| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the opening and closing force of a cap for a long time, by providing a spacer in which a belt-form recess is formed on the inside face side of the neck of a container body and forming two ribs at the external peripheral face of the cap in the position facing the spacer. SOLUTION: A spacer 2 in which a belt-form recess 2b is formed at the inside of the neck is arranged in the state a cap 3 is fitted into the inside of the neck 1 of a container body. One rib 32 of the cap 3 is inserted in the belt- form recess 2b of the spacer 2 and other ribs 31, 32 are positioned to contact the spacer 2. The appropriate length α or the rib 32 caught by the inner diameter (other positions except the belt-form recess 2b) of the spacer 2 provided with the belt-form recess 2b having about 0.15 mm depth, is about 0.1 mm. In this way, the opening and closing force of the cap can be stabilized for a long time. |
