EP 3729978 A4 20210825 - COMBINED FILTER FOR REMOVING TARS AND TOXIC COMPOUNDS FROM TOBACCO SMOKE
Title (en)
COMBINED FILTER FOR REMOVING TARS AND TOXIC COMPOUNDS FROM TOBACCO SMOKE
Title (de)
KOMBINIERTER FILTER ZUR ENTFERNUNG VON TEEREN UND TOXISCHEN VERBINDUNGEN AUS TABAKRAUCH
Title (fr)
FILTRE COMBINÉ POUR L'ÉLIMINATION DE GOUDRONS ET DE COMPOSÉS TOXIQUES DE LA FUMÉE DU TABAC
Publication
Application
Priority
- ES 201731446 A 20171221
- ES 2018070710 W 20181105
Abstract (en)
[origin: EP3729978A1] The invention relates to a combined filter for removing tars and toxic compounds from tobacco smoke, which is applied to any type of tobacco rod, comprising a primary membrane (M1) located at the end of the tobacco rod, made up of at least one disc of impervious material and perforated with at least one hole that extends through same in a direction perpendicular to the cross-section of the membrane, so that the perforated surface has a free flow area of 0.2 % to 30 % of the total cross-section of the membrane; an outer membrane (M3) located at the end in contact with the smoker and made up of a cellulose-acetate fibre; which can include a cylindrical intermediate membrane (M2) formed by an adsorbent material between the primary membrane (M1) and the outer membrane (M3).
IPC 8 full level
CPC (source: EP ES US)
A24D 3/04 (2013.01 - EP ES US); A24D 3/045 (2013.01 - EP); A24D 3/10 (2013.01 - EP ES); A24D 3/163 (2013.01 - EP); A24D 3/166 (2013.01 - EP)
Citation (search report)
- [XI] US 4469112 A 19840904 - BROWNE COLIN L [US], et al
- [XI] GB 996891 A 19650630 - TAMAG BASEL A G
- [X] US 3492998 A 19700203 - MASCARO JOHN A
- [X] EP 0364256 A1 19900418 - ROTHMANS INT TOBACCO [GB]
- [XI] US 3395713 A 19680806 - ANNI ENT-KELLER
- [XI] EP 0482872 A1 19920429 - ROTHMANS INT TOBACCO [GB]
- See references of WO 2019122468A1
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3729978 A1 20201028; EP 3729978 A4 20210825; ES 2717550 A1 20190621; ES 2717550 B2 20200228; WO 2019122468 A1 20190627
DOCDB simple family (application)
EP 18891845 A 20181105; ES 201731446 A 20171221; ES 2018070710 W 20181105