Browse Prior Art Database

CORRUGATED SCOROTRON SCREENS

IP.com Disclosure Number: IPCOM000026531D
Original Publication Date: 1992-Aug-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 90K

Publishing Venue

Xerox Disclosure Journal

Abstract

Scorotrons are commonly used as a primary charging device in xerographic printing machines due to their ability to consistently charge a receptor uniformly. A beneficial quality of scorotrons is their use of a screen to provide automatic feedback to shut off ions. For machines requiring longer and/or wider scorotrons, problems may arise concerning maintenance of screen flatness, in or orthogonal to a process direction. Without flatness control arcing possibilities and non-uniform charging may result. Disclosed is a corrugated screen with improved overall mechanical strength and flatness.

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XEROX DISCLOSURE JOURNAL

CORRUGATED SCOROTRON SCREENS
Richard F. Bergen
Alan B. Amidon

Proposed Classification
U.S. C1.3551219 Int. C1. G03g 15/02

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XEROX DISCLOSURE JOURNAL - Vol. 17, So. 4 July/August 1992 239

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CORRUGATED SCOROTRON SCREENS (Cont'd)

Scorotrons are commonly used as a primary charging device in xerographic printing machines due to their ability to consistently charge a receptor uniformly. A beneficial quality of scorotrons is their use of a screen to provide automatic feedback to shut off ions. For machines requiring longer and/or wider scorotrons, problems may arise concerning maintenance of screen flatness, in or orthogonal to a process direction. Without flatness control arcing possibilities and non-uniform charging may result. Disclosed is a corrugated screen with improved overall mechanical strength and flatness.

Figure 1A shows a cross-section of a typical potential well scorotron, with a flat screen 30, coronode wires 10 and ions 20. Figure 1B shows a cross-section of a potential well scorotron with a corrugated screen 40. The corrugations 50 of screen 40 run orthogonal to a process direction. Added strength and rigidity from the corrugations help maintain flatness for long and/or wide screen...