EP 1096064 A2 20010502 - Process and apparatus for dewatering a fibrous web
Title (en)
Process and apparatus for dewatering a fibrous web
Title (de)
Verfahren und Vorrichtung zur Entwässerung einer Faserstoffbahn
Title (fr)
Procédé et dispositif pour la déshydratation d' une bande fibreuse
Publication
Application
Priority
DE 19951794 A 19991027
Abstract (en)
The station (10) for the extraction of water from a wet paper/cardboard web (12) has a water extraction zone (E), where the water is driven out at least partially by the effects of a displacement gas (14) under pressure. In the water extraction zone (E), the web (12) passes through a number of stages where it is subjected to a number of gas pressure pulses (141-144). Within the water extraction zone (E), a number of extraction stations (16,18,20,22) are at intervals on the web (12) path, where water is displaced from the web. The pressure level can be adjusted for at least one of the gas pulses (141-144), and their pressures can be set independently of each other. The web (12) moves through the water extraction zone (E) together with a membrane (26), which is pressed against the web by the pulsed pressure gas (14). A fourdrinier or blanket (24) is on the other side of the web (12). The gas pulses (141-142) are at different time frequencies. An Independent claim is included for a water extraction station (10) for a paper/cardboard web (12), where it is passed through a water extraction zone (E) with a number of spaced extraction units (16,18,20,22), in succession, with displacement gas pulses directed under pressure at the web (12).
Abstract (de)
Bei einem Verfahren und einer entsprechenden Vorrichtung zur Entwässerung einer Faserstoffbahn (12), insbesondere einer Papier- oder Kartonbahn, wird die Faserstoffbahn (12) durch eine Entwässerungszone (E) geführt, in der sie zumindest teilweise durch eine Beaufschlagung mit unter Druck stehendem Verdrängungsgas (14) entwässert wird. Dabei wird die Faserstoffbahn (12) innerhalb der Entwässerungszone (E) nacheinander durch mehrere Gasdruckimpulse (141 - 144) beaufschlagt. <IMAGE>
IPC 1-7
IPC 8 full level
D21F 1/48 (2006.01)
CPC (source: EP US)
D21F 1/48 (2013.01 - EP US)
Designated contracting state (EPC)
DE FI SE
DOCDB simple family (publication)
EP 1096064 A2 20010502; EP 1096064 A3 20020123; DE 19951794 A1 20010503; US 6475343 B1 20021105
DOCDB simple family (application)
EP 00120906 A 20000926; DE 19951794 A 19991027; US 69618100 A 20001026