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COROTRON CURRENT DISTRIBUTION TUNING VIA SHIELD AREA

IP.com Disclosure Number: IPCOM000025162D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 56K

Publishing Venue

Xerox Disclosure Journal

Abstract

The control corona generating device for use in electrostatographic copiers usually comprises an elongated metallic channel member with three sides, a center rib, and an open end along which two corotron wires are extended. Generally, these devices are relatively long, for example, up to 16 inches, and have been found to produce less photoreceptor current at the ends than at the center. The resultant lower charge voltage produces non-uniform darkness within a copy.

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CEROX DISCLOSURE JOURNAL .

COROTRON CURRENT DISTRIBUTION Proposed Classification TUNING VIA SHIELD AREA
U.S. Steven Kolb Cl. 250/326
Int. CI. HOlt 19/04

Robert S. Pozniakas

The control corona generating device for use in electrostatographic copiers usually comprises an elongated metallic channel member with three sides, a center rib, and an open end along which two corotron wires are extended. Generally, these devices are relatively long, for example, up to 16 inches, and have been found to produce less photoreceptor current at the ends than at the center. The resultant lower charge voltage produces non-uniform darkness within a copy.

The illustrated modification proposes to reduce the shield area of the center rib in the low charge ends to increase the ratio of photoreceptor current to shield current. This technique can be used to produce constant current along the corona generating device.

As shown, the rib is cut away to the general shape as shown.

Volume 8 Number 6 November/December 1983 469

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470

    XEROX DISCLOSURE JOURNAL
Volume 8 Number 6 November/December 1983

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