Ink jet print head having a projecting ejection electrode

Details Ink jet print head having a projecting ejection electrode Ink jet print head having a projecting ejection electrode

1996-12-12

1998-09-01

Lee, S.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

G01D 1516

Patent

active

058017305

ABSTRACT:
An ink jet print head using an electrostatic field and being capable of printing characters and letters with a high precision includes an ink chamber for keeping therein ink including charged toner particles, an ejection opening for establishing connection between the ink chamber and an external space, an ejection electrode arranged to be slightly projected from the ejection opening, a cataphoresis electrode disposed on a side opposing to the ejection opening of the ink chamber, an opposing electrode arranged to oppose the ejection electrode with a recording media therebetween, a cataphoresis voltage source for applying a predetermined voltage to the cataphoresis electrode, and an ejection voltage source for applying a predetermined pulse voltage to the ejection electrode. The ejection electrode is coated with a hydropholic insulating resin.

REFERENCES:
patent: 3662399 (1972-05-01), Yanou et al.
patent: 3886565 (1975-05-01), Kojima
patent: 4206467 (1980-06-01), Fujii
patent: 4333086 (1982-06-01), Ebi
patent: 4575737 (1986-03-01), Vermot-Gaud et al.
patent: 4806956 (1989-02-01), Nishikawa et al.
Chen et al.; "Ink Jet Emitter"; Feb. 1972; IBM Technical Disclosure Bulletin; vol. 14, No. 9; p. 2797.

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