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| Number | Title | Issue Date |
| 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 toner exhibits cumulative toner weight distributions of both square of... | 02/07/2012 |
| 8080354 | Toner Disclosed is toner in which is used in an image formation process comprising the steps of transferring an image of toner formed on a photoreceptor onto a recording sheet, and removing any residual toner remaining on any of the photoreceptor, an intermediate transfer... | 12/20/2011 |
| 7820351 | Non-magnetic toner, two-component developer, and image forming apparatus An image forming apparatus for forming images with a toner and includes an image forming section, a paper feeding section and an image reading section, in which the non-magnetic toner is as follows: the particle size D10V and the particle size D90V | 10/26/2010 |
| 7625685 | Magnetic mono-component toner for developing electrostatic latent image and image forming method The present invention provides a magnetic mono-component toner which can suppress a selection development on a latent image carrier and can maintain favorable image properties for a long period by using a toner having the coarse powder distribution (S) within a give... | 12/01/2009 |
| 7560214 | Toner, process for producing toner, two-component developer and image forming apparatus Toner of the present invention is produced by mixing in an aqueous medium at least a resin particle dispersion in which resin particles are dispersed, a colorant particle dispersion in which colorant particles are dispersed, and a wax particle dispersion in which wa... | 07/14/2009 |
| 7531281 | Toner for developing latent electrostatic image, container having the same, developer using the same, process for developing using the same, image-forming process using the same, image-forming apparatus using the same, and image-forming process cartridge using the same A toner for developing a latent electrostatic image including a base of toner particle which contains a binder resin and a coloring agent, and an external additive. Herein, a plurality of the base of toner particle has a volume average particle diameter (Dv) of 3 μ... | 05/12/2009 |
| 7452648 | Magnetic mono-component toner for developing electrostatic latent image and image forming method The present invention provides a magnetic mono-component toner which can suppress a selection development on a latent image carrier and can maintain favorable image properties for a long period by using a toner having the coarse powder distribution (S) within a give... | 11/18/2008 |
| 7449274 | Toner for electrostatic image development and image forming method using the same A toner for electrostatic image development, which contains toner particles in which not more than 13 percent by number of the toner particles have a particle diameter of smaller than 4 μm, not less than 20 percent by number of the toner particles have a particle d... | 11/11/2008 |
| 7442482 | Process for preparing toner A process for preparing a toner including the steps of (I) melt-kneading a raw material mixture containing a resin binder, a wax, and a colorant with an open-roller type kneader; (II) cooling the melt-kneaded mixture obtained in the step (I) and pulverizing the cool... | 10/28/2008 |
| 7429442 | Toner, and two component developer and image forming apparatus using the toner A toner is provided that contains a binder resin; a colorant; a release agent; and an external additive, wherein the toner has an average circularity of from 0.940 to 0.965 and a crater having a depth of from 0.02 to 0.1 μm, and wherein the crater has an amount of ... | 09/30/2008 |
| 7419756 | Dry toner, method for manufacturing the same, image forming apparatus, and image forming method A dry toner contains fine particles having average sphericity of 0.93 to 0.99, a content of the fine particles having a particle diameter of 2 μm or less in the dry toner is 20% by number or less. A method for manufacturing a dry toner includes a process for disper... | 09/02/2008 |
| 7402370 | Single component developer of emulsion aggregation toner A toner for developing electrostatic images in a single component development (SCD) system free of carrier and including emulsion aggregation toner particles of a styrene acrylate polymer binder, at least one release agent and at least one colorant, wherein the tone... | 07/22/2008 |
| 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 (%) and [Fe] indicates the iron content (%) of the toner determined thro... | 07/15/2008 |
| 7384720 | Toner for developing latent electrostatic image, container having the same, developer using the same, process for developing using the same, image-forming process using the same, image-forming apparatus using the same, and image-forming process cartridge using the same A toner for developing a latent electrostatic image including a base of toner particle which contains a binder resin and a coloring agent, and an external additive. Herein, a plurality of the base of toner particle has a volume average particle diameter (Dv) of 3 μ... | 06/10/2008 |
| 7378213 | Image forming process and image forming apparatus A process contains in which heating and fixing an image of a toner on a recording medium is performed by heating one or more heat-transfer media by a heating element, and pressing the recording medium bearing the toner image to one of the heat-transfer media. At lea... | 05/27/2008 |
| 7374854 | Image-forming method and image-forming apparatus using the same The present invention provides an image-forming method, including pseudo-halftone-processing an input signal corresponding to image information to generate an output signal; irradiating a radiation beam corresponding to the output signal onto a latent image-holding ... | 05/20/2008 |
| 7374848 | Toner and method or preparing the toner A toner including a binder; a colorant; and a wax, wherein the binder includes a polyester resin; and a reaction product of a polymer having a group capable of reacting with an active hydrogen with a compound having an active hydrogen, wherein the polyester resin in... | 05/20/2008 |
| 7368212 | Toner for developing electrostatic image, developer, image forming apparatus, process for forming image, process cartridge and process for measuring porosity of toner A toner for developing an electrostatic image, includes: a colorant; and a binder resin. The toner has a particle including at least one pore having a diameter of 10 nm or over, and a porosity thereof is in a range from 0.01 to 0.60. ... | 05/06/2008 |
| 7366431 | Developing device, process cartridge and image forming apparatus In accordance with the present invention, a transparent or semitransparent window is formed in a developing device or a process cartridge to allow one to see the inside of the developing device via the window from the outside. The window may preferably be formed in ... | 04/29/2008 |
