Patent ID: 8789918

Claim:
A liquid ejection apparatus comprising: a print head configured to eject liquid from ejection ports; a first reservoir configured to reserve liquid to be supplied to the print head; a second reservoir provided between the first reservoir and the print head, and configured to reserve liquid to be supplied to the print head; a switching unit configured to switch between a first state in which the second reservoir does not communicate with atmosphere and a second state in which the second reservoir communicates with atmosphere; a cap configured to cap the print head; a suction pump configured to suction liquid from the print head by communicating with the cap and producing negative pressure in the cap; control means for controlling the switching unit, so as to switch the switching unit to be in the first state when performing a printing operation to a print medium by ejecting the liquid from the print head and so as to switch the switching unit to be in the second state when liquid is suctioned from the print head by driving the suction pump.