公开(公告)号：US20240361724A1

公开(公告)日：2024-10-31

申请号：US18646436

申请日：2024-04-25

申请人： CANON KABUSHIKI KAISHA

发明人： CHIHARU AKIYAMA ,  KANAME WATARIGUCHI ,  TSUTOMU NISHIDA

IPC分类号： G03G21/18 ,  G03G5/147

CPC分类号： G03G21/1814 ,  G03G5/14752 ,  G03G21/1857 ,  G03G2215/00957 ,  G03G2215/00962

摘要： Provided is a process cartridge being detachably attachable onto a main body of an electrophotographic apparatus. The process cartridge includes an electrophotographic photosensitive member, a developing roller, and a toner-supplying roller. The developing roller and the toner-supplying roller are rotated so as to satisfy a particular velocity ratio so that the surface of the developing roller and the surface of the toner-supplying roller are opposite to each other at a contact position therebetween. The surface of the developing roller is a surface of an elastic layer, and the toner-supplying roller includes a shaft body and a resin layer formed on an outer peripheral surface of the shaft body. The electrophotographic photosensitive member includes a surface layer containing a polyarylate resin including a structural unit represented by the following formula (A1) and a structural unit represented by the following formula (A2).

公开(公告)号：US20240353792A1

公开(公告)日：2024-10-24

申请号：US18636961

申请日：2024-04-16

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Jun AZUMA ,  Keiji MARUO ,  Kazuaki EZURE ,  Yuichi YOSHIDA ,  Kazutaka SUGIMOTO ,  Yasuhiro OISHI ,  Kazunari HAMASAKI

IPC分类号： G03G21/18 ,  G03G5/14 ,  G03G7/00 ,  G03G15/095

CPC分类号： G03G21/1814 ,  G03G5/142 ,  G03G7/0053 ,  G03G15/095 ,  G03G2215/00957

摘要： An electrophotographic photosensitive member includes a conductive substrate, an intermediate layer provided on the conductive substrate, and a photosensitive layer provided on the intermediate layer. The intermediate layer contains a specific polyamide resin and specific inorganic particles. The specific inorganic particles each include a metal oxide particle and a surface treatment layer covering at least a part of the surface of the metal oxide particle. The surface treatment layers contain a component derived from an organic siloxane compound and at least one of aluminum oxide and silica. The specific polyamide resin includes a first repeating unit derived from an aliphatic dicarboxylic acid with a carbon number of at least 8 and no greater than 20 and a second repeating unit derived from a diamine compound with a cycloalkane structure.

公开(公告)号：US20240301236A1

公开(公告)日：2024-09-12

申请号：US18587002

申请日：2024-02-26

申请人： CANON KABUSHIKI KAISHA

发明人： ATSUSHI NOGUCHI ,  MINORU NAKAMURA ,  YOSHITAKA SUZUMURA ,  SOUYA YAMANE

IPC分类号： C09D175/04 ,  C08G18/10 ,  C08G18/44 ,  C08G18/48 ,  C08G18/50 ,  C08G18/76 ,  G03G15/02 ,  G03G21/18

CPC分类号： C09D175/04 ,  C08G18/10 ,  C08G18/44 ,  C08G18/4854 ,  C08G18/5024 ,  C08G18/7621 ,  C08G18/7671 ,  G03G15/0291 ,  G03G21/1814 ,  G03G2215/00957 ,  G03G2215/00962

摘要： An electrophotographic roller comprising a substrate comprising a conductive outer surface and a resin layer on the outer surface of the substrate, wherein the resin layer comprises a polyurethane having a polycarbonate structure, an impedance at a frequency of 1.0×100 to 1.0×101 Hz is 1.00×106Ω or more when a specific AC voltage is applied to the outer surface of the electrophotographic roller while a frequency is changed between specific range, and when a corona discharger having a grid part is moved along an axial direction of the electrophotographic roller at a speed of 400 mm/sec, a maximum value of an electric potential of the outer surface is less than 20.0 V when measured at 0.06 seconds after a passage of the grid part.

公开(公告)号：US20190094724A1

公开(公告)日：2019-03-28

申请号：US15946312

申请日：2018-04-05

申请人： FUJI XEROX CO., LTD.

