Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1974-12-16
1977-08-16
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 466, 264 467, 264 469, 264255, 264267, 264310, 264DIG60, 297452, 297DIG1, B29C 507, B29D 2704
Patent
active
040426637
ABSTRACT:
A metal seat pan is placed inside a rotational casting mold to define part of a rotational casting cavity into which is introduced rotationally castable material for forming a flexible plastic seat cover. A rotational casting operation produces a closed, hollow seat cushion shell defined by the seat pan and the flexible plastic cover. Foaming ingredients are introduced into the hollow shell to form a resilient foamed plastic interior. The resulting seat cushion is monolithic, without seams or joints and has no removable parts or mechanically joined components which will come apart from each other.
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Whittington, Lloyd R. "Whittington's Dictionary of Plastics," Stamford, Conn., Technomic, c. 1968, pp. 59-60 (Sponsored by Society of Plastic Engineers).
Anderson Philip
Coach and Car Equipment Corporation
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