Patent ID: 6413466
Filing Date: 2002-07-02
Classification: B65D,Y10S,Y10T

Abstract:
A method of forming a plastic container comprising:providing a preform having a finish with a support ring within a mold; expanding the preform into conformity with a cavity of the mold to form a container having a body portion with a shoulder and a sidewall; stretching material at an angle to form the shoulder, thereby substantially restricting a portion of that material defining a transition from unoriented to oriented material and inducing orientation into the shoulder adjacent to said finish and below the support ring, said orientation being induced in an amount sufficient to prevent opacifying of the material in the shoulder when the container is subjected to heat treating the container to induce in the body portion crystallinity of at least 30%; and heat treating the container to induce in the body portion crystallinity of at least 30%.