Polymer fiber tubular structure having kinking resistance
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United States of America Patent
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Oct 2, 2007
Grant Date -
May 20, 2004
app pub date -
Mar 19, 2002
filing date -
Dec 19, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for forming a tubular structure from a liquefied polymer, the apparatus comprising: (a) a dispenser for dispensing the liquefied polymer; (b) a precipitation electrode being at a first potential relative to the dispenser, the precipitation electrode being designed and constructed for generating a polymeric shell thereupon; and (c) a mechanism for increasing a local density of the polymeric shell in a plurality of predetermined sub-regions of the polymeric shell, thereby to provide a tubular structure having an alternating density in a longitudinal direction.
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