| 摘要 |
PROBLEM TO BE SOLVED: To provide a holding tool for obtaining a consistent sealing effect by solving a problem that the sealing property should be kept by curving a sheet body, resin sheets of different shrinkage factors should be superposed in a multilayered manner for a means of that purpose, conditions for producing the sheet are limited, in addition, the shrinkage factors are largely varied according to the forming condition, and the predetermined curved shape cannot be obtained.SOLUTION: A holding tool 7 holds an opening 4 of a bag body in an opening/closing manner. The holding tool 7 includes a holding part for pressing a surface of the bag body, and a non-holding part of the holding tool 7. |
