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    Rubber member for developing roll, and method for manufacturing same
    1.
    发明授权
    Rubber member for developing roll, and method for manufacturing same 有权

    公开(公告)号：US09964890B2

    公开(公告)日：2018-05-08

    申请号：US15300765

    申请日：2015-04-08

    申请人： NOK Corporation ,  Synztec Co., Ltd.

    发明人： Toshihiro Higashira ,  Atsushi Ikeda ,  Tomohiro Kondo

    IPC分类号： G03G15/08 ,  C09D5/00 ,  C09D7/12 ,  C09D175/04 ,  B05D1/02 ,  B05D3/02

    CPC分类号： G03G15/0808 ,  B05D1/02 ,  B05D3/0254 ,  C09D5/00 ,  C09D7/65 ,  C09D7/69 ,  C09D7/70 ,  C09D175/04 ,  G03G15/0818 ,  G03G2215/0863

    摘要： It is an object of the present invention to provide a development roll rubber member that has a uniformly roughened surface on a rubber member surface, that is capable of ensuring a sufficient thickness without contaminating a peripheral portion while maintaining a flexibility in a coating layer and a convex portion without impairing softness of a rubber substrate layer, and that has the coating layer achieving non-tackiness and low friction, and a method of manufacturing the same, and the object is achieved by putting a reactive silicone oil, an isocyanate compound, and a diluent solvent capable of dissolving both the reactive silicone oil and the isocyanate compound into a reaction container, by causing a prepolymerization reaction in which the reactive silicone oil and the isocyanate compound are reacted into a polymerized state in the diluent solvent in the reaction container while dissolution in the solvent is maintained, by subsequently mixing a polyol and an isocyanate compound solution and using silicone rubber particles 101 to prepare an application liquid of a coating layer 13 component, and by applying and curing the application liquid around the development roll 1 for formation.

    Developing roller
    2.
    发明授权
    Developing roller 有权

    公开(公告)号：US10732540B2

    公开(公告)日：2020-08-04

    申请号：US16610448

    申请日：2018-06-12

    申请人： NOK CORPORATION ,  SYNZTEC CO., LTD.

    发明人： Atsushi Ikeda ,  Hiroaki Kaneda ,  Tomohiro Kondo ,  Goki Inukai

    IPC分类号： G03G15/08 ,  C09D7/40 ,  C09D5/00

    摘要： A developing roller having a rubber elastomer layer on the outer periphery of a shaft core metal, having a coating layer formed from a binder (A) and silicone rubber particles (B) on the surface of the rubber elastomer, and having an electrostatic capacitance of 4 to 20 nF; wherein the binder (A) is formed from a diluting solvent solution of a terminal hydroxyl group-containing prepolymer (a) obtained by reaction of an isocyanate compound, an isocyanurate modified product thereof and a reactive silicone oil, and an isocyanate compound and/or an isocyanurate modified product thereof (b). This developing roller suppresses banding by suppressing electrostatic capacitance even if the nip width between the developing roll and the photoreceptor changes due to distortion of peripheral members in the development apparatus, and stick slip (vibration) of gears.

    Fixing pressure roller
    3.
    发明授权
    Fixing pressure roller 有权
    固定压力辊

    公开(公告)号：US09091982B2

    公开(公告)日：2015-07-28

    申请号：US13869552

    申请日：2013-04-24

    申请人： NOK CORPORATION ,  SYNZTEC CO., LTD

    发明人： Shingo Sugiyama ,  Junichi Nakayama ,  Wataru Nemoto ,  Atsushi Ikeda

    IPC分类号： G03G15/20

    CPC分类号： G03G15/2089 ,  G03G15/206 ,  G03G2215/2025 ,  G03G2215/2035

    摘要： The invention provides a fixing pressure roller having an elastic layer formed of a porous material produced from an emulsion, the roller having improved durability. The fixing pressure roller has a core, a rubber layer which has a thickness of 1.0 mm or less and which is provided around the core, and an elastic layer which is formed of a porous elastomer produced from an emulsion composition and which is provided around the rubber layer, the emulsion composition having a continuous phase of a liquid rubber material which forms an elastomer through curing.

