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Document Title |
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7368211 |
Magnetic toner
To provide a magnetic toner which is excellent in durability and developability even in the case of being applied to high-speed developing process or being used in a large-capacity process...
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7252915 |
Magnetic mono-component toner composition
The present invention relates to a magnetic mono-component toner composition, and more particularly to a mono-component toner composition that comprises magnetic toner particle comprising a binder...
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7208252 |
Magnetic toner and conductive developer compositions
Magnetic toner compositions, conductive developer compositions, and methods for producing images in a hybrid jumping development system, more specifically, in a magnetic ink character recognition...
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7144626 |
Magnetic iron oxide particles and magnetic toner using the same
There are provided magnetic iron oxide particles having an average particle diameter (Dp 50 ) of primary particles of 0.05 to 0.3 μm, an average particle diameter (Da 50 ) of secondary particles...
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7123862 |
Image forming apparatus
In an image forming apparatus having at least an amorphous silicon photosensitive member, a magnetic toner developing means and a color developer developing means, the magnetic toner has a...
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7122286 |
Toner for development of electrostatic latent images, method of forming images, image formation apparatus, toner container containing the toner therein, and image formation apparatus equipped with the toner container
A toner for developing a latent electrostatic image to a toner image, including a binder resin, and a magnetic material which is blackened by coating the surface of a magnetic powder with a...
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7070895 |
Magnetic toner composition having superior electrification homogeneity
The present invention relates to a magnetic toner composition, and more particularly to a magnetic toner composition having an improved chargeability and excellent uniform chargeability, and that...
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7043175 |
Image forming method and apparatus
In an image forming system, an image-bearing member having a photoconductor layer comprising an Si-based non-single crystal material is charged at a relatively low potential of 250 to 600 volts by...
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6953504 |
Black pigment powder having a low value of magnetization, process for producing the same, and applications thereof
A black pigment powder having a low value of magnetization according to the present invention is characterized in that it consists of a composite oxide containing Fe 2 TiO 4 as a main component,...
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6875549 |
Dry toner, toner production process, image forming method and process cartridge
A toner showing a high transferability and suitable for use in cleanerless image forming system is formed of toner particles comprising at least a binder resin and magnetic iron oxide. The toner is...
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6858365 |
Toner for developing electrostatic latent image, developing method and developing apparatus
A toner, a developing method and apparatus is provided to satisfy both the low temperature fixation property and the hot offset property and that has a wide range of fixing temperature. The toner...
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6806010 |
Toner containing magnetite particles
The invention relates to a toner containing low-silicon magnetite particles.
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6803164 |
Magnetic black toner
A magnetic black toner comprising magnetic black toner particles containing at least a binder resin and a magnetic material. The toner has a weight-average particle diameter of from 5 μm to 12...
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6764797 |
Toner for MICR
A toner for MICR comprises at least a binder resin, magnetite particles comprising a mixture of granular magnetite and acicular magnetite, and a wax, wherein a ratio by weight of said acicular...
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6756170 |
Electrostatic image developing toner and image-forming method using the same
An electrostatic image developing toner comprising at least a binder resin and a releasant, wherein the binder resin comprises a petroleum resin and a styrene-based copolymer or styrene-based...
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6733940 |
Toner for magnetic ink character recognition system and non-magnetic monocomponent development method
The present invention provides a toner for MICR suitable for use in a printer for a non-magnetic monocomponent developing system, which does not produce scratches on a developing sleeve when used...
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6677093 |
Electrophotographic black toner, electrophotographic developer and image forming method
An electrophotographic black toner comprising a colorant and a binder resin, wherein the toner has a metal oxide as the colorant of 20% by weight or less, said metal oxide having magnetization of...
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6670086 |
Coupled alcohol ethoxylates for improved thermal properties
Coupled alcohol ethoxylates made by reacting alcohol ethoxylates with a diisocyanate have been found to improve the thermal properties of toner compositions and powder coatings. The alcohol...
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6656658 |
Magnetite toner processes
A toner process comprising heating an acidified dispersion of an acicular magnetite, a carbon black colorant dispersion, an optional wax dispersion, and an acicular latex.
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6653037 |
Toner for developing latent electrostatic images, and image forming method and device
A toner for developing latent electrostatic images is provided which contains, in a binder resin, at least a coloring agent formed from a metal material. A saturation magnetization of the toner is...
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6653036 |
Magnetic toner and image forming method
A magnetic toner includes a magnetic toner particle containing a binding resin and a magnetic material. The magnetic material includes a magnetic iron oxide containing 0.10% to 4.00% by weight of...
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6638675 |
Black magnetic toner
Black magnetic toner comprising: a binder resin, and black magnetic composite particles comprising: magnetic iron oxide particles having an average particle diameter of 0.055 to 0.95 μm; a...
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6589701 |
Dry toner, image forming method and process cartridge
A dry magnetic toner is formed of magnetic toner particles comprising a binder resin and magnetic iron oxide particles. The magnetic toner is provided with excellent developing performances and...
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6562533 |
Magnetites and their use in producing toners
This invention relates to magnetite particles with a mean particle size of 0.1 to 0.3 μm, a specific surface area of 6 to 9 m 2 /g, a coercive force of 80 to 110 Oe, a residual magnetization of 13...
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6562532 |
Black magnetic toner and black magnetic composite particles therefor
Black magnetic toner comprising: a binder resin; and black magnetic composite particles having an average particle diameter of 0.06 to 1.0 μm comprising: magnetic iron oxide particles, a coating...
