US3695274A - Piston type cigarette filter - Google Patents

Piston type cigarette filter Download PDF

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Publication number
US3695274A
US3695274A US93560A US3695274DA US3695274A US 3695274 A US3695274 A US 3695274A US 93560 A US93560 A US 93560A US 3695274D A US3695274D A US 3695274DA US 3695274 A US3695274 A US 3695274A
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US
United States
Prior art keywords
piston
opening
ports
face
shall
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 - Lifetime
Application number
US93560A
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English (en)
Inventor
Thomas W Summers
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.)
Brown and Williamson Holdings Inc
Original Assignee
Brown and Williamson Tobacco Corp
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 Brown and Williamson Tobacco Corp filed Critical Brown and Williamson Tobacco Corp
Application granted granted Critical
Publication of US3695274A publication Critical patent/US3695274A/en
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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/041—Tobacco smoke filters characterised by their shape or structure with adjustable means for modifying the degree of filtration of the filter

Definitions

  • the piston face has a plurality of perforations which [52] US. Cl ..131/10 A, 131/ l0.3,1:l;3; ⁇ 19g.i act as a filter. AS the perforations become blocked i and as the density of puffs increases during the smokg "A24d 01/04 13/04 ing of the cigarette, the vacuum created in drawing on 1 o are "131/ 6 35 the cigarette gradually draws the piston toward the smoker.
  • openings in the cylindrical wall of the piston become [56] References and aligned with openings in the outer tube so that air is UNITED STATES PATENTS drawn from the atmosphere directly into the smokers mouth through these openings rather than through the 3,512,537 5/1970 Pelletier ..l3l/ 198 A X tobacco column 2,764,513 9/1956 Brothers ..l31/l0.5 3,335,733 8/1967 Brooks ..l3 l/10.5 X 8 Claims, 3 Drawing Figures P'A'IEmEnuma m2 3.695.274
  • This invention relates to cigarettes or cigarette holders and, more particularly, to an improved filtering element within the mouthpiece of the cigarette or holder which automatically moves toward the smoker as the pressure drop of the filter increases and causes openings in the element and mouthpiece outer band to register, allowing a portion of the inhaled air to be drawn directly from the atmosphere.
  • the ventilation reduces tar and nicotine excessively during the early puffs.
  • Another object of this invention is to provide a piston type filter which is so constructed that it has the appearance and qualities of a conventional filter forming a part of a cigarette or holder and still functions in the manner herein described.
  • Another object of this invention is to provide a filter which is efficient for its intended purpose and simple and economical to manufacture.
  • the present invention covers a mouthpiece for a cigarette or cigarette holder in which a cup-like piston is slidable within a tube forming the outer wrap of the mouthpiece.
  • the face of the piston is provided with a plurality of holes or perforations which serve as afilter.
  • the cylindrical wall of the piston is provided with a number of ports or openings which are covered by'the outer wrap prior to smoking of the cigarette.
  • the ports in the piston overlap the perforations in the outer wrap allowing a portion of the inhaled air to be drawn from the atmosphere and mix with the air drawn through the tobacco column.
  • the ports in the piston and the perforations in the outer wrap may be of any shape, it has been found preferable to have the ports in the piston so shaped that the size of the overlap of the ports and the flow of air from the atmosphere will increase as the piston moves toward the smoker.
  • FIG. 1 is a view of a cigarette showing the piston type mouthpiece of this invention
  • FIG. 2 is a cross-sectional view along the line 2-2 of FIG. 1;
  • FIG. 3 is a cross-sectional view along the line 3-3 of FIG. 2.
  • FIG. 1 of the drawings there is shown a cigarette 10 encased in an outer wrap 12 with a mouthpiece 11 of this invention. Slidable within the outer wrap 12 is a cup-like piston 13 (FIG. 2) provided with holes or perforations 14 which act as a filter for air being drawn through thetobacco 15.
  • the piston may be made of various materials, but nylon and polyethylene arethe most preferred. It has been found preferable to use between seven and I1 holes, each having an area of 0.46 square millimeters, although such area may be varied between 0.1 and 0.7 square millimeters. The total area of these holes would be within the approximate range of l to 5 square millimeters.
  • the piston has'ports 16 in the side covered by the outer wrap. Although the number of such ports 16 may vary in number and size, it has been found that three or four ranging from I to 16 square millimeters will not weaken or destroy the strength of the piston.
  • the size of the ports is defined by the degree of perforations in the outer wrap.
  • P is the tobacco section pressure drop
  • P is the pressure drop of the hole in the face of the piston
  • P is the pressure drop of the overlap.
  • Each port 16 in the piston is shown in the shape of a triangle with the registering perforations 17 in the outer wrap in the shape of rectangles. Since the main object is to have the overlapping ports and perforations form an air opening which will become larger as the piston moves toward the smoker, it will be apparent that such ports can be varied in shape and combinations of shapes to achieve that result.
  • the overlapping ports could be rectangles, circles, triangles or similar figures.
  • the operation of the filter device should be clear from the foregoing description.
  • the invention provides a device which can be connected to a cigarette either as a cigarette holder or as a unitary filter cigarette. It will be understood that this filter device can also be used with a conventional cellulose acetate filter at either end or inside the piston. It does not detract from the holder or cigarette, is simple and economical to manufacture, and operates effectively.
  • a filter device adapted to be interposed between the tobacco end and the mouthpiece end of a smoking device comprising:
  • a sleeve forming the outer wrap of the device and having at least one opening in its side wall
  • a tubular piston slidable in said sleeve and having at least one port in its side wall, the said port being interposed between the said opening and the tobacco end of the device and the the tubular side wall of said piston covering the said opening when the piston is in its initial position,
  • said piston being adapted to move axially toward the mouthpiece end in response to a pressure differential across the said face as the smoker draws on the device, whereby the piston will move until sufiicient air enters the air passage formed by the overlapping port and opening and there is no pressure difierential across the face.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
US93560A 1970-11-30 1970-11-30 Piston type cigarette filter Expired - Lifetime US3695274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9356070A 1970-11-30 1970-11-30

