Ink-jet printing apparatus
AssigneeSeiko Epson Corporation
InventorHIRONORI ENDO
Life of this patent
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Abstract
A recording head is so designed that a plurality of nozzle openings for each of the nozzle opening arrays are arranged at intervals of at least four or more print-pitches in the sub-scanning direction, that the nozzle opening arrays are divided into at least two groups, that the nozzle opening arrays belonging to each of the groups are positioned along the same line in the main scanning direction, and that the groups are shifted away from each other at least two print-pitches in the sub-scanning direction. Dots of different groups do not contact each other during printing, and when printing for one scan line is completed, a recording medium is fed a number of print-pitches that corresponds to the nozzle opening count, so that a paper feeding distance error can be constant.
Claims8
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 which are arranged at intervals of at least four or more print-pitches in said sub-scanning direction, said nozzle opening arrays being divided into at least two groups, said nozzle opening arrays that belong to each of said groups being positioned along the same line in said main scanning direction, and said groups being shifted away from each other at least two print-pitches in said sub-scanning direction;
- and wherein said recording head uses an interlaced system to print color data.
Dependencies are inferred from the claim text.