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OUT OF TONER SENSOR

IP.com Disclosure Number: IPCOM000022814D
Original Publication Date: 1976-Feb-29
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 221K

Publishing Venue

Xerox Disclosure Journal

Abstract

A system for sensing an out of toner condition in the toner supply for the development station of a xerographic repro~ ducing machine~ A toner supply 10 is arranged to cornmuni~ cate with the development system (not shown) by means of conduit 11 and dispensing roll 12, An acoustical wave generator 13 includes a tone generator 14 coupled to a suitable piezoelectric ceramic device 15, An acoustical wave detector system 16 comprises a piezoelectric sensor 17 coupled to a suitable display device such as an oscillo~ scope 18, In practice the display device would comprise a warning light actuated by suitable comparison circuitry coupled to the output of the sensor l7~

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

OUT OF TON~ER SENSOR

ProposedArthur North Classification

U,S, Cl, 222/Dig, 1
Int, CL B67d

A system for sensing an out of toner condition in the toner
supply for the development station of a xerographic repro~
ducing machine~ A toner supply 10 is arranged to cornmuni~
cate with the development system (not shown) by means of
conduit 11 and dispensing roll 12, An acoustical wave
generator 13 includes a tone generator 14 coupled to a
suitable piezoelectric ceramic device 15, An acoustical
wave detector system 16 comprises a piezoelectric sensor
17 coupled to a suitable display device such as an oscillo~
scope 18, In practice the display device would comprise
a warning light actuated by suitable comparison circuitry
coupled to the output of the sensor l7~

An out of toner condition can be sensed because of the
difference in the wave dampening properties of toner as
compared to air, When toner is present substantial
attenuation of the acoustical waves will occur between the
piezoelectric generator 15 and the piezoelectric sensor l7~
When no toner is present the amount of attenuation will be
substantially reduced,

I,

Volume 1 Number 2 February 1976 59

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60 XEROX DISCLOSURE JOURNAL

Volume 1 Number 2 February 1976

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