Surface potential electrometer and image forming apparatus using

Details Surface potential electrometer and image forming apparatus using Surface potential electrometer and image forming apparatus using

1980-04-21

1983-01-11

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

324 72, 355 14CH, 324458, G03G 1500

Patent

active

043679480

ABSTRACT:
The surface potential electrometer includes a reciprocating chopper, a measuring electrode on which a voltage is induced which is associated with the surface potential of a member to be measured, a shield member for shielding the measuring electrode and the chopper from electric field emanating from the member to be measured, and a driver for driving the chopper, thereby detecting the surface potential of the member in the form of an AC signal. The shield member is provided with an aperture for guiding the electric field emanating from the member to the measuring electrode.

REFERENCES:
patent: 3189802 (1965-06-01), Zisman
patent: 3852667 (1974-12-01), Williams et al.
patent: 3852668 (1974-12-01), Hardenbrook et al.
patent: 3898001 (1975-08-01), Hardenbrook et al.
patent: 3944354 (1976-03-01), Benwood et al.
patent: 4000944 (1977-01-01), Fraser
patent: 4003650 (1977-01-01), Courtney et al.
patent: 4063154 (1977-12-01), Andrus et al.
patent: 4106869 (1978-08-01), Buchheit
patent: 4205267 (1980-05-01), Williams

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