EP 0217743 B1 19901205 - CIGARETTE FILTER UNIT AND METHOD FOR MAKING IT
Title (en)
CIGARETTE FILTER UNIT AND METHOD FOR MAKING IT
Publication
Application
Priority
CH 366585 A 19850826
Abstract (en)
[origin: US4791943A] In order, when a cigarette is being smoked, to reduce, or even reverse, the tendency of the condensate-content to increase, a cigarette filter unit is proposed in which at least one partition having at least two areas of different porosities and made of a material which allows smoke to pass through it, is arranged between each two filter elements aligned axially with one another in the flow cross section of the filter unit. In this connection, a first partition area is designed in such a manner that its permeability decreases as the portion of tobacco associated with the cigarette filter unit is smoked, the tobacco smoke, passing through the said cigarette filter unit, flowing increasingly through the second partition area.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
A24D 3/0283 (2013.01 - EP US); A24D 3/04 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0217743 A1 19870408; EP 0217743 B1 19901205; AT E58821 T1 19901215; CA 1255990 A 19890620; CH 669309 A5 19890315; DE 3676031 D1 19910117; JP S6248369 A 19870303; US 4791943 A 19881220
DOCDB simple family (application)
EP 86810378 A 19860825; AT 86810378 T 19860825; CA 516105 A 19860815; CH 366585 A 19850826; DE 3676031 T 19860825; JP 19987986 A 19860826; US 89947386 A 19860822