EP0474940A1 - Filtre à fumée concentrique avec des milieux filtrants en câble de filaments et en bande - Google Patents

Filtre à fumée concentrique avec des milieux filtrants en câble de filaments et en bande Download PDF

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Publication number
EP0474940A1
EP0474940A1 EP90313555A EP90313555A EP0474940A1 EP 0474940 A1 EP0474940 A1 EP 0474940A1 EP 90313555 A EP90313555 A EP 90313555A EP 90313555 A EP90313555 A EP 90313555A EP 0474940 A1 EP0474940 A1 EP 0474940A1
Authority
EP
European Patent Office
Prior art keywords
filter
smoking
plug
draw
resistance
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.)
Granted
Application number
EP90313555A
Other languages
German (de)
English (en)
Other versions
EP0474940B1 (fr
EP0474940B2 (fr
Inventor
Cynthia W. Arterbery
W. Timothy Callaham
Gus D. Keritsis
Morris F. White, Jr.
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.)
Philip Morris Products Inc
Philip Morris USA Inc
Original Assignee
Philip Morris Products Inc
Philip Morris USA Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24285429&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0474940(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Philip Morris Products Inc, Philip Morris USA Inc filed Critical Philip Morris Products Inc
Publication of EP0474940A1 publication Critical patent/EP0474940A1/fr
Publication of EP0474940B1 publication Critical patent/EP0474940B1/fr
Application granted granted Critical
Publication of EP0474940B2 publication Critical patent/EP0474940B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
    • 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
    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163—Carbon

