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WO2010076325A1 - Articles ventilés pour fumeurs - Google Patents

Articles ventilés pour fumeurs Download PDF

Info

Publication number
WO2010076325A1
WO2010076325A1 PCT/EP2009/068000 EP2009068000W WO2010076325A1 WO 2010076325 A1 WO2010076325 A1 WO 2010076325A1 EP 2009068000 W EP2009068000 W EP 2009068000W WO 2010076325 A1 WO2010076325 A1 WO 2010076325A1
Authority
WO
WIPO (PCT)
Prior art keywords
ventilation holes
group
smoking article
filter
article according
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2009/068000
Other languages
English (en)
Inventor
Peter Rex White
Richard Thomas Fiebelkorn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British American Tobacco Investments Ltd IFI
Original Assignee
British American Tobacco Investments Ltd IFI
British American Tobacco Co Ltd
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 Ltd IFI, British American Tobacco Co Ltd filed Critical British American Tobacco Investments Ltd IFI
Publication of WO2010076325A1 publication Critical patent/WO2010076325A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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

Definitions

  • the present invention relates to ventilation holes in a smoking article.
  • Prefabricated smoking articles that comprise a tobacco rod attached to a filter such as cigarettes and superslim cigarettes, often include ventilation holes in the filter.
  • the purpose of the holes is to allow air to enter the filter when a smoker draws on the cigarette. The air mixes with the smoke and other components drawn through the filter from the ignited tobacco and provides dilution.
  • the tipping paper which is wrapped around the cigarette to join the tobacco rod to the filter, may be pre-perforated before wrapping by a mechanical or electrostatic perforating device or by a laser beam.
  • a laser beam may be used to make the holes after the cigarette is assembled, using an on-line or on-machine-line (OML) system.
  • OML on-machine-line
  • the holes are burnt into the filter by the focused laser beam, and hence pass through the paper or papers wrapped around the filter (tipping paper, wrapping paper) and into the acetate tow from which the filter core is made. In all cases, the result is to allow the diluting air to be drawn into the outside regions of the filter.
  • a smoking article comprising a filter core, a wrapper surrounding the filter core, a first group of ventilation holes and a second group of ventilation holes positioned closer to a mouth end of the smoking article than the first group of ventilation holes, wherein at least the first group of ventilation holes extend through the wrapper into the core.
  • the second group of ventilation holes may extend through the wrapper into the core.
  • the second group of ventilation holes may not extend into the filter core.
  • One of the first or second groups of ventilation holes may comprise a deeper group of ventilation holes and the other of the first or second group of ventilation holes may comprise a shallower group of ventilation holes.
  • the deeper group of ventilation holes may be arranged such that air drawn in through the deeper group of holes enters a central region of the filter core.
  • the depth of the deeper group of ventilation holes may be at least 25% of a diameter of the filter core, for example between 25% and 50% of a diameter of the filter core.
  • the depth of the deeper group of ventilation holes may be at least 2mm, for example between 2mm and 3.5mm.
  • the deeper group of ventilation holes may be manufactured using DVOML technology.
  • the shallower group of ventilation holes may be arranged such that air drawn in through the holes enters a peripheral region of the filter core.
  • the depth of the shallower group of ventilation holes may be between 1 and 10% of a diameter of the filter core, for example 10% of a diameter of the filter core or less.
  • the shallower group of ventilation holes may be manufactured using PP or OML technology.
  • the deeper group of ventilation holes may be the first group of ventilation holes and the shallower group of ventilation holes may be the second group of ventilation holes.
  • the filter core may comprise a plurality of filter sections.
  • the wrapper may comprise a porous tipping paper.
  • the wrapper may comprise a plurality of different papers with different gas permeabilities.
  • the tipping paper may comprise two different tipping papers which do not substantially overlap.
  • the wrapper may comprise a buccal proximal tipping paper which is substantially impermeable to gas diffusion, and a buccal distal tipping paper, which is porous to gases.
