Position control for recycled originals in a copying apparatus

Abstract

A position control system in a copying apparatus keeps an original positioned properly during multiple passes of the original through a transport path, for making multiple copies, by detecting the position of an edge of the original in the first pass, when the original is fed into the apparatus; setting a reference condition corresponding to the then existent side edge position; and in each subsequent pass of the original detecting its position and in the event of a deviation of the detected position from the position represented by the reference condition activating a position correcting device to displace the original to the latter position. In one embodiment, at least one detector to sense the location of a side edge of an original is reciprocated across the path of that edge during the first pass and, upon sensing the side edge, is stopped at a location corresponding to the position of the original; after which, in each ensuing pass of the original, the detector will issue a correcting signal if the position of the original differs from that for which the detector is positioned. In another embodiment, detectors arranged in a row across the path of a side edge of the original produce output signals which on the first pass of the original are stored in a memory, and on each subsequent pass of the original are compared with the memory condition, with resultant issuance of a correcting signal if the original is not in the desired position.