Method for winding the fibres of exchange devices, such as blood oxygenators and the like, and an exchange device produced by this method
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United States of America Patent
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Aug 28, 1990
Grant Date -
N/A
app pub date -
Nov 23, 1988
filing date -
Nov 24, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The fibre (3) is wound in several layers at a variable winding pitch so that the angle winding (.alpha.) is kept substantially constant. The length wound in each layer and the angle at which the various layers cross each other thus remain substantially constant. The winding pitch (p) is variable according to the equation: P=P.sub.1 +2.pi...DELTA.r tan .alpha. where: P.sub.1 is the pitch at which the innermost layer is wound, .alpha. is the substantially constant winding angle, and .DELTA.r is the increase in the winding radius corresponding to the layer which is being wound.
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