Apertureless direct electronic printing

Details Apertureless direct electronic printing Apertureless direct electronic printing

1991-02-28

1992-09-15

Miller, Jr., George H.

Recorders

Electric recording

Electrochemical

346155, G01D 1506

Patent

active

051482045

ABSTRACT:
Apertureless Direct Electronic Printing (ADEPT) is effected through imagewise toner transfer across a gap by biasing individual electrodes selectively using a localized electrostatic field varying in time in such a way that the approximate impulse relation 1:2 is maintained, between the first, forward directing pulse and the subsequent reverse pulse (or a sequence of alternating pulses). In this improvement, no apertures between the donor and the receiver are utilized, yet imagewise resolution is preserved. In other words undesirable defocusing is preclude. The electrodes, in one embodiment, are implemented as biased discs embedded in a dielectric substrate material.

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