Patent · US Expired

Hollow fibers

US5470659A · kind A · utility

28Cited by

8References

4Claims

0Family size

Assignee

Akzo N.V. · NL

Inventors

Rudolf Baumgart · Wuppertal, DE
Manfred Martin
Lothar Low · Elsenfeld, DE
Gunter Scheven · Zell am Harmersbach, DE

Key dates

Filing date	Feb 12, 1993
Grant date	Nov 28, 1995
Priority date	—
Expiry date	Feb 12, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/298
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.