Method and apparatus for making tobacco smoke filter

Details Method and apparatus for making tobacco smoke filter Method and apparatus for making tobacco smoke filter

1977-04-25

1978-05-09

Coan, James F.

93 77FT, A24C 550

Patent

active

040880656

ABSTRACT:
This invention relates to a cigarette filter composed of two concentric cylindrical layers of fibrous filter materials, in which the inner cylindrical layer has a lower draw resistance than the outer cylindrical layer, and a method and apparatus for the manufacture thereof.

REFERENCES:
patent: 2852987 (1958-09-01), Schanz
patent: 2999503 (1961-09-01), Schur et al.
patent: 3860011 (1975-01-01), Norman
patent: 4046063 (1977-09-01), Berger

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