Patents by Inventor Lother Pfalzer

Lother Pfalzer 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).

  • Process and apparatus for preparing waste paper for reuse
    Patent number: 4360402
    Abstract: A process and apparatus for preparing waste paper for reuse in a paper machine. Waste paper, water and de-inking chemicals are introduced to coarse pulping apparatus, and the coarsely pulped stock suspension is then thickened by filtration and treated in a reaction tower. The pulp is then thinned and passed through flotation apparatus to remove separated impurities, particularly printing inks. Water removed from the pulp in the thickening operation is passed through second flotation apparatus with the clean water therefrom being reintroduced to the apparatus.
    Type: Grant
    Filed: March 27, 1979
    Date of Patent: November 23, 1982
    Assignee: J. M. Voith GmbH
    Inventors: Herbert Ortner, Lother Pfalzer, Siegbert Fischer