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公开(公告)号：US20190049871A1
公开(公告)日：2019-02-14
申请号：US16076932
申请日：2017-10-16
发明人： Noriaki SAKAMOTO
CPC分类号： G03G9/1134 , G03G9/08728 , G03G9/09733 , G03G9/1132 , G03G9/1139
摘要： A two-component developer includes toner particles and carrier particles. The toner particles each include a toner mother particle and first resin particles. The carrier particles each include a carrier mother particle and second resin particles. An amount of the second resin particles is at least 0.010 parts by mass and no greater than 0.100 parts by mass relative to 100 parts by mass of the carrier mother particles. The first resin particles and the second resin particles have a number average primary particle diameter of at least 40 nm and no greater than 100 nm and a blocking rate (measurement temperature: 160° C.) of less than 30% by mass. A difference in blocking rate between the first resin particles and the second resin particles is no greater than 5% by mass, and a difference in number average primary particle diameter therebetween is no greater than 5 nm.
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公开(公告)号：US09964878B2
公开(公告)日：2018-05-08
申请号：US15553623
申请日：2016-03-01
发明人： Yohei Ishikawa , Shinya Sasaki
CPC分类号： G03G9/0827 , G03G9/0819 , G03G9/107 , G03G9/1075 , G03G9/113 , G03G9/1131 , G03G9/1132
摘要： A carrier core material is represented by a composition formula MxFe3-xO4 (where M is Mn and/or Mg, and X is a total of Mn and Mg and is a substitution number of Fe by Mn and Mg, 0
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公开(公告)号：US09835967B2
公开(公告)日：2017-12-05
申请号：US15367654
申请日：2016-12-02
CPC分类号： G03G9/1138 , G03G9/0804 , G03G9/0808 , G03G9/0815 , G03G9/0817 , G03G9/0819 , G03G9/0827 , G03G9/0918 , G03G9/1075 , G03G9/1131 , G03G9/1132 , G03G9/1133 , G03G9/1135 , G03G9/1136 , G03G9/1139
摘要： A developer mix used in a dual component development (DCD) system is a mixture of toner particles and magnetic carrier particles, wherein the magnetic carrier particle is surface treated with a hydrophobized titania particle. The surface treatment with a hydrophobized titania particle may be selected from either a spherical, disk, or spindle shaped. Tribocharge of the toner and the toner charge stability across cartridge life or environments may be suitably modified by selecting a preferred size and shape of the hydrophobized titania.
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公开(公告)号：US20170255120A1
公开(公告)日：2017-09-07
申请号：US15223771
申请日：2016-07-29
申请人： FUJI XEROX CO., LTD.
CPC分类号： G03G9/1133 , G03G9/113 , G03G9/1132
摘要： An electrostatic charge image developing carrier includes magnetic particles and a resin coating layer which covers the magnetic particles, wherein a sulfate ion concentration of the resin coating layer is 0.05% by weight or less with respect to a total weight of the resin coating layer, and when a total value of a molar amount of sulfate ions contained and a molar amount of sulfo groups contained per 1 g of the resin coating layer is A mol and a molar amount of sodium ions contained per 1 g of the resin coating layer is B mol, a relationship of 0.1
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公开(公告)号：US09740129B2
公开(公告)日：2017-08-22
申请号：US15031944
申请日：2014-10-29
发明人： Shinya Sasaki , Yohei Ishikawa , Haruka Seki
CPC分类号： G03G9/1075 , C01G49/0018 , C01G49/0072 , C01P2004/03 , C01P2004/61 , C01P2006/40 , G03G9/107 , G03G9/1132 , G03G9/1136 , H01F1/36
摘要： Ferrite particles have, as a main component, a material represented by a composition formula MxFe3−xO4 (where M is at least one type of metal selected from a group made of Mg, Mn, Ca, Ti, Cu, Zn, Sr and Ni, 0
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公开(公告)号：US09651886B2
公开(公告)日：2017-05-16
申请号：US14423227
申请日：2012-08-30
申请人： Takeshi Kawauchi , Tomohide Iida
发明人： Takeshi Kawauchi , Tomohide Iida
CPC分类号： G03G9/1075 , G03G5/107 , G03G9/0815 , G03G9/107 , G03G9/113 , G03G9/1132 , G03G9/1136
摘要： This invention is directed to a method for manufacturing carrier core particles for electrophotographic developer containing iron, manganese, and calcium as a core composition. The method includes (A) a mixing step of mixing an iron-containing raw material, a manganese-containing raw material, and a calcium-containing raw material to prepare a mixture thereof, (C) a granulation step of granulating the mixture after the mixing step, and (D) a firing step of firing a powdery material, which is obtained by granulating the mixture in the granulation step, at a predetermined temperature to form a magnetic phase. The calcium-containing raw material is provided in a granular form, and primary particles of the calcium-containing raw material have a volume mean diameter of 1 μm or less.
