CA2049573A1 - Uniform tar delivery profile filter - Google Patents

Uniform tar delivery profile filter

Info

Publication number
CA2049573A1
CA2049573A1 CA2049573A CA2049573A CA2049573A1 CA 2049573 A1 CA2049573 A1 CA 2049573A1 CA 2049573 A CA2049573 A CA 2049573A CA 2049573 A CA2049573 A CA 2049573A CA 2049573 A1 CA2049573 A1 CA 2049573A1
Authority
CA
Canada
Prior art keywords
flow path
delivery profile
cylinder
tar delivery
cigarette
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
CA2049573A
Other languages
French (fr)
Other versions
CA2049573C (en
Inventor
Warren Arthur Brackmann
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.)
Rothmans Benson and Hedges Inc
Original Assignee
Individual
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
Priority claimed from GB898904752A external-priority patent/GB8904752D0/en
Priority claimed from GB898909660A external-priority patent/GB8909660D0/en
Application filed by Individual filed Critical Individual
Publication of CA2049573A1 publication Critical patent/CA2049573A1/en
Application granted granted Critical
Publication of CA2049573C publication Critical patent/CA2049573C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Fats And Perfumes (AREA)

Abstract

A tobacco smoke filter element produces a more uniform tar delivery profile without an unacceptable pressure drop by causing the cigarette smoke to assume a progressively longer flow path through an outer cylinder of higher flow resistance filter tow material before passing radially inwardly through a cylinder of microfine fibres into a low resistance flow path to the smoker's mouth. The progressively increased flow path results from progressive clogging of the cylinder of microfine fibres by filtered material as smoking of the cigarette progresses.
CA002049573A 1989-03-02 1990-03-01 Uniform tar delivery profile filter Expired - Fee Related CA2049573C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8904752.6 1989-03-02
GB898904752A GB8904752D0 (en) 1989-03-02 1989-03-02 Uniform tar delivery profile filter
GB898909660A GB8909660D0 (en) 1989-04-27 1989-04-27 Uniform tar delivery profile filter-11
GB8909660.6 1989-04-27

Publications (2)

Publication Number Publication Date
CA2049573A1 true CA2049573A1 (en) 1991-09-02
CA2049573C CA2049573C (en) 1997-01-14

Family

ID=26295035

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002049573A Expired - Fee Related CA2049573C (en) 1989-03-02 1990-03-01 Uniform tar delivery profile filter

Country Status (6)

Country Link
EP (1) EP0461162B1 (en)
JP (1) JP2701974B2 (en)
AU (1) AU629320B2 (en)
CA (1) CA2049573C (en)
DE (1) DE69031032T2 (en)
WO (1) WO1990009741A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8823902D0 (en) * 1988-10-12 1988-11-16 Rothmans Int Tobacco Cigarette filter rod elements & cigarettes incorporating such filter rod elements
US5746230A (en) * 1990-08-24 1998-05-05 Philip Morris Incorporated Concentric smoking filter having discrete tow and web filter media
US5365951A (en) * 1990-08-24 1994-11-22 Philip Morris Incorporated Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
GB9117118D0 (en) * 1991-08-08 1991-09-25 Rothmans Benson & Hedges Control of cigarette smoke chemistry
AU699329B2 (en) * 1991-08-08 1998-12-03 Rothmans International Services Limited Control of cigarette smoke chemistry
GB9122935D0 (en) * 1991-10-30 1991-12-18 Rothmans Benson & Hedges Novel cigarette system
TR26626A (en) * 1992-12-18 1995-03-15 Rothmans Benson And Hedges Inc NEW VERY SOFT SMOKING SYSTEM.
TR28750A (en) * 1992-12-18 1997-02-28 Rothmans Benson & Hedges A new cigarette structure that allows individual cigarettes to be partially smoked, extinguished and then reintroduced.
GB9307710D0 (en) * 1993-04-14 1993-06-02 Rothmans Benson & Hedges Smoking apparatus-l
DE4322967C1 (en) * 1993-07-09 1994-10-13 Rhodia Ag Rhone Poulenc Cellulose acetate filter tow, production thereof and use thereof as tobacco smoke filter element
US7987856B2 (en) * 2005-12-29 2011-08-02 Philip Morris Usa Inc. Smoking article with bypass channel
GB0713905D0 (en) 2007-07-17 2007-08-29 British American Tobacco Co Cellulose acetate thread in filter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1097748A (en) * 1965-05-27 1968-01-03 Monsanto Co Cigarette filter
US3502087A (en) * 1968-07-05 1970-03-24 Ernest J Romano Cigarette filter
US3621851A (en) * 1969-11-26 1971-11-23 Kata Mfg & Filtering Co Filter for smoker's article
US3854384A (en) * 1971-05-24 1974-12-17 Brown & Williamson Tobacco Corp Method of making tobacco smoke filters
GB1360611A (en) * 1971-06-30 1974-07-17 Molins Ltd Cigarette filters
DE3624661A1 (en) * 1986-07-22 1988-02-04 Rhodia Ag VENTILATED CIGARETTE
GB8823902D0 (en) * 1988-10-12 1988-11-16 Rothmans Int Tobacco Cigarette filter rod elements & cigarettes incorporating such filter rod elements
DK499289A (en) * 1988-10-12 1990-04-13 Rothmans Int Tobacco CANDLE ELEMENTS FOR CIGARET FILTERS AND CIGARETTE EQUIPPED WITH SUCH CUSTOM ELEMENTS

Also Published As

Publication number Publication date
CA2049573C (en) 1997-01-14
AU629320B2 (en) 1992-10-01
AU5268990A (en) 1990-09-26
JP2701974B2 (en) 1998-01-21
WO1990009741A1 (en) 1990-09-07
JPH04503753A (en) 1992-07-09
EP0461162B1 (en) 1997-07-09
EP0461162A1 (en) 1991-12-18
DE69031032D1 (en) 1997-08-14
DE69031032T2 (en) 1998-01-29

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed