G - Physics – 03 – G
Patent
G - Physics
03
G
314/37, 32/12.14
G03G 13/10 (2006.01) G03G 15/06 (2006.01) G03G 15/10 (2006.01) G03G 15/22 (2006.01)
Patent
CA 1149154
Title of the Invention AUTOMATIC DEVELOPMENT ELECTRODE BIAS CONTROL SYSTEM Abstract of the Disclosure An automatic control system for the bias on a development electrode in which a plurality of ground- insulated, narrow floating electrodes are spaced along a line adjacent the entrance of a liquid developer applicator unit. the floating electrodes relatively scan image areas of the surface of an organic photoconductor carried by a conductive support moving through the developer unit. Owing to conduction of a charge from the photoconductive surface through the developer liquid to the floating electrodes, they assume potentials each of which is a function of the average potential of the image area subtended by the floating electrode. The potential of each floating electrode is sensed by a high input impedance measuring circuit which selects the potential of the low- est value, amplifies the selected potential and applies the amplified voltage to the biasing electrode or electrodes of the developer system. A fully charged and unexposed area of the surface following the image area produces a reverse bias which cleans the biasing electrodes as the fully charged area passes through the developer system. -1-
222749
Gardiner Kenneth W.
Schaefer Louis F.
Macrae & Co.
Savin Corporation
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