Coated carrier particles for use in electrophotographic process
AssigneeAddressograph Multigraph Corporation
InventorsEvan Serge Baltazzi, Pabitra Datta
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Abstract
Carrier particles for use in an electrophotographic process are prepared by coating a particulate matrix with an ion exchange resin dispersed in a polymeric binder. The resulting coated carrier particles are long lived and depending upon the choice of ion exchange resin can be used to impart a positive or negative triboelectric charge of the magnitude desired to electroscopic powders mixed therewith.
Claims10
A process for developing a visual image from a latent electrostatic image which comprises applying to the surface upon which is formed the latent electrostatic image a developer mix comprising a finely divided electroscopic powder and discrete solid carrier particles selected from the group consisting of glass beads, ceramic beads, grains of sand and metallic particles, coated with a dispersion in a low surface energy thermoplastic polymeric binder of dried, finely ground particles in the micron to submicron range of a polymer consisting essentially of a backbone of a highly crosslinked copolymer of styrene and divinylbenzene having ion exchanging groups chemically bonded thereto;
- said coating being about from 1 micron to 3 microns in thickness.
Dependencies are inferred from the claim text.