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公开(公告)号：US10175591B2
公开(公告)日：2019-01-08
申请号：US15819597
申请日：2017-11-21
Applicant: Konica Minolta, Inc.
Inventor： Seisuke Maeda , Kazunori Kurimoto , Kazuhiro Kuramochi
Abstract: In an electrophotographic photoreceptor, an electric charge generating layer and an electric charge transport layer are laminated on a conductive support body in this order, a layer configuring an outermost surface of the electrophotographic photoreceptor contains composite structure particles in which a core material is inorganic particles, and the inorganic particles are coated with tin oxide doped with aluminum, and an average particle diameter of primary particles of the composite structure particles is 50 nm to 200 nm.
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公开(公告)号：US09946176B2
公开(公告)日：2018-04-17
申请号：US15074350
申请日：2016-03-18
Applicant: Konica Minolta, Inc.
Inventor： Seisuke Maeda , Kazuhiro Kuramochi
IPC: G03G5/147
CPC classification number: G03G5/14734 , G03G5/14704 , G03G5/14726
Abstract: Provided is an electrophotographic photoreceptor containing a conductive support having thereon a photosensitive layer and a surface layer laminated in that order, wherein the surface layer contains a conductive filler having a number average primary particle size of 10 to 500 nm in a resin; and the conductive filler is treated with a surface treatment agent containing a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer.
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公开(公告)号：US11415904B2
公开(公告)日：2022-08-16
申请号：US17201507
申请日：2021-03-15
Applicant: Konica Minolta, Inc.
Inventor： Seisuke Maeda
Abstract: Provided is an image forming method using a toner for developing an electrostatic charge image and an electrophotographic photoreceptor, and containing at least a charging step, an exposing step, a developing step and a transferring step, wherein the electrophotographic photoreceptor has a photosensitive layer, and the photosensitive layer contains a triphenylamine derivative having a specific structure as a charge transport material, and the toner for developing an electrostatic charge image contains at least titanic acid compound particles as an external additive.
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公开(公告)号：US20180307148A1
公开(公告)日：2018-10-25
申请号：US15948032
申请日：2018-04-09
Applicant: Konica Minolta, Inc.
Inventor： Takeshi Ishida , Seisuke Maeda , Kazuhiro Kuramochi
CPC classification number: G03G5/147 , G03G5/0564 , G03G5/14704 , G03G5/14726 , G03G5/14734 , G03G5/14791
Abstract: Provided is an electrophotographic photoreceptor obtained by laminating a photosensitive layer and a surface protective layer in this order on a conductive support, wherein the surface protective layer contains conductive fine particles and crosslinkable organic fine particles, and either the conductive fine particles or the crosslinkable organic fine particles have been subjected to surface modification with a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer.
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公开(公告)号：US09639010B2
公开(公告)日：2017-05-02
申请号：US14499900
申请日：2014-09-29
Applicant: Konica Minolta, Inc.
Inventor： Hokuto Hatano , Kazunori Kurimoto , Seisuke Maeda , Hiroki Takao
CPC classification number: G03G5/0575 , G03G5/0507 , G03G5/0542 , G03G5/0546 , G03G5/0592 , G03G5/14704 , G03G5/14708 , G03G5/14734 , G03G5/14769 , G03G5/14791
Abstract: Disclosed is an electrophotographic photoreceptor including a conductive support, a photosensitive layer on the conductive support and a surface layer on the photosensitive layer. The surface layer includes a cured resin prepared by polymerization of a compound having two or more radically polymerizable functional groups per molecule, the cured resin containing an organic resin fine particle and a metal oxide fine particle, and the organic resin fine particle comprising a resin containing a structural unit derived from at least one of melamine and benzoguanamine, the organic resin fine particle having a number average primary particle size of 0.01 to 3.00 μm.
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Patent Agency Ranking
公开(公告)号：US10324387B2
公开(公告)日：2019-06-18
申请号：US15948032
申请日：2018-04-09
Applicant: Konica Minolta, Inc.
