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WO2010115675A1 - Smoking article filter - Google Patents

Smoking article filter Download PDF

Info

Publication number
WO2010115675A1
WO2010115675A1 PCT/EP2010/053093 EP2010053093W WO2010115675A1 WO 2010115675 A1 WO2010115675 A1 WO 2010115675A1 EP 2010053093 W EP2010053093 W EP 2010053093W WO 2010115675 A1 WO2010115675 A1 WO 2010115675A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter material
groove
pocket
periphery
Prior art date
Application number
PCT/EP2010/053093
Other languages
French (fr)
Inventor
John Richardson
Original Assignee
British American Tobacco (Investments) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British American Tobacco (Investments) Limited filed Critical British American Tobacco (Investments) Limited
Publication of WO2010115675A1 publication Critical patent/WO2010115675A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/025—Final operations, i.e. after the filter rod forming process
    • A24D3/0258—Means for making grooves
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives

Definitions

  • the invention relates to a filter for a smoking article such as a cigarette and also to an apparatus for making the filter.
  • smoking articles such as cigarettes may be provided with a filter comprising a plug of filter material such as cellulose acetate tow wrapped in a sheet known as plugwrap.
  • the filter is attached to a rod of tobacco by a further sheet wrapper, known as tipping paper.
  • the invention provides an improved filter for a smoking article comprising an elongate body of first filter material with at least one longitudinal, peripheral groove, and a pocket of second filter material disposed within the first material.
  • the pocket of second material may be disposed in the first material beneath the groove.
  • the body of first filter material may have a generally cylindrical periphery around which a plurality of the longitudinal grooves is regularly spaced.
  • the first filter material may comprise a cellulosic tow and the second filter material may comprise a particulate filter additive such as a particulate carbon containing material.
  • the pocket of second filter material may extend along the longitudinal axis of the body of first filter material so as to be surrounded by the first material.
  • the body of first filter material may be wrapped with a plugwrap around its periphery and in the or each groove.
  • a tipping paper may bridge the or each groove to form a ventilation passageway for ventilation air that may enter through ventilation holes in the tipping paper.
  • the body of first filter material may have a mouth end and a smoking material end, and the or each groove may extend from adjacent the smoking material end and terminate at the mouth end or vice versa.
  • the invention also includes a smoking article comprising the filter and a tobacco rod attached to the filter.
  • the invention further includes a smoking article comprising a rod of smokeable material and a filter attached thereto, the filter comprising a single plug of filter material with longitudinal peripheral grooves configured to receive ventilation air for smoke drawn from the rod through the filter, and a pocket in the filter material between and underlying the grooves, the pocket containing a filter additive.
  • the invention also provides a method of forming a filter for a smoking article, comprising forming in a body of a first filter material a pocket containing a second filter material, and forming at least one longitudinal groove in the periphery of the body of first filter material.
  • an apparatus for manufacturing filters for smoking articles comprising means for forming in a body of a first filter material a pocket containing a second filter material, and means for forming at least one longitudinal groove in the periphery of the body of first filter.
  • An injector may be provided to inject the second filter material in particulate form into the first material to form the pocket and means may be included for indenting the or each groove into the periphery of the body of first filter material.
  • Figure 1 is a schematic illustration of a filter for a cigarette
  • Figure 2 is an illustration of the filter of Figure 1 attached to a rod of tobacco to form a cigarette
  • Figure 3 illustrates schematically the process of attaching the filter to the tobacco rod using tipping paper
  • Figure 4 is a longitudinal sectional view of the cigarette shown in Figure 2;
  • Figure 5 is a side view of the cigarette of Figure 4 showing ventilation holes;
  • Figure 6 is a longitudinal sectional view of the cigarette with an alternative filter configuration;
  • Figure 7 is a schematic illustration of an apparatus for forming filters of the first and second filter materials.
  • Figures 8A & 8B show operation of a device for forming longitudinal peripheral grooves in the filter.
  • a cigarette filter includes a generally cylindrical, elongate body 1 of first filter material, in this example cellulose acetate tow.
  • the outer cylindrical periphery of the body 1 is covered with a plugwrap 2 that comprises sheet material such as paper.
  • a plugwrap 2 that comprises sheet material such as paper.
  • Formed in the cylindrical surface is plurality of longitudinally extending linear grooves 3 that are regularly spaced around the periphery. In this example, four equally spaced grooves are provided.
  • a pocket 4 is formed within the first material that contains a second filter material in the form of a particulate additive, for example carbon particles.
  • the pocket 4 is disposed symmetrically about the cylindrical axis of the body 1.
  • the filter body 1 is attached to a tobacco rod 5 which, in the usual way, comprises tobacco leaf or substitute wrapped in a paper wrapper 6.
