Device for forming a smooth, i.e. in particular a crease- and undulation-free inwards convex flange-bearing edge-groove or -corrugation onto the open end of a metal hollow body or container formed in a press
ApplicationNo. 976138 filed on 11/10/1992
US Classes:72/356, With additional metal-deforming72/379.4, Container making72/393Embodying three or more tools (e.g., tube expander)
ExaminersPrimary: Larson, Lowell A.
Attorney, Agent or Firm
Foreign Patent References
International ClassB21D 051/26
AbstractMethods and apparatus for reforming drawn and ironed containers are disclosed. The invention permits improvements in bottom profiles by radially expanding arcuate segments against the inner leg that connects the bottom rim of the container to the center panel. The reforming introduced by the present invention permits containers to be constructed of a lighter gauge material without suffering from any loss in strength. The container being reformed is seated on a flat surface and a radially expanding die is used in conjunction with a tapered mandrel to reform the bottom profile. Most preferably, the reforming tool of the present invention is incorporated into a container necking mechanism.