EP 0461162 B1 19970709 - UNIFORM TAR DELIVERY PROFILE FILTER
Title (en)
UNIFORM TAR DELIVERY PROFILE FILTER
Title (de)
FILTER MIT EINER GLEICHMÄSSIGEN ABGABE VON TEER
Title (fr)
FILTRE A COURBE DE LIBERATION DU GOUDRON UNIFORME
Publication
Application
Priority
- CA 9000070 W 19900301
- GB 8909660 A 19890427
- GB 8904752 A 19890302
Abstract (en)
[origin: WO9009741A1] A tobacco smoke filter element (14) produces a more uniform tar delivery profile without an unacceptable pressure drop by causing the cigarette smoke to assume a progressively longer flow path through an outer cylinder (20) of higher flow resistance filter tow material before passing radially inwardly through a cylinder (24) of microfine fibres into a low resistance flow path (26) to the smoker's mouth. The progressively increased flow path results from progressive clogging of the cylinder of microfine fibres by filtered material as smoking of the cigarette progresses.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
A24D 3/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
WO 9009741 A1 19900907; AU 5268990 A 19900926; AU 629320 B2 19921001; CA 2049573 A1 19910902; CA 2049573 C 19970114; DE 69031032 D1 19970814; DE 69031032 T2 19980129; EP 0461162 A1 19911218; EP 0461162 B1 19970709; JP 2701974 B2 19980121; JP H04503753 A 19920709
DOCDB simple family (application)
CA 9000070 W 19900301; AU 5268990 A 19900301; CA 2049573 A 19900301; DE 69031032 T 19900301; EP 90904210 A 19900301; JP 50451290 A 19900301