| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cap having an internal plug which is improved so that the liquid-tightness when the cap is closed is further increased. <P>SOLUTION: This cap having an internal plug has the internal plug (1) which is attached to the mouth of a bottle (B), an over cap (2) which is placed on the internal plug, a sliding valve (8) which slidably comes into contact with the internal plug, and engaging means (13 and 18) between the over cap and the sliding valve. Accompanying an attaching/detaching motion of the over cap to/from the internal plug, the sliding valve performs an opening/closing movement for this cap having the internal plug. For the cap having the internal plug, a flange part (23) which can closely come into contact with the end surface in the axial direction of the internal plug is formed on the sliding valve. At the same time, on respective confronted surfaces of the internal plug and the over cap, annular protruding parts (5 and 14) which can closely come into contact with each other when the cap is closed are formed. Thus, sealing when the cap is closed is performed at a plurality of parts, and the liquid leakage preventing property is increased. <P>COPYRIGHT: (C)2004,JPO |
