Image information electrostatic recording device

Abstract

An image information device of a construction wherein there are provided a laser oscillator; a modulator capable of modulating a laser beam oscillated from the laser oscillator by an external signal; a photosensitive body consisting essentially of an insulating layer, a photoconductive layer, and an electrically conductive substrate; a principal scanning means such as a polygonal revolving mirror, galvano-mirror, etc. to cause the modulated laser beam to scan the photosensitive body in the principal scanning direction; an optical system to cause the laser beam to focus on the photosensitive body; a position detection means to establish a commencing position of the scanning laser beam on the photosensitive body; means to input an image signal into the modulator in synchronism with the principal scanning means by an output from the position detection means; means to electrically charge the photosensitive body; corona discharge means to impress on the photosensitive body an A.C. corona discharge or a D.C. corona discharge having an opposite polarity to the above-mentioned electric charge simultaneously with, or immediately before, or immediately after, the scanning of the photosensitive body with the laser beam; means to effect overall exposure of the photosensitive body; means to develop an electrostatic latent image formed by the abovementioned means; means to transfer the latent image onto an image transfer material; and means to clean the photosensitive body.