Patents by Inventor Frank Lechner

Frank Lechner 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 and processing installation for devolatilizing polymer melts
    Patent number: 8388216
    Abstract: A processing installation for devolatilization of polymer melts comprises a first extruder and a second extruder arranged downstream thereof in a direction of conveyance. The first extruder comprises several rotatably drivable first shafts which are provided with first treatment members and several devolatilization zones with associated devolatilization ports. Correspondingly, the second extruder comprises several rotatably drivable second shafts which are provided with second treatment members and several second devolatilization zones with associated devolatilization ports. The first treatment members have an external diameter which is smaller than or equal to that of the second treatment members. A devolatilization unit is arranged in a transfer zone which interconnects the extruders. The devolatilization unit comprises a perforated plate and a clearance arranged downstream in the direction of conveyance.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: March 5, 2013
    Assignee: Coperion GmbH
    Inventors: Frank Lechner, Ulrich Conrad
  • METHOD AND PROCESSING INSTALLATION FOR DEVOLATILIZING POLYMER MELTS
    Publication number: 20110182132
    Abstract: A processing installation for devolatilization of polymer melts comprises a first extruder and a second extruder arranged downstream thereof in a direction of conveyance. The first extruder comprises several rotatably drivable first shafts which are provided with first treatment members and several devolatilization zones with associated devolatilization ports. Correspondingly, the second extruder comprises several rotatably drivable second shafts which are provided with second treatment members and several second devolatilization zones with associated devolatilization ports. The first treatment members have an external diameter which is smaller than or equal to that of the second treatment members. A devolatilization unit is arranged in a transfer zone which interconnects the extruders. The devolatilization unit comprises a perforated plate and a clearance arranged downstream in the direction of conveyance.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 28, 2011
    Applicant: Coperion GmbH
    Inventors: Frank LECHNER, Ulrich Conrad