This invention relates to apparatus adaptable for use on a double acting press for producing high reduction metallic cups of high quality. The double acting press is provided with a crankshaft having a pair of offset cranks for attachment to the outer punch holder and the redraw horn assembly to produce a time lag between the operation of the outer punch holder and the redraw horn assembly. The high reduction cupping apparatus comprises a housing having an opening extending vertically therethrough, a redraw horn assembly centrally mounted in the housing for reciprocation therein, a pair of vertically disposed redraw cushion cylinders positioned within and in the upper portion of the housing, said redraw cushion cylinder surrounding the upper portion of the redraw horn assembly, a cushion piston movably carried in each cushion cylinder, said redraw cushion pistons being in engagement with each other for cumulative pressure effects, a cylindrical drawn horn and pressure sleeve fitting around the redraw horn assembly and having its upper portion engageable by the lower redraw cushion piston, a pair of vertically displaced pressure ring cylinders positioned within the housing and around the redraw horn assembly immediately below the redraw cushion cylinder pair, each pressure ring cylinder carrying a pressure ring piston fitting around the draw horn, said pressure ring pistons being in engagement with each other for cumulative pressure effects, a pressure ring reciprocably carried in the lower end of the housing and fitting around the lower end of the draw horn, the lower pressure ring piston engaging and applying cumulative pressure to the pressure ring, an annular cutter fixedly mounted on the lower end of the housing and surrounding the lower end of the pressure ring, a stationary die holder positioned beneath the lower end of the housing, said die holder having a central vertically extending hole therethrough, concentrically located with the above parts, a blank and draw die mounted in the upper portion of the die holder concentrically with this aforementioned hole, said blank and draw die having an external diameter slightly less than that of the annular cutter so that a shearing action may take place therebetween, the inner diameter of the blank draw die being sized to receive the draw horn in the drawing operation, a redraw die mounted in the die holder concentrically with the hole in the die holder, said redraw die being sized to receive the redraw horn assembly in the redrawing operation.

A method of manufacturing a high pressure gas cylinder by deep drawing and ironing a blank of high strength steel, the periphery of the blank being ground prior to cupping.

A blanking and forming press for sheet metal caps having a fixed cross member, a sleeve constituting the blanking knife housed in the fixed cross member, first and second cross members supported mobile relative to the fixed cross member on its opposed sides, a rod connected at its one end to the first cross member and at its other end to a forming and blanking punch, a cylindrical die supported by the second cross member mobile coaxially to the rod and defining a blanking knife cooperating with the knife defined by the sleeve to form, as the mobile cross members approach each other, a cap member by permanent deformation of a discoidal element cut by the sleeve penetrating into the die.

A tooling for stretching and doming the end panel of an easy opening end unit wherein the end panel is axially displaced at the center thereof so as to stretch the metal of the end panel and the end panel is bent around a small radius annular corner of a support to effect a rigid and permanent displacement of the end panel in the form of a dome.

A cup-shaped receptacle closure is formed from a blank of sheet material by placing the blank between relatively movable punch and die members, with the periphery of the blank gripped between the punch member and an annular draw ring carried by the die member. The closure is formed over a forming post assembly carried by the die member, and as formed has an annular wastage ring thereon in the gripped region of the blank. The forming post assembly is circumferentially spaced from the annular draw ring, and has cutter means thereon for subsequently cutting the annular wastage ring into pieces, which pieces are then removed through the annular space between the assembly and the draw ring.