Method and apparatus using a biased transfer roll as a dynamic electrostatic voltmeter for system diagnostics and closed loop process controls
AssigneeXerox Corporation
InventorsChristopher A. DiRubio, Charles A. Radulski, Alexander J. Fioravanti
Life of this patent
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Abstract
A system and method for controlling a xerographic printer includes a subsystem for carrying out a function of the xerographic printer and affecting an electric field of a component. The system and method further include a bias transfer roll voltage operated in a constant current mode, and a voltage evaluator coupled to the biased transfer roll for measuring a change in a level of voltage of the bias transfer roll as the component affected by the subsystem passes through a nip region near the bias transfer roll for determining operability of the subsystem.
Claims20
A system for controlling a xerographic printer having a subsystem for carrying out a function of the xerographic printer, comprising:
- a subsystem for carrying out a function of the xerographic printer and affecting an electric field generated by a component;
- a bias transfer roll operated in a constant current mode;
- a voltage evaluator coupled to the biased transfer roll for measuring a change in a level of voltage of the bias transfer roll as the component affected by the subsystem passes through a nip region near the bias transfer roll for determining operability of the subsystem.
A method of controlling a xerographic printer, comprising the steps of:
- maintaining a biased transfer roll in a constant current mode;
- and
- measuring a change in a level of voltage of the bias transfer roll as a component affected by a subsystem carrying out a function of the xerographic printer passes through a nip region near the bias transfer roll for determining operability of the subsystem.
A method of controlling a xerographic printer, comprising the steps of:
- maintaining a biased transfer roll in a constant voltage mode;
- and
- measuring a change in a level of current applied to the bias transfer roll as a component affected by a subsystem carrying out a function of the xerographic printer passes through a nip region near the bias transfer roll for determining operability of the subsystem.
Dependencies are inferred from the claim text.