| 摘要 |
PROBLEM TO BE SOLVED: To provide a can-top for improving pressure resistance performance to an internal pressure rise in a can body.SOLUTION: The can-top 1 comprises an annular groove part 3 formed so as to recess along the outer peripheral edge of a center panel part 2, a curl part 5 bent by including a tail end part of the can-top 1 and a chuck wall part 4 formed by being sandwiched between the outer peripheral edge of the annular groove part 3 and the inner peripheral edge of the curl part 5, and blocks up the opening end of the can body, and a curved part formed over the whole periphery in the circumferential direction and formed in a longitudinal-sectional circular arc shape, is adjacently arranged in a plurality in the chuck wall part 4, and among the adjacent curved parts, one curved part projects outside the can body, and the other curved part projects inside the can body, and the inner peripheral edge of the first curved part 10 continuously arranged on the outer peripheral edge of the annular groove part 3 is positioned on the bottom side of the annular groove part 3 more than the center panel part 2, and the first curved part 10 is formed so as to project outside the can body. |
