Method and apparatus for producing finished foam plastic...

Details Method and apparatus for producing finished foam plastic... Method and apparatus for producing finished foam plastic...

B - Operations, Transporting

29

C

18/650

B29C 67/20 (2006.01) B29C 33/58 (2006.01) B29C 57/12 (2006.01) B29C 61/02 (2006.01) B29C 65/78 (2006.01) B29C 69/00 (2006.01)

Patent

CA 1200663

ABSTRACT OF THE DISCLOSURE An improved apparatus and method for manufacturing completed foam plastic containers are provided herein. 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. Such apparatus may form containers having a dual tapered configuration which allows the containers to be more tightly stacked.

392924

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