Toner concentration detector for a two-component developer

Details Toner concentration detector for a two-component developer Toner concentration detector for a two-component developer

1993-02-09

1994-05-10

Moses, R. L.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

355246, B05C 1100, G03G 2100

Patent

active

053104250

ABSTRACT:
A toner concentration detecting device for detecting a toner concentration of a two component developer including a differential transformer which is connected with a phase detecting circuit. A variable capacitance diode is connected between the primary coil and the secondary coil and a variable resistor is provided to supply the variable capacitance diode with a DC voltage to vary the capacitance of the diode. The variable resistor and DC voltage are located at a remote location from the transformer.

REFERENCES:
patent: 3519930 (1970-07-01), Bradley
patent: 4240375 (1980-12-01), Terashima
patent: 4270487 (1981-06-01), Terashima et al.
patent: 4592645 (1986-06-01), Kanai et al.
patent: 4721985 (1988-01-01), Pavlidis et al.
patent: 4845467 (1989-07-01), Nagaoka

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