Patents by Inventor Werner Pappert

Werner Pappert 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 of depositing a protective surface layer on a very thin metal sheet
    Patent number: 4223047
    Abstract: A method of depositing an oil containing protective surface layer on a very thin metal sheet preferably intended for packing purposes. The very thin metal sheet, in the form of a band and at a band speed of up to 600 m/min, is electrostatically coated with a mixture comprising 1 to 2 parts of an ester of sebacic acid, azelaic acid, or citric acid, and 1 part of a high molecular monobasic acid having the general formula CH.sub.3 (CH.sub.2).sub.n CON(CH.sub.3)CH.sub.2 COOH. The coating is formed in a layer of 1 to 10 mg/m.sup.2 of surface of the metal sheet.
    Type: Grant
    Filed: July 12, 1978
    Date of Patent: September 16, 1980
    Assignee: Hoesch Werke Aktiengesellschaft
    Inventors: Werner Pappert, Ulrich Tenhaven, Friedrich Wolff