Patents by Inventor Robert J. Mahr

Robert J. Mahr 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 and apparatus for printing raised ink images
    Patent number: 4152986
    Abstract: A method of printing a raised ink image on a substrate for use as a hectographic or spirit duplicating master or the like involving forming a printing plate having a raised image area thereon, the latter having a plurality of regularly spaced, screen-like depressions therein for increasing the amount of the ink carried by the raised image area. The plate is mounted on the plate roll of a rotary press and ink is applied to the plate. The plate and the sustrate are then brought into printing engagement with one another and a raised ink image is transferred to the substrate.Apparatus for carrying out the above-described method and details of the printing plate are also disclosed.
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: May 8, 1979
    Inventors: Gilbert F. Dadowski, Robert J. Mahr, Stanley P. Drachman