Patents by Inventor Charles E. Hewitt

Charles E. Hewitt 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).

  • Fuser belts with improved release and gloss
    Patent number: 6007918
    Abstract: A fusing belt that comprises: a seamless polyimide substrate; and coated thereon, a surface layer comprising a hexafluoroisopropylidene-2,2-bis-phthalic anhydride (6F)/5(6)amino-(4-aminophenyl)-1,1,3-triimethylindane (Nv) polyimide and PDMS(6F/Nv-PDMS) block copolymer. A method of forming a fused toner image is also provided.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: December 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: Biao Tan, Jiann-Hsing Chen, Scott E. Tunney, Muhammed Aslam, Charles E. Hewitt
  • Low wrinkle performance fuser member
    Patent number: 5716714
    Abstract: This invention provides a fuser member comprising a core having a polymeric coating wherein said wrinkle index of said fuser member is less than 75, said wrinkle index (WI) being calculated by the following formula: ##EQU1## where: S is the stiffness of the core in megaPascals (MPa);T is the thickness of said polymeric coating in millimeters (mm); andH is the hardness (Shore A) of the polymeric coating.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: February 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Jiann H. Chen, William B. Vreeland, John E. Derimiggio, David F. Cahill, Charles E. Hewitt, Gary F. Roberts
  • Fusing member having zinc oxide-filled, addition cured layer
    Patent number: 5587245
    Abstract: A fuser member having a core and a layer overlying the core. The layer includes: an addition crosslinked polyorganosiloxane elastomer, and zinc oxide particles dispersed therein in a concentration of from 5 to 40 percent of the total volume of the layer.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: December 24, 1996
    Assignee: Eastman Kodak Company
    Inventors: Susan A. Visser, Charles E. Hewitt, Tonya D. Binga, Wayne T. Ferrar, Michael W. Fichtner, John J. Fitzgerald
  • Tin oxide filled dimethylsiloxane-fluoroalkylsiloxane fuser roll for fixing toner to a substrate
    Patent number: 5563202
    Abstract: A fuser member useful for heat-fixing an electrographic toner to a substrate, a composition of matter and a preparation method. The fuser member has a core and a base cushion layer overlying the core. The base cushion layer includes a crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer that has tin oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: October 8, 1996
    Assignee: Eastman Kodak Company
    Inventors: Wayne T. Ferrar, William B. Vreeland, Charles E. Hewitt, John J. Fitzgerald, Tonya D. Binga
  • Tin oxide filled dimethylsiloxane-fluoroalkylsiloxane fuser roll for fixing toner to a substrate
    Patent number: 5464703
    Abstract: A fuser member useful for heat-fixing an electrographic toner to a substrate, a composition of matter and a preparation method. The fuser member has a core and a base cushion layer overlying the core. The base cushion layer includes a crosslinked poly(dimethylsiloxane-fluoroalkylsiloxane) elastomer that has tin oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: November 7, 1995
    Assignee: Eastman Kodak Company
    Inventors: Wayne T. Ferrar, William B. Vreeland, Charles E. Hewitt, John J. Fitzgerald, Tonya D. Binga