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公开(公告)号：US12105470B2
公开(公告)日：2024-10-01
申请号：US17493107
申请日：2021-10-04
发明人： Daisuke Ishizuka , Eiji Kawakami
CPC分类号： G03G9/0819 , G03G9/0821 , G03G9/0827 , G03G15/08
摘要： A toner for developing an electrostatic charge image contains toner particles including first toner particles and second toner particles, the first toner particles having a brightness of less than 90 and the second toner particles having a brightness of 90 or more. The second toner particles constitute 0.1% by number or more and 10% by number or less of the toner particles, and, in the size distribution of the second toner particles, toner particles having a diameter equal to or smaller than the number-average diameter Dn of the toner particles constitute 70% by number or more.
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公开(公告)号：US20240210854A1
公开(公告)日：2024-06-27
申请号：US18596287
申请日：2024-03-05
发明人： Kazuhiro Funatani , Masatake Tanaka , Kentaro Yamawaki , Kenichi Iida , Shinsuke Kobayashi , Kensuke Umeda , Takanori Watanabe , Ai Suzuki
CPC分类号： G03G15/0865 , G03G9/0821 , G03G9/09328 , G03G15/0856 , G03G15/0877 , G03G15/0889
摘要： A mechanism that enables developer replenishment by a simpler structure and a mechanism that enables more user-friendly developer replenishment are provided. An attachment port to which a developer supply bottle containing a developer stored therein is detachably attachable is disposed in an interior of an image forming apparatus. The developer supply bottle can be attached when the cover is in an open state. According to this image forming apparatus, when the developer supply bottle is attached to the attachment port, the developer inside the developer supply bottle moves into a developer housing chamber by its own weight.
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公开(公告)号：US20240142891A1
公开(公告)日：2024-05-02
申请号：US18489272
申请日：2023-10-18
发明人： Minoru WADA , Takahiro OKUBO , Takeru NAGAMOTO
CPC分类号： G03G15/0812 , G03G9/0821 , G03G15/0818 , G03G2215/0617
摘要： An image forming apparatus includes an image carrying member, a charging device, an exposure device, a developing device, a development voltage power supply, and a control section. The developing device includes a development container which contains a non-magnetic one-component developer and a developer carrying member which includes a rotary shaft and a roller portion stacked on the outer circumferential surface of the rotary shaft, and the resistance value of the roller portion is 9 to 11 [Log Ω], and when the amount of toner conveyed on the developer carrying member is Md [g/m2], the amount of toner adhered on the image carrying member in a solid image is Mp [g/m2], the peripheral speed of the developer carrying member and the image carrying member are Sd [mm/sec] and Sp [mm/sec], 0.8×Sd/Sp
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公开(公告)号：US20240085814A1
公开(公告)日：2024-03-14
申请号：US18190076
申请日：2023-03-25
CPC分类号： G03G9/0821 , G03G9/0902 , G03G9/0918 , G03G15/0121 , C08F2800/20
摘要： An electrostatic charge image developing toner set contains a white toner that contains white toner particles including a binder resin, a white colorant, and a release agent, and a non-white color toner that contains color toner particles including a binder resin, a color colorant, and a release agent, in which, in observation of cross sections of the white toner particles and the color toner particles, in a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the white toner particles to a depth of 1 μm or less with respect to an area of all domains of the release agent present in a cross section of the white toner particles is represented by WW, and a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the color toner particles to a depth of 1 μm or less with respect to an area of all domains of the release agent present in a cross section of the color toner particles is represented by WC, a relationship of WC
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公开(公告)号：US20240061356A1
公开(公告)日：2024-02-22
申请号：US18366958
申请日：2023-08-08
发明人： ICHIRO KANNO , HIROKI WATANABE , MARI KABURAGI , HAYATO IDA
CPC分类号： G03G9/09725 , C01B33/02 , G03G9/0821 , G03G9/0819 , G03G9/09716 , C01P2004/62
摘要： The fine particle is a silicon-containing fine particle, wherein the number-average diameter of the fine particle is 0.05 μm to 0.30 μm; the proportion of the silicon atom with reference to the total of the elements is at least 20% according to fluorescent x-ray measurement of the fine particle; and, with respect to the silicon atom proportions measured in analysis by x-ray photoelectron spectroscopy while irradiating with Ar-Kα radiation and etching, the proportions of silicon atoms having prescribed structures vary at prescribed depths.