  • the first and second groups of ventilation holes may be arranged circumferentially as a single row or a narrow circumferential band of several circumferential rows.
  • the smoking article may comprise smokeable material, which may include tobacco, a tobacco derivative, expanded tobacco, reconstituted tobacco or tobacco substitutes, or a heat-not-burn product.
  • smokeable material may include tobacco, a tobacco derivative, expanded tobacco, reconstituted tobacco or tobacco substitutes, or a heat-not-burn product.
  • the smoking article may be a cigarette, which comprises a substantially cylindrical tobacco rod wrapped in cigarette paper and the filter.
  • the function of the ventilation holes is to create differential flows through and across the filter, allowing the optimisation of filtration efficiencies, channelling of smoke through the filter, and the management of dilution and pressure drop through the filter. This is advantageous because in managing the flow of smoke in this fashion, the efficiency of the filtration of the gaseous flow is increased, largely because the smoke is effectively travelling a longer path through the filter, and is spread more evenly throughout the filter material and therefore a greater proportion of the unwanted particulate matter substances are removed. The overall effect is that increased filtration efficiency is obtained. - A -
  • This smoke management feature of the invention has the advantage of maintaining a high pressure difference providing satisfaction for the smoker, while simultaneously facilitating a high level of smoke dilution, with minimal risk of occlusion.
  • the ventilation holes may be located in a zone around the circumference of the filter, approximately 11 to 18 mm from the mouth end of the filter.
  • the second group of ventilation holes, closer to the mouth end of the filter, may be approximately 12 mm from the mouth end of the filter.
  • the first group of ventilation holes, closer to the smokeable material end of the filter, may be approximately 17 mm from the mouth end of the filter.
  • the distance between the first and second groups of ventilation holes may be 5 mm or more.
  • the smoking article according to the invention provides a reduced concentration of harmful particulate matter and gas phase substances in the smoke delivered to the smoker by introducing ambient air into the gaseous flow whenever the smoker inhales on the smoking article.
  • This approach to reducing the concentration of harmful gas phase components has several associated advantages.
  • the consumer continues to receive the desired components and associated taste effects of the gaseous flow.
  • the cooler ambient air lowers the temperature of the smoke entering the mouth and throat, producing a more pleasant and agreeable smoking effect.
  • the provision of the two groups of ventilation holes provides increased smoke dilution whilst maintaining a high pressure difference (PD) when the smoker imparts sucking effort on the smoking article, since external air must be drawn through substantially the entire length of the filter. In this way, an elevated PD is established relative to cigarettes with an equivalent level of smoke dilution.
  • PD pressure difference
  • the smoking article according to the invention provides an increased filtration and dilution of smoke.
  • the two groups of ventilation holes provide increased dilution of gaseous flow with ambient air whilst reducing the probability of occlusion of the holes by a smoker's mouth or fingers.
  • the filtration of smoke to remove total particulate matter is maximised, and the PD is maintained at a high level.
  • Figure 1 is a cross sectional view through a smoking article comprising a first group of upstream ventilation holes having air conduits into a filter core, and a second group of downstream ventilation holes which do not.
  • Figure 2 is a cross sectional view through a smoking article having a multi section filter comprising three filter sections, and further having a first group of upstream ventilation holes having air conduits into the filter core and a second group of downstream ventilation holes which do not.
  • Figure 3 is a cross sectional view through a smoking article similar to that shown in Figure 2, comprising a porous tipping paper and a non-porous tipping paper.
  • Figure 4 is a cross sectional view through a smoking article comprising a first group of upstream ventilation holes having air conduits into a filter core, and a second group of downstream ventilation holes having air conduits into the filter core of approximately the same depth as the ventilation holes of the first group.
