Patents by Inventor Michael Pappert

Michael Pappert 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).

  • Extrusion head
    Patent number: 7374412
    Abstract: In an extrusion head and an extrusion method for the production of a tubular multilayer preform the extrusion head includes at least two feed paths for feeding plasticised plastic material from one or more extruders to an annular passage arrangement. The annular passage arrangement includes mutually concentric annular passages forming mutually separate flow paths for the various layers of the preform. An annular gap nozzle has an annular gap communicating with the annular passage arrangement, and at least one flow passage communicates with an annular passage of the annular passage arrangement, for the introduction of a translucent viewing strip. The flow passage communicates with the annular passage in question upstream of the annular gap in the region of separation of the flow paths.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: May 20, 2008
    Assignee: Kautex Maschinenbau GmbH
    Inventors: Martin Balzer, Willi Doehmen, Heinz-Werner Eckerskorn, Lutz Forst, Peter Kluesener, Roger Stehr, Michael Pappert
  • Process for producing dish-shaped moldings of thermoplastic material
    Patent number: 7175791
    Abstract: A process for the production of dish-shaped moldings or hollow bodies of thermoplastic material comprises the step of producing an at least approximately tubular preform by the extrusion of thermoplastic material. The preform is axially divided to form at least one single-layer web of material which is removed from the extrusion head by being engaged by means of a manipulator which spreads and/or straightens the web transversely with respect to the extrusion direction. The web is then transferred to a molding tool by a manipulator for it to be put into its final form in its first heat in the molding tool.
    Type: Grant
    Filed: February 10, 2003
    Date of Patent: February 13, 2007
    Assignee: Kautex Maschinenbau GmbH
    Inventors: Michael Pappert, Alfred Jira, Andreas Hollweg, Wolfgang Kummer, Peter Klusener
  • Extrusion head and extrusion method
    Publication number: 20040183224
    Abstract: In an extrusion head and an extrusion method for the production of a tubular multilayer preform the extrusion head includes at least two feed paths for feeding plasticised plastic material from one or more extruders to an annular passage arrangement. The annular passage arrangement includes mutually concentric annular passages forming mutually separate flow paths for the various layers of the preform. An annular gap nozzle has an annular gap communicating with the annular passage arrangement, and at least one flow passage communicates with an annular passage of the annular passage arrangement, for the introduction of a translucent viewing strip. The flow passage communicates with the annular passage in question upstream of the annular gap in the region of separation of the flow paths.
    Type: Application
    Filed: March 22, 2004
    Publication date: September 23, 2004
    Inventors: Martin Balzer, Willi Doehmen, Heinz-Werner Eckerskorni, Lutz Forst, Peter Kluesener, Roger Stehr, Michael Pappert
  • Process for producing dish-shaped moldings of thermoplastic material
    Publication number: 20030164572
    Abstract: A process for the production of dish-shaped moldings or hollow bodies of thermoplastic material comprises the step of producing an at least approximately tubular preform by the extrusion of thermoplastic material. The preform is axially divided to form at least one single-layer web of material which is removed from the extrusion head by being engaged by means of a manipulator which spreads and/or straightens the web transversely with respect to the extrusion direction. The web is then transferred to a molding tool by a manipulator for it to be put into its final form in its first heat in the molding tool.
    Type: Application
    Filed: February 10, 2003
    Publication date: September 4, 2003
    Inventors: Michael Pappert, Alfred Jira, Andreas Hollweg, Wolfgang Kummer, Peter Klusener
  • Double-wall fuel container
    Patent number: 6612458
    Abstract: A double-wall fuel container of plastic material is composed of at least two shell portions which are welded together. The half-shell portions are each in the form of double-wall blow moldings, with a gap being kept free at least in a region-wise manner between the walls of the blow moldings.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: September 2, 2003
    Assignee: SIG Kautex GmbH & Co. KG
    Inventors: Martin Balzer, Dieter Hess, Werner Daubenbuechel, Michael Pappert, Roger Stehr, Peter Kluesener
  • Double-wall fuel container
    Publication number: 20020053568
    Abstract: A double-wall fuel container of plastic material is composed of at least two shell portions which are welded together. The half-shell portions are each in the form of double-wall blow moldings, with a gap being kept free at least in a region-wise manner between the walls of the blow moldings.
    Type: Application
    Filed: November 6, 2001
    Publication date: May 9, 2002
    Applicant: SIG Blowtech GmbH & Co., KG
    Inventors: Martin Balzer, Dieter Hess, Werner Daubenbuechel, Michael Pappert, Roger Stehr, Peter Kluesener