Method for manufacturing a plastic part having a shape memory
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United States of America Patent
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Apr 16, 1991
Issued Date -
N/A
app pub date -
Oct 23, 1989
filing date -
Apr 14, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus forms a plastic part having a shape memory which has been formed to a second shape from an initial shape by the application of pressure to cause molecular orientations which are subsequently fixed by being cooled to a desired temperature and, when subjected to subsequent energy such as heating, will eliminate the molecular orientation and create a restoring force to return the part to the initial shape.
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