  • the body 1 of the filter may be attached to the tobacco rod 5 by means of tipping paper 7 that is glued around the cylindrical periphery of the body 1 and the end of the rod 5.
  • the tipping paper 7 bridges the grooves 3 to form elongate ventilation channels that admit air into the mouth of the smoker.
  • ventilation holes 8 are formed in - A -
  • the tipping paper in alignment with the grooves 3, so that air can be drawn into the grooves by the user for passage to the user's mouth at mouth end 9 of the filter.
  • the grooves 3 extend from mouth end 9 to a position adjacent to but not touching tobacco end 10 of the filter.
  • air is drawn in the direction of arrows X shown in Figure 4 into the grooves 3 for passage out of the mouth end 9 into the user's mouth in the direction of arrows Y.
  • the plugwrap 2 may be air impermeable to ensure that air drawn into the grooves 3 travels longitudinally along them. The air from the grooves mixes in the user's mouth with the mainstream smoke drawn through the body 1 of the filter.
  • the mainstream smoke is filtered both by the carbon containing particles in the pocket 4 and also by means of the cellulose acetate tow that comprises the main body 1 of the filter.
  • particulate carbon can be used to filter vapour phase components from the smoke and the cellulose acetate tow can filter particulate components from the smoke.
  • the pocket 4 containing the particulate carbon material is located within the cellulose acetate tow beneath the grooves and is generally surrounded by the cellulose acetate material.
  • the grooves 3 extend from adjacent the tobacco end 10 of the filter into the mouth end where they terminate in an opening to allow ventilation air to enter the user's mouth.
  • FIG. 6 An alternative configuration is illustrated in Figure 6 in which the grooves 3 are open at the tobacco end 10 to supply ventilation air into the tobacco rod.
  • the grooves 3 terminate adjacent the mouth end 9 and do not provide passageways to the mouth.
  • ventilation air is drawn through ventilation holes 8 into the grooves 3 in the direction on arrows X and passes along the grooves towards the tobacco end 10 to mix with the smoke passing from the tobacco rod into the filter, the ventilation air changing its direction of flow by substantially 180° as indicated by arrows Z so as to travel with the smoke towards the mouth end 9 of the filter .
  • the tipping paper 7 may be provided with transparent portions (not shown) which overlie the grooves 3 in order to reveal to the user the ventilation passageways provided by the grooves.
  • a substantially continuous flow of cellulose acetate tow 12 is fed in the direction of arrow 13 into a funnel 14 to provide a generally cylindrical body of cellulose acetate material 14, which is passed through a garniture 15 that attaches plugwrap to supply it continuously from a reel 16.
  • a particulate additive such as carbon particles is discontinuously fed through an injection device 17 into the tow to form sequential pockets 4 of the particulate material along the axis of the tow 12.
  • Injection device 17 comprises an elongate injection nozzle 18, a reservoir 19 of the particulate material and a supply of compressed gas e.g.
  • the resulting filter material that passes out of the device in direction 21 can subsequently be cut into individual segments for use in making cigarettes.
  • the cut length may be suitable for producing two cigarettes in tandem or individual cigarettes, as required.
  • the cutting may be carried out as a multi stage process in which lengths of filter material for use with multiple cigarettes are first cut and are then later cut into lengths suitable for use in manufacturing cigarettes in tandem or individually.
  • a method of imparting the grooves into the filter 1 is illustrated in Figure 8.
  • a length of the filter rod material produced by the process illustrated in Figure 7, comprising the filter body 1 containing at least one pocket 4, wrapped with plugwrap 2, is placed between first and second plates 22, 23 illustrated in Figure 8A.
  • the plate 23 is heated and provided with elongate groove forming projections 24, one for each of the grooves illustrated in Figure 1.
  • the plate 22, is moved in the direction of arrow 25 over and parallel to the plate 23 with the filter body 1 engaged between the plates as illustrated in Figure 8 A, so as to roll the filter 1 in the direction of arrow 26 over the projections 24.
  • the groove forming projections 24 are driven into the generally cylindrical body 1 and form the grooves 3 in the filter body 1.
  • the plugwrap 2 is driven inwardly into the grooves so as to line both the grooves and the cylindrical exterior periphery of the filter body 1.
  • the resulting grooves are shown in Figure 8B and are generally U shaped although other groove cross sections can be achieved by suitably configuring the groove forming projections 24.
  • the resulting length of filter material 1 can then be cut into suitable length for attachment to one or more tobacco rods 5, for example by the process described with reference to Figure 3.
  • the filter may be compressed between dies mounted with projections configured to form the grooves.
  • the grooves 3 need not extend from one end of the filter to closely adjacent the other end. The grooves could, for instance, extend only halfway along the filter length. This applies to the groove configuration of Figure 4 and in particular to the reverse groove arrangement of Figure 6.
  • grooves have been described as linear grooves that are parallel to the longitudinal axis A-A, other shapes can be used, for example spiral or other serpentine configurations.
  • a liquid could be injected into the pocket 4 rather than particulate material.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

