B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/69
B21D 22/20 (2006.01) B21D 24/00 (2006.01) B21D 51/44 (2006.01)
Patent
CA 1081548
Abstract of the Disclosure A method is disclosed for forming an end shell to allow a reduction of the gauge of the end shell without loss of pres- sure holding capabilities or, alternatively, to increase the pressure resistance of the container to which the end shell is secured. This method comprises the steps of providing a sheet metal and shell having a substantially planar central wall portion, a first curved portion around the periphery of the central wall portion connecting the central wall portion with an integral frustoconical wall portion, a peripheral flange project- ing radially outwardly from and integral with the frustoconical wall portion, and exterior and interior surfaces respecting its intended use on a container, supporting the central wall portion with a first supporting means disposed against the interior surface thereof opposite said frustoconical wall portion susbstan- tially concentrically of the end shell to within less than approximately 97.5% of the diameter of the central wall portion; supporting the peripheral flange with a second supporting means disposed against at least a portion of the exterior surface thereof; and reducing the distance between the peripheral flange and the central wall portion by moving at least one of the supporting means toward the other to form the outer peripheral portion of the central wall portion downwardly and inwardly toward the first supporting means into the shape of a reinforcing channel around the central wall portion.
311021
Aluminum Company Of America
Smart & Biggar
LandOfFree
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