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公开(公告)号：US20210364944A1
公开(公告)日：2021-11-25
申请号：US17322298
申请日：2021-05-17
Applicant: KYOCERA Document Solutions Inc.
Inventor： Masashi FUJISHIMA , Norio KUBO , Asami SASAKI , Yasuhiro TAUCHI , Tamotsu SHIMIZU , Akira MATAYOSHI , Masaki KADOTA , Koji SUENAMI , Yuji TOYOTA
IPC: G03G15/08
Abstract: A developing device includes a developer container, a developer carrier, and first and second stirring/conveying members. The developer container includes a first partition wall partitioning between the two conveying chambers longitudinally, a first communication portion for passing developer from the first to the second conveying chamber, a second communication portion for passing developer from the second to the first conveying chamber, a developer supply port for supplying developer in, a developer discharge portion for discharging excessive developer, a second partition wall arranged, adjacent to the regulating portion, downstream of the second communication portion to partition between the first conveying chamber and the regulating portion, and a shield portion connected to the two partition walls to bridge between them to shield a top part of the second communication portion. A gap is formed between an upper end part of the shield portion and the inner surface of the developer container.
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公开(公告)号：US20210302870A1
公开(公告)日：2021-09-30
申请号：US17210395
申请日：2021-03-23
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kazunori TANAKA , Yoshihiro YAMAGISHI , Tamotsu SHIMIZU
IPC: G03G15/06
Abstract: An image forming apparatus includes: a development device that develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger that charges the photosensitive drum; a development power supply that applies a prescribed bias voltage to the development device; an electric current measuring section that measures a development current flowing in the development device; and a calculating section that calculates a surface potential of the photosensitive drum based on the development current. The development device sequentially forms a plurality of image formation toner images on respective sheets of a recording medium. The image formation toner images each are a toner image for image formation. The electric current measuring section measures the development current in a period during which the image formation toner images are not formed.
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公开(公告)号：US20210041802A1
公开(公告)日：2021-02-11
申请号：US16985151
申请日：2020-08-04
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Mitsuhiro HASHIMOTO , Takahiro OKUBO , Kazuhiro NAKACHI , Shiro KANEKO
Abstract: An image forming apparatus includes an image forming portion, a high-voltage generation circuit, a current detection portion and a control portion. The image forming portion includes an image carrying member, a charging device, an exposure device and a developing device which includes a developer carrying member for carrying a developer including a carrier and a toner. The control portion can perform a development ghost prediction mode that includes a step of measuring the amount of charge of the toner within the developing device at the time of non-image formation, a step of measuring, as a carrier current, the direct-current component of a development current when the amount of development of the toner is 0 [mg/cm2] and a step of estimating the level of occurrence of development ghost and the cause of occurrence based on the amount of charge of the toner and the carrier current which are measured.
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公开(公告)号：US20180203376A1
公开(公告)日：2018-07-19
申请号：US15851371
申请日：2017-12-21
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU
IPC: G03G15/09
CPC classification number: G03G15/0928 , G03G15/0812 , G03G15/0818 , G03G15/0893
Abstract: A developing device includes a development roller, a layer-thickness limiting member, and a first screw. The development roller includes a fixed magnet and a sleeve. The first screw supplies developer to the development roller while conveying the developer in a first conveyance direction. The sleeve includes a plurality of recesses. Each of the recesses has an elongated shape, and a downstream end and an upstream end in the first conveyance direction. The downstream end is located farther downstream in a rotational direction of the sleeve than the upstream end. When the developer in each of the recesses passes the layer-thickness limiting member, the developer moves upstream in the first conveyance direction.
