| 摘要 |
PROBLEM TO BE SOLVED: To help a container keep a proper aritightness by a method wherein after an inner lid is put on a container main body, it is pressed toward the container main body by an external lid that is put on the inner lid and kept in a complete press-contact state. SOLUTION: An inner lid B to be fitted in an opening of a cup-shaped container main body A includes an inner lid main body 11, a tapered side plate 12 whose circumferential face comes in close contact with the tapered inner face of the opening of the container main body A, a circumferential flange 13 that stretches outward from the upper end of the tapered side plate 12 and a doughnut-shaped flange 14 that stretches inward from the middle height on the inner circumferential face of the tapered side plate 12. An external lid C includes an external lid main body 21 with a recessed part 23 to press the doughnut-shaped flange 14 from above and a side plate 22 that is fitted on the circumference of the opening of the container main body A. |
