Toner concentration monitor and method

Details Toner concentration monitor and method Toner concentration monitor and method

1996-07-23

1998-03-17

Smith, Matthew S.

Electrophotography

Control of electrophotography process

Control of developing

324204, 399 30, G03G 1510

Patent

active

057297878

ABSTRACT:
A toner monitor particularly suited for monitoring toner concentration in a two-component development mixture includes an electrically conductive probe mounted in a wall of a development apparatus but the probe does not extend substantially into the developer mixture. A square wave generator or other multifrequency signal source generates a first signal so that electromagnetic energy is carried along the probe and into the mixture. A second signal is generated in response to an impedance mismatch between the mixture and the probe. In response to the second signal, a third signal is generated relating to adjustment of composition content of the development mixture.

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