| 摘要 |
PURPOSE:To detect the erroneous setting of an aperture card and to avoid the useless copying, by providing a switch to detect the presence or absence of the aperture card plus a photosensor to detect the defective setting of the card on an aperture card setting tray. CONSTITUTION:A switch 4 that detects the presence or absence of an aperture card 3 on an aperture card setting tray 1 is provided on the tray 1 along with a photosensor that works when the card 3 exists on the tray 1 to detect the defective setting of the card 3. A mark 25 is put on the card 3 to be detected by the sensor 7. For instance, if the card 3 is set on an approach plate 2, a contact piece 5 of the switch 4 is energized to feed the detection signal to a controller. Then the sensor 7 works to confirm the correct setting of the card 3. After this, the card 3 is sent onto an original board 21. |
