or simply include one or more additives. I found it to get.

  The first additive may be a particulate additive. The first additive may be any particulate additive suitable for use in a tobacco smoke filter, such as activated carbon, zeolite, ion exchange resin (eg, weakly basic anion exchange resin), leptite, silica gel, alumina, molecular sieve. , Carbonaceous polymer resin, and diatomaceous earth. The first (particulate) additive may be a mixture of two or more materials. The first additive may include a flavourant, such as menthol, for example, the first additive may be a foam stone coated with menthol. The bulk particulate additive may be a bulk or group of particulate additive particles substantially separated from the filtration material, or a separate mass of bulk completely encapsulated (eg, mostly) within the filtration material. Alternatively, it may be encapsulated in the filtering material as a group of particulate additive particles. The term lump or group of particulate additives means that the individual particles of the particulate additive are dispersed (eg irregularly) within the matrix of the filtering material (eg fibrous matrix) or mutually dispersed. Does not mean a region in the filter. The first additive may be one or more fragile capsules or one or more fragile microcapsules. Capsules or microcapsules may contain various media, such as fragrance components and / or liquids, solids or other materials to assist in filtering smoke, for example. The use of capsules or microcapsules is well known in the prior art.

  Applicant has stated that when the first additive (completely encapsulated in the filter body) is a capsule or microcapsule or includes a capsule or microcapsule, and on the inner surface of the wrapper. When the two-particulate additive is activated carbon or other particulate additive, the second particle when the smoker pushes outside the filter to break fragile capsules or microcapsules (eg to release fragrance components) A further unexpected advantage has been found that the additive in the form further promotes the destruction of the microcapsules. This can be done, for example, until the actual smoking of cigarettes (to minimize the reduction of fragrance due to absorption by carbon, and the reduction of carbon work through the absorption of fragrance by carbon during storage). This is distinct from the known advantages of capsules and microcapsules that include filters that separate the absorbent and fragrance components within the filter.

  The second additive may be a particulate additive. The second additive may be any particulate additive suitable for use in a tobacco smoke filter, such as activated carbon, zeolite, ion exchange resin (eg, weakly basic anion exchange resin), leptite, silica gel, alumina, molecular sieve, It may be a carbonaceous polymer resin and diatomaceous earth. The second particulate additive may be a mixture of two or more materials. The second particulate additive may include an aroma component such as menthol, for example, the second additive may be a foam stone coated with menthol.

  The first and second additives may be the same, or the first and second additives may be different.

  The first additive and the second additive may be the same when it is desired to increase the total loading (eg, of activated carbon) to be applied, for example, during a single pass process.

  The first additive and the second additive may differ, for example, when it is desired for the additive to act on the smoke in different ways. Absorbent additives such as activated carbon that covers the inner surface (surface) of the paper roll in the radial direction are effective in reducing the gas phase mixture in the smoke, more than when the gas phase mixture is contained in the filter body. Also reduces the effect on flavor at this location. Thus, for example, in embodiments of the present invention, an absorbent material that has the desired small effect on flavor (but can provide a beneficial reduction in toxin components from smoke) can be applied on the wrapper (second addition An absorbent having a more advantageous effect on smoke while being used as the first additive (completely enclosed in the longitudinally extending core of the tobacco smoke filtering material) Good.

The weight of the first additive (eg, the first particulate additive having a density of about 0.5 g / cm ³ ) completely encapsulated in the longitudinally extending core of the tobacco smoke filtering material is 20 mm to 30 mm in length. For each filter chip, it may be, for example, 10 mg to 65 mg, such as 20 mg to 50 mg, such as 25 mg to 40 mg. The weight of the first additive may be, for example, 40 mg to 65 mg per chip for filter chips having a length of 20 mm to 30 mm (for example, if a large loading is required). The weight of the first additive may be, for example, 10 mg to 40 mg per chip for a filter chip with a length of 20 mm to 30 mm (for example, if a small loading is required).

The weight of the second additive applied to the wrapper (eg, a second particulate additive having a density of about 0.5 g / cm ³ ) is, for example, from 1 mg / linear mm to 3 (for a 15 mm wide patch, for example). It may be 5 mg / linear mm. It will be appreciated that the weight of the second additive can be varied, for example, by controlling the width of the patch, the weight of the additive applied per unit area, and / or the physical properties of the additive. Let's go.

