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公开(公告)号：US20220413425A1
公开(公告)日：2022-12-29
申请号：US17848276
申请日：2022-06-23
发明人： Issei Imamura , Ryohei Tsutsumi , Yuichiro Hirata , Takuya Oka
摘要： A restricting member includes a blade portion and a supporting portion. A contact portion is provided at the blade portion, and, in a cross section orthogonal to a longitudinal direction, the contact portion includes a first portion extending in a first direction and a second portion extending toward a free end from an end of the first portion and extending in a second direction. When a region demarcated by connecting an intersection point, the end of the first portion, and an end of the second portion by a straight line is defined as a first region, the intersection point being where an imaginary line intersects an extension line of the first portion in the first direction, an area of the first region is smaller on a longitudinal end portion than on a longitudinal central portion of the blade portion.
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公开(公告)号：US11022933B2
公开(公告)日：2021-06-01
申请号：US16874833
申请日：2020-05-15
发明人： Kazunori Hashimoto , Katsuhiro Kojima , Toshiaki Takeuchi , Yasukazu Ikami , Kosuke Ikada , Yoshihiro Mitsui , Yuichiro Hirata , Go Shindo , Akinobu Saito , Yuhei Terui , Noriyoshi Umeda , Tomonori Matsunaga , Shohei Kototani , Masamichi Sato
摘要： A process cartridge includes a seal member contacting an image bearing member upstream in the rotation direction of the image bearing member from a cleaning member and allowing the developer to move from upstream in the rotation direction from the contact part between the seal member and the image bearing to downstream from the contact part while regulating movement from downstream to upstream from the contact part. The developer has surface protrusions containing an organic silicon polymer, wherein either (i) the work function of the seal member is greater than the work function of the developer when the developer has a negative charging polarity and is smaller than the work function of the developer when the developer has a positive charging polarity, or (ii) the absolute value of the difference between the work function of the seal member and the work function of the developer is within a predetermined range.
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公开(公告)号：US10719029B2
公开(公告)日：2020-07-21
申请号：US16715444
申请日：2019-12-16
发明人： Yuichiro Hirata , Shinichi Hagiwara
摘要： Provided is an image forming apparatus including an image bearing member, a charging member, an exposing member, a developer carrying member, a storage member to store a first lifetime threshold for the first image forming mode, a second lifetime threshold for the second image forming mode and a value related to a driving amount of the image bearing member. The image forming apparatus further includes a controller to (i) perform a first determination regarding the lifetime corresponding to the first mode based on the value related to the driving amount and the first lifetime threshold and (ii) perform a second determination regarding the lifetime corresponding to the second mode based on the value related to the driving amount and the second lifetime threshold, and a notifying unit to perform a notification based on a result of the first or second determination to the image bearing member.
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公开(公告)号：US20130287452A1
公开(公告)日：2013-10-31
申请号：US13868829
申请日：2013-04-23
IPC分类号： G03G15/08
CPC分类号： G03G21/1817 , G03G15/0806 , G03G15/0808
摘要： In a development device in which a developer containing unit underlies a development chamber, a supplying member in the development chamber forms a nip portion with a developer carrier and the developer carrier and the supplying member rotate in the direction in which their respective surfaces move from an upper end to a lower end of the nip portion.
摘要翻译： 在其中显影剂容纳单元位于显影室下面的显影装置中，显影室中的供应构件形成具有显影剂载体的夹持部分，并且显影剂载体和供给构件沿其各自表面从 上端到压区部分的下端。
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公开(公告)号：US20130287451A1
公开(公告)日：2013-10-31
申请号：US13868594
申请日：2013-04-23
发明人： Shinya Yamamoto , Kodai Hayashi , Hisashi Taniguchi , Naoki Fukushima , Yuichiro Hirata , Nobuyoshi Yoshida
IPC分类号： G03G15/08
CPC分类号： G03G15/0806 , G03G15/0808 , G03G15/5008
摘要： A developing roller configured to develop an electrostatic latent image on a photosensitive drum, a supply roller configured to supply developer to the developing roller are provided, and the surface of the developing roller moves in the same direction as the surface of the photosensitive drum and at a speed higher than the photosensitive drum at a nip portion between the photosensitive drum and the developing roller, the surface of the supply roller moves in the same direction as the surface of the developing roller and at a speed higher than the developing roller at a nip portion between the developing roller and the supply roller.
