Liquid-droplet jetting apparatus
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United States of America Patent
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Jul 7, 2009
Grant Date -
Jun 21, 2007
app pub date -
Dec 15, 2006
filing date -
Dec 16, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A liquid-droplet jetting apparatus such as an ink-jet printer makes a meniscus of an ink in a nozzle vibrate by applying a no-jetting drive pulse which does not jet the ink. An operation of outputting two no-jetting drive pulses in one cycle is repeated for 100 to 150, and then stopped for 100 to 150 cycles. A pulse width Tp of the no-jetting drive pulses, an interval Tw between two no-jetting drive pulses, and a time AL in which a pressure wave in an ink channel is propagated one way are set to be in a range 0.1 AL≦Tp≦0.2 AL, and 0.2 AL≦Tw≦4.5 AL. Accordingly, it is possible to prevent assuredly, thickening of a liquid such as an ink in the nozzle, and to reduce a generation of a defect in jetting of a liquid droplet.
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