Device with control grid for electrostatographic reproduction of

Details Device with control grid for electrostatographic reproduction of Device with control grid for electrostatographic reproduction of

1975-05-27

1977-01-25

Lucas, Jay P.

Recorders

Electric recording

Electrochemical

346160, G03G 1504

Patent

active

040054381

ABSTRACT:
Apparatus and method for converting an optical image into an electrostatographic image. A vacuum tube device has a source of electrons which can deposit electrostatic charge on an array of conductors coupling an exterior surface of the vacuum tube device with an exterior surface. A photoconducting electrode, interposed between the electron source and the conductor array, is charged by depositing electrons thereon in the absence of conductivity inducing radiation. The deposited electronic charge is selectively removed by applying an optical image to the photosensitive device, the removal of deposited charge being a function of the radiation intensity of related portions of the applied image. The conductor array is thereafter flooded with electrons, the amount of charge reaching the conductor array depending on the unremoved charge remaining on an associated region of the photosensitive electrode.
The charge on the external region of the conductor array can be transferred to a suitable medium and the resulting electrostatic image developed to produce a reproduction of the original optical image.

REFERENCES:
patent: 3368106 (1968-02-01), Berthold
patent: 3419888 (1968-12-01), Levy
patent: 3495267 (1970-02-01), Brodie
patent: 3787876 (1974-01-01), Pressman
IBM Tech. Disc. Bull., vol. 15, No. 2 p. 575, July, 1972, Output Control for Ionic Print Head, R. E. McCurry & C. A. Speicher.

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