Shuichi Akedo
Shuichi Akedo, Osaka-Shi JP
Patent application number | Description | Published |
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20090324299 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device for developing an electrostatic latent image formed on an photoreceptor drum with a dual-component developer, includes: a developing hopper for storing the developer; an agitation roller for conveying the developer while agitating; a developing roller which supplies the developer to a developing area located opposing the photoreceptor drum; a layer thickness-regulating member for regulating the layer thickness of the developer being conveyed by the developing roller; a flow-guide plate for flowing down the surplus developer that was rejected to a position away from the layer thickness-regulating member; a multiple number of partitioning ribs arranged upright on the flow-guided plate for flowing down the surplus developer in a predetermined direction whilst diffusing the developer with respect to the longitudinal direction of the developer roller; and a downflow direction control mechanism for controlling the downflow direction of the surplus developer regulated by the partitioning ribs. | 12-31-2009 |
20110008068 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device is disclosed which includes a developing tank, a developing roller, a carrying member, and a filter. Rotation of the developing roller causes a first airflow directed from the outside of the developing tank through an air path to the inside of the developing tank. Rotation of the carrying member causes a second airflow directed from below in an upward direction inside the developing tank. Collision between the first airflow and the second airflow causes a third airflow directed from the inside of the developing tank through the filter to the outside of the developing tank and further from the outside through the filter back to the inside of the developing tank. This arrangement prevents not only filter clogging but also a toner leak to the outside of the developing device. | 01-13-2011 |
20110052271 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - An anti-accumulation section is provided at a section where an inner surface of a developer container abuts a surface of a doctor blade on an upstream side of a rotation direction of a developing roller. An angle between a surface of the anti-accumulation section facing the developing roller and the surface of the doctor blade on the upstream side of the rotation direction of the developing roller is set to be larger than an angle between a circle concentric with a cross section of the developing roller perpendicular to an extending direction of the developing roller and the surface of the doctor blade on the upstream side of the rotation direction of the developing roller at the section where the surface of the anti-accumulation section facing the developing roller and the surface of the doctor blade on the upstream side of the rotation direction of the developing roller abut. This realizes, with a simple configuration, a developing device capable of forming images of high quality without nonuniform development. | 03-03-2011 |
Shuichi Akedo, Osaka JP
Patent application number | Description | Published |
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20090245888 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A sleeve constituting a developing roller of a developing device has a cylindrical body with three layers composed of a base layer having rigidity and formed in a mesh-like shape, a filter layer for blocking toner passage, and a conductive layer to which a developing bias voltage is applied, which are arranged in this order from the inside. When a sucking device sucks from an open end of one end portion of the sleeve, an air flow going from the inside of the developing roller through the open end to outside is generated so that a pressure of the internal space of the developing roller becomes smaller compared with the outside. As the peripheral wall has air permeability in its thickness direction, air flows from the outer circumferential portion of the developing roller through the peripheral wall to the inside of the developing roller. | 10-01-2009 |
20100028052 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS AND TONER SUPPLYING METHOD USING THE SAME - A developing device includes: a developing vessel for storing a developer D containing a toner and a magnetic carrier; a first conveying passage for conveying the developer; a first conveying member provided in the first conveying passage for agitating and conveying the developer in a predetermined direction; a developing roller; a toner supply port for supplying toner to the first conveying passage; and an electromagnet arranged at the outer periphery of the toner supply port, and is constructed such that the toner supply port is formed over the first conveying member and the electromagnet intermittently attracts the developer residing under the toner supply port. | 02-04-2010 |
