Cigarette filters

Details Cigarette filters Cigarette filters

1977-08-29

1979-11-27

Millin, V.

Tobacco

Tobacco users' appliance

Device used for smoking

131198R, A24D 104, A24F 702, A24F 704

Patent

active

041755715

ABSTRACT:
A cigarette filter includes a barrel, a mouthpiece at one end and a cigarette-receptive tip at the other. A restricted orifice extends through a transverse wall within the barrel. An air inlet extends through the barrel wall at a location toward the mouthpiece from the transverse wall. Received within the barrel is a stem that defines a passage for the flow of smoke, and the inlet also communicates with that passage. The stem includes a nose which is spaced from the outlet end of the orifice and defines a collection area for particulate matter included in the smoke. A system concept includes a combination of a plurality of such filters in each successive one of which the orifice is of respectively decreased diameter and the air inlet is of respectively increased diameter. The relationship of those diameters is such that different ones of the filters establish a substantially constant impedance to the drawing of smoke and air through the mouthpiece.

REFERENCES:
patent: 3713452 (1973-01-01), D'Elia
patent: 4038994 (1977-08-01), Aikman
patent: 4049005 (1977-09-01), Hernandez et al.

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