Patents by Inventor Dieter Guls

Dieter Guls 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).

  • Letterpress printing plate having printing surfaces with a low surface tension, and method of making
    Patent number: 5396841
    Abstract: A letterpress printing method is disclosed wherein a printing plate, having plastic surface with a critical surface tension in the range of approximately 18-35 mN/m, is engraved or otherwise provided with raised ink-bearing impression sites and the printing plate is used for printing in a letterpress printing machine. As examples, the plastic surface of the printing plate may comprise a fluoropolymer, polytetrafluoroethylene or a copolymer of tetrafluoroethylene and hexafluoropropylene. The low surface tension is shown to enhance the printing quality in this environment.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: March 14, 1995
    Assignee: Bonner Zeitungsdruckerei und Verlangsanstalt H. Neusser GmbH & Co. KG
    Inventor: Dieter Guls