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Publication numberUS3797644 A
Publication typeGrant
Publication dateMar 19, 1974
Filing dateApr 21, 1972
Priority dateApr 21, 1972
Also published asDE2315749A1
Publication numberUS 3797644 A, US 3797644A, US-A-3797644, US3797644 A, US3797644A
InventorsShaw H
Original AssigneeAquafilter Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Filter
US 3797644 A
Abstract
A cigarette holder-filter includes a cigarette receiving socket at one end and a mouthpiece at the other end. The interior of the holder includes a fibrous filtering material impregnated with water. The ends of the holder are sealed in a manner both to prolong substantially the shelf life of the unit and to enable the holder to be filled fully with water. This is achieved by forming a minute air-escape hole in the otherwise sealed mouthpiece end of the filter to enable the interior of the filter to be filled fully and excessively with water before the cigarette-receiving end is sealed. The hole is small enough to minimize evaporation of the water.
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Description  (OCR text may contain errors)

' United States Patent [1 1 [451 Mar. 19, 1974 Primary Examiner-Leonard Summer Attorney, Agent, or Firm-Wolf, Greenfield & Sacks 5 7 ABSTRACT A cigarette holder-filter includes a cigarette receiving socket at one end and a mouthpiece at the other end. The interior of the holder includes a fibrous filtering material impregnated with water. The ends of the [52] U.S. Cl. 206/41 R, 53/37 51 rm. Cl B65d 79/00, B65b 3/04 Older are i a manner POkmg Subsm' [58] Field of Search 206/41 R' 53/37 tially the shelf life of the unit and to enable the holder to be filled fully with water. This is achieved by form- [56] )Reierences Cited ing a minute air-escape hole in the otherwise sealed NI mouthpiece end of the filter to enable the interior of U TED STATES PATENTS the filter to be filled fully and excessively with water 3375930 4/1968 w 306/4l R X before the cigarette-receiving end is sealed. The hole 1.728.473 9/l929 Brosius .4 206/41 R is Small enough to minimize evaporation of the water. 3.206.059 9/1965 Fead et al. 220/44 R 4 Claims, 3 Dravving Figures @T/ 1 I/'/' I I I I I 5 24 34 PATENTEDHAR 1 9 1974 3797x544 FILTER BACKGROUND OF THE INVENTION This invention relates to improvement in cigarette filtering devices and particularly to'those devices which are prepackaged with a water impregnated fibrous material. Among the difficulties which have been encountered with such devices is the tendency of the water to evaporate which results in a relatively short shelf life. Moreover, when substantial amounts of the water have evaporated, the filter looses its efficiency. While these difficulties may be overcome by employing a filter of the type described in my U.S. Pat. No. 3,375,920 by providing a special sealing arrangement to reduce materially the loss of water, the sealing of one end of the filter device may occasionally cause difficulty in filling of the device with water. Occasionally, thefilter may be filled with an insufficient amount of water. It is among the primary objects of the invention to provide an improved filter and technique for fabricating the filter which insures that the fibrous filter material will be impregnated fully yet which also provides substantially increased shelf life.

SUMMARY OF THE INVENTION The invention resides in providing a minute pin hole in the seal at the mouthpiece end of the device which enables air which might ordinarily become entrapped in the filter, to escape through the mouthpiece end when the filter is filled with water. Because there are no entrapped air pockets, the interior of the filter may be filled to saturate fully the fibrous plug and may even be filled beyond this amount. After the filter is filled with water the cigarette-receiving end is sealed. While the existence of the minute pin hole may permit a relatively small amount of water to evaporate and escape, the rate of any such escape is so insignificant in relation to the amount of water within the filter device as to still increase substantially the shelf life of the filtering device.

It is among the objects of the invention to provide an improved water impregnated cigarette filtering device which has a substantially extended shelf life.

A further object of the invention is to provide an improved cigarette filtering device and technique for manufacturing the device which provides a high degree of reliability in impregnation of the device with water while reducing the likelihood of entrapping air within the filter.

DESCRIPTION OF THE DRAWINGS The foregoing and other objects and advantages of the invention will be understood more fully from the following detailed description thereof, with reference to the accompanying drawings wherein:

FIG. 1 is an illustration of a cigarette filter of the type described;

FIG. 2 is an illustration of the filter in section as seen along the line 22 of FIG. 1; and

FIG. 3 is an end view of the sealed mouthpiece of the filter.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows, for example, one of a variety of disposable cigarette filters of the type with which the invention may be employed. Such filters are described generally in US. Pat. No. 3,137,303 and my aforementioned US. Pat. No. 3,375,920. These filters contain a fibrous material preimpregnated with water. Generally,the filter includes an elongated casing 10 formed from a plastic material. The casing has a tapered mouthpiece 12 formed at one end and an annular cigarettereceiving socket 14 at the other end. In the embodiment shown, a cylindrical metal sleeve 16 having an outwardly flared lip 18 is fitted firmly into the cigarette receiving end of the casing 10, with the lip 18 engaging a lip 20 formed on the casing. The sleeve 16 defines the cigarette receiving socket 14 and is proportioned to receive a cigarette in a snug fit. A fibrous material 21 is disposed within the casing rearwardly of the sleeve 16.

