Non-filming dual additive developer
AssigneeXerox Corporation
InventorDonald J. Fisher
Life of this patent
Estimating the term…
Abstract
An imaging technique and composition for developing electrostatographic latent images is given whereby a developer composition is employed comprising toner, a substantially smearless polymeric additive, and an abrasive material.
Claims13
An electrostatographic developing composition comprising particles;
- said particles including (1) finely divided electroscopic toner material, (2) a minor portion, based upon the weight of said toner material of a stable, tough, substantially smearless, polymeric additive having an average particle size less than about the average particle size of said finely divided toner material, and (3) a minor portion, based on the weight of said toner material, of a finely divided nonsmearable abrasive material of a hardness greater than said polymeric additive and said toner material.
An electrostatographic developing composition comprising particles;
- said particles including (1) finely divided electroscopic resin toner material, (2) a minor portion, based upon the weight of said toner material of a stable, tough, substantially smearless, polymeric additive having an average particle size less than about the average particle size of said finely divided toner material, said polymeric additive particles of a resin other than the resin of said toner material, and (3) a minor portion, based on the weight of said toner material, of a finely divided nonsmearable abrasive material of a hardness greater than said polymeric additive and said toner material.
An electrostatographic developing composition comprising particles;
- said particles including (1) finely divided electroscopic toner material, (2) from about 0.1 to about 10 percent, based upon the weight of said toner material of a stable, tough, substantially smearless, polymeric additive selected from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylchloride, polyvinylidine chloride, polyethylene, polypropylene, chlorinated polyethylene, chlorinated polyether, copolymers of tetrafluoroethylene and chlorotrifluoroethylene, copolymers of tetrafluoroethylene and hexafluoropropylene, copolymers of tetrafluoroethylene and vinylidine fluoride, copolymers of chlorotrifluoroethylene and vinylidine fluoride, copolymers of vinyl chloride and vinyl fluoride, copolymers of vinyl chloride and polyethylene, copolymers of vinyl chloride and polypropylene, and mixtures of the same having an average particle size less than about the average particle size of said finely divided toner material and (3) from about 0.01 to about 5 percent based upon on the weight of said toner material, of a finely divided nonsmearable abrasive material of a hardness greater than said polymeric additive and said toner material.
A dry developer composition for electrostatographic image development comprising a toner of finely divided particles of a resin, an additive in an amount of from 0.1 to about 10 percent by weight of said toner of particles of a synthetic resin other than the resin of said toner, and an abrasive in an amount of from about 0.01 to about 5 percent by weight of said toner, said particles of additive and abrasive having an average size smaller than that of said toner particles, said particles of additive being at least one synthetic resin selected from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylchloride, polyvinylidine chloride, polyethylene, polypropylene, chlorinated polyethylene, chlorinated polyether, copolymers of tetrafluoroethylene and chlorotrifluoroethylene, copolymers of tetrafluoroethylene and hexafluoropropylene, copolymers of tetrafluoroethylene and vinylidine fluoride, copolymers of chlorotrifluoroethylene and vinylidine fluoride, copolymers of vinyl chloride and finyl fluoride, copolymers of vinyl chloride and polyethylene, copolymers of vinyl chloride and polypropylene, and mixtures of the same, and said particles of abrasive being selected from the group consisting of colloidal silica, surface modified organophilic silica, aluminum silicate, surface treated aluminum silicate, titanium dioxide, alumina, calcium carbonate, antimony trioxide barium titanate, calcium titanate, strontium titanate, CaSiO.sub.3, MgO, ZnO, ZrO.sub.2, and mixtures thereof.
Dependencies are inferred from the claim text.