公开(公告)号：US20230314979A1

公开(公告)日：2023-10-05

申请号：US18016944

申请日：2021-05-10

Applicant: NOK CORPORATION

Inventor： Shogo SUZUKI ,  Atsushi IKEDA ,  Satoshi FUKUOKA ,  Kenji SASAKI

IPC: G03G15/02 ,  G03G15/00

CPC classification number: G03G15/0233 ,  G03G15/50

Abstract: 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.

公开(公告)号：US20240142890A1

公开(公告)日：2024-05-02

申请号：US18273185

申请日：2021-12-03

Applicant: NOK CORPORATION

Inventor： Kosuke OURA ,  Norimasa HOSONUMA ,  Atsushi IKEDA ,  Yu AKAI ,  Satoshi FUKUOKA ,  Kenji SASAKI

IPC: G03G15/08

CPC classification number: G03G15/0808 ,  G03G15/0881

Abstract: A developing roll for use in an image-forming apparatus using electrophotography includes a cylindrical core made of metal; an annular elastic layer made of rubber and arranged around the core; and an annular surface layer arranged around the elastic layer. The surface layer includes a central portion and end portions. The central portion is located at the center of the developing roll in the longitudinal direction, the end portions are located at opposite end portions of the developing roll in the longitudinal direction. A coefficient of kinetic friction of the outer peripheral surface of each end portion of the surface layer is less than or equal to 0.1, and a ten-point average roughness Rz of the outer peripheral surface of each end portion of the surface layer is less than or equal to 1.8 μm.

公开(公告)号：US20230221661A1

公开(公告)日：2023-07-13

申请号：US17927443

申请日：2021-03-16

Applicant: NOK CORPORATION

Inventor： Kosuke OURA ,  Atsushi IKEDA ,  Satoshi FUKUOKA ,  Kenji SASAKI

IPC: G03G15/08

CPC classification number: G03G15/0808 ,  G03G15/0818

Abstract: 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/(D2×A) P2/(D2× A). P1 is the load to displace the roll by 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 is pressed 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 developing roll when the probe pierces the surface layer.

公开(公告)号：US20220026824A1

公开(公告)日：2022-01-27

申请号：US17311473

申请日：2020-02-25

Applicant: NOK CORPORATION

Inventor： Asami UEMATSU ,  Atsushi IKEDA ,  Shogo SUZUKI ,  Kosuke OURA ,  Satoshi FUKUOKA ,  Kenji SASAKI

IPC: G03G15/02

Abstract: 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 6.5 micrometers, and is equal to or less than 11.7 micrometers. The mean spacing between peaks Sm of the surface of the surface layer is equal to or greater than 16.5 micrometers and is equal to or less than 18.8 micrometers.

公开(公告)号：US20200125003A1

公开(公告)日：2020-04-23

申请号：US16610448

申请日：2018-06-12

Applicant: NOK CORPORATION ,  SYNZTEC CO., LTD.

Inventor： Atsushi IKEDA ,  Hiroaki KANEDA ,  Tomohiro KONDO ,  Goki INUKAI

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

Abstract: 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.

公开(公告)号：US20230288834A1

公开(公告)日：2023-09-14

申请号：US18016949

申请日：2021-05-10

Applicant: NOK CORPORATION

Inventor： Shogo SUZUKI ,  Atsushi IKEDA ,  Satoshi FUKUOKA ,  Kenji SASAKI

IPC: G03G15/02 ,  G03G15/08

CPC classification number: G03G15/0233 ,  G03G15/0818 ,  F16C13/00

Abstract: 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, 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 less than 10 micrometers. The number of particles of the surface roughness imparting material per unit area of the surface layer is in a range of 3.5×105 particles per mm2 or greater and 7.5×105 particles per mm2 or less. An average thickness of the surface layer is in a range of 0.2 micrometers or greater and 5.5 micrometers or less.

公开(公告)号：US20170023876A1

公开(公告)日：2017-01-26

申请号：US15300765

申请日：2015-04-08

Applicant: NOK Corporation ,  Synztec Co., Ltd.

Inventor： Toshihiro HIGASHIRA ,  Atsushi IKEDA ,  Tomohiro KONDO

IPC: G03G15/08 ,  C09D7/12 ,  C09D175/04 ,  C09D5/00

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

Abstract: 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.

Abstract translation: 本发明的目的是提供一种在橡胶构件表面上具有均匀粗糙表面的显影辊橡胶构件，其能够确保足够的厚度而不污染周边部分，同时保持涂层的柔性和 凸部，而不损害橡胶基材层的柔软性，并且具有实现非粘合性和低摩擦性的涂层及其制造方法，其目的是通过将反应性硅油，异氰酸酯化合物和 通过使反应性硅油和异氰酸酯化合物在反应容器中的稀释溶剂中反应成聚合状态的预聚合反应，能够将反应性硅油和异氰酸酯化合物两者同时溶解在反应容器中的稀释溶剂， 通过随后混合多元醇和异氰酸酯化合物，维持溶剂的溶解 溶液，并使用硅橡胶颗粒101制备涂层13组分的涂布液，并通过在显影辊1周围施涂和固化涂布液进行形成。

公开(公告)号：US20130287461A1

公开(公告)日：2013-10-31

申请号：US13869552

申请日：2013-04-24

Applicant: NOK CORPORATION ,  SYNZTEC CO., LTD

Inventor： Shingo SUGIYAMA ,  Junichi NAKAYAMA ,  Wataru NEMOTO ,  Atsushi IKEDA

IPC: G03G15/20

CPC classification number: G03G15/2089 ,  G03G15/206 ,  G03G2215/2025 ,  G03G2215/2035

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20240094656A1

公开(公告)日：2024-03-21

申请号：US18274901

申请日：2021-12-03

Applicant: NOK CORPORATION

Inventor： Shogo SUZUKI ,  Atsushi IKEDA ,  Satoshi FUKUOKA ,  Kenji SASAKI

IPC: G03G15/02

CPC classification number: G03G15/0233

Abstract: A charging roll includes a core, a rubber substrate arranged around the core, and a surface layer arranged around the rubber substrate. The surface layer includes a conductive matrix containing a base material formed of an insulator, and a conductive material dispersed in the base material, and particles of a surface roughness-imparting material dispersed in the conductive matrix. Each of the particles of the surface roughness-imparting material is formed of an insulator, is porous, and has a specific surface area of 8.7 m2/g or greater and 55 m2/g or less.

公开(公告)号：US20230244154A1

公开(公告)日：2023-08-03

申请号：US18010276

申请日：2021-04-02

Applicant: NOK CORPORATION

Inventor： Kosuke OURA ,  Atsushi IKEDA ,  Kenji SASAKI

IPC: G03G15/08

CPC classification number: G03G15/0818

Abstract: 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.