Patents by Inventor John M. Choberka

John M. Choberka 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).

  • Dot matrix print head
    Patent number: 4362406
    Abstract: There is disclosed herein a dot matrix tilting print head assembly in which the print head is rotatably mounted in frame means. Solenoid means are provided for rotating the print head a controlled distance so that printing occurs between previously printed dots. Means are provided for controlling the distance to be one half of the center-to-center distance between printed dots. This entails maintaining very low tolerances for the mechanically moving parts. In addition, there is provided means for removing the print head alone from the frame means.
    Type: Grant
    Filed: May 14, 1981
    Date of Patent: December 7, 1982
    Assignee: International Business Machines Corp.
    Inventors: John M. Choberka, Donald K. Rex
  • Data matrix print head
    Patent number: 4284363
    Abstract: There is disclosed herein a dot matrix tilting print head assembly in which the print head is rotatably mounted in a frame. A solenoid is provided for rotating the print head a controlled distance so that printing occurs between previously printed dots. A pin extending from the print head is positioned into a larger diameter hole in the frame for controlling the distance to be one half of the center-to-center distance between printed dots. This entails maintaining very low tolerances for the mechanically moving parts. In addition, there is provided support members for allowing the removal of the print head alone from the frame means.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: August 18, 1981
    Assignee: International Business Machines Corp.
    Inventors: John M. Choberka, Donald K. Rex