Series capacitor ink sensor for monitoring liquid developer mate

Details Series capacitor ink sensor for monitoring liquid developer mate Series capacitor ink sensor for monitoring liquid developer mate

1998-01-08

1998-12-08

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of developing

324 711, G03G 1510

Patent

active

058483225

ABSTRACT:
An apparatus for determining charge density and mobility in a liquid solution having electrically charged particles therein. The apparatus includes an electrode, and a dielectric member having a first surface situated opposite the electrode for providing a volume therebetween in which a sample of the liquid may be placed. A fixed bias voltage applied to the electrode to produce an electrical current flow through the liquid solution and the dielectric member. A device coupled to the dielectric member, measures the electrical current as a function of time to provide a measure of voltage decay across the liquid solution. The voltage decay corresponds to the charge density of the liquid solution.

REFERENCES:
patent: 4928065 (1990-05-01), Lane et al.
patent: 5302482 (1994-04-01), Elmasry et al.

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