Patent ID: 7083249

Claim:
An ink jet printer, having a printing mechanism with a reciprocal carriage mounting an ink jet head and a sheet feeding mechanism, that performs printing on a recording medium using the ink jet head by moving the recording medium and the ink jet head relative to each other, wherein a recording medium moving direction is referred to as a sub-scanning direction and a direction perpendicular to the sub-scanning direction is referred to as a main scanning direction, comprising the ink jet printer having values of tolerances of A 1 , B 1 , and C 1 that contribute to determination of ink droplets landing accuracy having relationships such that A 1 ≦B 1 and A 1 ≦C 1 , where A 1 : a deviation of a sheet feeding amount in the sub-scanning direction obtained by a dot line length of an average value of the sheet feeding amount in the sub-scanning direction, from an ideal value; B 1 : a maximum value of a deviation in the sub-scanning direction between same color dots; and C 1 : a maximum value of a deviation in the main scanning direction between the same color dots.