Patent ID: 7387217
Filing Date: 2008-06-17
Classification: B29C,B29D,B29L,B65B,B65D

Abstract:
1. A method of molding a plastic part onto a top of a container, the container formed from a flexible web material with crease lines into a tube shape, filled with contents, transverse-sealed and cuffed to form a primary shape container and formed into a final shape container by multi-folding of folded flaps onto the container top, the method comprising: forming a cavity between an inner wall of a mold of an injection molding apparatus having a nozzle and the top of the container by applying the mold of the injection molding apparatus to the container top; injecting fusion thermoplastic material into the cavity, against the inner wall of the mold and into gaps between the folded flaps and the container top by injection of the fusion thermoplastic material from the nozzle into the cavity; cooling the injected thermoplastic material; detaching the mold of the injection molding apparatus from the container top to leave the molded plastic part joined to the container top; and wherein a support member is temporarily arranged in the mold of the injection molding apparatus to hold the flaps.