| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap having a pull ring in which no permeation occurs from an annular thin walled weakening line even if a stored content showing a high permeation state is stored in a container, distillation can be carried out positively at the time of aseptic charging and further the cap can be easily opened through the pull ring. SOLUTION: There is provided one piece cap in which a lid segment 200 is connected to one side of a circumferential wall 110 of a spout 100 through a hinge 11 in such a way that it can be opened or closed, and a sealing plate 120 of the spout is opened by a pull ring. An annular slit 121 is arranged from an upper surface at an opening planned position of the sealing plate inside a discharging cylinder 130 of the spout to form an annular thin walled weakening line 122 at a lower surface. A barrier laminated film 300 having a larger outer diameter than an outer diameter of the annular thin walled weakening line is heat melted by an insert injection molding method to cover the annular thin walled weakening line. A pull ring 124 is connected to an extremity end at one side of the upper surface near inside the annular slit, and a supporting column 123 having a reinforcing rib 125 is arranged vertically at a lateral central position of a rear surface. |
