Direct printing method with improved control function

Details Direct printing method with improved control function Direct printing method with improved control function

1997-02-18

2000-01-11

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347120, G03G 1500

Patent

active

060128011

ABSTRACT:
The present invention relates to a direct electrostatic printing method, in which a stream of computer generated signals, defining an image information, are converted to a pattern of electrostatic fields which selectively permit or restrict the transport of charged toner particles from a particle source toward a back electrode and control the deposition of those charged toner particles in an image configuration onto an image receiving medium. Particularly, the present invention refers to a direct electrostatic printing method performed in consecutive print cycles, each of which includes at least one development period (t.sub.b) and at least one recovering period (t.sub.w) subsequent to each development period (t.sub.b), wherein the pattern of electrostatic fields is produced during at least a part of each development period (t.sub.b) to selectively permit or restrict the transport of charged toner particles from a particle source toward a back electrode, and an electric field is produced during at least a part of each recovering period (t.sub.w) to repel a part of the transported charged toner particles back toward the particle source.

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