EP 1155191 A1 20011121 - METHOD FOR EXECUTING GRADE CHANGE ON A PAPER MACHINE
Title (en)
METHOD FOR EXECUTING GRADE CHANGE ON A PAPER MACHINE
Title (de)
VERFAHREN ZUR QUALITÄTSVERÄNDERUNG AUF EINER PAPIERMASCHINE
Title (fr)
PROCEDE DE REALISATION D'UN CHANGEMENT DE QUALITE DANS UNE MACHINE A PAPIER
Publication
Application
Priority
- FI 9901000 W 19991202
- FI 982626 A 19981204
Abstract (en)
[origin: WO0034578A1] The invention relates to a method and system for executing grade change in a paper machine. In the method, a controller (120) controls at least two input variables affecting the paper machine process, which variables affect the same output variable which represents the property defining the paper grade. The controller (120) controls at least one input variable toward the setting of the second grade before the grade change while the first grade is being manufactured. The controller (120) compensates the impact of said input variable on the output variable with at least a second input variable to keep the output variable substantially unchanged until the end of the manufacture of the first grade. Corresponding action can also be taken at the end of the grade change.
IPC 1-7
IPC 8 full level
D21G 9/00 (2006.01)
CPC (source: EP)
D21G 9/0027 (2013.01); D21G 9/0036 (2013.01)
Citation (search report)
See references of WO 0034578A1
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 0034578 A1 20000615; AU 1661100 A 20000626; CA 2353597 A1 20000615; EP 1155191 A1 20011121; FI 106055 B 20001115; FI 982626 A0 19981204; FI 982626 A 20000605
DOCDB simple family (application)
FI 9901000 W 19991202; AU 1661100 A 19991202; CA 2353597 A 19991202; EP 99959443 A 19991202; FI 982626 A 19981204