Method and apparatus for making cigarette filters of filamentary

Details Method and apparatus for making cigarette filters of filamentary Method and apparatus for making cigarette filters of filamentary

1977-10-13

1980-07-29

Coan, James F.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

28243, 264167, A24C 550, D02J 122

Patent

active

042145082

ABSTRACT:
In the course of continuous transport of filamentary material, mutually spaced portions thereof are selectively stretched, yielding articles having a longitudinal profile varying in filamentary material volume and of essentially constant filament density per unit volume. In producing cigarette filters, additive material is applied to the stretched material portions.

REFERENCES:
patent: 1898085 (1933-02-01), Dreyfus et al.
patent: 2038722 (1936-04-01), Dreyfus et al.
patent: 2847703 (1958-08-01), Schrenk et al.
patent: 3394429 (1968-07-01), Nakagawa et al.
patent: 3561045 (1971-02-01), Heffernan
patent: 3837264 (1974-09-01), Sexstone
patent: 3844200 (1974-10-01), Sexstone
patent: 3847064 (1974-11-01), Berger
patent: 3884741 (1975-05-01), Sexstone
patent: 3910166 (1975-10-01), Sexstone

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