Tobacco – Smoke separator or treater – By adding constituent to smoke stream
Patent
1978-03-14
1981-06-16
Millin, V.
Tobacco
Smoke separator or treater
By adding constituent to smoke stream
131338, 131339, 131340, 131344, A24D 304
Patent
active
042731410
ABSTRACT:
A tobacco smoke filter having at least one directly ventilated cavity which provides for the formation, over a region of the filter extending inwardly of its peripheral region, of a mixture of at least the major proportion of the smoke and at least a major proportion of the ventilating air entering the said cavity or cavities. The extensive and uniform mixing of smoke and ventilation air gives a satisfying smoke with a low tar count and high nicotine/tar ratio, and can be obtained with the invention due to appropriate shaping of the cavity, or asymmetric positioning of the air ventilating vents, or by means of a flow-disturbing insert mounted in the filter, or a combination of two or more of these factors. Preferably a major part of the smoke is constrained to enter the cavity at an upstream peripheral extremity thereof and air vents are also concentrated at this extremity.
REFERENCES:
patent: 2819720 (1958-01-01), Burbig
patent: 3756250 (1973-09-01), Morgenstern
patent: 3811451 (1974-05-01), Berger
patent: 3910288 (1975-10-01), Hammersmith et al.
patent: 4135523 (1979-01-01), Luke et al.
No affiliations
Groff, Jr. Emory L.
Millin V.
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