  The tobacco smoke filter may be 15 mm to 40 mm long, for example 17 mm to 35 mm long, for example 20 mm to 30 mm long. The tobacco smoke filter element may be 10 mm to 20 mm long, for example 12 mm to 19 mm long, for example 14 mm to 18 mm long. The tobacco smoke filter or filter element may have a circumference of 16 mm to 28 mm, for example a circumference of 20 mm to 26 mm.

  Filter materials that form a longitudinally extending core with an additive mass embedded therein, for example, have been traditionally employed in the manufacture of cigarette smoke filters (usually filamentous, fibrous, woven, Or any material that has been extruded). The filtering material may be, for example, a filamentous tow of natural fibers such as cotton, or a filamentous tow of synthetic fibers such as plastics such as polyethylene or polypropylene, or a filamentous tow of cellulose acetate fibers. Filter materials include, for example, woven fabric materials such as natural or synthetic staple fibers, raw cotton, (usually creped) paper and synthetic non-woven fabrics, etc., and extruded materials (eg starch foam or Synthetic foam).

  According to the invention in a further aspect, a filter or filter element as described above and / or a plurality (e.g. 2, 4, 6, etc.) of filters or filter elements coupled end to end in a mirror image relationship. A composite rod is provided.

  According to the present invention in a further aspect, a method of manufacturing a tobacco smoke filter is provided, the method comprising a mass spaced longitudinally spaced completely enclosed within a continuous rod of tobacco smoke filtration material. Forming a continuous rod having a first additive, and a continuous rod and a continuous having a second (eg, particulate) additive affixed to the surface of the continuous strip in longitudinally spaced regions Continuously advancing the strip and continuously wrapping the continuous strip advanced around the advancing rod (optionally simultaneously forming the rod) such that the second additive contacts the rod. And, as a result, a step of cutting the rod wound with the continuously manufactured wrapping paper into a finite length. A continuous rod of tobacco smoke filtration material continuously advances the column of tobacco smoke filtration material in the longitudinal direction, bringing together the filtration material that advances so that the filtration material is shaped into a rod shape and consolidated, In order to form a mass of separated additives embedded in a continuously manufactured rod and spaced longitudinally along the rod, the advancing mass is filtered laterally (e.g. It may be formed by injecting the first additive discontinuously in the radial direction (eg, preferably through a fixed injection barrel or injection conduit). A continuous strip (eg, a wrapping roll) having a second (eg, particulate) additive affixed to its surface in longitudinally spaced areas is a limited area where a second additive is required. Apply the adhesive to the strip (eg, using a printing wheel) and then make the adhesive still reactive (eg, by removing the fluidized bed of additive or the circulating stream of additive from the container). It may be formed by applying additives while holding. A continuous strip (e.g., a stuffing roll) having a second (e.g., particulate) additive applied to its surface in longitudinally spaced regions may be formed as part of an in-line continuous process. In an alternative embodiment, the adhesive coated strip may be manufactured separately or obtained from an external supplier to activate the adhesive (eg heat softening) and the second additive Is applied in-line with the manufacture of the filter.

  The apparatus used for the manufacture of the filter, filter element, composite rod, etc. according to the present invention is the same as the apparatus described in EP 1827144, which is a combined tobacco smoke filtering material. Although the first (particulate) additive is injected into the transverse direction discontinuously by air pressure, the stuffing roll (member 52 in FIG. 1 of European Patent Application Publication No. 1827144) has a second additive added thereto. Apply the adhesive to the strip in the required limited area (for example using a printing wheel) and then apply the additive to the inner surface of the padding roll in longitudinally spaced areas A second (eg, particulate) additive that is affixed to the substrate. The positioning of the second additive on the outer wrapping paper may be synchronized with the positioning of the first additive in the inner mass so that the position of each of these two additive regions is mutually controlled. Is possible. In addition, the placement of the additive may be synchronized with the operation of the cutting machine such that cutting occurs in the additive-free zone (the cutting machine separates the continuously produced rows of filter material into separate filters. Cut into rods etc.).

  The filter according to the present invention may be used as it is, for example, as a single partial filter. Such filters are well known in the prior art. Although the advantages of single-pass filter manufacturing can be lost, the filter element according to the present invention can also be used as part of a multi-part filter, such as a double, triple, or other composite filter. Such filters are well known in the prior art.