A filter for a smoking article such a cigarette comprises an elongate body (1) of cellulose acetate filter tow formed with longitudinal, peripheral grooves (3), wrapped with tipping paper (7) to form longitudinal ventilation passageways, and a pocket (4) of second filter material such as particulate carbon, disposed within the cellulose acetate tow beneath the groove.

Description

Smoking article filter
Description
The invention relates to a filter for a smoking article such as a cigarette and also to an apparatus for making the filter.
It is well known that smoking articles such as cigarettes may be provided with a filter comprising a plug of filter material such as cellulose acetate tow wrapped in a sheet known as plugwrap. The filter is attached to a rod of tobacco by a further sheet wrapper, known as tipping paper.
The invention provides an improved filter for a smoking article comprising an elongate body of first filter material with at least one longitudinal, peripheral groove, and a pocket of second filter material disposed within the first material.
The pocket of second material may be disposed in the first material beneath the groove.
The body of first filter material may have a generally cylindrical periphery around which a plurality of the longitudinal grooves is regularly spaced. The first filter material may comprise a cellulosic tow and the second filter material may comprise a particulate filter additive such as a particulate carbon containing material. The pocket of second filter material may extend along the longitudinal axis of the body of first filter material so as to be surrounded by the first material.
The body of first filter material may be wrapped with a plugwrap around its periphery and in the or each groove. A tipping paper may bridge the or each groove to form a ventilation passageway for ventilation air that may enter through ventilation holes in the tipping paper.
The body of first filter material may have a mouth end and a smoking material end, and the or each groove may extend from adjacent the smoking material end and terminate at the mouth end or vice versa. The invention also includes a smoking article comprising the filter and a tobacco rod attached to the filter.
The invention further includes a smoking article comprising a rod of smokeable material and a filter attached thereto, the filter comprising a single plug of filter material with longitudinal peripheral grooves configured to receive ventilation air for smoke drawn from the rod through the filter, and a pocket in the filter material between and underlying the grooves, the pocket containing a filter additive.
The invention also provides a method of forming a filter for a smoking article, comprising forming in a body of a first filter material a pocket containing a second filter material, and forming at least one longitudinal groove in the periphery of the body of first filter material.
Further provided according to the invention is an apparatus for manufacturing filters for smoking articles, comprising means for forming in a body of a first filter material a pocket containing a second filter material, and means for forming at least one longitudinal groove in the periphery of the body of first filter.
An injector may be provided to inject the second filter material in particulate form into the first material to form the pocket and means may be included for indenting the or each groove into the periphery of the body of first filter material.
In order that the invention may be more fully understood an embodiment thereof will now be described by way of illustrative example with reference to the accompanying drawings in which:
Figure 1 is a schematic illustration of a filter for a cigarette; Figure 2 is an illustration of the filter of Figure 1 attached to a rod of tobacco to form a cigarette; Figure 3 illustrates schematically the process of attaching the filter to the tobacco rod using tipping paper;
Figure 4 is a longitudinal sectional view of the cigarette shown in Figure 2; Figure 5 is a side view of the cigarette of Figure 4 showing ventilation holes; Figure 6 is a longitudinal sectional view of the cigarette with an alternative filter configuration;
Figure 7 is a schematic illustration of an apparatus for forming filters of the first and second filter materials; and
Figures 8A & 8B show operation of a device for forming longitudinal peripheral grooves in the filter.
Referring to Figure 1, a cigarette filter includes a generally cylindrical, elongate body 1 of first filter material, in this example cellulose acetate tow. The outer cylindrical periphery of the body 1 is covered with a plugwrap 2 that comprises sheet material such as paper. Formed in the cylindrical surface is plurality of longitudinally extending linear grooves 3 that are regularly spaced around the periphery. In this example, four equally spaced grooves are provided.
A pocket 4 is formed within the first material that contains a second filter material in the form of a particulate additive, for example carbon particles. The pocket 4 is disposed symmetrically about the cylindrical axis of the body 1.
As illustrated in Figure 2, the filter body 1 is attached to a tobacco rod 5 which, in the usual way, comprises tobacco leaf or substitute wrapped in a paper wrapper 6. The body 1 of the filter may be attached to the tobacco rod 5 by means of tipping paper 7 that is glued around the cylindrical periphery of the body 1 and the end of the rod 5. The tipping paper 7 bridges the grooves 3 to form elongate ventilation channels that admit air into the mouth of the smoker. To this end, ventilation holes 8 are formed in - A -
the tipping paper in alignment with the grooves 3, so that air can be drawn into the grooves by the user for passage to the user's mouth at mouth end 9 of the filter.
