Ink jet recording apparatus

Details Ink jet recording apparatus Ink jet recording apparatus

1998-03-13

2000-03-14

Beatty, Robert

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 70, G01D 1516

Patent

active

060363010

ABSTRACT:
An ink jet recording apparatus includes an ink holding chamber, an ultrasonic wave generator having a piezoelectric transducer structure consisting of a piezoelectric member, and first and second electrodes formed on opposing surfaces of the piezoelectric member, and a driver for driving the piezoelectric transducer structure. The piezoelectric transducer structure is coupled acoustically with the ink liquid. The apparatus further includes ultrasonic wave focusing member formed on the ultrasonic wave generator and including an acoustic lens for focusing an ultrasonic wave generated from the ultrasonic wave generator in a vicinity close to a surface of the ink liquid, and a supporting member for supporting the ultrasonic wave generator on an opposite side to the ultrasonic wave focusing member. The supporting member supports the ultrasonic wave generator via an ultrasonic wave canceling medium, in a region corresponding to an overlapping region between the piezoelectric transducer structure and the acoustic lens.

REFERENCES:
patent: 4719480 (1988-01-01), Elrod et al.
patent: 5339101 (1994-08-01), Rawson et al.

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