  • Figure 5 is a cross sectional view through a smoking article comprising a first group of upstream ventilation holes having air conduits into a filter core, and a second group of downstream ventilation holes having air conduits into the filter core which are shallower than the air conduits of the first group.
  • Figure 6 is a cross sectional view through a smoking article comprising a first group of upstream ventilation holes having air conduits into a filter core, and a second group of downstream ventilation holes having air conduits into the filter core which are deeper than the air conduits of the first group.
  • FIG. 1 shows a smoking article 40 comprising a filter 10.
  • the filter 10 comprises a substantially cylindrical filter core 20 wrapped in a plug wrap 22 around its circumferential surface.
  • the smoking article also comprises a cylindrical rod of smokeable material 12 aligned with the filter 10 such that the end of the tobacco rod 12 abuts the end of the filter 10.
  • the tobacco rod is wrapped in a paper wrapper 19, and is joined to the filter 10 by tipping paper 16 in a conventional manner.
  • the smoking article is a cigarette and the smokeable material is tobacco.
  • the filter core 20 comprises a cylindrical core of filter material having a buccal proximal end, or mouth end, and a smokeable material end.
  • the filter core 20 may comprise one or a plurality of abutted cylindrical filter sections made of similar or different filter materials, as shown in Figure 2.
  • the filter core 20 may comprise a single section comprising a continuous length of filter material as shown in Figure 1.
  • the filter material may be formed from cellulose acetate tow, but may alternatively or additionally comprise carbonaceous material, for example, activated charcoal, a resin material such as amberlite or duolite, and/or catalytic material.
  • the filter section(s) may be composed of materials with equal or different pressure drop capacities
  • the filter comprises three longitudinally aligned sections of filter medium 3, 4, 5 wrapped in porous plug wrap 22, and tipping paper 16.
  • the tipping paper may consist of one or a plurality of different types of papers, which may have different porosities to air and other gases, and may differ with regards other specific properties such as propensity to absorb moisture.
  • two types of tipping paper 16, 17 are used.
  • the two filter sections 3, 4 proximal to the tobacco rod 12 are wrapped in porous tipping paper 16 through which vapours and gases such as carbon monoxide can diffuse.
  • vapours and gases such as carbon monoxide can diffuse.
  • Clearly some external air will also be drawn into the filter through this porous tipping paper 16.
  • the filter portion 5 adjacent to the mouth end of the filter is wrapped in an unperforated, essentially impervious tipping paper 17.
  • only porous tipping paper 16 is used to wrap the filter core 20.
  • the tipping paper 16 serves to attach the filter 10 to the tobacco rod 12. This attachment may be by a conventional means such as an adhesive layer between the tipping paper 16 and the paper wrapper 19 surrounding the tobacco rod 12. In alternative embodiments the filter 10 and rod of smokeable material 12 may be attached by any other suitable means.
  • ventilation holes 18 in the filter allow ambient air 26 to become drawn into the filter core 20 upon inhalation by the smoker.
  • the filter 10 is ventilated by means of two groups 32, 34 of ventilation holes 18.
  • Each ventilation hole 18 may comprise a perforation in the wrapper 16, 22 surrounding the filter core 20.
  • the perforations penetrate the porous tipping paper 16 and plug wrap 22.
  • the ventilation holes 18 may further comprise an air conduit in the filter material to allow air to be drawn towards the centre of the filter core 20 to mix with the smoke 28 drawn from the smokeable material 12. This is explained in more detail below.
  • the first and second groups 32, 34 of ventilation holes 18 may be arranged circumferentially as a single row or a narrow band of several rows. As shown in Figure 1 , a first group 32 of ventilation holes 18 may be located substantially towards the boundary between the filter 10 and tobacco rod 12, whilst a second group 34 may be situated closer to the mouth end of the filter 10, in a more buccal proximal position.
  • first group 32 of ventilation holes 18 may be located between the longitudinal midpoint of the filter 10 and the smokeable material end of the filter 10.
  • the second group 34 of ventilation holes 18 may be located between the longitudinal midpoint of the filter 10 and the mouth end of the filter 10.
  • the ventilation holes 18 may be located in a zone around the circumference of the filter 10, approximately 11 to 18 mm from the mouth end of the filter 10.
