摘要 |
In an image forming apparatus for overlying plural images eg component colour images, in succession at different image transfer stations 211C, 210 onto a recording sheet, 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 at each image transfer station across the recording sheet (Figs. 15 and 16), for measuring positional errors of the predetermined images and for regulating the start timing of image formations in dependence thereon. …<IMAGE>… |