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ELECTRICAL DEFECT SCANNER FOR PHOTORECEPTORS

IP.com Disclosure Number: IPCOM000025897D
Original Publication Date: 1988-Dec-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

US-A 4,204,725 to Distefano et al. discloses an arrangement for detecting and ultimately printing a latent electrostatic image detected on a photoreceptor in an electrophotographic device. Generally, a photoreceptor surface bearing an undeveloped latent image is interrogated with a laser. Upon interrogation of a charged area on the photoreceptor by the laser, an electrical discharge is produced. The discharge may be detected by a detector capacitively coupled to the photoreceptor. Knowing the position of the laser at the time when a discharge is detected enables the construction of a digital image corresponding to charged and uncharged areas of the photoreceptor. The constructed digital image may then be directed to a printer.