Patent ID: 7980413

Claim:
A metallic can, comprising: a vertically oriented cylindrical sidewall; an end wall that is unitary with said cylindrical sidewall, said end wall comprising a recessed central portion and a downwardly flanged rim portion that defines a substantially circular standing ring, and where said downwardly flanged rim portion comprises; a first outer convexly curved annular surface that when viewed in vertical cross-section has a first radius of curvature R 1 ; a second, lower convexly curved annular surface that when viewed in vertical cross-section has a second radius of curvature R 2 ; a third, inner convexly curved annular surface that when viewed in vertical cross-section has a third radius of curvature R 3 ; and wherein said first, second and third radii of curvature R 1 , R 2 and R 3 are each different from each other; wherein said third radius of curvature R 3 is greater than said second radius of curvature R 2 , wherein said second radius of curvature R 2 is greater than said first radius of curvature R 1 .