Combustible carbon filter and smoking product

Details Combustible carbon filter and smoking product Combustible carbon filter and smoking product

1981-08-25

1984-11-13

Millin, V.

Tobacco

Smoke separator or treater

131334, 131359, 131364, 131369, A24D 118, A24D 300, A24D 302, A24D 306

Patent

active

044819587

ABSTRACT:
The present invention provides a method according to which a cellulose rod, at least 11 mm in diameter and formed from cellulosic paper made by the wet paper-making process, that has been treated with a binding agent, repeatedly folded along its longitudinal axis and passed through a heated forming die to provide a coherent rod, is treated with an additive and then pyrolyzed by being advanced through a die maintained at a temperature within the range of from about 500.degree. C. to about 1000.degree. C. in an oxygen-free atmosphere for a total retention time in the die of from about 3 seconds to about 1 minute. The pyrolyzed cellulose rod is then cooled to less than about 250.degree. C. before being removed from the oxygen-free atmosphere. The resulting combustible carbonized rod may be cut to suitable lengths and employed as a filter in tobacco-containing cigarettes or may be used to form a tobacco-free cigarette.

REFERENCES:
patent: 2987686 (1959-10-01), Siegel
patent: 3943941 (1976-03-01), Boyd et al.
patent: 4044777 (1977-08-01), Boyd et al.
patent: 4079742 (1978-03-01), Rainer et al.
patent: 4219031 (1980-08-01), Rainer et al.
patent: 4256123 (1981-03-01), Lenduay et al.
patent: 4256126 (1981-03-01), Seligman et al.
patent: 4286604 (1981-09-01), Ehretsmann et al.

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