Ink jet printing apparatus
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United States of America Patent
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Apr 30, 2013
Grant Date -
Oct 22, 2009
app pub date -
Apr 6, 2009
filing date -
Apr 21, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An air pump is driven to supply air via an air supply tube to a sub tank, by which a predetermined quantity of the air is mixed inside the sub tank via a gas-liquid separation membrane. Next, a carriage is swayed to agitate the ink by using the air mixed inside the sub tank. Then, the air pump is driven to discharge the air inside the sub tank via the gas-liquid separation membrane. In the above-described agitating motions, since the air utilized for the agitation is discharged from an ink tank after agitation processing, it is possible to prevent the air from remaining inside the ink tank to inflate, thereby adversely influencing the pressure relationship with a printing head.
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