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TONER USAGE QUANTIFICATION

IP.com Disclosure Number: IPCOM000026142D
Original Publication Date: 1990-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 47K

Publishing Venue

Xerox Disclosure Journal

Abstract

Toner usage in electrophotographic printing machines may be quantified by integrating the value given by a current sensing device to measure the charge on dispensed toner. The dispensed toner charge is proportional to given toner mass. The current sensing device is mounted on a developer housing in close proximity to the toner mass deposited on a photoreceptor. A controlled mass of toner is dispensed, the charge measured and the charge to mass ratio is stored in memory as a control reference. The charge to mass reference value is equated with the sum total of dispensed toner charge. When the theoretical limit of the toner dispenser is approached a signal alerts an operator to refill the dispenser. A related scheme may be used to monitor waste toner receptacles.

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XEROX DISCLOSURE JOURNAL

TONER .USAGE QUANTIFICATION Proposed Classification Christian 0. Abreu U.S. C1.335/246 Michael A. Parisi Int. C1. GOlc 09/02

Toner usage in electrophotographic printing machines may be quantified by integrating the value given by a current sensing device to measure the charge on dispensed toner. The dispensed toner charge is proportional to given toner mass. The current sensing device is mounted on a developer housing in close proximity to the toner mass deposited on a photoreceptor. A controlled mass of toner is dispensed, the charge measured and the charge to mass ratio is stored in memory as a control reference. The charge to mass reference value is equated with the sum total of dispensed toner charge. When the theoretical limit of the toner dispenser is approached a signal alerts an operator to refill the dispenser. A related scheme may be used to monitor waste toner receptacles.

XEROX DISCLOSURE JOURNAL - Vol. 15, No. 4 July/August 1990 207

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208 XEROX DISCLOSURE JOURNAL - Vol. 15, No. 4 JulyIAugust 1990

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