| 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 the supporting disk 11 and the pusher 13 of each rotarty disk 1, 1. As both side parts of the film F0 are supported, the disks 1, 1 are rotated in the direction of the arrow between the intended ranges of their lower halves. When the film F0 reaches the termination of the stretching range, the supporting disk 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 a simple device. |
