Patents by Inventor Archibald E. Palmer

Archibald E. Palmer 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 plate inspection apparatus
    Patent number: 4149187
    Abstract: A printing plate inspection apparatus for inspecting the dot profile of photo-engraved printing plates having a length of opaque material having a straight edge which is placed adjacent the surface to be inspected with a light source to light the surface on one side of the straight edge, and a viewing device on the other side of the straight edge to receive the light reflected from the surface under the straight edge to determine the dot profile.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: April 10, 1979
    Assignee: John Fairfax & Sons Limited
    Inventors: Archibald E. Palmer, Raymond G. Macquart, Risto T. T. Karaiste