초록 ▼

A plastic closure includes a base molded as one piece with a lid and integrally connected to the lid by a hinge. The lid is radially inwardly displaced from an outer periphery of the base. The hinge has a central portion with a convex outer surface, with the lid closed and as viewed in side elevatio

A plastic closure includes a base molded as one piece with a lid and integrally connected to the lid by a hinge. The lid is radially inwardly displaced from an outer periphery of the base. The hinge has a central portion with a convex outer surface, with the lid closed and as viewed in side elevation, that blends with a smooth curvature into outer surfaces of the lid and the base. The hinge has laterally spaced end portions on opposite sides of the central portion and having concave outer surfaces when the lid is closed. The base preferably has a circular periphery and the end portions of the hinge are angularly spaced from each other. The outer surface of the lid preferably is flat, and the lid preferably is integrally connected to the base as molded by at least one frangible bridge spaced from the hinge.

대표청구항 ▼

The invention claimed is: 1. 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 sa

The invention claimed is: 1. 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.