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公开(公告)号：US11150578B2
公开(公告)日：2021-10-19
申请号：US16995574
申请日：2020-08-17
Applicant: KYOCERA Document Solutions Inc.
Inventor： Minoru Wada , Yuji Kamiyama , Ikuo Makie , Yu Sasaki , Yukari Ota , Ryo Yamada
Abstract: A developing device includes a developing container, a first stirring member and a second stirring member, and a developing roller. The developing container includes a first stirring chamber, a second stirring chamber, and a communication portion. The first stirring member includes a reverse spiral vane that conveys a developer in a direction reverse to a circulation direction. An air discharge duct is formed on a wall portion of the first stirring chamber opposed to the reverse spiral vane and in an area excluding the communication portion and discharges air from the first stirring chamber to an outside of the developing container via an air discharge port at a distal end of the air discharge duct. A filtration portion is disposed in the air discharge duct adjacently to the air discharge port and restricts leakage of the developer through the air discharge port.
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公开(公告)号：US09639024B2
公开(公告)日：2017-05-02
申请号：US15227540
申请日：2016-08-03
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yasuhiro Tauchi , Yukari Ota , Shinji Otani , Takashi Somete , Yoshimi Shimizu
CPC classification number: G03G15/0812 , G03G15/081 , G03G15/0815 , G03G15/09
Abstract: A developing device of the present disclosure includes a developing roller, a toner supplying roller, a regulation blade, a casing, a toner receiver support member, a toner receiver member, and a vibration generator. The toner receiver support member is disposed inside the casing so as to face the developing roller or the toner supplying roller between the regulation blade and an image carrier. The toner receiver member is disposed along a longitudinal direction of the toner receiver support member, and has a toner receiving surface that receives toner falling from the developing roller. The vibration generator vibrates the toner receiver member. At each end part of the toner receiving surface in its longitudinal direction, there is formed a thin-walled portion that is thinner in thickness than other parts of the toner receiving surface.
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公开(公告)号：US11366403B2
公开(公告)日：2022-06-21
申请号：US17486111
申请日：2021-09-27
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yukari Ota , Masahito Ishino , Takahisa Nakaue , Tomohiro Tamaki , Kotatsu Kawaguchi
Abstract: An image forming apparatus includes an image carrier, a charger, an exposure device, a development device and a pressing mechanism. When a developer carrier and the image carrier are rotated in a state where a film is held in a development nip area and then a pulling force of the film is measured, a maximum value MAX, a minimum value MIN, and an average value X of the pulling force satisfy the expressions (1) and (2). When a development voltage applied to the developer carrier is set to Vdc, the surface potential of the image carrier is set to V0, and the surface potential of the image carrier after exposure is set to VL, the expressions (3) and (4) are satisfied. X≤MAX≤1.5X (1), 0.5X≤MIN≤X (2), V0−Vdc≥2(Vdc−VL) (3) and Vdc−VL≥100 (4).
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公开(公告)号：US20220107581A1
公开(公告)日：2022-04-07
申请号：US17449068
申请日：2021-09-27
Applicant: KYOCERA Document Solutions Inc.
Inventor： Minoru Wada , Masahito Ishino , Takahisa Nakaue , Yukari Ota , Tomohiro Tamaki
Abstract: An image forming apparatus includes an image-carrying member, a charging device, an exposure device, and a developing device. The charging device charges a surface of the image-carrying member. The exposure device writes an electrostatic latent image on the surface of the image-carrying member by exposing the charged surface of the image-carrying member. The developing device includes a developing roller and a bias output circuit. The bias output circuit applies a developing bias to the developing roller. A potential VH of a non-exposure portion charged on the surface of the image-carrying member, a potential VL of an exposure portion on the surface of the image-carrying member, and the developing bias VDD meet a relationship of VH−VDD≥2 (VDD−VL). In addition, a difference between the developing bias VDD and the potential VL of the exposure portion (VDD−VL) is 100 V or more.
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公开(公告)号：US11340537B2
公开(公告)日：2022-05-24
申请号：US17373245
申请日：2021-07-12
Applicant: KYOCERA Document Solutions Inc.
Inventor： Masahito Ishino , Kotatsu Kawaguchi , Takahisa Nakaue , Yukari Ota , Tomohiro Tamaki
IPC: G03G15/08
Abstract: A development device includes a development housing, a development roller, a supply roller and a layer thickness regulating member. The development housing stores a nonmagnetic one-component toner. The development roller is formed by a cylindrical elastic body, and moves in a same direction as a rotational direction of a rotatable photosensitive drum at a development nip area while coming into contact with the photosensitive drum. The supply roller is formed by a cylindrical elastic body, and supplies the toner to the development roller and collects the toner from the development roller. The development roller has a surface free energy within a range of 5 mJ/m2 or more and 27 mJ/m2 or less.
