EP 0567484 B1 19970723 - METHOD AND DEVICE IN THE PRESS SECTION OF A PAPER MACHINE FOR DETACHING THE WEB FROM THE FACE OF A PRESS ROLL
Title (en)
METHOD AND DEVICE IN THE PRESS SECTION OF A PAPER MACHINE FOR DETACHING THE WEB FROM THE FACE OF A PRESS ROLL
Title (de)
VERFAHREN UND VORRICHTUNG IN DER PRESSPARTIE EINER PAPIERMASCHINE ZUM LÖSEN DER BAHN VON EINER PRESSWALZENOBERFLÄCHE
Title (fr)
PROCEDE ET DISPOSITIF RELATIFS A LA PRESSE D'UNE MACHINE A PAPIER ET SERVANT A DETACHER LA BANDE DE LA FACE D'UN CYLINDRE DE PRESSION
Publication
Application
Priority
- FI 9200014 W 19920120
- FI 910288 A 19910118
Abstract (en)
[origin: WO9213133A1] Method and device in the press section of a paper machine for detaching the web (W) from a smooth mantle face (18') of a press roll (18). In the method and in the device, a transfer zone (40a; 50a) is employed, over which a press fabric (23) or a particular transfer fabric (44) is passed so as to accomplish a closed draw of the web (W). The transfer zone (40a, 50a) as well as said fabric (23; 44) form a transfer nip (NS) or a transfer zone with the roll face (18'). At the transfer point, the temperature level (T) of the roll face (18') and/or of the web (W) is set or regulated so high that the pressure (pS) of saturated vapour of the water present in connection with the web (W) and with the roll face (18') which corresponds to said temperature level (T) is substantially equally high as, or just little higher than, the pressure (pO) that has been set to prevail in said transfer zone (40a, 50a), said pressure (pO) being preferably lower than the atmospheric pressure.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21F 3/0281 (2013.01); D21F 3/04 (2013.01)
Designated contracting state (EPC)
AT DE FR GB IT SE
DOCDB simple family (publication)
WO 9213133 A1 19920806; AT E155837 T1 19970815; CA 2099379 A1 19920719; CA 2099379 C 20000425; DE 69221123 D1 19970828; DE 69221123 T2 19971120; EP 0567484 A1 19931103; EP 0567484 B1 19970723; FI 910288 A0 19910118; FI 910288 A 19920719; FI 92941 B 19941014; FI 92941 C 19950125
DOCDB simple family (application)
FI 9200014 W 19920120; AT 92902194 T 19920120; CA 2099379 A 19920120; DE 69221123 T 19920120; EP 92902194 A 19920120; FI 910288 A 19910118