Variable air dilution cigarette filters

Details Variable air dilution cigarette filters Variable air dilution cigarette filters

1987-05-06

1989-03-07

Millin, V.

Tobacco

Smoke separator or treater

By adding constituent to smoke stream

1311982, A24D 304

Patent

active

048097187

ABSTRACT:
A variable air dilution cigarette filter is disclosed. The air dilution filter comprises a thin, generally rigid cylindrical sleeve assembly comprising two sleeves frangibly or separably connected together and an overwrapped filter rod received in the sleeves so as to be rotatable with respect to one sleeve and fixed against rotation with respect to the other sleeve. Air dilution openings or perforations are provided in the one sleeve and the underlying filter rod overwrap so that relative rotation between the one sleeve and the filter rod varies the amount of diluting air which is allowed to pass through the sleeve and overwrap and into the filter rod and tobacco smoke.

REFERENCES:
patent: 2923647 (1960-02-01), Aghnides
patent: 2936763 (1960-05-01), Saffir
patent: 3359988 (1967-12-01), Thomson
patent: 3503406 (1970-03-01), Riegel et al.
patent: 4406295 (1983-09-01), Sanford et al.
patent: 4532943 (1985-08-01), Nichols et al.
patent: 4576187 (1986-03-01), Deal
patent: 4649941 (1987-03-01), Norman et al.
patent: 4649945 (1987-03-01), Norman et al.
patent: 4700725 (1987-10-01), Geiszler

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