In the embodiment illustrated in Figures 2 to 5, the grooves 3 extend from mouth end 9 to a position adjacent to but not touching tobacco end 10 of the filter. Thus, in use, when the user draws on the cigarette, air is drawn in the direction of arrows X shown in Figure 4 into the grooves 3 for passage out of the mouth end 9 into the user's mouth in the direction of arrows Y. The plugwrap 2 may be air impermeable to ensure that air drawn into the grooves 3 travels longitudinally along them. The air from the grooves mixes in the user's mouth with the mainstream smoke drawn through the body 1 of the filter.
The mainstream smoke is filtered both by the carbon containing particles in the pocket 4 and also by means of the cellulose acetate tow that comprises the main body 1 of the filter. As known in the art, particulate carbon can be used to filter vapour phase components from the smoke and the cellulose acetate tow can filter particulate components from the smoke. The pocket 4 containing the particulate carbon material is located within the cellulose acetate tow beneath the grooves and is generally surrounded by the cellulose acetate material.
Thus, as illustrated in Figure 4, the grooves 3 extend from adjacent the tobacco end 10 of the filter into the mouth end where they terminate in an opening to allow ventilation air to enter the user's mouth.
An alternative configuration is illustrated in Figure 6 in which the grooves 3 are open at the tobacco end 10 to supply ventilation air into the tobacco rod. The grooves 3 terminate adjacent the mouth end 9 and do not provide passageways to the mouth. When the user draws on the cigarette, ventilation air is drawn through ventilation holes 8 into the grooves 3 in the direction on arrows X and passes along the grooves towards the tobacco end 10 to mix with the smoke passing from the tobacco rod into the filter, the ventilation air changing its direction of flow by substantially 180° as indicated by arrows Z so as to travel with the smoke towards the mouth end 9 of the filter .
Additionally, for the example shown in Figure 6, the tipping paper 7 may be provided with transparent portions (not shown) which overlie the grooves 3 in order to reveal to the user the ventilation passageways provided by the grooves.
A method of manufacturing the filter will now be described with reference to Figures 7 and 8. Referring to Figure 7, a substantially continuous flow of cellulose acetate tow 12 is fed in the direction of arrow 13 into a funnel 14 to provide a generally cylindrical body of cellulose acetate material 14, which is passed through a garniture 15 that attaches plugwrap to supply it continuously from a reel 16. A particulate additive such as carbon particles is discontinuously fed through an injection device 17 into the tow to form sequential pockets 4 of the particulate material along the axis of the tow 12. Injection device 17 comprises an elongate injection nozzle 18, a reservoir 19 of the particulate material and a supply of compressed gas e.g. compressed air 20 which can be pulsed in order to produce the sequential pockets 4 of particulate material within the tow 12. The resulting filter material that passes out of the device in direction 21 can subsequently be cut into individual segments for use in making cigarettes. The cut length may be suitable for producing two cigarettes in tandem or individual cigarettes, as required. Also, the cutting may be carried out as a multi stage process in which lengths of filter material for use with multiple cigarettes are first cut and are then later cut into lengths suitable for use in manufacturing cigarettes in tandem or individually. Reference is directed to WO 2006/059134 for further details of a suitable technique for forming the pockets 4 in the tow 12.
A method of imparting the grooves into the filter 1 is illustrated in Figure 8. A length of the filter rod material produced by the process illustrated in Figure 7, comprising the filter body 1 containing at least one pocket 4, wrapped with plugwrap 2, is placed between first and second plates 22, 23 illustrated in Figure 8A. The plate 23 is heated and provided with elongate groove forming projections 24, one for each of the grooves illustrated in Figure 1. The plate 22, is moved in the direction of arrow 25 over and parallel to the plate 23 with the filter body 1 engaged between the plates as illustrated in Figure 8 A, so as to roll the filter 1 in the direction of arrow 26 over the projections 24. The groove forming projections 24 are driven into the generally cylindrical body 1 and form the grooves 3 in the filter body 1. During the process of groom formation, the plugwrap 2 is driven inwardly into the grooves so as to line both the grooves and the cylindrical exterior periphery of the filter body 1. The resulting grooves are shown in Figure 8B and are generally U shaped although other groove cross sections can be achieved by suitably configuring the groove forming projections 24. The resulting length of filter material 1 can then be cut into suitable length for attachment to one or more tobacco rods 5, for example by the process described with reference to Figure 3.
Many modifications and variations fall within the scope of the invention. For example, instead of forming the grooves 3 by rolling the filter plug over a plurality of fixed position groove forming projections, the filter may be compressed between dies mounted with projections configured to form the grooves. Also, the grooves 3 need not extend from one end of the filter to closely adjacent the other end. The grooves could, for instance, extend only halfway along the filter length. This applies to the groove configuration of Figure 4 and in particular to the reverse groove arrangement of Figure 6.
Also, whilst the grooves have been described as linear grooves that are parallel to the longitudinal axis A-A, other shapes can be used, for example spiral or other serpentine configurations.
Additionally, other materials can be used in the pocket 4 and for example a liquid could be injected into the pocket 4 rather than particulate material.

