Patent ID: 7926675

Claim:
A non-detachable metallic end closure with a permanently attached pull tab, comprising: a center panel; a seaming panel positioned on a peripheral edge of said center panel which is adapted for interconnection to a neck of a container; a pull tab having a grip portion on one end and a nose portion on an opposite end and an attaching portion positioned therebetween; a rivet operably interconnecting said attaching portion of said pull tab to said center panel, wherein said pull tab has a first position prior to opening which is substantially parallel to a horizontal plane of said center panel, and a second position of opening wherein said pull tab is aligned substantially perpendicular to said horizontal plane of said central panel after fully opening a tear panel provided on said center panel; at least one projection integrally formed in said center panel and extending upwardly therefrom, said at least one projection positioned substantially adjacent to an edge of said attaching portion to prevent rotation of said pull tab and said attachment portion when the pull tab is in both the first position and said second position; and wherein the at least one projection has an asymmetrical shape with variable steep flanks that are non parallel to each other.