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Patent Agency Ranking
6.发明授权公开(公告)号：US09541861B2
公开(公告)日：2017-01-10
申请号：US15098229
申请日：2016-04-13
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yasuhiro Tauchi , Yukari Ota
CPC classification number: G03G15/0877 , G03G15/065 , G03G15/0808 , G03G15/0812
Abstract: A developing device includes a toner carrying member, a developer carrying member, a layer thickness restricting portion, a rotation control portion, and a developer carrying member difference voltage control portion. The rotation control portion, when developing is not performed, causes the developer carrying member to rotate forwardly and then to rotate reversely. The developer carrying member difference voltage control portion, in the non-developing forward rotation state, sets a voltage of the developer carrying member that is based on a potential of the toner carrying member, to a voltage that is smaller than a first reference voltage that is set when the developing is performed. The non-developing forward rotation state is a state in which the developer carrying member rotates forwardly when the developing is not performed.
Abstract translation: 显影装置包括调色剂承载构件，显影剂承载构件，层厚度限制部分，旋转控制部分和显影剂承载构件差异电压控制部分。 旋转控制部在不进行显影时，使显影剂承载构件向前旋转，然后反转。 显影剂承载构件差动电压控制部分处于非显影正向旋转状态，将基于调色剂承载构件的电位的显影剂承载构件的电压设定为小于第一参考电压的电压， 在显影时进行设定。 非显影正向旋转状态是当不进行显影时，显影剂承载构件向前旋转的状态。
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公开(公告)号：US11467513B2
公开(公告)日：2022-10-11
申请号：US17486021
申请日：2021-09-27
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomohiro Tamaki , Takahisa Nakaue , Kotatsu Kawaguchi , Masahito Ishino , Yukari Ota
Abstract: An image forming apparatus includes an image carrier, a charger, an exposure device, a development device and a pressing mechanism. The developer carrier is pressed on the image carrier with a predetermined pressing force to form a nip area between the roller part and the image carrier. A roller part of the developer carrier has an Asker C hardness of 65° or more and 73° or less. When the pressing force is set to X (N) and a width of the nip area in a circumferential direction of the image carrier is set to Y (μm), 3.0≤X≤8.0 and 550≤Y≤700, and the following expressions (1) and (2) are satisfied, Y ≥ 31. X + 393.2 and , ( 1 ) Y ≤ 47. X + 450.1 . ( 2 )
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公开(公告)号：US10120301B1
公开(公告)日：2018-11-06
申请号：US15941963
申请日：2018-03-30
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yukari Ota
IPC: G03G15/08
CPC classification number: G03G15/0893 , G03G15/0889 , G03G2215/0819
Abstract: A developing device of the present disclosure includes a developing container, a first stirring-conveyance member, a second stirring-conveyance member, and a developer carrier. The developing container includes a first conveyance chamber, and a second conveyance chamber arranged above the first conveyance chamber. The first stirring-conveyance member conveys a developer in the first conveyance chamber in a first direction, while stirring the developer. The second stirring-conveyance member conveys the developer in the second conveyance chamber in a second direction, while stirring the developer. The first stirring-conveyance member includes a plurality of spiral blades formed on an outer peripheral surface of a rotary shaft, and a reverse spiral blade which is arranged downstream of the spiral blades in the first direction and opposite in winding direction to the spiral blades. Downstream ends of the spiral blades in the first direction are located substantially equally distant from the reverse spiral blade.
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公开(公告)号：US10073373B2
公开(公告)日：2018-09-11
申请号：US15646355
申请日：2017-07-11
Applicant: Kyocera Document Solutions Inc.
Inventor： Yoshimi Shimizu , Yukari Ota
IPC: G03G15/06
CPC classification number: G03G15/065 , G03G15/5058 , G03G2215/0164
Abstract: An image forming apparatus includes a photoreceptor, an exposure unit, a developing unit, and a control unit. The control unit sets the toner-layer-forming electric potential difference lower than an electric potential when forming the image on the print medium, forms a combined patch for calibration by the set toner-layer-forming electric potential difference for calibration, so as to adjust the developing-bias potential by measuring a print density of the formed combined patch. The combined patch includes a first patch and a plurality of second patches. The plurality of second patches have a width within a range of 0.2 mm to the predetermined value in the peripheral-velocity direction of the photoreceptor, extend with a length equal to or more than the predetermined value in the rotation-shaft direction of the photoreceptor, and are arranged at a predetermined interval in the peripheral-velocity direction of the photoreceptor.
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公开(公告)号：US20180011417A1
公开(公告)日：2018-01-11
申请号：US15646355
申请日：2017-07-11
Applicant: Kyocera Document Solutions Inc.
Inventor： Yoshimi Shimizu , Yukari Ota
IPC: G03G15/06
CPC classification number: G03G15/065 , G03G15/5058 , G03G2215/0164
Abstract: An image forming apparatus includes a photoreceptor, an exposure unit, a developing unit, and a control unit. The control unit sets the toner-layer-forming electric potential difference lower than an electric potential when forming the image on the print medium, forms a combined patch for calibration by the set toner-layer-forming electric potential difference for calibration, so as to adjust the developing-bias potential by measuring a print density of the formed combined patch. The combined patch includes a first patch and a plurality of second patches. The plurality of second patches have a width within a range of 0.2 mm to the predetermined value in the peripheral-velocity direction of the photoreceptor, extend with a length equal to or more than the predetermined value in the rotation-shaft direction of the photoreceptor, and are arranged at a predetermined interval in the peripheral-velocity direction of the photoreceptor.
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