EP 1245725 B1 20051207 - Method and device for regulating quality parameters of paper-, tissue- and pulp dewatering machines
Title (en)
Method and device for regulating quality parameters of paper-, tissue- and pulp dewatering machines
Title (de)
Verfahren und Vorrichtung zur Regelung von Qualitätsparametern bei Papier-, Tissue- und Zellstoffentwässerungsmaschinen
Title (fr)
Procédé et dispositif pour régler des paramètres de qualité d'une machine à papier, à tissu ou à égoutter
Publication
Application
Priority
AT 5072001 A 20010329
Abstract (en)
[origin: EP1245725A1] The stock inlet, for dewatering in a papermaking or tissue production machine, has at least one outflow for surplus fiber pulp suspension from the distributor. The distributor has a distribution chamber and a turbulence generator with a number of tubes in neighboring rows. The outflows are at the sides of the distribution chamber, to take part-flows in the direction of web travel. The stock inlet, for dewatering in a papermaking or tissue production machine, has outflows from the outermost tubes in the turbulence generating chamber, with control valves. The distribution chamber extends on both sides of the stock inlet, over the width of the uncontrolled zones at the edges of the paper web, across the web width. The width of the turbulence generating chamber is extended into the uncontrolled web edge zones, with additional and shorter turbulence tubes which are about one quarter the length of the other tubes. With a multi-layer stock inlet, separate outflows are fitted for each layer. An Independent claim is included for controlling the lateral profile of the paper web, using part-flows of the fiber pulp suspension at the edges drawn from the sides of the turbulence chamber.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
D21F 1/02 (2013.01 - EP US); D21F 1/022 (2013.01 - EP US); D21F 1/06 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1245725 A1 20021002; EP 1245725 B1 20051207; AT 409768 B 20021125; AT A5072001 A 20020315; AT E312232 T1 20051215; BR 0201003 A 20030114; DE 50205151 D1 20060112; MX PA02003160 A 20021105; US 2002148587 A1 20021017; US 6821390 B2 20041123
DOCDB simple family (application)
EP 02005501 A 20020311; AT 02005501 T 20020311; AT 5072001 A 20010329; BR 0201003 A 20020328; DE 50205151 T 20020311; MX PA02003160 A 20020326; US 10079502 A 20020318