Cigarette filter having low visible staining

Tobacco – Smoke separator or treater – Interior surface causes particular flow characteristic

Patent

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Details

131339, 131344, A24D 304

Patent

active

046932658

ABSTRACT:
Filter cigarettes exhibiting a low amount of visible staining have a tobacco rod, an axially aligned filter element having a barrier region positioned on the back face thereof such that air and smoke traveling through the filter element exits the filter element towards the periphery thereof, and an axially aligned tubular mouthpiece element positioned in a spaced apart relationship with the filter element such that air and smoke exiting the filter element travels through the path of least resistance provided by the spaced apart region and the hollow region of the tube.

REFERENCES:
patent: 3039367 (1962-06-01), Stelzer
patent: 3166079 (1965-01-01), Williamson
patent: 3308832 (1967-03-01), Stelzer et al.
patent: 3703429 (1972-11-01), Berger et al.
patent: 3860011 (1975-01-01), Norman
patent: 4331166 (1982-05-01), Hale
patent: 4564030 (1986-01-01), Jessup et al.

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