KR101987886B1 - Tobacco smoke filter - Google Patents

Abstract

A longitudinally extending core of tobacco smoke filtering material comprising an additive spaced longitudinally from a first end of the core; A first wrapper around the core; And a second wrapper around the first wrapper; The first wrapper, along with at least a second wrapper (e.g. between itself and itself), comprises at least one channel (e.g., 5 to 23 channels) extending in the longitudinal direction of the filter from at least one end of the filter Tobacco smoke filter or filter element.

Description

Tobacco smoke filter {TOBACCO SMOKE FILTER}

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

Particulate additives, particularly cigarette filters containing activated carbon, are well known in the tobacco industry. The absolute majority of such filters comprise a plurality of longitudinally adjacent segments wherein the mouth end segment does not contain any particulate additives and thus provides an acceptable end appearance while one or more upstream ) Segments contain or contain particulate additives. This multi-segment filter is referred to as a " single section " filter, which is a " single section "filter (Formed of filtration material in one (separate) section rather than in filtration material), and a single section filter is known to be one-pass by, for example, a single machine process.

Previously, the present applicants have developed a "single carbon filter", ie a single section filter with carbon incorporated therein which has at least one end free of particulate additives and which can be produced during a one-pass process. These are 'Active Patch' (British Patent No. 2261152) and 'Smooth Core' (International Patent Publication No. 2006/059134) filters. Each of which is characterized by a particulate additive in a pod located on, or in the middle of, the inner surface of the wrapper.

Applicants have also developed a 'CPF' filter (see, for example, British Patent No. 2133269). They feature an inner wrap which has an embossed groove on a portion of the length of the inner wrap and which has the advantage of providing improved filtration efficiency and / or lower pressure drop compared to a standard cellulose acetate filter. Additionally, they can provide a unique end appearance. Such a filter can be used as a single section filter, or as a segment in a multi-segment filter. British Patent No. 2261152 suggests that the features of the CPF filter can be combined with the features of the active patch filter to create a single section CPF filter containing, for example, carbon. Such a filter may be referred to as the term 'APF / CPF'. A disadvantage of these filters, however, is their tendency to have higher levels of carbon carryover (CCO), i.e., the release of carbon grains during production can be accidentally delivered to the groove area of the inner wrap, Which can contaminate the appearance of the filter. During the preparation of the filter, the removed granules are difficult to remove.

According to the present invention, a longitudinally extending (e.g., single-walled) extrusion of a cigarette smoke filtering material comprising an additive spaced longitudinally from the first (downstream) end of the core (e.g., particulate additive) Section) core; A first wrapper (e.g., of a breathable material) around the core; And a second wrapper around the first wrapper; The first wrapper defines at least one channel (e.g., a single section) extending in the longitudinal direction of the filter from at least one end of the filter, along with at least a second wrapper (e.g., between itself) Tobacco smoke filter or filter element. Preferably, the first wrapper defines at least one channel extending longitudinally from the first (downstream) end of the filter (with at least a second wrapper). Preferably, the first wrapper includes at least five channels extending from the at least one end of the filter in the longitudinal direction of the filter (for example, between 5 and 23 Channel, for example, 9 to 20 channels). A filter or filter element of about 24-25 mm circumference may, for example, comprise 14-20 channels. A filter or filter element of about 16-17 mm circumference may, for example, comprise 9 to 14 channels.

The particulate additive is spaced longitudinally from the first (downstream) end of the core, so that it is not visible from the first (downstream or slit) end of the core. In one embodiment, the longitudinally extending core of the cigarette smoke filtering material comprises one (or at least one) pocket of a fully encapsulated (e.g., embedded) additive (e.g., a particulate additive) (For example, a single section) of a tobacco smoke filtering material. The bar-shaped core of the cigarette smoke filtering material may optionally have an additional wrapper (e.g., porous or non-porous) engaged around the bar-shaped core. Providing the additive pockets completely encapsulated within the core of the cigarette smoke filtering material has the effect that the additive is spaced from the first (downstream) end of the core in the longitudinal direction (distance between the additive pocket and the first end of the core Since there is a cigarette smoke filtering material in between).

