| 摘要 |
PURPOSE:To detect a film inflating position with high accuracy by providing a control processing means raising and lowering a sensor head by controlling the driving of a rising and falling drive motor and taking in the position data corresponding to the electric signal outputted from a position sensor when the edge of the film at the film inflating position is detected by a photoelectric detector. CONSTITUTION:When a film is detected by an upper photoelectric detector 2 but not detected by a lower photoelectric detector 2, it is judged that the edge of the film at a film inflating position is detected and the position data sent from a position at that time is taken as the film inflating position. When the edge of the film can not be detected by the photoelectric detector 2 of a sensor head 1 and the film is not detected by both photoelectric detectors 2, a rising and falling drive motor 4 is driven to control the sensor head 1 so as to raise the same. The sensor head 1 is raised while it is judged whether the edge of the film is detected by the photoelectric detectors 2 and stopped when the edge is detected. |
