US PATENT SUBCLASS 347 / 54
.~.~ Drop-on-demand

Current as of: June, 1999
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347 /   HD   INCREMENTAL PRINTING OF SYMBOLIC INFORMATION

1  DF  INK JET {6}
20  DF  .~ Ejector mechanism (i.e., print head) {13}
54.~.~ Drop-on-demand {3}
55  DF  .~.~.~> With electric field ejection (applied to fluid)
56  DF  .~.~.~> With thermal force ejection {6}
68  DF  .~.~.~> With piezoelectric force ejection {3}

DEFINITION

Classification: 347/54

Drop-on-demand:

(under subclass 20) Subject matter wherein the ejection mechanism is intermittently energized to eject the fluid* onto a receiving medium* on a noncontinuous basis.