Method of making expandable and collapsible mandrel
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United States of America Patent
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Jul 5, 1988
Issued Date -
N/A
app pub date -
Sep 10, 1987
filing date -
Jun 30, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An expandible and collapsible mandrel and method of making same are provided wherein such mandrel has a central support and a plurality of longitudinal segments supported for pivoting movements toward and away from the support and the longitudinal segments have circumferentially disposed intermeshing fingers which cooperate to provide a substantially cylindrical supporting outside surface at each of an infinite number of effective diameters and with the supporting surface at each effective diameter being free of longitudinal gaps which extend the full length of the longitudinal segments.
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