EP 1153169 A1 20011114 - METHOD AND DEVICE FOR PULP WEB FORMATION
Title (en)
METHOD AND DEVICE FOR PULP WEB FORMATION
Title (de)
VERFAHREN UND VORRICHTUNG ZUR PAPIERHERSTELLUNG
Title (fr)
PROCEDE ET DISPOSITIF DE FORMATION D'UNE AME DE PATE A PAPIER
Publication
Application
Priority
- FI 9900967 W 19991124
- FI 982539 A 19981124
Abstract (en)
[origin: WO0031337A1] The invention relates to a method and an apparatus for pulp web formation. The method comprises feeding pulp, having a dry content of about 1,5 %, from a headbox (2) into a wedge-shaped converging space (5) defined by two wires (3, 4) or the like, said wires or the like being supported on chamber units (6, 7), including at a given time at least one water-receiving chamber (8), having its pressure adjustable in such a way that the pulp can be maintained at an overpressure in the space (5). The method comprises increasing the dry content of the pulp in the converging space (5) to a value which is at least about 10 % to about 12 %. According to the invention, the method comprises subjecting the pulp present between the wires (3, 4) or the like in the downstream section of the converging space, or in its substantially immediate vicinity, to a compression in perpendicular direction (z direction). In the method, the compression performed in the vicinity of the converging space (5) or its downstream section is used for increasing the dry content of the pulp to a value which is at least about 18 %, preferably to a value which is about 20 %.
IPC 1-7
IPC 8 full level
D21F 9/02 (2006.01); D21F 1/00 (2006.01); D21F 1/48 (2006.01); D21F 9/00 (2006.01)
CPC (source: EP)
D21F 1/02 (2013.01); D21F 1/48 (2013.01); D21F 9/003 (2013.01)
Citation (search report)
See references of WO 0031337A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0031337 A1 20000602; AT E260360 T1 20040315; AU 1562300 A 20000613; CA 2351490 A1 20000602; CA 2351490 C 20070821; DE 69915130 D1 20040401; DE 69915130 T2 20041230; EP 1153169 A1 20011114; EP 1153169 B1 20040225; FI 109210 B 20020614; FI 982539 A0 19981124; FI 982539 A 20000525; JP 2002530547 A 20020917; JP 4523166 B2 20100811
DOCDB simple family (application)
FI 9900967 W 19991124; AT 99958204 T 19991124; AU 1562300 A 19991124; CA 2351490 A 19991124; DE 69915130 T 19991124; EP 99958204 A 19991124; FI 982539 A 19981124; JP 2000584137 A 19991124