PRINTED COPY SHEET NUMBER READ-OUT DEVICE

摘要

A printed copy sheet number read-out device adapted for use with an offset printing machine which permits one master plate after another to be automatically mounted on its master cylinder. Each master plate to be duplicated by this machine is provided in one marginal portion thereof with a plurality of sets of timing marks each set representing the column of the number of copy sheets to be printed and data marks each being provided for one set of timing marks and placed above one timing mark of each set which represents the particular numeral in each column. When one of such master plates is mounted on the master cylinder, the marks are automatically read by read-out means provided in the printing machine and duplication of the particular master plate is automatically terminated when a predetermined number of copy sheets have been printed.