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8137886 |
Magnetic carrier, two-component developer and image forming method
A magnetic carrier is provided which uses a toner having high coloring power and enables development to be performed at low electric field intensity and can form high quality images while keeping...
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8137879 |
Ferromagnetic nanoparticles with high magnetocrystalline anisotropy for MICR toner applications
A toner including stabilized magnetic single-crystal nanoparticles, wherein the value of the magnetic anisotropy of the magnetic nanoparticles is greater than or equal to 2×104 J/m3. The magnetic ...
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8114562 |
Two-component developer, replenishing developer, and image-forming method
A two-component developer containing a yellow toner and a magnetic carrier, wherein the yellow toner has the characteristics: (i) when the concentration of the yellow toner in a solution of the...
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8110331 |
Electrophotographic developer and image forming method
An electrophotographic developer including: magnetic particles, and a toner containing toner particles charged with the magnetic particles and having a particle diameter distribution, wherein the...
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8062822 |
Carrier for electrostatic latent image development and electrostatic latent image developer
An electrostatic latent image developing carrier is provided which comprises a core particle and a resin coating layer containing conductive particles dispersed therein, the carrier having a volume...
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7981582 |
Toner and developer compositions with a specific resistivity
A toner having a crystalline or semi-crystalline polyester resin, an amorphous resin and a colorant. The toner preferably exhibits a resistivity of at least 1×1011 ohm-cm. A developer may be ...
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7964330 |
Electrophotographic resin-coated ferrite carrier, method for producing the same, and electrophotographic developer
There are adopted an electrophotographic resin-coated ferrite carrier having a carrier core coated with a resin, wherein a product of an apparent density ρ (g/cm3), average particle size d (μm) a...
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7939231 |
Magnetic toner
A magnetic toner is disclosed having magnetic toner particles containing a binder resin and a magnetic iron oxide. The magnetic toner has a specific saturation magnetization and a specific residual...
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7935468 |
Toner and method of manufacturing the same
There is provided a toner which is excellent in temporal stability and environmental stability of charges and which is capable of forming images that contains almost no background fog and has high...
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7910278 |
Toner for developing electrostatic image
The present invention provides a toner for developing electrostatic image comprising a colored particle containing a binder resin, a colorant and a release agent, wherein the toner for developing...
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7906262 |
Two-component developer, replenishing developer, and image-forming method
A two-component developer containing a cyan toner and a magnetic carrier, wherein the cyan toner has the characteristics: (i) when the concentration of the cyan toner in a solution of the cyan...
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7906265 |
Ferrite carrier for electrophotographic developer, method for producing the same, and electrophotographic developer
A ferrite carrier for an electrophotographic developer having a compression breaking strength of 150 MPa or more, a rate of compressive change of 15.0% or more and a shape factor SF-1 of 100 to...
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7879521 |
Electrophotographic carrier, method of manufacturing the same, and image forming method employing the same
An objective is to provide a highly durable carrier for a developer which is capable of forming a high-definition image stably with no deterioration of a developing property since the carrier...
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7879520 |
Toner for developing electrostatic image and image formation process using it
A toner for developing an electrostatic image comprises a binding resin for a toner and a charge control agent including an azo-type iron complex salt represented by the following chemical formula...
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7851116 |
Emulsion aggregation high-gloss toner with calcium addition
Toner including toner particles having a calcium-containing material at least in a surface portion of the toner particle, wherein the toner particles contain calcium in an amount of from 20 ppm to...
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7824833 |
Resin-coated ferrite carrier for electrophotographic developer, its production method, and electrophotographic developer using the resin-coated ferrite carrier
A spherical resin-coated ferrite carrier for an electrophotographic developer which can maintain a stable resistance and chargeability, a favorable charge rising property because of an excellent...
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7794908 |
Toner
Provided is magnetic toner including capsule type toner particles each having a surface layer (B) on a surface of a toner base particle (A) containing at least a binder resin (a) mainly formed of a...
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7767370 |
Two-component developer, replenishing developer, and image-forming method
A two-component developer containing a magenta toner and a magnetic carrier, wherein the magenta toner has the characteristics: (i) when the concentration of the magenta toner in a solution of the...
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7759040 |
Image forming method
A cleaner-less image forming method includes forming an electrostatic latent image on a electrostatic latent image carrying member; developing the electrostatic latent image with a developer...
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7682764 |
Resin coated carrier for electrophotography and two-component developer for electrophotography made therefrom
A resin coated carrier for electrophotography and a two-component developer for electrophotography made therefrom, in which electrostatic charge giving ability to toner is high, anti-spent property...
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7678524 |
Magnetic toner
A magnetic toner including at least: a binder resin; and a magnetic body, in which, when magnetization at a magnetic field strength of 397.9 kA/m and a coercive force of the magnetic toner are...
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7678523 |
Magnetic toner
To provide a magnetic toner which has superior low-temperature fixing performance and pressure roller anti-staining properties even in various forms of use, has been kept from image defects such as...
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7604915 |
Toner compositions having magenta pigment
Use of a charge control agent in a toner, such as a magenta toner, to give an increased triboelectric charge is disclosed. The magenta toner may contain a magenta resin, such as xanthene. The...
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7601475 |
Carrier and developing agent for electrophotography
A two-component developing agent containing a carrier which can maintain a charge-imparting property to a toner at a high level for a long period of time, does not generate flying of the carrier...
