Ink jet head including phase transition material actuators

Details Ink jet head including phase transition material actuators Ink jet head including phase transition material actuators

1994-08-30

1998-03-17

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

310358, 347 71, B41J 2045

Patent

active

057292620

ABSTRACT:
An ink jet printing head includes a nozzle plate including nozzles, a plurality of ink cavities each containing ink, a plurality of actuators each made of a phase transition material, an oscillating plate having a top surface with which the ink in each ink cavity is brought into contact, and having a bottom surface bonded to each actuator, the oscillating plate pressing the ink in each ink cavity in association with the actuators to discharge ink drops from the nozzles at a sheet of paper so that an image is printed on the paper. In this ink jet printing head, the ink in each ink cavity is pressed by the oscillating plate in accordance with volumetric changes of the actuators, the volumetric changes being developed by applying an electric field to each actuator at a given electric field intensity, the given electric field intensity causing a transition of the phase transition material from an antiferroelectric phase into a ferroelectric phase to take place or causing a transition of the phase transition material from the ferroelectric phase into the antiferroelectric phase to take place.

REFERENCES:
patent: 4380018 (1983-04-01), Andoh et al.
patent: 4523121 (1985-06-01), Takahashi et al.
patent: 5177504 (1993-01-01), Ishii et al.
patent: 5424769 (1995-06-01), Sakai et al.
patent: 5471232 (1995-11-01), Hosono et al.
patent: 5477253 (1995-12-01), Hotomi et al.

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