Patents by Inventor Siegfried Rapp

Siegfried Rapp 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).

  • Method for the stabilization of folded filter media and a filter medium stabilized by said method
    Patent number: 8157938
    Abstract: In a method for stabilizing folded filter media, a thread is coated with a hot melt adhesive to prepare a coated thread. The coated thread is wound in a plastic state about fold tips of a folded filter medium. The plastic state of the coated thread is maintained by applying heat. The heat is applied in the form of hot air, infrared radiation, or generated by microwaves.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: April 17, 2012
    Assignee: Mann+Hummel GmbH
    Inventors: Jobst Eisengräber-Pabst, Siegfried Rapp, Pius Trautmann, Johannes Lampert
  • Method for the Stabilization of Folded Filter Media and a Filter Medium Stabilized by Said Method
    Publication number: 20090200228
    Abstract: In a method for stabilizing folded filter media, a thread is coated with a hot melt adhesive to prepare a coated thread. The coated thread is wound in a plastic state about fold tips of a folded filter medium. The plastic state of the coated thread is maintained by applying heat. The heat is applied in the form of hot air, infrared radiation, or generated by microwaves.
    Type: Application
    Filed: July 19, 2006
    Publication date: August 13, 2009
    Applicant: MANN+HUMMEL GmbH
    Inventors: Jobst Eisengräber-Pabst, Siegfried Rapp, Pius Trautmann, Johannes Lampert
  • Device for folding a web of material
    Patent number: 6290635
    Abstract: An apparatus and method for producing a zig-zag folded filter element from a web of material (18), which is supplied through a feeding device to a stamping unit (10). To define the folding line, the stamping unit is fitted with an anvil roll (21) and a stamping die (24), the stamping unit being ultrasound activated and thereby improving the stamping operation.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: September 18, 2001
    Assignees: Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung E.V., Filterwerk Mann & Hummel GmbH
    Inventors: Joerg Demmel, Andreas Levermann, Siegfried Rapp
  • Filter insert
    Patent number: 5618324
    Abstract: A filter insert for the filtering of the fresh air supplied to a motor vehicle interior has an accordion-folded filter element which is self-supporting. Lateral strips coated with an adhesive are provided on the faces which extend on the left and on the right. On the faces which extend in parallel to the folding, angle strips are arranged whose first leg extends along at least three fold edges. The filter element is surrounded along the faces by a foamed-material sealing.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: April 8, 1997
    Assignee: Filterwerk Mann & Hummel GmbH
    Inventors: Bruno Sommer, Helmut Luka, Thomas Sch urg, Siegfried Rapp, Nikolaus Moser