  According to the invention in a further aspect, there is provided a tobacco smoke filter element comprising a longitudinally extending core of tobacco smoke filtration material, wherein the longitudinally extending core is at least a mass substantially completely encapsulated therein. With additives. The mass may be completely enclosed within the longitudinally extending core of the tobacco smoke filtration material. The tobacco smoke filter element may be 10 mm to 20 mm long, for example 12 mm to 19 mm long, for example 14 mm to 18 mm long. The filter element may further comprise a wrapper that engages around the core.

  In this aspect, the filter element does not include a second additive on the wrapper. However, some advantages of using various additives by using filter elements according to this aspect of the present invention as part of a multi-part filter such as double, triple, other composite filters, etc. Can be provided, in which case one of the other parts comprises the second additive. The filter element according to this aspect of the present invention may be used as part of the mouth end of such a filter, for example to provide the appearance of the unexposed end of the additive (in this case the lump is a cigarette smoke filter). Completely enclosed in the longitudinally extending core of the material). The filter element according to this aspect of the present invention may be used elsewhere in the filter (for example as part of the tobacco end), in which case the appearance of the unexposed end of the additive is much less. The mass may be substantially completely enclosed within the longitudinally extending core of the tobacco smoke filter material (eg, from a mass visible at one end (or both ends) of the longitudinally extending core of the tobacco smoke filter material). The additive can be very small).

  Here, the term filter element means a filter component or a filter part that constitutes a cigarette smoke filter together with other components or other parts, for example, the filter element forms part of a filter having a plurality of parts. Can do. This is different from a filter which in this respect means a complete filter (which may include filter elements).

  The additive can be a particulate additive. The additive may be any particulate additive suitable for use in a tobacco smoke filter, such as activated carbon, zeolite, ion exchange resin (eg, weakly basic anion exchange resin), lather, silica gel, alumina, molecular sieve, carbonaceous It may be a polymer resin and diatomaceous earth. The additive may be a mixture of two or more materials. The additive may include a fragrance component such as menthol, for example, the additive may be a foam stone coated with menthol. The additive may be one or more fragile capsules or one or more fragile microcapsules. Capsules or microcapsules may contain various media, such as fragrance components and / or liquids, solids or other materials to assist in filtering smoke, for example. The use of capsules or microcapsules is well known in the prior art. The apparatus used for the manufacture of filter elements, composite rods and the like according to this aspect of the invention is similar to the apparatus described in EP 1827144, which is a combined tobacco smoke filter. Adopted discontinuously pneumatically injecting additives laterally into the material and employed to cut the product rod to shorter lengths (eg, further spaced along the length of the product rod Adopted or set to insert a lump).

  According to a further aspect of the invention, there is provided a tobacco smoke filter comprising a longitudinally extending core of tobacco smoke filtration material, wherein the longitudinally extending core is at least a mass of substantially completely enclosed therein. It has an additive, which is one or more fragile capsules or one or more fragile microcapsules. The apparatus used in the manufacture of filters, composite rods and the like according to this aspect of the present invention is similar to the apparatus described in EP 1827144, which is a combined tobacco smoke filter material. The additive is injected pneumatically in a discontinuous manner.

  As another aspect of the present invention, a filtering material forming a longitudinally extending core with an additive mass embedded therein has been conventionally employed, for example, in the manufacture of tobacco smoke filters (usually in filamentous form). Any material (fibrous, woven or extruded). The filtering material may be, for example, a filamentous tow of natural fibers such as cotton, or a filamentous tow of synthetic fibers such as plastics such as polyethylene or polypropylene, or a filamentous tow of cellulose acetate fibers. Filter materials include, for example, woven fabric materials such as natural or synthetic staple fibers, raw cotton, (usually creped) paper and synthetic non-woven fabrics, etc., and extruded materials (eg starch foam or Synthetic foam).

  In the cigarette with filter according to the present invention, the filter of the present invention (or a filter including the filter element of the present invention) is coupled to a cigarette rod wound with a wrapping paper with one end of the filter facing the cigarette. The filter can be, for example, by ring tipping (wrapping just around the adjacent ends of the filter and the rod (wrapped with the paper) to leave most of the filter paper exposed) or completely It may be joined to a cigarette rod wrapped with wrapping paper by tipping overwrapping (wrapping around the entire length of the filter and around the adjacent end of the cigarette rod).

