Aluminum Company of America

George L Smith, Jr

Hans H Diekhoff

Andrew B Trageser

James M Story

Milton L Stineman

A method of forming a drawn metal cup for a container body which includes drawing a cup having a circular boss in its base wall, redrawing the cup and forming a pressure resistant profile in its base wall.

Method of forming a metal container body

A blankholder having a central opening for applying pressure against the flange of a blank being drawn through a die in a draw press. The blankholder is divided into individual segments defined by its inner and outer peripheries, at least one continuous divisional line intermediate the inner and outer peripheries, and radii extending outwardly from the central axis. Each individual segment is provided with a different power source so that each segment can provide a force to the blank flange independent of the force being applied by any other segment.

Blankholder for a draw press

An improved method of forming and construction for a tabless, digitally openable sheet metal container component including at least two inwardly displaceable, adjacently disposed opening panels. The opening panels are substantially rigid and are located within an integral deflectable portion projecting outwardly from the general plane of the surface wall of the container component and having a common deflectable surface between the opening panels in the form of a raised bridge of metal therebetween designed to respond to digitally applied pressure creating stress sufficient to initiate substantially simultaneous fracture of frangible webs which define the loci of separation of the opening panels. The container component is formed by opposed die sets which, in a single operation, extrude metal from between opposing die surfaces to produce a thin residual of metal in the frangible web around each opening panel and form the deflectable portions around the opening panels.

Growing community of inventors

New Kensington, PA, United States of America

George L Smith, Jr