Apparatus for forming superimposed images

An image forming apparatus for forming superimposed images, comprising:

• an image holder for holding a plurality of images;
• a moving member for assisting in transfer of the images formed on said image holder, said moving member having a region for receiving a recorded registration mark;
• a light source for illuminating the registration mark from the one side of said moving member;
• a detector mounted on a side of said moving member opposite said one side for detecting a shadow of the registration mark when illuminated by said light source, and for producing a detection signal representing the detection;
• and
• adjusting means for adjusting the position at which at least one of said plurality of images is held by said image holder in accordance with the detection signal produced by said detector.

An image forming apparatus for forming superimposed images, comprising:

• an image holder for holding a plurality of images;
• a moving member for assisting in transfer of the images formed on said image holder, said moving member having a region for receiving a recorded registration mark;
• a detector for detecting the registration mark recorded at said region and for producing a detection signal representing the detection;
• adjusting means for adjusting the position at which at least one of the plurality of images is held on said image holder in accordance with the detection signal produced by said detector;
• and
• removing means for removing the registration mark from said region after said detector detects the mark.

An image forming apparatus for forming superimposed images, comprising:

• a plurality of image holders each respectively for holding an image;
• a plurality of image forming means each respectively for forming an image on each said image holders;
• and
• adjusting means respectively for adjusting all except one of said image forming means, and thereby for adjusting the position at which at least one of the images is formed on said image holders by said image forming means except the image formed by said one of said image forming means to prevent misregistration of the images on each of said image holders by all of said image forming means.