Toner level detection system

Details Toner level detection system Toner level detection system

1996-07-01

1998-05-26

Kaufman, Joseph

Dispensing

With recorder, register, indicator, signal or exhibitor

222 64, 222DIG1, B67D 506

Patent

active

057553580

ABSTRACT:
A system for dispensing toner particles from a toner hopper to a development system, a sensing system for detecting low toner condition within the toner hopper, the sensing system including a flexible wall assembly mounted within the hopper and in fluid communication with the toner particles within the toner hopper, the flexible wall assembly being adapted to transmit an interior pressure generated by the toner within the toner hopper being indicative of an amount of toner present therein; and a sensor assembly mounted exterior to the toner hopper and in communication with the flexible wall assembly, for sensing the interior pressure. There is provided circuitry responsive to the sensor for generating a feed back signal indicative of a low toner condition within the toner hopper.

REFERENCES:
patent: 2696606 (1954-12-01), de la Pomelie
patent: 3920155 (1975-11-01), Whited
patent: 3979012 (1976-09-01), Arfert et al.
patent: 4135642 (1979-01-01), Forward et al.
patent: 4159786 (1979-07-01), Biddle, III et al.
patent: 4289026 (1981-09-01), Neumann
patent: 4579253 (1986-04-01), Shenier
patent: 5216462 (1993-06-01), Nakajima et al.
patent: 5435461 (1995-07-01), Smith et al.
Xerox Disclosure Journal, "Toner Level Sensor", vol. 5, No. 1, Jan./Feb. 1980 p. 85.

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