| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve sealing properties of a lid closing condition between a cap A closed again and a bung hole part B with a pull ring after the bung hole part B is opened by the pull ring in a bung after opening. <P>SOLUTION: In a plastic bung with an injustice opening preventing function, a ring-shaped inner seal part 1a tightly fittable to the inner periphery of the upper end part 13b of a cylindrical part 13 of the bung hole part B is provided downward on the lower face of the top part 1 of the cap A. A space part 1b for reinforcing a lid closing sealing property wherein the upper end part 13b can be fitted in closing the lid again between the cap part A and the bung hole part B is provided above the upper end part 13b of the cylindrical part 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
