Abstract: Apparatus for forming a plastic pilfer-proof cap that comprises a ring, a plurality of inwardly directed hooks joined to one edge of the ring by hinge portions, and a weakened region is integrally molded with a main closure portion comprising a closed end and a skirt extending from the closed end and having an edge to which the pilfer-proof is attached during the molding. The hooks define sectors of a generally frusto-conical shell and extend inwardly and upwardly toward the closed end from the remote end of the ring. The hooks are released from the mold by rotating a mold portion that forms the respective hidden surfaces of the hooks and by pivoting the hooks radially outwardly toward the respective parts of the inner surface of the ring with respect to which the hidden surfaces are juxtaposed.

Abstract: A plastic pilfer-proof that comprises a ring, a plurality of inwardly directed hooks joined to one edge of the ring by hinge portions, and a weakened region is integrally molded with a main closure portion comprising a closed end and a skirt extending from the closed end and having an edge to which the pilfer-proof is attached during the molding. The hooks define sectors of a generally frusto-conical shell and extend inwardly and upwardly toward the closed end from the remote end of the ring. The hooks are released from the mold by rotating a mold portion that forms the respective hidden surfaces of the hooks and by pivoting the hooks radially outwardly toward the respective parts of the inner surface of the ring with respect to which the hidden surfaces are juxtaposed.