Inkjet head unit and inkjet apparatus
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United States of America Patent
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Apr 22, 2014
Grant Date -
May 2, 2013
app pub date -
Sep 12, 2012
filing date -
Nov 1, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
There is provided an inkjet apparatus capable of adjusting pressure in an inkjet head to a predetermined slightly negative pressure without limitations on the installation location of a pressure adjustment unit and without stopping the flow of liquid. The inkjet apparatus includes an inkjet head for discharging ink droplets and an ink tank for retaining liquid to the inkjet head. The inkjet apparatus further includes a liquid feeding unit communicating with the inkjet head and configured to feed the liquid in the ink tank to the inkjet head by reducing the pressure in the inkjet head, an open-close valve configured to open or close a flow channel connecting the inkjet head and the liquid feeding unit, and a pressure adjustment unit configured to open or close the open-close valve according to a pressure difference between inside and outside of the flow channel to adjust the pressure in the inkjet head.
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