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公开(公告)号：US11860565B2
公开(公告)日：2024-01-02
申请号：US17848276
申请日：2022-06-23
发明人： Issei Imamura , Ryohei Tsutsumi , Yuichiro Hirata , Takuya Oka
CPC分类号： G03G21/0029 , G03G21/1647 , G03G21/1814 , G03G21/1839 , G03G15/0812
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：US20230418218A1
公开(公告)日：2023-12-28
申请号：US18464885
申请日：2023-09-11
发明人： Masao Uyama , Kenji Matsuda , Ken Kikuchi
CPC分类号： G03G21/1814 , G03G15/0896 , G03G15/0806 , G03G21/1652 , G03G21/1817 , G03G21/1821 , G03G21/1825 , G03G2221/1853 , G03G2221/166 , G03G21/1864
摘要： A photosensitive member unit includes a photosensitive member, a transfer roller, a mounting portion capable of mounting a development unit including a development roller, a first gear and a second gear each provided at one end of the photosensitive member in an axial direction of the photosensitive member, and a third gear provided at one end of the transfer roller in an axial direction of the photosensitive member and configured to engage with the second gear. The first gear, the second gear, and the third gear are helical gears. A direction in which helical teeth of the first gear are inclined is opposite to a direction in which helical teeth of the second gear are inclined, and the direction in which the helical teeth of the first gear are inclined matches a direction in which helical teeth of the third gear are inclined.
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公开(公告)号：US20230418215A1
公开(公告)日：2023-12-28
申请号：US18210152
申请日：2023-06-15
发明人： TAKAYUKI YADA , NAOKI MAEDA , YUUKI NAKAMURA
IPC分类号： G03G21/18
CPC分类号： G03G21/1814
摘要： A cartridge is used, which has a receptacle with a replenishment port from which a developer is replenished and which is configured to receive the developer replenished from the replenishment port. The receptacle has a transport region that is located lower than the replenishment port in the direction of gravity, where the received developer is transported in a transport direction. The receptacle is provided with a first filter and a second filter downstream and upstream of the replenishment port respectively in the transport direction. The first filter and second filter restrict passage of the developer while allowing passage of air. The first filter or the second filter is located higher than the transport region in the direction of gravity.
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公开(公告)号：US11853004B2
公开(公告)日：2023-12-26
申请号：US17374673
申请日：2021-07-13
CPC分类号： G03G5/061443 , G03G5/0564 , G03G5/0609 , G03G5/0696 , G03G21/1803
摘要： An electrophotographic photoconductor includes: a conductive substrate; and a single-layer-type photoconductive layer that is provided on the conductive substrate, contains a binder resin, a charge generating material, a hole transporting material, and an electron transporting material, and has an index A represented by the following equation (1) in a range of −7.98 or more and −7.28 or less, Equation (1): A=(0.057×M)−(0.002×F)−(0.252×μ), in which, in the equation (1), M represents a Martens hardness of the single-layer-type photoconductive layer, F represents a Young's modulus of the single-layer-type photoconductive layer, and μ represents an elastic deformation ratio of the single-layer-type photoconductive layer.
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公开(公告)号：US11846909B2
公开(公告)日：2023-12-19
申请号：US17816623
申请日：2022-08-01
发明人： Shougo Sato
CPC分类号： G03G21/1676 , G03G21/1623 , G03G21/1633 , G03G21/1647 , G03G21/1666 , G03G21/18 , G03G2221/163
摘要： An image forming apparatus includes: a main casing; a drum cartridge; and a developing cartridge. The drum cartridge includes a photosensitive drum having a rotational axis. The drum cartridge is drawable from the main casing in a first direction where the axis of the photosensitive drum extends. The developing cartridge is drawable from the main casing in the first direction. The developing cartridge includes: a developing roller; a front wall; and a first developing-device frame. The front wall is disposed at a downstream end of the developing cartridge in the first direction. The front wall has a first hole. The first developing-device frame supports the developing roller. The first developing-device frame includes a first boss extending in the first direction. The first boss goes through the first hole of the front wall.
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公开(公告)号：US11829100B2
公开(公告)日：2023-11-28
申请号：US17464821
申请日：2021-09-02
CPC分类号： G03G21/1814 , G03G21/1821
摘要： [Problem to be solved] To further develop a prior art cartridge.
