| 摘要 |
PURPOSE:To separate a feed part from a copying machine frame and to copy a thick original on the same exposure surface by providing a control circuit which controls a process means for forming a copy image through the 2nd input means. CONSTITUTION:A transistor Q20 or Q21 outputs a positive pulse P2 after the operation of a one-shot circuit. When an original detecting element PHA2 or PHB2 of a setter part detects an original, Q30 or Q31 turns off to trigger the one-shot circuit of Q32 or Q33. If the original is not at the original detection position of the setter part before the pulse P2 is sent out, an H-level signal is supplied to the input CLOCK of Q40 or Q41 through the OR circuit of Q25 or Q28 because the output -Q of Q32 or Q33 is at H. Then, Q40 or Q41 flows a current to a light emitting diode PLJAMA2 or PLJAMB2 connected by a D type edge trigger flip-flop circuit to display a jam state. Further, it is connected to an input of an OR circuit Q48, so motors M1 and M2 are powered off. |
