Cigarette filter

Details Cigarette filter Cigarette filter

1980-11-28

1982-08-10

Millin, V.

Tobacco

Smoke separator or treater

By adding constituent to smoke stream

131338, 131339, A24B 304

Patent

active

043433197

ABSTRACT:
A filter for a cigarette includes a porous filter rod with at least one opening in each end thereof with at least one longitudinal groove embedded into the outer periphery of the rod intermediate the openings and in flow communication therewith. The filter rod is wrapped with non-porous plug wrap and overlaid with porous tipping material with the flow-through groove being between the plug wrap and the tipping material so that a portion of the smoke coming from a tobacco column mixes with ventilating air in the groove and the remaining portion of the tobacco smoke passes through the filter, with little or no contact with ventilating air until it reaches the smoker's mouth.

REFERENCES:
patent: 3490461 (1970-01-01), Osmalov et al.
patent: 3910288 (1975-10-01), Hammersmith et al.

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