Patent ID: 8740328

Claim:
An inkjet printer, comprising: an inkjet head configured to discharge ink droplets from nozzles formed in an ink discharging surface thereof; a head scanning unit configured to move the inkjet head facing a recording medium to reciprocate along a first direction, the first direction being parallel with the ink discharging surface of the inkjet head; and a pattern-printing control device configured to control the inkjet head and the head scanning unit to print a gap level pattern, which is configured to exhibit fluctuation of levels of a gap between the ink discharging surface and the recording medium along the first direction to be detectable, on the recording medium, wherein the pattern-printing control device controls the inkjet head and the head scanning unit to print the gap level pattern including a plurality of unit patterns, in each of which a first linear pattern and a second linear pattern intersect each other, aligned along the first direction, by: manipulating the inkjet head to move in a first orientation along the first direction and to discharge the ink from the plurality of nozzles to form a plurality of first linear patterns, which are formed to intersect the first direction, along the first direction while being moved; and manipulating the inkjet head to move in a second orientation along the first direction and to discharge the ink from the plurality of nozzles to form a plurality of second linear patterns, which are formed to intersect the first linear patterns respectively at a same angle, along the first direction while being moved.