Ink-jet printer head and ink spraying method for ink-jet printer

Details Ink-jet printer head and ink spraying method for ink-jet printer Ink-jet printer head and ink spraying method for ink-jet printer

1997-06-16

2000-07-18

Barlow, John

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 205

Patent

active

060897007

ABSTRACT:
An ink-jet printer head constructed with individual electrodes formed on a silicon substrate on which oxidization is performed, and each having a region, wetted with an ink, and the other regions coated with insulating layers. A nozzle plate used as a common electrode, is formed on a layer different from the layers of the individual electrodes, and is perforated with orifices through which ink particles are sprayed onto print media. A region wetted with the ink is electrically isolated from the individual electrodes by the insulating layers, produces bubbles in the ink on receipt of electric energy. Ink chamber barriers electrically isolate from each other the adjacent regions of individual electrodes that are wetted with the ink, and thereby increase the force of the jet ejecting the ink droplets. Ink chambers are formed by the ink chamber barriers, each temporarily storing the ink. Bubbles are generated by a difference in the electric current density between the individual electrodes and nozzle plate. The insulating layers prevent leakage current to the adjacent individual electrodes while electrical connectors furnish electric energy to the individual electrodes and nozzle plate.

REFERENCES:
patent: 4275290 (1981-06-01), Cielo et al.
patent: 4893191 (1990-01-01), Tanaka et al.
patent: 5368683 (1994-11-01), Altavela et al.
patent: 5400061 (1995-03-01), Horio et al.
patent: 5787327 (1998-07-01), Matsushita et al.
patent: 5790142 (1998-08-01), Uchinami et al.

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