Patents by Inventor Michael Von Grumbkow

Michael Von Grumbkow 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: 5707489
    Abstract: A method of processing recycled paper which contains such a high amount of wax, hot melts or stickies that they would be expected to cause a stoppage of the paper-manufacturing machine. The paper to be recycled is pulped in a pulper and passed on to respective subsequent stages which include a despecker, grader and hydrocyclone. Pulping takes place at a temperature of at least 60.degree. C., and at the same time subjects the paper to a high shear action. The processing line includes a pulp-thickening stage, preferably after the processing stages mentioned, in order to separate off a very high proportion of the wax, hot melts and stickies finely dispersed in the pulper.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: January 13, 1998
    Assignee: J.M. Voith GmbH
    Inventors: Michael Von Grumbkow, Helmut Konecsny