Contrast control for an electrostatic printer

Details Contrast control for an electrostatic printer Contrast control for an electrostatic printer

1985-09-12

1987-06-09

Evans, Arthur G.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346155, G01D 1506

Patent

active

046723994

ABSTRACT:
An electrostatic printing apparatus is disclosed wherein a photoconductive material is irradiated to activate a stylus array. In accordance with the subject invention, the write time of the stylus array can be controlled thereby improving contrast ratio. This result is achieved by providing a second discrete photoconductive layer which is irradiated a fixed time after a first photoconductive layer. The second photoconductive layer is connected in a manner to shunt current from the stylus array thereby effecting the write time.

REFERENCES:
patent: 3090828 (1963-05-01), Bain
patent: 4392194 (1983-07-01), Hinz et al.

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