Akzo N.v.

Akzo Nobel N.v.

Manfred Martin

Lothar Low

Rudolf Baumgart

Gunter Scheven

Renato Pasquali

Hans-Gunther Breidohr

Peter Riesop

Bernhard Krautwurst

Hans-Gunter Breidohr

Heinz Stemig

August Stoldt

Process for removal of lumen fillers and other soluble residues from

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.

Hollow fibers

Hollow fiber bundle and a method and device for its manufacture

Disclosed is a method of and a device for producing bundles of hollow fibers such as used for dialysis. The device includes a guiding device for a continuous fiber which rotates in a plane. At least two groups of take-up elements are mounted on a conveyor. The conveyor is intermittently activated so that a group of take-up elements is placed in a working position in the range of movement of the guiding device, and a strand of a desired thickness is wound around the take-up elements. Thereafter, the conveyor is activated to discharge the first group together with the completed strand from the working position and place the subsequent empty group of take-up elements in the working position, without interruption of movement of the guiding device. During the winding-up of the subsequent strand, the completed strand is cut and wrapped into bundles.

Method of and device for producing bundles of hollow fibers

A hollow thread bundle for material and/or heat exchange has a plurality of substantially parallel hollow threads of substantially equal length, and a sewing seam wrapping around the plurality of hollow threads and including at least one sewing thread. The hollow thread bundle can be produced by wrapping the plurality of hollow threads by a sewing seam including at least one sewing thread.

Hollow thread bundle and method of its manufacture

Growing community of inventors

Wuppertal, Germany

Manfred Martin