Cigarette having porous heat transfer tube

Details Cigarette having porous heat transfer tube Cigarette having porous heat transfer tube

2005-04-26

2005-04-26

Walls, Dionne A. (Department: 1731)

Tobacco

Tobacco or tobacco substitute product or component part thereof

Cigar or cigarette

C131S361000, C131S360000

Reexamination Certificate

active

06883523

ABSTRACT:
A smoking article includes a cylinder of smoking material, a filter attached to the cylinder of smoking material, and a tube of preferably porous and/or perforated material adapted to collapse at an open end upon exposure to thermal energy and preferably extending from one end portion of the smoking material to the junction of the filter and the cylinder of smoking material. Thermal energy generated by a burning portion of the tobacco filler material within the cylinder of smoking material is transferred by convection through the open portion of the tube after the end portion of the tube has collapsed closed by the heat from the burning portion of the tobacco.

REFERENCES:
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patent: 3756249 (1973-09-01), Selke et al.
patent: 4340072 (1982-07-01), Bolt et al.
patent: 4732168 (1988-03-01), Resce et al.
patent: 4924886 (1990-05-01), Litzinger
patent: 4984588 (1991-01-01), Stewart
patent: 5060676 (1991-10-01), Hearn et al.
patent: 5458107 (1995-10-01), Balogh et al.
patent: 5690127 (1997-11-01), Chapman et al.
patent: 5954061 (1999-09-01), Cardarelli
Written Opinion for PCT/US04/04530 dated Aug. 5, 2004.
Notification of Transmittal of the International Search Report or the Declaration for PCT/US04/04530 dated Aug. 5, 2004.

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