| 摘要 |
PROBLEM TO BE SOLVED: To further effectively detect erroneous mounting of a press plate by attaching start or end mark to other side end and attaching a data mark between identification areas with ink different from printing element and non- printing element color in a data identification area having one row, a plurality of digits partitioned to desired position of the plate. SOLUTION: A cylinder position identification code is printed in a different color from colors of printing element surfaces of press plates 3A to 3D on one row, a plurality of digits at a desired position of the surfaces of the plates 3A to 3D such as, for example, an upper side. In the area, a start mark, intermediate mark and end mark are, for example, sequentially provided from left side. After the plates 3A to 3D printed with data marks of the codes are mounted on a plate cylinder 1, a drive button of a printer is pressed. Then, the cylinder 1 is slowly rotated. At that time, when the start mark 23 is detected by a start position reading sensor 25, a television camera 19 is operated to image the data marks of the codes of the plates 3A to 3D so that ink of the similar color to that of the element part is not recognized. |
