Bidirectional hot melt ink jet printing
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United States of America Patent
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-
Dec 24, 1991
Issued Date -
N/A
app pub date -
Dec 15, 1989
filing date -
May 31, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In the representative embodiments of the invention described in the specification, an ink jet head has a series of aligned arrays of ink jet orifices arranged to project drops of different colored inks in sequence to the same location on a substrate during each scan of the ink jet head adjacent to the substrate. The spacing of the orifices in each aligned array and the speed of the ink jet head during the scanning are arranged so that all the ink drops applied at the same location on the substrate are applied in a time period of no more than about 100 milliseconds and preferably no more than 50 milliseconds. Moreover, to avoid banding the lines produced by successive scans of the head are interlaced so as to produce a periodic frequency of no more than about four lines per millimeter.
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