Abstract: Positive form overlays are used to make composite images with a positive mode xerographic printer having a laser scan exposure mechanism. The laser scan or electronic exposure mechanism uses an oscillating galvanometer mirror to sweep a scanning spot over a cylindrical shape photoconductor. The xerographic processor includes a transfer drum able to recycle a sheet relative to the photoconductor to transfer at least two sequentially generated xerographic toner images to the same side of the same support in registration. One image is made in response to electronic signals and the other from the positive overlay thereby yielding a composite toner image.

Abstract: Reproductions of originals are obtained electro-photographically by exposing a charged photoconductor sequentially to at least two electro-optically regulated laser beam exposures, each exposure representing a separate color component of the original. Full color reproduction is possible.Alternatively a laser beam exposure may be accompanied, preferably substantially simultaneously, by exposures from either an opaque original or a transparency or both.