Combined charge/recharge xerographic power supply
AssigneeXerox Corporation
InventorsJerry F. Adams, Peter G. Fournia
Life of this patent
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Abstract
A combined charge/recharge xerographic power supply is provided that utilizes one power supply to drive the charge pin scorotron and recharge discorotron grids of a electrophotographic or xerographic system. The power supply uses recycled power from the pin scorotron grid to drive the discorotron grid. In particular, the power supply uses power that is dissipated in the traditional shunt regulator attached to the pin scorotron grid terminal to drive and provide active current to the discorotron grid through a series-pass regulation circuit. Thereby providing reduced electromagnetic emissions and reduced unit manufacturing costs.
Claims20
An image forming apparatus comprising:
- a photoreceptor;
- and
- at least one charging unit that charges and recharges the photoreceptor to produce a uniform charge on the photoreceptor, comprising:
- a pin scorotron device that charges the photoreceptor, and
- a discorotron device that recharges the charged photoreceptor, wherein a voltage from a grid of the pin scorotron device is recycled to drive a grid of the discorotron device.
A charging unit that charges and recharges a photoreceptor to produce a uniform charge on the photoreceptor, comprising:
- a pin scorotron device that charges the photoreceptor, and
- a discorotron device that recharges the charged photoreceptor, wherein a voltage from a grid of the pin scorotron device is recycled to drive a grid of the discorotron device.
Dependencies are inferred from the claim text.