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1. 发明申请

US20230137743A1 IMAGE FORMING APPARATUS CAPABLE OF ACCURATELY ACQUIRING ELECTRICAL RESISTANCE VALUE OF TRANSFER MEMBER, ELECTRICAL RESISTANCE VALUE ACQUISITION METHOD 有权
公开(公告)号：US20230137743A1
公开(公告)日：2023-05-04
申请号：US18050790
申请日：2022-10-28
申请人： KYOCERA Document Solutions Inc.
发明人： Ryota Okui , Yoshihiro Yamagishi , Tamotsu Shimizu , Kazuhiro Nakachi , Kazunori Tanaka
IPC分类号： G03G15/00 , G03G15/02
摘要： An image forming apparatus includes first, second, and third acquisition processing portions. The first acquisition processing portion acquires the potential value of a charged area, charged by the charging member, on the image-carrying member. The second acquisition processing portion acquires a state value regarding the state of a surface layer of the image-carrying member based on the potential value of the charged area acquired by the first acquisition processing portion and the current value of a charging current flowing through the charging member during formation of the charged area. The third acquisition processing portion acquires the electrical resistance value of the transfer member based on the state value acquired by the second acquisition processing portion, the voltage value of a transfer voltage applied to the transfer member, and the current value of a transfer current flowing through the charged area in response to application of the transfer voltage.

2. 发明申请

US20230137321A1 IMAGE FORMING APPARATUS CAPABLE OF ACQUIRING POTENTIAL VALUE OF EXPOSED AREA ON IMAGE-CARRYING MEMBER, POTENTIAL VALUE ACQUISITION METHOD 有权
公开(公告)号：US20230137321A1
公开(公告)日：2023-05-04
申请号：US18050783
申请日：2022-10-28
申请人： KYOCERA Document Solutions Inc.
发明人： Kazunori Tanaka , Yoshihiro Yamagishi , Tamotsu Shimizu , Kazuhiro Nakachi , Ryota Okui
IPC分类号： G03G15/00 , G03G15/02
摘要： An image forming apparatus includes a developing member, a first detection processing portion, and an acquisition processing portion. The developing member conveys developer to a facing portion between the developing member and the image-carrying member. The first detection processing portion detects a first development current for each of a plurality of specific voltages with different DC voltage values applied to the developing member, the first development current flowing, in response to application of the specific voltages, through the facing portion including the developer and a specific exposed area, formed by the light emitting portion, on the image-carrying member. The acquisition processing portion acquires a potential value of the specific exposed area based on the DC voltage values of the specific voltages and current values of the first development current, detected by the first detection processing portion, corresponding to the respective specific voltages.

3. 发明授权

US11143979B2 Image forming apparatus having simple configuration and capable of measuring toner current included in developing current, and accurately calculating toner charge amount based on measurement result 有权
公开(公告)号：US11143979B2
公开(公告)日：2021-10-12
申请号：US17098406
申请日：2020-11-15
申请人： KYOCERA Document Solutions Inc.
发明人： Tamotsu Shimizu , Mitsuhiro Hashimoto , Takahiro Okubo , Yohei Wakasa , Kazuhiro Nakachi
IPC分类号： G03G15/06
摘要： Provided is an image forming apparatus having a simple configuration capable of measuring a toner current included in a developing current and accurately calculating a toner charge amount based on the measurement result. A developing device has a developer carrier that carries a two-component developer including a magnetic carrier and toner. A developing voltage power supply applies a developing voltage obtained by superimposing an AC voltage on a DC voltage on the developer carrier. A control unit estimates a toner charge amount based on a toner current calculated by subtracting a carrier current from a developing current detected by a current detecting unit when a reference image is formed during non-image formation, and a toner developing amount calculated from the density of a reference image detected by a density detecting device.

