Patent application number | Description | Published |
20090220255 | MAINTENANCE UNIT AND MAINTENANCE METHOD OF IMAGE FORMING APPARATUS - It is possible to provide a technique capable of grasping the necessity of the maintenance for a plurality of maintenance-oriented components in managing a maintenance work in an image forming apparatus containing the plurality of maintenance-oriented components. | 09-03-2009 |
20120170949 | IMAGE FORMING APPARATUS AND TONER REPLENISHING METHOD - An image forming apparatus, comprising, an exposure portion to expose a surface of an image carrier to form an electrostatic latent image; a developing device which includes an agitating roller to agitate developer, a developing roller to transfer toner of the developer on a surface of the image carrier and a toner concentration sensor to detect a toner concentration, said developing device developing the electrostatic latent image formed on the image carrier to form a toner image; a drive source to independently drive to rotate the developing roller and the agitating roller; and a control unit to control the drive source to change a rotational frequency of at least one of the developing roller and the agitating roller depending on the toner concentration detected by the toner concentration sensor. | 07-05-2012 |
20120328977 | TONER AND PROCESS FOR PRODUCTION THEREOF - Encapsulated toner particles are formed by: aggregating core material particles containing at least a colorant and a core material resin in an aqueous dispersion medium to form core particles; adding coating resin particles into the aqueous dispersion medium during progress of the formation of the core material at a point of time when the volume-based median particle diameter of the core particles formed by the aggregation reaches 30 to 83% of that of desired toner particles; and continuing the aggregation to form a coating layer composed of a composite aggregate of the core material particles and the coating resin particles on the core material. In the thus-obtained toner, the colorant is uniformly and well incorporated in the toner particles, and therefore, the coloring ability is improved without causing a problem of release of fine powder. | 12-27-2012 |
20130011775 | TONER AND PROCESS FOR PRODUCTION THEREOF - Disclosed is a toner obtained by coating surfaces of core particles including at least a binder resin having a carboxyl group and a coloring agent with successive coatings of a water-soluble crosslinking agent capable of crosslinking with a carboxyl group and a water-soluble polymer having a carboxyl group, which have been successively applied on the core particles and crosslinked with each other. The thus-formed toner is provided with a good harmony of favorable fixability represented by a low lowest fixable temperature and favorable storage stability represented by little aggregation after standing at 50° C. for 8 hours. | 01-10-2013 |
20130137031 | ELECTROPHOTOGRAPHIC TONER AND METHOD FOR PRODUCING THE SAME - An electrophotographic toner produced by mixing a dispersion of colorant particles containing a colorant and a dispersion of release agent particles containing a release agent and having a volume average particle diameter smaller than that of the colorant particles, aggregating the colorant particles and the release agent particles in the dispersion to produce first aggregates, mixing a dispersion of resin particles containing a binder resin and having a volume average particle diameter smaller than that of the release agent particles in the dispersion containing the first aggregates, and aggregating the first aggregates and the resin particles in the dispersion of the first aggregates and the resin particles to coat the first aggregates with the resin particles, producing second aggregates. | 05-30-2013 |
20130196264 | ELECTROPHOTOGRAPHIC TONER AND METHOD FOR PRODUCING THE SAME - A decolorizable electrophotographic toner, including: toner particles, the toner particle comprising a binder resin; and colorant particles which contain an electron donating color developable agent, an electron accepting color developing agent, and a decolorizing temperature control agent, and have a capsule structure coated with an outer shell, wherein
| 08-01-2013 |
20140064750 | DEVELOPER AND TEST METHOD THEREOF - A color-fadable developer contains a binder resin, a color generation compound and a color developing agent. When the developer is heated from a temperature range of 0° C. to 20° C. to a temperature range of 150° C. to 180° C. at a temperature increase rate range of 5° C./min to 10° C./min a first time and a second time, a first differential scanning calorimetry curve based on a measurement by differential scanning calorimetry during the first heating has an endothermic peak that is missing from a second differential scanning calorimetry curve based on a measurement differential scanning calorimetry during the second heating, and has a different peak than the endothermic peak caused by a glass transition point of a binder resin. | 03-06-2014 |
20140199626 | METHOD OF MANUFACTURING ERASABLE TONER - According to one embodiment, a method of manufacturing an erasable toner includes washing toner particles including therein a coloring material that is erasable by heating and a binder resin to obtain a toner cake having the amount of water of 20% by weight to 60% by weight, and drying the toner cake at 40° C. or more and at a temperature which is lower than the complete color erasing temperature of the toner particles by 30° C. or more. | 07-17-2014 |
20140212805 | DECOLORIZABLE TONER - Provided is a decolorizable toner including a binder resin and colorant particles which contain a color developable compound, a color developing agent, and a decolorizing agent, and have a capsule structure coated with an outer shell, wherein the binder resin is contained in an amount of 60 to 80% by mass with respect to the total amount of the toner components. | 07-31-2014 |
20140234768 | TONER AND METHOD FOR PRODUCING THE SAME - Provided is a method for producing a toner including: aggregating colorant particles and release agent particles, thereby forming aggregates containing the colorant particles and the release agent particles; aggregating binder resin particles and the obtained aggregates containing the colorant particles and the release agent particles, thereby forming toner particle precursors; and aggregating and fusing the obtained toner particle precursors, thereby forming toner particles, wherein when the average circularity of the toner particles is represented by Rt, Rt satisfies the following formula (1): 0.85≦Rt≦0.92 (1). | 08-21-2014 |