Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1985-03-19
1987-01-20
Kittle, John E.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
428131, 428913, 264230, 264342R, 264345, B29C 6100
Patent
active
046379444
ABSTRACT:
A process and device utilizing the memory characteristics of cross-linked polymers for temporarily holding and releasing parts or components is presented. In a first step, a polymeric material or part capable of being cross-linked is formed into a first "memory" shape. Thereafter, in a next step, the polymer is cross-linked via irradiation or any other suitable technique to fix or lock the polymer into the first memory shape. Next, the polymer is heated and deformed to a second shape and thereafter cooled to lock in that second shape. During the deformation process, the cross-linked polymer will preferably be deformed about a second component or part so that upon cooling, the second part will be tightly held by the deformed polymer. Thus, the second part or component will be temporarily held for any desired length of time. When it is desired to release the second part, the deformed cross-linked polymer part is subjected to a second heating (above its transition temperature) whereupon the polymer will revert back to its first memory shape and thereby release the second part or component held therein. In an alternative embodiment of the present invention, the cross-linked deformed polymeric material may be itself held; the deformed cross-linked material releasing itself from the holder upon reheating (above its transition temperature).
REFERENCES:
patent: 4035534 (1977-07-01), Nyberg
patent: 4087849 (1978-05-01), Colville et al.
patent: 4442153 (1984-04-01), Meltsch
Kittle John E.
Monsanto Company
Seidleck James J.
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