Patent ID: 8109405

Claim:
A can end structured to be affixed to a can body, the can end comprising: a severable panel having a periphery, an interior, a product side structured to face toward the can body when the can end is affixed to the can body, and a public side structured to face away from the can body when the can end is affixed to the can body; a peripheral scoreline defining the periphery of the severable panel; an opening mechanism coupled to the severable panel, the opening mechanism being actuatable to sever the peripheral scoreline; a rivet coupling the opening mechanism to the severable panel, the rivet having a base disposed at the severable panel, a stem extending outwardly from the severable panel, an inboard side facing the interior of the severable panel, and an outboard side facing the periphery of the severable panel; and a rivet base scoreline in the public side of the severable panel, the rivet base scoreline being disposed about 0.025 inch or less from the stem of the rivet, wherein said rivet base scoreline includes an arcuate head portion substantially disposed on the inboard side of the rivet, the arcuate head portion having a first radius of curvature, wherein the rivet base scoreline further includes first and second arcuate arm portions having a second radius of curvature and first and second ends, the radius of curvature of each of the arcuate arm portions extending from the arcuate head portion to the corresponding one of the first and second ends, the first radius of curvature of the arcuate head portion is the same as the second radius of curvature of the first and second arm portions, and wherein the first and second ends of the first and second arcuate arm portions of the rivet base scoreline generally extend toward the outboard side of the rivet.