EP 0785305 B1 20020313 - Process for operating a headbox of a papermaking machine
Title (en)
Process for operating a headbox of a papermaking machine
Title (de)
Verfahren zum Betreiben eines Stoffauflaufes einer Papiermaschine
Title (fr)
Procédé de commande d'une caisse de tête d'une machine à papier
Publication
Application
Priority
- DE 4019593 A 19900620
- EP 91109409 A 19910608
Abstract (en)
[origin: EP0462472A1] The invention relates to a headbox for papermaking machines, having a distributor for distributing a fed pulp suspension over the working width of the papermaking machine, a guiding device, having a multiplicity of holes or channels, for the pulp suspension and an outflow channel, as wide as the machine, with an outflow gap for distributing the pulp suspension, and also with means for adjusting the stock consistency of the pulp suspension across the working width. The invention is characterised by the following features: (a) The headbox is divided by partitions into sections across its width; (b) the individual section has at least one inlet line for feeding a part-stream (sectional stream); (c) a mixer is provided upstream of the individual inlet line; (d) the mixer has at least two connections for supplying suspension streams (control streams) with preset operating parameters (throughput, stock consistency, fibre quality). <IMAGE>
IPC 1-7
IPC 8 full level
D21F 1/00 (2006.01); D21F 1/02 (2006.01); D21F 1/06 (2006.01); D21F 1/08 (2006.01)
CPC (source: EP)
D21F 1/02 (2013.01); D21F 1/026 (2013.01); D21F 1/028 (2013.01); D21F 1/08 (2013.01)
Citation (examination)
FR 2631353 A1 19891117 - SEMTI [FR]
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0462472 A1 19911227; AT E214442 T1 20020315; AT E227370 T1 20021115; CA 2045038 A1 19911221; CA 2045038 C 20060214; DE 4019593 A1 19920109; DE 4019593 C2 19940120; DE 59109230 D1 20020418; DE 59109243 D1 20021212; EP 0785305 A1 19970723; EP 0785305 B1 20020313; EP 0789107 A2 19970813; EP 0789107 A3 20000119; EP 0789107 B1 20021106; FI 20020790 A 20020424; FI 912230 A0 19910508; FI 912230 A 19911221; JP 3301623 B2 20020715; JP H04333688 A 19921120
DOCDB simple family (application)
EP 91109409 A 19910608; AT 96120331 T 19910608; AT 97101711 T 19910608; CA 2045038 A 19910620; DE 4019593 A 19900620; DE 59109230 T 19910608; DE 59109243 T 19910608; EP 96120331 A 19910608; EP 97101711 A 19910608; FI 20020790 A 20020424; FI 912230 A 19910508; JP 17460891 A 19910619