| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a hermetically sealed bag for microwave oven cooking of an improved standing pack relieving steam and preventing the leakage of liquid content. SOLUTION: Both side edges 1a' and 1b' of a film are mutually joined together in a butt-state and laterally brought down to be held between an underlay platen 14 and a heat sealer 11 for a film butted part having a specific shape to apply a heat seal 15a and shoulder seals 15b and 15b to the film butted parts 1a' and 1b'. A bottom seal 16 is formed to the loop-shaped folded-back on the side of the bag bottom of a laminated film 1, two punched holes 1c and 1c on a horizontal line passing a cut mark (m) are overlapped, and a side seal 18 is provided by a heat sealer 17 for side seal. Thereafter, the loop-shaped folded-back end edge on the bag opening side of the laminated film 1 is cut off by a cutter 19 for forming bag opening to provide an opening 21 of a bag. |
