The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 1995
Filed:
Feb. 12, 1993
Applicant:
Inventors:
Rudolf Baumgart, Wuppertal, DE;
Manfred Martin, Wuppertal, DE;
Lothar Low, Elsenfeld, DE;
Gunter Scheven, Erlenbach, DE;
Assignee:
Akzo NV, Arnheim, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D02G / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
428398 ; 428376 ; 428399 ; 428401 ; 21050023 ; 21050029 ; 55527 ; 55528 ;
Abstract
A bundle of hollow fibers of uniform diameter, particularly for use in dialysis is formed of a plurality of parallel hollow fibres at least a part of which, prior to the formation of the bundle, is permanently undulated by means of interleaved undulating elements moving opposite the feeding direction of freshly extruded fibres. The undulating elements are in the form of cylindrical rods having a substantially larger diameter than the outer diameter of the fibres so that the wavelength and amplitude of the resulting undulations are substantially larger than the outer diameter of the fibres.