Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2007-01-02
2007-01-02
Tran, Huan (Department: 2861)
Incremental printing of symbolic information
Ink jet
Controller
C347S014000
Reexamination Certificate
active
09942070
ABSTRACT:
PPS variation along a scan axis is found by shining a light beam from pen carriage to print-medium position and back to detector, and applying a pathlength/intensity correlation. Sensing is done while scanning, to find relative PPS profile along the track. With no medium in place this measures mechanical imperfections—and can be corrected by later deducting thickness of a medium. If medium is present, adjustment is omitted. For absolute values a plural-lamp sensor is calibrated for each lamp, at the PPS design point. Pagewide/webwide variants are included.
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Boleda Miquel
Castano Jorge
Encrenaz Michel
McCullough James L
Hewlett Packard Development Company, L. P.
Lippman Peter I.
Tran Huan
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