Coated carrier particles for use in electrophotographic process
AssigneeAddressograph Multigraph Corporation
InventorVirgil William Westdale
Life of this patent
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Abstract
Carrier particles for use in an electrophotographic process are prepared by applying a mixture of a perfluoro acid and polyvinylidene fluoride to the surface of the carrier particle. The resulting carriers are long lived, abrasion resistant and capable of imparting a high triboelectric charge to electroscopic powders mixed therewith.
Claims10
A carrier for use in electrophotographic development of latent electrostatic images capable of inducing an electrostatic charge in a toner mixed therewith which comprises a member selected from the group consisting of metallic particles and siliceous particles to the surface of which is adhered a mixture of polyvinylidene fluoride and a member selected from the group consisting of perfluorinated and substantially perfluorinated carboxylic acids containing from 3 to 18 carbon atoms and esters and amides thereof, said polyvinylidene fluoride and acid being present in a ratio by weight of about 0.2:1 to 8:1.
Dependencies are inferred from the claim text.