| 摘要 |
PROBLEM TO BE SOLVED: To provide a package with a check valve such that a fluid passing through a valve passage opens the valve and excellently passes when flowing forward, and a manufacturing device therefor and a manufacturing method therefor.SOLUTION: A check valve 10 made of a sheet is sandwiched between a top packaging sheet 22 and a reverse packaging sheet 23 constituting a package, and fixed with a transverse seal 41. At positions including the transverse seal 41, dents 50 are made on the top packaging sheet 22, reverse packaging sheet 23, and check valve 10. The dents 50 are formed by deforming the top packaging sheet 22, reverse packaging sheet 23, and check valve 10 to at least one of the top and reverse sides with a male die 67 and a receiving die 68. |
