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公开(公告)号：US20130243492A1
公开(公告)日：2013-09-19
申请号：US13787347
申请日：2013-03-06
Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
Inventor： Tamotsu Shimizu , Takahisa Nakaue , Teruhiko Nagashima , Takashi Morita
IPC: G03G15/08
CPC classification number: G03G15/0879 , G03G15/0886
Abstract: The present application discloses a developing device including a housing having a connection surface to which the container connects. The connection surface is provided with a feed port for feeding the developer. The developing device includes a shutter mechanism configured to selectively open and close the feed port. The shutter mechanism includes a shutter piece, which moves between a closing position for closing the feed port and an opening position for opening the feed port, and a squeezing mechanism, which protrudes from the shutter piece situated in the closing position to squeeze the developer into the housing through the feed port.
Abstract translation: 本申请公开了一种显影装置，其包括具有容器连接的连接表面的壳体。 连接表面设置有用于供给显影剂的进料口。 该显影装置包括配置成选择性地打开和关闭进给口的快门机构。 快门机构包括在关闭进给口的关闭位置和用于打开进给口的打开位置之间移动的挡板，以及从位于关闭位置的挡板突出以挤压显影剂的挤压机构 外壳通过进料口。
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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：US11914312B2
公开(公告)日：2024-02-27
申请号：US17858537
申请日：2022-07-06
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu Shimizu , Yuji Toyota , Yasuhiro Tauchi
CPC classification number: G03G15/0928 , G03G9/1136 , G03G9/1139 , G03G15/0812 , G03G2215/0609
Abstract: A developing device includes a developing container storing a two-component developer containing a magnetic carrier and a toner, a developer carrying member carrying the developer on its outer circumferential surface, and a regulation member arranged to be opposed at a prescribed distance to the developer carrying member. The developer carrying member includes a developing sleeve on which a magnetic brush is formed, and a magnet secured in the developing sleeve and having a plurality of magnetic poles including a regulation pole opposed to the regulation member and a downstream-side magnetic pole arranged downstream of the regulation pole with respect to the rotation direction of the developing sleeve. The magnet is such that the vertical magnetic force gradient [mT/°] has a local minimum value near a position at which the vertical magnetic force is 0 [mT] between the downstream-side surface of the regulation member and the downstream-side magnetic pole.
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公开(公告)号：US11782357B2
公开(公告)日：2023-10-10
申请号：US17859307
申请日：2022-07-07
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu Shimizu , Yuji Toyota , Yasuhiro Tauchi
CPC classification number: G03G15/0812 , G03G15/09
Abstract: A developing device includes a developing container storing a two-component developer, a developer carrying member, and a regulation member. The developer carrying member includes a developing sleeve, and a magnet having a regulation pole opposite the regulation member and a main pole opposite the image carrying member. The regulation member is arranged downstream of the position at which the vertical magnetic force of the regulation pole is 0 [mT] but upstream of a position at which the vertical and horizontal magnetic forces of the regulation pole are equal. Let the horizontal magnetic force gradient at the position at which the horizontal magnetic force of the main pole is 0 [mT] be A and the horizontal magnetic force gradient at the upstream-side surface of the regulation member along the rotation direction of the developing sleeve be B, then |A|>2.45 and |B|
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Patent Agency Ranking
公开(公告)号：US11747747B2
公开(公告)日：2023-09-05
申请号：US17901706
申请日：2022-09-01
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu Shimizu , Yoshihiro Yamagishi , Kazunori Tanaka
IPC: G03G15/06
CPC classification number: G03G15/065
Abstract: An image forming portion applies a bias voltage in which an AC component is superimposed on a DC component between a first carrying member and a second carrying member, and transfers toner from the first carrying member to the second carrying member to form an image on the second carrying member. An AC setting processing portion performs AC calibration to set a magnitude of the AC component of the bias voltage. A potential measurement processing portion measures a surface potential of the first carrying member or the second carrying member based on a target current flowing between the first carrying member and the second carrying member. A drive processing portion executes the AC calibration before measurement of the surface potential in a case where, when measuring the surface potential, an activation condition is satisfied.
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公开(公告)号：US20230075031A1
公开(公告)日：2023-03-09
申请号：US17901706
申请日：2022-09-01
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu Shimizu , Yoshihiro Yamagishi , Kazunori Tanaka
IPC: G03G15/06
Abstract: An image forming portion applies a bias voltage in which an AC component is superimposed on a DC component between a first carrying member and a second carrying member, and transfers toner from the first carrying member to the second carrying member to form an image on the second carrying member. An AC setting processing portion performs AC calibration to set a magnitude of the AC component of the bias voltage. A potential measurement processing portion measures a surface potential of the first carrying member or the second carrying member based on a target current flowing between the first carrying member and the second carrying member. A drive processing portion executes the AC calibration before measurement of the surface potential in a case where, when measuring the surface potential, an activation condition is satisfied.
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公开(公告)号：US11573501B2
公开(公告)日：2023-02-07
申请号：US17474508
申请日：2021-09-14
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yoshihiro Yamagishi , Tamotsu Shimizu , Kazunori Tanaka
Abstract: An image forming apparatus includes an image carrier, a charging device, a developing device, a transfer device, a development power supply, a current measurement device, and a processor. The development power supply applies a predetermined bias voltage to the developing device. The processor functions as a calculator and a controller. The calculator calculates a surface potential of the image carrier based on the development current measured by the current measurement device. The controller controls the charging device, the developing device, the transfer device, and the development power supply. The controller sets a tentative transfer current to be flowed through the transfer device while the calculator calculates the surface potential.
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公开(公告)号：US20210200112A1
公开(公告)日：2021-07-01
申请号：US17126127
申请日：2020-12-18
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kanako Morimoto , Tamotsu Shimizu , Kazunori Tanaka , Hiroka Itani
Abstract: According to one embodiment, an image forming apparatus includes an image forming portion, and a control portion. The image forming portion includes an image carrier, a charging device, and a cleaning device. The charging device includes a charging roller which contacts a surface of the image carrier. The cleaning device includes a cleaning blade, and an adjustment portion. The cleaning blade slidably contacts the surface of the image carrier. The adjustment portion adjusts a linear pressure of the cleaning blade exerted on the surface of the image carrier. The control portion executes, when a rate of increase of an outer layer resistance value of the charging roller caused by a decrease in the function of the cleaning blade is greater than or equal to a first rate, linear pressure adjustment control of controlling the adjustment portion to increase the linear pressure of the cleaning blade.
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公开(公告)号：US10775727B2
公开(公告)日：2020-09-15
申请号：US16424816
申请日：2019-05-29
Applicant: KYOCERA Document Solutions Inc.
Inventor： Akifumi Yamaguchi , Koji Suenami , Yasushi Imanishi , Tamotsu Shimizu
IPC: G03G15/00
Abstract: An image forming apparatus includes a storage unit and a charging amount acquisition unit. The charging amount acquisition unit performs a charging amount acquisition operation for forming a measurement toner image on the image carrier while changing the frequency of the alternating current voltage of the development bias with a potential difference in a direct current voltage between the developing roller and the image carrier being kept constant, acquiring 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, and acquiring the charging amount of the toner based on the acquired tilt of the measurement straight line and the reference information in the storage unit.
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