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公开(公告)号：US11079700B2
公开(公告)日：2021-08-03
申请号：US16811483
申请日：2020-03-06
申请人： Keiji Makabe , Tsuneyasu Nagatomo , Kohsuke Satoh , Daichi Hisakuni , Kousuke Suzuki , Shintaro Akiyama
发明人： Keiji Makabe , Tsuneyasu Nagatomo , Kohsuke Satoh , Daichi Hisakuni , Kousuke Suzuki , Shintaro Akiyama
摘要： An image forming apparatus is provided that includes: an image bearer; a charger; an irradiator; a developing device containing a toner; and a transfer device. The image bearer has a Martens hardness of from 185 to 250 N/m2. The toner satisfies a relation 0.13≤X/Dn≤0.16, where X [μm] represents an average value of an amount of deformation of the toner by micro-indentation at when a load reaches 3.00×10−4 N at a loading rate of 3.0×10−5 N/sec under an environment of 32 degrees C. and 40% RH, and Dn [μm] represents a number average particle diameter of the toner. The toner contains an external additive comprising silica particles and particles composed mainly of strontium titanate. The particles composed mainly of strontium titanate further contain a third element M selected from the group consisting of La, Mg, Ca, Sn, and Si.
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公开(公告)号：US11054757B2
公开(公告)日：2021-07-06
申请号：US16583861
申请日：2019-09-26
摘要： A toner including toner base particles each including a binder resin and a colorant, and external additive, wherein the toner satisfies conditions (a), (b), and (c) below: (a) storage elastic modulus G′(50) of the toner at 50° C. and storage elastic modulus G′(90) of the toner at 90° C. satisfy Formula (1); G′(50)/G′(90)≥6.0×102 Formula (1) (b) a BET specific surface area Bt(m2/g) of the toner and a coverage Ct (%) of the toner base particles covered with the external additive satisfy Formula (2); and Bt−0.03×Ct≤1.60 Formula (2) (c) the external additive includes at least cohered particles, the cohered particles are non-spherical secondary particles each formed through cohesion of primary particles, and a number average secondary particle diameter of the cohered particles is 130 nm or greater.
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公开(公告)号：US20160334722A1
公开(公告)日：2016-11-17
申请号：US15134575
申请日：2016-04-21
申请人： Keiji MAKABE , Tsuneyasu Nagatomo , Kohsuke Satoh , Junichi Watanabe , Kenji Yoneda , Daichi Hisakuni
发明人： Keiji MAKABE , Tsuneyasu Nagatomo , Kohsuke Satoh , Junichi Watanabe , Kenji Yoneda , Daichi Hisakuni
IPC分类号： G03G9/00
CPC分类号： G03G9/0821 , G03G9/0819 , G03G9/0827 , G03G9/08755 , G03G9/08764 , G03G15/08 , G03G21/18
摘要： A toner includes a base particle; and an external additive covering the base particle. The toner includes a tetrahydrofuran (THF)-insoluble component having a glass transition temperature determined from a DSC curve when heated for the second time of from −50° C. to 10° C. and an average circularity not greater than 0.98, and satisfies the following relation: Bt−0.025×Ct≦1.80 wherein Bt represents a BET specific surface area [m2/g]; and Ct represents a coverage [%] of the external additive covering the base particle.
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公开(公告)号：US20160266507A1
公开(公告)日：2016-09-15
申请号：US15052160
申请日：2016-02-24
申请人： Junichi WATANABE , Kenji Yoneda , Kohsuke Satoh , Tsuneyasu Nagatomo , Keiji Makabe , Daichi Hisakuni
发明人： Junichi WATANABE , Kenji Yoneda , Kohsuke Satoh , Tsuneyasu Nagatomo , Keiji Makabe , Daichi Hisakuni
IPC分类号： G03G9/00
CPC分类号： G03G9/0819 , G03G9/0821 , G03G9/0827 , G03G9/08755 , G03G9/09725
摘要： A toner includes a base particle comprising a crystalline polyester resin; and an external additive which is a group of silica particles having a number-average particle diameter of from 0.01 μm to 0.11 μm on the surface of the toner. A number ratio of the silica particles having a circularity not less than 0.8 is 20% or more in the total number of the silica particles.
