EP0481596B1 - Filter mouthpiece for smoking articles - Google Patents

Filter mouthpiece for smoking articles Download PDF

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Publication number
EP0481596B1
EP0481596B1 EP91307950A EP91307950A EP0481596B1 EP 0481596 B1 EP0481596 B1 EP 0481596B1 EP 91307950 A EP91307950 A EP 91307950A EP 91307950 A EP91307950 A EP 91307950A EP 0481596 B1 EP0481596 B1 EP 0481596B1
Authority
EP
European Patent Office
Prior art keywords
filter
mouthpiece
tube
cigarette
rod
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.)
Revoked
Application number
EP91307950A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0481596A1 (en
Inventor
Daniel Braem
Ahmed Gawad
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 SA
Original Assignee
Fabriques de Tabac Reunies SA
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=10683853&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0481596(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fabriques de Tabac Reunies SA filed Critical Fabriques de Tabac Reunies SA
Publication of EP0481596A1 publication Critical patent/EP0481596A1/en
Application granted granted Critical
Publication of EP0481596B1 publication Critical patent/EP0481596B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure

Definitions

  • the present invention relates to an improved filter mouthpiece for a smoking article, such as a cigarette, in particular a filter mouthpiece having a hollow tube extending axially therethrough, and to a cigarette provided with such a mouthpiece, see EP-A-0 295 835.
  • the resistance to draw and air ventilation, if any, of the combined tobacco rod and filter mouthpiece stay substantially the same throughout the smoking of the cigarette.
  • This has the effect of increasing the dry particulate matter (DPM) delivery with successive puffs.
  • DPM dry particulate matter
  • this may be undesirable since the first puff may be rather weak in taste and "impact” and, anyway, the taste and "impact” of the cigarette to the smoker will change as the cigarette is smoked.
  • RTD resistance to draw
  • a filter mouthpiece having a hollow tube extending from the tobacco end thereof toward, but ending short of, the mouth end.
  • smoke passes along the tube toward the mouth end and impinges on the filter material at the mouth end of the tube.
  • Components of the smoke condense on the filter material adjacent the open mouth end of the tube, blocking the tube and causing at least some of the smoke to pass through the surrounding filter material, so increasing the resistance to draw of the cigarette. This has the effect of evening out to some extent the DPM delivery as smoking progresses.
  • a ventilated filter mouthpiece that is one in which ambient air is admitted to the filter by means of, for example, perforate tipping, provided with a perforate tube open at both ends, extending from the tobacco rod end of the filter toward but not so far as the mouth end of the filter.
  • a filter mouthpiece With such a filter mouthpiece a cigarette can be provided which, when smoked, displays a substantially constant DPM (dry particulate matter) delivery.
  • the mouthpiece can be configured to provide an initially high DPM delivery, which rapidly drops to a lower level and maintains that lower level substantially throughout the smoking of the cigarette.
  • filter mouthpieces of the foregoing type may exhibit significant variation in smoking characteristics, which may not be commercially acceptable.
  • the inventors have found that by providing a further filter portion, between the tobacco rod end of the tube and the tobacco rod, a mouthpiece exhibiting more consistent smoking properties, and thus greater commercial acceptability, results.
  • a filter mouthpiece for a smoking article comprising a filter rendered generally air impermeable over its peripheral surface, the filter comprising a rod-end filter portion, a middle filter portion having a tube extending axially therethrough, the tube being open at both ends; and a mouth-end filter portion.
  • the peripheral surface of the filter mouthpiece is rendered air transmissive over at least one discrete area to admit air into the filter.
  • the filter portions may be three separate lengths of filter, or two or all three portions may be formed of the same length of filter.
  • the rod end filter portion abuts the middle filter portion.
  • the wall of the tube extending through the middle filter portion is pervious to smoke, and particularly preferably has holes for the passage of smoke.
  • Preferred specifications for filter mouthpieces according to the invention are as follows:
  • the filter portions may be of cellulose acetate, crepe paper or other suitable materials
  • the tube may be of cellulose acetate, polypropylene or other suitable material.
