| 摘要 |
PURPOSE:To perform high precision stretching with a simple device by moving widening toward the end and stretching material to be stretched along the outer peripheries of a pair of rotary disks arranged on the same plane. CONSTITUTION:Original film F0 is forwarded by nip rolls 4 into the heating chamber 2 and both side parts of this film F0 is supported between a supporting surface 11 and a pusher 12 to be formed on the outer periphery of the rotary disk 1. As both sides of the film F0 are supported, the disks 1, 1 are rotated between the predetermined ranges of their lower halves in the direction of the arrow. When the film F0 reaches the termination of the stretching range, the supporting surface 11 is separated from the pusher 13 to remove the film F0 from being supported. In this manner it is possible to stretch plastic film, etc. with high precision by using such a simple device. |
