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POSITIVE PIN CHARGING

IP.com Disclosure Number: IPCOM000025750D
Original Publication Date: 1987-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 91K

Publishing Venue

Xerox Disclosure Journal

Abstract

Pin array charging devices, having a sawtooth-shaped pin array coronode, have been determined to be very useful in the negative charging mode of operation for electrophotographic printing. In positive charging modes of operation, streaming or a mild form of arcing occurs readily, quickly leading to pin array damage. Additionally, pin tip erosion and corrosion occurs more rapidly in the positive charging mode of operation. However, the advantageous properties of pin array coronodes, including strength, and minimal ozone production, remain desirable properties, and suggest the use of such coronodes, even in positive charging modes. Additionally, in electrophotographic devices which use pin array charging devices in the negative charging mode of operation, part interchangeability is a desirable goal. Accordingly, if possible, a common pin array charging device should be used in as many charging operations as possible in an electrophotographic device.

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XEROX DISCLOSURE JOURNAL

POSITIVE PIN CHARGING

Joseph H. Lang Robert A. Gross

16

Proposed Classification

U.S. C1.355/14CH Int. Cl.GO3g 15/00

CHARGING DEVICE

I

PHOTORECEPTOR

1

Pin array charging devices, having a sawtooth-shaped pin array coronode, have been determined to be very useful in the negative charging mode of operation for electrophotographic printing. In positive charging modes of operation, streaming or a mild form of arcing occurs readily, quickly leading to pin array damage. Additionally, pin tip erosion and corrosion occurs more rapidly in the positive charging mode of operation. However, the advantageous properties of pin array coronodes, including strength, and minimal ozone production, remain desirable properties, and suggest the use of such coronodes, even in positive charging modes. Additionally, in electrophotographic devices which use pin array charging devices in the negative charging mode of operation, part interchangeability is a desirable goal. Accordingly, if possible, a common pin array charging device should be used in as many charging operations as possible in an electrophotographic device.

Volume 12 Number 5 September/October 1987 235

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POSITIVE PIN CHARGING (Cont'd)

In detack operations wherein a positive charge is applied to a document tacked to a negatively charged photoreceptor to facilitate removal, a pin array charging device comprising a sawtooth coronode 10 and...