Global Patent Index - EP 0792397 A1

EP 0792397 A1 19970903 - METHOD FOR DEWATERING IN PAPER MANUFACTURE

Title (en)

METHOD FOR DEWATERING IN PAPER MANUFACTURE

Title (de)

VERFAHREN ZUR ENTWÄSSERUNG BEI DER PAPIER HERSTELLUNG

Title (fr)

PROCEDE D'ESSORAGE DANS LA FABRICATION DU PAPIER

Publication

EP 0792397 A1 19970903 (EN)

Application

EP 95937918 A 19951116

Priority

  • FI 9500635 W 19951116
  • FI 945382 A 19941116

Abstract (en)

[origin: WO9615319A1] For applying a method according to the invention, the dewatering system is formed in a decentralized manner, wherein a separate dewatering unit (1a, 1b, 1c...) is formed for suction boxes (4) with the same negative pressure level. Further, a dewatering strategy is made on the basis of the yield of the suction pump (18) of the respective dewatering unit (1a, 1b, 1c...) and/or on the adjustment of the rotational speed of the electric motor (19) of the suction pump. When applying the method, the desired rate of removing a quantity of water (Vas) is selected in the respective dewatering unit and the quantity (Vm) of water separated is measured in the respective dewatering unit. The yield of the suction pump (18) of the dewatering unit (1a, 1b, 1c...) and/or the rotational speed of the electric motor (19) of the suction pump is adjusted on the basis of the dewatering strategy, if Vas NOTEQUAL Vm.

IPC 1-7

D21F 1/48

IPC 8 full level

D21F 1/48 (2006.01); D21F 1/52 (2006.01)

CPC (source: EP)

D21F 1/48 (2013.01)

Citation (search report)

See references of WO 9615319A1

Designated contracting state (EPC)

AT BE DE DK FR GB IT SE

DOCDB simple family (publication)

WO 9615319 A1 19960523; AU 3874495 A 19960606; CA 2206544 A1 19960523; EP 0792397 A1 19970903; FI 945382 A0 19941116; FI 945382 A 19960517; FI 97244 B 19960731; FI 97244 C 19961111; JP H10508664 A 19980825

DOCDB simple family (application)

FI 9500635 W 19951116; AU 3874495 A 19951116; CA 2206544 A 19951116; EP 95937918 A 19951116; FI 945382 A 19941116; JP 51577596 A 19951116