  • the tube may be formed by a bore through the middle filter portion, the walls of which are partially sealed, for example by heating, or completely sealed and subsequently perforated.
  • Smoking articles such as cigarettes, having filter mouthpieces according to the invention, are also provided.
  • the cigarette of the drawing comprises a wrapped tobacco rod 10 and a filter mouthpiece 12 according to a preferred embodiment of the invention.
  • the mouthpiece 12 comprises a rod-end filter portion 14 abutting and in axial alignment with the tobacco rod 10, a middle filter portion 16 abutting and in axial adjustment with the rod-end portion 14, and a mouth-end filter portion 18 abutting and in axial alignment with the middle portion 16. All three filter portions are wrapped with an air permeable wrapper 20, and are joined together by an air permeable overwrap 22. They are attached to the tobacco rod 10 by a substantially air impermeable tipping 24, which extends around all three wrapped filter portions and the mouth end of the wrapped tobacco rod 10.
  • the middle filter portion 16 has a tube 26 running down its centre, the walls of which are perforated by holes 28, and the ends of which are open. Preferably five diametrically opposed pairs of holes 28 are provided along the length of the tube 26.
  • the tipping 24 has perforations 30 in the region of the middle filter portion 16, through which ambient air is admitted into the filter.
  • a smoking article including a filter mouthpiece according to the invention When a smoking article including a filter mouthpiece according to the invention is smoked, smoke initially substantially by-passes the middle filter portion 16, travelling instead along the tube 26. The smoke is only filtered by the rod-end 14 and mouth-end 18 filter portions. As smoking progresses, DPM condenses in the mouth-end filter portion 18, adjacent the open end of the tube 26. In the case of a perforate tube, the smoke then leaves the tubes through the holes 28 nearest the mouth end of the tube, and is thus subjected to a higher degree of filtration. The holes 28 become blocked progressively, subjecting to the smoke to progressively higher degrees of filtration.
  • the DPM delivery against the puff number was determined for three cigarettes; a cigarette (C1) having a filter mouthpiece according to the invention with a perforate tube 26 (solid line); a cigarette (C2) having a filter mouthpiece according to the invention with an impervious tube 26 (chain line); and a reference cigarette (C4) having a standard filter mouthpiece (dotted line).
  • Both the cigarettes having filter mouthpieces according to the invention exhibit a much flatter delivery profile than the standard cigarette, and the profile of the cigarette which has the filter mouthpiece with a perforate tube is somewhat flatter than that with an imperforate tube.
  • Filter mouthpieces according to the invention exhibit greater consistency of delivery than those of EP 0 295 835, even through the latter exhibit a relatively flat delivery profile.
  • Table 1 compares total particulate matter (TPM) delivery of a sample of 40 of each of four cigarettes: a cigarette (C1) having a filter mouthpiece according to the invention with a perforate tube 26; a cigarette (C2) having a filter mouthpiece according to the invention with an impervious tube 26; a cigarette (C3) having a filter mouthpiece according to EP 0 295 835, that is, a filter mouthpiece composed of rod-end and mouth-end filter portions only, with a perforate tube extending through the rod-end portion; and a reference cigarette (C4) having a standard cellulose acetate filter mouthpiece.
  • Cigarettes C1, C2 and C4 are those whose delivery profiles were determined as discussed above. Smoke analysis was conducted according to ISO norm.
  • cigarettes (C1) and (C2) equipped with filter mouthpieces according to this invention show significantly more consistent TPM deliveries than cigarettes (C3) having filter mouthpieces according to EP 0 295 835.
  • the standard deviations in TPM delivery of both cigarettes (C1) and (C2), having filter mouthpieces according to the invention are closer to that of cigarette (C4), having a standard filter mouthpiece.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Nozzles (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Surgical Instruments (AREA)
  • Networks Using Active Elements (AREA)
EP91307950A 1990-10-17 1991-08-30 Filter mouthpiece for smoking articles Revoked EP0481596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9022530 1990-10-17
GB909022530A GB9022530D0 (en) 1990-10-17 1990-10-17 Filter mouthpiece for smoking articles

Publications (2)

Publication Number Publication Date
EP0481596A1 EP0481596A1 (en) 1992-04-22
EP0481596B1 true EP0481596B1 (en) 1994-01-05

Family

ID=10683853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91307950A Revoked EP0481596B1 (en) 1990-10-17 1991-08-30 Filter mouthpiece for smoking articles

Country Status (9)

