Browse Prior Art Database

DRY-INK SENSOR

IP.com Disclosure Number: IPCOM000027780D
Original Publication Date: 1999-Aug-31
Included in the Prior Art Database: 2004-Apr-09
Document File: 2 page(s) / 84K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a dry ink clearing device that can be adapted to a toner/developer sensor imbedded in the material's flow path. Historically, dry-ink sensors of the piezoelectric variety comprise a high frequency, low amplitude vibrating surface that is easily dampened by the presence of a powder. A submerged sensor of this type is vulnerable to toner bridging across the sensing member causing a false dampened state or a failure to detect an exposed condition. Mechanical agitators added to the dispenser system for clearing the sensor are only marginally effective because of working tolerances that inhibit the delicate proximity required to clear the sensor. Moreover, the sensor may not

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XEROX DISCLOSURE JOURNAL

DRY-INK SENSOR

Proposed David B. Playfair Classification

U. S. C1.3991119 Int. C1. GO3g 15/04

Disclosed is a dry ink clearing device that can be adapted to a toner/developer sensor imbedded in the material's flow path. Historically, dry-ink sensors of the piezoelectric variety comprise a high frequency, low amplitude vibrating surface that is easily dampened by the presence of a powder. A submerged sensor of this type is vulnerable to toner bridging across the sensing member causing a false dampened state or a failure to detect an exposed condition. Mechanical agitators added to the dispenser system for clearing the sensor are only marginally effective because of working tolerances that inhibit the delicate proximity required to clear the sensor. Moreover, the sensor may not

XEROX DISCLOSURE JOURNAL - Vol. 24, NO. 4 July/August 1999 179

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DRY -INK SENSOR (Cont'd)

fall within the agitator's orbit due to design constraints. The use of mechanical "sensor thumping" requires excessively large amplitudes to overcome the shock characteristics of the dry ink and surrounding container thus, posing a threat to motion quality and reliability.

As shown in the accompanying figure, dry-ink sensor clearing device 10 comprises a plurality of extension or leaf springs 12 affixed at on end within close proximity of a detecting portion 14 of sensor 16. The opposite ends of springs 12 extend w...