DC pin scorotron charging apparatus, and printing machine arranged with the same

US6459873B1 · kind B1 · utility

Assignee

• Xerox Corporation · US

Inventors

• Jing Song · Lo Wu, CN
• John F. Obrien · Fairport, US
• David Sekovski · Rochester, US
• Robert K. Fox · Fairport, US
• John D. McCaffrey · Rochester, US
• Jeffrey W. Drawe · New York, US

Key dates

• Filing date: Nov 15, 2000
• Grant date: Oct 1, 2002
• Expiry date: Dec 1, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G2215/028
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In DC pin scorotron charging apparatus for charging a photoreceptor to a final voltage, a first DC pin scorotron charging device initially charges the photoreceptor to an intermediate overshoot voltage and a second DC pin scorotron charging device thereafter uniformly charges the photoreceptor to the final voltage. The first DC pin scorotron charging device provides a generally high percent open control grid area, a generally high emitter slope, and a generally high emitter pin current. The second DC pin scorotron charging device provides a generally low percent open control grid area, a generally low emitter slope, and a generally low emitter pin current.