Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1996-01-31
1997-07-22
Czaja, Donald E.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162361, 496 7, 496 20, D21F 306
Patent
active
056500483
ABSTRACT:
An extended nip press has a shoe driven by two pistons to engage a blanket-supported web against a crown controlled roll. Each ENP shoe piston is offset from the line of force application of the crown control piston by a moment arm distance. A balancing of the hydraulic pressures in the ENP shoe cylinders and the crown control cylinder is achieved by two equalizer valves. Each valve has a slidable spool with faces of a selected cross-sectional area to respond to hydraulic fluid from the various cylinders to retain the correct proportion between the forces applied by the ENP shoe pistons and the crown control piston.
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Archer David J.
Beloit Technologies Inc.
Campbell Raymond W.
Czaja Donald E.
Fortuna Jos'e A.
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