| 摘要 |
PROBLEM TO BE SOLVED: To produce a bag with a port without generating a defective seal such as pinholes in a heat seal. SOLUTION: At least one port molding tool 4 is inserted into the opening part 4a of the bag 2 formed from a laminated film. The opening part including a round rod 4 is enclosed by molds 10 and 11 having port molding spaces 10a and 11a, a resin is injected into the spaces 10a and 11a of the molds, and the port 3 having at least one pouring port 3a is molded integrally on the surface of the bag 2. |
