Patent ID: 8056749

Claim:
A plastic closure that includes a base molded as one piece with a lid and integrally connected to said lid by a hinge, said hinge being radially inwardly displaced from an outer periphery of said base, said hinge having a central portion with a convex outer surface with said lid closed and as viewed in side elevation, said convex outer surface blending with a smooth curvature into outer surfaces of said lid and said base, said hinge having laterally spaced end portions on opposite sides of said central portion, said end portions having concave outer surfaces with said lid closed, said lid being integrally connected to said base as molded by at least one frangible bridge spaced from said hinge, wherein said hinge is unitary and angularly extends from a center of said hinge to ends of said end portions of said hinge, and said hinge becomes concave at an angle from said center of said hinge, wherein a depth of the concavity progressively increases toward said ends of said end portions.