Charging mask for electrophotography

Details Charging mask for electrophotography Charging mask for electrophotography

1975-04-23

1976-11-09

Smith, Alfred E.

Radiant energy

Corona irradiation

Charging of objects

250315R, 317262A, G03G 1300, G03G 1500, H01T 1904

Patent

active

039913112

ABSTRACT:
Disclosed is an improved apparatus for applying a uniform electrostatic charge to a predetermined portion of an electrophotographic film. The apparatus includes a corona generation source and a mask framing the predetermined portion of the film. The improvement consists of an electrically conductive surface surrounding the frame opening of the mask and spaced from the surface of the film and a capacitor interconnecting the electrically conductive surface with ground. The electrically conductive surface on the mask develops a voltage close to that of the surface potential of the film during corona charging so that very little charge field discontinuity exists between the mask and the film, thereby permitting uniform electrostatic charging of the film up to the edges of the portion being charged.

REFERENCES:
patent: 3438053 (1969-04-01), Howell
patent: 3603851 (1971-09-01), Metcalf et al.
patent: 3688107 (1972-08-01), Schneider et al.
Terman; F. E., Radio Engineers' Handbook, First Edition, McGraw-Hill, New York and London, 1943, p. 602.

Affiliated with

Also associated with

Rating

Charging mask for electrophotography does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Charging mask for electrophotography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charging mask for electrophotography will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1727230