Claims

Claims
1. A filter for a smoking article, comprising an elongate body of first filter material with at least one longitudinal, peripheral groove, and a pocket of second filter material disposed within the first material.
2. A filter according to claim 1 wherein the the pocket of second filter material is disposed within the first material beneath the groove.
3. A filter according to claim 1 or 2 wherein the body of first filter material has a generally cylindrical periphery around which a plurality of the longitudinal grooves is regularly spaced.
4. A filter according to any preceding claim wherein the or each said groove extends from adjacent one end of the body of first filter material and terminates at the other end.
5. A filter according to claim 4 wherein the body of first filter material has a mouth end and a smoking material end, and the or each said groove extends from adjacent the smoking material end and terminates at the mouth end.
6. A filter according to any preceding claim wherein the body of first filter material is wrapped with a plugwrap around its periphery and in the or each groove.
7. A filter according to any preceding claim wherein the body of first filter material is wrapped with a tipping paper around its periphery that bridges the or each groove.
8. A filter according to claim 7 including ventilation holes formed in the tipping paper to allow ventilation air to enter the or each groove.
9. A filter according to any preceding claim wherein the second filter material comprises a particulate filter additive.
10. A filter according to any preceding claim wherein the second filter material comprises a particulate carbon containing material.
11. A filter according to any preceding claim wherein the pocket of second filter material is surrounded by the first filter material.
12. A filter according to any preceding claim wherein the body of first filter material has a longitudinal axis and the pocket of second filter material extends along said axis.
13. A filter according to any preceding claim wherein the first filter material comprises a cellulosic tow.
14. A smoking article comprising a filter according to any preceding claim and a tobacco rod attached to the filter.
15. A smoking article comprising a rod of smokeable material and a filter attached thereto, the filter comprising a single plug of filter material with longitudinal peripheral grooves configured to receive ventilation air , and a pocket in the filter material between and underlying the grooves, the pocket containing a filter additive.
16. A method of forming a filter for a smoking article, comprising forming in a body of a first filter material a pocket containing a second filter material, and forming at least one longitudinal groove in the periphery of the body of first filter material.
17. A method according to claim 16 wherein the second filter material is particulate and including injecting the particulate material into the first material to form said pocket.
18. A method according to claim 16 or 17 including indenting the or each said groove into the periphery of the body of first filter material.
19. Apparatus for manufacturing filters for smoking articles, comprising means for forming in a body of a first filter material a pocket containing a second filter material, and means for forming at least one longitudinal groove in the periphery of the body of first filter material.
20. Apparatus according to claim 19 includes means for injecting the second filter material in particulate form into the first material to form said pocket.
21. Apparatus according to claim 19 or 20 including means for indenting the or each said groove into the periphery of the body of first filter material.
22. A filter or a smoking article substantially as hereinbefore described with reference to the accompanying drawings.
23. A method of making a filter or a smoking article substantially as hereinbefore described with reference to the accompanying drawings.
24. Apparatus for manufacturing filters for smoking articles substantially as hereinbefore described with reference to the accompanying drawings.
PCT/EP2010/053093 2009-04-09 2010-03-11 Smoking article filter WO2010115675A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0906187.0A GB0906187D0 (en) 2009-04-09 2009-04-09 Smoking article filter
GB0906187.0 2009-04-09

