Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Serially arranged with preform reshaping means
Patent
1981-11-30
1983-06-21
Derrington, James H.
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Serially arranged with preform reshaping means
4253241, 425343, 425384, B29C 714
Patent
active
043891799
ABSTRACT:
This invention relates to a machine for and a method of making building products from a coiled sheet of thermoplastic polymer such as polyvinyl chloride. In the practice of this invention, portions of the polymeric sheet are selectively and sequentially heated and progressively bent to the desired shape by passing the sheet through a series of heating, forming and cooling stations.
The simplified design of the machine enables the user to custom fabricate building products at a construction site with a resulting savings in cost. Typical products adapted to be made in accordance with the invention are exterior building siding, siding accessories and other building products.
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Delamater John R.
Westcott Robert F.
American Hoechst Corporation
Crall Hugh C.
Derrington James H.
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