B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/14.1
B01D 63/02 (2006.01) D01D 5/24 (2006.01) D01F 2/04 (2006.01)
Patent
CA 1109000
ABSTRACT OF THE DISCLOSURE This application discloses an apparatus and method for preparing an elongated, coreless bundle of homogeneously distributed hollow, generally longitudinally-directed, semi- permeable filaments, free of direct mechanical attachment to each other, for use as a fluid separation element in a dif- fusion device such as a dialyzer. The filaments are positioned in the bundle whereby the majority of the lengths thereof, and the overall directions thereof, define an angle to the longitudinal axes of the said filament bundle. The filaments are positioned in crossing, overlying relation with adjoining filaments, said filaments essentially occupying individual, parallel, flat planes. The filaments define first sets of generally parallel strands defining a first angular relation to said longitudinal axis and second sets of generally parallel strands defining an opposite angular relation to said longitudinal axis, a first filament of a first set being overlaid by a first filament of a second set, which first filament of said second set is, in turn, overlaid by a second filament of said first set, which second filament of said first set is, in turn, overlaid by a second filament of said second set. The said relationship continues throughout the majority of the filaments of the first and second sets to define interleaving releationships, in which the filaments of each set overly the immediately- preceding filaments of the other associated set, and are overlaid by the immediately-following filaments of said other set, the majority of individual filaments thereof extending across 15 to 50 percent of the width of said filament bundle.
291548
Fitzgerald James A.
Kopp Clinton V.
Washington Freddie L.
Baxter Travenol Laboratories Inc.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
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