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公开(公告)号：US20150331354A1
公开(公告)日：2015-11-19
申请号：US14713799
申请日：2015-05-15
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Akihiro WATANABE , Akira MATAYOSHI
IPC: G03G15/08
CPC classification number: G03G15/0822 , G03G15/0812 , G03G15/0813 , G03G15/0818 , G03G15/75
Abstract: A photosensitive drum is axially rotatable and has a surface on which an electrostatic latent image is formed. A developing device includes a development roller spaced from the photosensitive drum. The development roller includes a cylindrical sleeve and a coating layer, and the photosensitive drum includes a cylindrical tube and a functional layer. Each of the coating layer and functional layer is formed by dipping the sleeve or tube into a dipping bath with the sleeve or tube directed axially vertically. An axial end portion of the development roller that is lower during the dipping process is disposed opposite to an axial end portion of the photosensitive drum that is higher during the dipping process, and an axial end portion of the development roller that is higher during the dipping process is disposed opposite to an axial end portion of the photosensitive drum that is lower during the dipping process.
Abstract translation: 感光鼓可轴向旋转并具有形成有静电潜像的表面。 显影装置包括与感光鼓间隔开的显影辊。 显影辊包括圆柱形套筒和涂层，感光鼓包括圆柱形管和功能层。 每个涂层和功能层通过将套筒或管浸入浸渍浴中形成，套筒或管轴向垂直地指向。 显影辊的在浸渍过程中较低的轴向端部设置成与浸渍过程中感光鼓的轴向端部相对较高，而在浸渍过程中显影辊的轴向端部较高 工艺在浸渍过程中与感光鼓的轴向端部相对设置，其较低。
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Patent Agency Ranking
公开(公告)号：US20150253693A1
公开(公告)日：2015-09-10
申请号：US14632225
申请日：2015-02-26
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Akira MATAYOSHI
IPC: G03G15/08
CPC classification number: G03G15/0889 , G03G15/0858 , G03G15/0893 , G03G21/105
Abstract: A developing device includes a housing, a stirring member, a developing unit body, a driving device, a detecting device, and a control device. The housing accommodates developer supplied from a supply means and including toner and carrier. The stirring member rotates in the housing to stir the developer. The developing unit body rotates in the housing to convey the developer toward an image carrying member from the stirring member and attaches the toner to the image carrying member. The driving device rotationally drive at least one of the stirring member and the developing unit body. The detecting device detects the torque of the driving device. The control device performs a recovery process of controlling the supply means to supply at least one of the carrier and the developer to an interior of the housing when a detection result of the detecting device has a value lower than a threshold value.
Abstract translation: 显影装置包括壳体，搅拌构件，显影单元体，驱动装置，检测装置和控制装置。 壳体容纳从供给装置供应的显影剂，并且包括调色剂和载体。 搅拌构件在壳体中旋转以搅拌显影剂。 显影单元主体在壳体中旋转以将显影剂从搅拌构件传送到图像承载构件，并将调色剂附着到图像承载构件。 驱动装置旋转地驱动搅拌构件和显影单元主体中的至少一个。 检测装置检测驱动装置的扭矩。 当检测装置的检测结果具有低于阈值的值时，控制装置执行恢复处理，该恢复处理控制供应装置将载体和显影剂中的至少一个供应到壳体的内部。
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公开(公告)号：US20140140733A1
公开(公告)日：2014-05-22
申请号：US14084416
申请日：2013-11-19
Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
Inventor： Tamotsu SHIMIZU , Shizuka OKADA , Takefumi YOTSUTSUJI , Akifumi YAMAGUCHI
CPC classification number: G03G15/0877 , G03G15/0893
Abstract: In a development device, a developer carrier arranged in a housing containing a one-component developer has a circumferential surface carrying the developer. A developer conveying path includes one conveying path along the developer carrier in a first direction and another conveying path in a second direction opposite to the first direction. The developer is circulated and conveyed between the conveying paths. A developer conveying member is arranged in the one conveying path and rotationally driven to convey the developer along the first direction and to supply the developer to the developer carrier. A layer thickness adjusting member is arranged at a distance from the circumferential surface to adjust a layer thickness of the developer supplied to the developer carrier. The developer carrier has a circumferential speed Vd and the developer conveying member has a circumferential speed Vs so that a circumferential speed ratio Vd/Vs satisfies a relationship represented by 1.3≦Vd/Vs≦5.0.
