Patent ID: 8360570

Claim:
An inkjet printer comprising: an inkjet head for ejecting ink; a conveying unit which conveys a recording medium to the inkjet head; a positioning unit which positions a recording medium at a recording position to which the ink is ejected from the inkjet head; a platen which supports the recording medium positioned at the recording position from an opposite side of the inkjet head; a heater which heats the platen at a position corresponding to at least an end portion of the recording medium positioned at the recording position; and a control unit which controls the heater to turn on and off; wherein the control unit determines a size of the recording medium conveyed by the conveying unit from among a plurality of size of recording media in a width direction orthogoal to a conveying direction of the recording medium by the conveying unit; wherein the heater includes a plurality of heaters provided at positions corresponding to end porition of the plurality of sizes of recording media positioned at the recording position in a width direction, respectively; wherein the control unit selectively turns on the heaters based on the size of the recording medium determined by the control unit; wherein the control unit determines whether a borderless printing command of controlling the inkjet head to eject ink up to the end portions of the recording medium is received; wherein the control unit turns on the heater when it is determined that the borderless printing command is received; and wherein the control unit does not turn on the heater when it is determined that a bordered printing command is received.