Patents by Inventor Nancy C. Watkins

Nancy C. Watkins 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).

  • Single laminated element for thermal printing and lift-off correction, control therefor, and process
    Patent number: 4384797
    Abstract: A ribbon (22) in thermal printing has an outer layer (50) which adheres to printed characters at somewhat elevated temperatures but is non-tacky at room temperatures. The embodiment has an active layer of an ethylene vinyl acetate copolymer, an acrylic polymer, and carbon black. Thermal printing is conducted from the preferred ribbon by setting the switch (44) for heating to temperatures higher than the lift-off temperature. Lift-off is accomplished by returning to the printing position of the error and setting the switch (44) for lower voltage to the printing electrodes (9). The guide (29) allows cooling so that the bond is set before the ribbon (22) is pulled away.
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: May 24, 1983
    Assignee: International Business Machines Corporation
    Inventors: Clifford W. Anderson, Hugh T. Findlay, Nancy C. Watkins