Definitions

  • This invention relates to smoking filters, and particularly to concentric smoking filters. More particularly, this invention relates to concentric smoking filters having tow and web filter media portions arranged concentrically.
  • Most smoking filters particularly cigarette filters, sold commercially as part of cigarettes consist of a cylindrical rod or "plug" of a "tow” of plasticized cellulose acetate fibers.
  • Some filters are variants of the standard filter, having recessed mouth ends, or being made of two plugs placed end-to- end with a space in between, the space being either empty or filled with another material such as charcoal. It is also known to provide such filters having multiple plugs abutting one another, the different plugs differing in density or other characteristics.
  • filtering media other than cellulose acetate.
  • One such medium is an appropriate sheet or web material.
  • the web material which is gathered into a cylindrical plug, can be paper or any other web material, including cellulose acetate in sheet form. When such web materials are used as filters, they are frequently corrugated before being gathered. Paper webs may also be creped to improve tensile strength.
  • filters having two or more abutting plugs, at least one of which is cellulose acetate tow, and at least one of which is a web material.
  • Concentric filters in which two different forms of cellulose acetate tow -- differing, e.g., in density -- are formed in to a filter.
  • One cellulose acetate tow forms a cylindrical "core", while the other tow forms an annular peripheral layer.
  • Smoking filters are characterized by various parameters, including pressure drop, which is referred to as resistance-to-draw (“RTD”) and usually measured as the height of a column of water, and efficiency, which is measured as the percentage of the total particulate matter ("TPM”) in the unfiltered smokestream that is trapped by the filter.
  • RTD resistance-to-draw
  • TPM total particulate matter
  • a smoking filter comprising a first filter plug having a central core of a first filter material and a peripheral layer of a second filter material surrounding the central core.
  • One of the first and second filter materials is cellulose acetate tow and the other of the first and second filter materials is a gathered corrugated web material.
  • cigarette 10 includes a tobacco rod 11 and a first preferred embodiment of a filter 12 according to this invention.
  • Tobacco rod 11 is wrapped in conventional wrapper 13, while filter 12 is wrapped by conventional tipping 14.
  • Filter 12 includes cellulose acetate tow peripheral layer 20 and central paper core 21.
  • Cellulose acetate peripheral layer 20 is a conventional cellulose acetate tow, preferably wrapped by porous plug wrap 22, although self-supporting filter rod technology, such as steam bonding or spray coating of the outer surface of peripheral layer 20, can be used to make a filter that need not be wrapped, if desired.
  • Paper core 21 is a paper web that has been corrugated and gathered into cylindrical form and wrapped with plug wrap paper 23.
  • Plug wrap 23 improves the processibility of core 21 as well as its aesthetic appearance, and also helps to assure substantially perfect concentricity. Flavorants or other additives, such as soluble tobacco components, could be applied to plug wrap 23 to enhance the subjective impact of the filtered smoke. A similar result might be achieved by forming plug wrap 23 from a tobacco-containing material, such as reconstituted tobacco sheet. Plug wrap 23 is preferably porous, to allow smoke and air to freely move radially between peripheral layer 20 and core 21. At the same time, the presence of plug wrap 23 helps prevent channelling of smoke along the interface between peripheral layer 20 and core 21.
  • filter 12 has a circumference of about 24.45 mm and an average weight of about 258 mg.
  • the cross-sectional area of core 21 preferably makes up about 60% of the total cross-sectional area of filter 12.
  • Filter 12 preferably has an RTD of between about 130 mm W.G. and about 160 mm W.G., with the RTD of central core 21 being between about 350 mm W.G. and about 450 mm W.G.. More preferably, filter 12 has an RTD of about 146 mm W.G., with the RTD of central core 21 being about 400 mm W.G.
  • the cellulose acetate tow of peripheral layer 20 is preferably an 8.0/30000 cellulose acetate tow having a denier per fiber of 8, a total denier of 30,000, and a "Y" cross-sectional shape.
  • the web of core 21 is preferably a 100% cellulose semi-creped softwood pulp paper with 10% crosswise creping for added tensile strength. Such a paper is available from Tela Toiletfabrik AG, of Balsthal, Switzerland.
  • Cigarette 10 is preferably ventilated to between about 65% and about 75% ventilation, and more preferably about 67% ventilation, with appropriate ventilation holes 15 provided in tipping 14. If the surface of filter 12 is not air permeable, appropriate holes would also be provided in filter 12.
  • FIGS. 3 and 4 show a cigarette 30 having a second preferred embodiment of filter 31 similar in construction to filter 12, except that core 40 is a tow material and peripheral layer 41 is a web material.
  • core 40 is a tow material
  • peripheral layer 41 is a web material.
  • plug wrap 42 is necessary to contain the web material of peripheral layer 41, while plug wrap or other permeable wrap 43 around tow core 40 is optional, as tow core 40 could be made using self-supporting filter rod technology, as above.
  • filter 31 has a circumference of about 24.45 mm and an average weight of about 240 mg.
  • the cross-sectional area of core 40 preferably makes up about 60% of the total cross-sectional area of filter 31.
  • Filter 31 preferably has an RTD of between about 165 mm W.G. and about 195 mm W.G., with the RTD of central core 40 being between about 285 mm W.G. and about 385 mm W.G. More preferably, filter 31 has an RTD of about 182 mm W.G., with the RTD of central core 40 being about 334 mm W.G.
  • the cellulose acetate tow of core 40 is preferably a 1.6/35000 cellulose acetate tow having a denier per fiber of 1.6, a total denier of 35,000, and a "Y" cross-sectional shape.
  • the web of peripheral layer 41 is preferably the same 100% cellulose semi-creped softwood pulp paper, with 10% crosswise creping for added tensile strength, that is used in core 21 of filter 12.
  • Cigarette 30 is preferably ventilated to between about 65% and about 75% ventilation, and more preferably about 67% ventilation, with appropriate ventilation holes 15 provided in tipping 14, as in cigarette 10.
  • FIG. 5 shows a cigarette 50 having a third preferred embodiment of a filter 51 according to the invention.
  • Filter 51 is a so-called “dual" filter, made up of two abutting filter segments 52, 53.
  • Filter segment 52 which is adjacent tobacco rod 11, is a concentric filter as discussed above, in which one of core 54 and peripheral layer 55 is of a web material and the other of core 54 and peripheral layer 55 is of a tow material.
  • Filter segment 53 which is at the mouth end, is a conventional tow filter, such as a cellulose acetate filter, and is provided primarily for cosmetic purposes. Nevertheless, segment 53 has filtration and RTD characteristics, and segment 52 must be adjusted so that the overall filter 51 has the desired characteristics.
  • segment 52 is constructed like filter 12, but has a length of only 18-20 mm, while segment 53 is a 7-9 mm long plug of 2.6/42000 cellulose acetate for tow having a denier per fiber of 2.6, a total denier of 42,000, and a "Y" cross-sectional shape.
  • Total filter RTD is between about 125 mm W.G. and about 175 mm W.G., preferably about 141 mm W.G.
  • the RTD of segment 53 is between about 15 mm W.G. and about 45 mm W.G., preferably about 36 mm W.G.
  • the RTD of segment 52 is between about 85 mm W.G.
  • Cigarette 50 made with this embodiment of filter 51 is ventilated to between about 65% and about 75% ventilation, preferably about 71% ventilation, with appropriate ventilation holes 15 in tipping 14.
  • FIG. 6 shows a cigarette 60 having a fourth embodiment of a filter 61 according to the invention.
  • Filter 61 is a recessed filter, made up of filter segment 62 recessed into tipping 14 at 63.
  • Filter segment 62 which is adjacent tobacco rod 11, is a concentric filter as discussed above, in which one of core 64 and peripheral layer 65 is of a web material and the other of core 64 and peripheral layer 65 is of a tow material.
  • filter parameters discussed herein are given for 85 mm cigarettes. It is to be understood that filters according to the present invention can also be used with longer cigarettes. If a longer cigarette is provided, the filter parameters would have to be adjusted, in accordance with the knowledge of those skilled in the art.
  • the cigarette was smoked in a smoking machine under FTC conditions with the following results:
  • the cigarette which generates 1.5 mg of "tar" was also smoked by expert smokers, who reported that the cigarette had the taste of a cigarette that generates 4-5 mg of "tar”.
  • the filter At 67% ventilation, the filter has an efficiency of about 76%. If there had been no ventilation, the efficiency would have been about 61 %.
  • the cigarette also exhibited a pattern of visible deposition of filtrate on the end of the filter much more like a tow filter as opposed to a web filter, even though most of the filtrate was deposited on the web core. This is believed to be the result of the smoke being forced into core 21 as the ventilation air is introduced at holes 15, and then trying to spread back into peripheral tow layer 20 through permeable wrapper 23.
  • a filter according to the preferred form of the embodiment of FIG. 5 was prepared and mated to an "ultra-light" tobacco rod having the following characteristics:
  • the cigarette was smoked in a smoking machine under FTC conditions with the following results:
  • the filter of this invention will improve the taste of low delivery cigarettes. It is also possible that the filter of this invention may offer similar performance at higher deliveries. For example, a medium delivery cigarette may be perceived as a full-flavor cigarette.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Undergarments, Swaddling Clothes, Handkerchiefs Or Underwear Materials (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
EP90313555A 1990-08-24 1990-12-13 Filtre à fumée concentrique avec des milieux filtrants en câble de filaments et en bande Expired - Lifetime EP0474940B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57187890A 1990-08-24 1990-08-24
US571878 1990-08-24

