An image forming apparatus using a plurality of laser beams having the same characteristic in order to form a predetermined color image. The predetermined color image consists of a plurality of image colors. The laser beams are shifted with respect to each other in a vertical scanning direction by a...http://www.google.fr/patents/US5294944?utm_source=gb-gplus-shareBrevet US5294944 - Color image forming apparatus having means for properly superimposing image colors on each other
Color image forming apparatus having means for properly superimposing image ...
