| 摘要 |
<p>PURPOSE:To avoid the cutting of a film while the film is drawn out, by actuating a cutting means only in case the length of the drawn-out film is within the storage value and also the film rear edge is detected. CONSTITUTION:When a film 1 is drawn out completely and the tension applied to the film 1, a flange part 12 of the partone moves in the film take-up direction. At the same time, a rotary lever 15 turns in direction B, and a switch 16 is turned on to produce the rear edge detection output. Then an output is obtained at a film extent detecting circuit 18 in the range of pulses corresponding to the lengths of various types of films, and this output is applied to a film rear edge deciding circuit 19. Meanwhile the circuit 19 actuates a cutter means 6 via a cutter drive circuit 20 only when the switch 16 is turned on by the tension of film.</p> |
