| 摘要 |
In an image forming apparatus for overlaying plural images eg. component colour images, in succession at different image transfer stations 211C - 211K onto a recording sheet 1505, a downstream image overlay is controlled in timing by an upstream image overlay, in order to avoid positional aberrations in the superposed multiple images. Provision is made for forming predetermined images 1501G - 1501K at each image transfer station across the recording shoot, for measuring positional errors of the predetermined images and for regulating the start timing of image formations in dependence thereon. This timing correction operation is effected before the colour component image transfer operations. <IMAGE> |
