Patents by Inventor Harry Boyd

Harry Boyd 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).

  • Perforating strip for printing presses
    Patent number: 4972747
    Abstract: An improved perforating strip for use on printing presses formed of an elongated thin metal strip having a base portion of generally rectangular cross-section with flat upper and lower surfaces, the strip having integral upstanding teeth adjacent one edge, the edge of the strip opposite the teeth being curved from the lower surface to the upper surface providing a rounded edge which serves to substantially decrease the impression made in paper against which the strip is pressed, an in one embodiment the strip having an integral anchor portion downwardly extending from the edge opposite the teeth to penetrate the surface of a printing press impression cylinder.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: November 27, 1990
    Inventors: Harry Boyd, David Boyd
  • Perforating strip for printing presses
    Patent number: 4962686
    Abstract: An improved perforating strip for use on printing presses formed of an elongated thin metal strip having a base portion of generally rectangular cross-section with flat upper and lower surfaces, the strip having integral upstanding teeth adjacent one edge, the edge of the strip opposite the teeth being curved from the lower surface to the upper surface providing a rounded edge which serves to substantially decrease the impression made in paper against which the strip is pressed, and in one embodiment the strip having an integral anchor portion downwardly extending from the edge opposite the teeth to penetrate the surface of a printing press impression cylinder.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: October 16, 1990
    Inventors: Harry Boyd, David Boyd