| 摘要 |
PROBLEM TO BE SOLVED: To obtain an inflation film guide device for preventing the deterioration of the physical properties of an inflation film by reducing the take-up resistance in forming a fold of a gusset. SOLUTION: A gusset forming device 10 comprises a front member 10a whose widthwise dimension reduces toward a direction in which a tube-like film is taken up and a side member 10b integrally continuing from left and right end portions of the front member 10a and extending inwardly of the tube- like film in the direction in which it is taken up. Formed and provided in the front member 10a are, respectively, a plurality of air injection holes 18 for injecting air toward the tube-like film and a plurality of rollers 16 rotatable in the direction in which the tube-like film is taken up when they are brought into contact with the tube-like film when it is taken up, while only the air injection holes 18 are formed in the side member 10b. |
