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公开(公告)号：US20220066337A1
公开(公告)日：2022-03-03
申请号：US17395098
申请日：2021-08-05
Applicant: Konica Minolta, Inc.
Inventor： Akihiko ITAMI , Seijiro TAKAHASHI , Seisuke MAEDA
Abstract: An image forming method uses an electrophotographic photoreceptor and a toner for developing an electrostatic charge image. The image forming method has a charging step, an exposure step, a developing step, a transfer step and a cleaning step, wherein the charging step uses a contact charging device; the photoreceptor has a universal hardness value (HU) of 170 N/mm2 or more, and an elastic deformation ratio of 40% or more when a Vickers indenter is used in a predetermined environment and pushed by a maximum load of 2 mN. The toner for developing an electrostatic charge image contains toner base particles of a core-shell structure having a shell layer of 10% by mass or less with respect to a mass of a toner base particle on an outside of a resin constituting a core particle, and a solubility parameter value (SPs) of a resin constituting the shell layer is 10.75 or less.
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公开(公告)号：US20180164710A1
公开(公告)日：2018-06-14
申请号：US15837586
申请日：2017-12-11
Applicant: KONICA MINOLTA, INC.
Inventor： Kazuhiro KURAMOCHI , Seisuke MAEDA , Kuniaki KASHIWAKURA
CPC classification number: G03G15/0233 , G03G5/147 , G03G5/14704 , G03G5/14726 , G03G5/14734
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：US20180143545A1
公开(公告)日：2018-05-24
申请号：US15819597
申请日：2017-11-21
Applicant: Konica Minolta, Inc.
Inventor： Seisuke MAEDA , Kazunori KURIMOTO , Kazuhiro KURAMOCHI
CPC classification number: G03G5/087 , G03G5/14704 , G03G5/14708 , G03G5/14726 , G03G15/75
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：US20170285496A1
公开(公告)日：2017-10-05
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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公开(公告)号：US20170131645A1
公开(公告)日：2017-05-11
申请号：US15345993
申请日：2016-11-08
Applicant: Konica Minolta, Inc.
Inventor： Seisuke MAEDA , Kazunori KURIMOTO , Kazuhiro KURAMOCHI
IPC: G03G15/00
CPC classification number: G03G5/14717 , G03G5/047 , G03G5/0507 , G03G5/0517 , G03G5/14704 , G03G5/14708 , G03G5/14791
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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Patent Agency Ranking
公开(公告)号：US20220057724A1
公开(公告)日：2022-02-24
申请号：US17395051
申请日：2021-08-05
Applicant: Konica Minolta, Inc.
Inventor： Seisuke MAEDA
Abstract: Provided is an image forming method using an electrophotographic photoreceptor and a toner for developing an electrostatic charge image, and including at least a charging step, an exposure step, a developing step, and a transfer step, wherein the electrophotographic photoreceptor has a photosensitive layer, and the photosensitive layer contains a compound having a structure represented by the following Formula (1) or Formula (2); and in the developing step, the toner for developing an electrostatic charge image containing titanic acid compound particles doped with at least lanthanum as an external additive is used,
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公开(公告)号：US20210318632A1
公开(公告)日：2021-10-14
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：US20190212670A1
公开(公告)日：2019-07-11
申请号：US16235450
申请日：2018-12-28
Applicant: Konica Minolta, Inc.
Inventor： Takeshi ISHIDA , Kazuhiro KURAMOCHI , Seisuke MAEDA
IPC: G03G15/043 , G03G15/08 , G03G15/16 , G03G21/06 , G03G5/147
CPC classification number: G03G15/043 , G03G5/047 , G03G5/14708 , G03G15/0898 , G03G15/161 , G03G21/06
Abstract: An image forming apparatus includes: a transferer that transfers a toner image formed on a surface of a photo-conductor onto an image carrier; and an irradiator that irradiates the surface of the photo-conductor before transfer with light such that a potential of an image area where the toner image has been formed and a potential of a non-image area where the toner image has not been formed in the photo-conductor before transfer satisfy formula (1): 0≤|Va|−|Vb|≤200 [V] (1) where |Va| represents the potential of the image area after the surface of the photo-conductor before transfer is irradiated with light, and |Vb| represents the potential of the non-image area after the surface of the photo-conductor before transfer is irradiated with light.
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公开(公告)号：US20180335707A1
公开(公告)日：2018-11-22
申请号：US15966797
申请日：2018-04-30
Applicant: Konica Minolta, Inc.
Inventor： Seisuke MAEDA , Kazunori KURIMOTO , Kazuhiro KURAMOCHI
IPC: G03G5/043
CPC classification number: G03G5/043
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：US20160282735A1
公开(公告)日：2016-09-29
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.
Abstract translation: 本发明提供一种电子照相感光体，其含有导电性支持体，其上具有光敏层和表层，其顺序层叠，其中，表面层含有树脂中数均一次粒径为10〜500nm的导电性填料; 并用含有（甲基）丙烯酸氟烷基酯（甲基）丙烯酸共聚物的表面处理剂处理导电填料。
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