Inkjet printhead having intermittent nozzle clearing
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United States of America Patent
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Jan 20, 1998
Grant Date -
N/A
app pub date -
Jul 29, 1994
filing date -
Jul 29, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus clears blocked nozzles in an inkjet primer printhead by placing the printhead in a position relative to a service station such that ink which is expelled from the nozzles is captured without reaching the medium upon which printing is to occur. Ink is expelled for a first time segment from each nozzle in a first pattern for a number of nozzle expulsions. Following the first time segment, a pause period is entered. Following the pause, ink is expelled in a second time segment from each nozzle in a second pattern for a second number of nozzle expulsions before the printer enters the print status mode.
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