| 摘要 |
A film (1) wound around a core (2) and having zipper teeth (3), (4) of a resin constituting interlocking means fused continuously to the film along both edge portions thereof, the film (1) being wound diagonally around the core (2) to form a roll film. This roll film can be set in an automatic bag packing machine without any troublesome operations. During a rewinding operation, the film turns smoothly, so that the film can be payed out at a constant speed. This enables zipper-carrying bags to be formed efficiently. |
