Pin charging device for use in xerography

Details Pin charging device for use in xerography Pin charging device for use in xerography

1983-01-26

1985-08-06

Braun, Fred L.

Photocopying

Including fiber optics

250324, 355 14CH, G03G 1502

Patent

active

045332304

ABSTRACT:
A discharge apparatus for use in applying a uniform electrostatic charge to a charge retentive surface. Specifically, the apparatus has an array of pin or needle electrodes for negatively charging the surface. The electrodes are coupled to a pulsed d.c. power supply designed to cause them to operate at sufficiently high current densities to insure stable output therefrom yet due to the pulsing stability is achieved at relatively low current levels. Thus, operation at higher current densities for shorter intervals, for example, at half duty achieves output stability at lower current levels.

REFERENCES:
patent: 3244083 (1966-04-01), Gundlach
patent: 3254215 (1966-05-01), Oliphant
patent: 3374348 (1968-03-01), Ostensen
patent: 3658407 (1972-04-01), Kitano et al.
patent: 3947106 (1976-03-01), Hamaguchi et al.
patent: 3977777 (1976-08-01), Tanaka et al.
patent: 4136942 (1979-01-01), Nakahata et al.
patent: 4372669 (1983-02-01), Fantuzzo et al.

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