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AN INTEGRAL GENERATING CORONA POWER SUPPLY

IP.com Disclosure Number: IPCOM000024708D
Original Publication Date: 1981-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 65K

Publishing Venue

Xerox Disclosure Journal

Abstract

In electrophotographic recording systems, corona devices are widely used to perform a variety of charging functions. The economic and energy costs of the high voltage power supplies needed to energize such corona devices adversely impacts efforts to develop commercially feasible small copiers. Savings in both cost and associated hardware complexity can be realized by providing an electro-magnetic corona power generator which is an integral part of the corona device itself.

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XEROX DISCLOSURE JOURNAL

AN INTEGRAL GENERATING CORONA POWER SUPPLY U.S. Cl. 355/3CH Jesse Zeck

Proposed Classification

Int. CI. G03g 15/00

r2,

,

In electrophotographic recording systems, corona devices are widely used to perform a variety of charging functions. The economic and energy costs of the high voltage power supplies needed to energize such corona devices adversely impacts efforts to develop commercially feasible small copiers. Savings in both cost and associated hardware complexity can be realized by providing an electro- magnetic corona power generator which is an integral part of the corona device itself.

The figure illustrates an embodiment of an integral generating corona power supply in which a corona wire 10 is shown positioned adjacent a photoreceptor drum 20. A disc 30 is mounted on an extension 22 of the axle of the drum for complementary rotation therewith. A plurality of permanent magnets 32 are mounted in a circumferential pattern about the inner face of the discs 30. When rotated with the drum, magnets 32 create a changing magnetic flux which induces a current in coil 12 which is mounted upon a portion of the frame for the corona device. The induced alternating current energizes corona wire 10 to create the desired discharge. Although not shown, either magnetic or semiconductor registration or control could be used for AC or DC. As well, mechanical or semiconductor rectification could be employed for DC operation.

Volume 6 Number 5 Septembe...