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US 4,948,444 AGranted
Process for production of a bundle of hollow semi-permeable fibers
AssigneeSociete Lyonnaise des Eaux, S.A.
InventorsRichard A. Schutz, Patrick Paris
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AssigneeSociete Lyonnaise des Eaux, S.A.
InventorsRichard A. Schutz, Patrick Paris
Estimating the term…
The invention relates to a process and an apparatus for the production of a bundle of filaments from at least one filament, and its application especially to the production of a bundle of hollow semi-permeable fibers used for producing a filtration module. According to this invention, the filaments (1) is wound in a first step, in several superposed layers around a support plate (10) having two take-up edges (17) perpendicular to the direction of winding of the filament, and conferring on this filament an alternating transverse movement of decreasing amplitude in such a manner as to achieve a winding having a predetermined profile. The support plate (10) is then removed by retracting the take-up edges (17) toward each other so as to obtain a bundle having a transverse section which is a function of the profile of the winding and curved ends.
A process for producing a bundle of hollow, semi-permeable fibers from at least one filament (1) comprising winding said filament around a support member having two take-up edges spaced from and parallel to a winding axis so as to form a plurality of superposed layers thereon, conferring upon said filament during winding an alternating transverse movement of an amplitude decreasing in successive layers so as to produce a winding on said support member of a predetermined profile corresponding to said support member, retracting the edges of said support member and removing said wound filament from said support member to form a bundle having a profile corresponding to said support member and curved ends.
Dependencies are inferred from the claim text.