| 7361443 | Image forming method An image forming method is disclosed. The method includes steps of forming a toner image on an image forming member, transferring the toner image to an image supporting material, by applying an electric field between the image forming member and the image supporting... | 04/22/2008 |
| 7354688 | Toner compositions with surface additives A toner composition includes a binder, a colorant, and a surface additive package including a polydimethylsiloxane surface treated silica, a surface treated titania, and calcium sterate. The toner composition provides improved triboelectric charging properties. ... | 04/08/2008 |
| 7344815 | Toner for forming electrostatic image A toner for developing an electrostatic image is disclosed. The arithmetic average of shape coefficient SF-1 of the toner particles calculated by Equation 1 is from 125 to 170 and a ratio of that to an arithmetic average of the shape coefficient SF-2 of the toner pa... | 03/18/2008 |
| 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 transfer; the toner being a mixture of a colored polymer particle and an ... | 03/18/2008 |
| 7340202 | Image forming apparatus and process cartridge for use therewith An image forming apparatus and process cartridge that achieves extended operating life of a two-component developer without generating such problems as toner scattering, etc. either in the initial period or over time. The gap between the image support member and the... | 03/04/2008 |
| 7332144 | Hydrophobic silica fine powder and making method A hydrophobic silica fine powder is prepared by premixing a hydrophilic silica fine powder with a dimer diol siloxane or cyclic siloxane as a hydrophobizing agent, mixing them in a ball mill for achieving dispersion and for achieving cleavage or disintegration and c... | 02/19/2008 |
| 7333744 | Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage A charge apparatus charges by uniformly superimposing an alternate current bias voltage with a fixed frequency over a direct current bias voltage as the charge bias voltage on a photosensitive member. An exposure apparatus exposes the surface of the charged photosen... | 02/19/2008 |
| 7323281 | Toner, developer including the toner, container containing the toner or the developer and method of producing the toner A toner comprising toner particles comprising a first binder resin; a second binder resin different from said first binder resin and having a glass transition temperature of from 40 to 55° C.; a colorant; and a release agent, and a particulate resin material which ... | 01/29/2008 |
| 7320852 | Carrier for developer for developing electrostatic latent image, developer using same and image forming method using same A carrier for use with a toner as a two-component type developer for developing an electrostatic image, comprising spherical magnetic core particles, and a resin layer covering each of said core particles and containing at least two resistance controlling materials ... | 01/22/2008 |
| 7320850 | Magenta toner A magenta toner is provided which contains at least a binder resin, a colorant, and a wax, in which a maximum heat-absorption peak temperature as measured using a differential scanning calorimeter, a reflectance at a predetermined wavelength when measured in a powde... | 01/22/2008 |
| 7318990 | Toner, developer, image forming method, image forming apparatus and toner manufacturing method A toner includes toner particles which have a binder resin and a colorant. The toner has a weight average particle diameter of from 4 to 7 μm and includes toner particles having a circle equivalent diameter of from 0.6 to 2.0 μm in an amount not greater than 5% by... | 01/15/2008 |
| 7312009 | Color toner having low contamination of charging elements The present invention relates to a non-magnetic mono-component toner comprising a toner mother particle, and a coating layer formed on the mother particle where the coating layer comprises fatty acid metal salt having average particle size of 0.05 to 3.0 μm, a firs... | 12/25/2007 |
| 7303847 | Dry toner A dry toner is provided that is prepared by a method including the steps of (A) dissolving or dispersing a toner composition in an organic solvent to prepare a toner composition liquid and (B) dispersing the toner composition liquid in an aqueous liquid which contai... | 12/04/2007 |
| 7298995 | Developing device used in an image forming apparatus The developing device 100 includes a stirrer and transferor 122, 124, a magnetic roller 130, and a developing roller 140, that are disposed in a housing 110 which contains the two-component developing agent including the magnetic c... | 11/20/2007 |
| 7294443 | Toner composition and method for manufacturing the toner composition A toner composition including toner particles including a binder resin; and a colorant, and a charge controlling agent which is at least located on a surface of the toner particles, wherein the toner composition has a spherical degree of from 0.96 to 0.99, and where... | 11/13/2007 |
| 7291435 | Toner binder for electrophotography and toner for electrophotography The present invention provides a toner binder for electrophotography which comprises a polyester resin constituted of an alcohol component containing a polyoxyalkylene ether (A) of a bisphenol and an acid component, and the content of unreacted bisphenols in said po... | 11/06/2007 |
| 7288348 | Color toner In a color toner having toner particles which have toner base particles containing a binder resin, a colorant and a wax, and inorganic fine particles, (i) in the toner base particles, particles having a circle-equivalent diameter of 3.00 μm or more as measured with... | 10/30/2007 |
| 7288354 | Toner A toner is composed of toner particles including toner base particles containing at least a binder resin and a colorant, and inorganic fine particles. The toner base particles having a specific circle-equivalent diameter as measured with a flow type particle image a... | 10/30/2007 |
| 7288353 | Toner, developer, image developer and image forming apparatus A toner including toner particles including a binder resin, a colorant, and an inorganic particulate material present on a surface of the toner particles. The toner particles have a surface roughness (Ra) of from 1 to 30 nm, a standard deviation of the surface rough... | 10/30/2007 |
| 7279261 | Emulsion aggregation toner compositions A toner includes particles of a resin, a leveling agent, an optional colorant, and additional optional additives, where the leveling agent is selected from silicon containing leveling agents, and mixtures thereof, and where the toner particles are prepared by an emu... | 10/09/2007 |
| 7273688 | Image forming method and image forming apparatus for same An electrophotographic image forming apparatus capable of reliably forming an image with density gradation, one which does not have a low-quality appearance. The estimated average halftone granularity of the toner image after developing but before electrostatic tran... | 09/25/2007 |
