Printing with merged drops using electrostatic deflection
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United States of America Patent
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Apr 15, 2014
Grant Date -
Jan 9, 2014
app pub date -
Jul 9, 2012
filing date -
Jul 9, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus and method of ejecting liquid drops includes modulating a liquid jet to cause it to break off into drop clusters, including first and second drops traveling along a path, separated on average by a drop cluster period. An input image data independent charging waveform of a charging device includes a period that is equal to the cluster period and first and second voltage states having opposing polarities. The charging device produces first and second charge states on the first and second drops, respectively, of each cluster. The first and second drops are deflected away from the path toward first and second catchers, respectively. Relative velocity of drops of a selected drop cluster is modulated in response to input print data causing the drops to form a merged drop traveling along the path having a third charge state that prevents it from being deflected to either catcher.
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