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公开(公告)号：US09594325B2
公开(公告)日：2017-03-14
申请号：US14829339
申请日：2015-08-18
发明人： Yusuke Kurano
CPC分类号： G03G9/1132 , G03G9/10 , G03G13/013 , G03G13/16 , G03G15/1605 , G03G2215/0132 , G03G2215/0607
摘要： A two-component developer includes a toner and a carrier. The toner includes a plurality of toner particles. The carrier includes a plurality of carrier particles. Each of the toner particles includes a toner core and a shell layer disposed over the surface of the toner core. The toner has a charge decay constant of at least 0.020 and no greater than 0.050 as measured with the toner particles in an external additive-free state. The carrier has a volume resistivity of at least 1.0×1012 Ω·cm.
摘要翻译： 双组分显影剂包括调色剂和载体。 调色剂包括多个调色剂颗粒。 载体包括多个载体颗粒。 每个调色剂颗粒包括调色剂芯和设置在调色剂芯的表面上的壳层。 调色剂的电荷衰减常数至少为0.020且不大于0.050，其用调色剂颗粒在外部无添加剂状态下测量。 载体的体积电阻率至少为1.0×1012Ω·cm。
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公开(公告)号：US09482977B2
公开(公告)日：2016-11-01
申请号：US14990409
申请日：2016-01-07
申请人： Konica Minolta, Inc.
发明人： Shinya Obara , Satoshi Uchino , Kosuke Nakamura
CPC分类号： G03G9/1132 , G03G9/0819 , G03G9/0827
摘要： Disclosed is a two-component developer containing toner particles and carrier particles. The number-average particle diameter of the toner particles MDt ranges from 3.5 to 5.0 μm. The MDt of the toner particles and the volume-average particle diameter of the carrier particles MDc are at a specific ratio, and spherical fine toner particles in the toner particles and fine carrier particles in the carrier particles exist at specific percentages.
摘要翻译： 公开了含有调色剂颗粒和载体颗粒的双组分显影剂。 调色剂颗粒MDt的数均粒径为3.5-5.0μm。 调色剂颗粒的MDt和载体颗粒MDc的体积平均粒径为特定比例，并且调色剂颗粒中的球形微调色剂颗粒和载体颗粒中的细载体颗粒以特定百分比存在。
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9.发明申请Method to Achieve Tribocharge Uniformity of a Developer Mix Across Different Temperature and Humidity Conditions by Modifying the Surface of the Magnetic Carrier Particle 有权通过改变磁性载体颗粒的表面在不同温度和湿度条件下实现显影剂组合的摩擦匀速度的方法公开(公告)号：US20160179022A1
公开(公告)日：2016-06-23
申请号：US14580830
申请日：2014-12-23
发明人： Kasturi Rangan Srinivasan , Ligia Aura Bejat , Michael Anthony Blassingame , Rick Owen Jones , Brandon Michael Lin , James Craig Minor
CPC分类号： G03G9/1139 , G03G9/0804 , G03G9/0808 , G03G9/0815 , G03G9/0817 , G03G9/0819 , G03G9/0918 , G03G9/1075 , G03G9/1131 , G03G9/1132 , G03G9/1133 , G03G9/1134 , G03G9/1135 , G03G9/1136
摘要： A method for providing a developer mix having tribocharge uniformity across varying temperature and humidity conditions is provided. A developer mix used in a dual component development (DCD) system typically is a mixture of toner particles and magnetic carrier particles. Tribocharge uniformity is achieved in the developer mix by performing the step of treating the surface of the magnetic carrier particles with surface additives before the magnetic carrier particles are mixed with the toner particles. Surface additives include but are not limited to silica, titania and alumina.
摘要翻译： 提供了一种在不同的温度和湿度条件下提供具有摩擦放电一致性的显影剂混合物的方法。 用于双组分显影（DCD）系统的显影剂混合物通常是调色剂颗粒和磁性载体颗粒的混合物。 通过在磁性载体颗粒与调色剂颗粒混合之前执行用表面添加剂处理磁性载体颗粒的表面的步骤，在显影剂混合物中实现摩擦带电均匀性。 表面添加剂包括但不限于二氧化硅，二氧化钛和氧化铝。
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10.发明申请ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE 有权静电充电图像发生器，静电充电图像开发和调色剂盒公开(公告)号：US20150370187A1
公开(公告)日：2015-12-24
申请号：US14507441
申请日：2014-10-06
申请人： FUJI XEROX CO., LTD.
CPC分类号： G03G9/08755 , G03G9/0819 , G03G9/0827 , G03G9/08782 , G03G9/08795 , G03G9/08797 , G03G9/1132 , G03G9/1139
摘要： An electrostatic charge image developing toner includes a binder resin containing a polyester resin, a release agent, a colorant, and an aromatic aldehyde compound, the content of which exceeds 100 ppm and is equal to or smaller than 1200 ppm.
摘要翻译： 静电荷图像显影调色剂包括含有聚酯树脂，脱模剂，着色剂和芳族醛化合物的粘合剂树脂，其含量超过100ppm且等于或小于1200ppm。
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