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Publication numberUSRE32221 E
Publication typeGrant
Application numberUS 06/656,993
Publication date12 Aug 1986
Filing date2 Oct 1984
Priority date2 Oct 1981
Fee statusLapsed
Publication number06656993, 656993, US RE32221 E, US RE32221E, US-E-RE32221, USRE32221 E, USRE32221E
InventorsJohn M. Adams
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Variable dilution filter
US RE32221 E
Abstract
Smoking article (10) has a filter mouthpiece (14) with a first stage filter element (18) and second stage filter element (19). First stage filter element (18) is rigidly attached to tipping paper (22). Second stage filter element (19) is free to move longitudinally in mouthpiece (14) and may be made to move axially by tapping the cigarette, thus, covering some of the ventilation holes (16) and changing the smoke to air ratio and the flavor.
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Claims(9)
I claim:
1. In a smoking article the improvements which comprise:
a filter mouthpiece attached to one end of said smoking article by air impervious tipping paper.[.;.]. .Iadd.having .Iaddend.
a second stage filter means mounted in said mouthpiece behind the tobacco portion of said smoking article and free to move in an axial direction in said mouthpiece in response to tapping said mouthpiece on a hard surface;
a first stage filter means rigidly mounted in said mouthpiece behind said second stage filter means such that there is space for axial movement of said second stage filter; and
ventilation holes in said air impervious tipping paper forward of said first stage filter and behind the tobacco portion of said smoking article.
2. A smoking article as in claim 1 wherein a third stage filter means is rigidly mounted in said mouthpiece forward of said second stage filter means and behind the tobacco portion of said smoking article.
3. A smoking article as in claim 1 wherein said ventilation holes are located immediately behind the tobacco portion of said smoking article.
4. A smoking article as in claim 1 or 2 wherein said filter means are enclosed in a porous plug wrap.
5. A smoking article as in claim 1 or 2 wherein said filter means are non-wrapped acetate filters.
6. A filter mouthpiece comprising:
an air impervious outer shell;
a third stage filter means rigidly mounted near one end of said outer shell;
a first stage filter means rigidly mounted near the opposite end of said outer shell;
a second stage filter means mounted in said mouthpiece between said first and third stage filter means and free to move axially in said mouthpiece in response to tapping said mouthpiece on a hard surface; and
ventilation holes in said air impervious outer shell between said first stage and third stage filter means.
7. A smoking article as in claim 1 or 2 .[.or 6.]. wherein said ventilation holes are located immediately forward of said first stage filter means.
8. A smoking article as in claim 2 .[.or 6.]. wherein said ventilation holes are located immediately behind said third stage filter means. .Iadd.
9. A filter mouthpiece as in claim 6 wherein said ventilation holes are located immediately forward of said first stage filter means. .Iaddend. .Iadd.10. A filter mouthpiece as in claim 6 wherein said ventilation holes are located immediately behind said third stage filter means. .Iaddend. .Iadd.11. A filter mouthpiece as in claim 6 wherein said filter means are enclosed in a porous plug wrap. .Iaddend. .Iadd.12. A filter mouthpiece as in claim 6 wherein said filter means are non-wrapped acetate filters. .Iaddend. .Iadd.13. A filter mouthpiece for a smoking article, said mouthpiece having a forward end to be disposed to receive smoke drawn into the mouthpiece, and a rearward end to be received in the mouth, consisting essentially of:
tipping paper formed into a cylinder and adapted to be attached to a smoking cylinder at its forward end and to define the exterior wall of said mouthpiece;
a first cylindrical filter element that is disposed in the cylinder formed by said tipping paper at the rearward end of said mouthpiece and that is rigidly secured to the inner surface of the tipping paper,
a second cylindrical filter element that is disposed in the cylinder formed by said tipping paper at its forward end, in spaced relation to at least one of said forward end of the mouthpiece and said first filter element, to define a cylindrical chamber within said mouthpiece that is bounded by and extends to the inner surface of said tipping paper,
said second filter element is free to move in an axial direction within said cylindrical tipping paper, in response to tapping said mouthpiece on a hard surface, and
said tipping paper having at least one aperture that can communicate with said chamber to admit air to said chamber. .Iaddend. .Iadd.14. The filter mouthpiece of claim 13 wherein both of said filter elements are enclosed respectively in a cylindrical porous plug wrap, wherein the plug wrap about said first filter element is rigidly secured to the inner surface of said tipping paper. .Iaddend. .Iadd.15. The mouthpiece of claim 13 wherein said second filter element is spaced from said first filter element, to define said chamber between said two filter elements. .Iaddend. .Iadd.16. The filter mouthpiece of claim 13 wherein said second filter element is free to move in an axial direction within said cylindrical tipping paper, in response to tapping the rearward end of said mouthpiece on a hard surface, and wherein after causing such movement to occur, said second filter element has been moved toward said first filter element and is spaced from a said smoking cylinder and from the forward end of said mouthpiece. .Iaddend. .Iadd.17. The filter mouthpiece of claim 16 wherein said second filter element is free to move in an axial direction within said cylindrical tipping paper, in response to tapping the forward end of either of said mouthpiece or of an attached smoking cylinder, on a hard surface. .Iaddend. .Iadd.18. The filter mouthpiece of claim 13 comprising a third cylindrical filter element that is rigidly secured in place inside said cylindrical tipping paper, at the forward end of said mouthpiece, for abutment against the smoking material in an attached smoking cylinder. .Iaddend. .Iadd.19. A filter cigarette comprising a smoking cylinder and, attached to one end of said smoking cylinder, a filter mouthpiece according to claim 13. .Iaddend.
Description
BACKGROUND OF THE INVENTION

