| 摘要 |
<p>PROBLEM TO BE SOLVED: To simply inspect the bottom of a can by tapping, and to easily inspect inner pressure of the can by forming a step part connected with an annular recessed part on the inside of the annular recessed part in the can wherein an annular projected part is formed on the bottom of the can and the annular recessed part is formed on the inside of the annular projected part. SOLUTION: In a can wherein an annular projected part 2 projected outward in the axial direction of the can is formed on the bottom 1 of the can, an annular recessed part 3 with an arc-shaped crosssection connected with the annular projected part 2 is formed on the inside of the annular projected part 2 on the bottom 1 of the can and the inside of this annular recessed part 3 is made to a flat panel part 4 under unloaded condition. In addition, a step part (a step difference part) 5 connected with this annular recessed part 3 is formed to prevent the panel part 4 from being expanded by an inner pressure. It is possible to decrease amt. of expansion of the panel part 4, to decrease natural frequency after removing inner pressure and to increase slope of a calibration curve by combining the annular recessed part 3 with an appropriate dimension with the step part 5 like this.</p> |
