Convenience closure with safe edges

Abstract

A convenience closure having a removable central panel. A convenience closure is attached to a can end to seal the can. The closure includes a removable central panel; a panel fold with an endless severing line formed in its upper surface; a chuck wall fold which has a nose portion that extends radially inwardly farther than the severing line and overlies the severing line; and a pull tab, attached to the central panel, which has a nose portion that extends to the severing line. The panel fold includes a nose portion that extends to a position adjacent to and under the severing line. To remove the central panel, the pull tab nose is depressed to break the severing line. Then, the pull tab is moved upwardly to complete the breaking of the severing line and remove the central panel. Breaking the severing line forms two sharp raw edges; one lies under the nose of the chuck wall fold and is thus protected. The other raw edge is formed adjacent the nose of the panel wall fold. This edge is burnished and rolled into the panel wall fold nose by interference with the nose of the chuck wall fold during removal of the central panel.

Dependencies are inferred from the claim text.