| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sealing device that facilitates peeling in use while sufficiently securing seal strength and that prevents sealability from being decreased by foreign matter, a sealing method, and a sealed container.SOLUTION: A sealing device comprises an annular inside seal part 111 and an annular outside seal part 121, which heat a sealing film F in the state of pressing it against a peripheral edge 151 of an opening of a container 150. A cross-section of a pressing surface 112 of the inside seal part 111 is formed in an arc shape with a radius R1, which has a center point on a center line in a width direction, and the width of the inside seal part 111 is less than twice the radius R1.</p> |
