Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2005-02-15
2005-02-15
Von Buhr, Maria N. (Department: 2125)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C072S009200
Reexamination Certificate
active
06856855
ABSTRACT:
A method of controlling the thickness of sheets manufactured by the extrusion of a material from a die having a plurality of thickness adjusting means by repeating, at specified timings, the following steps of 1) measuring the distribution of thickness of the sheets in lateral direction, 2) evaluating a predicted future variation in sheet thickness by using a specified evaluation function and based on a process model representing a relation between the amount of operation and the sheet thickness and sheet thickness measured values and leading an operating amount time series to minimize the evaluation function, and 3) outputting at least the initial amount of operation of the led operating amount time series to the thickness adjusting means.
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Featherstone, Andrew P., et al.;Identification and Control of Sheet and Film Processes(Advances in Industrial Control); pp. 15-27, 129-144; 2000.
Hirata Hajime
Nakai Yasuhiro
Terao Jiro
Uehara Masatsugu
Kubovcik & Kubovcik
Toray Industries Inc.
Von Buhr Maria N.
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