  Any filter or cigarette with filter according to the present invention may not be provided with vents, or may be prepared by methods well known in the prior art, for example pre-perforated or air permeable wrapping (stuffing). Vents may be provided by the use of the wrapping material and / or by laser drilling of the wrapping paper (stuffing wrapping material) and the tip-on top package. A vented full tip top package is likewise air permeable in nature, or may be provided with vents, and vents with both filter stuffing rolls and tip top packages. In the attached product, the vent hole penetrating the upper package usually coincides with the vent hole penetrating the stuffing roll. A vent through the filter stuffing roll, a vent through the tipping top package, or a vent through both simultaneously may be formed by laser drilling during the manufacture of the filter or cigarette with filter.

  The ventilation in the filter or cigarette according to the present invention is locally limited in the longitudinal direction of the product, and this local limitation depends on the required ventilation and filtration performance, depending on the mass of the first additive. It is preferably made in one or two regions selected from a position corresponding to the upstream side, the downstream side, or the mass of the first additive. Ventilation upstream of the mass of the first additive and / or venting at a location corresponding to the mass of the first additive is often preferred. The local restriction (of ventilation) may be suitably made in one or two regions selected from upstream, downstream or a position corresponding to the position of the second additive. When there are two or more vents, there may be vents between the positions of the second additive.

  The present invention will now be illustrated with reference to the following specific examples and the accompanying drawings.

1 is a schematic view of a four times longer cylindrical filter rod according to an embodiment of the present invention. FIG. It is the schematic of the cylindrical filter rod of 4 times length which concerns on 2nd Embodiment of this invention. FIG. 6 is a schematic view of a four times longer cylindrical filter rod according to a further embodiment of the present invention. FIG. 6 is a schematic view of a four times longer cylindrical filter rod according to still another embodiment of the present invention. It is the schematic of the cylindrical filter rod of 4 times length which concerns on 2nd Embodiment which differs further in this invention.

  FIG. 1 (not proportional to the original size) shows a four times longer cylindrical filter rod 1 fed to the manufacture of a cigarette with a filter, which is 108 mm long and 24.5 mm long. Is the circumference. During the manufacture of cigarettes, the illustrated four-length rod is usually cut at half positions to produce a double-length rod. Each double-length rod is then attached to each end (by well-known means of the prior art) with two wrapping cigarette rods and then two filter cigarettes. Each of the double length rods is cut in half. Accordingly, the illustrated rod includes four filter tips each having a length of 27 mm, with the ends joined together in a mirror image relationship.

  The rod 1 (and each filter tip) includes a longitudinally extending core 3 of tobacco smoke filtering material in the form of cellulose acetate tow and a wrapping paper wrapper 4 that engages around the core 3. The wick 3 has four lumps 5 (40 mg weight each) of the first additive in the form of activated carbon particles which are completely enclosed inside the wick 3 and arranged at equal intervals along the rod. Three patches 6, 6a, 6b of the second particulate additive in the form of activated carbon particles are affixed to the inner surface of the stuffing roll. The patches 6a and 6b are strips having a width of 15 mm (ie, the width in the circumferential direction) and a length of 22 mm (ie, the length along the rod), and the patch 6a is from one end of the rod 1 The patch 6 b extends from the other end of the rod 1. Therefore, each patch 6a, 6b extends over 22 mm from the end of the rod 1. The patch 6 is a strip having a width of 15 mm (that is, a width in a circumferential direction) and a length of 44 mm (that is, a length in a direction along the rod), and the center position of the strip is along the rod 1. Arranged in half position. Within the filter rod are two strips each 10 mm long with no carbon covering the wrapper at any position on the circumference, the first being the inner end of the patch 6a (ie at the end of the filter) The other end is disposed between the inner end of the patch 6 b and the other end of the patch 6. The carbon loading of each patch 6 is 3 mg / linear mm.

  The patches 6, 6 a, 6 b spread only partially around the inner circumference of the wrapping paper 4, and the wrapping paper 4 has a partially overlapping vertical edge without the second additive, The adhesive is applied to provide an overlying seam (not shown) that holds the wrapper around the core (as is well known in the prior art).