发明人： Eri KUNISAWA

IPC分类号： G03G5/06 ,  G03G5/05

CPC分类号： G03G5/0696 ,  G03G5/0514 ,  G03G5/0525 ,  G03G5/0542 ,  G03G5/0564 ,  G03G5/06 ,  G03G5/0614 ,  G03G2215/00957

摘要： An electrophotographic photoreceptor includes a conductive substrate, a charge-generating layer disposed on the conductive substrate, and a charge-transporting layer as an outermost layer disposed on the charge-generating layer and containing a binder resin and a charge-transporting material, wherein the average particle size of the crystal of the charge-transporting material is approximately from 0.1 μm to 5.0 μm.

公开(公告)号：US20180217512A1

公开(公告)日：2018-08-02

申请号：US15128801

申请日：2015-12-07

申请人： KYOCERA Document Solutions Inc.

发明人： Maki IKE ,  Ai TAKAGAMI ,  Masaki KADOTA ,  Takahiko MURATA ,  Hisashi MUKATAKA

IPC分类号： G03G5/08 ,  G03G5/10

CPC分类号： G03G5/08 ,  G03G5/04 ,  G03G5/08221 ,  G03G5/102 ,  G03G5/104 ,  G03G2215/00957

摘要： This electrophotographic photosensitive body (20) comprises a supporting body (20a) and a photosensitive layer (20b) that is formed on the surface of the supporting body (20a). The surface of the photosensitive layer (20b) has an arithmetic mean roughness Ra within the range of from 20 nm to 100 nm (inclusive), a ten-point average roughness Rz within the range of from 0.2 μm to 1.0 μm (inclusive) and a mean spacing of profile irregularities Sm of 20 μm or less in the initial stage of use.

公开(公告)号：US10001715B2

公开(公告)日：2018-06-19

申请号：US15110166

申请日：2015-01-16

申请人： Namhyuk Cho

发明人： Namhyuk Cho

IPC分类号： G03G5/00 ,  G03G5/05 ,  G03G5/06

CPC分类号： G03G5/0525 ,  G03G5/05 ,  G03G5/06 ,  G03G2215/00957

摘要： Disclosed is a method for manufacturing an organic photosensitive drum for electrophotography, which includes a step of immersing a hollow cylinder into a liquefied photosensitive material after gripping the hollow cylinder, by using a coating device including: a transfer tray in which the hollow cylinder is inserted and loaded into at least one jig vertically provided on a plate type pallet; and a gripping assembly disposed above the transfer tray and including at least one gripping mechanism. The process of gripping the hollow cylinder includes: inserting a portion or the whole of the gripping mechanism into the hollow cylinder; aligning a lower end of the gripping mechanism with a lower end of the hollow cylinder; and gripping the hollow cylinder by using the gripping mechanism.

公开(公告)号：US20170343908A1

公开(公告)日：2017-11-30

申请号：US15590047

申请日：2017-05-09

申请人： Ryohta TAKAHASHI ,  Akihiro SUGINO ,  Eiji KURIMOTO ,  Hidetoshi KAMI ,  Keisuke SHIMOYAMA ,  Tetsuro SUZUKI ,  Tomoharu ASANO ,  Toshihiro ISHIDA

发明人： Ryohta TAKAHASHI ,  Akihiro SUGINO ,  Eiji KURIMOTO ,  Hidetoshi KAMI ,  Keisuke SHIMOYAMA ,  Tetsuro SUZUKI ,  Tomoharu ASANO ,  Toshihiro ISHIDA

IPC分类号： G03G5/05 ,  G03G5/147 ,  G03G15/20 ,  G03G15/01

CPC分类号： G03G5/051 ,  G03G5/0517 ,  G03G5/0521 ,  G03G5/0631 ,  G03G5/142 ,  G03G5/144 ,  G03G5/14708 ,  G03G15/01 ,  G03G15/20 ,  G03G2215/00957

摘要： A photoconductor is provided. The photoconductor includes a support, an undercoat layer overlying the support, and a photosensitive layer overlying the undercoat layer. The undercoat layer includes a binder resin and a zinc oxide particle. The photosensitive layer includes a compound represented by the following formula (1): where each of R1 and R2 independently represents an alkyl group or an aromatic hydrocarbon group.

公开(公告)号：US09829813B2

公开(公告)日：2017-11-28

申请号：US15175343

申请日：2016-06-07

申请人： FUJI XEROX CO., LTD.

