| 摘要 |
PROBLEM TO BE SOLVED: To accurately heat-seal even a plastic film 2 of polyethylene which is vulnerable to tension and heat in a bag making machine for producing a plastic bag. SOLUTION: The plastic film is fed continuously by a feed roller 1, and sealers 3 are arranged at intervals in the feed direction of the film. When the film is heat-sealed, each sealer is moved in the feed direction of the film, a pulling mechanism 9 is arranged between the sealers, and the film is attracted partially and pulled. |
