Method for making easy open container end with protective edges for its severed score

A method of making an easy opening container end and comprising steps of

• providing a piece of sheet material including an annular radial section joined by an annular first connecting section to an axially displaced center section, and a generally curved section joined to said annular radial section by a second annular connecting section;
• providing an annular inwardly opening locking bend in said second connecting section;
• providing an annular outwardly opening bead in said second connecting section spaced from said locking bend toward said center section;
• converting said first connecting section into a generally axial wall and an expansion rib which circumscribes said center section;
• forming a score line of weaknesses in said radial section to define a panel at least partially removable from the piece of sheet material;
• axially compressing said expansion rib to force the end of said axial wall adjacent said expansion rib radially outwardly to form a Z-bend;
• clamping said locking bend;
• axially compressing said bead to form an outer double-reverse fold having the compressed bead overlying said score line;
• clamping said center section;
• axially compressing said Z-bend to form an inner double-reverse fold having the compressed lower bend of said Z-bend underlying said score line.