发明人： Katsumi Nukada ,  Wataru Yamada ,  Takatsugu Doi ,  Yuko Iwadate

IPC分类号： C08K5/06 ,  G03G21/18 ,  G03G5/147 ,  G03G5/05 ,  C08J3/02

CPC分类号： G03G5/14726 ,  C08J3/02 ,  C08J2300/102 ,  G03G5/0525 ,  G03G5/0539 ,  G03G21/18 ,  G03G2215/00957

摘要： Provided is a fluorine-containing resin particle dispersion including: fluorine-containing resin particles, a resin which is not dissolved in at least one solvent in a group of hydroxyl group-containing solvents including an alcohol-based solvent having 1 to 10 carbon atoms, containing no aromatic ring in the molecule structure, and a water-based medium, and which is adhered on the surface of the fluorine-containing resin particles, and at least one solvent, in which the resin is not dissolved, in the group of hydroxyl group-containing solvents, in which the fluorine-containing resin particles having the resin adhered on the surface thereof are dispersed.

公开(公告)号：US09766561B2

公开(公告)日：2017-09-19

申请号：US15077185

申请日：2016-03-22

申请人： CANON KABUSHIKI KAISHA

发明人： Koji Takahashi ,  Naoaki Ichihashi ,  Tsuyoshi Shimada

IPC分类号： G03G5/00 ,  G03G5/07 ,  G03G5/047 ,  G03G5/05

CPC分类号： G03G5/07 ,  G03G5/047 ,  G03G5/056 ,  G03G5/0564 ,  G03G2215/00957

摘要： The present invention provides an electrophotographic photosensitive member including a support, and a photosensitive layer on the support. The photosensitive layer has a charge generating layer containing a charge generating material and a charge transporting layer containing a charge transporting material, in this order. The charge transporting layer contains (α) a specific polycarbonate resin or a specific polyester resin, (β) the charge transporting material, (γ) a methoxybenzene, and (δ) a methoxybenzene, a methoxycyclohexane or a methylhexanol having a substituent. The content Wδ of the (δ) is 0.001% by mass or more and 1% by mass or less based on the total mass of the charge transporting layer.

公开(公告)号：US09746816B2

公开(公告)日：2017-08-29

申请号：US13033338

申请日：2011-02-23

申请人： Tadashi Mizushima ,  Akiteru Fujii ,  Takayuki Shoda

发明人： Tadashi Mizushima ,  Akiteru Fujii ,  Takayuki Shoda

IPC分类号： G03G21/00 ,  G03G5/06 ,  G03G5/05 ,  G03G5/04 ,  G03G5/043 ,  G03G5/147 ,  G03G9/08 ,  G03G9/09

CPC分类号： G03G5/047 ,  G03G5/04 ,  G03G5/043 ,  G03G5/0525 ,  G03G5/0542 ,  G03G5/056 ,  G03G5/0567 ,  G03G5/0614 ,  G03G5/0618 ,  G03G5/0629 ,  G03G5/1473 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/0904 ,  G03G9/0906 ,  G03G9/0926 ,  G03G9/09321 ,  G03G9/09364 ,  G03G9/09385 ,  G03G9/09392 ,  G03G21/0005 ,  G03G21/0011 ,  G03G2215/00957 ,  G03G2215/0604

摘要： The invention is to provide an image forming apparatus and an electrophotographic cartridge, which are free from problems of cleaning failure, filming, soiling, residual images (ghosts), fogging, density reduction, noise and the like and which can provide high-definition images even when a toner having a small particle size and having a high degree of circularity is used and even when a photoreceptor having a small outer diameter is used. An image forming apparatus comprising: an electrophotographic photoreceptor containing a conductive support and a photosensitive layer on the conductive support, a charging unit for charging the electrophotographic photoreceptor, an imagewise exposing unit for imagewise exposing the charged electrophotographic photoreceptor to form an electrostatic latent image thereon, a developing unit for developing the electrostatic latent image with a toner, and a transferring unit for transferring the toner from the electrophotographic photoreceptor to a receiving unit, wherein the outer diameter of the electrophotographic photoreceptor is 20 mm or less, the photosensitive layer contains a polyarylate resin, and the toner satisfies the specific requirements (1) and (2).