| 摘要 |
Even when a pressurizing operation is performed, degradation of the quality of a printing head due to wiping of a nozzle surface is suppressed. In an ink jet printing apparatus including a printing head, an ink tank, a first pump arranged in an ink supplying path for supplying ink from the ink tank to the printing head, a second pump arranged in an ink collecting path for collecting ink from the printing head to the ink tank, a switch valve arranged between the printing head and the second pump, and a cleaning mechanism, by driving the first pump in a state where the switch valve is closed, the ink is discharged from the nozzle row, and after driving of the second pump in a state where the switch valve is opened, the cleaning mechanism is caused to clean the printing head.
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