Abstract: A photocopying machine is provided with a repeat mechanism. After the original material to be copied has left the exposure station a feed mechanism is provided by optionally returning the original material to the exposure station for making of a second copy. Two return mechanism paths are provided for originals of different length.

Abstract: Apparatus for controlling cut-off of paper from a web thereof fed through a blue print machine or the like, includes a main shaft driven by the drive structure of such machine, a threaded sleeve is mounted on said main shaft and is resiliently restrained against rotation. A plier-like pair of jaws is received in the threads of said sleeve for displacing said sleeve axially when it is clutched to said main shaft by an electromagnetic clutch. Holes are provided in said sleeve which are detected optically to operate in the generation of a control signal to effect cutting of said web.