Ink jet print head

Details Ink jet print head Ink jet print head

1997-01-02

1999-08-03

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 2045

Patent

active

059331704

ABSTRACT:
An ink jet print head is disclosed which includes an ink nozzle member with nozzles, an ink pump member disposed on the ink nozzle member and having ink chambers formed behind the respective nozzles, and piezoelectric/electrostrictive elements each disposed on a wall defining the corresponding ink chamber, for deforming the wall to change a pressure of the ink chamber, whereby the ink in the ink chamber is jetted through the corresponding nozzle. The ink pump member consists of a spacer plate having windows which are closed by a closure plate and a connecting plate disposed on the spacer plate, so as to give the respective ink chambers. The connecting plate has communication holes through which the ink chambers communicate with the nozzles. The spacer plate, closure plate and connecting plate are formed from respective ceramic green sheets, which are laminated on each other and fired into an integral ceramic structure as the ink pump member. The piezoelectric/electrostrictive element includes a pair of electrodes and a piezoelectric/electrostrictive layer, which are formed by a film-forming method on an outer surface of the closure plate.

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patent: 5126615 (1992-06-01), Takeuchi et al.
patent: 5359354 (1994-10-01), Hiraishi et al.
patent: 5376856 (1994-12-01), Takeuchi et al.
patent: 5475279 (1995-12-01), Takeuchi et al.

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