Recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorSeiji Saito
Life of this patent
Estimating the term…
Abstract
A recording apparatus has M different color recording heads (i.e., M columns) which are disposed parallel to each other such that they extend perpendicularly to a main scanning direction and such that two adjacent recording heads are spaced apart by an L-dot interval from each other. At the same time, the M recording heads are offset from each other by l-dot intervals. Each recording head has N nozzles which are spaced apart by K-dot intervals from each other along the subscanning direction. The recording apparatus satisfies either the inequality lM.ltoreq.K (where K/N is an irreducible fraction) or inequalities lM>K and K(N-1)+1>l (where K/l is an irreducible fraction), thereby preventing double recording (so that only a single nozzle injects an ink onto a single point on a recording paper sheet) and omissions.
Claims11
Color image recording apparatus comprising a recording unit including first and second recording head groups for recording in first and second colors, respectively, each said group including N recording heads, and driving means for moving said recording unit relative to a recording medium in a main scanning direction to perform a plurality of main scans and in a subscanning direction;
- wherein:
- said N heads of each said group are substantially aligned in the subscanning direction at intervals of K resolution elements;
- said first group is displaced relative to said second group in the subscanning direction by at least one resolution element;
- and
- said driving means is adapted to provide relative movement to said recording unit and the recording medium in the subscanning direction a distance of N resolution elements for successive main scans.
Dependencies are inferred from the claim text.