Container bottom wall reforming apparatus and method

Details Container bottom wall reforming apparatus and method Container bottom wall reforming apparatus and method

1992-05-01

1994-08-30

Larson, Lowell A.

Metal deforming

Process

Deforming sheet metal

72 94, 72402, 413 69, B21D 5126

Patent

active

053416678

ABSTRACT:
A container is formed with a bottom wall comprising a central panel and a resting radius formed from an annular wall depending downwardly from the central panel periphery and then outwardly and upwardly to join the container side wall. A method is disclosed which reduces the resting radius by tightening the curvature thereof through deformation of the outer annular wall so that the resting radius is better able to resist eversion under the influence of pressure within the container. The outer wall is deformed by radially inward flexing of plural fingers which are cammed radially inwardly into contact with it through a cam follower arrangement which also controls a can support member to (1) locate the bottom wall in a first position between the reforming fingers and supporting anvil, and (2) in a second, elevated stripping position where the container is removed from the apparatus. The container bottom wall is preferably reformed during necking-in of the container open end.

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