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| Number | Title | Issue Date |
| 8178272 | External additive, method of manufacturing same and toner An external additive including titanium dioxide having a water-soluble component of at least 0.2% by weight and a fluorosilane compound, wherein the titanium dioxide is surface-reformed by the fluorosilane compound. ... | 05/15/2012 |
| 8163453 | Toner having particles and titanate compound Disclosed is a toner which can be charged at a designated level even when a lot of print is carried out with severity of charging by stirring and when the printing is carried out under the low temperature-low humidity or the high temperature-high humidity condition.... | 04/24/2012 |
| 8163452 | Developing agent, image forming method and image forming apparatus A developing agent includes a carrier; a toner in which an inorganic oxide external additive has a coverage of from 60 to 120% relative to a core toner; and a charging auxiliary particle having charge properties of a positive electrode and having a volume average pa... | 04/24/2012 |
| 8153343 | Toner, two-component developer, developing device, and image forming apparatus A toner in which even a toner containing crystalline polyester exhibits excellent fixing property, chargeability, color reproducibility, and long-term stability, as well as a two-component developer, a developing device, and an image forming apparatus are provided. ... | 04/10/2012 |
| 8137882 | Toner for developing electrostatic images and process for producing the toner A toner for developing electrostatic images which is obtained by melt mixing at least a binder resin and a coloring agent, forming a powder material by pulverizing the obtained mixture after cooling and removing rough particles and fine particles from the formed pow... | 03/20/2012 |
| 8110330 | Toner, developer, toner container, process cartridge, image forming method, and image forming apparatus To provide a toner that contains at least a binder resin, a colorant, a releasing agent and zeolite, the toner being manufactured through O/W type wet granulation and having an average circularity of 0.970 or greater, and a developer and image forming method using t... | 02/07/2012 |
| 8080352 | Grafting metal oxides onto polymer for toner Toner particles, including at least one binder, at least one colorant, and at least one metal oxide surface additive, wherein the at least one metal oxide surface additive is a metal oxide particle covalently bonded with at least one polycondensation polymer. ... | 12/20/2011 |
| 8062820 | Toner composition and method of preparing same The invention provides a toner composition comprising toner particles and composite metal oxide particles comprising a core consisting of a first metal oxide and a coating consisting of a second metal oxide. The core is substantially spherical and non-aggregated. Th... | 11/22/2011 |
| 8048602 | Color toner, developer, developing device, and image forming apparatus A color toner, a developer, a developing device for performing development by using the developer and an image forming apparatus having the developing device are provided. A developer, which contains a color toner formed by adding zinc oxide particles externally to ... | 11/01/2011 |
| 8029960 | Toner for developing electrostatic latent image, and image forming apparatus and process cartridge using the toner A toner, including a parent particulate material including a colorant and a binder resin, and an external additive including particles having an average primary particle diameter from 80 to less than 150 nm in an amount of from 0.03 to 2% by number, particles having... | 10/04/2011 |
| 7998649 | Grafting functionalized pearlescent or metallic pigment onto polyester polymers for special effect images Pigment particles with at least one metal oxide surface additive, wherein the at least one metal oxide surface additive is a metal oxide particle covalently bonded with at least one polycondensation polymer, wherein the pigment particle is a pearlescent or metallic ... | 08/16/2011 |
| 7862977 | Image forming method using trickle developing system, developer used for the same, manufacturing method thereof, and image forming apparatus A method to form an image using a trickle developing system, wherein (a) the toner comprises colorant particles with a volume median diameter of 3 to 8 μm having first inorganic particles on surfaces of the colorant particles to form toner particles; (b) the carrie... | 01/04/2011 |
| 7855042 | Developer and image forming method To provide a developer and an image forming method with each of which a high-resolution, high-definition image can be stably obtained over a long time period irrespective of an environment. The present invention provides a developer including at least: toner particl... | 12/21/2010 |
| 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 about 300 ppm of calcium by dry weight of the toner. Developer includ... | 12/14/2010 |
| 7838193 | Toner and image forming method using the toner A toner including toner particles including a binder resin, a colorant and a release agent, and an external additive including a first particulate inorganic material having a formula of MgxSiyOx+2y where each of x and y is an integer... | 11/23/2010 |
| 7811734 | Hydrophobic inorganic fine particles and toner Hydrophobic inorganic fine particles are provided which: does not cause melt adhesion of toner to a photosensitive member and contamination of a contact charging member; imparts excellent flowability, charging performance and durability to toner even after the toner... | 10/12/2010 |
| 7749671 | Toner for developing a latent electrostatic image, image-forming method, image-forming apparatus and process cartridge using the same To provide a toner containing at least a toner base containing a binder resin and a colorant, and an inorganic fine particle, wherein the inorganic fine particle contains a compound oxide expressed by the following Composition Formula (1): [M1]a... | 07/06/2010 |
| 7723001 | Electrophotographic toner An electrophotographic toner includes toner parent particles containing a binder resin, a colorant and a charge control agent; and an external additive added to the surface of the toner parent particles. The toner further includes positively chargeable silica and po... | 05/25/2010 |
