Apparatus for forming an extended nip

Details Apparatus for forming an extended nip Apparatus for forming an extended nip

2006-11-07

2006-11-07

Hug, Eric (Department: 1731)

Paper making and fiber liberation

Apparatus

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

C100S118000, C100S153000, C162S272000

Reexamination Certificate

active

07132037

ABSTRACT:
Apparatus for forming an extended nip between a mating roll and a shoe roll for treating a product web, the shoe roll having a stationary carrier and a flexible roll shell which can rotate around the carrier and which, in the region of the extended nip, is supported on a hydrodynamically lubricated running surface of a press shoe guided on the carrier, for which purpose a device for applying lubricant to the inner side of the roll shell is provided, where, in an inlet region, the press shoe has a plurality of holes which are arranged transversely with respect to the machine running direction, are connected to a lubricant supply in order to be fed with lubricant and, for this purpose, end at the running surface, and the holes comprise restrictors whose resistance is designed for a pressure drop of 5 to 15 bar.

REFERENCES:
patent: 4917768 (1990-04-01), Ilmarinen
patent: 5084137 (1992-01-01), Ilmarinen et al.
patent: 5262011 (1993-11-01), Ilmarinen
patent: 5843283 (1998-12-01), Henssler et al.
patent: 2003/0145971 (2003-08-01), Watanabe
patent: 2004/0069433 (2004-04-01), Rajamaki
patent: 4311622 (1994-10-01), None
patent: 297 01 922 (1997-05-01), None

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