Patent ID: 7845777

Claim:
An inkjet printer, comprising: a recording head having a plurality of nozzle arrays that jet a plurality of inks; an ink cartridge storing a plurality of inks; a buffer tank extending vertically, and having a plurality of ink outlets that supply the inks from the ink cartridge to the nozzle arrays; and a suction portion sucking the inks in the plurality of nozzle arrays, wherein of the plurality of nozzle arrays, nozzle arrays jetting a specific ink comprise a first nozzle array and a second nozzle array that are independent of each other, of the ink outlets of the buffer tank, a first ink outlet and a second ink outlet supplying the ink to the first and second nozzle arrays, respectively, are also independently disposed, upper parts of the first and second ink outlets communicate with each other through a communication portion in the buffer tank, the suction portion separately performs suction from the first and second nozzle arrays, and check valves allowing ink supply from the first and second ink outlets to the first and second nozzle arrays and inhibiting an ink flow in an opposite direction are provided in the first and second ink outlets, respectively.