Intelligent gap control for improved paper machine profile contr

Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing

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162263, 162344, 162346, 162347, 118671, 118672, 118712, 425145, 425150, 425171, 425466, D21F 1100

Patent

active

061066710

ABSTRACT:
Apparatus and method for controlling the size of a gap through which material is metered. The gap is defined by a rigid surface and a flexible surface connected to at least one actuator for deforming the flexible surface. A plurality of sensors are positioned along the rigid or flexible surfaces to detect the other of the surfaces and generate signals indicating its position. A computing unit in communication with the plurality of sensors processes the signals to generate a continuous gap measurement profile. The computing system also stores a pre-determined desired gap measurement profile. A control system in communication with the computing unit actuates the actuators to deform the flexible surface to adjust the gap measurement profile to correct any deviation from the desired gap measurement profile.

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Recent Experiences with Consistency Profile Control Installations--Mike Heaven; Robert Vyse; Tom Steele and Claud Hagart-Alexander--Presented at the CPPA Technical Section Pacific and Western Branch Joint Conference, Whistler, Canada May 1997 pp. 1-10).

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