Patents by Inventor Herbert Lobl

Herbert Lobl 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).

  • Patent number: 4392194
    Abstract: A large number of printing electrodes are combined to form groups which each time have a common switching point, each printing electrode of the same ordinal number of each group being connected to a common voltage amplifier. A capacitor (C) is connected between the common switching point (G) of a group and the electrical control element (SK) associated with each printing electrode (BE). All capacitors are simultaneously charged, however, consecutively one group after the other, to the analog voltages which correspond to the information to be printed and which are present on the relevant voltage amplifiers (V). The time required for the charging of all capacitors (C) is less than the printing time for an image element. The circuit arrangement is particularly suitable for an electrophoretic printing method.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: July 5, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Hans D. Hinz, Herbert Lobl
  • Patent number: 4330788
    Abstract: The invention relates to a printing device for electrophoretic recording by means of electrodes which are relatively movable with respect to an image carrier. Between the image carrier and electrodes, a liquid developer fluid is present in which the electrodes are immersed. Recording takes place under the influence of a control voltage (U.sub.ST) causing adherence of electrophoretic pigment to the image carrier. In order to enable point-like (matrix-like) recording, the surface of the image carrier is electrically conductive and the developer fluid at the area of the electrodes is continuously exchanged to maintain the electrophoretic pigment supply.
    Type: Grant
    Filed: March 4, 1980
    Date of Patent: May 18, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Hans D. Hinz, Ulf Rothgordt, Herbert Lobl