Simultaneous charging and exposure for pictorial quality

Details Simultaneous charging and exposure for pictorial quality Simultaneous charging and exposure for pictorial quality

G - Physics

03

G

314/23

G03G 15/02 (2006.01) G03G 15/04 (2006.01) G03G 15/22 (2006.01) G03G 15/24 (2006.01)

Patent

CA 2022933

Apparatus and method for forming an electrostatic latent image on an imaging member having a photoconductive insulating layer has a voltage sensitive corona charging device with a corona generating electrode and a control electrode positioned in charging relationship to the photoconductive insulating layer, means to energize the charging device to charge the photoconductive insulating layer to a first level comprising means to apply a corona generating voltage to the corona generating electrode and to apply a control voltage of a first magnitude to the control electrode, and means to expose the photoconductive insulating layer to an image pattern simultaneously while the charging device is energized.

L'invention est constituée par un appareil et une méthode servant à former une image électrostatique latente sur un élément d'imagerie comportant une couche isolante photoconductrice. Cet appareil et cette méthode utilisent un dispositif de charge sensible à la tension dotée d'une électrode génératrice d'effet corona et d'une électrode de commande montées en relation de charge avec la couche isolante photoconductrice, un dispositif servant à exciter le dispositif de charge pour charger la couche isolante photoconductrice à un premier niveau comportant un dispositif servant à appliquer une tension génératrice d'effet corona à l'électrode génératrice d'effet corona et à appliquer une tension de commande d'une première grandeur à l'électrode de commande, et un dispositif servant à exposer la couche isolante photoconductrice à une scène d'imagerie pendant que le dispositif de charge est excité.

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