Color image recording apparatus.

摘要

A color image recording apparatus (1) comprises edge detection means with image sensors (11a, 11b) for detecting longitudinal edges of electrostatic recording paper (4), and mark detection means (11a, 11b) for detecting registration marks (12) formed at an equal pitch along the edges of the recording paper (4). Both edges are detected at a first pass thereof through the edge detection means (11a, 11b), and the detected output is stored in memory (15 to 18). During each of second and subsequent passes, detected data is compared with the initially stored data to correct for expansion and shrinkage of the recording paper (4). Oblique motion of the recording paper (4) is detected from the timing difference between registration marks (12) formed on opposite sides of the recording paper (4), which timing difference is used to change line recording timing. A single correction is periodically repeated and changed until completion of the correcting for oblique motion of the recording paper (4) as well as expansion or shrinkage thereof, hence ensuring an exact positional coincidence of the individual color images.