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A substantially full opening steel can end for food product cans easily opened by an aluminum pull tab riveted to a removable panel portion defined by a score line in a recessed end wall of the can end located close to a seam between the can end and can body. The panel portion has a protective tripl

A substantially full opening steel can end for food product cans easily opened by an aluminum pull tab riveted to a removable panel portion defined by a score line in a recessed end wall of the can end located close to a seam between the can end and can body. The panel portion has a protective triple fold formation along its peripheral edge when removed, and the score line is located in the top layer of the triple fold formation beneath an overlying stepped tip of the pull tab which ruptures the score line during opening of the can. The score line preferably extends 300°, 150°in each direction from the stepped pull tab tip, around the can end to retain the opened panel portion and pull tab on the can when opened.

대표청구항 ▼

In a metal can end of a type having a seam flange adapted to be connected by seam means to a food products can body and having a recessed corner located below the seam flange with an end wall extending inward from the recessed corner, and having a triple fold formation extending entirely around the

In a metal can end of a type having a seam flange adapted to be connected by seam means to a food products can body and having a recessed corner located below the seam flange with an end wall extending inward from the recessed corner, and having a triple fold formation extending entirely around the end wall, with a score line located close to said recessed corner and extending around the end wall in the top layer of the triple fold defining a removable panel portion in the end wall, with the triple fold forming a protective peripheral edge on the panel portion when torn along the score line by an aluminum pull tab connected by a rivet formed integrally in the panel portion and located close to the score line, and with the removable panel portion of the end wall extending flatwise inward in the plane of the bottom layer of the panel portion protective peripheral triple fold formation, the pull tab having a flat nose bottom wall with an opening formed in its rear portion through which the rivet extends when the pull tab is staked to the removable panel portion and with a stepped tip formed at its front terminal portion and with its flat bottom wall held flatwise around the rivet by the rivet in contact with the flatwise extending panel portion when staked by the rivet to the panel portion; wherein the improvement comprises an annealed, tempered, tin-free steel can end; the pull tab stepped tip engaging the triple fold formation at an inner portion of the top layer of the triple fold where it curves downwardly to join the middle triple fold layer; the outer end of the stepped tip overlying the score line; and a moustache cut formed in the upper surface of the flatwise extending panel portion close to the rivet and encompassing the rear and sides of the rivet and terminating in wings lying laterally in front of the front portion of the rivet.