| 摘要 |
PURPOSE: To make the detection value of a register mark detector constant. CONSTITUTION: A registor mark detector 7, an encoder 6 detecting the rotary position of a plate cylinder, a gate generator 11 indicating a predetermined register mark, peak value memory means 12, 13 storing the peak value of the detection value of the register mark in the gate and an operator 18 outputting the value obtained by dividing the register mark detection value in the gate by the peak value stored in the memory means 13 are provided. |