4. 发明授权

US11131942B1 Image forming apparatus 有权
公开(公告)号：US11131942B1
公开(公告)日：2021-09-28
申请号：US17210345
申请日：2021-03-23
申请人： KYOCERA Document Solutions Inc.
发明人： Kazunori Tanaka , Yoshihiro Yamagishi , Tamotsu Shimizu
IPC分类号： G03G15/06
摘要： An image forming apparatus includes: a development device which develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger which charges the photosensitive drum; a development power supply which applies a bias voltage to the development device; an electric current measuring section which measures a development current flowing in the development device; and a calculating section which calculates a surface potential of the photosensitive drum based on the development current. The charger applies charging biases to the photosensitive drum. The electric current measuring section measures a corresponding value of the development current for each development bias voltage applied to the development device. The calculating section calculates, per charging bias, a development bias voltage at which the development current stops flowing as the surface potential, and calculates a correspondence between the surface potential and the charging bias based on calculated values of the surface potential.

5. 发明授权

US10921729B2 Image forming apparatus 有权
公开(公告)号：US10921729B2
公开(公告)日：2021-02-16
申请号：US16583430
申请日：2019-09-26
申请人： KYOCERA Document Solutions Inc.
发明人： Tamotsu Shimizu , Yasushi Imanishi , Satoshi Sunayama , Kazuhiro Nakachi , Ai Takagami , Kanako Kikuchi
IPC分类号： G03G15/06
摘要： A mode controller outputs a characteristic value according to a DC component of a developing current measured by an ammeter at a predetermined measurement timing. The measurement timing is defined as a timing at which a non-image forming region of a surface of a photosensitive drum is located opposite to a developing roller in the entirety of an axial direction and an electric field in a direction in which a toner moves from the photosensitive drum toward the developing roller by a potential difference between a surface potential of the photosensitive drum and the DC component of a developing bias is formed in a developing nip part. A determining section determines an execution timing for a charge amount acquisition operation according to the characteristic value output by the mode controller.

6. 发明授权

US10788771B2 Image forming apparatus with charging amount acquisition unit 有权
公开(公告)号：US10788771B2
公开(公告)日：2020-09-29
申请号：US16424536
申请日：2019-05-29
申请人： KYOCERA Document Solutions Inc.
发明人： Tamotsu Shimizu , Yasushi Imanishi , Kenichi Tamaki
IPC分类号： G03G15/06 , G03G15/08 , G03G15/00
摘要： An image forming apparatus includes a storage unit and a charging amount acquisition unit. The charging amount acquisition unit forms a measurement toner image on the image carrier while changing the frequency of the alternating current voltage of the development bias, acquires a tilt of a measurement straight line representing a relationship between the change amount of the frequency and a density change amount of the measurement toner image based on the change amount of the frequency and a result of detecting density of the measurement toner image in the density detecting unit, and acquires the charging amount of the toner based on the acquired tilt of the measurement straight line and the reference information in the storage unit.

7. 发明授权

US10185281B2 Image forming apparatus provided with a photosensitive member having a photosensitive layer and a surface protection layer which is formed on the surface of the photosensitive layer and which has a hardness higher than that of the photosensitive layer 有权
公开(公告)号：US10185281B2
公开(公告)日：2019-01-22
申请号：US15953039
申请日：2018-04-13
申请人： KYOCERA Document Solutions Inc.
发明人： Tamotsu Shimizu , Yoshihiro Yamagishi , Akifumi Yamaguchi , Koji Uno , Kenichi Kasama , Yuta Kitabayashi , Nobuyuki Hayashi
IPC分类号： G03G15/00 , G03G21/00 , G03G5/147 , G03G5/00 , G03G15/08
摘要： An image forming apparatus has a photosensitive member, a charging member, an exposing device, a developing device, a transfer member, a polishing member, a driving device, a voltage applying device, a torque detector, and a control portion. The photosensitive member has a photosensitive layer and a surface protection layer formed on the surface of the photosensitive layer. The polishing member has an elastic layer on its circumferential surface, and rotates with a linear velocity difference from that of the photosensitive member. The torque detector detects the torque of the driving device. The control portion estimates an attachment condition of discharge products to the surface of the photosensitive member based on the torque of the driving device detected by the torque detector. When the torque is equal to or higher than a predetermined value, the control portion performs an image degradation suppression process.

