Extended nip press for a paper machine

Details Extended nip press for a paper machine Extended nip press for a paper machine

1983-06-06

1984-11-27

Smith, William

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

29113AD, 29113R, 100170, 100211, 162361, D21F 308

Patent

active

044849826

ABSTRACT:
An extended nip press for a paper machine for removing water from a wet fibrous or porous web. The press comprises two parallel, rotating press rolls which are pressed against each other and form therebetween a press nip through which a web to be dried passes together with at least one drier felt. At least one of the press rolls is provided with a hard support cylinder and a flexibly compressible shell layer surrounding said cylinder so that the press nip forms an extended press zone. In order to equalize the pressure and the temperature in the press zone, the shell layer is provided with a flexible layer formed by at least one liquid-filled cavity and a gas-filled cell disposed in the cavity, said flexible layer surrounding the support cylinder at least corresponding to the width of the web.

REFERENCES:
patent: 3082683 (1963-03-01), Justus
patent: 3098284 (1963-07-01), Hornbostel
patent: 3293121 (1966-12-01), Martin
patent: 3470948 (1969-10-01), Korsch
patent: 3804707 (1974-04-01), Mohr et al.

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