Publications (3)

Publication Number Publication Date
EP0474940A1 true EP0474940A1 (fr) 1992-03-18
EP0474940B1 EP0474940B1 (fr) 1994-12-14
EP0474940B2 EP0474940B2 (fr) 1999-10-06

Family

ID=24285429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90313555A Expired - Lifetime EP0474940B2 (fr) 1990-08-24 1990-12-13 Filtre à fumée concentrique avec des milieux filtrants en câble de filaments et en bande

Country Status (17)

Country Link
EP (1) EP0474940B2 (fr)
JP (1) JP2767322B2 (fr)
KR (1) KR0175139B1 (fr)
AT (1) ATE115369T1 (fr)
AU (1) AU635095B2 (fr)
CA (1) CA2031727C (fr)
DE (1) DE69015185T3 (fr)
DK (1) DK0474940T4 (fr)
ES (1) ES2066157T5 (fr)
FI (1) FI94385C (fr)
GR (2) GR3015326T3 (fr)
HK (1) HK162995A (fr)
HU (1) HU212772B (fr)
NO (1) NO176464C (fr)
PL (1) PL166314B1 (fr)
RU (1) RU1836040C (fr)
TR (1) TR25717A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0608047A2 (fr) * 1993-01-19 1994-07-27 Philip Morris Products Inc. Filtre à fumée concentrique avec une périphérie en un cordon d'acétate de cellulose et un noyau à partir d'une bande filtrante chargée de particules de carbone
EP0638248A1 (fr) * 1993-08-12 1995-02-15 Philip Morris Products Inc. Procédé et appareil de fabrication de filtres concentriques composés de deux ou plusieurs matériaux
EP0648435A1 (fr) * 1993-10-19 1995-04-19 British-American Tobacco Company Limited Articles à fumer
US5622190A (en) * 1990-08-24 1997-04-22 Philip Morris Incorporated Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
US5746230A (en) * 1990-08-24 1998-05-05 Philip Morris Incorporated Concentric smoking filter having discrete tow and web filter media
EP0875160A1 (fr) * 1997-04-30 1998-11-04 British-American Tobacco (Germany) GmbH Cigarette à filtre ventilée avec un élément de filtre coaxial
EP0880904A1 (fr) 1997-05-30 1998-12-02 British-American Tobacco (Germany) GmbH Cigarette coaxial ultra-légère avec un filtre en plusieurs parties
WO2001064061A1 (fr) * 2000-03-01 2001-09-07 Reemtsma Cigarettenfabriken Gmbh Article a fumer
WO2009156269A1 (fr) * 2008-06-24 2009-12-30 British American Tobacco (Investments) Limited Filtre destiné à un article pour fumeur
US8550092B2 (en) 2007-07-17 2013-10-08 British American Tobacco (Investments) Limited Filter
CN104188106A (zh) * 2014-08-28 2014-12-10 云南中烟工业有限责任公司 一种高截留效率的卷烟滤嘴及应用
EP3643185A4 (fr) * 2017-06-19 2021-05-26 Japan Tobacco, Inc. Filtre d'article à fumer et son procédé de production

