Patent ID: 6126886
Filing Date: 2000-10-03
Classification: B29C,B29K,B29L,B65D,Y10S

Abstract:
A method of forming a wide mouth blow molded biaxially oriented thermoplastic container comprising the steps of i) stretch blow molding from a preform, an intermediate article comprising the container with the mouth of the container terminating in an accommodation element having a neck that supports the preform in a mold; ii) removing the intermediate article from the mold and severing the accommodation element to produce the biaxially oriented container, and iii) subsequently heating the material of the container adjacent the open mouth until workable and then post forming by rolling the material adjacent the open mouth to form a curled perimeter defining the open mouth; whereinthe open mouth is restrained from undesired hoop dimensional changes by a mandrel, located in the open mouth, during the heating and post forming,the mandrel defines shade features permitting shape memory of the material heated in preparation for post forming to change shape to at least in part form the shape features, anda mating die having die features in conformance with the shape features is provided to supplement the shape memory's action to conform the material to the shape features.