Patents Examined by Michael L. Espedal
  • Electrostatographic development
    Patent number: 4027048
    Abstract: A toner in which at least a major portion of the resin component is a soft polymer encapsulated and dispersed in a tough polymer matrix in a plurality of discrete domains, instead of as a single core. A convenient method of providing such dispersion is by the use of a block, graft or shaded copolymer, as a dispersing agent, comprised of components which are identical to the soft and tough polymers. The toner is pressure fixable.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: May 31, 1977
    Assignee: Xerox Corporation
    Inventor: Richard G. Crystal