Patents by Inventor Herbert Wellenhofer

Herbert Wellenhofer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5670278
    Abstract: Described is a support for electrodes of primary or secondary electric cells, said support comprising an open-mesh, three-dimensional network structure composed of plastics threads coated unbrokenly with one or more efficiently conducting, thin metal coats and, to form the three-dimensional structure, being provided with humplike depressions and/or elevations which are distributed over its surface and in whose region the distance between the plastics threads is increased, wherein at least the outer metal coat of the plastics threads consists of a valve metal. Also described are electrodes comprising such a support and a process for producing the articles mentioned.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: September 23, 1997
    Assignee: Hoechst Trevira GmbH & Co KG
    Inventors: Dieter Disselbeck, Herbert Wellenhofer
  • Patent number: 5372760
    Abstract: A process for producing fiber from polyarylene sulfide, by melt spinning a polyarylene sulfide into a gas, cooling the spun filaments with a blown gas, taking the filaments off at a high speed, storing the spun filaments, drawing the spun filaments in two stages and after treatment stage, and immediately thereafter heat setting the drawn filaments. Fibers produced by the invention have excellent mechanical properties including tensile strength and transverse strength, and the process is very efficient.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: December 13, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Wellenhofer, Werner Bruckner, Andreas Fischer, Gerhard Leumer
  • Patent number: 5370833
    Abstract: A process produces fibers from polymers which give off troublesome gases and/or vapors during spinning, comprising the steps of:a) extruding the molten polymer through a spinneret into a closed spinning shaft,b) quenching the resulting filaments in the spinning shaft with a gas,c) taking off the resulting filaments from the spinning shaft,d) conducting the quench gas away from the spinning shaft and introducing it into a gas purification system ande) purifying the used quench gas by contact with an adsorbent for said troublesome gases and/or vapors.It is possible by the present invention to keep hazardous gases occurring during the spinning of polymers away from the surroundings and to dispose of them. Suitable polymers are in particular polyphenylene sulfides.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: December 6, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Wellenhofer, Gerhard Leumer, Andreas Fischer, Diethelm Rabe, Hans-Jurgen Profe
  • Patent number: 4953271
    Abstract: An intermingling nozzle for filaments and yarns is described. The intermingling nozzle comprises a reedlike side by side arrangement of alternate yarn channel and closing plates. In the yarn channel plate sides adjoining the closing plates, grooves are formed as yarn channels and perpendicularly thereto as blowing channels. The closing plates are rotatable with respect to the yarn channel plates, specifically between an open position, in which they give access to the yarn channels to allow yarns to be inserted, and a closed position, in which they cover up the yarn channels. The intermingling nozzle is suitable in particular for intermingling high-count yarns, for example for reinforcing fabrics and tire cords.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: September 4, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Wellenhofer, Ingolf Jacob, Josef Geirhos
  • Patent number: 4221755
    Abstract: Synthetic filaments having a circular cross-section are manufactured by melt-spinning from spinneret openings having likewise a circular cross-section which are provided with lateral arms distributed over their circumference and ending in the circular cross-section area at an about right angle. The lateral arms need not cover the complete length of the spinneret holes, but only the outlet opening of the spinneret holes.
    Type: Grant
    Filed: July 11, 1978
    Date of Patent: September 9, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Wellenhofer, Hans-Otmar Stahl