Electrostatic color printing utilizing discrete potentials

Details Electrostatic color printing utilizing discrete potentials Electrostatic color printing utilizing discrete potentials

1975-06-16

1978-01-17

Shoop, William M.

Photocopying

Including fiber optics

118645, G03G 1501, G03G 1510

Patent

active

040689387

ABSTRACT:
An apparatus in which an electrostatic latent image is developed simultaneously in two colors. A first portion of the latent image has a potential greater than a first threshold with a second portion thereof having a potential less than a second threshold. The second threshold is less than the first threshold. Particles of a first color are applied to the first portion of the latent image with particles of a second color being applied to the second portion of the latent image. The electrostatic latent image is discharged to a potential less than the second potential and portions thereof having a potential greater than the second threshold by a pre-selected level.

REFERENCES:
patent: 3574456 (1971-04-01), Grace
patent: 3667428 (1972-06-01), Smith
patent: 3702483 (1972-11-01), Fantuz zo

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