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR200001355T2 (tr) * 1997-11-13 2000-09-21 H.F. & Ph.F. Reemtsma Gmbh Gaz fazı indirgenmiş sigara.
GB0816933D0 (en) * 2008-09-16 2008-10-22 British American Tobacco Co Filter for a smoking article
CN101999755A (zh) * 2010-12-17 2011-04-06 南通烟滤嘴有限责任公司 纸芯同轴滤棒
SG10201800520TA (en) 2013-03-28 2018-03-28 Philip Morris Products Sa Smoking article including a flavour delivery member
KR102391290B1 (ko) * 2020-04-22 2022-04-26 주식회사 케이티앤지 흡연 물품용 마우스피스 및 이를 포함하는 흡연 물품 조립체와 흡연 물품 패키지

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396061A (en) * 1964-06-01 1968-08-06 Celanese Corp Smoke filters
DE2558004A1 (de) * 1975-10-30 1977-05-12 Liggett & Myers Inc Zigarettenfilter, verfahren und vorrichtung zu seiner herstellung
FR2368905A1 (fr) * 1976-10-28 1978-05-26 Olin Corp Cigarette aeree aromatisee
US4355995A (en) * 1979-03-27 1982-10-26 American Filtrona Corporation Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same
FR2518374A1 (fr) * 1981-12-18 1983-06-24 Filtrona Ltd Filtre ventile de structure non homogene pour fumee de tabac
DE3207683A1 (de) * 1982-03-03 1983-09-15 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg Filter
FR2524274A1 (fr) * 1982-04-05 1983-10-07 Filtrona Ltd Filtre a cigarette
EP0321740A1 (fr) * 1987-12-22 1989-06-28 British-American Tobacco (Germany) GmbH Cigarette coaxiale
EP0378788A1 (fr) * 1989-01-17 1990-07-25 B.A.T. Cigarettenfabriken GmbH Cigarette à filtre coaxiale

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4119078A (en) 1977-11-18 1980-05-08 Philip Morris Inc Filter system
US4291711A (en) * 1979-03-27 1981-09-29 American Filtrona Corporation Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396061A (en) * 1964-06-01 1968-08-06 Celanese Corp Smoke filters
DE2558004A1 (de) * 1975-10-30 1977-05-12 Liggett & Myers Inc Zigarettenfilter, verfahren und vorrichtung zu seiner herstellung
FR2368905A1 (fr) * 1976-10-28 1978-05-26 Olin Corp Cigarette aeree aromatisee
US4355995A (en) * 1979-03-27 1982-10-26 American Filtrona Corporation Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same
FR2518374A1 (fr) * 1981-12-18 1983-06-24 Filtrona Ltd Filtre ventile de structure non homogene pour fumee de tabac
DE3207683A1 (de) * 1982-03-03 1983-09-15 B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg Filter
FR2524274A1 (fr) * 1982-04-05 1983-10-07 Filtrona Ltd Filtre a cigarette
EP0321740A1 (fr) * 1987-12-22 1989-06-28 British-American Tobacco (Germany) GmbH Cigarette coaxiale
EP0378788A1 (fr) * 1989-01-17 1990-07-25 B.A.T. Cigarettenfabriken GmbH Cigarette à filtre coaxiale

