Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1989-06-23
1990-11-27
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162358, 100 93RP, D21F 300
Patent
active
049733842
ABSTRACT:
A heated extended nip press apparatus is disclosed for pressing water from a formed web. The apparatus includes a frame and a backing roll rotatably supported by the press frame. A press device is connected to the press frame and movable relative to the backing roll. The press device cooperates with the backing roll for defining therebetween an extended nip for the passage therethrough of the web. An endless looped blanket extends through the extended nip such that the web is disposed between the blanket and the backing roll. Additionally, the press device includes an arrangement for selectively changing the pressure applied on the blanket along a machine direction relative to a further pressure applied for moving the press device relative to the backing roll such that optimum web properties are obtained and delamination of the pressed web is inhibited. Cross-machine direction recesses in the press shoe enable the shoe to be selectively positioned in the machine direction.
REFERENCES:
patent: 4287021 (1981-09-01), Justus et al.
patent: 4568423 (1986-02-01), Laapotti
patent: 4570314 (1986-02-01), Holik
patent: 4576682 (1986-03-01), Laapotti
patent: 4713147 (1987-12-01), Saarinen
patent: 4738752 (1988-04-01), Busker et al.
Crouse Jere W.
Porter Roy J.
Pulkowski Jeffrey H.
Archer David J.
Beloit Corporation
Campbell Raymond W.
Hastings Karen M.
Veneman Dirk J.
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