Capillary fiber bundles
AssigneeBaxter Travenol Laboratories, Inc.
InventorWilliam J. Schnell
Life of this patent
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Abstract
Capillary fiber bundles of semipermeable membrane material may be used by winding the fibers onto a reel member to form an annular assembly of the fibers, and thereafter cutting the annular assembly into separate bundles. In accordance with this invention, the capillary tubing is fed to the reel through guide slot means elongated in a direction generally parallel to the axis of rotation of the reel. The tension on the capillary tubing is sufficiently low to allow the capillary tubing to move about while winding in the guide slot means in generally random manner. Accordingly, the bundles comprise strands in generally non-parallel crossing arrangement with adjacent strands. Individual bundles may be wrapped in a special flexible sheet, and cut at their ends for improved quality.
Claims3
A bundle of tubular capillary fibers of semipermeable membrane material, said bundle being wrapped in a coil of flexible sheet, said sheet defining an inner coiled end portion positioned adjacent said bundle, said inner coiled end portion being of substantially rectangular shape, an outer end portion, opposed to said inner end portion, defining an outer end and sides which taper transversely inwardly toward the outer end, and marker means on said paper sheet spaced from the middle of said sheet toward said outer end, the outer end of said wrapped sheet overlying said marker means, said bundle being of a predetermined compression by said coil of sheet, governed by the positioning of said marker means.
Dependencies are inferred from the claim text.