Browse Prior Art Database

TONER CONTROL SENSOR FOR NON-REFLECTIVE PHOTORECEPTORS

IP.com Disclosure Number: IPCOM000027524D
Original Publication Date: 1997-Aug-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 70K

Publishing Venue

Xerox Disclosure Journal

Abstract

Typically a reflective type photosensor which detects a toner image density formed on a reflective photoreceptor by irradiating a light and measuring the intensity of the reflected light has been used as toner concentration control sensors. However, a recent variety of the new photoreceptors is presented - photoreceptors transparent to incident light

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XEROX DISCLOSURE JOURNAL

TONER CONTROL SENSOR FOR NON-REFLECTIVE PHOTORECEPTORS Daniel R. Maurer

Proposed Classification
U. S. C1. 3991049 Int. C1. G03g 15/00

Typically a reflective type photosensor which detects a toner image density formed on a reflective photoreceptor by irradiating a light and measuring the intensity of the reflected light has been used as toner concentration control sensors. However, a recent variety of the new photoreceptors is presented - photoreceptors transparent to incident light

XEROX DISCLOSURE JOURNAL - Vol. 22, NO. 4 JulylAugust 1997 175

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TONER CONTROL SENSOR FOR NON-REFLECTIVE PHOTORECEPTORS (CONT'D)

sufficiently to disable the detection of reflected light. For example, a photoreceptor having hydroxygallium phthalocyanine pigment and a transparent substrate such as polyethylene terephthate film has great transparency to the incident light.

A new toner control sensor for non-reflective photoreceptors is proposed in this disclosure. As indicated in the figure, the control sensor comprises light emitter 1 and light detector 2 facing each other and having a photoreceptor 4 therebetween. The toner mass patch 3 is formed onto the surface of the photoreceptor 4 by a standard procedure using image forming devices (not shown). Light emitted from the light emitter passes through the photoreceptor 4 and the developed standard patch 3, then the transmitted light is detected by...