| 摘要 |
PROBLEM TO BE SOLVED: To provide a container part made of a metal thin plate, wherein a shoulder for connecting a mouth neck and a barrel, and a transition part from the shoulder to the mouth neck are not provided with a step or unevenness but formed with a gently sloping slant face. SOLUTION: In the container part 1 made of the metal thin plate integrally formed of the relatively large diameter cylindrical barrel 16 with an opening on one end, the shoulder 21 provided with a smooth slant face joining to the cylindrical barrel 16, and a relatively small diameter cylinder 41 joining to the shoulder 21, the transition part 45 from the shoulder 21 to the small diameter cylinder 41 is joined to the slant face in the shoulder having a center of curvature inside the container part 1 and the small diameter cylinder from the slant face, formed with a curved face which consists of other slant face having a center of curvature outside the container part and whose slope changes gradually, and the center of curvature of the other slant face is equal to or larger than the small diameter cylinder.
|
