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公开(公告)号：US12007712B2
公开(公告)日：2024-06-11
申请号：US18332143
申请日：2023-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Junichi Nakagawa , Tamotsu Shimizu , Hiroshi Yamazaki , Kenichi Tamaki , Takuji Watanabe
CPC classification number: G03G21/0052 , G03G7/0013 , G03G15/0808 , G03G15/081 , G03G15/0889 , G03G21/206 , G03G2215/085 , G03G2221/0021
Abstract: Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. An absolute value of a perpendicular-magnetic-force gradient of a fixed magnet of the developer carrying member is 4.0 mT/° or less at a position where the fixed magnet faces a central portion of the filter in a rotation direction of a developing sleeve.
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公开(公告)号：US12001152B2
公开(公告)日：2024-06-04
申请号：US18147207
申请日：2022-12-28
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kenichi Tamaki
IPC: G03G15/08
CPC classification number: G03G15/0848
Abstract: A processor causes a printing portion to execute test image transfer processing for transferring a plurality of test toner images onto an area outside a secondary transfer area on a surface of an intermediate transfer member, and secondary voltage stop processing for stopping a supply of a secondary transfer voltage. The processor acquires a plurality of first sensing densities. The processor causes the printing portion to execute the test image transfer processing and secondary voltage supply processing for supplying the secondary transfer voltage. The processor acquires a plurality of second sensing densities. The processor compares the plurality of first sensing densities and the plurality of second sensing densities to determine a state of a toner charging amount in each of the plurality of test toner images.
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公开(公告)号：US10175608B2
公开(公告)日：2019-01-08
申请号：US15457063
申请日：2017-03-13
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kenichi Tamaki , Tamotsu Shimizu , Akifumi Yamaguchi
Abstract: A developing device includes a developing roller, a conveyor roller and a developer stirring unit. The developing roller is arranged to face a photoconductive drum at a predetermined developing position. The developing roller includes a fixed first magnet and a first sleeve. The conveyor roller is arranged to face the developing roller at a predetermined facing position. The conveyor roller includes a fixed second magnet and a second sleeve. The developer stirring unit stirs the developer and supplies the developer to the conveyor roller. The first magnet includes a first magnetic pole composed of a predetermined magnetic pole and a second magnetic pole arranged downstream of and adjacent to the first magnetic pole and having the same polarity as the first magnetic pole. The developer is transferred from the developing roller to the conveyor roller after passing through a repulsive magnetic field formed by the first and second magnetic poles.
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公开(公告)号：US09846389B2
公开(公告)日：2017-12-19
申请号：US15299199
申请日：2016-10-20
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kenichi Tamaki
IPC: G03G15/08
CPC classification number: G03G15/0891 , G03G15/0893
Abstract: An image forming apparatus includes a developing portion, a first rotation control portion, and a second rotation control portion. The developing portion has a conveying member configured to convey a developer within a circulation-conveyance passage, and a reducing portion provided in the conveying member and configured to reduce an ability to convey the developer. The first rotation control portion is configured to rotate the conveying member at a predetermined first speed when a printing process is executed. The second rotation control portion is configured to suspend execution of the printing process and rotate the conveying member at a second speed lower than the first speed, when an average coverage rate per page of a printed matter having a predetermined reference number of consecutively printed pages exceeds a predetermined threshold.
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公开(公告)号：US20170269509A1
公开(公告)日：2017-09-21
申请号：US15456965
申请日：2017-03-13
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu Shimizu , Kenichi Tamaki
IPC: G03G15/09
CPC classification number: G03G15/0889 , G03G15/0808 , G03G15/0812 , G03G15/0907 , G03G15/0921
Abstract: A developing device includes a developing roller and a conveyor roller. The developing roller includes a first magnet. The conveyor roller includes a second magnet. The first magnet includes a first magnetic pole and a second magnetic pole. The second magnet includes a third magnetic pole and a fourth magnetic pole. The first and fourth magnetic poles are magnetic poles having the same polarity. One of the second and third magnetic poles is a magnetic pole having the same polarity as the first magnetic pole. The other of the second and third magnetic poles is a magnetic pole having a polarity different from the first magnetic pole. The developer is transferred from the conveyor roller to the developing roller by the third and second magnetic poles. The developer is transferred from the developing roller to the conveyor roller by the first and fourth magnetic poles.
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Patent Agency Ranking
公开(公告)号：US09235162B2
公开(公告)日：2016-01-12
申请号：US14090268
申请日：2013-11-26
Applicant: KYOCERA Document Solutions Inc.
Inventor： Ikuo Makie , Kenichi Tamaki , Minoru Wada , Shizuka Okada , Tamotsu Shimizu
IPC: G03G15/08
CPC classification number: G03G15/0879 , G03G2215/0827 , G03G2215/083 , G03G2215/0833
Abstract: A developer storage container includes a container main body, a tubular portion projecting from the container main body, and a rotary member extending from the container main body to the tubular portion. The rotary member includes a first section located in the container main body and a second section located in the tubular portion. A first conveying member for conveying developer in a first conveying direction is arranged on the second section of a rotary shaft, and a second conveying member for conveying the developer in a second conveying direction is arranged radially outwardly of the first conveying member around the first section. A first flexible member radially extending to a side outward of the second conveying member and a second flexible member radially extending to a side outward of the second conveying member and having a shorter length than the first flexible member are mounted on the rotary shaft.
