Tobacco – Smoke separator or treater – By adding constituent to smoke stream
Patent
1981-04-17
1983-04-19
Millin, V.
Tobacco
Smoke separator or treater
By adding constituent to smoke stream
131338, 131339, 131340, A24D 304, A24D 318
Patent
active
043802419
ABSTRACT:
A smoking article comprises a smoking material rod and, to one end thereof, a flow-impedance device comprising a rod-like element of foam or fibrous material which is or has been rendered impervious to the flow of smoke therethrough and one or more open-ended smoke-flow passages extending from one end to the other of the element, the pressure drop of the passage or passages being in the range from 40 to 200 mm, preferably 50 to 100 mm, water gauge and said device being enclosed in a wrapping permitting inward flow of ambient air into the device, which has air-conducting means whereby air flowing inwardly through the wrapping is conducted to the mouth end of the device, the device being effective to remove not more than 25%, preferably 20%, of the total particulate matter of the smoke. The passage or passages may be formed by a bore or bores in the material or by a capillary tube or tubes.
REFERENCES:
patent: 1718122 (1929-06-01), De Shon
patent: 2819720 (1958-01-01), Burbig
patent: 3490461 (1970-01-01), Osmalov et al.
patent: 4135523 (1979-01-01), Luke et al.
patent: 4256122 (1981-03-01), Johnson
British-American Tobacco Company Limited
Millin V.
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