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7592116 |
Indium-containing carrier for electrophotography, developer using the same, and developer container
The object of the present invention is to provide a carrier for electrophotography which includes a core material and a coating layer comprising particles on a surface of the core material, in...
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7592115 |
Carrier for electrostatic latent image developer, production method thereof, electrostatic latent image developer, and image-forming device
A carrier for electrostatic latent image developer, including a core material and at least two or more resin-coated layers formed on the surface of the core material, wherein the resin-coated...
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7572565 |
Carrier particle compositions for xerographic developers
Carrier includes a mixture of carrier particles. The mixture may contain first carrier particles containing carrier cores that are coated with a polymer coating, the coating containing polymer and...
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7537874 |
Toner with high strength magnetite
A toner having a high strength magnetite in an amount of from about 10 to about 40 weight percent, wherein the magnetite includes a material selected from the group consisting of FeO, Fe2O3, Fe3O4,...
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7468233 |
Developer for use in electrophotography, image forming method and process cartridge
Electro-photographic images having high picture quality and low carrier adhesion can be obtained using a two-component developer containing a carrier containing (A) a carrier containing a core...
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7439003 |
Magnetic black toner for electrophotography having Mn-containing hematite compound and magnetic two-component developer for electrophotography containing the same
A magnetic black toner for electrophotography comprising a binding resin, a magnetic substance, and a pigment, wherein the pigment is at least one of phthalocyanine pigment and Mn containing...
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7422832 |
Magnetic toner
Provided is a magnetic toner comprising magnetic toner particles each comprising at least a binder resin and a magnetic iron oxide, the magnetic toner being excellent in developability and...
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7422833 |
Toner, production process thereof, and process for forming image
A charge control resin composition for positive or negative charge, which is prepared either by mixing and kneading a charge control resin for positive or negative charge with a colorant, or by...
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7399567 |
Toner for electrostatic latent image development, electrostatic latent image developer containing the toner, and image formation method using the developer
A toner for electrostatic latent image development containing at least a binder resin and a colorant, wherein [Fe]/[C] satisfies the following formula (1) where [C] indicates the carbon content (%)...
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7390603 |
Image forming apparatus and toner
The present invention provides An image forming apparatus having: a negatively chargeable spherical toner; an latent image carrier; a charging member for charging a surface of the latent image...
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7390604 |
Negatively chargeable spherical toner, color image forming apparatus, and process for producing negatively chargeable spherical toner
The present invention provides a negatively chargeable spherical toner having: a toner mother particle having a binder resin and a colorant, which has: a number average particle size of from 4.5 to...
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7384719 |
Carrier, developer including the carrier, and image forming apparatus using the developer
A carrier composition, including a particulate magnetic material; and a layer located on a surface of the particulate magnetic material, wherein the layer is formed by heating a mixture containing...
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7378211 |
Carrier and developer compositions
A carrier composition having magnetite with a diameter of from about 80 microns to about 150 microns, and wherein the carrier has a conductivity of from about 10−8 to about 10−11 (ohms-cm)−1 and a...
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7358019 |
Developing process and image forming process
The present invention provides a developing process including the steps of charging toner particles supported on a developer carrier; and providing the charged toner particles to an electrostatic...
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7344814 |
Toner and image-forming method therewith
A toner for an image-forming apparatus and method which apparatus has a cleaning means with a cleaning blade to remove a residual toner remaining on a surface of a photoconductive member after...
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7323279 |
One-component magnetic toner for developing an electrostatic charge image, process cartridge, and method for recycling the process cartridge
The present invention provides a one-component magnetic toner for developing an electrostatic charge image, which do not cause an image defect by toner aggregation or fusion even though a device is...
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7314696 |
Electrophotographic toner and development process with improved charge to mass stability
Toners and developers are disclosed. The toner of the present invention contains at least one toner resin, at least one charge control agent, at least one surface treatment agent, and optionally at...
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7309556 |
Black toner and developer
A developer includes black toner particles and carrier particles, the black toner particles including at least one binder, at least one black colorant and one or more external additives, wherein...
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7300734 |
Toner compositions
A toner composition comprising a binder, colorant, and a charge control surface additive mixture comprising a mixture of a first titanium dioxide possessing a first conductivity and a second...
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7295788 |
Image forming apparatus and process cartridge
An image forming apparatus includes an object to be charged whose surface moves. A charging device for charging the object uses an electrical discharge generated by applying a voltage including an...
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7291436 |
Electrophotographic toner, method for producing the same, electrophotographic developer, and image forming method
An electrophotographic toner having a core-shell structure including a crystalline resin in its core region or a sea-island structure including a crystalline resin in its island region, wherein the...
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7244539 |
Magnetic carrier and two-component developer
A magnetic carrier includes a magnetic material-dispersed resin core containing at least a magnetic material and a binder resin. The surface of the magnetic material-dispersed resin core is coated...
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7192679 |
Carrier for electrophotographic developer
The present invention relates to a carrier for electrophotographic developers, a developer containing the carrier, a container for the developer, a image forming apparatus using the developer, an...
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7183033 |
Carrier core material, coated carrier, two-component developing agent for electrophotography, and image forming method
A carrier core material for an electrophotographic developing agent, which comprises 100 parts by weight of a ferrite component represented by a formula (A) and 0.1 to 5.0 parts by weight of ZrO2...
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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 M2/(M1+M2), resp...
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7160662 |
Electrostatic latent image developing agent and image forming method
The present invention relates to an image forming method including: a charging step; an electrostatic latent image forming step; a developing step; a transfer step; a fixing step; and a cleaning...
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