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公开(公告)号：US11899397B2
公开(公告)日：2024-02-13
申请号：US17224417
申请日：2021-04-07
发明人： Osamu Wada , Yoritaka Tsubaki
CPC分类号： G03G9/09733 , G03G9/0819 , G03G9/0821 , G03G9/08755 , G03G9/1138
摘要： The peak top molecular weight of the tetrahydrofuran-soluble component of the toner, as measured by gel permeation chromatography, is 4,000 or more and 6,500 or less. The tetrahydrofuran-insoluble component of the toner is 10% by weight or more and 30% by weight or less. When the endothermic peak temperature T1 in the heating process and the exothermic peak temperature T2 during the cooling process originating from the ester wax is measured using a differential scanning calorimeter, the value T1-T2 is 15° C. or more and 30° C. or less.
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公开(公告)号：US20230418174A1
公开(公告)日：2023-12-28
申请号：US18339928
申请日：2023-06-22
发明人： YUHEI TERUI , KENJI AOKI , SHINTARO NOJI , YU YOSHIDA , MARIKO YAMASHITA
CPC分类号： G03G9/08711 , G03G9/0821
摘要： A toner comprising a toner particle, the toner particle comprising a resin, wherein, where a chloroform-soluble component of the resin is analyzed by gradient LC analysis using acetonitrile as a poor solvent and chloroform as a good solvent for the chloroform-soluble component of the resin, a peak detected in a range of a ratio of chloroform in the mobile phase of 50.0 to 75.0% by volume and a peak detected in a range of a ratio of chloroform in the mobile phase of 75.0 to 95.0% by volume satisfy a specific relationship.
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公开(公告)号：US20230384702A1
公开(公告)日：2023-11-30
申请号：US18321312
申请日：2023-05-22
发明人： KEISUKE ADACHI , SHINTARO NOJI , KENJI OOKUBO
CPC分类号： G03G9/09328 , G03G9/09733 , G03G9/0821
摘要： A toner comprising a toner particle comprising a toner core particle and a shell covering the toner core particle, wherein the shell comprises an organosilicon polymer, the shell encapsulates a domain of a release agent, and in cross-sectional observation of the toner particle by a transmission electron microscope, a ratio of domains of the release agent that are not in contact with the toner core particle to a total number of the observed domains of the release agent is 85% by number or more.
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公开(公告)号：US11829103B2
公开(公告)日：2023-11-28
申请号：US17148881
申请日：2021-01-14
CPC分类号： G03G9/08755 , C08F212/08 , C08G63/06 , C08G63/52 , G03G9/0819 , G03G9/0821 , G03G9/0825 , G03G9/08711 , G03G9/09733 , G03G2215/0614
摘要： An electrostatic image developing toner includes an amorphous polyester resin and a crystalline polyester resin, wherein a Net intensity NNa of a Na element and a Net intensity NCl of a Cl element, the Net intensities NNa and NCl being determined by X-ray fluorescence analysis, satisfy 2.5≤NCl/NNa≤260.0.
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公开(公告)号：US20230305416A1
公开(公告)日：2023-09-28
申请号：US18185422
申请日：2023-03-17
发明人： KENTARO KAMAE , YUU NISHIMURA , HISASUKE KAJIHARA , TAKAHO SHIBATA , MAKI IMURA
CPC分类号： G03G9/08755 , G03G9/0821 , G03G9/0819 , G03G9/0825 , G03G9/09733 , C08G63/16
摘要： A toner including a toner particle containing a binder resin containing an amorphous polyester A and a crystalline polyester C, and a wax, and a silica fine particle, wherein the content of the crystalline polyester C is within a specific range, the softening point of the amorphous polyester A satisfies a specific relationship, and in an X-ray diffraction spectrum under a specific temperature condition for the toner, there is a peak corresponding to the crystalline polyester C, a wax index AW1 and a crystalline polyester index AC1 of the toner satisfy a specific relationship, the silica fine particle contains a silica fine particle A having a maximum diameter of primary particle in a specific range, and the average coverages of the surface of the toner before and after the toner is treated with hexane with the silica fine particle A satisfy a specific relationship.
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