| 摘要 |
PROBLEM TO BE SOLVED: To open a cap with a weak force while keeping a high airtightness of a container opening, by extending a folded tongue flap to the top face of the opening at the cylindrical lower end of the inner cover in which a cylindrical part extending down to the outside of the container opening is connected to a packing and providing a protrusion raising the packing with the uncapping at the external cover. SOLUTION: A pilferproof cap is constituted of a synthetic resin external cover 5 to which a pilferproof band 4 is connected to the cover body 2 screws in the male screw part (a) of the container opening 1 through a pluraliy of fragile bridges 3 and a synthetic resin inner cover 8 in which a cylindrical part 7 extending dot to the outside direction of the opening 1 is connected to the sealing packing 6 for the container opening. A tongue flap folding to the top face 1a side of the container opening 1 is extended to the lower end of the cylindrical part 7. A fixing member 11 fixing to an annular heave 10 of the lower part of the male screw (a) from the lower side is connected to the pilferproof band 4 and a protrusion 12 raising the packing 6 after the bridge 3 has been cut with uncapping of the cover body 2 is connected to the cover body 2. |
