Formation of image

Abstract

Abstract PURPOSE:To make the high speed formation of two-color images possible with a simplified optical system by using a recording medium consisting of a conductive substrate, a photoconductive substrate and a transparent insulating layer, and subjecting the same to a specific electrostatic charging treatment then to the 1st developing after exposure of the 1st light image and the 2nd light image followed by the 2nd developing after uniform exposure. CONSTITUTION:The surface of a photoreceptor formed successively with a photoconductive layer 2 and a transparent insulating layer 3 on a conductive substrate 1 is electrostatically charged uniformly to form the electric charge reverse from that of the surface at the boundary of the layer 2 and the layer 3. Said surface is electrostatically charged reverse to decrease or invert the surface charge. After the 1st light image 1E is exposed thereon and the surface of the recording medium is charged uniformly in succession, the 2nd light image 2E is irradiated thereon. The area irradiated with the 2nd light image is reversally developed by using an electrostatically charged toner 4 of the same polarity as that of the 1st latent image and the recording medium is exposed uniformly; thereafter the 1st light image part is developed with the 2nd developer. The two-color images are transferred, whereby two-color images are obtained.

Inventors

• 👤 Masayasu Anzai
• 👤 安西　正保

Bibliographic Details