Patents by Inventor Richard W. Premo

Richard W. Premo 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).

  • High efficiency fuser roll assembly for xerographic material
    Patent number: 4109135
    Abstract: A high efficiency fuser and pressure roll system for fixing xerographic toner particles to a carrier medium such as paper is presented having a helical resistance coil bonded at the active cylindrical surface of the fuser roll; the surface located heater is thermally isolated from the shaft mechanism supporting the fuser roll. Quick heating of the surface is achieved, along with diminished heat loss by heat conduction into the shaft and associated parts of the copier. The heater being integral with the fuser roll, heat is transferred directly and efficiently from the heater to the toner material.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: August 22, 1978
    Assignee: Sperry Rand Corporation
    Inventors: Henry Thomas Minden, Richard W. Premo