Patents by Inventor Russel E. Wellman

Russel E. Wellman 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).

  • Thermal imaging ribbon including a partially crystalline polymer
    Patent number: 4687360
    Abstract: A thermal transfer ribbon comprising a substrate and an ink layer is disclosed. The ink layer comprises a partially crystalline polymer which becomes soft at a time when the crystalline portion begins to melt, the polymer derived from an acid containing at least one carboxylic acid moiety.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: August 18, 1987
    Assignee: Pitney Bowes Inc.
    Inventors: Russel E. Wellman, Phyllis A. Cuming
  • Thermal transfer ribbon including an amorphous polymer
    Patent number: 4684271
    Abstract: A ribbon for thermal transfer printing is disclosed. The ribbon comprises a substrate and an inking layer, the inking layer comprising low molecular weight polymer, a colorant, and an amorphous polymer.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: August 4, 1987
    Assignee: Pitney Bowes Inc.
    Inventors: Russel E. Wellman, Phyllis A. Cuming
  • Toner additives
    Patent number: 4299899
    Abstract: Disclosed is the use of a novel diester as an additive to a toner, the ester being of the formula: ##STR1## wherein R is of the formula ##STR2## being independently selected from the group consisting of phenyl, substituted phenyl, aliphatic and substituted aliphatic.In one embodiment a toner containing this additive is used in a flash fusing system whereby it acts as a stabilizer thus eliminating decomposition of the toner. The additive can also be used to lower the toner melt viscosity and the fusing temperature of the toner.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: November 10, 1981
    Assignee: Xerox Corporation
    Inventors: Jack C. Azar, Russel E. Wellman
  • Encapsulation process
    Patent number: 4187194
    Abstract: A process for forming capsules comprising:(i) forming a solution of wall material and core material in a solvent;(ii) admixing said solution with an immiscible liquid to form a dispersion wherein said solution is the dispersed phase and the immiscible liquid is the continuous phase;(iii) altering the solubility characteristics of the solvent for said solution to effect sequential phase separation of said core and wall materials, respectively, thereby forming capsules of core material encapsulated with wall material; and(iv) recovering said capsules.
    Type: Grant
    Filed: February 7, 1974
    Date of Patent: February 5, 1980
    Assignee: Xerox Corporation
    Inventors: Russel E. Wellman, Robert W. Brown
  • Method of forming encapsulated toner particles
    Patent number: 4016099
    Abstract: A method is provided for forming encapsulated particles comprising forming a dispersion of core material in a solution of wall material in a solvent; drowning said dispersion in at least one liquid which is miscible with the solvent and in which at least the wall material is substantially insoluble, to effect phase-separation of said wall material, whereby said wall material deposits about said core material forming a dilute dispersion of particles comprising said core material encapsulated with said wall material in said liquid, and recovering said encapsulated particles from said liquid.
    Type: Grant
    Filed: March 27, 1972
    Date of Patent: April 5, 1977
    Assignee: Xerox Corporation
    Inventors: Russel E. Wellman, Robert W. Brown