Patent ID: 7673490

Claim:
A method of making a convenience closure, comprising: providing an end panel; forming a mustache score in said end panel; and forming a flex line score in said end panel adjacent to said mustache score; further comprising forming a rivet formation in said end panel, and wherein said flex line score is adjacent to said rivet formation; wherein said mustache score includes a central portion that is positioned radially inwardly on said end panel relative to said rivet formation and is curved about said rivet formation and further has first and second end portions that are curved away from said rivet formation, wherein said end panel has an diametric axis of symmetry that intersects a center point of said central portion of said mustache score and said rivet formation has a center point, and wherein a transition between said central portion and said first end portion is located at a transitional angle from said diametric axis of symmetry as measured from said center point, and wherein said transitional angle is substantially within a range of about 45° to about 60°.