| 摘要 |
PROBLEM TO BE SOLVED: To provide a virgin cap in which a virgin part is not left behind on a bottle mouth part in a tamper-free manner, and a bridge of an easily breakable part is hardly broken during the closing and easily broken during the opening. SOLUTION: A cylindrical ring having a longitudinal slit is continuously provided on an opening part of a cap body via an easily breakable part and a non-breakable connection part, a recessed part or a projecting part is formed in its vicinity, a movable stopper of the recessed part or the projecting part is provided on the cap body, and the recessed part or the projecting part and the non-breakable connection part are located on both sides of the longitudinal slit across it. When the cylindrical ring is engaged with a bead of a bottle by screwing, the force of expanding the longitudinal slit when closing a cap is applied to the stopper directly or via a transverse bridge, the longitudinal slit is not expanded, and the easily breakable connection part to connect the cap body to the cylindrical ring is not broken. When the cap body is turned in the cap opening direction, the easily breakable connection part between the cap body and the cylindrical ring is broken while the non-breakable connection part is not broken, and the cap body and the cylindrical ring are detached together from a bottle mouth. COPYRIGHT: (C)2006,JPO&NCIPI
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