  • the second group 34 of ventilation holes 18 may be approximately 12 mm from the mouth end of the filter 10.
  • the first group 32 of ventilation holes 18 may be approximately 17 mm from the mouth end of the filter 10.
  • the longitudinal distance S between the first and second groups 32, 34 of ventilation holes 18 may be 5mm or more.
  • the diameter of the ventilation holes 18 may be between lO ⁇ m and lOO ⁇ m. Alternatively, the diameter of the ventilation holes 18 may be between lOO ⁇ m and lmm, or between lmm and 2mm, depending on the method of manufacture.
  • each group of ventilation holes 18 is arranged as a single circumferential row. If the filter is a multi-section filter, the perforations for the first group 32 of ventilation holes 18 may be aligned with the filter section 3 which is proximal to the tobacco rod 12, whilst the perforations for the second group 34 of ventilation holes 18 may be aligned with the central filter section 4.
  • both sets of perforations puncture both the porous tipping paper 16 and the plug wrap 22 such that air is able to pass directly into the filter core 20.
  • the buccal proximal, or mouth end perforations may only pierce the porous tipping paper 16. However, air may still be able to pass into the filter material through the perforation due to the porous nature of the plug wrapping paper 22.
  • smoke is drawn along the tobacco rod 12 and diluted in the filter 10 with ambient air that is drawn into the filter 10 via the two groups 32, 34 of ventilation holes 18.
  • Ambient air may also be drawn into the filter 10 through the porous tipping paper 16.
  • the volume of air drawn through the porous tipping paper 16 may be small in comparison to that drawn through the ventilation holes 18.
  • the first and second groups 32, 34 of ventilation holes 18 may not be identical.
  • one group 32, 34 of ventilation holes 18 may be pre-perforated (PP) using an array of pins, or may be manufactured using OML technology.
  • the other group may be manufactured using DVOML technology.
  • the PP or OML group 32, 34 of ventilation holes 18 may penetrate only the tipping paper 16 or the tipping paper 16 and plug wrap 22, whilst the DVOML group of ventilation holes 18 may additionally include an air conduit which penetrates deep into the filter material 20 towards the centre of the filter core. More detailed examples are described below.
  • the first group 32 of ventilation holes 18, closer to the smokeable material comprise perforations in the tipping paper 16 and plug wrap 22, and an air conduit which extends into the filter core 20 towards the centre of the filter core 20.
  • the second group 34 of ventilation holes 18 comprise only perforations in the tipping paper 16 and plug wrap 22.
  • the depth of the air conduits in the first group 32 of ventilation holes 18 may be relatively shallow, for example 1% to 5% of the diameter of the filter 10, or 5% to 10% of the diameter of the filter 10. Ambient air is introduced into the filter material through the ventilation holes 18 when a smoker draws on the smoking article.
  • Dividing the ventilation zone between two longitudinally spaced groups of ventilation holes 18 provides an advantage over the use of a single band of ventilation holes because some of the ventilation is moved away from the mouth end of the smoking article, thereby reducing the probability of ventilation being prevented by occlusion.
  • the use of two groups 32, 34 may also be used to increase the overall level of ventilation, since a greater number of holes may be provided.
  • each of the ventilation holes 18 in both of the first group 32 and the second group of ventilation holes 18 comprise a perforation in the tipping paper 16 and plug wrap 22, and an air conduit which extends into the filter core 20 towards the centre of the filter core 20.
  • the depth of the air conduit may be relatively shallow, for example 1% to 5% of the diameter of the filter 10, or 5% to 10% of the diameter of the filter 10.
  • FIG. 5 A further example is shown in Figure 5, in which the first group 32 of ventilation holes 18 penetrate both the porous tipping paper 16, the plug wrap 22 and extend deep into the filter core section 3 proximal to the smokeable material such that each ventilation hole 18 comprises an air conduit which extends towards the diametric centre of the core of filter material.
  • the first group 32 of ventilation holes 18 may be made using a DVOML system. However, alternative methods may be used.
  • the air conduits of the first group 32 of ventilation holes 18 may have a depth of at least 2 mm.
  • the first group 32 of ventilation holes 18 may each have a depth of between 2mm and 3.5 mm.