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5622190A (en) * 1990-08-24 1997-04-22 Philip Morris Incorporated Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
US5746230A (en) * 1990-08-24 1998-05-05 Philip Morris Incorporated Concentric smoking filter having discrete tow and web filter media
EP0608047A3 (fr) * 1993-01-19 1994-11-17 Philip Morris Prod Filtre à fumée concentrique avec une périphérie en un cordon d'acétate de cellulose et un noyau à partir d'une bande filtrante chargée de particules de carbone.
EP0608047A2 (fr) * 1993-01-19 1994-07-27 Philip Morris Products Inc. Filtre à fumée concentrique avec une périphérie en un cordon d'acétate de cellulose et un noyau à partir d'une bande filtrante chargée de particules de carbone
EP0638248A1 (fr) * 1993-08-12 1995-02-15 Philip Morris Products Inc. Procédé et appareil de fabrication de filtres concentriques composés de deux ou plusieurs matériaux
EP0648435A1 (fr) * 1993-10-19 1995-04-19 British-American Tobacco Company Limited Articles à fumer
WO1995010951A1 (fr) * 1993-10-19 1995-04-27 Brown & Willamson Tobacco Corporation Articles destines a etre fumes
US5979459A (en) * 1997-04-30 1999-11-09 Brown & Williamson Tobacco Corporation Ventilated filter cigarette with a coaxial filter element
EP0875160A1 (fr) * 1997-04-30 1998-11-04 British-American Tobacco (Germany) GmbH Cigarette à filtre ventilée avec un élément de filtre coaxial
US6089238A (en) * 1997-05-30 2000-07-18 Brown & Williamson Tobacco Corporation Ultralight coaxial cigarette including a multipart filter
EP0880904A1 (fr) 1997-05-30 1998-12-02 British-American Tobacco (Germany) GmbH Cigarette coaxial ultra-légère avec un filtre en plusieurs parties
WO2001064061A1 (fr) * 2000-03-01 2001-09-07 Reemtsma Cigarettenfabriken Gmbh Article a fumer
CZ299205B6 (cs) * 2000-03-01 2008-05-14 Reemtsma Cigarettenfabriken Gmbh Kurácký výrobek
US8550092B2 (en) 2007-07-17 2013-10-08 British American Tobacco (Investments) Limited Filter
US9078471B2 (en) 2007-07-17 2015-07-14 British American Tobacco (Investments) Limited Filter
US10334875B2 (en) 2007-07-17 2019-07-02 British American Tobacco (Investments) Limited Filter
WO2009156269A1 (fr) * 2008-06-24 2009-12-30 British American Tobacco (Investments) Limited Filtre destiné à un article pour fumeur
CN102076231A (zh) * 2008-06-24 2011-05-25 英美烟草(投资)有限公司 用于吸烟制品的过滤嘴
CN104188106A (zh) * 2014-08-28 2014-12-10 云南中烟工业有限责任公司 一种高截留效率的卷烟滤嘴及应用
EP3643185A4 (fr) * 2017-06-19 2021-05-26 Japan Tobacco, Inc. Filtre d'article à fumer et son procédé de production

Also Published As

Publication number Publication date
HUT64455A (en) 1994-01-28
DE69015185T3 (de) 2000-03-09
EP0474940B1 (fr) 1994-12-14
ES2066157T5 (es) 1999-12-16
NO905639L (no) 1992-02-25
CA2031727C (fr) 2001-04-10
NO176464B (no) 1995-01-02
FI906092A0 (fi) 1990-12-11
TR25717A (tr) 1993-09-01
GR3015326T3 (en) 1995-06-30
FI906092A (fi) 1992-02-25
FI94385B (fi) 1995-05-31
AU635095B2 (en) 1993-03-11
DK0474940T3 (da) 1995-04-03
CA2031727A1 (fr) 1992-02-25
RU1836040C (ru) 1993-08-23
DE69015185D1 (de) 1995-01-26
HU908366D0 (en) 1991-07-29
DE69015185T2 (de) 1995-05-24
HU212772B (en) 1996-11-28
ES2066157T3 (es) 1995-03-01
NO176464C (no) 1995-04-12
HK162995A (en) 1995-10-27
AU6774890A (en) 1992-02-27
NO905639D0 (no) 1990-12-28
EP0474940B2 (fr) 1999-10-06
FI94385C (fi) 1995-09-11
KR0175139B1 (ko) 1999-02-18
PL288311A1 (en) 1992-02-24
JP2767322B2 (ja) 1998-06-18
KR920003914A (ko) 1992-03-27
DK0474940T4 (da) 2000-04-03
GR3032144T3 (en) 2000-04-27
PL166314B1 (pl) 1995-05-31
JPH06269270A (ja) 1994-09-27
ATE115369T1 (de) 1994-12-15

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