Patents by Inventor Dennis E. DeMeyer

Dennis E. DeMeyer 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).

  • Electrostatographic apparatus and method with programmable toner concentration decline with the developer life
    Patent number: 6118953
    Abstract: In an electrostatographic process and apparatus a replenishment device adds toner particles to a development station that includes a developer comprising a mixture of toner particles and carrier particles. A reference parameter that is used in control of aim point of toner concentration in the mixture is set to an initial value until about a midlife of the developer is reached. Once the midlife of the developer is reached there are provided programmed step adjustments in the reference value in accordance with further increases in life of the developer to thereby control replenishment of toner particles so that control of charge to mass of the toner particles in the mixture is provided to reduce a tendency of dusting by the toner particles of the mixture due to age of the developer.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: September 12, 2000
    Assignee: Eastman Kodak Company
    Inventors: David E. Hockey, Dennis E. DeMeyer, Kevin D. Lofftus, Paul L. Nielsen
  • Method of developing electrostatic images
    Patent number: 5705307
    Abstract: A method of developing electrostatic images with a two component developer avoids the break-in period of developer by providing a fresh mixture of carrier and toner, which toner has a first particle size but replenishes the mixture in use with toner having a second particle size larger than the first particle size. This compensates for the tendency of electrostatic images to preferentially attract the larger particles in a toner mixture.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: January 6, 1998
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Dennis E. Demeyer, James H. Anderson
  • Stabilized carriers with .beta. phase poly(vinylidenefluoride)
    Patent number: 5516615
    Abstract: A method for converting .alpha.-phase poly(vinylidene fluoride) to .beta.-phase poly(vinylidene fluoride), for preparing electrostatographic carrier and, electrostatographic developer and carrier. In the method for preparing electrostatographic carrier, uncoated electrostatographic carrier particles are coated with .alpha.-phase poly(vinylidene fluoride) to provide .alpha.-phase poly(vinylidene fluoride) coated carrier particles. A measurable portion of the .alpha.-phase poly(vinylidene fluoride) is then converted to .beta.-phase poly(vinylidene fluoride) by subjecting the .alpha.-phase poly(vinylidene fluoride) to a series of viscoelastic collisions having a total energy of from about 5.times.10.sup.4 to about 5.times.10.sup.5 Joules/kilogram of poly(vinylidene fluoride).
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: May 14, 1996
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, James H. Anderson, Dennis E. DeMeyer