Cigarette filter

Tobacco – Smoke separator or treater – By adding constituent to smoke stream

Patent

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Details

131361, 131362, 131363, A24D 304

Patent

active

043621724

ABSTRACT:
A filter for a cigarette includes a porous filter rod circumscribed by a non-porous wrapper and a tipping material having selected openings therein for allowing ventilating air to pass therethrough. Spacing members are disposed between the non-porous wrapper and tipping material to form ventilating air channels therebetween.

REFERENCES:
patent: 3490461 (1970-01-01), Osmalov et al.
patent: 3607512 (1971-09-01), Mathe

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