EP 0312512 A1 19890419 - Method of making three-layer paper.
Title (en)
Method of making three-layer paper.
Title (de)
Methode zum Herstellen von dreischichtigem Papier.
Title (fr)
Procédé pour produire du papier triplex.
Publication
Application
Priority
SE 8704040 A 19871016
Abstract (en)
The invention relates to a method of making a symmetrical three-layer paper of two heterogeneous stocks, one of which forms the top layers of the paper, and the other one forms the intermediate layer thereof. According to the invention, the top layer and substantially half the grammage of the intermediate layer are formed by co-forming in two separate head boxes, whereafter the two separately formed layers are combined at a dry solids content not exceeding 12%.
IPC 1-7
IPC 8 full level
D21F 11/04 (2006.01)
CPC (source: EP)
D21F 11/04 (2013.01)
Citation (search report)
WO 8505387 A1 19851205 - AHLSTROEM OY [FI]
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0312512 A1 19890419; BR 8805033 A 19890509; DE 312512 T1 19890824; ES 2007585 A4 19890701; FI 884763 A0 19881014; FI 884763 A 19890417; NO 884590 D0 19881014; NO 884590 L 19890417; PT 88754 A 19890731; SE 459263 B 19890619; SE 8704040 D0 19871016; SE 8704040 L 19890417
DOCDB simple family (application)
EP 88850286 A 19880831; BR 8805033 A 19880929; DE 88850286 T 19880831; ES 88850286 T 19880831; FI 884763 A 19881014; NO 884590 A 19881014; PT 8875488 A 19881013; SE 8704040 A 19871016