Incremental printing of symbolic information – Ink jet – Controller
Patent
1993-05-10
1995-10-24
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Controller
347 15, 347 68, B41J 2045, B41J 2205
Patent
active
054614031
ABSTRACT:
An ink jet printhead and an associated method for operatively driving the ink jet printhead to cause the ejection of a volume modulatable droplet from an ink-carrying channel thereof partially defined by a piezoelectric sidewall actuator. The voltage applied across the sidewall actuator is raised from a rest voltage to a first voltage to deflect the sidewall actuator from a rest position to a first position and maintained at the first voltage for a first period of time. The voltage applied across the sidewall actuator is then dropped to a second voltage, lower than the rest voltage, to deflect the sidewall actuator from the first position, past the rest position, to a second position and maintained at the second voltage for a second period of time. The voltage applied across the sidewall actuator is then returned to the rest voltage to deflect the sidewall actuator back to the rest position. The first and second time periods are selected, relative to each other, to select a droplet volume for ink ejected from the ink-carrying channel. The voltage applied across the sidewall actuator is then returned to the rest voltage, thereby causing the ejection of a droplet of ink having the selected droplet volume.
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Stortz James L.
Wallace David B.
Bobb Alrick
Compaq Computer Corporation
Fuller Benjamin R.
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