In one aspect according to the present invention there is provided a cigarette smoke filter material comprising a longitudinally extending (e.g., substantially spherical) cigarette smoke filtering material comprising an additive (e.g., particulate additive) spaced longitudinally from a first (downstream) For a single section) core; A first wrapper (e.g., of a breathable material) around the core; And a second wrapper around the first wrapper; The first wrapper defines at least one channel extending in the longitudinal direction of the filter from at least one end of the filter, along with at least a second wrapper (e.g., between itself and itself); Wherein the longitudinally extending core of the cigarette smoke filtering material comprises a cigarette smoke filter having one (or at least one) pocket of an additive (e.g., a particulate additive) that is completely encapsulated (e.g., (E. G., A single section) containing a bar-shaped core of material to provide a cigarette smoke filter or filter element. Preferably, the first wrapper includes at least five channels extending from the at least one end of the filter in the longitudinal direction of the filter (for example, between 5 and 23 Channel, for example, 9 to 20 channels). A filter or filter element of about 24-25 mm circumference may, for example, comprise 14-20 channels. A filter or filter element of about 16-17 mm circumference may, for example, comprise 9 to 14 channels.

Preferably, the first wrapper is a breathable material. In other words, preferably, the first wrapper is a breathable wrapper. The first wrapper may be, for example, a breathable filter paper (e.g., a corrugated breathable filter paper) or a wrapper of cellulose acetate (e.g., wavy breathable cellulose acetate).

Preferably, the first wrapper is a waveform, thereby providing (defining) a longitudinally extending channel of the filter from at least one end of the filter with at least a second wrapper (e.g., between itself). The first wrapper may be a waveform and the waveform may include five or more channels extending from the at least one end of the filter (e.g., with the second wrapper) in the longitudinal direction of the filter, for example, 5 to 23 channels, For example, 9 to 20 channels are provided (defined). A filter or filter element of about 24-25 mm circumference may include, for example, 14-20 channels (provided by the waveform). A filter or filter element of about 16-17 mm circumference may, for example, comprise 9 to 14 channels (provided by the waveform). As used herein, the term " corrugated "or" corrugated "includes folded shapes including parallel and alternating floors and grooves.

Preferably, the corrugations in the first wrapper are embossed grooves (e.g., formed by embossing the material of the first wrapper). For example, the first wrapper may be a sheet having a profiled (e.g., embossed, wavy) surface and a profile facing the second wrapper (i.e., facing outwardly radially) The sheet is wrapped around the core so that the ringed surface forms a channel with the second wrapper. It will be appreciated that a first wrapper, which is a corrugation, is wrapped around the core such that the corrugations (and channels) are oriented longitudinally (e.g., substantially longitudinally) along the axial direction of the core. Each channel can be provided by the waveform of the first wrapper and is preferably closed or blocked at the end remote from the end of the filter from which the channel extends. Generally, the core surface conforms to a radially facing (profiled) surface of the first wrapper (i.e., the surface of the first wrapper facing the core). In another embodiment, the core surface does not conform to the radially facing (profiled) surface of the first wrapper, and in this embodiment the first wrapper, along with the second wrapper, Can be defined. In another embodiment, the first wrapper is profiled only on one surface, and the profiled surface faces the second wrapper (i.e., facing outwardly radially) to form a channel with the second wrapper around the core And the wrapped core surface conforms to a non-profiled corrugated inner surface of the first wrapper and the channel remains only between the first wrapper and the second wrapper.

