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7553597 Carrier core material, coated carrier, and two-component developing agent for electrophotography  
A carrier core material containing at least one metal oxide (M L O) having a melting point of not higher than 1000° C. and at least one metal oxide (M H O) having a melting point of not lower than...
7172846 Carrier, developer, image forming apparatus and process cartridge  
A carrier including a manganese ferrite core material having a layer on its surface such that 0.1≦K≦30, where K=(S/M)×100, S and M represent the standard deviation and average of M 2/ (M 1 +M...
6864031 Electrophotographic developer and image-forming method using the developer  
The present invention provides an electrophotographic developer which reduces toner contamination on the surface of a developer carrier even when a development effective range is narrowed and which...
6464797 Method of separating electrophotographic carrier compositions and recycling the compositions  
A method for use in two-components electrostatic image developers is disclosed, in which secure separation of a carrier coating resinous materials from a core magnetic material is achieved without...
6258501 Developing agent and image forming apparatus  
Disclosed is a two-component developing agent comprising toner which includes a second magnetic powder added in an amount of 4 wt % or less with respect to the weight of toner particles which...
5994016 Dry developer for developing electrostatic latent image  
A color developer is described that contains a toner and a resin-coated carrier, wherein the toner contains a hydrophobic particulate titania and a charge controlling agent, and the charge...
5885741 Carrier for electrostatic latent image development and coating agent for use therein  
A coating agent for a carrier for electrostatic latent image development comprised of (A) an organopolysiloxane having the formula (R 3 SiO 1 /2) a (R 2 SiO 2 /2) b (RSiO 3 /2) c , wherein R is...
5885739 Colored toner and developer compositions  
Toners comprised of a cyan toner, a magenta toner, a yellow toner, an orange toner, or a red toner, and a black toner, each of said toners being comprised of resin and pigment; and wherein the...
5763229 Toner for developing electrostatic latent image  
A toner for electrophotography including toner particles containing at least a binder resin and a colorant, and a fluidizing agent added externally to the toner particles for mixture therewith,...
5683844 Fibrillated carrier compositions and processes for making and using  
A carrier comprised of a core with a coating thereover comprised of at least one polymer resin and wherein the outer surface of the coated carrier is fibrillated.
5654120 Magnetic carrier for electrophotography  
The disclosure describes a magnetic carrier for electrophotography having a number-average particle diameter of 1 to 1000 μm, and comprising ferromagnetic iron compound particles, non-magnetic...
5620820 Four color toner set  
Toners comprised of a mixture of a cyan toner, a magenta toner, a yellow toner, and a black toner each of said toners being comprised of resin and pigment, and wherein the pigment for the cyan...
5614346 Metal oxide- and metal-coated carriers for electrophotography  
Carriers for electrophotography, based on magnetic cores coated with metal oxide and with metal or magnetite, and their preparation and their use for electrophotographic two-component developers.
5595851 Conductive developer compositions with coated carrier particles  
A conductive carrier composition comprised of a core with a coating thereover comprised of a mixture of first and second polymers, and wherein the first polymer contains a conductive component, and...
5582951 Carrier processes  
A process for the preparation of carrier particles which comprises mixing a dispersion of water, submicron magnetic particles, and ionic surfactant with a latex comprised of resin particles...
5567561 Coating agents for electrophotography and electrophotography carriers prepared by using them  
Coating agents for electrophotography carriers are disclosed which are resistant to wear, peel-off, cracks, and prevent the occurrence of a spent phenomenon, and which possess a durability for a...
5565291 Carrier for use in electrophotography and two component-type developer containing the carrier  
A two-component type developer for developing an electrostatic image is constituted by a toner and a carrier. The carrier is composed of a magnetic material and a resin either coating or dispersing...
5558967 Toner for developing electrostatic image and two-component type developer for developing electrostatic image  
A toner and a two-component developer for developing electrostatic images are disclosed. The toner comprises toner particles and the two-component developer comprises the toner and a carrier. The...
5536608 Imaging processes using cyan and black toners  
An imaging process which comprises (1) charging an imaging member in an imaging apparatus; (2) creating on the member a latent image comprising areas of high, intermediate, and low potential; (3)...
5516618 Method of making carriers having coatings with fillers  
A process for the preparation of carrier powder polymer coatings which comprises the supercritical polymerization of a monomer and surfactant in a supercritical medium to form a porous polymer, and...
5514514 Method of making coated carrier particles  
A process for the preparation of carrier powder polymer coatings which comprises the supercritical polymerization of a monomer and surfactant in a supercritical medium to form a porous polymer, and...
5496675 Carrier coating and processes  
A process for the preparation of conductive, electronegative, submicron polymeric particles comprised of a first polymer optionally containing from about 1 to about 50 percent by weight of a...
5496674 Particles suitable as carriers for electrophotography  
Particles (I) which are suitable as carriers for electrophotography consist of a) a magnetic core and b) a shell of alumina, chromium oxide, molybdenum oxide, tungsten oxide, silica, tin...
5486443 Magnetic toner compositions with silica, strontium titanate and polyvinylidene fluoride  
A toner comprised of resin particles, magnetite, carbon black, rhodamine charge additive, wax, and a surface mixture of silica, strontium titanate and polyvinylidene fluoride.
