| 摘要 |
PURPOSE:To enable the detect exactly the bad printing, by making total area of the pattern of printed matter as the testing object. CONSTITUTION:Arranging the optical detecting device 100 which inputs the picture information from the surface of printed matter 1 transferred with the rotation of the pressing cylinder 3, and rotary encoder 200 so that it links with the blanket cylinder 4, by means of supply of the detecting signal SI from the device 100 and of the output signal from the encoder to the treating circuit 300, the printed quality of the printed matter is judged and the error signal ER is developed at the time bad printing is detected. In this case, at the circuit 300, the testing by means of concentration level of the printed matter 1 is done treating differentially and integrally the detected signal of each light receiving element of the device 100. |
