| 摘要 |
PURPOSE:To prevent unnecessary copying operation by detecting a blank sheet of paper among originals, then, alarming or informing, etc. CONSTITUTION:At the entrance side of a platen, a sensor 9 consisting of many photodetecting elements corresponding to long-sized areas in the feed direction of originals 7 is installed to detect a blank sheet of paper among the originals 7-. On the said detection, an alarm is given by a buzzer, etc. Thus, the unnecessary copying operation of a blank sheet of paper other than the originals is prevented. |
