Patents by Inventor Patsy A. Bowlds

Patsy A. Bowlds 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).

  • Modified resistive layer in thermal transfer medium having lubricating contact graphite coating
    Patent number: 4477198
    Abstract: A thermal ribbon having a minute coating of graphite powder on the outer side of the resistive layer. The improved electrical interface with print electrodes reduces ribbon and printhead damage. The graphite also reduces friction and loosens material which builds-up at the printhead.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: October 16, 1984
    Assignee: International Business Machines Corporation
    Inventors: Patsy A. Bowlds, David P. Dunn, Rex D. Fathergill, Hugh T. Findlay, Stafford, Donald W.
  • Silicon dioxide intermediate layer in thermal transfer medium
    Patent number: 4419024
    Abstract: Disclosed is a thermal transfer medium which comprises a mixture of a thermosetting polyimide, a thermoplastic polyimide, and graphite. It has a steel support layer and an intermediate layer of silicon dioxide. An outer layer on the steel is the thermal ink. The mixture is applied as a dispersion with a precursor of the thermosetting polyimide. The ribbon may be recoated at the typing station by applying a hot-melt of the ink.
    Type: Grant
    Filed: December 22, 1981
    Date of Patent: December 6, 1983
    Assignee: International Business Machines Corporation
    Inventors: Patsy A. Bowlds, Bruce M. Cassidy, Arthur E. Graham, Robert J. Huljak, Donald W. Stafford, Deh C. Tao