Device for producing images on printing image carriers

Details Device for producing images on printing image carriers Device for producing images on printing image carriers

1988-11-02

1990-09-25

Evans, Arthur G.

Recorders

Electric recording

Electrochemical

346139C, G01N 1500

Patent

active

049596683

ABSTRACT:
The invention proposes an electrical image producing device for use with printing image carriers of printing presses. The main components of the device are writing units designed in the form of electrodes which are able to be activated individually in accordance with the image to be produced by connection with a power supply. In the case of a purely electrical form of the device the writing units consist of a stylus which is able to be connected with the power supply via a photoconductor. For driving the stylus use is made of a light guide on which there is a magneto-optic light switching module controlled by current pulses. In one switched state the light switching module allows the passage of a light ray from a light source through the light guide, the light ray passing through the photoconductor and making it locally electrically conducting. In this manner an electric potential is produced at the stylus which cooperates with a counter electrode so as to produce an electric field modifying the printing image carrier.

REFERENCES:
patent: 3090828 (1963-05-01), Baia

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