This invention relates to smoking articles in general and more particularly to a ventilated cigarette with means to adjust the smoke to ventilation air ratio.

DESCRIPTION OF THE PRIOR ART

The current trend in cigarette manufacturing has been to reduce the concentration of certain components of smoke. For example, filters made of fibrous materials such as cellulose acetate are used to lower the concentration of particulate matter in the smoke generated in smoking. Ventilation into the filter has been used to further reduce the concentration of particulate matter and also to lower the concentration of gas phase components.

Filtration of the smoke and ventilation into the cigarette filter both affect the flavor of the cigarette. In particular, as ventilation is increased and smoke to ventilation air ratio is reduced, the flavor of the cigarette is reduced. Since the ventilation ratio on most cigarettes is fixed at the factory, a smoker not satisfied with the flavor of a particular cigarette would have no choice but to change brands, when all he was dissatisfied with was the highly diluted flavor of smoke he was receiving.

Prior art methods of componsating for this problem have met with varying degrees of success. Regal et al, U.S. Pat. No. 3,503,406 and Thompson, U.S. Pat. No. 3,359,988 use sliding external mechanical sleeves which must be positioned so that openings in the slidable sleeve are aligned with openings in the filter mouthpiece. These methods add to the manufacturing cost in that an additional piece must be added to each cigarette filter.

Other devices such as those disclosed by Cavelli, U.S. Pat. No. 3,858,587 and Sipos, U.S. Pat. No. 3,486,508 employ devices that must be operated with the smokers teeth as in Cavelli or with the smokers tongue as in Sipos. These methods are not aesthetically pleasing and suffer from a lack of uniformity when mass produced at the rate modern cigarettes are manufactured.

It is, therefore, an object of the present invention to provide a cigarette wherein the smoke to ventilation air ratio may be changed to suit the preference of the smoker.

It is also an object of the present invention to provide a cigarette with variable smoke to ventilation air ratio which is compatible with current high speed cigarette manufacturing equipment.

Yet another object of the present invention is to produce a cigarette with a variable smoke to ventilation air ratio that is aesthetically pleasing to the smoker.

