Patents by Inventor Richard Prehler

Richard Prehler 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: 6736624
    Abstract: The invention relates to a spinning device in which liquid polymer is guided through a polymer line with a first heating jacket to a spinning pump with a second heating jacket. From said spinning pump, the polymer is transported through several lines to spinning packets and extruded through spinnerts to form filaments. The lines that are connected downstream of the spinning pump, the spinning packets and the spinnerets are located in at least one spinning housing through which heating fluid flows. There is a distance of 5 mm between the spinning housing through which the heating fluid flows and the first and second heating jackets and the spinning pump, to obtain thermal decoupling. According to a method for heating the spinning device, vaporous heating fluid is guided out of a first reservoir into the spinning housing, and heating fluid is guided out of a second reservoir into the first and/or second heating jacket.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: May 18, 2004
    Assignee: Zimmer Aktiengesellschaft
    Inventors: Rainer Tietze, Heinz-Dieter Beeck, Thomas Gries, Werner Mrose, Richard Prehler
  • Patent number: 4437827
    Abstract: A spinning manifold for melt-spinning synthetic high polymers is disclosed. The manifold has an elongated hollow body with cavities for the conduction of a heating medium, such as diphenyl, and a vertical nozzle shaft having heatable members placed between serially arranged and dismountable nozzle blocks such that the side walls of the heatable members are in heat exchange with adjacent nozzle blocks. These heatable members are displaceably mounted within the nozzle shaft. The pump shaft of the spinning manifold may also have additional heatable members placed between the pumping units. The same heating medium that flows through the cavities of the spinning manifold is placed within the heatable members.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: March 20, 1984
    Assignee: Davy McKee Aktiengesellschaft
    Inventors: Helmut Moderlak, Gunter Koschinek, Rolf Zinsser, Richard Prehler, Bernd Kretschmann