Plastic containers for storage of goods under pressure

Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source

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215 16, B65D 2300

Patent

active

044851340

ABSTRACT:
A form-retaining container made of synthetic plastic material and apparatus for its manufacture in which a plastic material is fed in liquid state onto a male member to provide a layer on the male member constituting a blank for the container. The layer is cooled to prevent crystallization of the material. The thus cooled blank is placed into a mold cavity having an interior configuration corresponding to the desired outer shape of the container to be produced. The layer is inflated into conformity with the mold cavity. The configuration of the mold cavity is such that the blank undergoes biaxial stretching in a middle region of the container by at least 1.5 times while the mouth and part of the bottom of the container will be formed by biaxially stretching the blank less than 1.5 times. The inflated blank is then heated until curing is completed and then the blank is removed from the mold.

REFERENCES:
patent: 3733309 (1973-05-01), Wyeth et al.
patent: 3934743 (1976-01-01), McChesney et al.
patent: 4164298 (1979-08-01), Mishikawa et al.
patent: 4233022 (1980-11-01), Brady et al.
patent: 4260567 (1981-04-01), Poppe et al.
patent: 4264558 (1981-04-01), Jacobsen
patent: 4387815 (1983-06-01), Jacobsen
Verpackung-Rundschay, May 1970, p. 718.

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