Accordingly, the present invention is directed to a "pod", or a fully encapsulated particulate additive pocket (eg, as described in International Patent Publication No. 2006/059134) located axially centered, and To provide a single section filter with a wavy inner wrap embossed into a groove on a portion of its length, which together form a channel. In this manner, manufacturing costs and complexity associated with particle-bearing multi-segment filters, and CCO disadvantages of APF / CPF single section filters can be avoided. In addition, this allows for excellent flexibility in filter design. By controlling parameters such as the size and location of the central pod (pocket) and the length and location of the grooved portion of the first (inner) wrapper, the filter performance, taste experience, It is possible to pass the smoke through the filter. For example, when using the central pod of activated carbon granules, if the channel (the "corrugated zone") occupies a longitudinal region of the filter similar to the pod, the smoke can be directed away from the pod, Less. Conversely, if the channel (corrugated area) occupies the longitudinal region of the different filter from the pod, the smoke can be preferentially directed through the pod, allowing the smoker to have a 'carbon taste' (if the pod contains carbon) (Where the pod comprises a different flavoring agent). Additionally, the filter allows for higher tar retention (at the same pressure drop) or lower pressure drop (at the same tar nature) than a conventional 'smooth core' filter.

A longitudinally extending core (e.g., a longitudinally extending single section core) of the cigarette smoke filtering material is located proximate the second end (e.g., the upstream cigarette end in the filter cigarette) and the first end (E. G., Embedded) into the interior of the container, either far away from the first end (e.g., downstream, or oral or calcified end), or away from the second end (but spaced longitudinally therefrom) (E. G., A particulate additive). ≪ / RTI > The longitudinally extending core of the cigarette smoke filtering material may be completely and internally disposed between the second end of the core (e.g., the tobacco end) and the first end of the core (e.g., the cleft end) And may have a single pocket of an encapsulated (e.g., embedded) additive (e.g., a particulate additive). The single longitudinally extending core of the cigarette smoke filtering material may comprise one or more (e.g., two, three, four) separate pockets of fully encapsulated additive (e.g. particulate additive) Lt; / RTI > The fully enclosed (e.g., embedded) additive pocket (s) may be angled towards one or both ends (e.g., generally in an oval configuration). If more than one additive pocket is present, they may have a constant longitudinal spacing. It is possible to achieve this by proper adjustment of the manufacturing process, other pockets are possible (e.g., longer intervals and relatively close vertical spacing). (Or at least one) pocket of an additive (e.g., particulate additive) that is completely encapsulated (e.g., embedded) inside a tobacco smoke filtering material A longitudinally extending core may be produced by, for example, the method and apparatus disclosed in WO 2006/059134.

The filtration material may be any of the materials (typically filamentary, fibrous, web or extruded) that are customarily employed, for example, in the manufacture of cigarette smoke filters. The filtration material may be, for example, plastic such as polyethylene or polypropylene or a synthetic or natural filamentary tow of cotton, or a cellulose acetate filamentous tow. This may be, for example, a web material and synthetic nonwoven such as natural or synthetic short fibers, cotton wool, paper (typically crepe paper), and extruded material (e.g. starch, synthetic foam).

The additive may be a particulate additive. The particulate additive may be any particulate additive suitable for use in a cigarette smoke filter, such as activated carbon, zeolite, ion exchange resins (e.g., weakly basic anion exchange resins), sepiolite, silica gel, alumina, Self-polymer, carbonaceous polymer resin, and diatomaceous earth). The particulate additive may be a mixture of two or more materials. The additive may include a smoke modifier (e.g., a flavorant). It can be any flavoring agent such as menthol, spearmint, clove oil, etc., suitable for use for smoking articles such as cigarettes, or any of the smoke modifiers known in the art (e.g., flavoring agents). The flavoring agent can be any flavoring agent known for use in a cigarette smoke filter or filter element. For example, the flavoring agent may be menthol, spearmint, peppermint, nutmeg, cinnamon, clove, lemon, chocolate, peach, strawberry, vanilla and the like. A preferred smoke modifier (flavoring agent) is menthol. For example, the additive may be a sepiolite granule to which a menthol flavoring agent is applied. When the longitudinally extending core of the cigarette smoke filtration comprises fully enclosed (e.g. embedded) additive pocket (s) embedded therein, the additive can be a particulate additive such as activated carbon (see above) , Which is enclosed in the filtration material, for example, as a separate pocket or pod of particulate additive particles substantially separated from the filtration material and completely encapsulated therein. In other embodiments, the fully encapsulated (e.g., embedded) additive pocket (s) can be a friable capsule or capsules, or one or more friable microcapsules. The capsule (s) or microcapsule (s) may contain a variety of media (e.g., smoke modifiers such as flavoring agents (such as those disclosed above) and / or liquids, solids, or other materials ). ≪ / RTI > The use of capsules or microcapsules is well known in the art.

