EP 1012383 A1 20000628 - METHOD FOR CONTROL OF THE CURL OF PAPER IN THE DRYER SECTION OF A PAPER MACHINE AND PAPER OR BOARD MACHINE
Title (en)
METHOD FOR CONTROL OF THE CURL OF PAPER IN THE DRYER SECTION OF A PAPER MACHINE AND PAPER OR BOARD MACHINE
Title (de)
VERFAHREN ZUR STEUERUNG VON PAPIERBLATTWELLUNGEN IN DER TROCKENPARTIE EINER PAPIER - ODER PAPPEMASCHINE
Title (fr)
PROCEDE POUR EMPECHER LE GONDOLAGE DU PAPIER DANS LA SECHERIE D'UNE MACHINE A PAPIER ET D'UNE MACHINE A PAPIER OU A CARTON
Publication
Application
Priority
- FI 9800253 W 19980323
- FI 971301 A 19970327
Abstract (en)
[origin: WO9844191A1] The invention concerns a method in the dryer section of a paper or board machine for control of the curl of paper, in which method steam treatment and/or moistening of the paper web (W) is/are employed. In the method, the operations carried out in view of controlling the curl of the paper web (W) are carried out in a number of stages and/or when the web (W) temperature is lower than 85 DEG C, preferably lower than 75 DEG C, and/or when the dry solids content of the web (W) is in the range of K1...K2, wherein K1 = ultimate dry solids content - 7 % and K2 = ultimate dry solids content + 3 %. Further, the invention concerns a paper or board machine, which comprises at least a headbox, a former, a press, and a dryer section, in which steam boxes or moistening devices are employed for control of the curl. There are at least two of said curl regulation devices in view of achieving a regulation of the curl in a number of stages, and/or said curl regulation devices have been fitted to operate in an area in which the web temperature is lower than 85 DEG C, preferably lower than 75 DEG C, and/or the dry solids content of the web is in a range of K1...K2, wherein K1 = ultimate dry solids content - 7 % and K2 = ultimate dry solids content + 3 %.
IPC 1-7
IPC 8 full level
D21F 5/00 (2006.01); D21F 5/04 (2006.01); D21F 5/08 (2006.01); D21G 7/00 (2006.01)
CPC (source: EP)
Designated contracting state (EPC)
AT DE ES FR GB IT SE
DOCDB simple family (publication)
WO 9844191 A1 19981008; AT E329082 T1 20060615; AU 6502198 A 19981022; BR 9808431 A 20000523; CA 2284053 A1 19981008; CA 2284053 C 20051122; CN 1101499 C 20030212; CN 1251629 A 20000426; DE 69834820 D1 20060720; DE 69834820 T2 20061109; EP 1012383 A1 20000628; EP 1012383 B1 20060607; FI 971301 A0 19970327; FI 971301 A 19980928; JP 2001503484 A 20010313; JP 3660360 B2 20050615
DOCDB simple family (application)
FI 9800253 W 19980323; AT 98910766 T 19980323; AU 6502198 A 19980323; BR 9808431 A 19980323; CA 2284053 A 19980323; CN 98803774 A 19980323; DE 69834820 T 19980323; EP 98910766 A 19980323; FI 971301 A 19970327; JP 54118598 A 19980323