| 摘要 |
PURPOSE:To inform the period of original removal possibility and to quicken copying work, by providing a sheet number setter setting the number of copies, and detector generating pulse signals through the detection of copies, and detector generating pulse signals through the detection of removal possible period of an original on a platen of a copying machine. CONSTITUTION:A detector 10 detects removal possible period of an original on a platen of a copy machine and generates a pulse signal. The pulse signal is differentiated at a differentiator 12 and fed to a counter 14. The counter value of the counter 14 is fed to a comparator 18 with the output of a number of copy setter 16, and when they are coincident, a comparator 18 outputs an output signal to a timer 20, which outputs a signal with duration for a specified time to a sound generator 22 to generate sound for the specified time. Thus, for example, possible original removal can be informed to the operator by means of sound just after the final copy is outputted, allowing to quicken the job. |
