Patent ID: 9132657
Filing Date: 2015-09-15
Classification: B41J

Abstract:
1. A printing apparatus comprising: a print head that ejects ink for printing; an ink tank from which ink is fed to the print head; a first channel connected to the print head and the ink tank and configured to transfer ink in a supplying direction, in which ink in the ink tank is supplied to the print head, and in a direction opposite to the supplying direction; a gas-liquid separation tank arranged in the first channel; a second channel connected to the gas-liquid separation tank; a third channel connected to the print head; a pump connected to the second channel and also connected to the third channel; and a control unit, wherein the control unit is configured to cause the pump to generate a flow of ink or air in the first channel between the print head and the gas-liquid separation tank in the direction opposite to the supplying direction by raising pressure in the print head via the third channel, and wherein the control unit is configured to cause the pump to discharge air in the gas-liquid separation tank via the second channel.