Extended nip press apparatus

Details Extended nip press apparatus Extended nip press apparatus

1998-03-26

1999-11-09

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

1623585, D21F 306

Patent

active

059806931

ABSTRACT:
An extended nip press apparatus is disclosed for pressing a web of paper extending therethrough. The apparatus includes a rotatable backing roll and a press shoe having a concave surface which cooperates with the backing roll. The arrangement is such that the concave surface and the backing roll define therebetween an elongated pressing section for the passage therethrough of the web. The shoe includes an upstream portion and a device for urging the upstream portion toward the backing roll. A downstream portion extends from the upstream portion, the downstream portion being resiliently disposed relative to the upstream portion. A further device selectively urges the downstream portion toward the backing roll for controlling a pressure profile applied by the shoe to the web for inhibiting delamination of the web.

REFERENCES:
patent: 3564631 (1971-02-01), Burling
patent: 3970515 (1976-07-01), Busker
patent: 4464226 (1984-08-01), Karvinen
patent: 4468287 (1984-08-01), Dahl
patent: 4506456 (1985-03-01), Lehtinen
patent: 4518460 (1985-05-01), Hauser et al.
patent: 5071513 (1991-12-01), Bluhm et al.
patent: 5645691 (1997-07-01), Zuefle et al.

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