摘要翻译： 调色剂包括包含结晶聚酯树脂的基础颗粒; 以及作为调色剂表面的数均粒径为0.01μm〜0.11μm的一组二氧化硅粒子的外部添加剂。 圆形度不小于0.8的二氧化硅颗粒的数量比在二氧化硅颗粒的总数中为20％以上。
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公开(公告)号：US09274445B2
公开(公告)日：2016-03-01
申请号：US13800099
申请日：2013-03-13
申请人： Junichi Awamura , Teruki Kusahara , Satoshi Ogawa , Daisuke Ito , Daisuke Inoue , Osamu Uchinokura , Satoshi Kojima , Tsuneyasu Nagatomo , Mamoru Hozumi , Syouko Satoh
发明人： Junichi Awamura , Teruki Kusahara , Satoshi Ogawa , Daisuke Ito , Daisuke Inoue , Osamu Uchinokura , Satoshi Kojima , Tsuneyasu Nagatomo , Mamoru Hozumi , Syouko Satoh
CPC分类号： G03G9/0819 , G03G9/0804 , G03G9/0821 , G03G9/08782 , G03G9/08795 , G03G9/08797
摘要： A toner set, including: a transparent toner including a binder resin a, a releasing agent a and no colorant; and one or more color toners, each including a binder resin b, a colorant b and a releasing agent b, wherein the binder resin a includes a non-crystalline resin α and a crystalline resin α, the binder resin b includes a non-crystalline resin β and a crystalline resin β, the releasing agent a has an average particle diameter as a long diameter of 0.2 μm to 2.0 μm, and there is a relationship of 1
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公开(公告)号：US20150104739A1
公开(公告)日：2015-04-16
申请号：US14384490
申请日：2013-03-07
申请人： Tsuneyasu Nagatomo , Satoshi Kojima , Syouko Satoh , Kiwako Hirohara , Osamu Uchinokura , Junichi Awamura , Satoshi Ogawa , Takahiro Honda
发明人： Tsuneyasu Nagatomo , Satoshi Kojima , Syouko Satoh , Kiwako Hirohara , Osamu Uchinokura , Junichi Awamura , Satoshi Ogawa , Takahiro Honda
IPC分类号： G03G9/00
CPC分类号： G03G9/08755 , G03G9/0804 , G03G9/0819 , G03G9/08797 , G03G9/09716 , G03G9/09725
摘要： A toner, containing: toner base particles; and an external additive, the toner base particles each including a binder resin and a releasing agent, wherein the external additive includes non-spherical coalesced particles in each of which primary particles are coalesced together, and wherein the coalesced particles satisfy the following formula (1): Nx/1,000×100≦30% where Nx is a number of the primary particles present alone relative to 1,000 of the coalesced particles, as observed under a scanning electron microscope after stirring 0.5 g of the coalesced particles and 49.5 g of a carrier placed in a 50 mL bottle for 10 minutes by means of a mixing and stirring device at 67 Hz.
摘要翻译： 调色剂，含有：调色剂基础颗粒; 和外部添加剂，所述调色剂基础颗粒各自包含粘合剂树脂和脱模剂，其中所述外部添加剂包括其中一次颗粒聚结在一起的非球形聚结颗粒，并且其中所述聚结颗粒满足下式（1 ）：Nx / 1,000×100＆nlE; 30％其中Nx是相对于1000个聚结颗粒单独存在的一次颗粒数，如在扫描电子显微镜下观察到的，搅拌0.5g聚结颗粒和49.5g载体 通过67Hz的混合搅拌装置置于50mL瓶中10分钟。
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公开(公告)号：US20140234767A1
公开(公告)日：2014-08-21
申请号：US14182446
申请日：2014-02-18
申请人： Junichi AWAMURA , Tsuneyasu Nagatomo , Satoshi Kojima , Shingo Sakashita , Tomoki Murayama , Masaya Fukuda
发明人： Junichi AWAMURA , Tsuneyasu Nagatomo , Satoshi Kojima , Shingo Sakashita , Tomoki Murayama , Masaya Fukuda
CPC分类号： G03G9/09725 , G03G9/0804 , G03G9/08755 , G03G9/09716
摘要： Provided is an electrostatic charge image developing toner, including: toner base particles including a polyester resin as a binder resin; and an external additive on the surface of the toner base particles. The external additive includes silica. The silica is produced by sol-gel method, and is aspherical. The percentage of change in the specific surface area of the toner when it is stored under high-temperature, high-humidity conditions is from 25% to 45%.
