Incremental printing of symbolic information – Ink jet – Controller
Patent
1997-06-30
2000-12-19
Barlow, John
Incremental printing of symbolic information
Ink jet
Controller
347 81, 395105, 400709, B41J 29393, B41J 2125
Patent
active
061619140
ABSTRACT:
Apparatus and techniques are disclosed for aligning the operation of the ink jet printhead cartridges of a multiple printhead ink jet swath printer that includes a print carriage that is movable along a horizontal carriage scan axis, (b) first and second ink jet printhead cartridges supported by the movable carriage for printing onto a print media that is selectively movable along a vertical media scan axis, and (c) an optical sensor supported by the movable carriage. The optical sensor includes a quad photodiode detector whose outputs are indicative of the horizontal positions of vertical test lines imaged on the detector in conjunction with horizontal alignment correction, as well as the vertical positions of horizontal test lines imaged on the detector in conjunction with vertical alignment correction.
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Barlow John
Dickens C.
Hewlett--Packard Company
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