Method and apparatus for forming a positive electrostatic image

Details Method and apparatus for forming a positive electrostatic image Method and apparatus for forming a positive electrostatic image

1975-02-18

1977-03-29

Welsh, John D.

Gas separation: apparatus

Magnetic separating means

96 1SD, G03G 13052

Patent

active

040146944

ABSTRACT:
A machine for making a copy on a medium such as paper of a visual image. Particles of toner material are accelerated toward the paper through an apertured screen. Formed on the screen is a pattern of electrostatic charge regions that corresponds to the image so that the arrangement of the toner particles impinging on the paper corresponds to the image. A composite apertured screen composed of two conductive layers separated by an insulative layer and having an insulative layer on one outer surface. Means for establishing oppositely polarized fields across the inner insulative layer and across the outer insulative layer. One of the fields is selectively discharged to control the passage of toner particles through the apertures in the screen.

REFERENCES:
patent: 3689935 (1972-09-01), Pressman et al.
patent: 3694200 (1972-09-01), Pressman
patent: 3713734 (1973-01-01), Crane et al.
patent: 3796490 (1974-03-01), Pressman et al.
patent: 3839027 (1974-10-01), Pressman
patent: 3867673 (1975-02-01), Crane et al.

Affiliated with

Also associated with

Rating

Method and apparatus for forming a positive electrostatic image does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for forming a positive electrostatic image, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for forming a positive electrostatic image will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-546974