Tobacco smoke filters

Details Tobacco smoke filters Tobacco smoke filters

1986-07-10

1988-07-05

Millin, V.

Tobacco

Smoke separator or treater

Interior surface causes particular flow characteristic

131340, 131344, A24D 304

Patent

active

047547669

ABSTRACT:
A tobacco smoke filtration element having a first smoke-flow passage of filtration efficiency less than that of a second smoke-flow passage, the first smoke-flow passage being provided with a heat deformable material which, upon smoking of a smoking article incorporating such a filtration element, deforms and thereby obturates the first smoke-flow passage causing smoke to pass along the second smoke-flow passage and thereby to be subjected to a higher degree of smoke filtration after the first stages of the smoking cycle.

REFERENCES:
patent: 3800805 (1974-04-01), Horsewell et al.
patent: 3916914 (1975-11-01), Brooks et al.
patent: 4380241 (1983-04-01), Horsewell
patent: 4474192 (1984-10-01), MacLean et al.

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