| 摘要 |
PROBLEM TO BE SOLVED: To suggest a hinge cap capable of preventing lid opening in accordance with rise of internal pressure to be concerned in heating and filling of content.SOLUTION: A hinge cap 1 is provided with: a cap body 2 having a top surface wall 4 which covers a mouth 51 of a container 50, and fixedly held to the mouth 51; a lid body 3 oscillatably connected to the cap body 2 via a hinge 8; and a seal cylinder 12 which fluid-tightly contacts an extraction cylinder 5 erecting from the top surface wall 4 of the cap body 2, on the rear surface of a top wall 9 of the lid body 3. An annular groove N which allows an inner area of the seal cylinder 12 on the top wall 9 to displace in the vertical direction according to pressure is provided on the top wall 9 of the erected lid body 3 along the inner peripheral edge of the seal cylinder 12. |
