| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synthetic resin cap which can be easily twisted, prevent any defective twisting, and reduce the material and the cost. <P>SOLUTION: The cap comprises a top plate part 2 and a cylindrical part 3 suspended from a circumferential edge thereof, an annular inner seal projection 12 fitted in a vessel mouth part 20 is formed on an inner surface of the top plate part 2, and a notch 14 is formed in a lower part of the inner seal projection 12. <P>COPYRIGHT: (C)2003,JPO |