Abstract translation: 显影剂储存容器包括容器主体，从容器主体突出的管状部分和从容器主体延伸到管状部分的旋转部件。 旋转构件包括位于容器主体中的第一部分和位于管状部分中的第二部分。 用于在第一输送方向上输送显影剂的第一输送构件设置在旋转轴的第二部分上，并且用于沿第二输送方向输送显影剂的第二输送构件围绕第一部分径向向外设置在第一输送构件的外侧 。 径向延伸到第二输送构件外侧的第一柔性构件和径向延伸到第二输送构件的外侧并具有比第一柔性构件更短的长度的第二柔性构件安装在旋转轴上。
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公开(公告)号：US20140233985A1
公开(公告)日：2014-08-21
申请号：US14180793
申请日：2014-02-14
Applicant: KYOCERA Document Solutions Inc.
Inventor： Minoru Wada , Takahisa Nakaue , Tamotsu Shimizu , Ikuo Makie , Kenichi Tamaki , Takefumi Yotsutsuji , Shizuka Okada
IPC: G03G15/08
CPC classification number: G03G15/0921 , G03G15/0865 , G03G2215/0838
Abstract: A developing device includes: a housing, a refill developer storage part, a developing roller, a developer conveyance path, a developer receiving port, a conveyance member, and a magnetic member. The developing roller is driven into rotation in the developing housing and carries a toner on a circumferential surface thereof. The toner is conveyed inside the first conveyance path and the second conveyance path of the developing housing in a circulating manner. A first stirring screw is disposed on the first conveyance path and conveys the toner in a first direction. Downstream of the toner refill port, a magnet is arranged. The magnetic member forms a magnetic blush from a top panel of the developing housing towards the first stirring screw. A refill toner flowed-in through the toner refill port is so conveyed as to fall below the magnetic blush whereby the refill toner is favorably stirred with a surrounding toner.
Abstract translation: 显影装置包括：外壳，再充填显影剂储存部分，显影辊，显影剂输送路径，显影剂接收口，输送部件和磁性部件。 显影辊在显影壳体中被驱动旋转并在其圆周表面上承载调色剂。 调色剂以循环的方式在显影箱的第一输送路径和第二输送路径内传送。 第一搅拌螺杆设置在第一输送路径上并沿着第一方向输送调色剂。 在调色剂补充口的下游配置有磁铁。 磁性构件从显影壳体的顶板朝向第一搅拌螺杆形成磁腮红。 通过调色剂填充口流入的补充调色剂被输送以便落在磁腮红之下，由此再充填调色剂与周围的调色剂有利地搅拌。
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公开(公告)号：US12078958B2
公开(公告)日：2024-09-03
申请号：US18332249
申请日：2023-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Hiroshi Yamazaki , Junichi Nakagawa , Tamotsu Shimizu , Kenichi Tamaki , Takuji Watanabe
IPC: G03G21/20
CPC classification number: G03G21/206
Abstract: Provided is an image forming apparatus that is capable of carrying out a scattered-toner recovery mode in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. A fixed magnet of the developer carrying member has a first pole that faces the image bearing member, a second pole that faces the filter, and an intermediate pole between the first pole and the second pole.
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公开(公告)号：US11977351B2
公开(公告)日：2024-05-07
申请号：US18331704
申请日：2023-06-08
Applicant: KYOCERA Document Solutions Inc.
Inventor： Takuji Watanabe , Junichi Nakagawa , Kenichi Tamaki , Hiroshi Yamazaki , Tamotsu Shimizu
CPC classification number: G03G21/206 , G03G15/0266 , G03G15/065 , G03G15/09 , G03G21/0047 , G03G21/0052 , G03G21/10 , G03G21/105 , G03G21/1814 , G03G2215/00025 , G03G2221/1645
Abstract: An image forming apparatus includes a development device, and a control unit that controls the development device. The development device includes a toner collection mechanism having a duct, a filter, and an exhaust fan. The duct is connected to a conveyance chamber of the development container and allows air in the conveyance chamber to flow through. The filter is disposed at a connecting part between the duct and the conveyance chamber, and collects toner flowing into the duct from the conveyance chamber. The exhaust fan makes the air in the conveyance chamber flow to the outside via the duct. The control unit changes rotational frequency or operation frequency of the exhaust fan based on current detected by a current detection unit at non-image forming time.
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公开(公告)号：US20210263441A1
公开(公告)日：2021-08-26
申请号：US17178548
申请日：2021-02-18
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Kanako Morimoto , Kazunori Tanaka , Kenichi Tamaki
Abstract: An image forming apparatus includes a plurality of image forming units, a developing voltage power supply, a density detection device, a current detection unit, and a control unit. The plurality of image forming units form an image and substantially same development conditions are set to evenly divide an image density among the image forming units. The control unit detects whether there is an anomaly in a developing device, based on a toner charge amount calculated based on a DC component of developing current when a reference image is formed on an image carrier by each of the developing devices and a density of the reference image. When an anomaly is detected in any of the developing devices, the control unit inhibits use of the image forming unit including the developing device, and resets the development conditions to evenly divide the image density among the usable image forming units.
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