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Browse Prior Art Database

OUT OF TONER SENSOR

IP.com Disclosure Number: IPCOM000025181D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 77K

Publishing Venue

Xerox Disclosure Journal

Abstract

In an electrostatographic reproducing apparatus in use today, various schemes are used to determine whether the toner dispenser needs filling. The small compact machines sometimes rely on the operator making a judgment that toner is required in the dispenser if the copy is too light, and adjusting the toner addition rate to improve copy darkness. In machines equipt with toner dispensers including an auger, if the auger is not completely empty when the toner bottle is out of

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XEROX DISCLOSURE JOURNAL

OUT OF TONER SENSOR Oscar G. Hauser
Dale C. Thomas

Proposed Classification
U.S. C1. 355/3DD Int. C1. G03g 15/00

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In an electrostatographic reproducing apparatus in use today, various schemes are used to determine whether the toner dispenser needs filling. The small compact machines sometimes rely on the operator making a judgment that toner is required in the dispenser if the copy is too light, and adjusting the toner addition rate to improve copy darkness. In machines equipt with toner dispensers including an auger, if the auger is not completely empty when the toner bottle is out of

Volume 8 Number 6 November/December 1983 509

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[This page contains 1 picture or other non-text object]

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OUT OF TONER SENSOR (Cont'd)

toner, it can take several minutes before the dispense rate falls below normal. The figure illustrates a dispenser out of toner sensor which solves the above problem. The out of toner sensor comprises a lightweight mesh material 10 on the edge of which is a small magnet 12 attached to the mesh which rides along the inside wall of the toner dispenser 14 at a level close to the upper surface 16 of the toner inside the dispenser. On the outside of the dispenser wall a magnetic read switch 18 or a hall effect probe can be mounted at the desired level. Thus, as the toner level inside the dispenser drops to a predetermined position the switch is actuated providing the signal to add toner. When toner is added to the disp...