| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap which can be easily opened by a method wherein the sealing parts of an inner plug are made independent of each other. SOLUTION: In the cap C, an internal plug 4 made of a synthetic resin consists of an annular member 6 which is elastically fitted on the top end of a container mouth part 2, a cylindrical inside foot 10 which can be elastically deformed so as to be brought into close contact with the inner circumferential surface of the mouth part 2, and a cylindrical member 12 for injecting liquid which is coaxially connected with the inner side of the foot 10. A shell 5 made of a synthetic resin which closes a pour port 3 for stored liquid by means of the cylindrical member 12 consists of a shell body with a top wall 17 which presses the member 6 of the plug 4 against the top end of the mouth part 2, and a cylindrical shell side inner side foot 22 which is bought into close contact with the inner circumferential surface of the cylindrical member 12 while the foot 22 elastically deforms the cylindrical member 12 when the shell body is screwed on the mouth 2. |
