Automatic development dispenser control

Details Automatic development dispenser control Automatic development dispenser control

G - Physics

03

G

314/37

G03G 15/00 (2006.01) G03G 15/08 (2006.01)

Patent

CA 1142998

AUTOMATIC DEVELOPMENT DISPENSER CONTROL ABSTRACT OF THE DISCLOSURE 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 pro- cessing 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 undeve- loped 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 incre- ments of time depending upon the error signals generated by the comparator.

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