Cigarette filter

Details Cigarette filter Cigarette filter

1982-06-24

1984-03-27

Millin, V.

Tobacco

Smoke separator or treater

By adding constituent to smoke stream

131339, 131340, A24D 300, A24D 304

Patent

active

044387768

ABSTRACT:
A filter for a cigarette includes a generally cylindrical permeable filter rod circumscribed by an air permeable tipping material with a plurality of blind-end channels formed in the filter rod, each of the channels being open at one end to the upstream end of the filter rod and extending therefrom, generally in the longitudinal direction of the filter rod, a predetermined distance less than the length of the filter rod.

REFERENCES:
patent: 3621851 (1971-11-01), Heskett et al.
patent: 3752165 (1973-08-01), Harlee et al.
patent: 3860011 (1975-01-01), Norman
patent: 3910288 (1975-10-01), Hammersmith et al.
patent: 4342322 (1982-08-01), Sanford
patent: 4393885 (1983-07-01), Silferstein

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