| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cap closing device for a bottle having a cap prevented from coming off from a plug. <P>SOLUTION: The cap closing device for a bottle comprises a soft-plastic made cup-shaped plug 2 with a flange 2b, a hard-plastic made locking ring 5 fitted on the plug 2 from below and locked on the flange 2b and the cap 4 fitted on the plug 2 with the locking ring 5 fitted on the flange 2b; and the cap 4 is made of a hard plastic and has an internal circumferential face 6 to be fitted on the outer peripheral face of the ring body 5a of the locking ring 5 and also an annular contact end face 7 getting into contact with the upper end face of the ring body 5a and the upper end face of the plug 2. The cap 4 is connected with the plug 2 via the locking ring 5 with the upper end face of the ring body 5a of the locking ring 5 locked on the flange 2b plastic-welded and joined to the annular contact end face 7 of the cap 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
