Production of cigarette filter units

Details Production of cigarette filter units Production of cigarette filter units

1978-07-21

1980-01-29

Baldwin, Robert D.

Tobacco

Tobacco users' appliance

Supports

93 1C, 93 77FT, A24C 550

Patent

active

041856457

ABSTRACT:
Cigarette filter units are made in a long strip with alternate portions of fibrous and pourable filter material. The fibrous portions are first attached at spaced intervals to a sheathing strip which is wrapped practically right around them to form a cylinder with regular empty spaces between the fibrous portions and openings into the spaces. In a special unit, air is extracted from these spaces so that when the spaces enter a chamber containing pourable filter material, they suck the material in to fully fill the spaces. Excess filter material is brushed off the filter unit, and a sealing strip is stuck over the openings.

REFERENCES:
patent: 3370592 (1968-02-01), Schultz et al.
patent: 3482488 (1969-12-01), Sexstone
patent: 3762281 (1973-10-01), Burrus et al.
patent: 3807286 (1974-04-01), Sexstone

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