Patent ID: 8197043

Claim:
An ink jet printing apparatus comprising: a print head configured to perform printing by ejecting ink supplied from a first ink tank removably mounted in a printing apparatus main body; a second ink tank configured to be able to temporarily store, between the first ink tank and the print head, ink supplied from the first ink tank to the print head; a volume changing member configured to be able to change volume of the second ink tank; an atmosphere communication port configured to enable an interior of the second ink tank to communicate with atmosphere; and a driving mechanism configured to control changing of the volume of the volume changing member and opening and closing of the atmosphere communication port, wherein, the driving mechanism opens the atmosphere communication port and then the volume changing member reduces the volume of the second ink tank, and subsequently closes the atmosphere communication port and then the volume changing member increases the volume of the second ink tank, thus the ink accommodated in the first ink tank is supplied to the second ink tank.