Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Coacting shaping surfaces
Patent
1975-01-13
1976-12-28
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Coacting shaping surfaces
264257, 264320, 264325, B29C 100
Patent
active
039999300
ABSTRACT:
A mold assembly, as much as 12 feet long, consists of a strip of material having a cavity extending from end to end, the cavity being smooth walled about its periphery and open at ends and on one side. Curable sheet composite elastomer material faced with a reinforcing sheet is folded around a mandrel leaving free flaps and slid endwise into the cavity. The flaps are then folded on each other over a filler and a cover strip forming a part of the mold is laid over them. This assembly is then loaded endwise into a container of similar length in which is an inflatable bag, the container being located in an oven. The bag is first inflated to press the cover strip against the exterior of the mold assembly and heat is applied to cure the elastomer material. Thereafter the bag is deflated, the mold assembly removed from the container, the elastomer material and mandrel removed endwise from the mold cavity and the mandrel removed from the cured elastomer material to free the cured finished product.
REFERENCES:
patent: 1773138 (1930-08-01), Gammeter
patent: 2361735 (1944-10-01), Beckwith et al.
patent: 2723426 (1955-11-01), Pelly
patent: 2838796 (1958-06-01), Reed
patent: 3041660 (1962-07-01), Fink
Charvat R. J.
Husar Francis S.
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