Acoustic ink printhead

Details Acoustic ink printhead Acoustic ink printhead

1991-12-30

1994-08-16

Grimley, A. T.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

G01D 1516

Patent

active

053391012

ABSTRACT:
A printhead for an acoustic ink printer has a piezoelectric transducer on one surface of a substrate. A layer of a dielectric material is provided on the surface of the transducer away from the substrate. A Fresnel lens is formed in the surface of the dielectric layer away from the transducer, for focusing sound energy near the surface of a body of ink adjacent the dielectric layer. Thus the transducer and lens are both on the same side of the substrate. A pit may be formed in the substrate under the transducer. The transducer may be a body of piezoelectric material sandwiched between a pair of electrodes, the lower electrode of which has a thickness that is a quarter wave at the excitation frequency of the transducer. An anti-reflective coating may be provided on the lower surface of the substrate, with a body of an absorptive material abutting the anti-reflective layer, or an absorptive material having an acoustic impedance approximately matching that of the substrate may be coated on the lower surface of the substrate.

REFERENCES:
patent: 3904996 (1975-09-01), Rosenfeld
patent: 4447754 (1984-05-01), Wagers
patent: 4598261 (1986-07-01), Ballato
patent: 4719476 (1988-01-01), Elrod et al.
patent: 4719480 (1988-01-01), Elrod et al.
patent: 4748461 (1988-05-01), Elrod
patent: 4751529 (1988-06-01), Elrod et al.
patent: 4751530 (1988-06-01), Elrod et al.
patent: 4751534 (1988-06-01), Elrod et al.
patent: 4782350 (1988-11-01), Smith et al.
patent: 4797693 (1989-01-01), Quate
patent: 4801953 (1989-01-01), Quate
patent: 5041849 (1991-08-01), Quate et al.

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