Ink-jet head and ink-jet type recording apparatus
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United States of America Patent
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-
Feb 13, 2007
Grant Date -
Dec 30, 2004
app pub date -
Jun 15, 2004
filing date -
Jun 25, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ink-jet head has deformable ink chambers formed in a piezoelectric ceramic plate and communicating with nozzle openings for ejecting ink from the chambers in response to voltage drive waveforms applied to electrodes on side walls of the chambers. A drive waveform generator selectively applies to the electrodes a first drive waveform to eject an ink droplet from a nozzle opening or a second drive waveform for vibrating a meniscus of the ink to the extent that no ink droplet is ejected from the nozzle opening. By vibrating the ink meniscus, thickening of ink in the nozzle openings can be suppressed without a complicated voltage control.
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