[Solution] A cartridge includes a holding movable between a first position for stably holding a second unit in a spaced position by a first unit and a second position, and a contact force receiving portion capable of receiving a contact force for moving the holding portion from the first position toward the second position to move the second unit to a developing position, when the second unit is in the spaced position. When a predetermined tangential line is a tangential line of a surface of a photosensitive member at an intersection, which is more remote from a rotational center of a charging member, of intersections between a line connecting a rotational center of the charging member and a rotational center of the photosensitive member and the surface of the photosensitive member, as viewed along a direction of a rotational axis of the developing member, and the cartridge is divided by the predetermined tangential line into sections, a predetermined section is a section in which the rotational center of the charging member does not exist, and as viewed along the rotational axis of the developing member when the second unit is in the spaced position, the contact force receiving portion is in the predetermined section.-
公开(公告)号：US11822286B2
公开(公告)日：2023-11-21
申请号：US17935721
申请日：2022-09-27
发明人： Takashi Kenmoku , Kunihiko Sekido , Kozue Uratani , Koki Inoue , Tatsuya Saeki
CPC分类号： G03G9/09328 , G03G9/0819 , G03G9/0823 , G03G9/0827 , G03G9/09708 , G03G21/1814
摘要： Provided are a process cartridge and an electrophotographic apparatus each capable of suppressing an image defect (coarseness in a halftone image) caused by toner scattering in association with a charging failure that occurs when the process speed of the electrophotographic apparatus is further increased. The process cartridge includes: an electrophotographic photosensitive member; and a developing unit, which includes a toner storing portion that stores a toner, and which supplies the toner to a surface of the electrophotographic photosensitive member. The electrophotographic photosensitive member includes a surface protective layer containing an electroconductive particle in an appropriate amount, and the volume resistivity of the surface protective layer is controlled. As the toner, there is used a toner in which an organosilicon polymer is present on the surface of a toner particle, a silanol group is present in part of the organosilicon polymer, and the amount of the silanol group is controlled.
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公开(公告)号：US11815846B2
公开(公告)日：2023-11-14
申请号：US17674256
申请日：2022-02-17
发明人： Shougo Sato , Yasuo Fukamachi , Motoaki Mushika , Kazuna Taguchi
CPC分类号： G03G21/1842 , G03G15/0896 , G03G21/1814 , G03G21/1821
摘要： An image forming apparatus, including a process cartridge and a main body with an opening and a cartridge supporter is provided. The process cartridge includes a drum cartridge; a toner cartridge attachable to the drum cartridge; and a switching member switchable states in the process cartridge between a first state, wherein detachment of the toner cartridge is restricted, and a second state, wherein the toner cartridge is released from the restriction. The cartridge supporter is movable between a first position, wherein the cartridge supporter supports the process cartridge to be placed entirely in an inner space in the main body on an inner side of the opening, and a second position, wherein the cartridge supporter supports the process cartridge to be at least partly placed outside the inner space. When the cartridge supporter is in the second position, the switching member is at least partly placed outside the inner space.
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公开(公告)号：US11815842B2
公开(公告)日：2023-11-14
申请号：US17484297
申请日：2021-09-24
发明人： Masahiro Ishii , Fumio Morita
CPC分类号： G03G15/80 , G03G15/0865 , G03G15/55 , G03G21/1652 , G03G2221/163 , G03G2221/1823
摘要： A developer cartridge according to one aspect is attachable to a photoconductor unit that comprises a photoconductive drum. The developer cartridge may comprise a main body having an opening, the main body comprising an electric circuit, a front cover configured to move to an opening position in which the opening of the main body is exposed and to a closing position in which the opening of the main body is closed, a first terminal electrically connected to the electric circuit, a photosensitive drum, and a developer cartridge comprising a developing roller, developing frame having a pressed portion, memory unit and second terminal. The front cover may include a pressing portion configured to press the pressed portion of the developing frame in a direction from the developing roller toward the photosensitive drum, and wherein the second terminal faces to the front cover when the front cover is in the closed position.
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公开(公告)号：US11809126B2
公开(公告)日：2023-11-07
申请号：US17582008
申请日：2022-01-24
发明人： Yasuhiko Kinuta , Yuki Tagawa , Ken Ozaki , Noboru Hirakawa
CPC分类号： G03G21/1814 , C08K3/04 , C08L15/02 , G03G5/047 , G03G5/147 , C08K3/013 , C08K2201/001
摘要： A charging member includes a conductive base material; an elastic layer that is provided on the conductive base material and has a storage elastic modulus G of 5.0 MPa or less at 100 Hz; and a surface layer that is provided on the elastic layer, in which in a Cole-Cole plot obtained by measuring the charging member in a range of 1 MHz to 0.1 Hz by an alternating current impedance method, a resistance component Ra of a capacitive semicircle including 2.5 kHz is 6.3×104Ω or less.
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