  Thus, when the rod 1 is cut into four filter tips, each tip of 27 mm has a 27 mm length of cellulose acetate tow core with a single mass and a padding that engages around the core. And 40 mg of activated carbon particles are enclosed in the core, and the wrapping paper is 22 mm long and 15 mm wide activated carbon attached to the inner surface in the radial direction of the wrapping paper. Each chip has a strip of 5 mm in length at one end of the wrapping paper, with no activated carbon attached (extending from one end). Therefore, the second additive (activated carbon) is not visible at this end of the filter. The (respective) filter chip has a carbon loading of 106 mg (40 mg in the embedded mass 5 and 66 mg in the patch 6 on the stuffing roll).

  The device used for the manufacture of the filter rod 1 is similar to the device described in EP 1827144, in which a lump of particulate additive is not present laterally in the combined tobacco smoke filtration material. Although continuously injected by pneumatic pressure, the wrapping paper 4 of the wrapping material (member 52 in FIG. 1 of European Patent Application No. 1827144) has a particulate additive, Techniques known in the art, for example by applying the additive after covering the restricted area where the second additive is required with a strip of adhesive (eg with a printing wheel) (UK patent) No. 2261152), and is adhered to the inner surface of the wrapping paper in a region spaced in the vertical direction. The positioning of the particulate additive on the wrapping paper 4 is synchronized with the positioning of the internal mass additive, so that the mutual position of each of these two additive regions is controlled. In addition, the positioning of these additives is synchronized with the operation of the cutting machine so that the final filtered cigarette cutting is only performed in the additive-free zone (the cutting machine is continuous The filter material rows produced in (1) are cut into separate filter rods 1). The embodiments of FIGS. 2-5 may be manufactured by similar techniques. It will be appreciated that alternative methods of manufacturing the product are possible without departing from the spirit of the invention. For example, the bulk particulate additive is positioned by means other than discontinuous injection or by using a stuffing roll pre-covered with a local patch of particulate additive.

  FIG. 2 shows a filter rod 1 ′ of the same type as that described in FIG. 1, which extends 3 mm from each end of the rod and is on the circumference of the web. There is a strip where the carbon does not cover the wrapper at any position and a further strip 7 which has a length of 6 mm in the center of the filter rod and does not cover the wrapper at any position on the circumference of the wrapper. The filter rod 1 'is cut into four individual filter tips with a length of 27mm without particulate additives at both ends. Each tip of 27 mm length is composed of a cellulose acetate tow core having a length of 27 mm in which 40 mg of activated carbon particles are enclosed, and a length of 19 mm and a width of 15 mm attached to the inner surface in the radial direction. A wrapping wrapping paper that engages around a core with a single patch (6 ') of activated carbon, each tip of 27 mm length at one end of the wrapping paper (extending from one end) The strip has a length of 5 mm and has no activated carbon attached thereto, and a strip having a length of 3 mm (extending from the other end) at the other end of the wrapping paper and has no activated carbon attached thereto. Each filter tip has a 97 mg carbon loading per tip (40 mg in the central mass and 57 mg on the stuffing roll).

FIG. 3 shows a filter rod of the same kind as that described in FIG. 2, there are only four additional 4 mm strips with no activated carbon applied to the web, and these strips are From 11 mm to 15 mm, 39 mm to 43 mm, 65 mm to 69 mm, and 93 mm to 97 mm. Each 27 mm long chip consists of a 27 mm long cellulose acetate tow core encapsulating 40 mg of lump activated carbon particles and two patches 6 ″, 6 ′ of activated carbon affixed to the radially inner surface. a wrapping web of wrapping material that engages around a core having a ^b (first patch 6 ″ 8 mm long, second patch 6 ″ ^b 7 mm long, both patches 15 mm wide); Each chip having a length of 27 mm has a length of 5 mm at one end of the wrapping paper and has no activated carbon attached thereto, and a length of 3 mm at the other end of the wrapping paper and has activated carbon attached thereto. And an unattached strip (and a third strip 4 mm wide between patches 6 ″, 6 ″ ^b without activated carbon). This results in having a carbon loading of 85 mg per chip (40 mg in the central mass and 45 mg on the stuffing roll). This construction allows each individual filter tip to be loaded with particulate additives directly under the ventilation zone (ie, corresponding to the gap between patches 6 ″, 6 ″ ^b ) when incorporating a ventilation filter into the cigarette. Allows you to have no area.

