Long nip press roll arrangement

Details Long nip press roll arrangement Long nip press roll arrangement

1989-03-02

1990-05-08

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162205, 1623601, D21F 302

Patent

active

049235702

ABSTRACT:
A long nip press roll for removing water from a traveling fiber web. A rigid support beam has at least one recess in its periphery for receiving a radially movable hydraulically operated press shoe. A flexible tubular press shell is wrapped around the support beam and the press shoe. The concave outer surface of the press shoe presses the press shell against a backing roll for pressing upon a fiber web against a felt belt passing through the nip. The press shell has a smooth outer surface in contact with the web. At its outlet side from the press nip, the press shoe has a convexly curved guide surface over which the press shell and the paper web travel together and that guide surface is also wrapped for a distance by the felt belt. This separates the web from the felt belt and the web travels around on the press shell. A ledge inside the press shell and/or a removal roll at the outside of the press shell separate the web from the outside of the press shell. Plural press shoes defining plural press nips may be provided.

REFERENCES:
patent: 4086131 (1978-04-01), Rempel et al.
patent: 4201624 (1980-05-01), Mohr et al.
patent: 4503765 (1985-03-01), Schiel
patent: 4518460 (1985-05-01), Hauser et al.
patent: 4552620 (1985-11-01), Adams
patent: 4555305 (1985-11-01), Steiner et al.
patent: 4570314 (1986-02-01), Holik et al.
patent: 4625376 (1986-12-01), Schiel et al.
patent: 4673461 (1987-06-01), Roerig et al.

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