Patent ID: 9566634
Date: 2017-02-14
CPC Classifications: B21D,B65D

Claim:
1. A method of forming a can end for a two-piece beverage container, the can end having a central panel wall with a product side and a public side, the public side having a means for opening a frangible panel segment, the method comprising the steps of: forming in a shell press an end member shell comprising a central panel centered about and extending radially outwardly from a longitudinal axis, a panel radius along a peripheral edge of the central panel, a strengthening member integral with the panel radius wherein the strengthening member is a generally U-shaped countersink having an inner wall joined to an outer wall by an annular curved portion, a circumferential wall extending upwardly from the strengthening member, a bend joining the circumferential wall with the outer wall of the strengthening member, and a curl defining an outer perimeter of the end member shell and integral with the circumferential wall; reforming the end member shell in a conversion process to increase a diameter of the central panel, to form a frangible score in the central panel, and to stake a tab to the central panel; and reforming the end member shell to increase a height of the bend above a lowermost portion of the strengthening member.