Method for shaping closed bottom of tubular container

Details Method for shaping closed bottom of tubular container Method for shaping closed bottom of tubular container

1988-07-21

1990-02-06

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264514, 264526, 264540, 264573, 264DIG78, 425388, B29C 4922, B29C 4904

Patent

active

048987085

ABSTRACT:
A method for producing thermoplastic tubular containers having a tubular wall section, open neck, and integral sealed bottom where a thermoplastic disc, is sealed to the inner wall of the tubular wall section, and the disc, while in a moldable state, is formed into a bottom wall by application of either a vacuum to the exterior surface of the disc or a fluid pressure to the interior of the tubular wall section, or both, to mold the disc in a mold cavity to a desired shape. A supporting sleeve surrounds the tubular wall section during application of the fluid pressure. Thermoplastic containers can be formed from a single thermoplastic material or from laminates, such as a laminate material containing an oxygen impermeable layer.

REFERENCES:
patent: 3047910 (1962-08-01), Downs
patent: 3329996 (1967-07-01), Marcus
patent: 3338997 (1967-08-01), Tigner
patent: 3661489 (1972-05-01), Moore
patent: 4035463 (1977-07-01), Rosenkrant et al.

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