Abstract translation: 在显影装置中，布置在包含单组分显影剂的壳体中的显影剂载体具有携带显影剂的圆周表面。 显影剂输送路径包括沿着第一方向沿着显影剂载体的一个输送路径和在与第一方向相反的第二方向上的另一输送路径。 显影剂在传送路径之间循环传送。 显影剂输送构件布置在一个输送路径中并旋转驱动以沿着第一方向输送显影剂，并将显影剂供应到显影剂载体。 层厚度调节构件布置成与圆周表面一段距离，以调节供应到显影剂载体的显影剂的层厚度。 显影剂载体具有圆周速度Vd，显影剂传送构件具有圆周速度Vs，使得圆周速度比Vd / Vs满足由1.3＆lt; 1lE; Vd / Vs＆nlE; 5.0表示的关系。
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公开(公告)号：US20250123579A1
公开(公告)日：2025-04-17
申请号：US18911965
申请日：2024-10-10
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kazuki NAKAI , Yoshihiro YAMAGISHI , Tamotsu SHIMIZU , Shiori KIHARA , Shinya SAKAOKA
Abstract: An image forming apparatus includes an image forming portion, a toner storage container, an odor generator, an odor sensor, and a control portion. The image forming portion includes an image carrying member and a development device that develops an electrostatic latent image formed on the image carrying member into a toner image, and forms the toner image based on image data. The toner storage container stores toner for forming the toner image, and is removably mountable in a main body of the image forming apparatus. The odor generator is provided on the toner storage container, and carries an odor substance. The odor sensor is provided in the main body of the image forming apparatus, and senses the odor substance diffusing from the odor generator. The control portion identifies the type of toner storage container based on the odor substance sensed by the odor sensor.
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公开(公告)号：US20250110417A1
公开(公告)日：2025-04-03
申请号：US18893376
申请日：2024-09-23
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Akira MATAYOSHI , Norio KUBO , Asami SASAKI , Kazuaki FUJIWARA , Einosuke KIKUCHI
Abstract: An image forming apparatus includes a two-component developer, a photosensitive member, a charging device, a development device and an intermediate transfer belt. The intermediate transfer belt contains a base resin and a conductive agent. The base resin includes a thermoplastic resin or a thermosetting resin. The photosensitive member includes a base member and an amorphous silicon photosensitive layer. The arithmetic average roughness Ra of the surface of the photosensitive member is equal to or greater than 37 nm but equal to or less than 105 nm. The toner particle includes a toner base particle and a toner external additive that is adhered to the surface of the toner base particle. The toner external additive includes a spacer particle. The number average primary particle diameter of the spacer particle is greater than the arithmetic average roughness Ra of the surface of the photosensitive member.
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公开(公告)号：US20240329555A1
公开(公告)日：2024-10-03
申请号：US18576627
申请日：2022-03-31
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Kohei TERASAKI , Yuma UCHIHASHI , Yusuke KURANO
CPC classification number: G03G9/1139 , G03G9/1075 , G03G9/1131 , G03G9/1136
Abstract: In a two-component developer, external additive particles of toner particles include silica particles. The silica particles have a number average primary particle diameter of at least 30 nm and no greater than 120 nm. Coat layers of carrier particles contain a coating resin and barium titanate particles. The coating resin includes a silicone resin. The barium titanate particles have a number average primary particle diameter of at least 100 and no greater than 500 nm. The barium titanate particles have a content of at least 5 parts by mass and no greater than 45 parts by mass relative to 100 parts by mass of the coating resin. A rate of a mass of the coat layers to a mass of the carrier cores is at least 0.09% by mass and no greater than 4.90% by mass. A coverage rate of the carrier cores is at least 80.0% and less than 100.0%.
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