| 摘要 |
PROBLEM TO BE SOLVED: To provide an expanded can having small restriction in surface decoration and sufficient strength since a can torso is thinner than ever and an external surface of the can torso is a smooth surface. ! SOLUTION: A can torso 1 is subjected to expansion processing of expanding its outer diameter over a whole circumference, and a maximum external diameter portion 8 larger than an original diameter before the expansion processing is formed in the center portion in an axial direction of the can torso 1, and a first continuous portion 9 continued from the maximum external diameter portion 8 to an original diameter portion 5 having the same external diameter as an original diameter on one end side of the can torso 1, and a second continuous portion 10 continued from the maximum external diameter portion 8 to an original diameter portion 6 having the same external diameter as an original diameter on the other end side of the can torso 1 are formed in such a shape that the external surface smoo |
