Patent ID: 11858681
Assignee: UNIVERSAL CAN CORPORATION
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A can body comprising:
a cylindrical part;
a neck part smaller than the cylindrical part in a diameter; and
a mouth part connected to the neck part, wherein
the mouth part comprises a curl part in which an end part of the mouth part including an edge is folded back outward in a radial direction and rolled up, said curl part being provided at an outer peripheral part of the mouth part,
on a vertical cross section parallel to an axial direction of the can body, the curl part is provided with:
a folded top part that is bent to protrude upward in the axial direction;
an outer peripheral-upper side bent part that is bent downward in the axial direction from an outer peripheral edge of the folded top part;
an outer peripheral side cylindrical part extending downward in a direction parallel to the axial direction from an outer peripheral edge of the outer peripheral-upper side bent part;
an outer peripheral-lower side bent part which is bent inward in the radial direction at an outer peripheral lower part of the outer peripheral side cylindrical part and convex diagonally downward in the axial direction;
a concave part which is connected to the outer peripheral-lower side bent part and concave downward in the axial direction; and
a curl end part which is connected to the concave part and includes the edge,

the outer peripheral-lower side bent part and the curl end part each have a convex part, respectively, which is convex downward in a direction parallel to the axial direction,
the concave part is located between the convex part of the outer peripheral-lower side bent part and the convex part of the curl end part,
a radius of curvature of an outer surface of the outer peripheral-lower side bent part is not less than 0.4 mm and not more than 1.2 mm,
a radius of curvature of an outer surface of the curl end part is not less than 1.0 mm and not more than 4.0 mm, and
a depth of the concave part in the axial direction measured from a line connecting top points of the convex part of the outer peripheral-lower side bent part and the convex part of the curl end part to a deepest part of the concave part is not less than 0.01 mm and not more than 0.30 mm.