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LOW VOLTAGE WITH ELECTROGRAPHY BY CHARGE TRANSFER WITH INDUCTION

IP.com Disclosure Number: IPCOM000025295D
Original Publication Date: 1984-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 59K

Publishing Venue

Xerox Disclosure Journal

Abstract

Electrography using low voltage stylus writing in which charge is transferred from a stylus in contact with an electroreceptor to conducting dots on the electro-receptor has recently been demonstrated. While this process has the advantage of requiring reduced voltage in the electrical pulse supply system, it has the disadvantage of wear on critical electrical contact areas. The figure illustrates an alternative embodiment in which the electroreceptor is a photoconducting layer without dots and charge transfer is done by induction. In the figure a photocon-ductor 10 having a grounded conductive, transparent substrate 12 is moved relative to a slit of light 14. As the photoconducting layer is exposed in a narrow strip, the stylus is lightly drawn across the photoconductor surface. The conductive stylus which is pulsed with a low voltage (under 360 volts) in image configuration is sufficiently close to the photoconducting layer to create a sufficient field that charge within the photoconductor is rearranged or induced and trapped in the rearranged configuration when the stylus is moved. The electrostatic latent image which comprises a pattern of charge dots may be developed and processed in conventional manner.

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XEROX DISCLOSURE JOURNAL

LOW VOLTAGE WITH ELECTROGRAPHY BY CHARGE TRANSFER WITH INDUCTION William L. Goffe

Proposed Classification
U.S. CI. 358/300 Int. C1. H04n 1/30

14 /

Electrography using low voltage stylus writing in which charge is transferred from a stylus in contact with an electroreceptor to conducting dots on the electro- receptor has recently been demonstrated. While this process has the advantage of requiring reduced voltage in the electrical pulse supply system, it has the disadvantage of wear on critical electrical contact areas. The figure illustrates an alternative embodiment in which the electroreceptor is a photoconducting layer without dots and charge transfer is done by induction. In the figure a photocon- ductor 10 having a grounded conductive, transparent substrate 12 is moved relative to a slit of light 14. As the photoconducting layer is exposed in a narrow strip, the stylus is lightly drawn across the photoconductor surface. The conductive stylus which is pulsed with a low voltage (under 360 volts) in image configuration is sufficiently close to the photoconducting layer to create a sufficient field that charge within the photoconductor is rearranged or induced and trapped in the rearranged configuration when the stylus is moved. The electrostatic latent image which comprises a pattern of charge dots may be developed and processed in conventional manner.

Volume 9 Number 3 May/June 1984 223

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