The weight of the additive completely enclosed in the longitudinally extending core of the cigarette smoke filtering material (e.g., particulate additive of about 0.5 g / cm ³ density) is, for example, 20 to 30 mm long, For example from 10 to 65 mg, for example from 20 to 50 mg, for example from 25 to 40 mg, per filter. In the case of a 20 to 30 mm long filter, the weight of the first additive can be, for example, from 40 to 65 mg per filter (for example, when high loading is required). For a 20 to 30 mm long filter, the weight of the first additive can be, for example, 10 to 40 mg per filter (for example, if lower loading is required).

The filter or filter element may comprise at least one channel extending in the longitudinal direction of the filter from the first (downstream) end of the filter and at least one channel extending in the longitudinal direction of the filter from the second (upstream) , Each channel extending only to a portion of the core length.

The channel (or one or more channels) may extend longitudinally from a first (downstream) end of the filter to a second (upstream) end of the filter. However, it is contemplated that at least one portion of the filter or filter element does not include a longitudinally extending channel along its length (i.e., the channel (s) may extend from the first (downstream) end of the filter to the second Upstream) ends of the first and second plates.

The filter or filter element may comprise up to 23 channels, preferably 14 to 20 channels, extending longitudinally from one (or both) ends of the filter or filter element (about 25 mm circumferential filter / Element). The filter or filter element may comprise at least five channels extending longitudinally from one (or both) ends of the filter or filter element, for example from 5 to 23 channels, preferably from 14 to 20 channels (e.g., 9 to 14 channels or 14 to 20 channels). The total cross-sectional area of these channels may reach 2 to 12%, preferably at least 4%, more preferably 4 to 8% of the total cross-sectional area of the filter or filter element. Thus, careful control over the number and / or depth of channels (e.g., by controlled embossing of the first wrapper) can provide improved filtering performance. By increasing the depth of the waveform in the first wrapper, preferably by increasing the surface area of the waveform available to the smoke, and optionally with an increase in the waveform pitch (i. E., Expansion of the waveform accompanied by a decrease in the number of waveforms) , This can be achieved. For example, the filter according to the present invention may have 15 channels at a pitch of about 1.5 mm at one or both ends of the filter, about 0.45 mm in depth; The other filter can have 0.32 mm deep channels at a pitch of 1.05 mm and the number of channels is 23 (at each end or at either end). In these embodiments, the area of the wavy lap that can be used for smoke filtration is generally slightly less than the total wavy surface area, since the ridgeline of the waveform generally abuts the outer wrapper and is therefore not effective for the filter. A filter or filter element of about 24-25 mm circumference may, for example, comprise 14-20 channels. A filter or filter element of about 16-17 mm circumference may, for example, comprise 9 to 14 channels.

The length of the cigarette smoke filter may be from 15 to 40 mm, for example from 17 to 35 mm, for example from 20 to 30 mm. The circumference of the tobacco smoke filter may be from 14 to 28 mm, for example from 16 to 26 mm, for example from 16 to 17 mm, or from 24 to 25 mm.

Preferably, the length of each channel is at least 2 mm, preferably from 2.5 mm to 23 mm, more preferably from 3 mm to 15 mm, and still more preferably from 3.5 mm to 9 mm. Channels or channels extending from one end (upstream or downstream) may be of a different length or the same length as those extending from the other end (if present). The length of the channel may be 7 to 8 mm. The length of the channel may be 3 to 4 mm, for example 3.75 mm. In one embodiment, the channel extends only from one end (upstream or downstream) and is 7 to 8 mm in length. In another embodiment, the channel extends from both the upstream and downstream ends and is 3 to 4 mm in length (at each end).

