GB1323947A - Tobacco-smoke filters - Google Patents

Tobacco-smoke filters

Info

Publication number
GB1323947A
GB1323947A GB1657271A GB1323947DA GB1323947A GB 1323947 A GB1323947 A GB 1323947A GB 1657271 A GB1657271 A GB 1657271A GB 1323947D A GB1323947D A GB 1323947DA GB 1323947 A GB1323947 A GB 1323947A
Authority
GB
United Kingdom
Prior art keywords
filter
space
tube
tobacco
smoke
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.)
Expired
Application number
GB1657271A
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
Original Assignee
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 Co Ltd filed Critical British American Tobacco Co Ltd
Publication of GB1323947A publication Critical patent/GB1323947A/en
Expired 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
    • A24D3/045—Tobacco smoke filters characterised by their shape or structure with smoke acceleration means, e.g. impact-filters

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Abstract

1323947 Tobacco-smoke filter BRITISHAMERICAN TOBACCO CO Ltd 12 April 1972 [24 May 1971] 16472/71 Heading A2C The filter comprises a porous filter tube 1 extending eccentrically and substantially longitudinally within an outer tubular wrapper 2, spaces 8, 7 within the tube I and between it and the wrapper 2 being closed at opposite ends so that smoke entering the filter at one end is constrained to flow radially through the tube 1 from space 8 to space 7 before leaving the filter. The space 7 is closed at one end by a disc 3 having an opening 6 communicating with the space 8, and the space 8 is closed at one end by a disc 4 provided with longitudinal grooves 9 in its periphery communicating with the space 7. The tube 1 may be formed of filter paper, the wrapper 2 of cigarette paper or plastics material, and the discs 3, 4 of compressed paper, paper board, or smoke-impervious plastics material. A method of making the filter using conventional apparatus components is also disclosed.
GB1657271A 1971-05-24 1971-05-24 Tobacco-smoke filters Expired GB1323947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1657271 1971-05-24

Publications (1)

Publication Number Publication Date
GB1323947A true GB1323947A (en) 1973-07-18

Family

ID=10079734

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1657271A Expired GB1323947A (en) 1971-05-24 1971-05-24 Tobacco-smoke filters

Country Status (10)

Country Link
AU (1) AU456329B2 (en)
BE (1) BE783179A (en)
CA (1) CA951611A (en)
CH (1) CH546545A (en)
DE (1) DE2222289C3 (en)
DK (1) DK128804B (en)
FI (1) FI51895C (en)
GB (1) GB1323947A (en)
NL (1) NL171013C (en)
ZA (1) ZA722558B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342322A (en) * 1980-12-22 1982-08-03 Brown & Williamson Tobacco Corporation Cigarette filter

Also Published As

Publication number Publication date
ZA722558B (en) 1973-01-31
AU4141672A (en) 1973-10-25
NL7206903A (en) 1972-11-28
DE2222289B2 (en) 1978-02-23
CH546545A (en) 1974-03-15
AU456329B2 (en) 1974-12-12
DE2222289C3 (en) 1978-10-26
DE2222289A1 (en) 1972-12-07
FI51895C (en) 1977-05-10
FI51895B (en) 1977-01-31
NL171013B (en) 1982-09-01
DK128804B (en) 1974-07-08
NL171013C (en) 1983-02-01
BE783179A (en) 1972-09-01
CA951611A (en) 1974-07-23

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee