Tobacco smoke filter having improved tar/carbon monoxide ratio

Details Tobacco smoke filter having improved tar/carbon monoxide ratio Tobacco smoke filter having improved tar/carbon monoxide ratio

1980-05-27

1982-11-09

Millin, V.

Tobacco

Smoke separator or treater

Having means to vary smoke flow rate

131339, 131340, 131344, 131332, A24D 304, A24D 300

Patent

active

043579507

ABSTRACT:
A tobacco smoke filter having an improved tar/carbon monoxide ratio is disclosed. The filter is obtained by sealing off the center portion of the filter with an inner member which is impermeable to the passage of smoke, thus directing all of the smoke to the periphery of the filter. In one embodiment, the inner member is formed as a thin walled tube of a material such as polypropylene, with the tube being crimped to seal one end of the tube. The crimped tube is then overwrapped with a smoke permeable material.

REFERENCES:
patent: 3297041 (1967-01-01), Sproull et al.
patent: 3389705 (1968-06-01), Levavi
patent: 3496945 (1970-02-01), Tomkin
patent: 3599646 (1971-08-01), Berger
patent: 3637447 (1972-01-01), Berger
patent: 3841338 (1974-10-01), Horsewell et al.
patent: 3964493 (1976-06-01), Baker
patent: 4046063 (1977-09-01), Berger
patent: 4064791 (1971-12-01), Berger

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