EP 0082734 A2 19830629 - Smoke filters and their production.
Title (en)
Smoke filters and their production.
Title (de)
Rauchfilter und deren Herstellung.
Title (fr)
Filtres à fumée et leur fabrication.
Publication
Application
Priority
- US 33380281 A 19811223
- US 33381581 A 19811223
- US 44405682 A 19821123
Abstract (en)
A tobacco smoke filter comprising a rod (314) of smoke filter material having a thin plastics sleeve (318) extruded therearound, the outer surface of the sleeve conforming to the outer surface of the rod. The sleeve is suitably at least 100 times thinner than the greatest transverse dimension of the rod, and may be of the same material as the rod. The sleeve may be extruded over the rod with application of suction via the rod to vacuum from the sleeve to the rod periphery, especially if the rod has previously been grooved and/or squashed over parts of its length to a reduced cross-section.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
A24D 3/0237 (2013.01 - EP US); A24D 3/043 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE IT LI
DOCDB simple family (publication)
EP 0082734 A2 19830629; EP 0082734 A3 19851211; EP 0082734 B1 19910502; CA 1212008 A 19860930; DE 3280328 D1 19910606; GB 2113068 A 19830803; GB 2113068 B 19851127; HK 86489 A 19891110
DOCDB simple family (application)
EP 82306942 A 19821223; CA 417850 A 19821216; DE 3280328 T 19821223; GB 8236686 A 19821223; HK 86489 A 19891102