| 摘要 |
PROBLEM TO BE SOLVED: To examine the inner pressure of a sealed can containing a content highly precisely. SOLUTION: An annular projection 13 which projects outward in the can axial direction is formed on the outer edge of the bottom 11 of the can 10. The annular projection 13 has a ground contact part 14 on the end thereof, and an inner peripheral wall 15 which is continuous with the ground contact part 14 radially on the inside thereof and rises in the can axial direction. A sloped wall 19 is formed continuously on the upper end in the can axial direction of the inner peripheral wall 15 to extend inward in the radial direction and upward in the can axial direction via a first recessed curving surface 18. On the sloped wall 19, a flat panel part 21 is formed continuously to extend radially inward via a second recessed curving surface 20. The diameterψA of the panel part 21 is 0.47 to 0.82 times of the diameterψB of a ground contact surface 50a. COPYRIGHT: (C)2005,JPO&NCIPI
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