| 7695882 | Toner formulation for controlling mass flow The present invention relates to controlling the mass flow of toner in an image forming device or a toner cartridge. The toner composition includes extra particulate additives including a conductive additive. The extra particulate additives may also include relative... | 04/13/2010 |
| 7608377 | Image forming method and image forming apparatus To provide an image forming method including forming a latent electrostatic image on a latent electrostatic image bearing member, developing the latent electrostatic image using a toner to form a visible image, transferring the visible image to a recording medium, a... | 10/27/2009 |
| 7601472 | Toner/developer compositions Toner compositions have a post-blended particulate additive which comprises aluminum oxide and aluminum hydroxide with, optionally, a third component such as silica or a wax, which is a tribo-charging additive which, upon tribo-charging of the toner particles, shift... | 10/13/2009 |
| 7601473 | Toner The invention relates to a developer for developing electrostatic images. The developer includes magnetic carrier particles at a loading of from 60 to 99 weight percent of the developer. Toner particles are at a loading of 1 to 40 weight percent of the developer. Th... | 10/13/2009 |
| 7547498 | Toner for developing electrostatic latent images and a production method for the same A toner for developing electrostatic images which contains an external additive A containing an irregular-shaped metal oxide and having an average value of the feret's horizontal diameter of from 20 nm to 1370 nm, and an external additive B containing a hydrophobic ... | 06/16/2009 |
| 7537877 | Toner used in electrophotography having toner particles and silica powder A toner is provided which can stably provide a favorable density stability, line reproducibility and dot reproducibility even in high-speed copying machines, printers and the like which form high resolution latent images over a long period regardless of environmenta... | 05/26/2009 |
| 7537876 | Electrostatic charge image developing toner Disclosed is an electrostatic charge image developing toner containing external additives possessing at least amorphous silica and a crystallized metal oxide selected from titanium oxide, aluminum oxide, zirconium oxide, or calcium oxide, wherein the amorphous silic... | 05/26/2009 |
| 7531279 | Toner manufacturing method, toner and developer A toner manufacturing method is provided including emulsion-polymerizing monomers including an aromatic vinyl monomer, to prepare a particulate resin dispersion; mixing the particulate resin dispersion and a colorant dispersion including a black metallic material, t... | 05/12/2009 |
| 7488561 | Electrostatic charge image developing toner Disclosed is an electrostatic charge image developing toner containing external additives comprising at least amorphous silica and a crystallized metal oxide selected from titanium oxide, aluminum oxide, zirconium oxide, or calcium oxide, wherein the amorphous silic... | 02/10/2009 |
| 7459252 | Electrophotographic toner An electrophotographic toner for visualizing an electrostatic latent image formed by an electrophotographic process, an electrostatic printing process, an electrostatic recording process, etc., which is produced in consideration of the environment and safety. The el... | 12/02/2008 |
| 7455943 | High gloss emulsion aggregation toner incorporating aluminized silica as a coagulating agent The toner includes emulsion aggregation toner particles of a binder including a non-crosslinked styrene acrylate polymer, at least one colorant, at least one wax, and aluminized silica, wherein an amount of aluminum metal in the toner particles is from about 50 ppm ... | 11/25/2008 |
| 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 hematite, and the content ratio of the magnetic substance and the pigment i... | 10/21/2008 |
| 7435520 | Electrophotographic developing agent Provided is an electrophotographic developing agent including: toner particles including a binder resin, a colorant, and a charge control agent; and an external additive added to the surface of the toner particles, wherein the external additive includes at least one... | 10/14/2008 |
| 7413838 | External additives for electrophotographic toner, electrophotographic toner, electrophotographic developer, image forming method and image forming apparatus An external additives for electrophtographic toner comprising finely divided oxide particulate including a silicon compound and a compound for doping said oxide particulate, wherein particle diameter of the primary particle of said finely divided oxide particulate i... | 08/19/2008 |
| 7410536 | Oxidation-stable iron oxide pigments, process for preparing them and their use The present invention relates to oxidation-stable iron oxide pigments which have a coating of at least one organic substance, to their preparation and to their use. ... | 08/12/2008 |
| 7402367 | Electrostatic image developing toner and image forming method A toner comprising a compound represented by the following formula: R1O(R2O)nH where R1 is an aliphatic hydrocarbon group having 10 to 22 carbon atoms or a distyrene-substituted phenyl group; R2 | 07/22/2008 |
| 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 |
| 7396626 | Toner The present invention provides a toner improved in dispersibility of a colorant in the toner particles and excellent in the color reproducibility including color mixability and transparency. The toner is also excellent in the stability in long-term of the chargeabil... | 07/08/2008 |
| 7393621 | Toner composition for electrophotography image forming apparatus A toner composition for an electrophotography image forming apparatus includes toner particles and external additives. The toner particles include a colorant, a charge control agent and a release agent with binder resins. The external additives include a first silic... | 07/01/2008 |
| 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 carrier uniformly without contacting the latent image carrier; an electro... | 06/24/2008 |
| 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 9 μm; a particle size distribution that has an integrated value of ... | 06/24/2008 |
| 7371495 | Toner A toner is formed of toner particles including a polyester resin as a principal component, and at least a colorant and a charge control agent, and externally added inorganic fine particles and organic fine particles. The toner has a volume-average diameter of 4 to 1... | 05/13/2008 |