Publications (1)

Publication Number Publication Date
US3695274A true US3695274A (en) 1972-10-03

Family

ID=22239610

Family Applications (1)

Application Number Title Priority Date Filing Date
US93560A Expired - Lifetime US3695274A (en) 1970-11-30 1970-11-30 Piston type cigarette filter

Country Status (9)

Country Link
US (1) US3695274A (enrdf_load_stackoverflow)
AU (1) AU450226B2 (enrdf_load_stackoverflow)
BE (1) BE776025A (enrdf_load_stackoverflow)
BR (1) BR7107540D0 (enrdf_load_stackoverflow)
CA (1) CA947604A (enrdf_load_stackoverflow)
CH (1) CH545601A (enrdf_load_stackoverflow)
GB (1) GB1330936A (enrdf_load_stackoverflow)
NL (1) NL154926B (enrdf_load_stackoverflow)
ZA (1) ZA717384B (enrdf_load_stackoverflow)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000478A1 (en) * 1982-07-23 1984-02-16 Philip Morris Inc Cigarettes and methods of manufacture
US4433696A (en) 1981-10-02 1984-02-28 Philip Morris Incorporated Variable dilution filter
US4526183A (en) * 1982-09-30 1985-07-02 Philip Morris Incorporated Filter cigarette
US4527573A (en) * 1982-11-05 1985-07-09 Philip Morris Incorporated Filter cigarette
US4532943A (en) * 1982-09-30 1985-08-06 Philip Morris Incorporated Adjustable filter cigarette
US4559955A (en) * 1983-06-20 1985-12-24 Link Electronics Ltd Controlled air bleed cigarette holder
EP0165704A1 (en) * 1984-05-22 1985-12-27 Imperial Tobacco Limited Improvements in or relating to tobacco smoke filters
US4570649A (en) * 1982-09-30 1986-02-18 Philip Morris Incorporated Filter cigarette
USRE32221E (en) * 1981-10-02 1986-08-12 Variable dilution filter
FR2581843A1 (fr) * 1985-05-20 1986-11-21 Tobacco Res & Dev Cigarette a entree d'air
US4638820A (en) * 1986-02-03 1987-01-27 R. J. Reynolds Tobacco Company Puff control cigarette
US4649944A (en) * 1982-09-30 1987-03-17 Philip Morris Incorporated Filter cigarette
US4649941A (en) * 1985-12-16 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
US4649945A (en) * 1985-12-05 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
BE1000454A4 (nl) * 1987-04-09 1988-12-13 Tabacofina Nv Mondstuk voor sigaretten en dergelijke.
US4898190A (en) * 1989-03-01 1990-02-06 R. J. Reynolds Tabacco Company Adjustable air dilution cigarette with pressure drop compensation
US4949736A (en) * 1988-03-16 1990-08-21 R. J. Reynolds Tobacco Company Variable ventilation mouthpiece for a smoking article
US6318376B1 (en) * 1999-12-07 2001-11-20 Chih-Wen Cheng Filter tip structure for cigarette

