Abstract: A method is disclosed for forming an end shell to allow a reduction of the gauge of the end shell without loss of pressure 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 end 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 projecting 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 substantially concentrically of the end shell to within less than approximately 97.

Abstract: An improved sheet metal container and method of forming the same are provided in which the container comprises a body member and an end member wherein the body member is provided with a body flange extending generally radially outwardly at the end thereof, and the end member is provided with a wall which fits within the body member and an end flange extending generally radially outwardly at the end thereof rolled into a seam with the body flange. The body flange is curled at its terminal end against a coating provided on the metal surface of the body member and the end flange is curled at its terminal end against a coating provided on the metal surface of the end member to isolate the metals having different electrode potentials in order to resist galvanic corrosion.