| 摘要 |
PROBLEM TO BE SOLVED: To provide a plug type synthetic resin container lid capable of being surely attached to a neck of a container with a relatively small plugging force, free from the need of an additional operation such as cutting, after molding, and having no possibility of flight of the container lid owing to that a pressure is released at an initial stage of opening when the interior of the container is in a pressurized state.SOLUTION: A plurality of thin wall reverse pieces 16 connected to a boundary area between the outer peripheral surface of a skirt wall 6 and the upper surface of a top wall, or a portion above the upper edge of a cylindrical seal in the outer peripheral surface of the skirt wall, and extending upward from a bottom edge over the top wall are arranged at intervals in the circumferential direction. A cylindrical binding wall 18 is connected to the upper edge of the thin wall reverse piece, and an opening ring 26 surrounding the binding wall is arranged. The binding wall is formed with a pair of scores or slits extending in a central axis line direction at an interval in the circumferential direction, and the outer peripheral surface of the binding wall is connected to the inner peripheral surface of the opening ring through a projection 24 positioned between the pair of scores or slits. At least one upper edge of the thin wall reverse pieces is connected to the binding wall between the pair of scores or slits. |