The completed filter is closed at its socket end with a cap 22 having a continuous sidewall 24 which is closed at the bottom by an integral and continuous dome-like bottom 26. The upper edge of the sidewall 24 is outwardly and arcuately flared to define a lip 28. This lip 28 is spaced from the lip 18 on the sleeve 16 to define a recess 30 of sufficient dimension to permit one to insert a fingernail between these two lips for removal of the cap 22. The cap is formed of a suitable substantially gas impervious plastic material having sufficient flexibility and resilience to permit insertion and removal of the cap with relative ease. For example, polyethylene may be an appropriate plastic material.

The mouthpiece end 12 of the device is covered with a removable covering 32 formed of a film of tearable plastic material. The covering 32 may be formed by dipping the mouthpiece end of the easing into a fluid plastic bath a sufficient distance to form the film over the mouthpiece end to enclose fully the mouthpiece. An appropriate material for the covering 32 should be non-toxic easily tearable or removable from the mouth piece end in ordinary use. For example, the covering may be formed from a commercially available material known as Thermi Cote N4 which is principally a mixture of cellulose acetate butyrate and dioctyl phthalate material.

In fabricating the filter, the fibrous material and sleeve 16 may be inserted into the casing 10. The mouthpiece end of the casing 10 then is dipped into the plastic film forming material to form the covering 32. After the covering film 32 has been formed but before the water is introduced into the filter, a minute pin hole 34 is formed through the covering 32 in communication with the internal passage 36 within the mouthpiece 12. After the pin hole 34 has been formed the casing may be filled to the desired extent with water. There is no tendency for air to become entrapped in the filter as the air may escape through the minute pin hole. As a result, it is insured that a sufficient quantity of water will be received in the device. After the device has been filled with water the cap 22 is inserted into the sleeve 16 to seal effectively the interior of the device. I have found that the single minute pin hole has no noticeable adverse effect on the shelf life of the filter. In shelf life tests which were conducted, there did not appear to be any adverse effect on the quantity of water retained within the filter. I have found that a pin hole approximately 0030-0040 inch diameter gives quite satisfactory results.

When one of the filters embodying the above construction is used the user unseals the ends and then blows through one end of the holder to discharge the excess water contained therein. The cigarette holder then is ready for use with the assurance that the filter material is properly wetted.

It should be understood that the foregoing description of the invention is intended merely to be illustrative thereof and that other embodiments and modifications may be apparent to those skilled in the art without departing from its spirit.

Having thus described the invention what I desire to claim and secure by letters Patent is:

l. A cigarette holder construction comprising:

a casing having a mouthpiece end and a socket end adapted to receive a cigarette tip;

a fluid impregnable fibrous mass disposed within said casing between said ends;

a volume of fluid disposed within said casing, said volume of fluid being greater than that which is required to impregnate fully said fluid impregnable fibrous mass;

a removable cap for said cigarette end receiving socket adapted to engage and seal said socket; and

a removable covering for said mouthpiece end comprising a film of tearable plastic material, said film having a minute hole formed therein in communication with the interior of said casing. 2. A cigarette holder as defined in claim I further comprising:

said pin hole being no greater than approximately 0.040 inches in diameter. 3. A method of fabricating a cigarette holder as defined in claim 1 comprising:

filling said casing with said fluid impregnable mass;

dipping the mouthpiece end of said casing into said plastic material to form said film defining said removable covering;

thereafter piercing said film to define a minute hole in communication with the interior of said casing;

