Automatic development dispenser control

Details Automatic development dispenser control Automatic development dispenser control

1979-05-11

1982-04-27

Rolla, Joseph J.

Dispensing

Automatic control

Delivery from source controlled by quantity in discharging...

222DIG1, 118691, 355 14C, B67D 508

Patent

active

043266460

ABSTRACT:
An automatic development control system having a sensor providing a signal representative of developed toner mass on a patch sample on the photoreceptor. The signal is conveyed to a comparator through signal processing circuits for comparing with a reference signal. The signal processing circuits include digital to analog circuitry also capable of providing analog to digital conversion. The reference signal represents an undeveloped photoreceptor signal normalized to accommodate changing photoreceptor, sensor and operating environment characteristics. A dispenser solenoid activates a toner dispenser through an interrupt mechanism in given increments of time depending upon the error signals generated by the comparator.

REFERENCES:
patent: 4032227 (1977-06-01), Hubbard et al.
patent: 4065031 (1977-12-01), Wiggins et al.
patent: 4108545 (1978-08-01), Eckert et al.
Smith; "Toner concentration control", 4-77, p. 4078, IBM Technical Disclosure Bulletin, vol. 19, No. 11.

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