| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw cap which is not dropped or lost after opening. SOLUTION: This drop preventive bottle cap comprises a sealing ring formed at the bottom of the screw part of a bottle opening part and a screw cap jointed breakable with the sealing ring by a small joint. A spiral separation slit is formed in the skirt part formed at the bottom of the screw cap, and a string-like joint member is formed continuously in the slit connecting the cap and the ring roughly linearly in the cap turning direction. COPYRIGHT: (C)2006,JPO&NCIPI
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