hole is no greater than approximately 0.040 inches in diameter.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1728473 *Jun 4, 1927Sep 17, 1929 Edward e
US3206059 *Sep 13, 1962Sep 14, 1965Hudson Pulp & Paper CorpContainer lid
US3375920 *Jul 1, 1966Apr 2, 1968Herman L. ShawFilter material
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4003387 *Feb 26, 1976Jan 18, 1977Aquafilter CorporationCigarette filter holder
US4873999 *Nov 18, 1988Oct 17, 1989Steinert Rosa MCigarette holder
US7115085Sep 12, 2003Oct 3, 2006R.J. Reynolds Tobacco CompanyMethod and apparatus for incorporating objects into cigarette filters
US7479098Sep 23, 2005Jan 20, 2009R. J. Reynolds Tobacco CompanyEquipment for insertion of objects into smoking articles
US7654945Aug 4, 2006Feb 2, 2010R.J. Reynolds Tobacco CompanyMethod and apparatus for incorporating objects into cigarette filters
US7793665Aug 14, 2006Sep 14, 2010R.J. Reynolds Tobacco CompanyFiltered cigarette incorporating a breakable capsule
US7833146Dec 23, 2009Nov 16, 2010R.J. Reynolds Tobacco CompanyMethod and apparatus for incorporating objects into cigarette filters
US7836895Jun 23, 2003Nov 23, 2010R. J. Reynolds Tobacco CompanyFiltered cigarette incorporating a breakable capsule
US7972254Jun 11, 2007Jul 5, 2011R.J. Reynolds Tobacco CompanyApparatus for inserting objects into a filter component of a smoking article, and associated method
US7984719Oct 12, 2010Jul 26, 2011R. J. Reynolds Tobacco CompanyFiltered cigarette incorporating a breakable capsule
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US8186359Feb 1, 2008May 29, 2012R. J. Reynolds Tobacco CompanySystem for analyzing a filter element associated with a smoking article, and associated method
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US8308623Oct 28, 2008Nov 13, 2012R.J. Reynolds Tobacco CompanyApparatus for enhancing a filter component of a smoking article, and associated method
US8475348Sep 28, 2010Jul 2, 2013Aiger Group AgApparatus and method for assembly of multi-segment rod-like articles
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US8622882Sep 27, 2010Jan 7, 2014Aiger Group AgApparatus and method for insertion of capsules into filter tows
US8739802Oct 2, 2006Jun 3, 2014R.J. Reynolds Tobacco CompanyFiltered cigarette
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US9554594Oct 24, 2011Jan 31, 2017R.J. Reynolds Tobacco CompanyFiltered cigarette incorporating an adsorbent material
US20040261807 *Jun 23, 2003Dec 30, 2004Dube Michael FrancisFiltered cigarette incorporating a breakable capsule
US20050066982 *Sep 30, 2003Mar 31, 2005Clark Melissa AnnFiltered cigarette incorporating an adsorbent material
US20050070409 *Sep 12, 2003Mar 31, 2005Deal Philip AndrewMethod and apparatus for incorporating objects into cigarette filters
US20060272663 *Aug 14, 2006Dec 7, 2006Dube Michael FFiltered cigarette incorporating a breakable capsule
US20060293157 *Aug 4, 2006Dec 28, 2006R.J. Reynolds Tobacco CompanyMethod and apparatus for incorporating objects into cigarette filters
US20070068540 *Sep 23, 2005Mar 29, 2007Thomas Timothy FEquipment for insertion of objects into smoking articles
US20080302373 *Jun 11, 2007Dec 11, 2008R.J. Reynolds Tobacco CompanyApparatus for Inserting Objects into a Filter Component of a Smoking Article, and Associated Method
US20100099543 *Dec 23, 2009Apr 22, 2010R.J. Reynolds Tobacco CompanyMethod and Apparatus For Incorporating Objects Into Cigarette Filters
US20100101589 *Oct 28, 2008Apr 29, 2010John Larkin NelsonApparatus for enhancing a filter component of a smoking article, and associated method
US20110011412 *Jul 14, 2009Jan 20, 2011Aiger Engineering, Ltd.Apparatus and method for assembly of multi-segment rod-like articles
US20110023896 *Oct 12, 2010Feb 3, 2011R. J. Reynolds Tobacco CompanyFiltered cigarette incorporating a breakable capsule
US20110059831 *Oct 19, 2010Mar 10, 2011R.J. Reynolds Tobacco CompanyMethod and apparatus for incorporating objects into cigarette filters
US20110162662 *Jan 5, 2010Jul 7, 2011Aiger Group AgApparatus and method for insertion of capsules into filter tows
US20110162665 *Jan 7, 2010Jul 7, 2011Aiger Group AgMethod, system and apparatus for registration of different objects in rod shaped articles
US20110230320 *May 31, 2011Sep 22, 2011R.J. Reynolds Tobacco CompanyApparatus for inserting objects into a filter component of a smoking article, and associated method
US20160213060 *Jan 25, 2015Jul 28, 2016Mark ThalerMethod and apparatus for vapor catching
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Classifications
U.S. Classification206/242, 53/471
International ClassificationA24F13/06, A24F13/00, A24F1/00, A24F1/30
Cooperative ClassificationA24F13/06
European ClassificationA24F13/06