Cigarette filter tip

Details Cigarette filter tip Cigarette filter tip

1976-02-06

1977-04-05

Michell, Robert W.

Tobacco

Cigar or cigarette making

Including cooperating surfaces to induce rolling

131261R, 131263, A24B 1502

Patent

active

040156109

ABSTRACT:
A cigarette filter tip comprises three filter elements disposed end-to-end within a tubular outer coating of transparent sheet material. The two filter elements at the ends of the filter tip are of fibrous material while the central element is granular and comprises an iron sulfate which changes color upon reaction with hydrogensulfide in the cigarette smoke to form an iron sulfide. A paper band which units the tip with the cigarette extends only around one of the fibrous filter elements of the tip, thus leaving the granular filter element wholly visible.

REFERENCES:
patent: 3370592 (1968-02-01), Schultz et al.
The Condensed Chemical Dictionary, 5th edition, Reinhold. Pub. Co., N. Y., 1956, p. 677.

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