Photocopying – Contact printing – Light boxes
Patent
1992-11-17
1994-01-18
Moses, R. L.
Photocopying
Contact printing
Light boxes
355274, 355268, 355326R, 355256, 430100, 430126, G03G 1501, G03G 1514, G03G 1314, G03G 1310
Patent
active
052803260
ABSTRACT:
Imaging apparatus including an image forming surface, image forming apparatus for defining an electrostatic latent image on the image forming surface, the latent image having image portions and background portions, development apparatus for developing the electrostatic latent image in a reversal mode, using electrically charged pigmented toner particles to form a developed image overlying the image portions, whereby the developed image on the image forming surface is at a first electrical potential and the background portions on the image forming surface are at a second electrical potential, discharge apparatus for partially discharging the image forming surface so that the developed image is at a third electrical potential and the background portions are at a fourth potential and an image receiving surface at a fifth potential, for receiving the developed image from the image forming surface, wherein the difference between the fourth potential and the fifth potential is low enough such that substantially no electrical discharge occurs between the image receiving surface and the background portions.
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Niv Yehuda
Pinhas Hanna
Moses R. L.
Spectrum Sciences B.V.
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