Patents by Inventor David J. Leitch

David J. Leitch 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).

  • Printing machine system, especially for printing on a web of heavy or thick stock material, with interchangeable printing cylinders
    Patent number: 5186103
    Abstract: To permit ready exchange of plate cylinder (13) - blanket cylinder (12) printing couples of different circumferences in a printing machine, the blanket cylinder - plate cylinder printing couple is retained in a cassette (8), with adjustment elements (282, 281, 26) to control the throw-off position of the blanket cylinder in the cassette. The adjustment elements are selectively engageable or disengageable against matching adjustment elements (284, 283) in the printing tower (9). The printing tower adjustably supports an impression cylinder (11) located above the blanket cylinder, when the cassette is installed in the tower, so that printing will be from below. Ink application rollers (361, 362, 363) are force-biassed against the respective plate cylinders, and movable in a slide path which is radial with respect to the plate cylinder of the respective diameter, under control of slide feelers (161, 162, 163) engaging a stationary ring (213) in the cassette concentric with the plate cylinder.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: February 16, 1993
    Assignee: Man Roland Druckmaschinen AG
    Inventors: W. Robert Gelinas, Arthur J. Leale, David J. Leitch, John J. Mellow, George Rinaudo, Ernest H. Treff