Patent ID: 8727472
Filing Date: 2014-05-20
Classification: B41J

Abstract:
1. An image recording apparatus, comprising: an ink jet head ejecting ink from a plurality of nozzles; a carriage equipped with the ink jet head and reciprocating in a predetermined moving direction; a conveyance mechanism conveying a recording medium to which ink is ejected from the nozzles in a conveying direction perpendicular to the moving direction; and a control section controlling operations of the ink jet head, the carriage and the conveyance mechanism, wherein the ink jet head is provided with: the control section repeatedly executes a unit recording operation in which the carriage is moved alternately to the one side and to another side in the moving direction for n times, while ink is ejected from at least one of the plurality of first nozzles and the plurality of second nozzles and the conveyance mechanism conveys a recording medium in the conveying direction by a length of (1+mn)D1 (m is 0 or an arbitrary natural number) every time the moving direction of the carriage is inverted, the control section causes both the plurality of first nozzles and the plurality of second nozzles to eject ink at first movement of the carriage in which a direction of the first movement of the carriage is toward the another side or at last movement of the carriage in which a direction of the last movement of the carriage is toward the one side among n movements of the carriage, and the control section causes only the plurality of second nozzles to eject ink at movement of the carriage except for the first movement or the last movement among n movements of the carriage.