Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2008-03-25
2008-03-25
Feggins, K. (Department: 2861)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
Reexamination Certificate
active
10949605
ABSTRACT:
Certain embodiments provide a system and method for auto-threshold adjustment using a continuous ink jet printer. An embodiment of a system includes a nozzle for producing ink drops from an ink stream, a sensor positioned with respect to the nozzle for measuring charge from the ink drops to generate a charge signal, a peak detector for detecting peaks in the charge signal, and a threshold storage device for adjusting the threshold based on a number of detected peaks. In an embodiment, the threshold storage device stores the threshold. The threshold storage device may be a digital potentiometer, for example. The system may also include a comparator comparing the charge signal to the threshold. The comparator may select between the threshold and a standard reference signal to compare to the charge signal.
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Fickling Andrew Earl
Rybicki Michael J.
Feggins K.
McAndrews Held & Malloy, Ltd
Videojet Technologies Inc.
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