EP 0282379 B1 19920102 - METHOD FOR MANUFACTURING WET FELTS, AND MACHINE FOR COMPACTING FIBRE WEBS
Title (en)
METHOD FOR MANUFACTURING WET FELTS, AND MACHINE FOR COMPACTING FIBRE WEBS
Publication
Application
Priority
FR 8702777 A 19870302
Abstract (en)
[origin: US4842929A] Process of manufacturing felts in which a batt is fastened to a felt on its one or two sides, said batt (5) consisting of one or several layers of fibers and characterized in that said layers are obtained from carding the fibers and possibly preneedling them by passage through a preneedling machine with low density needles, said layers being densified by at least three passages through a needling machine (1) with high needle density, and at least one of those passages going in the opposite direction of the others, said batt (5) created in such a way then being fastened to the felt (10). The wet felt obtained in this way has very good cohesion and very high resistance, and the felt is neither damaged nor filled with fibers, which provides it with good air and water permeability. The invention also relates to a machine to densify batts.
IPC 1-7
IPC 8 full level
D04H 1/46 (2006.01); D04H 1/498 (2012.01); D04H 13/00 (2006.01); D04H 18/00 (2006.01)
CPC (source: EP KR US)
D04H 1/46 (2013.01 - KR); D04H 1/498 (2013.01 - EP US); D04H 13/00 (2013.01 - EP US); D04H 18/02 (2013.01 - EP KR US); D21F 7/083 (2013.01 - EP US); Y10T 442/3724 (2015.04 - EP US); Y10T 442/3732 (2015.04 - EP US); Y10T 442/378 (2015.04 - EP US); Y10T 442/3789 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI NL SE
DOCDB simple family (publication)
EP 0282379 A1 19880914; EP 0282379 B1 19920102; AT E71163 T1 19920115; CA 1311115 C 19921208; DE 3867261 D1 19920213; ES 2028308 T3 19920701; FI 880904 A0 19880226; FI 880904 A 19880903; FR 2611752 A1 19880909; FR 2611752 B1 19890505; GR 3003561 T3 19930316; KR 880011393 A 19881028; NO 168374 B 19911104; NO 168374 C 19920212; NO 880884 D0 19880229; NO 880884 L 19880905; US 4842929 A 19890627; ZA 881475 B 19880823
DOCDB simple family (application)
EP 88400342 A 19880216; AT 88400342 T 19880216; CA 560521 A 19880301; DE 3867261 T 19880216; ES 88400342 T 19880216; FI 880904 A 19880226; FR 8702777 A 19870302; GR 920400018 T 19920113; KR 880002162 A 19880302; NO 880884 A 19880229; US 16255688 A 19880301; ZA 881475 A 19880302