Long nip press roll

Details Long nip press roll Long nip press roll

D - Textiles, Paper

21

F

92/15.3

D21F 3/02 (2006.01) D21F 3/04 (2006.01)

Patent

CA 1319553

LONG NIP PRESS ROLL ABSTRACT OF THE DISCLOSURE 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 radi- ally movable hydraulically operated press shoe. A flexible tubular press shell is wrapped around the sup- port beam and the press shoe. The concave outer sur- face 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 in- side the press shell and/or a removal roll at the out- side of the press shell separate the web from the out- side of the press shell. Plural press shoes defining plural press nips may be provided.

591905

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