Patents by Inventor Friedrich B. Rombach

Friedrich B. Rombach 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).

  • Nozzle plate for ink jet print head
    Patent number: 4343013
    Abstract: The nozzle plate of an ink jet print head is made of glass to provide a desirable wetting property for a stable meniscus of the ink column and the front surface of the plate is coated with a non-wetting material such as metal or plastic to prevent ink deposits at the front surface around the orifice. Any ink deposits at such front surface would adversely affect the ejection of ink droplets.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: August 3, 1982
    Assignee: NCR Corporation
    Inventors: Leonhard Bader, Frank Giessner, Friedrich B. Rombach, Hermann Winter
  • Method of making ink jet print head
    Patent number: 4248823
    Abstract: A mold having a desired print head shape includes a cover in which a plurality of rods or ductile fibers are attached, the cover being positioned with the rods extending into the mold and to the side opposite the cover. A hardenable synthetic material is introduced through a hole in the cover and after hardening of the material to form the print head, the rods are withdrawn from the mold to leave bores or apertures in the print head which serve as passageways for the droplets of ink.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: February 3, 1981
    Assignee: NCR Corporation
    Inventors: Leonhard Bader, Frank Giessner, Ernst Pechinger, Friedrich B. Rombach, Wilhelm Ruprich, Helmut Weber, Hermann Winter