Technique for charging dielectric surfaces to high voltage

Details Technique for charging dielectric surfaces to high voltage Technique for charging dielectric surfaces to high voltage

1975-01-30

1976-02-17

Miller, J. D.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250325, 250326, H01T 1900

Patent

active

039393860

ABSTRACT:
A technique for charging a dielectric surface by corona discharge is described in which the voltage applied to a stationary corona wire is steadily increased over an initial time period to cause the gradual increase in voltage level on the dielectric surface over the same time period. The voltage on the stationary dielectric surface increases with the wire voltage. The potential difference between wire and plate is kept below the sparking voltage, but above the corona current threshold voltage.
After the initial phase, the dielectric surface is moved relative to the corona wire (e.g. a rotating xerographic drum). The corona wire can now be held at its high voltage without sparking between the wire and the dielectric surface.

REFERENCES:
patent: 2314940 (1943-03-01), Hewitt
patent: 3678350 (1972-07-01), Matsumoto et al.

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