Tobacco smoke filter and method and apparatus for making same

Details Tobacco smoke filter and method and apparatus for making same Tobacco smoke filter and method and apparatus for making same

1981-05-07

1987-01-20

Millin, V.

Tobacco

Smoke separator or treater

By adding constituent to smoke stream

131339, 131340, 1311981, 131209, 131363, A24D 304

Patent

active

046374094

ABSTRACT:
An improved tobacco smoke filter is characterized by longitudinally continuous grooves running from end-to-end in the peripheral surface of a smoke-impervious filter plug wrap. Smoke-impervious tipping surrounds the plug wrap to seal the grooves except for small ventilation holes in the tipping which permit communication between the grooves and the ambient air. In a preferred embodiment, the grooves are restricted toward the mouth end of the filter and the degree of restriction determines the direction of air and smoke flow in the grooves. The grooves are each preferably formed as two longitudinal sections of different cross-section. Apparatus and method for manufacturing the filter are disclosed.

REFERENCES:
patent: 3324862 (1967-06-01), De Simone
patent: 4149546 (1979-04-01), Luke
patent: 4256122 (1981-03-01), Johnson

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