Inventor： Takeshi Ishida , Seisuke Maeda , Kazuhiro Kuramochi
IPC: G03G5/147
Abstract: Provided is an electrophotographic photoreceptor obtained by laminating a photosensitive layer and a surface protective layer in this order on a conductive support, wherein the surface protective layer contains conductive fine particles and crosslinkable organic fine particles, and either the conductive fine particles or the crosslinkable organic fine particles have been subjected to surface modification with a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer.
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公开(公告)号：US10234776B2
公开(公告)日：2019-03-19
申请号：US15966797
申请日：2018-04-30
Applicant: Konica Minolta, Inc.
Inventor： Seisuke Maeda , Kazunori Kurimoto , Kazuhiro Kuramochi
IPC: G03G5/147
Abstract: An electrophotographic photoreceptor has a charge generating layer, a charge transporting layer, and an outermost surface layer laminated in this order on a conductive support, wherein the outermost surface layer contains composite structural particles obtained by coating inorganic particles with oxygen-deficient conductive tin oxide, and the composite structural particles have an L value of 80 to 95, and primary particles thereof have an average particle diameter of 35 to 200 nm.
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公开(公告)号：US10101679B2
公开(公告)日：2018-10-16
申请号：US15345993
申请日：2016-11-08
Applicant: Konica Minolta, Inc.
Inventor： Seisuke Maeda , Kazunori Kurimoto , Kazuhiro Kuramochi
Abstract: Provided is an electrographic photoconductor resistant to surface discharge and having good wear resistance. The electrographic photoconductor has a conductive support and a photosensitive layer disposed on the conductive support, the photosensitive layer containing a charge generation material and a charge transport material. A layer forming the surface of the electrographic photoconductor contains a resin binder forming the layer and a layered carbide dispersed in the resin binder. The layer forming the surface has a light transmittance in the range of 20 to 98% at a wavelength of 350 to 800 nm.
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公开(公告)号：US10203625B2
公开(公告)日：2019-02-12
申请号：US15837586
申请日：2017-12-11
Applicant: KONICA MINOLTA, INC.
Inventor： Kazuhiro Kuramochi , Seisuke Maeda , Kuniaki Kashiwakura
Abstract: An electrophotographic image forming apparatus includes: an electrophotographic photosensitive body including an electroconductive substrate, and a charge generating layer, a charge transfer layer and a surface protective layer laminated on the substrate in this order, and a charging roller for causing contact electrification on the surface of the electrophotographic photosensitive body, wherein at least the surface protective layer contains inorganic microparticles having a fluorine compound on the surfaces and a binder resin, and the surface of the charging roller has a maximum height roughness Rz≤0.5 μm.
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公开(公告)号：US10025208B2
公开(公告)日：2018-07-17
申请号：US15450094
申请日：2017-03-06
Applicant: Konica Minolta, Inc.
Inventor： Seisuke Maeda , Kazuhiro Kuramochi
CPC classification number: G03G5/043 , G03G5/05 , G03G5/0592 , G03G5/087 , G03G15/75 , G03G2215/00957
Abstract: An electrophotographic photoreceptor includes: a conductive support; and a photosensitive layer which contains an electric charge generating material and an electric charge transport material, wherein a layer configuring a surface of the electrophotographic photoreceptor contains a resin binder, and conductive particles A and B dispersed in the resin binder, the conductive particles A have a single peak and volume resistance ρ1, the conductive particles B have a single peak and volume resistance ρ2, when a particle diameter of the conductive particles A is set to d1, and a particle diameter of the conductive particles B is set to d2, Expression (1) is satisfied, and when the volume resistance of the conductive particles A is set to ρ1, and the volume resistance of the conductive particles B is set to ρ2, Expression (2) is satisfied: 4×d2≤d1≤20×d2 (1) 10×ρ1
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