Process for preparing compound filter

Details Process for preparing compound filter Process for preparing compound filter

1982-08-23

1984-07-17

Millin, V.

Tobacco

Smoke separator or treater

Having means to vary smoke flow rate

131340, 131341, A24D 304

Patent

active

044600011

ABSTRACT:
A process for preparing a compound cigarette filter, the filter having the ability to deliver substantially constant tar and nicotine as the cigarette is smoked. The compound filter comprises a barrier positioned upstream and in abutting relationship with at least one filter segment, the barrier containing passageways permitting the passage of smoke from a tobacco column to the filter segment, the total cross-sectional passageway area being from 0.5 to 3 square millimeters, the compound filter having an initial totally encapsulated pressure drop of at least 90 mm. H.sub.2 O.

REFERENCES:
patent: 2954772 (1960-10-01), Lebert
patent: 2954778 (1960-10-01), Lebert
patent: 2954786 (1960-10-01), Lebert
patent: 4091821 (1978-05-01), Scorzo
patent: 4197863 (1980-04-01), Clayton et al.
patent: 4219033 (1980-08-01), Horsewell et al.

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