Electrostatic write head for electronic printing press

Details Electrostatic write head for electronic printing press Electrostatic write head for electronic printing press

1997-05-08

2000-12-12

Le, N.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347112, B41J 239

Patent

active

061605670

ABSTRACT:
An electrostatic write head for writing pixels on a print cylinder is disclosed in which a continuous wave radio-frequency source is applied to a radio-frequency electrode disposed on a first side of a dielectric body. A control electrode is disposed on the second side of the dielectric body. When the voltage at the radio-frequency electrode is sufficiently high, a plasma containing electrons, negatively charged ions and positively charged ions ignites near the second side of the dielectric body. While these conditions are maintained, a varying control signal is applied to the control electrode. When a print cylinder having a conducting reference electrode is brought near the plasma, the plasma contacts the surface of the print cylinder and causes it to become charged to a voltage which directly relates to the control signal, thus writing a charged pixel on the surface of the print cylinder.

REFERENCES:
patent: 4792860 (1988-12-01), Kuehnle
patent: 4841313 (1989-06-01), Weiner
patent: 4992807 (1991-02-01), Thomson
patent: 5159358 (1992-10-01), Kubelik
patent: 5270729 (1993-12-01), Stearns
patent: 5406314 (1995-04-01), Kuehnle
patent: 5592206 (1997-01-01), Watanabe et al.
Hideyuki Nakao et al., "Solid State Ion Generator For Ion-Jet Head", Proceedings of IS&T's Eleventh International Congress on Advances In Non-Impact Printing Technologies (1995), pp. 522-524.

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