EP 2328432 A1 20110608 - FILTER FOR A SMOKING ARTICLE
Title (en)
FILTER FOR A SMOKING ARTICLE
Title (de)
FILTER FÜR RAUCHARTIKEL
Title (fr)
FILTRE POUR ARTICLE À FUMER
Publication
Application
Priority
- GB 2009050908 W 20090723
- GB 0813567 A 20080724
Abstract (en)
[origin: WO2010010397A1] The present invention relates to smoking articles incorporating an improved filter in which the amount of smoke filtration varies with increased strength of draw. In particular, the filter comprises a plurality of passageways, at least one primary passageway I comprising a section of material which extends from the rod of smokable material to the mouth end of the smoking article and which has a high capacity to filter smoke and a high capacity to resist the passage of smoke. Via a series of small holes in an otherwise non-porous interface between the different passageways, smoke may be drawn between the primary passageway I and one or more secondary passageways II which have a low capacity to filter and resist the passage of smoke. At lower strengths of draw, smoke may become drawn through the small holes between the primary and secondary passageways. At higher strengths of draw, however, the rate at which smoke may pass through the small holes is limited by the restricted orifice effect and in this way the level of filtration of the smoke at different strengths of draw may be controlled.
IPC 8 full level
A24D 3/04 (2006.01)
CPC (source: EP KR US)
A24D 1/045 (2013.01 - KR); A24D 3/0295 (2013.01 - KR); A24D 3/04 (2013.01 - EP US); A24D 3/045 (2013.01 - EP US); A24D 3/067 (2013.01 - KR)
Citation (search report)
See references of WO 2010010397A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
WO 2010010397 A1 20100128; AR 074708 A1 20110209; AU 2009275329 A1 20100128; AU 2009275329 B2 20140130; BR PI0916539 A2 20151110; CA 2731233 A1 20100128; CL 2011000081 A1 20110617; CN 102105073 A 20110622; EP 2328432 A1 20110608; GB 0813567 D0 20080903; JP 2011528900 A 20111201; KR 20110038700 A 20110414; MX 2011000453 A 20110224; RU 2011106362 A 20120827; UA 100435 C2 20121225; US 2011186063 A1 20110804; ZA 201100572 B 20140625
DOCDB simple family (application)
GB 2009050908 W 20090723; AR P090102811 A 20090723; AU 2009275329 A 20090723; BR PI0916539 A 20090723; CA 2731233 A 20090723; CL 2011000081 A 20110113; CN 200980128854 A 20090723; EP 09785382 A 20090723; GB 0813567 A 20080724; JP 2011519244 A 20090723; KR 20117004364 A 20090723; MX 2011000453 A 20090723; RU 2011106362 A 20090723; UA A201101829 A 20090723; US 200913055437 A 20090723; ZA 201100572 A 20110121