Preferably, the depth of the channel will be substantially uniform across their longitudinal magnitudes, although there may be variations, for example when the channel approaches the closed end.

The finished filter of the present invention may have a second wrapper (which is essentially permeable material and / or can be perforated) that is breathable around a first (e.g., wavy) wrapper. This permeable outer wrapper can be a tipping overwrap for incorporating the filter into the filter cigarette, which is applied only in the cigarette manufacturing stage. In this case, the filter rod is initially fabricated with the first wrapper exposed, and the present invention includes such a rod (see below) in addition to the finished filter with the outer wrapper attached. Thus, in a further aspect according to the present invention there is provided a tobacco smoke filtering material comprising a longitudinally extending portion of a tobacco smoke filtering material comprising an additive (e.g. particulate additive) spaced longitudinally from a first (downstream) core; And a first wrapper (e.g., of a breathable material) around the core; The first wrapper is wavy and the waveform defines at least one channel extending from one end of the filter (on its radially outer surface) in the longitudinal direction of the filter; Wherein the longitudinally extending core of the cigarette smoke filtering material comprises a cigarette smoke filter having one (or at least one) pocket of an additive (e.g., a particulate additive) that is completely encapsulated (e.g., A cigarette smoke filter or filter element is provided (e.g., a single section) that includes a bar-shaped core of material.

A filter may also be used with a non-breathable second wrapper, for example a paste topsheet.

A portion of the filter (or each portion) (e.g., a portion of the first wrapper that is corrugated, e.g., embossed with a corrugation, or each portion thereof) that includes the longitudinal channels is referred to herein as a corrugated or corrugated portion . (Or portions or portions of each) of the filter that does not include longitudinal channels (on the filter cross-section) (e.g., the first wrapper is flat (e.g., not embossed / Or portions thereof) are referred to herein as rod or rod portions. In one embodiment, the filter according to the present invention comprises a 3-mm wrinkle portion at each end and a single central rod portion as the remaining total length of the filter. This configuration has the additional advantage that the amount of filter material (e.g., cellulose acetate tow) in the core can be reduced because the pressure drop of the bar (PD / mm) is higher than the pressure drop of the wrinkles. This configuration can also provide a more favorable end appearance.

In a further embodiment of the invention, the cigarette smoke filter comprises at least one channel extending in the longitudinal direction of the filter and extending only at a portion of the core length and not extending from the upstream or downstream end of the filter (e.g., A wrapper and a second wrapper). In this embodiment of the invention, the cigarette smoke includes one or more longitudinal channels (corrugated portions) on one or both of the upstream and downstream ends of the filter, and additional longitudinal channels or channels Of corrugated portion). In this embodiment, there is one or more sections or sections (one or more rod sections) of the filter without longitudinal channels. The filter may have additional corrugated areas and / or bar areas.

In the filter cigarette according to the present invention, the filter of the present invention (or the filter including the filter element of the present invention) is connected so that one (second, upstream) end of the filter is directed toward the cigarette in the wrapped tobacco rod. For example, a ring paste (which is wrapped so that much of the filter wrap remains exposed) and by engagement only about the proximal end of the rod, or, more preferably, the entire paste topsheet By engaging adjacent ends of the rod and around the entire filter length), the filter can be connected to the wrapped tobacco rod.

(S) (plugwrap), and / or wrapper (s) (plug wrap) and paste tops, for example, by pre-punched or breathable wrapper May be used to ventilate or ventilate any filter or filter cigarette according to the present invention. Likewise, the vented overall paste topsheet may be essentially breathable or provided with vents, and in vented products in which both the filter plug wrap and the paste topsheet are both present, ventilation through the topsheet is typically vented through the plug wrap Lt; / RTI > Vents through the filter plug wrap, through the paste topsheet, or both at the same time can be produced by laser drilling during filter or filter cigarette manufacture.

