Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1997-08-08
1999-04-27
Hastings, Karen M.
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
1623583, 162361, D21F 306
Patent
active
058977473
ABSTRACT:
An extended nip press having a concave shoe which is supported on a hydraulic actuator which urges the shoe against a backing roll. A pair of opposed profile control hydraulic actuators apply a pure couple about the load support line formed by a bearing pin which transmits the support load from the hydraulic actuator to the shoe. A leading hydraulic actuator is positioned in front of the load support line and pulls down on the shoe. A trailing hydraulic actuator is positioned behind the load support line and pushes up on the shoe. The leading hydraulic actuator and trailing hydraulic actuator are equally spaced from the load support line and have equal hydraulic actuator area and are connected to the same hydraulic reservoir. Thus the hydraulic actuators exactly balance each other out except for the couple or torque which they apply about the load support line.
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"The Relative Importance of Wet Press Variables in Water Removal", L. R. Bueker and D.C. Cronin, Rockton Research & Development Lab, Beloit Corporation, Rockton, Illinois, 1982.
Beloit Technologies Inc.
Campbell Raymond W.
Hastings Karen M.
Mathews Gerald A.
LandOfFree
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