Country Link
EP (1) EP0481596B1 (no)
AT (1) ATE99504T1 (no)
DE (1) DE69100939T2 (no)
DK (1) DK0481596T3 (no)
ES (1) ES2047986T3 (no)
FI (1) FI914887A (no)
GB (1) GB9022530D0 (no)
NO (1) NO177033C (no)
TR (1) TR25451A (no)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7878963B2 (en) 2006-03-28 2011-02-01 Philip Morris Usa Inc. Smoking article with a restrictor
US7987856B2 (en) 2005-12-29 2011-08-02 Philip Morris Usa Inc. Smoking article with bypass channel
US8235057B2 (en) 2007-03-09 2012-08-07 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US8235056B2 (en) 2006-12-29 2012-08-07 Philip Morris Usa Inc. Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system
US8240315B2 (en) 2005-12-29 2012-08-14 Philip Morris Usa Inc. Smoking article with improved delivery profile
US8353302B2 (en) 2007-03-09 2013-01-15 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US8353298B2 (en) 2006-07-12 2013-01-15 Philip Morris Usa Inc. Smoking article with impaction filter segment
US8424539B2 (en) 2006-08-08 2013-04-23 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US8424540B2 (en) 2009-10-09 2013-04-23 Philip Morris Usa Inc. Smoking article with valved restrictor
US8434499B2 (en) 2009-10-09 2013-05-07 Philip Morris Usa Inc. Filter design for improving sensory profile of carbon filter-tipped smoking articles
US8905037B2 (en) 2009-10-15 2014-12-09 Philip Morris Inc. Enhanced subjective activated carbon cigarette
US9138016B2 (en) 2010-03-26 2015-09-22 Philip Morris Usa Inc. Smoking articles with significantly reduced gas vapor phase smoking constituents

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435326A (en) * 1993-07-27 1995-07-25 R. J. Reynolds Tobacco Company Controlled delivery smoking article and method
GB0800216D0 (en) * 2008-01-07 2008-02-13 British American Tobacco Co Smoking article
WO2024142167A1 (ja) * 2022-12-26 2024-07-04 日本たばこ産業株式会社 香味吸引物品用のフィルタ部および香味吸引物品

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1446636A (fr) * 1965-01-11 1966-07-22 Rech S Tech Ets De Procédé pour noyer des corps capillaires dans une matière de remplissage
GB1527705A (en) * 1976-03-01 1978-10-11 Liggett & Myers Inc Cigarette filter
NL7712441A (nl) * 1977-11-11 1979-05-15 Laurens Sigaretten Sigarettefilter en filtersigaret.
GB2091078B (en) * 1981-01-15 1984-11-21 Filtrona Ltd Ventilated cigarette filter
GB8506594D0 (en) * 1985-03-14 1985-04-17 British American Tobacco Co Smoking article filters
GB8713904D0 (en) * 1987-06-15 1987-07-22 Tabac Fab Reunies Sa Filter for smoking articles

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7987856B2 (en) 2005-12-29 2011-08-02 Philip Morris Usa Inc. Smoking article with bypass channel
US8240315B2 (en) 2005-12-29 2012-08-14 Philip Morris Usa Inc. Smoking article with improved delivery profile
US9060546B2 (en) 2006-03-28 2015-06-23 Philip Morris Usa Inc. Smoking article with a restrictor
US7878963B2 (en) 2006-03-28 2011-02-01 Philip Morris Usa Inc. Smoking article with a restrictor
US8353298B2 (en) 2006-07-12 2013-01-15 Philip Morris Usa Inc. Smoking article with impaction filter segment
US8424539B2 (en) 2006-08-08 2013-04-23 Philip Morris Usa Inc. Smoking article with single piece restrictor and chamber
US8235056B2 (en) 2006-12-29 2012-08-07 Philip Morris Usa Inc. Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system
US8353302B2 (en) 2007-03-09 2013-01-15 Philip Morris Usa Inc. Smoking articles with restrictor and aerosol former
US8235057B2 (en) 2007-03-09 2012-08-07 Philip Morris Usa Inc. Smoking article with open ended filter and restrictor
US8424540B2 (en) 2009-10-09 2013-04-23 Philip Morris Usa Inc. Smoking article with valved restrictor
US8434499B2 (en) 2009-10-09 2013-05-07 Philip Morris Usa Inc. Filter design for improving sensory profile of carbon filter-tipped smoking articles
US8905037B2 (en) 2009-10-15 2014-12-09 Philip Morris Inc. Enhanced subjective activated carbon cigarette
US9138016B2 (en) 2010-03-26 2015-09-22 Philip Morris Usa Inc. Smoking articles with significantly reduced gas vapor phase smoking constituents

Also Published As

Publication number Publication date
NO914064L (no) 1992-04-21
FI914887A (fi) 1992-04-18
DE69100939T2 (de) 1994-07-07
ES2047986T3 (es) 1994-03-01
DE69100939D1 (de) 1994-02-17
NO914064D0 (no) 1991-10-16
GB9022530D0 (en) 1990-11-28
FI914887A0 (fi) 1991-10-16
DK0481596T3 (da) 1994-05-16
ATE99504T1 (de) 1994-01-15
NO177033B (no) 1995-04-03
TR25451A (tr) 1993-05-01
NO177033C (no) 1995-07-12
EP0481596A1 (en) 1992-04-22

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