Patent application number | Description | Published |
20080220357 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE USING THE TONER - A toner including a binder resin including a polyester resin and a vinyl resin; a wax; and a colorant, wherein the vinyl resin includes a unit obtained from a radically polymerizable monomer having an alkyloxysilyl group. An image forming apparatus including an image bearing member configured to bear an electrostatic image thereon; a developing device configured to develop the electrostatic image with a developer including the toner to form a toner image on the image bearing member; and a transfer device configured to transfer the toner image onto a receiving material. A process cartridge including an image bearing member; and a developing device configured to develop an electrostatic image on the image bearing member with a developer including the toner, wherein the process cartridge is detachably attached to an image forming apparatus as a unit. | 09-11-2008 |
20080227001 | IMAGE FORMING METHOD AND PROCESS CARTRIDGE - An image forming method, including recharging untransferred toner remaining on a latent electrostatic image bearing member by using a recharging member to remove the untransferred toner from the latent electrostatic image bearing member, wherein the recharging member is a conductive member a surface of which has a contact angle of 108° or more with pure water and a Shore D hardness of 50 to 65; the coverage of the surface of the toner by an external additive is 150% or less; and a releasing agent peak ratio obtained by ATR method is 0.02 to 0.1. | 09-18-2008 |
20080227013 | TONER AND PROCESS CARTRIDGE - A toner including a fluorine-containing compound partially comprising a quaternary ammonium group at the surface thereof, which is prepared by a method, including dispersing or emulsifying an oil phase including toner constituents including a pigment, and at least one member selected from the group consisting of modified layered inorganic minerals partially including a quaternary alkylammonium group and toner constituent precursors in an aqueous medium, wherein the toner constituents includes the modified layered inorganic mineral in an amount of from 0.05 to 2% by weight and the toner includes a fluorine atom in an amount of from 0.02 to 0.075 K cps when measured with a fluorescent X-ray. | 09-18-2008 |
20080227016 | LATENT ELECTROSTATIC IMAGE DEVELOPING TONER, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A latent electrostatic image developing toner of the present invention is mainly composed of two or more binder resins, a colorant, a releasing agent and a layered compound. A first binder resin of the binder resins is a polyester resin with an acid value of 15 KOHmg/g or less. The layered compound is a compound in which at least some interlayer ions are modified by organic ions. Toner particles are prepared by granulation in an aqueous medium, and the layered compounds are localized in the surface of the particles by the pelletization in the granulation. The average circularity of the particles is 0.970 or more. | 09-18-2008 |
20080232857 | IMAGE FORMING APPARATUS - An image forming apparatus having at least a latent electrostatic image bearing member, and a recharging unit configured to recharge a residual toner remaining on the latent electrostatic image bearing member, wherein after transfer, the residual toner is passed through the recharging unit and is then recovered in a developing device; a charging component of the recharging unit that comes into contact with the latent electrostatic image bearing member is a polymer sheet having a surface roughness (Ra) of 0.12 μm to 0.51 μm; the toner contains at least a pigment, a binder resin, and a releasing agent, and contains inorganic fine particles as an external additive, and the amount of the inorganic fine particles and the amount of the releasing agent satisfy three specific Expressions. | 09-25-2008 |
20080233497 | TONER FOR DEVELOPING LATENT ELECTROSTATIC IMAGE, PROCESS CARTRIDGE AND IMAGE FORMING METHOD - A toner for developing a latent electrostatic image produced by suspension polymerizing a polymerizable monomer composition in an aqueous dispersion medium, wherein the polymerizable monomer composition contains a polymerizable monomer, a colorant, and a layered inorganic mineral in which at least a part of an interlayer ion is replaced with an organic ion, and a process cartridge and an image forming method using the toner. | 09-25-2008 |
20080233510 | TONER AND METHOD FOR PRODUCING THE SAME, TONER CONTAINER, DEVELOPER, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - Disclosed is a non-magnetic toner for use in developing electrostatic toner image, wherein the toner is produced by a toner production method that includes: dispersing in an aqueous medium an organic dispersion liquid that comprises in an organic solvent a pigment, a binder resin and/or a binder resin precursor, and a releasing agent; removing the organic solvent to prepare a dispersion slurry in which toner particles are dispersed in the aqueous medium; heating the dispersion slurry to a temperature equal to or higher than the melting point of the releasing agent; and washing the toner particles. | 09-25-2008 |
