Patents by Inventor Wilhelm Ruprich

Wilhelm Ruprich 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 making a drive element assembly for ink jet printing
    Patent number: 4493137
    Abstract: Described is a piezoelectric drive element assembly for use in ink jet printer devices. The assembly comprises a piezoelectric drive element, which is characterized by a pair of electrodes spaced apart and thereby electrically isolated from one another on an external lateral face of the drive element. The assembly further includes a printed circuit board having holes through which the drive element is fitted, with the electrodes of the drive element being soldered to opposite sides of the printed circuit board.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: January 15, 1985
    Assignee: NCR Corporation
    Inventors: Leonhard Bader, Ferdinand Hermann, Wilhelm Ruprich, Hermann Winter
  • Ink jet print head with tilting nozzle
    Patent number: 4376944
    Abstract: In ink jet printing, the ink droplets formed at the nozzle of the print head are selectively guided by tilting the nozzle against a resilient portion of the print head and relative to the normal ink droplet propelling direction. The tilting movement is accomplished by an electromagnet or by using conductive wires operably associated with permanent magnet plates in an arrangement such that the pivot of the tilting movement is located at the center of the orifice through the nozzle.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: March 15, 1983
    Assignee: NCR Corporation
    Inventors: Peter H. Reitberger, Wilhelm Ruprich
  • 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is introduced through a hole in the cover and after hardening of the material to form the print head, the rods are withdrawn from the mold to leave bores or apertures in the print head which serve as passageways for the droplets of ink.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