Global Patent Index - EP 0967323 A3

EP 0967323 A3 2000-01-05 - Twin-wire former

Title (en)

Twin-wire former

Title (de)

Doppelsiebformer

Title (fr)

Section de formage à deux toiles

Publication

EP 0967323 A3 (DE)

Application

EP 99101848 A

Priority

DE 19828237 A

Abstract (en)

[origin: EP0967323A2] The double-fourdrinier section of a papermaking machine, has a lateral support bar (9) which applies an underpressure to the outer fourdrinier (11). The support bar (9) has a sliding surface (9a) in contact with the outer fourdrinier (11), followed by a foil surface (9b) in the direction of fourdrinier travel, which diverges from the fourdrinier surface to create an underpressure. The sliding surface (9a) is pressed against the outer fourdrinier (11) with a pliable pressure. As seen in cross section through the bar (9), the downstream section is supported by a swivel (7), while the upstream zone is held by a pliable setting unit such as a pneumatic hose (6). The gap can be varied between the swivel (7) and the outer fourdrinier (11), and the angle between the foil surface (9b) and the outer fourdrinier (11) can be set to give the required level of underpressure. The position of the support system can be varied parallel to the direction of fourdrinier travel, as a support shoe or suction box and the like which is pressed pliably against the outer fourdrinier. The support unit (9) is in the loop of the lower fourdrinier (11) and the roller (14) to form the wet pulp web within the loop of the upper fourdrinier (12). The two fourdriniers (11,12) can run upwards, from below, between the web forming roller (14) and the support (9), or downwards from above.

IPC 1-7

D21F 9/00

IPC 8 full level

D21F 9/00 (2006.01)

CPC

D21F 9/003 (2013.01)

Citation (search report)

DCS

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0967323 A2 19991229; EP 0967323 A3 20000105; EP 0967323 B1 20030102; AT 230454 T 20030115; DE 19828237 A1 19991230; US 6254727 B1 20010703