| 摘要 |
PROBLEM TO BE SOLVED: To reduce ink leakage from nozzle of an inkjet head.SOLUTION: An inkjet printing device 1 comprises: a printing part 2 that discharges ink from nozzles of an inkjet head while circulating the ink along a circulation passage; a pressurized space part to which positive pressure is imparted for circulating the ink along the circulation passage; a negative pressure space part to which negative pressure is imparted for circulating the ink along the circulation passage; a pressurization-side atmospheric opening passage, one end of which is connected to the pressurized space part and the other end of which is communicated with the atmosphere; a negative pressure-side atmospheric opening passage, one end of which is connected to the negative pressure space part and the other end of which is communicated with the atmosphere; a pressurization-side atmospheric opening valve that opens and closes the pressurized space part to the pressurization-side atmospheric opening passage; a negative pressure-side atmospheric opening valve that opens and closes the negative pressure space part to the negative pressure-side atmospheric opening passage; and a control part 6, when finishing the circulation of the ink, performs control so that the negative pressure-side atmospheric opening valve is opened after the pressurizing-side atmospheric opening valve is opened and then the pressurized space part and the negative pressure space part are opened to the atmosphere.SELECTED DRAWING: Figure 1 |
