Sheet feeding or delivering – Feeding – With means to align sheet
Reexamination Certificate
2006-07-17
2009-12-08
Mackey, Patrick H (Department: 3653)
Sheet feeding or delivering
Feeding
With means to align sheet
Reexamination Certificate
active
07628398
ABSTRACT:
A method and system for performing sheet registration are disclosed. Output values for a sheet may be identified within a reference frame. A difference between each output value and a corresponding desired output value may be determined. Input values may be determined based on at least the differences. State feedback values may be determined based on information received from one or more sensors. Acceleration values may be determined for multiple drive rolls based on the input values and the state feedback values. A desired angular velocity for each drive roll may be determined based on the corresponding acceleration value. A motor voltage may be determined for each drive roll that tracks an observed angular velocity value to the desired angular velocity value. The acceleration values may create a linear differential relationship between the input values and the output values. The steps may be performed multiple times.
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Mackey Patrick H
McCullough Michael C
Pepper Hamilton LLP
Xerox Corporation
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