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102247B1 (en) * 1982-09-01 1987-10-28 Imperial Tobacco Limited Tipping assembly for an elongate smoking article
GB2158689B (en) * 1984-05-19 1987-11-18 British American Tobacco Co Improvements relating to smoking articles
GB9023368D0 (en) * 1990-10-26 1990-12-05 Rothmans International Ltd Smoking article
CN1109304A (zh) * 1994-11-09 1995-10-04 宁宝纲 一种卷烟复合滤嘴
RU2125822C1 (ru) * 1998-06-15 1999-02-10 Погосян Сейран Амаякович Курительное изделие
RU2138974C1 (ru) 1999-03-12 1999-10-10 Погосян Сейран Амаякович Курительное изделие
GB201310599D0 (en) 2013-06-13 2013-07-31 Filtrona Filter Prod Dev Co Tabacco smoke filter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2145733A (en) * 1938-02-01 1939-01-31 Palumbo Peter Filter and ejector for cigarette and cigar holders
US2764513A (en) * 1954-04-02 1956-09-25 Abe R Brothers Cigarette with means for removing deleterious products of combustion
US3335733A (en) * 1965-03-15 1967-08-15 John M Brooks Smoke filter
US3512537A (en) * 1968-11-27 1970-05-19 U S Remedy Corp Adjustable aerated cigarette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2145733A (en) * 1938-02-01 1939-01-31 Palumbo Peter Filter and ejector for cigarette and cigar holders
US2764513A (en) * 1954-04-02 1956-09-25 Abe R Brothers Cigarette with means for removing deleterious products of combustion
US3335733A (en) * 1965-03-15 1967-08-15 John M Brooks Smoke filter
US3512537A (en) * 1968-11-27 1970-05-19 U S Remedy Corp Adjustable aerated cigarette

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4433696A (en) 1981-10-02 1984-02-28 Philip Morris Incorporated Variable dilution filter
USRE32221E (en) * 1981-10-02 1986-08-12 Variable dilution filter
EP0100215A3 (en) * 1982-07-23 1985-10-09 Philip Morris Incorporated Cigarettes and methods of manufacture
WO1984000478A1 (en) * 1982-07-23 1984-02-16 Philip Morris Inc Cigarettes and methods of manufacture
EP0247702A3 (en) * 1982-07-23 1988-12-21 Philip Morris Products Inc. Cigarettes
US4649944A (en) * 1982-09-30 1987-03-17 Philip Morris Incorporated Filter cigarette
US4526183A (en) * 1982-09-30 1985-07-02 Philip Morris Incorporated Filter cigarette
US4532943A (en) * 1982-09-30 1985-08-06 Philip Morris Incorporated Adjustable filter cigarette
US4570649A (en) * 1982-09-30 1986-02-18 Philip Morris Incorporated Filter cigarette
US4527573A (en) * 1982-11-05 1985-07-09 Philip Morris Incorporated Filter cigarette
US4559955A (en) * 1983-06-20 1985-12-24 Link Electronics Ltd Controlled air bleed cigarette holder
EP0165704A1 (en) * 1984-05-22 1985-12-27 Imperial Tobacco Limited Improvements in or relating to tobacco smoke filters
FR2581843A1 (fr) * 1985-05-20 1986-11-21 Tobacco Res & Dev Cigarette a entree d'air
US4649945A (en) * 1985-12-05 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
US4649941A (en) * 1985-12-16 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
EP0231640A1 (en) * 1986-02-03 1987-08-12 R.J. Reynolds Tobacco Company Puff control smoking article
US4638820A (en) * 1986-02-03 1987-01-27 R. J. Reynolds Tobacco Company Puff control cigarette
BE1000454A4 (nl) * 1987-04-09 1988-12-13 Tabacofina Nv Mondstuk voor sigaretten en dergelijke.
US4949736A (en) * 1988-03-16 1990-08-21 R. J. Reynolds Tobacco Company Variable ventilation mouthpiece for a smoking article
US4898190A (en) * 1989-03-01 1990-02-06 R. J. Reynolds Tabacco Company Adjustable air dilution cigarette with pressure drop compensation
US6318376B1 (en) * 1999-12-07 2001-11-20 Chih-Wen Cheng Filter tip structure for cigarette

Also Published As

Publication number Publication date
AU3593971A (en) 1973-05-24
GB1330936A (en) 1973-09-19
ZA717384B (en) 1972-07-26
DE2156043B2 (de) 1976-05-20
DE2156043A1 (de) 1972-05-31
CH545601A (enrdf_load_stackoverflow) 1974-02-15
BR7107540D0 (pt) 1973-02-22
BE776025A (fr) 1972-05-30
NL7115951A (enrdf_load_stackoverflow) 1972-06-01
NL154926B (nl) 1977-11-15
AU450226B2 (en) 1974-07-04
CA947604A (en) 1974-05-21

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