Coated carrier particle containing a charge control agent
AssigneeNashua Corporation
InventorWilfred E. Vail
Life of this patent
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Abstract
An improved carrier particle for use with a toner in electrostatic copying is described. The particle comprises an electroconductive core and a coating. In one embodiment the coating is made by combining a fluorocarbon resin with a charge control agent that has the same polarity as the toner. The carrier imparts a strongly positive triboelectric charge to the toner while resisting adhesion of toner particles.
Claims21
A carrier particle for use with a toner in electrostatic copying comprising:
- an electroconductive core;
- and
- a coating on said electroconductive core, said coating comprising a fluorocarbon resin and a charge control agent wherein said charge control agent has about the same polarity as said toner.
A carrier particle for use with a toner in electrostatic copying comprising:
- an electroconductive core;
- and
- a coating on said electroconductive core, said coating comprising a fluorocarbon resin, a plurality of electroconductive particles, and a charge control agent, wherein said charge control agent has about the same polarity as said toner.
A carrier particle for use with a toner in electrostatic copying comprising:
- an electroconductive core;
- and
- a coating on said electroconductive core, said coating comprising a polymeric resin and a charge control agent, wherein said charge control agent has about the same polarity as said toner.
A method for manufacturing an improved carrier particle for use in an electrostatic copying process, the method comprising the steps of:
- (a) providing an electroconductive core particle;
- and
- (b) coating the core particle with a resin, wherein the resin contains a charge control agent.
Dependencies are inferred from the claim text.