there is disclosed an electrophotographic method and device for forming copies utilizing a reciprocating member movable for scanning an original document positioned thereon to form a latent image on a rotatable photosensitive medium . transfer material is fed in response to a feed signal produced by the reciprocating member in accordance with movement thereof . in one mode of operation , the photosensitive medium completes at least two rotations for each reciprocation of the reciprocating member .