Tobacco smoke filters

Details Tobacco smoke filters Tobacco smoke filters

A - Human Necessities

24

D

131/17

A24D 3/00 (2006.01) A24D 3/04 (2006.01) A24F 7/04 (2006.01) A24F 13/06 (2006.01)

Patent

CA 1188591

TOBACCO SMOKE FILTERS Abstract of the Invention A filter for cigarette smoke is formed by a generally tubular member (10) having a primary barrier wall (24) extending across the midregion of its interior. Smoke is accelerated from the upstream chamber to the down- stream chamber (50) in the filter through a small accel- erating opening (26) in the midregion of that barrier. A downstream target, or barrier (28), whose surface area is no greater than the cross-sectional area of the accel- erating opening is placed downstream from the opening at a distance which is preferably no greater than the diameter of the accelerating opening. Collection vanes (52-56) at the upstream end of the downstream chamber (50) are formed downstream from the barrier (24) combine with the action of the target (28) to separate liquids and semi- solids from the smoke, and to collect them, at the upstream end of the downstream chamber (50).

403753

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