| 摘要 |
A seal member (13) is heat sealed on the upper surface of a container opening (12), and a cap (15) is installed on the container opening (12). The cap (15) has a top plate (15a) covering the container opening (12) and also has, on the inner surface of the top plate (15a), an inner periphery projection (15e) located in the vicinity of a position more on the inner side than the inner peripheral edge of the container opening (12). The construction facilitates separation (separation for opening) of the seal member (13) with high sealing ability maintained, and prevents separation of the seal member (13) at the inner peripheral edge of the container opening (12) caused by a rise in pressure in the container. |
