Double shell closure with support ribs

摘要

A bottle closure having an outer shell with a frusto-conical configuration and a rib-supported threaded inner shell is described. The frusto-conical configuration of the outer shell allows the user to easily pickup the package and grip the closure and remove it from a bottle. The inner shell is threaded to allow the closure to engagingly mate with threads on a bottle or similar container. The inner shell is supported by ribs which face toward the outer shell. The ribs provide that the inner shell can be unscrewed from a threaded core of a manufacturing mold during production without causing noticeable distortion in the closure.