If the ventilation in the filter or filter cigarette according to the present invention is localized in the longitudinal direction of the product, preferably, depending on the required ventilation and filtration performance, this localization may be achieved by upstream, downstream, Or one or two regions selected from additive pockets. Upstream of the first additive pocket and / or venting to match it is often desirable. If more than one is present, there may be ventilation between the second additive portion (or pocket or patch).

Additional aspects in accordance with the present invention include a plurality (e.g., two, four, six, etc.) filters (e.g., two, four, six, etc.) connected end to end in an enantiomeric relationship as described above and / Or filter elements) are provided.

Hereinafter, the present invention will be described with reference to the following embodiments and the accompanying drawings.

Degree 1 schematically illustrates a filter according to an embodiment of the present invention.
Degree 2 schematically illustrates a filter according to a second embodiment of the present invention.
Figure 3 schematically illustrates a filter according to a further embodiment of the present invention.

Figures 1, 2 and 3 show an embodiment of a 'smooth core' CPF filter.

Fig. 1 shows an embodiment of the invention in which the core and the barrel core of a cellulose acetate filtration material with a "pod" or pocket (3) fully enclosed (embedded) inside the additive in the form of activated carbon particles (4) Of a single section tobacco smoke filter 1 of 27 mm length and 24.5 mm circumference comprising a longitudinally extending core (2) of tobacco smoke filtering material in the form of a tobacco smoke filtering material. The core (pod filter element) 2 may be formed, for example, by the method disclosed in International Patent Publication No. 2006/059134. The first wrapper 5 of the breathable filter paper (or corrugated cellulose acetate) surrounds the core 2, which forms the corrugated portion 6 (Fig. (That is, a section of the wrapper surrounding a portion of the core 2, including a molded pocket or pod), that is to say that the corrugations or grooves extend in the axial direction of the filter ). The core surface conforms to the waveform in the first wrapper (5). The non-corrugated second wrapper 10 of the breathable paper surrounds the first wrapper 5 and forms (defines) the channels 9a and 9b with the corrugation in the first wrapper 5. [ The core and wrappers 5 and 10 extend over the entire length of the filter 1. Including the undeformed circumferential portion 6 of the wrapper 5 in the central portion of the filter means that there is no channel in this portion and that the channels 9a and 9b do not extend to the full length of the filter. The filter 1 thus comprises a set of 15 channels 9a with a length of 7.5 mm formed in the first or downstream end 11 of the filter (the waved portion of the first wrapper 5 and the wave- And a second set of fifteen channels 9b of length 7.5 mm at a second end or upstream end 13 of the filter at a second end (formed by a first wrapper 5) and the non-corrugated second wrapper 10, which form corrugated portions or corrugations at the respective ends 11, 13 of the filter 1. At the center of the filter, the undamped area of the wrapper 5 in the circumferential portion 6 forms a wavy or unfilled rod portion (rod) 12 mm long at the center of the filter. This bar portion blocks the end of each channel opposite the end of the filter from which each channel begins to extend. The rod portion of the filter does not include a longitudinally extending channel on the cross section of the filter 1 along the entire length of the rod portion. The step of applying a first wrapper, which is corrugated around the core, and the step of applying a second wrapper, may be performed by a known method (e.g., Those described in Japanese Patent No. 2133269). It will be appreciated that the process of applying the first wrapper proceeds and coincides with the process of forming and positioning the pod in the central section of the filter core.

For example, the filter (1) can be attached to a cigarette by ring-pasting or a full paste topsheet, and such methods are well known in the art. It will be appreciated that the core 2, and the wrappers 5, 10 may be formed using other materials known in the art.

