Konishiroku Photo Industry Co., Ltd.

Tutomu Furuya

Shigeru Inowa

Issei Nakamura

A process for forming electrostatic latent images to be developed by a color toner. The process comprises the steps of forming a first electrostatic image by charging a photoconductive layer formed on a first ion beam controlling screen, exposing the charged photoconductive layer imagewise to light based on a first image information, disposing a recording material having an insulating surface so that it confronts the exposed photoconductive layer and radiating ions on the insulating surface of the recording material through said first screen; and forming a corrected electrostatic latent image by charging a photoconductive layer formed on a second ion beam controlling screen, exposing the charged photoconductive layer of the second screen to light based on a second image information, disposing the recording material having the first electrostatic image formed thereon so that it confronts the exposed photoconductive layer of the second screen and radiating ions on the insulating surface of the recording material through said second screen. Each of the first and second ion beam controlling screen comprises a base composed of a metal lattice having numerous penetrating holes, a photoconductive layer formed on one surface of the base, an insulating layer formed on the other surface of the base, and a biasing conductive layer formed on the insulating layer.

Screen process for forming electrostatic latent images

Improved method and apparatus for forming an electrostatic latent image on a recording medium by the simultaneous projection of an ion current and exposure to image light, in which a control grid for controlling the ion current has a plurality of layers, including a photoconductive layer, a conductive layer, and an insulating layer. A first bias voltage is applied to the conductive layer to form an electric field which directs the ion current toward the recording medium, and a second bias voltage, higher than the first bias voltage, forms a second electric field in the control grid for controlling passage of the ions. The recording medium is adapted to absorb the image light thereon.

Method and apparatus for forming an electrostatic latent image using an

A process for forming electrostatic latent images to be developed by a color toner. The process comprises steps of electrically charging a photoconductive layer of an ion-beam controlling screen, exposing the photoconductive layer electrically charged to a first image information, disposing a recording medium having a photoconductive layer so as to oppose to the exposed photoconductive layer, and applying ions to the photoconductive layer of the recording medium through the screen to form an electrostatic latent image having a background of charged potential. The photoconductive layer of the recording medium in which the electrostatic latent image is formed is exposed to a second image information to produce a corrected electrostatic latent image.

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Hachioji, Japan

Tutomu Furuya