Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1994-11-25
1996-12-03
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 40, B41J 221, B41J 215, B41J 2145
Patent
active
055812848
ABSTRACT:
A method of extending the useful life of a printbar for black ink in a multi-color printbar, full width array color ink jet printer by checking each nozzle in the printbar for droplet ejection; identifying any nozzle which fails to eject a droplet as a problem nozzle, and substituting at least one droplet from a nozzle in another printbar having a different color of ink. The substitute fill-in with a cyan droplet, cyan and magenta droplets, or cyan, magenta, and yellow droplets for process black prevents a missing spot and provides adequate printing quality for black printing, such as, for text, so that immediate printbar replacement is avoided, thereby extending the printbar life.
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Fuller Benjamin R.
Nguyen Thinh
Xerox Corporation
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