摘要翻译： 设置成在感光鼓上显影静电潜像的显影辊，提供构造成向显影辊供应显影剂的供应辊，并且显影辊的表面沿与感光鼓的表面相同的方向移动并且在 在感光鼓和显影辊之间的压合部分处的速度高于感光鼓，供应辊的表面在与显影辊的表面相同的方向上以高于显影辊的速度在辊隙处移动 显影辊和供给辊之间的部分。
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公开(公告)号：US11073781B2
公开(公告)日：2021-07-27
申请号：US16905764
申请日：2020-06-18
发明人： Kosuke Ikada , Go Shindo , Keitaro Nakata , Hisashi Yamauchi , Shinichi Agata , Yoshihiro Mitsui , Masahito Kato , Yuichiro Hirata
摘要： An image forming apparatus that executes an image forming operation for forming a toner image on a recording material and an application operation of applying a metal soap to a surface of an image bearing member by supplying a toner stored in a toner storing unit to the surface of the image bearing member from the developing member. A surficial moving speed of the image bearing member during the application operation is lower than the surficial moving speed of the image bearing member during the image forming operation, and a speed difference between the surficial moving speed of the developing member and the surficial moving speed of the image bearing member during the application operation is larger than that during the image forming operation.
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公开(公告)号：US20200004194A1
公开(公告)日：2020-01-02
申请号：US16450107
申请日：2019-06-24
发明人： Bunro Noguchi , Taku Watanabe , Yusaku Iwasawa , Yuichiro Hirata
摘要： An image forming apparatus including a holding apparatus configured to collect residual developer remaining on an intermediate transfer belt and temporarily hold the residual developer, and a cleaning member configured to remove toner borne on the photosensitive drum that moves the toner held by the holding apparatus to the intermediate transfer belt and discharging the toner. Toner from a development roller is supplied to the cleaning member before toner reversely transferred from the intermediate transfer belt is supplied to the cleaning member.
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公开(公告)号：US10481539B2
公开(公告)日：2019-11-19
申请号：US16239923
申请日：2019-01-04
发明人： Yuichiro Hirata , Daisuke Baba
IPC分类号： G03G15/00
摘要： Disclosed is an image forming apparatus that is capable of performing a first image forming mode that performs image formation at a first peripheral speed ratio representing a ratio of a peripheral speed of a developer bearing member to a peripheral speed of an image bearing member and a second image forming mode that performs the image formation at a second peripheral speed ratio different from the first peripheral speed ratio, and that detects an amount of a developer consumed in the image formation, based on an estimate of the amount of the developer consumed by one pixel and the number of pixels at a part at which the developer is consumed. The estimate of the amount of the developer consumed by the one pixel in the first image forming mode is different from that in the second image forming mode.
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公开(公告)号：US20180292778A1
公开(公告)日：2018-10-11
申请号：US16009585
申请日：2018-06-15
发明人： Yuichiro Hirata , Daisuke Baba
IPC分类号： G03G15/00
CPC分类号： G03G15/556
摘要： An image forming apparatus includes an image bearing member, a developer bearing member, an updating device to update toner consumption based on a number of dots corresponding to laser irradiation by which toner is consumed, and an alerting device to alert an alarm concerning a residual amount of the toner based on toner consumption updated by the updating device. Image formation is performed in a first mode at a first peripheral speed ratio representing a ratio of a peripheral speed of the developer bearing member to a peripheral speed of the image bearing member, and in a second mode at a second peripheral speed ratio, which is greater than the first peripheral speed ratio. The alerting device alerts the alarm based on a total number of dots, which is smaller as an operation frequency of the second mode and becomes higher in an operation frequency of the first mode.
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公开(公告)号：US20140348556A1
公开(公告)日：2014-11-27
申请号：US14366660
申请日：2012-12-14
发明人： Daisuke Baba , Makoto Tokudome , Masao Uyama , Yuichiro Hirata , Kodai Hayashi , Keisuke Mochizuki , Norihito Naito
IPC分类号： G03G15/08
CPC分类号： G03G15/081 , G03G15/0812
摘要： A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.
摘要翻译： 构造成显影形成在图像承载部件上的潜像的显影装置包括构造成承载显影剂的可旋转显影剂承载部件，构造成形成存储显影剂的显影剂储存室的显影容器， 设置在显影容器中以调节出现在显影剂承载部件上的显影剂的量的调色剂调节部分，被配置为相对于显影剂调节部分可移动地支撑显影剂承载部件的支撑部分， 被构造成将显影剂承载构件朝向显影剂调节部分加压的构件。 显影剂调节部分与显影剂承载部件的接触部分在加压部件的加压方向的下游侧固定到显影剂容器而不与显影剂容器形成间隙。
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