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Browse Prior Art Database

SENSOR CLEANER

IP.com Disclosure Number: IPCOM000024111D
Original Publication Date: 1979-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 156K

Publishing Venue

Xerox Disclosure Journal

Abstract

A light source disposed on one side of a transparent glass plate transmits rays therethrough onto a developed test patch on a photoconductive surface. The light rays are reflected back through the glass plate to a photosensor positioned on the

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XEROX DISCLOSURE JOURNAL

SENSOR CLEANER Proposed Classification
D. J~.Weikel, ~r. U~SeCL 118/646

mt Cl. G03g 15/06

A light source disposed on one side of a transparent glass plate transmits rays therethrough onto a developed test patch on a photoconductive surface. The light rays are reflected back through the glass plate to a photosensor positioned on the same side of the glass plate as the light source. The electrical outpost signal from the photosensor is a measure of the density of the toner powder image developed on the photoconductive surface. When the density is beneath a predetermined level, additional toner particles are furnished to the developer mixture. Frequently, the glass plate is contaminated with particles. This produces an erroneous signal indicating that a higher density of toner powder image is deposited on the photoconductive surface than is truly present. In order to obviate the foregoing problem, a wiper blade is disposed adjacent the glass plate and is periodically actuated to clean particle contaminates therefrom.

Volume 4 Number 5 September/October 1979 581

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