METHOD FOR CUTTING BARRIER FILM

摘要

PROBLEM TO BE SOLVED: To easily and presentably cut an excess of a barrier film without increasing a process. SOLUTION: A lid 3 with a barrier film 8 protruding out of the lid with the wide barrier film 8 heat-fused is put over an opening 6 of a container body 2 so that the barrier film 8 is in contact with an opening rim 9 of the container body 2, and ultrasonic vibration is applied from above the lid 3 to stick the lid 3 to the opening rim 9 of the container body 2, while an excess 13 of the barrier film 8 is cut from a trim edge 12 of the lid 3.