Recorder operating with liquid drops and comprising elongates pi

Details Recorder operating with liquid drops and comprising elongates pi Recorder operating with liquid drops and comprising elongates pi

1984-05-23

1985-09-03

Miller, Jr., George H.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 11, 310330, 310368, G01D 1518, H01L 4104

Patent

active

045395756

ABSTRACT:
In an illustrated transducer construction, electric potential changes applied to the transducer effect piezoelectric movement for causing recording fluid to be ejected through a jet orifice and applied on a recording carrier. In order to increase the maximum drop frequency and in order to improve the drop formation and drop speed, in accordance with the disclosure the linear distance of the connection points of the two ends of each transducer with the orifice plate is smaller than the length between the connection points as measured along the transducer. The transducers are thus mechanically prestressed to assume an arcuate configuration so that, in the rest state, recording fluid is disposed between the transducer and the plate. Given an electric driving pulse the transducers are shortened and conform with the plate in a planar fashion. Immediately after the excitation, each transducer returns to its arcuate initial configuration.

REFERENCES:
patent: 3370187 (1968-02-01), Straube
patent: 3479536 (1969-11-01), Norris
patent: 3510698 (1970-05-01), Massa
patent: 4072959 (1978-02-01), Elmqvist
patent: 4140936 (1979-02-01), Bullock
patent: 4409601 (1983-10-01), Nilsson et al.
patent: 4431934 (1984-02-01), Kleinschmidt et al.
patent: 4438441 (1984-03-01), Bolmgren et al.

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