20110262187 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH SAME - A developing device includes: a developing tank for storing a developer containing a toner and a magnetic carrier, the developing tank including, inside thereof, a first developer carrying path; and a first stirring carrying member that rotates so that the first stirring carrying member carries the developer included in the first developer carrying path while stirring the developer. A toner supply opening is formed in a developing tank cover. An upper part of an inner wall surface of a side in which a developer sinks which inner wall surface faces downward rotation of the first stirring carrying member inclines from a direction perpendicular to a horizontal surface toward the first developer carrying path. An angle α made by (i) a tangential line of the upper inner wall surface at a position of the upper inner wall surface which position is at a height of a top part of an outer circumference of the first stirring carrying member and (ii) a horizontal line is not less than 100° but not more than 150°. This makes it possible to properly stir a supplied toner with an existing developer without applying excessive stress on the developer. | 10-27-2011 |
20130202329 | INTERMEDIATE HOPPER AND IMAGE FORMING APPARATUS - An intermediate hopper has a toner reception tub, a partition for dividing an internal space of the toner reception tub; a first and a second toner conveyance path; a first toner conveyance screw being provided in the first toner conveyance path; a second toner conveyance screw being provided in the second toner conveyance path; a toner receiving port for receiving the toner; a toner communicating path for guiding the toner in the first toner conveyance path to the second toner conveyance path; a toner discharge port; and a toner amount detection sensor, wherein the first toner conveyance screw further comprises an agitation plate disposed at a position facing the toner receiving port so as to extend radially from the first rotation axis and fixed in parallel with the first rotation axis, and the toner amount detection sensor is provided on an upstream side relative to the agitation plate. | 08-08-2013 |
Shuichi Akedo, Sakai-Shi JP
Patent application number | Description | Published |
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20080219699 | DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS COMPRISING SAME - The development device of the present invention has a rotating shutter supported rotatably between a supply opening formed on a toner supply device and a receiving opening formed on a developing tank. The rotating shutter has an open section extending in the axial direction of the roller-shaped main section as well as opened in the direction perpendicular to the axial direction thereof, opening and shutting the supply opening in conjunction with attachment and detachment operation of the developing tank. The rotating shutter shuts the supply opening by covering the supply opening with the outer surface of the roller-shaped main section, and opens the supply opening by communicating the supply opening and the receiving opening through the open section. Thus, it is possible to prevent the leakage of toner even after repetitively performing the attachment and detachment operation of the developing tank. | 09-11-2008 |
20090041506 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device for developing an electrostatic latent image formed on an image bearer with a dual-component developer, includes: a developing hopper for storing the developer; an agitation and conveying member for conveying the developer while agitating; a developer support which supports the developer that has been mixed and agitated inside the developing hopper and supplies the developer to a developing area located opposing the image bearer; a layer thickness-regulating member for regulating the layer thickness of the developer being conveyed by the developer support; a flow-guide plate member for flowing down the surplus developer that was rejected and conveyed away from the layer thickness-regulating member; a multiple number of diffusing elements arranged upright on the flow-guided plate member for flowing down the surplus developer in a predetermined direction whilst diffusing the developer with respect to the longitudinal direction of the developer support; and a down flow direction turning mechanism for periodically turning the downflow direction of the surplus developer regulated by the diffusing elements. | 02-12-2009 |
20090080909 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a toner cartridge supporting member which is movable between (i) an insertion position indicating that the toner cartridge is in the predetermined position and (ii) a draw-out position indicating that the toner cartridge is drawn out from the predetermined position; a detection device which detects a movement of the toner cartridge supporting member in a direction pointing from the insertion position toward the draw-out position; an information storage device which is provided in the toner cartridge; a connector which is provided so as to be detached from or fitted to the information storage device so as to be movable in a moving direction of the toner cartridge supporting member; and an information processing device which is capable of communicating with the information storage device via the connector and which carries out a communication stop process for causing a communication between the information processing device and the information storage device to be stopped when the detection device detects the movement of the toner cartridge supporting member. This prevents a communication error from occurring in the communication between the information storage device on the toner cartridge side and the information processing device on the image forming apparatus side when the toner cartridge is suddenly drawn out from the image forming apparatus. | 03-26-2009 |