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Koetsuka
Kyohta Koetsuka, Kawasaki-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100158578 | DEVELOPMENT ROLLER, DEVELOPMENT DEVICE, PROCESSING CARTRIDGE AND IMAGE FORMING DEVICE - An image forming device comprises a process cartridge. The process cartridge comprises a development roller. The development roller comprises a magnet roller and a developing sleeve | 06-24-2010 |
Kyohta Koetsuka, Fujisawa City JP
| Patent application number | Description | Published |
|---|---|---|
| 20080232865 | MAGNET ROLLER, DEVELOPING AGENT CARRIER, DEVELOPING UNIT, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS USING SAME - A magnet roller for use with a hollow cylindrical structure made of a non-magnetic material includes a roller body and a reinforcing member. The roller body, encased in the hollow cylindrical structure, has at least one magnetic pole to form an agent releasing area on a skin of the cylindrical structure. The roller body is integrated with a shaft on each end portion of the roller body as one solid body. The reinforcing member is embedded in a portion of the roller body corresponding to the agent releasing area. The reinforcing member is made of a material different from a material used for the roller body and extends in an axial direction of the roller body. | 09-25-2008 |
| 20110130074 | MAGNETIC PARTICLE CARRYING DEVICE, AND DEVELOPING UNIT, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS USING THE SAME, AND SURFACE TREATMENT METHOD OF THE SAME - A magnetic particle carrying device includes a magnetic field generator and a hollow cylindrical structure. The magnetic field generator generates a magnetic field. The hollow cylindrical structure encases the magnetic field generator and attracts magnetic particles on an external surface of the hollow structure using the magnetic field. The external surface of the hollow cylindrical structure is provided with a plurality of elliptical depressions. The depressions include first type depressions and second type depressions. A long axis of a first type of elliptical depression is substantially extending in an axial direction of the hollow cylindrical structure, and a long axis of a second type of elliptical depression is substantially extending in a circumferential direction of the hollow cylindrical structure. The external surface of the hollow cylindrical structure has more elliptical depressions of the second type than elliptical depressions of the first type. | 06-02-2011 |
Kyohta Koetsuka, Kanagawa JP
| Patent application number | Description | Published |
|---|---|---|
| 20110194874 | DEVELOPMENT DEVICE, AND PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS INCORPORATING SAME - A development device includes a developer container, a developer carrier, exposed partly from a casing, facing a latent image carrier in a development area, a magnetic field generator inside the developer carrier, having multiple magnetic poles including a conveyance pole to convey the developer downstream from the development area to a developer release portion, a developer agitator, and a developer regulator. A predetermined gap is kept between an outer surface of the developer carrier and an inner wall of the casing downstream from an opening of the casing, upstream from a developer release portion, in a direction in which the developer carrier rotates. Multiple recesses are formed in the outer surface of the developer carrier at a pitch in a circumferential direction shorter than half a width of a magnetic flux density of the developer conveyance pole in a direction perpendicular to an axial direction of the developer carrier. | 08-11-2011 |