Tobacco smoke filters

Details Tobacco smoke filters Tobacco smoke filters

1985-05-14

1986-11-04

Millin, V.

Tobacco

Tobacco users' appliance

Device used for smoking

1312151, 1312152, 1312153, 131336, A24D 304

Patent

active

046205535

ABSTRACT:
A filter for a smoking article employing a resilient valve assembly in the path of the smoke. The valve assembly being movable in a first position in which the flow ventilating air is permitted and a second position in which the flow of air is prevented. The valve assembly being resiliently biased towards the first position and being displaceable towards the second position when a particular pressure differential is exceeded.

REFERENCES:
patent: 3628543 (1971-12-01), Bemont
patent: 3685522 (1972-08-01), Kleinhaus

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