| 摘要 |
<p>A method and device for making a perforated film, in which a film material (3) is clamped between a cutter roll (1) having blades (12) and a receiving roll (2), said blades (12) are pressed to the film material (3), and the film material is perforated to have slits with at least one of said cutter roll and receiving roll driven. Stoppage instructing signals slows down the device, slowing of the device to a specified low speed is detected, and, when the device draws closer to stoppage, a signal for notifying the stoppage is issued, and the receiving roll (2) is displaced so that the cutter roll may be detached from the film material.</p> |