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6475687 |
Magnetic composite particles for black magnetic toner and black magnetic toner using the same
Magnetic composite particles having an average particle diameter of 0.06 to 1.0 μm and a coercive force value of less than 39.790 kA/m, comprising: magnetic core particles, a coating formed on...
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6451495 |
Toner and developer compositions with charge enhancing additives
A toner comprised of resin, colorant, and a potassium stearate charge enhancing additive.
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6447968 |
Magnetic toner, process for producing magnetic toner, and image forming method
A magnetic toner for developing an electrostatic latent image has magnetic toner particles containing at least a binder resin, a magnetic powder and a wax component. The magnetic powder has...
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6426169 |
Toner containing azo iron compound
A toner having a stable chargeability in various environments, a stable fixability over a wide temperature range and a resistance to sticking on an image-bearing member, is formed of a binder...
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6355194 |
Carrier pelletizing processes
A process for the preparation of microsynthetic carrier comprising the melting of a mixture of binder resin, magnetic component, colorant and optionally charge control additive, thereby forming a...
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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...
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6183925 |
Two component developer comprising specific magnetic toner and specific magnetic carrier
This invention provides a two-component developer comprising magnetic carrier particles and toner particles which contain magnetic particles at a specified content, being excellent in high speed...
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6140001 |
Iron oxide microparticles and a process for producing them
The invention resides in iron oxide particles having very small particle size, high saturation magnetization and low remanent magnetization. The invention also resides in a process for producing...
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6048920 |
Magnetic nanocomposite compositions and processes for the preparation and use thereof
A magnetic nanocomposite composition comprising from about 0.001 to about 60 weight percent of nanocrystalline particles of Fe 3 O 4 , and from about 40 to about 99.999 weight percent of a resin.
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6017668 |
Toner compositions
A toner comprised of resin, colorant, and a surface additive mixture of a magnetite and a polyvinylidene fluoride.
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6007957 |
Magnetic toner, image forming method and process cartridge
A magnetic toner includes magnetic toner particles containing at least a binder resin and a magnetic iron oxide. The magnetic iron oxide contains 0.2 to 4.0% by weight of at least one metal element...
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6004711 |
Toner composition including positive and negative tribocharging hydrophobic extra-particulate additives
Toner compositions comprise (a) a toner particulate including resin, magnetic component and charge control agent, and (b) an extra-particulate additive comprising a first hydrophobic additive...
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5976752 |
Toner and image forming method
An electrophotographic toner is composed of at least a binder resin, a colorant, and a wax. The binder resin (a) comprises a polyester resin, a vinyl resin and a hybrid resin component comprising a...
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5914210 |
Developer and developing method
In the present invention, in carrying out reversal development of an electrostatic latent image formed on a positively charged amorphous silicon type photoreceptor, a developer including positively...
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5914209 |
Single development toner for improved MICR
The use of a mixture of hard and soft magnetites as well as a lubricating wax in the formulation of single component developers is disclosed. The mixture allows for sufficient high remenance for...
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5908726 |
Electrophotographic toner and method for forming images
An electrophotographic toner includes a binder resin including a linear polyester such as a polyester formed by condensation of an ethylene oxide adduct of a bisphenole A with a terephthalic acid,...
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5885740 |
Magnetite particles, a process for producing them and applications thereof
Magnetite particles that contain 0.1-5.0 wt % of P, 0.1-5.0 wt % of Al and optionally up to 5.0 wt % of Si on the basis of Fe, that have σ r /SSA ratio of no more than 0.9 (σ r , residual...
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5882832 |
One component developer developing method and dry toner therefor
A dry toner useful for one component developer developing method is provided which has good image qualities and durability without contamination of developing apparatus. The toner includes a metal...
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5858593 |
Magnetic toner, apparatus unit and image forming method
Disclosed are a magnetic toner for developing an electrostatic latent image comprising magnetic toner particles containing a binder resin of 100 parts by weight and a magnetic substance of 20 to...
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5843610 |
Magnetic particles for magentic toner and process for producing the same
A magnetic toner containing 100 parts by weight of magnetic Fe 2 + -containing iron oxide particles having an average particle size of 0.05 to 0.30 μm, containing not less than 0.9 atm % and less...
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5750302 |
Magnetic toner for developing electrostatic image, image forming process, and process cartridge
A magnetic toner for developing an electrostatic image has magnetic toner particles containing at least a binder resin and magnetic iron oxide particles. The magnetic iron oxide particles have been...
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5736288 |
Toner for developing electrostatic images, process cartridge, and image forming method
A toner is comprised of a composition containing at least a polymer component and a charge control agent. The polymer component contains substantially no tetrahydrofuran (THF)-insoluble matter. The...
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5712070 |
Toner for developing electrostatic image, image forming method, developing device and process cartridge
A toner for developing electrostatic images is constituted by toner particles comprising a binder resin and a colorant. The toner is characterized by having (i) a particle size distribution...
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5705305 |
Developer for developing electrostatic latent image
A developer for developing an electrostatic latent image formed on an photosensitive body, including a toner, a fluidity improving material, a cleaning material, and hydrophobic fine particles...
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5695901 |
Nano-size magnetic particles for reprographic processes and method of manufacturing the same
Provided is a method for producing nano-size magnetic particles, and particularly magnetite and maghemite particles, that are useful in preparing toner products for reprographic processes. The...
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