| 摘要 |
PROBLEM TO BE SOLVED: To provide a tightly-sealed cap with a gasket.SOLUTION: A cap 4 with a gasket includes a cap body 1 having a screw thread 1d, and is configured in such a manner that a gasket 2 formed of a resin different from that of the cap body 1 is formed on the rear surface of the top plate 1a of the cap body 1, a corner R-surface on the lower surface side of the screw thread 1d forms an R-surface larger than the corner R-surface on the upper surface side of the screw thread 1d, and a gap is formed between the outer peripheral wall of the gasket 2 and the rear surface of a sidewall 1b of the cap body 1 near the top plate 1a. |
