EP 0770727 A1 19970502 - Method and device for dewatering of a paper web by pressing
Title (en)
Method and device for dewatering of a paper web by pressing
Title (de)
Verfahren und Vorrichtung zur Entwässerung einer Papierbahn durch Pressen
Title (fr)
Procédure et dispositif pour drainage d'une bande de papier par pressage
Publication
Application
Priority
- EP 91850291 A 19911122
- FI 905798 A 19901123
Abstract (en)
Method and device in the manufacture of paper or board for dewatering of the paper web (W) that is being manufactured. The paper web (W) is transferred from the forming wire (10) onto the wire (80) in the drying section while constantly on support of a fabric that receives water, a transfer febric, or of any other, corresponding transfer surface (105') as a closed draw, at a particularly high speed, which is, as a rule, higher than about 25...30 m/s. Dewatering of the paper web (W) is carried out by means of two subsequent extended press nips (NP1, NP2), whose length (z) in the machine direction is larger than z > about 100 mm. After the first extended press nip (NP1), through which the web is passed between two fabrics (20, 30) the web is transferred by means of a suction roll (40) to a single upper fabric (40) passing through the second extended nip (NP2), which has a smooth faced counter roll (105) in a lower position. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21F 3/0218 (2013.01); D21F 3/04 (2013.01); D21F 3/045 (2013.01)
Citation (applicant)
- US 4483745 A 19841120 - WICKS LAURIE D [US], et al
- US 4526655 A 19850702 - KARVINEN MIKKO [FI], et al
- US 4561939 A 19851231 - JUSTUS EDGAR J [US]
- WO 8500841 A1 19850228 - VOITH GMBH J M [DE]
- DE 3742848 A1 19890629 - ESCHER WYSS GMBH [DE]
- US 4584059 A 19860422 - SCHIEL CHRISTIAN [DE], et al
Citation (search report)
[A] US 4915790 A 19900410 - DAHL HANS [DE]
Designated contracting state (EPC)
AT DE FR GB IT SE
DOCDB simple family (publication)
EP 0487483 A1 19920527; EP 0487483 B1 19980715; AT E168423 T1 19980815; AT E218648 T1 20020615; CA 2055927 A1 19920524; CA 2055927 C 19990202; DE 69129788 D1 19980820; DE 69129788 T2 19981119; DE 69133030 D1 20020711; DE 69133030 T2 20021121; EP 0770727 A1 19970502; EP 0770727 B1 20020605; FI 905798 A0 19901123; FI 905798 A 19920524; FI 96789 B 19960515; FI 96789 C 19960826
DOCDB simple family (application)
EP 91850291 A 19911122; AT 91850291 T 19911122; AT 96120948 T 19911122; CA 2055927 A 19911120; DE 69129788 T 19911122; DE 69133030 T 19911122; EP 96120948 A 19911122; FI 905798 A 19901123