Patent ID: 8485620
Filing Date: 2013-07-16
Classification: B41J

Abstract:
1. An inkjet printer that supplies ink in an ink tank to a printing head through a flow path and a filter provided in the flow path, and ejects the ink from an ejection port of the printing head to perform printing, the inkjet printer comprising: an on/off valve that is provided in flow path closer to the ink tank than the filter is to the ink tank; a negative pressure generating unit for generating a negative pressure to be applied to the ejection port; and a control unit that controls operation of the on/off valve and operation of the negative pressure generating unit, wherein the negative pressure generating unit can apply, to the ejection port, a first negative pressure that enables a bubble to pass through the filter, and a second negative pressure that has a smaller absolute value than the first negative pressure and is at a level such that it is difficult for the bubble to pass through the filter, and the control unit controls the negative pressure generating unit to apply the first negative pressure to the ejection port with closing the on/off valve, and then, after opening the on/off valve, controls the negative pressure generating unit to apply the second negative pressure to the ejection port.