| 摘要 |
PURPOSE:To improve feeding precision by having a sprocket gear engaged to a press roll hole while being engaged to a perforation of a film, and pressing almost all of a periphery part of the film on a press roll when step feeding the film. CONSTITUTION:When a feeding roll 33 is driven, the film F interposed between the feeding roll 33 and a press roll 34 is step fed. On the other hand, the sprocket 31 engaged to the perforation P of the film F is rotated, following up the step feeding, the feeding direction of the film F is restricted in the specified direction, and tension is applied to the film F. The gear 31A of the sprocket 31 is engaged through the perforation P of the film F to a hole 32A of the press roll 32, and almost all of the periphery part of the perforation P of the film F is surely pressed by a press surface 32B of a press roll 32. Thus, the feeding precision of the film F can be improved. |
