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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

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.