Global Patent Index - EP 0740016 B1

EP 0740016 B1 2000-05-10 - Extended nip press roll for a paper machine

Title (en)

Extended nip press roll for a paper machine

Title (de)

Schuhpresswalze für eine Papiermaschine

Title (fr)

Rouleau de presse à pinçage élargi pour une machine à papier

Publication

EP 0740016 B1 (DE)

Application

EP 96101385 A

Priority

DE 19515832 A

Abstract (en)

[origin: DE19515832C1] A press shoe (16) for a paper machine shoe press is pressed against the opposing roll by one or more hydraulic elements (26) between a stationary support (24) and the inner surface of the shoe. The cylinder part (40) of the hydraulic element has a first pressurisable chamber (28) which communicates via an opening (32) with a second chamber (30) which is open to the press shoe and whose edges bear against a sealing surface (36) of the press shoe. The opening which connects the two chambers is in the form of a throttling point. Pref. the dimensions of the throttling orifice are such that, under normal operating conditions, the pressure in the two chambers is the same, but if the surface of the press shoe inclines at an angle to the surface of the piston, the pressure in the second chamber falls quickly and the leakage of the hydraulic fluid is minimised.

IPC 1-7 (main, further and additional classification)

D21F 3/02

IPC 8 full level (invention and additional information)

B30B 3/00 (2006.01); D21F 3/02 (2006.01); D21F 3/08 (2006.01)

CPC (invention and additional information)

D21F 3/0218 (2013.01)

Designated contracting state (EPC)

AT IT SE

DOCDB simple family

DE 19515832 C1 19960502; AT 192800 T 20000515; CA 2173890 A1 19961030; EP 0740016 A1 19961030; EP 0740016 B1 20000510; FI 113068 B 20040227; FI 960908 A0 19960227; FI 960908 A 19961030; JP H08302582 A 19961119; US 5688375 A 19971118