摘要翻译： 提供一种静电荷图像显影调色剂，其包括：包含作为粘合剂树脂的聚酯树脂的调色剂基础颗粒; 和在调色剂基础颗粒的表面上的外部添加剂。 外部添加剂包括二氧化硅。 二氧化硅通过溶胶 - 凝胶法制成，为非球面。 当调色剂在高温高湿条件下储存时，比表面积的变化百分比为25％至45％。
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公开(公告)号：US20140072349A1
公开(公告)日：2014-03-13
申请号：US14022691
申请日：2013-09-10
IPC分类号： G03G15/09
CPC分类号： G03G15/0822 , G03G9/09716 , G03G9/09725 , G03G9/10 , G03G9/107 , G03G9/1075 , G03G9/1132 , G03G9/1139
摘要： A developing device, including: a developer bearing member, which is disposed opposite to an electrostatic latent image bearing member and which bears thereon a developer for developing an electrostatic latent image formed on the electrostatic latent image bearing member and conveys the developer to a developing region, wherein the developer includes a toner and a carrier, the toner containing: a toner base containing a binder resin and a colorant; and an external additive, wherein the external additive contains coalescent particles each made up of a plurality of coalescing primary particles, and wherein a work function Wc of the carrier and a work function Ws of the developer bearing member satisfy a relationship of the following formula (1): Ws−Wc≧0.4 eV (1)
摘要翻译： 一种显影装置，包括：显影剂承载构件，其与静电潜像承载构件相对地设置并承载有形成在静电潜像承载构件上的静电潜像的显影剂，并将显影剂输送到显影区域 其中所述显影剂包括调色剂和载体，所述调色剂含有：含有粘合剂树脂和着色剂的调色剂基料; 和外部添加剂，其中所述外部添加剂包含各自由多个聚结一次颗粒构成的聚结剂颗粒，并且其中载体的功函数Wc和显影剂承载构件的功函数Ws满足以下关系式（ 1）：Ws-Wc> = 0.4eV（1）
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公开(公告)号：US20130244158A1
公开(公告)日：2013-09-19
申请号：US13800099
申请日：2013-03-13
申请人： Junichi AWAMURA , Teruki Kusahara , Satoshi Ogawa , Daisuke Ito , Daisuke Inoue , Osamu Uchinokura , Satoshi Kojima , Tsuneyasu Nagatomo , Mamoru Hozumi , Syouko Satoh
发明人： Junichi AWAMURA , Teruki Kusahara , Satoshi Ogawa , Daisuke Ito , Daisuke Inoue , Osamu Uchinokura , Satoshi Kojima , Tsuneyasu Nagatomo , Mamoru Hozumi , Syouko Satoh
CPC分类号： G03G9/0819 , G03G9/0804 , G03G9/0821 , G03G9/08782 , G03G9/08795 , G03G9/08797
摘要： A toner set, including: a transparent toner including a binder resin a, a releasing agent a and no colorant; and one or more color toners, each including a binder resin b, a colorant b and a releasing agent b, wherein the binder resin a includes a non-crystalline resin α and a crystalline resin α, the binder resin b includes a non-crystalline resin β and a crystalline resin β, the releasing agent a has an average particle diameter as a long diameter of 0.2 μm to 2.0 μm, and there is a relationship of 1
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10.发明授权Image forming apparatus, image forming method, and toner for image forming apparatus 有权图像形成装置，图像形成方法和图像形成装置用调色剂公开(公告)号：US08377620B2
公开(公告)日：2013-02-19
申请号：US12276827
申请日：2008-11-24
IPC分类号： G03G21/10
CPC分类号： G03G21/00 , G03G9/0804 , G03G9/0815 , G03G9/0817 , G03G9/09716 , G03G9/09725 , G03G2221/0005
摘要： An image forming method including charging an image bearing member by applying combination of DC voltage and AC voltage with frequency of 6.5 to 8.5 cycle/mm; irradiating the image bearing member with light to form an electrostatic image; developing the electrostatic image with a developer including toner to form a toner image; transferring the toner image onto a receiving material; fixing the toner image; cleaning the image bearing member with a blade; then applying a lubricant to the image bearing member; and then spreading the lubricant with a spreading member countering the image bearing member. The toner includes toner particles granulated in an aqueous medium; and at least three kinds of external additives including a first particulate hydrophobic silica, a particulate hydrophobic titanium oxide and a second particulate hydrophobic silica respectively having BET specific surface areas of 20 to 40 m2/g, 40 to 80 m2/g, and 130 to 300 m2/g.
摘要翻译： 一种图像形成方法，包括通过施加直流电压和交流电压的组合使频率为6.5至8.5周/ mm的图像承载部件; 用光照射图像承载部件以形成静电图像; 用包含调色剂的显影剂显影静电图像以形成调色剂图像; 将调色剂图像转印到接收材料上; 固定调色剂图像; 用刀片清洁图像承载部件; 然后向图像承载部件施加润滑剂; 然后用对准图像承载部件的扩展部件分散润滑剂。 调色剂包括在水性介质中造粒的调色剂颗粒; 以及分别具有20〜40m 2 / g，40〜80m 2 / g的BET比表面积和40〜80m 2 / g的130〜80m 2 / g的至少3种外部添加剂，所述外部添加剂包括第一粒状疏水性二氧化硅，微粒状疏水性氧化钛和第二粒状疏水性二氧化硅 300 m2 / g。
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