| 摘要 |
PURPOSE:To easily detect a printed matter by designated printing plate by providing a plate sensor which sends out a plate signal to a plate cylinder with plural plates and sending out a designation signal when an optional set value is counted. CONSTITUTION:For example, a plate cylinder has 4 the same plates, and its periphery is provided with 4 inked rollers of different four colors, by which plates are coated with 4-color inks. A detector 12 with those 12a, 12b, 12c, and 12d corresponding to each plate is fixed to the rotary shaft 11 of the plate cylinder, by which permitting detection by a sensor 13 for the surface of the plates. Also, every one rotation of the plate cylinder, one time-projection 15a passes by the neighborhood of a standard sensor 16 and a standard signal is generated. When set counter is set up on third plate, for example, a printing paper printed by the designated plate can be detected. |
