Container closure with a plastic liner having projections extending into depressions in the plastic shell

摘要

A container closure includes a plastic shell, and a liner molded by fluidizing a plastic material within the shell. Depressions are formed at circumferentially spaced positions at an upper end portion of the inner peripheral surface of the skirt wall. The depressions each have a circumferential length increased radially outwardly at least in part thereof. A plurality of projections are formed on the outer peripheral surface of the liner in correspondence with the depressions.