Patent ID: 6712443
Filing Date: 2004-03-30
Classification: B41J

Abstract:
An ink jet recording apparatus using recording means provided with a first discharge port array and a second discharge port array having a plurality of discharge ports arranged to discharge ink, respectively, for recording by discharging ink to a recording medium from the discharge ports of said recording means, comprising:main scanning means for enabling said recording means to scan in a main scanning direction different from a direction of arrangement of said discharge port arrays relatively to the recording medium; sub-scanning means for enabling recording medium sub-scan from an upstream side to a downstream side in a sub-scanning direction and recording control means for repeating a recording operation to perform recording by discharging ink from said recording means during the scanning of said recording means by said main scanning means, and the sub-scanning by said sub-scanning means to record images on the recording medium, wherein said recording control means performs recording scans m times (m is a positive integer) in the main scanning direction to complete an image by the first discharge port array, and recording scans n times (n is a positive integer) in the main scanning direction to complete the image by the second discharge port array, while being provided with at least two kinds of sub-scanning amounts of the recording medium in the sub-scanning direction per main scan, and with respect to discharge ports to be used for recording in the first and second discharge port arrays, a distance between discharge ports which are positioned at upstream ends of the respective first and second discharge port arrays in the sub-scan direction is made equal to a length of a continuously conveying amount of (m+a) (a is a positive integer) times by combination of the at least two kinds of conveying amounts.