Smoking article filters

Details Smoking article filters Smoking article filters

1984-02-13

1988-02-16

Millin, V.

Tobacco

Smoke separator or treater

By adding constituent to smoke stream

131361, A24D 304

Patent

active

047248483

ABSTRACT:
A smoking article comprises a wrapped rod of smoking material, a filter element and a tipping wrapper by which the rod and filter element are interattached. The filter element comprises a body of fibrous filtration material and paper wrapper securing the filtration material. Opening means is provided in the paper wrapper extending longitudinally along the filter element and providing at least one ventillation-air distribution space bounded by the tipping wrapper. Ventilation air is permitted to ingress into the space at a first location, whereby air may flow through the space and then to enter the filtration material at a second location spaced longitudinally from the filter element. The smoking article of the invention has a number of advantages and represents an advance in the art in that it makes possible a more direct and better distributed flow of ventilation air into wrapped filter elements of smoking articles containing such elements.

REFERENCES:
patent: 4232574 (1980-11-01), Hall
patent: 4343319 (1982-08-01), Cantrell
patent: 4406295 (1983-09-01), Sanford et al.

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