Corona charge system and apparatus for electrophotographic...

Details Corona charge system and apparatus for electrophotographic... Corona charge system and apparatus for electrophotographic...

G - Physics

03

G

314/13, 317/3

G03G 13/02 (2006.01) G03G 15/02 (2006.01)

Patent

CA 2029813

HCI 016 P2 Abstract In a high speed electrophotographic printing apparatus and method wherein a charge of desired polarity and potential is applied uniformly to a photoconductive surface of a rapidly rotating drum (50), an improvement is provided which comprises an electrometer (65) located adjacent the drum surface (55) for sensing and measuring the charge imparted to the surface. The electrometer is operatively connected through a programmable logic controller (106) to a variable power output (67) that drives the corona array (60a-e)to impart the charge to the drum surface. Irregularities in charge potential imparted to the surface are thereby measured by the electrometer with appropriate adjustment being made in the charge applied to the drum by the corona array.

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