8. 发明授权

US09310718B2 Development device and image forming apparatus including the same 有权
标题翻译：显影装置及包括其的图像形成装置
公开(公告)号：US09310718B2
公开(公告)日：2016-04-12
申请号：US14084416
申请日：2013-11-19
申请人： KYOCERA DOCUMENT SOLUTIONS INC.
发明人： Tamotsu Shimizu , Shizuka Okada , Takefumi Yotsutsuji , Akifumi Yamaguchi
IPC分类号： G03G15/08
CPC分类号： G03G15/0877 , G03G15/0893
摘要： 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.
摘要翻译：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，并且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＆nlE; Vd / Vs＆nlE; 5.0表示的关系。

9. 发明授权

US09274453B2 Developing roller, developing device, and image forming apparatus including developing device 有权
标题翻译：显影辊，显影装置和包括显影装置的图像形成装置
公开(公告)号：US09274453B2
公开(公告)日：2016-03-01
申请号：US14571168
申请日：2014-12-15
申请人： KYOCERA Document Solutions Inc.
发明人： Yasuhiro Oishi , Yuji Kamiyama , Akihiro Watanabe , Tamotsu Shimizu , Yoshinobu Yoneima , Shizuka Okada , Sakae Saito
IPC分类号： G03G15/08 , G03G15/09
CPC分类号： G03G15/0818 , G03G15/09
摘要： A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. In the roller main body, a boehmite layer has been formed on an outer circumferential surface of a base body that is made of a metal including aluminum, by a surface treatment by a boehmite method, and a resin coat layer has been formed on a surface of the boehmite layer, the resin coat layer being made of a resin material having electric conductivity.
摘要翻译：显影辊包括辊状主体，其被设置为面对而不接触图像载体的外周表面。在辊主体中，通过用勃姆石法进行表面处理，在由铝构成的金属的基体的外周面上形成勃姆石层，在表面上形成树脂涂层的勃姆石层，树脂涂层由具有导电性的树脂材料制成。

10. 发明授权

US09217951B2 Image forming apparatus with leakage detecting unit for detecting leakage 有权
标题翻译：具有泄漏检测单元的图像形成装置，用于检测泄漏
公开(公告)号：US09217951B2
公开(公告)日：2015-12-22
申请号：US14643578
申请日：2015-03-10
申请人： KYOCERA Document Solutions Inc.
发明人： Masashi Fujishima , Yoshinobu Yoneima , Tamotsu Shimizu
IPC分类号： G03G15/08 , G03G15/06 , G03G15/09
CPC分类号： G03G15/065 , G03G15/0907
摘要： An image forming apparatus includes an image carrier, a developing device, a bias applying unit, a leakage detecting unit, a bias control unit and a leakage detection control unit. The developing device includes a magnetic roller and a developing roller. The magnetic roller carries a developer layer by being rotated. The developing roller receives the toner from the developer layer and supplies the toner to the image carrier. The leakage detection control unit performs a leakage detecting operation of detecting a value of an inter-peak voltage, at which the leakage occurred. The leakage detection control unit simultaneously starts the leakage detecting operation for a plurality of developing devices and performs the leakage detecting operations of the developing devices in which leakage simultaneously occurred while switching the leakage detecting operations one by one if the leakage simultaneously occurs in a plurality of developing devices at an inter-peak voltage.
摘要翻译：图像形成装置包括图像载体，显影装置，偏压施加单元，泄漏检测单元，偏置控制单元和泄漏检测控制单元。显影装置包括磁辊和显影辊。磁性辊通过旋转承载显影剂层。显影辊从显影剂层接收调色剂并将调色剂供应到图像载体。泄漏检测控制单元执行检测发生泄漏的峰间电压的值的泄漏检测操作。泄漏检测控制单元同时开始多个显影装置的泄漏检测操作，并且如果在多个显影装置中同时发生泄漏的同时一次一个地切换泄漏检测操作，则同时进行泄漏同时发生的显影装置的泄漏检测操作以峰间电压开发器件。

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