Thus, the filter comprises a channel 9a, 9b embossed (wavy) at both ends to provide a unique appearance to both ends of the filter, and a non-embossed central portion 6, (Ie, a 'bar'). The pockets of the activated carbon granules are located within the body of the filter and are located within an area defined by approximately the bar. During use, with the filter attached to the cigarette (not shown) at the end 13, a portion of the smoke enters the core 2 directly and passes to the end 11 of the filter 1, And the activated carbon in the pocket. With dilution air aspirated through the permeable wrapper 10, the smoke also enters the non-corrugated portion (rod) 6 through the channel 9b, and then the diluted smoke flows into the waved wrapper 5 And enters the core 2 and passes out of the filter at the end 11 so that the smoke is filtered by both the wrapper 5 and the core 2. The filter according to the present invention may also be used with a non-ventilated wrapper, in which case there will be no dilution air being drawn into the filter through the wrapper.

Thus, the embodiment of FIG. 1 includes a "pod" or fully encapsulated pocket of particulate additive located axially centered (as described, for example, in International Patent Publication No. 2006/059134) Lt; / RTI > is a single section filter with an inner wrap embossed in a groove (channel) on a portion. This filter avoids both the complexity and manufacturing cost associated with particle-bearing multi-segment filters (because it is a single section filter) and avoids the CCO disadvantage of APF / CPF single section filters Pods or pockets). The Figure 1 embodiment may also be used to control parameters such as the size and location of the central pod (pocket) and the length and location of the grooved portion of the inner wrap, thereby reducing the filtration performance, taste experience, It is possible to pass the smoke through the filter in the manner described above. As discussed above, as the corrugated area occupies a longitudinal region of the filter different from the pod, it passes preferentially through the carbon pod, creating a more 'carbon taste' for the smoker. Additionally, the filter allows for higher tar stiffness (at the same pressure drop) or lower pressure drop (at the same tar stance) than a conventional 'smooth core' filter. It will be appreciated that the corrugated area may provide a different arrangement occupying the longitudinal region of the filter similar to the pod, thereby creating a smoker with less 'carbon taste' by passing the smoke away from the pod (see, for example, FIG. 3 Reference).

Figure 2 shows a further embodiment of providing a unique lip end profile by having a single pleated region facing the lip end 31 (right side of the diagram) of the filter. Figure 2 shows a cross-sectional view of a cellulosic article having a " pod "or pocket 23 that is completely encapsulated (e.g. embedded) inside the additive in the form of activated carbon particles 24 positioned towards the second end or upstream end 33 of the filter. Section of a 27 mm long and 24.5 mm circumference single section tobacco smoke filter 21 comprising a longitudinally extending core 22 of a cigarette smoke filtering material in the form of a bar in the form of an acetate filtration material. The first wrapper 25 of the breathable filter paper surrounds the core 22 immediately and is surrounded by a circumferential portion 26 that is not corrugated towards the second end or upstream end 33 of the filter The section of the wrapper surrounding a portion of the core 2 including the pod). As in the FIG. 1 embodiment, in the embodiment of FIG. 2, the core surface conforms to the waveform in the first wrapper 25. The non-corrugated second wrapper 30 of the breathable paper surrounds the first wrapper 25 and forms (defines) the channel 29a with the corrugation in the first wrapper 25. The core and wrappers 25 and 30 extend over the entire length of the filter 1. Including the undeformed circumferential portion 26 of the wrapper 25 in the upstream portion of the filter means that there is no channel in this portion and that the channel 29a does not extend to the full length of the filter. The filter 21 is thus formed at the first or downstream end 31 of the filter formed between the corrugated portion of the first wrapper 25 and the second corrugated wrapper 30 of the breathable paper. (For example, 15 channels 29a) of a channel 29a having a length of 15 mm. These channels (corrugations) form a corrugated portion or corrugation at the downstream or crushing end 31 of the filter 1, thereby providing a unique end appearance to this end and a rod region at the other end. The pockets of activated carbon granules are located approximately below the bar area, towards the tobacco end of the filter.

