Print head for an electrostatic image

Details Print head for an electrostatic image Print head for an electrostatic image

1986-10-28

1988-02-23

Evans, Arthur G.

Recorders

Electric recording

Electrochemical

3461531, G10D 1510

Patent

active

047273860

ABSTRACT:
An electrostatic print head for creating a latent image on a dielectric recording medium (1) in order to enable said image to be subsequently transferred to a final medium (generally ordinary paper) after development by inking. The print head comprises a conventional multitude of electrodes (E) and associated conterelectrodes (CE) disposed in parallel rows for progressively building up an electrostatic latent image on the moving dielectric medium (1), and includes an additional rotary coupling electrode (EC) which is raised to a direct potential whose average voltage is of the same polarity as the high voltage control pulses applied to the counterelectrodes, which pulses are themselves of opposite polarity to the pulses applied to said electrodes. The coupling electrodes (EC) is pressed against the recording dielectric medium level with the electrodes and the counterelectrodes, and against the opposite side of the medium relative to said electrodes and counterelectrodes.

REFERENCES:
patent: 4447821 (1984-05-01), Yuasa et al.
patent: 4636816 (1987-01-01), Playe

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