SUMMARY OF THE INVENTION

According to the present invention, the foregoing and other objects are attained by providing a smoking articles with a first stage filter which is rigidly attached to the tipping paper at the mouth end of the mouthpiece. A second stage filter element located forward of the first stage element is free to slide axially and may be made to move rearward by tapping the mouthpiece end of the smoking article on a hard surface. Rearward movement of the second stage filter element covers some of the ventilation holes located in the tipping paper between the first stage and second stage filter element which increases the smoke to ventilation ratio thus increasing the flavor of the cigarette.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention and many of the attendent advantages thereof will be readily apparent by reference to the follow detailed description when considered in connection with the accompanying drawings wherein:

FIG. 1 is a perspective view, partially broken away, of a smoking article according to the present invention;

FIG. 2 is a longitudinal cross-section of the invention shown in FIG. 1;

FIG. 3 is a longitudinal cross-section of the invention shown in FIG. 1 wherein the second stage element has moved partially to the rear;

FIG. 4 is a longitudinal cross-section of another embodiment of the invention; and

FIG. 5 is a longitudinal cross-section of a smoking article according to the present invention with a third stage filter element.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now more particularly to the drawings and specifically to FIG. 1 there is illustrated a preferred embodiment of the invention as it would be used in a smoking article, in this case a cigarette designated generally by the numeral 10. Cigarette 10 has two major parts, smoking cylinder 12 and filter mouthpiece 14.

Filter mouthpiece 14, which is approximately cylindrical in shape, substantially conforms to the cross-sectional size and shape of smoking cylinder 12. Filter mouthpiece 14 consists of a first stage filter element 18 and a second stage filter element 19 enclosed by tipping paper 22. First stage filter element 18 may be of any filtering material, but in the preferred embodiment is cellulose acetate. Plug wrap 20 encloses first stage filter element 18 and is rigidly attached to tipping paper 22. Second stage filter element 19 is similar in construction to the first stage filter element 18, but is not attached to tipping paper 22 and is thus free to move in an axial direction. Filter elements 18 and 19 may be used without plug wrap 20. For example, a nonwrapped acetate filter element, in which the outer surface has been bonded together with heat may be used.

Tipping paper 22 is air impervious and attaches filter mouthpiece 14 to smoking cylinder 12. Ventilation holes 16 in air impervious tipping paper 22 admit outside air to filter mouthpiece 14 in the space between first stage filter element 18 and second stage filter element 19.

As smoking article 10 is consumed, smoke from the burning coal of the cigarette travels through smoking cylinder 12. Air also enters smoking article 10 through ventilation holes 16 and mixes with the smoke in filter mouthpiece 14. In modern, highly diluted, highly filtered cigarettes the flavor of the resulting smoking article may be such that some smokers are not satisfied. In this event, the mouthpiece 14 of smoking article 10 may be tapped on a hard surface. This causes second stage filter element 19 to slide toward first stage filter element 18, as shown in FIG. 3, occluding some of ventilation holes 16. Since ventilation air must now be drawn through ventilation holes 16, porous plug wrap 20, and second stage filter element 19, less ventilation air enters filter mouthpiece 14. Thus, the resulting smoke to ventilation air ratio will be higher than in the cigarette before movement of second stage filter element 19 to the rear, resulting in a more highly flavored cigarette.

FIG. 4 shows another embodiment of the invention in which filter elements 18 and second stage filter element 19 have not been enclosed by a plug wrap. Also in this embodiment, ventilation holes 16 are located at the forward end of filter mouthpiece 14. Thus, ventilation air must travel through second stage filter element 19 resulting in a stronger flavored cigarette. In this embodiment, tapping filter mouthpiece 14 against a hard surface moves second stage filter element 19 towards first stage filter element 18 uncovering ventilation holes 16, thus, decreasing the smoke to ventilation air ratio. Therefore, this embodiment produces a weaker flavored cigarette when the filter mouthpiece 14 is tapped against a hard surface. This embodiment might be useful for changing the ventilation ratio after the cigarette has been partially smoked when the flavor normally becomes stronger as the length of the smoking cylinder 12 decreases.

FIG. 5 shows another embodiment of the invention with a third stage filter element 21. All three filter elements in this embodiment are shown with a non-wrapped acetate filter although here also a wrapped or non-wrapped filter element could be used. First stage filter element and third stage filter element are rigidly attached to tipping paper 22. Second stage filter element 19 is free to move axially in filter mouthpiece 14. This embodiment prevents shifting of the tobacco when filter mouthpiece 14 is tapped since third stage element 21 is rigidly attached directly behind smoking cylinder 12.

