Retortable container

Details Retortable container Retortable container

1988-10-13

1991-03-05

Seidleck, James

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

220453, 220461, 264241, 264320, 264322, 428 366, 428 367, 428518, 428 52D, B65D 2500, B29C 5100

Patent

active

049976915

ABSTRACT:
A retortable container has a wall of at least two co-formed laminas. This wall is highly impermeable to fluids selected from the group consisting of oxygen and aromatic vapors. The wall includes a first load-carrying lamina of a first plastic material. This load-carrying lamina has been formed without mechanical hysteresis in the melt phase by a thermal pressure forming apparatus to cause strengthening with orientation of the load-carrying lamina in at least one axis but without memory of its pre-melt phase shape. The wall also includes a second sealing lamina of a second plastic material. This second sealing lamina is coextensive with the first load-carrying lamina. Consequently, the container formed by the apparatus is retortable, i.e. it can withstand temperatures and pressures of a retort chamber without undergoing significant and permanent distortion.

REFERENCES:
patent: 3606958 (1971-09-01), Coffman
patent: 3684258 (1972-08-01), Coffman et al.
patent: 4562325 (1987-03-01), Benge et al.
patent: 4647509 (1987-03-01), Wallace
patent: 4681797 (1987-07-01), Van Iseghem

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