    摘要翻译： 本发明提供了一种定影压力辊，其具有由乳液制成的多孔材料形成的弹性层，该辊具有改善的耐久性。 定影压力辊具有芯，橡胶层，其厚度为1.0mm以下，并且设置在芯周围，弹性层由由乳液组合物制成的多孔弹性体形成， 橡胶层，该乳液组合物具有通过固化形成弹性体的液体橡胶材料的连续相。

    Developing roll
    6.
    发明授权
    Developing roll 有权

    公开(公告)号：US11934110B2

    公开(公告)日：2024-03-19

    申请号：US17927443

    申请日：2021-03-16

    申请人： NOK CORPORATION

    发明人： Kosuke Oura ,  Atsushi Ikeda ,  Satoshi Fukuoka ,  Kenji Sasaki

    IPC分类号： G03G15/08

    CPC分类号： G03G15/0808 ,  G03G15/0818

    摘要： A developing roll has a metal core, an elastic layer, and a surface layer. A value X is 65.6 N/mm3 or more and a value Y is 229 μm or more. The value X is P1/(D1×A)−P2/(D2×A). P1 is the load to displace the roll 100 μm when a metal probe is pressed against the roll. D1 is the displacement of the roll caused by the probe under the load P1. A is the area of the probe. P2 is the load to displace a material roll by 100 μm when the probe presses against the material roll with the core and the elastic layer and without the surface layer. D2 is the displacement of the material roll caused by the probe under the load P2. The value Y is the displacement of the roll when the probe pierces the surface layer.

    Developing roll
    7.
    发明授权
    Developing roll 有权

    公开(公告)号：US11921439B2

    公开(公告)日：2024-03-05

    申请号：US18010276

    申请日：2021-04-02

    申请人： NOK CORPORATION

    发明人： Kosuke Oura ,  Atsushi Ikeda ,  Kenji Sasaki

    IPC分类号： G03G15/08

    CPC分类号： G03G15/0818

    摘要： A developing roll used in an electrophotographic image forming apparatus has a metal core member, an elastic layer made of a rubber disposed around the core member, and a surface layer disposed around the elastic layer. The texture aspect ratio of the surface Str of the surface layer is equal to or greater than 0.55.

    Conductive roller, image forming apparatus, and inspection method for conductive roller
    8.
    发明授权
    Conductive roller, image forming apparatus, and inspection method for conductive roller 有权

    公开(公告)号：US11947272B2

    公开(公告)日：2024-04-02

    申请号：US18016944

    申请日：2021-05-10

    申请人： NOK CORPORATION

    发明人： Shogo Suzuki ,  Atsushi Ikeda ,  Satoshi Fukuoka ,  Kenji Sasaki

    IPC分类号： G03G15/02 ,  G03G15/00

    CPC分类号： G03G15/0233 ,  G03G15/50 ,  G03G2215/025

    摘要： A conductive roller includes: a core member including an outer surface along and about an axial line thereof; and a surface layer arranged along the outer surface of the core member. The surface layer includes a conductive portion formed of a conductive resin composition, and a surface roughness imparting material in a form of particles dispersed in the conductive portion. An average particle size of the surface roughness imparting material is in a range of 6 micrometers or greater and 10 micrometers or less. The number of particles of the surface roughness imparting material per unit area of the surface layer is in a range of 1.0×104 particles per mm2 or greater and 2.0×106 particles per mm2 or less. An average thickness of the surface layer is in a range of 3.0 micrometers or greater and 15.0 micrometers or less.

    Charging roll
    9.
    发明授权
    Charging roll 有权

    公开(公告)号：US11480886B2

    公开(公告)日：2022-10-25

    申请号：US17311450

    申请日：2020-02-25

    申请人： NOK CORPORATION

    发明人： Asami Uematsu ,  Atsushi Ikeda ,  Shogo Suzuki ,  Kosuke Oura ,  Satoshi Fukuoka ,  Kenji Sasaki

    IPC分类号： G03G15/02

    摘要： A charging roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The ten point height of irregularities RZ of a surface of the surface layer is equal to or greater than 3.9 micrometers, and is equal to or less than 6.1 micrometers. The mean spacing between peaks Sm of the surface of the surface layer is equal to or greater than 12.5 micrometers and is equal to or less than 13.5 micrometers.