| Patent application number | Description | Published |
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| 20080238450 | METHOD FOR INSPECTING QUALITY OF CORE MATERIAL FOR ELECTROPHOTOGRAPHIC FERRITE CARRIER - An object of the present invention is to provide a quality inspection method for obtaining a specifying factor which can more reliably indicate powder characteristics of a core material for an electrophotographic ferrite carrier. To achieve the object, a method for inspecting the quality of a core material for an electrophotographic ferrite carrier adopts a method characterized in that the impedance of the core material for the electrophotographic ferrite carrier is measured by using an AC-resistance measurement method to obtain a Nyquist diagram (Cole-Cole plot) in which a real number impedance (Z′) is arranged in an X-axis and an imaginary number impedance (Z″) is arranged in a Y-axis and then the characteristics of the particles of the core material for the electrophotographic ferrite carrier is evaluated by using the Nyquist diagram (Cole-Cole plot). Here, the quality of a core material for the electrophotographic ferrite carrier is judged according to a predetermined equivalent circuit by using the value of the parameters one or two or more in combination selected from |Rs|, Rp | 10-02-2008 |
| 20100111816 | INORGANIC PARTICLE-CONTAINING EMULSION AND MANUFACTURING METHOD OF A PARTICLE BY USING THE INORGANIC PARTICLE-CONTAINING EMULSION - The invention aims at providing an inorganic particle-containing emulsion which enables further size reduction of particles and can bring about a mono-disperse system and an enhanced yield and a manufacturing method of a particle by the use of the emulsion. This aim can be performed by a water in oil emulsion prepared by mixing an oil phase liquid and an water phase liquid which contains inorganic particles under agitation, in which the water phase liquid contains inorganic particle having a specific gravity of 1.5 to 11 g/cm | 05-06-2010 |
| 20110013948 | CORE MATERIAL OF CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER AND METHOD FOR MANUFACTURING THE CORE MATERIAL, CARRIER AND METHOD FOR MANUFACTURING THE CARRIER, AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE CARRIER - Objects of the present invention are to provide a carrier core material for an electrophotographic developer having a true spherical shape and excellent strength, and a controllable true density and/or apparent density, and a method for manufacturing the carrier core material, a carrier and a method for manufacturing the carrier, and an electrophotographic developer using the carrier. In order to achieve the objects, there are employed a carrier core material for an electrophotographic developer, containing 3 to 100% by number of hollow particles having an iron content of 36 to 78% by weight, and a carrier for an electrophotographic developer, obtained by coating a resin on a surface of the carrier core material, and methods for manufacturing these, and an electrophotographic developer using the carrier. | 01-20-2011 |
| Patent application number | Description | Published |
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| 20090246670 | CARRIER PARTICLES FOR FORMING WIRING CIRCUIT PATTERN AND DEVELOPER - Carrier particles for forming a wiring circuit pattern by an electrophotographic developing method which are used for directly forming a circuit shape on an insulating layer, with any of a metal powder, an inorganic compound powder, or a mixed raw material powder thereof used as a toner powder for forming a circuit, the toner powder for forming a circuit being adhered to a surface of the carrier particles by electrostatic force and then transported to a surface of the insulating layer, wherein the carrier particles include a resin coated layer of an acrylic resin composition containing an amino-group-containing polymer on the surface of the carrier core material particles, the coating amount of the acrylic resin composition is 0.3 to 3.0% by weight based on a carrier core material weight of 100% by weight, and a shape factor SF-1 of the carrier core material particles is 100 to 110. | 10-01-2009 |
| 20090246676 | CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER, AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE CARRIER - A carrier core material for an electrophotographic developer including Li ferrite, maghemite, and Fe | 10-01-2009 |
| 20090246677 | CARRIER CORE MATERIAL FOR AN ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER, AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE CARRIER - A carrier core material for an electrophotographic developer containing Li ferrite, maghemite, and Fe | 10-01-2009 |
| 20100196818 | CARRIER CORE MATERIAL AND CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER AND PROCESS FOR PRODUCING THE SAME, AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE CARRIER - Employment of a carrier core material for an electrophotographic developer containing 0.8 to 5% by weight of Mg, 0.1 to 1.5% by weight of Ti, 60 to 70% by weight of Fe and 0.2 to 2.5% by weight of Sr and having an amount of Sr dissolved with a pH4 standard solution of 80 to 1000 ppm, a carrier using the core material and a process for producing them, and an electrophotographic developer using the carrier. | 08-05-2010 |
| 20110129772 | POROUS FERRITE CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, RESIN-FILLED FERRITE CARRIER AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE FERRITE CARRIER - A porous ferrite core material for an electrophotographic developer, the porous ferrite core material including Mg in a content of 0.3 to 3% by weight, Ti in a content of 0.4 to 3% by weight and Fe in a content of 60 to 70% by weight, and the porous ferrite core material having a pore volume of 0.04 to 0.16 ml/g, a peak pore size of 0.4 to 1.6 μm, a saturation magnetization of 40 to 80 Am | 06-02-2011 |
