Method and apparatus for reducing the density of background area

Details Method and apparatus for reducing the density of background area Method and apparatus for reducing the density of background area

1974-11-01

1976-04-06

Willis, Davis L.

Radiant energy

Source with charged plate-type detector

G03G 15044

Patent

active

039492222

ABSTRACT:
Apparatus and method for improving an electron radiograph by reducing the charge density in the background area of the electrostatic image and thereby reducing the amount of toner attracted to such areas during developing. The latent electrostatic image is generated by exposure to a radiation source in an imaging chamber and the higher charge densities are then neutralized by exposing the electrostatic image to an ion discharge, with a bias potential for limiting the neutralizing action, after which the electrostatic image is developed into a visual image.

REFERENCES:
patent: 3598579 (1971-08-01), Robinson
patent: 3774029 (1973-11-01), Muntz et al.
patent: 3780288 (1973-12-01), Dryden

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