The embodiment shown in FIG. 5 may also be used as a detachable cigarette holder. In this case, tipping paper 22 would be more rigid than the earlier embodiments, plastic would be a suitable material, and would not be attached to smoking cylinder 12. When used as a cigarette holder the smoking cylinder would be inserted into mouthpiece 14. Smoke to ventilation air ratio would be adjusted as described below.

It is thus seen that in a cigarette according to the present invention, the smoke to ventilation air ratio may be varied by the smoker simply and effectively. It is also seen that a cigarette according to the present invention is of simple construction and compatible with modern high speed cigarette making machines.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2819720 *1 Jul 195514 Jan 1958Henry BurbigCigarette or cigar with filter
US2994251 *24 Jul 19581 Aug 1961Hauni Werke Koerber & Co KgMethod for producing filter rods
US3359988 *21 Apr 196526 Dec 1967Thomson Osborne MFilter cigarette
US3402724 *21 Oct 196524 Sep 1968Leonard L. ThomasApparatus for withdrawal from tobacco habit
US3410274 *24 Feb 196512 Nov 1968Imp Tobacco Co LtdCigarettes
US3441028 *27 Mar 196729 Apr 1969Wall Byron TApparatus for and method of removing condensible compounds from tobacco smoke
US3441029 *17 Jun 196629 Apr 1969Byron T WallDevice for removing tars from tobacco smoke and thermostatically controlling the blending of air therewith
US3482579 *7 Jun 19689 Dec 1969Imp Tobacco Co LtdFilter cigarette having a permeable band wrap
US3486508 *8 Feb 196730 Dec 1969Sipos WalterCigarette filter assembly
US3503406 *28 Oct 196831 Mar 1970Riegel Lawrence MurryCigarettes
US3590825 *29 Nov 19676 Jul 1971Imp Tobacco Group LtdFilter cigarette having apertured band
US3605756 *9 Oct 196720 Sep 1971Stewart Herman V DAdjustable filter cigarette
US3695274 *30 Nov 19703 Oct 1972Brown & Williamson TobaccoPiston type cigarette filter
US3707975 *22 Mar 19712 Jan 1973Imp Tobacco Group LtdFilter cigarette having apertured band
US3759268 *5 Aug 197018 Sep 1973Plourde JSelective air dosing means for cigarettes
US3789855 *22 Jun 19715 Feb 1974Liggett & Myers IncHigh flavor impact, low smoke yield cigarette mouthpiece
US3800805 *3 Oct 19722 Apr 1974Brown & Williamson TobaccoSmoking articles
US3847161 *20 Apr 197312 Nov 1974Morgenstern DFiltered cigarettes
US3858587 *5 Feb 19747 Jan 1975Cavelli Anthony RMagna-tip
US4273141 *14 Mar 197816 Jun 1981Jan Van TilburgSmoke filters
BE891728A1 * Title not available
DE2130862A1 *22 Jun 197128 Dec 1972Fritz KellerZigarettenspitze oder dergleichen Inhalationsmundstueck
EP1011731A1 *18 May 199828 Jun 2000Duke UniversityLipid a 4' kinase
FR2273443A5 * Title not available
GB1214319A * Title not available
GB1330936A * Title not available
GB1400278A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7669604 *30 Sep 20032 Mar 2010R.J. Reynolds Tobacco CompanyFiltered cigarette incorporating an adsorbent material
WO2013068398A1 *7 Nov 201216 May 2013Philip Morris Products S.ASmoking article with movable vapour release component
Classifications
U.S. Classification131/336, 131/198.1
International ClassificationA24D3/04
Cooperative ClassificationA24D3/041
European ClassificationA24D3/04A
Legal Events
DateCodeEventDescription
25 Feb 1996LAPSLapse for failure to pay maintenance fees
3 Oct 1995REMIMaintenance fee reminder mailed
8 Jul 1991FPAYFee payment
Year of fee payment: 8
20 Jul 1987FPAYFee payment
Year of fee payment: 4