Browse Prior Art Database

ILLUMINATION CONTROL INTEGRATOR

IP.com Disclosure Number: IPCOM000024962D
Original Publication Date: 1983-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 83K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a xerographic reproducing apparatus, a photoconductor surface is uniformly charged by a charging mechanisrn and is then exposed to a document to be reproduced. The exposure dissipates the charge in the exposed area thereby forming a latent electrostatic image of the document. Residual charge remaining on the photoconductive surface must then be erased, usually by exposure to a relatively bright light source.

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ILLUMINATION CONTROL INTEG Y AT0 K

Dale R. Troendle John A. Durbin

Proposed Classification
U.S. c1. 355!3 CH

Int. CI. G03g 15/00

4 6

In a xerographic reproducing apparatus, a photoconductor surface is uniformly charged by a charging mechanisrn and is then exposed to a document to be reproduced. The exposure dissipates the charge in the exposed area thereby forming a latent electrostatic image of the document. Residual charge remaining on the photoconductive surface must then be erased, usually by exposure to a relatively bright light source.

The figure illustrates an adjustable charge erase device 10 positioned adjacent the surface of a photoreceptor belt 12. Device 10 mrnprises an elongated light source 14 which can be a fluorescent lamp. The lamp is surrounded by semicircular reflector 16. Positioned below the lamp is a prism shaped integrating cavity 18 having its interior surface coated with a highly diffuse white paint. This cavity is designed to collect all the reflected light from lamp 14 and funnel or concentrate it, at a narrow portion of the surface of belt 12. Enclosed within the cavity 18 is an elongated light control valve 20. The valve is sirnilar to the choke mechanism in an automobile and functions in a similar manner. Maximum illumination reaches the photoreceptor when the valve is in the vertical position. If less erase energy is

Volume 8 Number 1 JanuarylFebruary 1983 43

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ILLUMI...