Patent ID: 6325489
Filing Date: 2001-12-04
Classification: B41J

Abstract:
An ink-jet printing apparatus that moves in a main scanning direction an ink-jet recording head in which a plurality of nozzle opening arrays, through which different color ink droplets are independently ejected, are arranged in said main scanning direction, and that feeds a recording medium in a sub-scanning direction when one scan is completed, said recording head comprising a plurality of nozzle openings for each of said nozzle opening arrays, wherein:said nozzle openings are arranged at intervals of at least four or more print-pitches in said sub-scanning direction;said nozzle opening arrays being subjected to ink droplets ejection in a single main scanning movement of the recording head are divided into at least two groups;said nozzle openings arrays that belong to each of said groups being positioned along the same line in said main scanning direction;said groups being shifted away from each other at least two print-pitches in said sub-scanning direction; andsaid recording head uses an interlaced system to print color data.