Patent application number | Description | Published |
20080226356 | IMAGE DEVELOPER USING ONE-COMPONENT DEVELOPER - An image developer using a one-component developer, Including a developing roller visualizing an electrostatic latent image formed on an image bearer with a pulverized toner; and a feed roller feeding the pulverized toner to the developing roller while contacting thereto, wherein the pulverized toner includes a parent toner; a wax; and an external additive comprising an additive having a number-average particle diameter of from 20 to 60 nm and adhering to the surface of the parent toner at an adherence strength of from 50 to 70%, and wherein the following relationships (1) to (3) are satisfied: | 09-18-2008 |
20080227009 | DEVELOPING DEVICE AND IMAGE FORMING METHOD USING ONE COMPONENT DEVELOPER, AND PROCESS CARTRIDGE USING THE DEVELOPING DEVICE - A developing device including a developing roller and a developer layer forming member for forming a layer of a one component developer on the roller. The developing device satisfies the relationships (1) 20Q/M>13.1α−44.5, wherein X represents the ratio (% by weight) of the wax present on the surface of the developer to the total of the wax therein; α represents the angle formed by a tangent line to the member at a point B, which is the center of the contact zone of the member contacted with the roller, and another tangent line at a point A thereof 0.5 mm apart from the point B toward the tip of the member, wherein α is 0 to π/2 radian; and Q/M represents the charge quantity (μC/g) of the toner per unit weight. | 09-18-2008 |
20080233506 | TONER, AND OILLESS FIXING METHOD AND PROCESS CARTRIDGE USING THE TONER - A toner useful for an oilless fixing method, includes a binder resin; a colorant; and 2.0 to 4.5% by weight of a wax which is soluble in n-hexane, based on a total weight of the toner, wherein the wax is dispersed in the toner, the wax forming wax domain particles (DA) comprising wax domain particles (DS) exposed at a surface of the toner and wax domain particles (DI) encapsulated in the toner and not exposed at the surface of the toner, wherein a weight of the DS is greater than a weight of the DI, wherein the toner from which the DS have been eluted with n-hexane comprises vestigial concavities having an area of 0.01 πμm | 09-25-2008 |
20090041511 | SINGLE COMPONENT DEVELOPMENT DEVICE, PROCESS CARTRIDGE AND TONER - A single component development device including a toner including a resin, a coloring agent, a wax, a charge control agent and an inorganic particulate, a development roller to bear the toner on the surface of the development roller and transfer the toner to an image bearing member and a thin layer forming member to regulate a thickness of the layer of the toner while in contact with the surface of the development roller via the toner borne thereon, wherein a regulating pressure A between the thin layer forming member and the development roller is from 25 to 60 (N/m), a content Z (weight %) of the charge control agent satisfies the following relationship (1) and an average dispersion particle diameter D (nm) of the charge control agent satisfies the following relationship (2): | 02-12-2009 |
20090068579 | FULL-COLOR TONER FOR ELECTROPHOTOGRAPHY, AND PRODUCTION METHOD FOR THE SAME - A production method for a full-color toner for electrophotography includes melt-kneading a toner material by use of an open-roll kneader, the toner material containing at least a binder resin, a wax, a colorant, and a charge control agent, wherein Mze/Mzi is 0.3 to 0.7, where Mze is a Z-average molecular weight of a resin component of the toner material to be supplied in the open-roll kneader, and Mzi is a Z-average molecular weight of a resin component of a kneaded product to be discharged from the open-roll kneader, and wherein a zirconium compound of a salicylic acid derivative is used as the charge control agent. | 03-12-2009 |
20090155710 | METHOD OF MANUFACTURING TONER AND TONER PRODUCED BY THE METHOD - A method of manufacturing toner including the steps of preparing a preliminary mixture by mixing a colorant and a release agent; preparing a raw material mixture by mixing the preliminary mixture with a binder resin and other raw materials; melt-kneading the raw material mixture using an open system roll type kneader; pulverizing the melt-kneaded raw material mixture into fine particles; and classifying the fine particles to prepare a toner. | 06-18-2009 |
20090233218 | METHOD FOR PREPARING TONER - A method for preparing a toner including as toner components at least a binder resin, a pigment and a dispersant for the pigment. The method includes firstly mixing at least the pigment and the dispersant to prepare a first mixture; secondly mixing the first mixture with the other toner components including at least the binder resin to prepare a second mixture; kneading the second mixture using an open roll kneader; pulverizing the kneaded material to prepare a colored powder; and classifying the colored powder to prepare particles of the toner, wherein the binder resin includes a polyester resin, and the dispersant includes a fatty acid ester. | 09-17-2009 |
20100227266 | TONER FOR FORMING IMAGES, ONE-COMPONENT DEVELOPER, TWO-COMPONENT DEVELOPER, IMAGE FORMING METHOD, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - A toner prepared by pulverization methods, including a binder resin; and a colorant, wherein the binder resin is prepared by melting and kneading a polyester resin having an unsaturated bond with a crosslinking reaction initiator diluted with a release agent, and the colorant is a press cake pigment after washed. | 09-09-2010 |
20100310980 | TONER, AND DEVELOPER, DEVELOPER CONTAINER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD USING THE TONER - A toner, including a colorant; a binder resin; a release agent; and a fixing supplemental component, wherein the toner has a storage elastic modulus G′ (Pa) satisfying the following conditions: | 12-09-2010 |
20110076610 | METHOD OF MANUFACTURING TONER AND TONER MANUFACTURED BY THE METHOD - A method of manufacturing toner including melting, mixing, and kneading a releasing agent and a coloring agent with at least part of a polyester binder resin, and suspending and granulating an oil phase comprising the binder resin, the coloring agent, and the releasing agent in an aqueous medium. | 03-31-2011 |