Patent ID: 8899091
Filing Date: 2014-12-02
Classification: B21D,B65D

Abstract:
1. A method of manufacture for a twist metal closure having separate disc and circumferential ring, the method comprising the steps of: drawing a closure blank from a metal sheet into a cup, the cup having a top plate and a sidewall that is downwardly depending from the periphery of the top plate and has a free edge, cutting the cup adjacent to the top plate to produce the disc and the circumferential ring, each one of the disc and the ring having a cut edge; and assembling the disc and the ring together, the assembling step including curling the free edge and the cut edge of the ring into upper and lower curls and inserting the disc into the ring, such that the ring traps the disc between the upper and lower curls formed in the ring to thereby form the twist metal closure.