FIG. 3 shows a further embodiment of providing a tolerable end-to-end appearance by having a single pleated region facing the tobacco end 53 (left side of the diagram) of the filter. The carbon pod is also located approximately coincident with the corrugated area, towards the tobacco end of the filter. 3 is a cross-sectional view of a cell with a "pod" or pocket 43 fully encapsulated (e.g. embedded) inside the additive in the form of activated carbon particles 44 positioned towards the second end or upstream end 53 of the filter Length and 24.5 mm circumference cigarette smoke filter 41 comprising a longitudinally extending core 42 of cigarette smoke filtering material in the form of a bar-shaped core of acetate filtration material. The first wrapper 45 of the breathable filter paper surrounds the core 42 at a distance from the first end or the downstream end of the filter to the circumferential portion 46 (i.e., Except for the section of the wrapper that does not enclose a portion of the core 42 that contains the core 42). The core surface conforms to the waveform in the first wrapper 45. The non-corrugated second wrapper 50 of the breathable paper surrounds the first wrapper 45 and forms (defines) the channel 49b with the corrugations in the first wrapper 45. The core and wrappers 45 and 50 extend over the entire length of the filter 41. Including the undamped circumferential portion 46 of the wrapper 45 in the downstream portion of the filter means that there is no channel in this portion and that the channel 49b does not extend to the full length of the filter. The filter 21 thus has a length formed in the second end or upstream end 51 of the filter formed between the corrugated portion of the first wrapper 45 and the second corrugated wrapper 50 of the breathable paper, (E. G., 15 channels 49b) of 10 mm channels 49b. These channels (corrugations) form a corrugated portion or corrugation at the upstream end 51 of the filter 41 and a bar region at the other (corrugated) end.

Claims (16)

As a single-section tobacco smoke filter,
A core of longitudinally extending cigarette smoke filtering material, said core comprising at least one pocket in which the additive is fully encapsulated therein, said pocket being longitudinally spaced from said first end of said core ;
A first wrapper around the core; And
The second wrapper around the first wrapper
;
Wherein the first wrapper forms at least one channel extending in the longitudinal direction of the filter from at least one end of the single section tobacco smoke filter with at least the second wrapper,
Single section cigarette smoke filter. The method according to claim 1,
Wherein the first wrapper is a breathable material. The method according to claim 1,
Wherein the first wrapper is corrugated such that the waveform forms at least five channels extending in the longitudinal direction of the filter from at least one end of the filter. The method according to claim 1,
Wherein the filtration material is selected from the group consisting of one or more natural or synthetic filament tows, cotton or plastic, polyethylene, polypropylene, cellulose acetate filament tow, natural or synthetic staple fibers, cotton wool, , Crepe paper, synthetic nonwoven material, extruded material, starch, or synthetic foam. The method according to claim 1,
Wherein the additive is a particulate additive. 6. The method of claim 5,
Wherein the particulate additive is a single section that is a mixture of two or more of activated carbon, zeolite, ion exchange resin, weakly basic anion exchange resin, sepiolite, silica gel, alumina, molecular sieve, carbonaceous polymer resin, diatomaceous earth, Tobacco smoke filter. The method according to claim 1,
Wherein the at least one pocket additive in which the additive is fully encapsulated therein is frangible capsules or capsules, or one or more disruptive microcapsules. The method according to claim 1,
A single section tobacco smoke filter, comprising an aroma agent. As a single-section tobacco smoke filter,
A longitudinally extending core of tobacco smoke filtering material comprising an additive spaced longitudinally from a first end of the core; And
The first wrapper around the core
/ RTI >
Wherein the first wrapper is wavy from one end of the filter to a waveform defining at least one channel extending in the longitudinal direction of the filter; Wherein the longitudinally extending core of the cigarette smoke filtering material comprises a barrel core of cigarette smoke filtering material having at least one additive pocket fully encapsulated therein,
Single section cigarette smoke filter. 10. The method of claim 9,
Wherein the first wrapper is wavy into a waveform that forms at least five channels extending from one end of the filter to the longitudinal direction of the filter. A filter cigarette comprising a single section cigarette smoke filter according to any one of claims 1 to 10, wherein the filter is connected to a wrapped cigarette bar with the second end of the core towards the cigarette. A multiple bar comprising a plurality of single-section cigarette smoke filters according to any one of claims 1 to 10 connected in end-to-end integrally in mirror image relationship. delete delete delete delete

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