  • Each of the first group 32 of ventilation holes 18 may alternatively have a depth that is at least 25% of the diameter of the filter 10 and may have a maximum depth of 50% of the diameter of the filter 10.
  • the second group 34 of ventilation holes 18 comprise perforations in the tipping paper 16 and plug wrap 22, and a relatively shallow air conduit into the filter core 20 in comparison to the first group 32 of ventilation holes 18.
  • the second group 34 of ventilation holes 18 introduce ambient air into diametrically peripheral areas of the filter core 20 when the smoker draws on the smoking article. This has the effect of reducing the relative concentration of the tobacco smoke 28 at the peripheral areas. Some of the tobacco smoke 28 will be forced into a more central position in the filter core 20 and further mix with the air that was drawn into the filter 10 through the first group 32 of ventilation holes 18.
  • the depth of the air conduits of the second group 34 of ventilation holes 18 may be, for example 1% to 5% of the diameter of the filter 10, or 5% to 10% of the diameter of the filter 10.
  • the second group 34 of ventilation holes 18 may comprise only perforations in the tipping paper 16 and plug wrap 22, without ait conduits into the filter core 20.
  • the second group 34 of ventilation holes 18 may be formed using OML technology.
  • first and second groups of ventilation holes creates a diffusion zone at the exterior surface of the filter 10.
  • the diffusion zone is located between the first group 32 of ventilation holes 18 and the second group of ventilation holes 32.
  • the diffusion zone is located between the second group 34 of ventilation holes 18 and the mouth end of the filter 10.
  • smoke 28 is concentrated at the periphery of the smokeable material in the filter core 20 and may diffuse out of the core 20 through the porous plug wrap 22 and tipping paper 16.
  • the first group 32 of ventilation holes 18 may comprise perforations in the tipping paper 16 and plug wrap 22, and a relatively shallow air conduit into the filter core 20.
  • the first group of ventilation holes 18 will therefore introduce ambient air into diametrically peripheral areas of the filter core 20 when the smoker draws on the smoking article. This has the effect of reducing the relative concentration of the tobacco smoke at the peripheral areas. Some of the tobacco smoke will be forced into a more central position in the filter core 20, and some of the smoke may diffuse out of the filter 10 through the porous plug wrap 22.
  • the depth of the air conduits of the first group 32 of ventilation holes 18 may be, for example 1% to 5% of the diameter of the filter 10, or 5% to 10% of the diameter of the filter 10.
  • the first group 32 of ventilation holes 18 may be formed using OML technology.
  • the second group 34 of ventilation holes 18 may penetrate both the porous tipping paper 16, the plug wrap 22 and extend deep into the filter core section 3 proximal to the smokeable material such that each ventilation hole 18 comprises an air conduit which extends towards the diametric centre of the core of filter material.
  • the second group 34 of ventilation holes 18 may be made using a DVOML system. However, alternative methods may be used.
  • the second group 34 of ventilation holes 18 may have a depth of at least 2 mm. Alternatively, the second group 34 of ventilation holes 18 may have a depth of between 2mm and 3.5 mm.
  • the second group 34 of ventilation holes 18 may have a depth that is at least 25% of the diameter of the filter 10 and may have a maximum depth of 50% of the diameter of the filter 10.
  • the second group 34 of ventilation holes 18 may therefore have the effect of concentrating the tobacco smoke towards peripheral areas of the filter material, i.e. close to the circumferential boundary of the core of filter material. Therefore, unwanted gases such as carbon monoxide can diffuse through the porous tipping paper 16 and porous plug wrap 22 more readily than would be the case in a standard filter construction due to the increased concentration of these gases near the surface of the filter. This reduces the concentration of unwanted gases reaching the smoker at the mouth end of the filter.
  • the first and second groups 32, 34 of ventilation holes 18 create differential gaseous flows through and across the filter 10, allowing the optimisation of filtration efficiencies, channelling of smoke through the filter 10, and the management of dilution and pressure drop through the filter 10. Furthermore, the majority of the ventilation occurs away from the buccal proximal end, or mouth end, of the filter 10, thus minimising the risk of occlusion by the smoker.

