Incremental printing of symbolic information – Ink jet – Controller
Patent
1995-01-20
1998-02-17
Tran, Huan H.
Incremental printing of symbolic information
Ink jet
Controller
347 42, 347104, 347188, B41J 2938, B41J 2155, B41J 201
Patent
active
057196028
ABSTRACT:
A page-wide-array ("PWA") inkjet printer includes a printer element defining a printhead with thousands of nozzles spanning a pagewidth. A media sheet travels along a media path adjacent to the printhead to receive character or graphic markings. Typically, a media sheet accelerates from rest to a constant velocity. To optimize print speed nozzle timing is controlled to respond to changes in media velocity. Printing occurs while the media is accelerating and while traveling at a constant velocity. A sensor positioned in fixed relation to a PWA printer element detects the media's actual velocity. Actual velocity is fed back to a printhead controller which compares actual velocity to a rated constant velocity. If actual velocity is slower than the rated velocity, then nozzle timing is adjusted to be slower than a rated timing. If actual velocity is faster than rated velocity, then nozzle timing is adjusted to be faster than the rated timing.
REFERENCES:
patent: 4176013 (1979-11-01), Hoskins et al.
patent: 5089712 (1992-02-01), Holland
patent: 5398053 (1995-03-01), Hirosawa et al.
Buskirk William A.
Hackleman David E.
Hallacher Craig A.
Hewlett--Packard Company
Tran Huan H.
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