FIG. 4 shows a filter rod of the same kind as that described in FIG. 3, but in this embodiment the core 3 ′ ″ contains a fragourant completely enclosed therein. It has four lumps of first additives in the form of fragile microcapsules 10 (these microcapsules 10 are injected into the core instead of multiple carbon particles, for example by similar techniques). The presence of carbon particle patches 6 ''',6''' ^b in the stuffing roll advantageously allows for a more uniform destruction of the microcapsules 10 when the smoker pushes the outside of the filter. FIG. 5 shows a filter rod similar to that described in FIG. 4, but in a further embodiment, the wick 3 ″ ″ contains a single fragrance component completely enclosed therein. It has four masses of the first additive in the form of one capsule 11. The presence of carbon particle patches 6 ″ ″, 6 ′ ′ ″ ^b in the stuffing roll also advantageously allows for a more uniform breakage of the capsule when the smoker pushes the outside of the filter.

  In another embodiment of the invention (not shown), a 14 mm length and 24 including a 12 mm long cellulose acetate tow core and a wrapping wrapping paper engaging around the core. A filter element with a circumference of .5 mm is provided, the core completely enclosing 25 mg of lump of activated carbon in its interior. The apparatus used for the manufacture of this filter element (and its composite rods etc.) is similar to the apparatus described in EP 1 827 144, which is contained within the combined tobacco smoke filtering material. The additive is injected pneumatically in a discontinuous manner.

Claims (9)

A longitudinally extending core of tobacco smoke filtering material; and a wrapping paper engaging around the core, wherein the longitudinally extending core is at least a first addition completely enclosed therein The wrapping paper has a particulate second additive affixed to one or more portions of the radially inner side surface, and the wrapping paper is arranged at one end around the circumference thereof. Tobacco smoke filters or filter elements without additives.   The first additive is a particulate additive, and / or activated carbon, zeolite, ion exchange resin (for example, weakly basic anion exchange resin), gypsum, silica gel, alumina, molecular sieve, carbonaceous polymer resin, Or the tobacco smoke filter or filter element of Claim 1 which is diatomaceous earth.   The tobacco smoke filter or filter element of claim 1, wherein the first additive is one or more fragile capsules or one or more fragile microcapsules.   The second additive is a particulate additive, and / or activated carbon, zeolite, ion exchange resin (eg, weakly basic anion exchange resin), gypsum, silica gel, alumina, molecular sieve, carbonaceous polymer resin, Or it is diatomaceous earth, The tobacco smoke filter or filter element of any one of Claims 1-3. The weight of the first additive completely enclosed in the longitudinally extending core of the tobacco smoke filtering material is 10 mg to 65 mg for a filter chip having a length of 20 mm to 30 mm, and / or the second The tobacco smoke filter or filter element according to any one of claims 1 to 4, wherein the weight of the additive is 1 mg / linear mm to 3.5 mg / linear mm. The said 1st additive and the said 2nd additive are the same, and / or at least any one of the said 1st additive and the said 2nd additive contains an aromatic component (flavourant). The tobacco smoke filter or filter element of any one of Claims. A cigarette with a filter including the filter according to any one of claims 1 to 6 , or a cigarette rod including the filter element according to any one of claims 1 to 6 and wound with a wrapping paper Filter. A composite rod comprising a plurality of filter elements according to any one of claims 1 to 6 or a plurality of filters according to any one of claims 1 to 6 , wherein ends thereof are integrally coupled in a mirror image relationship. . Forming a continuous rod having a plurality of chunks of a first additive fully enclosed within a continuous rod of tobacco smoke filtration material and spaced longitudinally;
Continuously advancing the continuous strip with the continuous rod and the particulate second additive affixed to the surface of the continuous strip in longitudinally spaced regions;
Continuously wrapping the advancing strip around the advancing rod such that the second additive contacts the rod;
Cutting a rod continuously produced and wound with paper wrapper into a finite length, and a method for producing a tobacco smoke filter comprising:
The continuous rod of tobacco smoke filtration material continuously advances the row of tobacco smoke filtration material in the longitudinal direction and gathers the filtration material advanced in a lateral direction so that the filtration material is shaped into a rod shape and consolidated. The filter material that has been advanced forward to form a separate mass of additive that is embedded in a continuously manufactured rod and spaced longitudinally along the rod. A second additive in the form of particles that are formed by injecting the first additive discontinuously in the direction of air pressure or the continuous strip is applied to the surface of the continuous strip in longitudinally spaced areas And the continuous strip is formed by applying an adhesive to the strip in a limited area where the second additive is required and then applying the additive. A method of manufacturing a filter.

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