Landscapes

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

Abstract

La présente invention concerne un article pour fumeurs (40) comprenant une garniture filtrante (20), une enveloppe (22) entourant la garniture filtrante, des trous de ventilation réunis en un premier groupe (32) et des trous de ventilation réunis en un second groupe (34). Sur l'article pour fumeurs, les trous de ventilation du second groupe sont plus proches de l'extrémité destinée à la bouche que les trous de ventilation du premier groupe. En l'occurrence, les trous de ventilation du premier groupe traversent l'enveloppe et pénètrent dans la garniture filtrante.
PCT/EP2009/068000 2008-12-31 2009-12-29 Articles ventilés pour fumeurs Ceased WO2010076325A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0823669.7 2008-12-31
GBGB0823669.7A GB0823669D0 (en) 2008-12-31 2008-12-31 Ventilated smoking article

Publications (1)

Publication Number Publication Date
WO2010076325A1 true WO2010076325A1 (fr) 2010-07-08

Family

ID=40352550

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/068000 Ceased WO2010076325A1 (fr) 2008-12-31 2009-12-29 Articles ventilés pour fumeurs

Country Status (3)

Country Link
AR (1) AR076454A1 (fr)
GB (1) GB0823669D0 (fr)
WO (1) WO2010076325A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013572A1 (fr) * 2010-07-29 2012-02-02 British American Tobacco (Investments) Limited Filtre pour article à fumer
CN103404968A (zh) * 2013-07-04 2013-11-27 丁铜 一种香烟
CN103974636A (zh) * 2011-12-09 2014-08-06 日本烟草产业株式会社 吸烟物品、过滤嘴
CN109998161A (zh) * 2019-04-29 2019-07-12 云南中烟工业有限责任公司 一种具有通风窗的加热不燃烧卷烟烟支
WO2021012349A1 (fr) * 2019-07-24 2021-01-28 广东中烟工业有限责任公司 Filtre d'embout buccal et cigarette ayant une ventilation variable
CN112788955A (zh) * 2019-08-23 2021-05-11 韩国烟草人参公社 适用三重护理烟味减少技术的吸烟制品
US11006663B2 (en) 2015-03-27 2021-05-18 Philip Morris Products S.A. Smoking article with a mouth end cavity and ventilation
JP2021520787A (ja) * 2018-07-04 2021-08-26 ケーティー・アンド・ジー・コーポレーション シガレット

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150414A (en) * 1983-12-05 1985-07-03 Brown & Williamson Tobacco Corp Cigarette having a mouthpiece and method of making same
GB2161362A (en) * 1984-06-22 1986-01-15 British American Tobacco Co Improvements relating to smoking article mouthpiece elements
US4644963A (en) * 1984-05-19 1987-02-24 British-American Tobacco Company Limited Smoking articles
US5396910A (en) * 1993-11-24 1995-03-14 R. J. Reynolds Tobacco Company Cigarette filter
WO2009144499A2 (fr) * 2008-05-30 2009-12-03 British American Tobacco (Investments) Limited Ventilation pour filtre d’article de tabac

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150414A (en) * 1983-12-05 1985-07-03 Brown & Williamson Tobacco Corp Cigarette having a mouthpiece and method of making same
US4644963A (en) * 1984-05-19 1987-02-24 British-American Tobacco Company Limited Smoking articles
GB2161362A (en) * 1984-06-22 1986-01-15 British American Tobacco Co Improvements relating to smoking article mouthpiece elements
US5396910A (en) * 1993-11-24 1995-03-14 R. J. Reynolds Tobacco Company Cigarette filter
WO2009144499A2 (fr) * 2008-05-30 2009-12-03 British American Tobacco (Investments) Limited Ventilation pour filtre d’article de tabac

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013572A1 (fr) * 2010-07-29 2012-02-02 British American Tobacco (Investments) Limited Filtre pour article à fumer
CN103974636A (zh) * 2011-12-09 2014-08-06 日本烟草产业株式会社 吸烟物品、过滤嘴
CN103974636B (zh) * 2011-12-09 2017-06-23 日本烟草产业株式会社 吸烟物品、过滤嘴
CN103404968A (zh) * 2013-07-04 2013-11-27 丁铜 一种香烟
US11006663B2 (en) 2015-03-27 2021-05-18 Philip Morris Products S.A. Smoking article with a mouth end cavity and ventilation
JP2021520787A (ja) * 2018-07-04 2021-08-26 ケーティー・アンド・ジー・コーポレーション シガレット
JP7120715B2 (ja) 2018-07-04 2022-08-17 ケーティー アンド ジー コーポレイション シガレット
CN109998161A (zh) * 2019-04-29 2019-07-12 云南中烟工业有限责任公司 一种具有通风窗的加热不燃烧卷烟烟支
WO2021012349A1 (fr) * 2019-07-24 2021-01-28 广东中烟工业有限责任公司 Filtre d'embout buccal et cigarette ayant une ventilation variable
CN112788955A (zh) * 2019-08-23 2021-05-11 韩国烟草人参公社 适用三重护理烟味减少技术的吸烟制品

Also Published As

Publication number Publication date
AR076454A1 (es) 2011-06-15
GB0823669D0 (en) 2009-02-04

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