5483329 Carrier for developer and method of electrophotographically forming visual image using same  
There is provided an improved carrier for a developer for use in an electrophotographic recording apparatus, which is composed of iron particles having non-spherical shapes and an average size of...
5472819 Toner and developer composition containing the same  
A developer composition of the present invention contains a toner having at least a binder resin, a coloring agent and a toner scum preventive. The binder resin contains as a main component a...
5424160 Conductive carrier coatings and processes for the perfection thereof  
A carrier composition comprised of a core with a coating thereover comprised of a composite comprised of a conductive aromatic or heteroaromatic polymer comprised of a monomer or monomers selected...
5376489 Two-component developer  
The developer in accordance with the present invention includes toner, and a carrier having a core material the surface of which is coated with a coating layer made of a polymer, the coating layer...
5360691 Carrier for developing electrostatic latent images, developer, and electrophotographic developing process  
A carrier for developing electrostatic latent images is disclosed, which comprises a core material at least a part of which is coated with a resin containing a copolymer comprised of vinylidene...
5336579 Color developer compositions containing bare carrier cores and coated carrier cores  
A developer composition containing color toner particles, bare carrier core particles and coated carrier particles.
5332638 Developer compositions with thermoset polymer coated carrier particles  
A carrier composition comprised of a core with a coating thereover comprised of a thermosetting polymer, or mixtures thereof.
5330874 Dry carrier coating and processes  
A process for the preparation of carrier particles which comprises the dry coating of a carrier or carrier cores with conductive submicron polymeric particles containing from about 1 to about 50...
5304449 Toner and developer compositions with pyridinium compounds and tetrasubstituted ammonium salts as charge enhancing additives  
Toner and developer compositions contain as charge enhancing components (1) alkyl pyridinium compounds or their hydrates and (2) tetrasubstituted ammonium salts. These toner and developer...
5288577 Dry-type developer  
A dry type developer is composed of substantially spherical, electrically insulating toner particles which are free from electroconductive particles, and carrier particles, each carrier particle...
5288580 Toner and processes thereof  
A process for the preparation of toner compositions with excellent humidity characteristics and comprised of resin particles, and pigment particles which comprises adding thereto metal oxide...
5272039 Preparation of magnetic carrier particles  
Electrostatographic carrier particles with improved conductivity and stability are prepared from magnetic stainless steel particles. The particles are treated by submersion in an aqueous oxalic...
5260159 Developer for full color copy containing light-transmittable toner and resin-coated carrier having pores  
This invention relates to a two-component developer for full color copy in the combination of small toner particles which are light-transmittable and composed of a specified resin with carrier...
5230980 Treating carrier particles with coatings containing charge enhancing additives  
A carrier composition comprised of a core with a coating thereover comprised of a mixture of first and second polymers that are not in close proximity thereto in the triboelectric series, which...
5225302 Two-component dry type developer for developing latent electrostatic images  
A two-component dry type developer for developing latent electrostatic images comprises (i) toner particles with an average particle diameter of 14 μm or less and (ii) carrier particles with an...
5215846 Toner and developer compositions with coupled liquid glass resins  
A toner composition comprised of chemically coupled multiblock or liquid glass resin particles with a glass transition temperature of between from about 20° C. to about 65° C., and pigment...
5188919 Particulate toner material containing charge controlling compound  
Particulate toner material for use in the development of latent electrostatic images, wherein said particulate toner material is capable of acquiring by triboelectric contact electrification a net...
5180650 Toner compositions with conductive colored magnetic particles  
A toner composition comprised of resin particles, pigments, and a colored highly conductive magnetic composition comprised of a core comprised of a metal, and thereover a coating comprised of a...
5158852 Electrophotographic development process  
An electrophotographic development process is disclosed, in which a visible toner image is fixed after it is transferred onto transfer members, the visible toner image being formed by a development...
5102769 Solution coated carrier particles  
A process for the preparation of carrier particles with substantially stable conductivity parameters which comprises providing a carrier core and applying thereto from a solution mixture thereof a...
5039587 Oxide-coated carriers and preparation and use thereof  
A novel carrier which is stable and effective over long cycle times (6×10 6 prints), has an iron oxide coating of the formula (FeO) x .Fe 2 O 3 where x=0.1-1 and is obtained by treating steel...
5032482 Carrier and developer and method of developing using same  
Carrier of a two-component type developer having a carrier core material and an organic polymer coating which results in a 20 to 45% carrier filling rate and dynamic permittivity which satisfies...
5015550 Electrophotographic coated carrier particles and methods thereof  
Disclosed is a carrier and developer composition, and a process for the preparation of carrier particles with substantially stable conductivity parameters which comprises (1) providing carrier...
4996127 Toner for developing an electrostatically charged image  
This invention provides a toner composed of associated particles of secondary particles comprising primary particles of a polymer having an acidic or basic polar group and particles of a coloring...
4971880 Developer containing halogenated amorphous carbon particles prepared by plasma-polymerization  
The present invention relates to a developer such as a toner and/or carrier for use in electrophotographic developing processes, and more specifically relates to a developer containing halogenated...
4968573 Method of developing electrostatic latent images  
In a method of developing an electrostatic latent image formed on an electrostatic latent image-carrying member with a developer comprising a magnetic carrier and a toner in a non-contact manner...
Matches 1 - 50 out of 158 1 2 3 4 >