Method and apparatus for producing finished foam containers

Details Method and apparatus for producing finished foam containers Method and apparatus for producing finished foam containers

1987-12-01

1990-06-19

Simmons, David

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With bending, folding, winding, or wrapping means

118254, 156 85, 156245, 156456, 156499, 493158, B29C 2728

Patent

active

049350919

ABSTRACT:
The present invention is directed to an improved apparatus and method for manufacturing completed foam plastic containers. An endless mandrel chain carries cup forming mandrels along a manufacturing path. After each mandrel is preheated, a bottom blank is placed on the mandrel bottom and held there by a vacuum. A cylindrical blank formed from longitudinally stretch-oriented foam sheet material is then placed onto the mandrel. This cylindrical blank is tightly tamped onto the mandrel and is clamped in place. Radiant heat is then used to shrink form a finished container. The bottom is then sealed to the cylindrical blank and the mandrel is transferred to a curling assembly where the top edge portion of each finished container is lubricated and then curled to form a finished rim. The apparatus of the present invention may form containers having a dual tapered configuration which allows the containers to be more tightly stacked.

REFERENCES:
patent: 3336847 (1967-08-01), Durat
patent: 3970492 (1976-07-01), Amberg et al.
patent: 4090905 (1978-05-01), Amberg et al.
patent: 4123215 (1978-10-01), Madenokoji
patent: 4262190 (1981-04-01), Hager
patent: 4268342 (1981-05-01), Young

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