Filter

Details Filter Filter

1974-03-12

1977-02-15

Pitrelli, John F.

Tobacco

Tobacco users' appliance

Supports

A24D 106

Patent

active

040077454

ABSTRACT:
Improved aerosol filters, particularly cigarette filters, are prepared by imparting a patterned surface, preferably a plurality of longitudinal grooves, to a web of a synthetic thermoplastic fibrous material, preferably a tow of longitudinally aligned crimped continuous cellulose acetate filaments, and forming the resultant patterned web into a filter of the desired form.

REFERENCES:
patent: 2464301 (1949-03-01), Francis
patent: 2931748 (1960-04-01), Muller
patent: 3180911 (1915-04-01), Muller
patent: 3224453 (1965-12-01), Mahoney et al.
patent: 3226280 (1965-12-01), Muller
patent: 3238852 (1966-03-01), Schur et al.

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