APPARATUS FOR EXPOSING LATENT IMAGE MARGINS IN ELECTROPHOTOGRAPHIC COPYING APPARATUS

摘要

Apparatus for obtaining electrophotographic copies of improved quality and appearance in which a rectangular frame member is disposed adjacent the photoreceptor circumscribing an area on the photoreceptor onto which the images to be reproduced are projected. The frame member includes an internal channel opening downwardly onto the surface of the photoreceptor. Corona discharge means are supported in the channel along the leading side transversely to the direction of movement of the photoreceptor to uniformly charge the surface of the photoreceptor as it is advanced beneath the frame member. Illumination means also are supported internally of the frame member within the channel on all four sides for uniformly discharging the charged surface of the photoreceptor in the areas surrounding the imaged area underlying the frame member to eliminate development thereof.