20080233511 | TONER, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE USING THE SAME - A toner including particles including a toner composition including a binder resin and a coloring material, wherein the toner composition includes a laminate compound A in which a cation between layers is modified by an organic cation, and a laminate compound B in which an anion between layers is modified by an organic anion, the laminate compound A is of negative charging property upon particulation of the laminate compound A by dispersion or internal addition in the binder resin and the laminate compound B is of positive charging property upon particulation of the laminate compound B by dispersion or internal addition in the binder resin, and the toner is of a positive charging property. | 09-25-2008 |
20080279591 | One-component toner and image forming method - The present invention is to provide a nonmagnetic one-component toner containing a colorant, and a binder resin, wherein metal oxide fine particles are fixed on a toner surface with an adhesion strength of 95% to 99%, the toner has a direct current resistance of 1E7 Ω·cm to 1E9 Ω·cm, and an electrostatic capacity of 1.0E-12F to 1.5E-11F. | 11-13-2008 |
20090017391 | TONER, METHOD FOR MANUFACTURING THE TONER, AND PROCESS CARTRIDGE USING THE TONER - A toner including a colorant, a polyester (I), and an urea-modified polyester is provided. The urea-modified polyester is a reaction product of an isocyanate-modified polyester with an amine. The isocyanate-modified polyester is obtained by modifying a polyester (II) with an isocyanate. The polyester (II) has specific number average molecular weight (Mn) and hydroxyl value [OHV]. The toner can be manufactured by dispersing or emulsifying a toner constituent liquid including the colorant, the polyester (I), and the isocyanate-modified polyester, in an aqueous medium. The toner can be used for a one-component developing device. | 01-15-2009 |
20090220879 | TONER FOR DEVELOPING LATENT ELECTROSTATIC IMAGE, IMAGE FORMING DEVICE AND PROCESS CARTRIDGE USING THE SAME - Provision of a toner for developing a latent electrostatic image, including a colorant, a binder resin, and a releasing agent, where molecular weight distribution of THF-soluble components of the toner measured by a GPC is in the range of Mw 4,000 to Mw 11,000, and a peak area of low molecular weight components having a molecular weight of 200 to 500 is 3.2% or less based on the whole peak area. | 09-03-2009 |
20090233199 | GLOSS CONTROL PARTICLE, DEVELOPER SET, AND IMAGE FORMING METHOD - A gloss control particle is provided that is configured to form a transparent and colorless gloss control layer on a colored toner image which is to be fixed on a recording medium upon application of heat, wherein the gloss control particle contains a binder resin and a softening agent configured to soften the binder resin upon application of heat, along with a developer containing the gloss control particle and an image forming method using the developer containing the gloss control particle. | 09-17-2009 |
20090297975 | TONER, DEVELOPER, TONER CONTAINER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A toner manufactured by a method including the steps of dissolving or dispersing toner components comprising a binder resin, a colorant, and an encapsulated plasticizer to prepare an oily toner components liquid, and emulsifying or dispersing the oily toner components liquid in an aqueous medium to prepare the toner. | 12-03-2009 |
20100239974 | TONER AND METHOD OF MANUFACTURING TONER - A toner containing a mother toner particle containing at least two kinds of resins having a polyester skeleton, and a coloring agent, and a releasing agent, wherein the mother toner particle has a core and a shell layer thereon, and no peak that derives from magnesium, calcium, or aluminum in the mother toner particle is observed in a qualitative analysis using an X-ray fluorescence measuring instrument. | 09-23-2010 |
20110045401 | IMAGE FORMING METHOD AND APPARATUS - An image forming apparatus, wherein a surface resistivity Rse[Ω] of a charger and a volume resistivity Rsw [Ω·cm] of the composition having a low softening point satisfy the following relationship: | 02-24-2011 |
20110053063 | TONER, DEVELOPER, DEVELOPING DEVICE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND METHOD OF MANUFACTURING TONER - A toner is provided including a core particle comprising a binder resin, a colorant, and a release agent, and a shell layer comprising particles of a vinyl resin. The vinyl resin comprises 80% by weight or more of a unit of an aromatic compound having a vinyl-polymerizable functional group. A method of manufacturing the above toner is also provided, including steps of dissolving or dispersing the binder resin, the colorant, and the release agent in an organic solvent to prepare an oily liquid, dispersing the oily liquid in an aqueous medium to prepare the core particles, and adhering particles of a vinyl resin to the surfaces of the core particles to form shell layers. | 03-03-2011 |