| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing structure for a lid, which ensures airtightness of a container, is easily to open or close the lid in a short time, and prevents without fail a foreign substance from entering via a packing. SOLUTION: In the sealing structure 10 of the lid that hermetically seals a container 70 filled with a powdery or granular substance and an inactive gas that is used to prevent the powdery or granular substance from rupturing the container 70, a first packing 29 is interposed between the opening 14 of the container 70 and lid 15 that covers the opening 14. Specifically, the first packing 29 is disposed on one side of the lid, which one side touches the powdery or granular substance. The packing 29 is sticky and strong in order to prevent the powdery or granular substance from leaking. A second packing 28, which is elastic and sealable, is disposed on the outside of the first packing 29. This prevents a leakage of powdery or granular substance form the second packing 28 from being mixed into the powdery or granular substance via the first packing 29. |
