Tobacco smoke filter

Details Tobacco smoke filter Tobacco smoke filter

1975-10-30

1977-07-12

Pitrelli, John F.

Tobacco

Cigar or cigarette making

Including cooperating surfaces to induce rolling

131 105, A24D 104, A24F 504

Patent

active

040347656

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.

REFERENCES:
patent: 3313306 (1967-04-01), Berger et al.
patent: 3348553 (1967-10-01), Huber
patent: 3396061 (1968-08-01), Browne
patent: 3405717 (1968-10-01), Berger et al.
patent: 3596663 (1971-08-01), Schultz et al.
patent: 3630210 (1971-12-01), Haslam
patent: 3791265 (1974-02-01), Westcott et al.
patent: 3860011 (1975-01-01), Norman
patent: 3888160 (1975-06-01), Westcott et al.

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