Browse Prior Art Database

PIVOTABLY MOUNTED CORONA GENERATING DEVICE

IP.com Disclosure Number: IPCOM000027171D
Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 110K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is well known that various nitrogen oxide species are produced by corona generating devices typically used in electrostatographic printing applications. Such nitrogen oxide species are generally adsorbed by solid surfaces adjacent the corona. Moreover, it has been found that the adsorption of these nitrogen oxide species can be a physically reversible process such that the adsorbed nitrogen oxide species are gradually desorbed when a machine is turned off for an extended period of idleness. When the operation of the machine is resumed, a copy quality defect, commonly called a parking deletion, is observed wherein a line image deletion of lower density image is formed across the width of the photoreceptor at that portion of its surface which was opposite the corona generating device during the period of idleness. It has been observed that, even after a relatively short period of operation, i.e. 15 minutes, followed by a period of idleness of, say, several hours, a mild line defect and a coincident image deletion may occur.

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XEROX DISCLOSURE JOURNAL

PIVOTABLY MOUNTED CORONA Proposed Classification GENERATING DEVICE US. C1.355/221 Susan J. Zoltner Int. C1. G03g 15/02

FIG. I

FIG. 2

22

24

FIG. 3

XEROX DISCLOSURE JOURNAL - Vol. 20, NO. 4 JuIy/AugUSt 1995 31'7

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PIVOTABLY MOUNTED CORONA GENERATING DEVICE (Cont'd)

It is well known that various nitrogen oxide species are produced by corona generating devices typically used in electrostatographic printing applications. Such nitrogen oxide species are generally adsorbed by solid surfaces adjacent the corona. Moreover, it has been found that the adsorption of these nitrogen oxide species can be a physically reversible process such that the adsorbed nitrogen oxide species are gradually desorbed when a machine is turned off for an extended period of idleness. When the operation of the machine is resumed, a copy quality defect, commonly called a parking deletion, is observed wherein a line image deletion of lower density image is formed across the width of the photoreceptor at that portion of its surface which was opposite the corona generating device during the period of idleness. It has been observed that, even after a relatively short period of operation, i.e. 15 minutes, followed by a period of idleness of, say, several hours, a mild line defect and a coincident image deletion may occur.

The present disclosure addresses the problems associated with parking deletions by providing a corona generating device which is pivotably mounted such that the corona generating device can be rotated away from the photoreceptor surface during a period of idleness. As can be seen from accompanying FIG. 1, the corona generating device 20 can be mounted along a pivot axis 22...