Patents by Inventor James O. Griffith

James O. Griffith 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 roller
    Patent number: 4246842
    Abstract: A printing roller is provided wherein such roller comprises an inner layer and a concentric ink applying tubular outer layer made of a microporous rubber material having cavities interconnected by passages defining a first ink flow control means. The inner layer is made of a sintered mass of material having a reticulated open pore structure which is harder than the outer layer, and acts as a second ink flow control means to provide uniform inking. The layers cooperate to define a substantially rigid roller having a soft ink applying layer.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: January 27, 1981
    Assignee: Dayco Corporation
    Inventors: Leland E. Williams, James O. Griffith
  • Inking roller and apparatus and method for printing using such roller
    Patent number: 4024816
    Abstract: An inking roller is provided which has both inking and non-inking portions and which has substantially uniform deflection characteristics across its entire axial length; and, an improved apparatus and method for printing using such roller is also provided.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: May 24, 1977
    Assignee: Dayco Corporation
    Inventors: Leland E. Williams, James O. Griffith