Publications (1)

Publication Number Publication Date
WO2010115675A1 true WO2010115675A1 (en) 2010-10-14

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Family Applications (1)

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WO (1) WO2010115675A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013030289A1 (en) * 2011-09-02 2013-03-07 British American Tobacco (Investments) Limited Manufacturing grooved smoking rods
CN103054185A (en) * 2013-02-05 2013-04-24 大亚科技股份有限公司 Activated carbon paper filter tip rod and composite filter tip rod of activate carbon paper
WO2013170526A1 (en) * 2012-05-14 2013-11-21 上海烟草集团有限责任公司 Method and device for forming cigarette filter rod
WO2014020055A1 (en) * 2012-08-01 2014-02-06 Essentra Filter Products Development Co. Pte. Ltd Tobacco smoke filter
JP2021505166A (en) * 2017-12-08 2021-02-18 エッセントラ フィルター プロダクツ ディベロップメント カンパニー プライベート リミティド Cigarette smoke filter

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GB2012554A (en) * 1977-11-18 1979-08-01 Philip Morris Inc Cigarette filter system
US4184412A (en) * 1977-03-18 1980-01-22 Liggett Group Inc. Pocket-type charcoal filter and cigarette made therewith
GB2081066A (en) * 1980-07-11 1982-02-17 Brown & Williamson Tobacco Corp Apparatus and method for making grooves in tobacco-smoke filters
GB2098051A (en) * 1981-05-07 1982-11-17 Filtrona Ltd Tobacco smoke filter and method and apparatus for making same
US4498488A (en) * 1981-03-12 1985-02-12 Brown & Williamson Tobacco Corporation Cigarette filter
US4708150A (en) * 1986-08-25 1987-11-24 Brown & Williamson Tobacco Corporation Cigarette filter
DE10010176A1 (en) * 2000-03-02 2001-09-13 Reemtsma H F & Ph Production of additive-treated filter cable, comprises injecting additive into cable in portions using carrier gas fed though feed pipe
WO2006059134A1 (en) 2004-12-03 2006-06-08 Filtrona International Limited Tobacco smoke filter production
DE102006001445A1 (en) * 2006-01-10 2007-07-19 Hauni Maschinenbau Ag Rod shaped material e.g. cigarette, conveying method for tobacco processing industry, involves moving articles, after their delivery, to receiving cavity in transverse axial manner, where surfaces of articles are processed during movement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184412A (en) * 1977-03-18 1980-01-22 Liggett Group Inc. Pocket-type charcoal filter and cigarette made therewith
GB2012554A (en) * 1977-11-18 1979-08-01 Philip Morris Inc Cigarette filter system
GB2081066A (en) * 1980-07-11 1982-02-17 Brown & Williamson Tobacco Corp Apparatus and method for making grooves in tobacco-smoke filters
US4498488A (en) * 1981-03-12 1985-02-12 Brown & Williamson Tobacco Corporation Cigarette filter
GB2098051A (en) * 1981-05-07 1982-11-17 Filtrona Ltd Tobacco smoke filter and method and apparatus for making same
US4708150A (en) * 1986-08-25 1987-11-24 Brown & Williamson Tobacco Corporation Cigarette filter
DE10010176A1 (en) * 2000-03-02 2001-09-13 Reemtsma H F & Ph Production of additive-treated filter cable, comprises injecting additive into cable in portions using carrier gas fed though feed pipe
WO2006059134A1 (en) 2004-12-03 2006-06-08 Filtrona International Limited Tobacco smoke filter production
DE102006001445A1 (en) * 2006-01-10 2007-07-19 Hauni Maschinenbau Ag Rod shaped material e.g. cigarette, conveying method for tobacco processing industry, involves moving articles, after their delivery, to receiving cavity in transverse axial manner, where surfaces of articles are processed during movement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013030289A1 (en) * 2011-09-02 2013-03-07 British American Tobacco (Investments) Limited Manufacturing grooved smoking rods
WO2013170526A1 (en) * 2012-05-14 2013-11-21 上海烟草集团有限责任公司 Method and device for forming cigarette filter rod
WO2014020055A1 (en) * 2012-08-01 2014-02-06 Essentra Filter Products Development Co. Pte. Ltd Tobacco smoke filter
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