Method and apparatus for forming a can shell

Details Method and apparatus for forming a can shell Method and apparatus for forming a can shell

1997-05-02

1998-10-20

Larson, Lowell A.

Metal deforming

With cutting

By composite tool

72348, B21D 5144

Patent

active

058230408

ABSTRACT:
A food can end or shell is formed from a thin metal sheet by blanking a circular disk from the sheet, gripping a peripheral portion of the disk, pressing a center portion of the disk upwardly relative to the peripheral portion, and forming upwardly projecting concentric beads within an annular portion of the disk. Thereafter, an annular chuck wall, countersink and crown portion are formed within the disk around the concentric beads. A downwardly projecting annular bead is formed within the bottom wall of the countersink and cooperates to resist buckling of the shell.

REFERENCES:
patent: 798530 (1905-08-01), Rehfuss et al.
patent: 4467933 (1984-08-01), Wilkinson et al.
patent: 5381683 (1995-01-01), Cowling

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