Encapsulated piezoelectric pressure pulse drop ejector apparatus

Details Encapsulated piezoelectric pressure pulse drop ejector apparatus Encapsulated piezoelectric pressure pulse drop ejector apparatus

1979-06-01

1981-01-06

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

310328, 310345, G01D 1518

Patent

active

042439957

ABSTRACT:
A pulsed liquid droplet ejecting apparatus wherein a rectangular piezoelectric transducer is arranged abaxially over an ink containing channel with an edge in operating relationship with the channel. The edge of the transducer is held fixed so that on excitation of the transducer by an electrical pulse, the transducer extends towards the channel ejecting a drop. The piezoelectric transducer is coated with a material, which provides shear relief between the piezoelectric transducer and the ejector embedding material.

REFERENCES:
patent: 2512743 (1950-06-01), Hansell
patent: 3452360 (1969-06-01), Williamson
patent: 3857049 (1974-12-01), Zoltan
patent: 3927410 (1975-12-01), Pimbley
patent: 3946398 (1976-03-01), Kyser
patent: 4025928 (1977-05-01), Hou
patent: 4072959 (1978-02-01), Elmquist
Stemme & Larsson, The Piezoelectric Capillary Injector . . . , IEEE Trans. on Electron Devices, Jan. 1973, pp. 14-19.
Hammerschmidt et al., Crystal Isolation for Ink Jet Heads, IBM Tech. Disc. Bulletin, vol. 21, No. 11, Apr. 1979, p. 4645.

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