Pallet and method of production

Details Pallet and method of production Pallet and method of production

1984-03-08

1986-01-07

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72379, 108 533, B21D 2226

Patent

active

045627185

ABSTRACT:
A sheet metal workpiece is formed to have a plurality of relatively large diameter but relatively shallow cup-like depressions in a first draw operation, to have the shapes of the cup-like depressions changed in a subsequent draw operation and to form the base of the central cup-like depression into a secondary cup-like depression in a further draw operation.

REFERENCES:
patent: 2872887 (1959-02-01), Praturlon
patent: 3194047 (1965-07-01), Eggert, Jr. et al.
patent: 3545249 (1970-12-01), Brown
patent: 3707127 (1972-12-01), Palfy

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