Patents by Inventor Peter Petermann

Peter Petermann 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 apparatus to produce paper webs coated on both sides
    Patent number: 6599395
    Abstract: A method of producing paper webs coated on both sides includes the following steps: a) indirectly applying a liquid onto the paper web by passing the web through at least one nip formed by a roll and a counterelement, whereafter the web is dried; b) next, directly applying coating mixture at surplus only on one side of the web, whereafter the surplus coating mixture is removed again by use of a doctor element, the web being dried again thereafter; and c) lastly, directly applying coating mixture at surplus only on the other web side, whereafter the surplus coating mixture is removed by use of a doctor, whereafter the web is dried again. In the indirect application of liquid in the nip, or in the nips, either coating mixture to produce so-called MWC papers or a sizing suspension to produce so-called LWC papers is selectively applied.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: July 29, 2003
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Hans-Jürgen Wulz, Rüdiger Kurtz, Gerhard Kotitschke, Bernhard Kohl, Peter Petermann, Erhard Gruber
  • Method and apparatus to produce paper webs coated on both sides
    Publication number: 20020060009
    Abstract: A method of producing paper webs coated on both sides includes the following steps: a) indirectly applying a liquid onto the paper web by passing the web through at least one nip formed by a roll and a counterelement, whereafter the web is dried; b) next, directly applying coating mixture at surplus only on one side of the web, whereafter the surplus coating mixture is removed again by use of a doctor element, the web being dried again thereafter; and c) lastly, directly applying coating mixture at surplus only on the other web side, whereafter the surplus coating mixture is removed by use of a doctor, whereafter the web is dried again. In the indirect application of liquid in the nip, or in the nips, either coating mixture to produce so-called MWC papers or a sizing suspension to produce so-called LWC papers is selectively applied.
    Type: Application
    Filed: August 28, 2001
    Publication date: May 23, 2002
    Applicant: Voith Sulzer Papiermaschinen GmbH.
    Inventors: Hans-Jurgen Wulz, Rudiger Kurtz, Gerhard Kotitschke, Bernhard Kohl, Peter Petermann, Erhard Gruber
  • Method and apparatus to produce paper webs coated on both sides
    Patent number: 6284097
    Abstract: A method of producing paper webs coated on both sides includes the following steps: a) indirectly applying a liquid onto the paper web by passing the web through at least one nip formed by a roll and a counterelement, whereafter the web is dried; b) next, directly applying coating mixture at surplus only on one side of the web, whereafter the surplus coating mixture is removed again by use of a doctor element, the web being dried again thereafter; and c) lastly, directly applying coating mixture at surplus only on the other web side, whereafter the surplus coating mixture is removed by use of a doctor, whereafter the web is dried again. In the indirect application of liquid in the nip, or in the nips, either coating mixture to produce so-called MWC papers or a sizing suspension to produce so-called LWC papers is selectively applied.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: September 4, 2001
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Hans-Jürgen Wulz, Rüdiger Kurtz, Gerhard Kotitschke, Bernhard Kohl, Peter Petermann, Erhard Gruber