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1. 发明申请

US20210325799A1 IMAGING SYSTEM 有权
公开(公告)号：US20210325799A1
公开(公告)日：2021-10-21
申请号：US17269447
申请日：2019-08-26
申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
发明人： Hiroaki YOSHIDA
IPC分类号： G03G15/08 , G03G9/10
摘要： An imaging system includes a storage container, a separating device and a restoring device. The storage container stores a developer including carrier and toner having restoring properties. The separating device separates the developer in the storage container into the carrier and the toner. The restoring device restores properties of the carrier and the toner generated by the separating device.

2. 发明授权

US11016405B2 Electrophotograph toner 有权
公开(公告)号：US11016405B2
公开(公告)日：2021-05-25
申请号：US16844543
申请日：2020-04-09
申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
发明人： Jin-mo Hong
IPC分类号： G03G9/09 , G03G9/087 , G03G9/10 , G03G9/097
摘要： A toner for electrophotography includes a toner particle including a binder resin, a colorant, and a releasing agent, and an additive material including a quantum dot-inorganic particle composite. The additive material is attached to an external surface of the toner particle. The quantum dot-inorganic particle composite includes quantum dot particles and inorganic particles present between the quantum dot particles.

3. 发明授权

US10698330B2 Carrier core material and electrophotographic development carrier using same and electrophotographic developer 有权
公开(公告)号：US10698330B2
公开(公告)日：2020-06-30
申请号：US16080062
申请日：2017-03-28
申请人： DOWA ELECTRONICS MATERIALS CO., LTD. , DOWA IP CREATION CO., LTD.
发明人： Yuki Kitahara , Shou Ogawa
IPC分类号： G03G9/10 , G03G9/107 , G03G9/113 , C01G49/00 , G03G13/06
摘要： A carrier core material formed with ferrite particles, the skewness Rsk of the particle is equal to or more than −0.40 but equal to or less than −0.20, and the kurtosis Rku of the particle is equal to or more than 3.20 but equal to or less than 3.50. Here, the maximum height Rz of the particle is equal to or more than 2.20 μm but equal to or less than 3.50 μm. Moreover, the ferrite particle contains at least either of Mn and Mg elements. In this way, cracking or chipping in a concave-convex portion of a particle surface is unlikely to occur, and moreover, the amount of coating resin used can be reduced without properties such as electrical resistance being lowered.

4. 发明授权

US10514652B2 Image forming apparatus and developer set 有权
公开(公告)号：US10514652B2
公开(公告)日：2019-12-24
申请号：US16296174
申请日：2019-03-07
申请人： FUJI XEROX CO., LTD.
发明人： Shintaro Anno , Hiroaki Saijo , Takuro Watanabe , Yasuaki Hashimoto , Fusako Kiyono
IPC分类号： G03G15/08 , G03G21/00 , G03G9/113 , G03G15/00 , G03G9/087 , G03G9/09 , G03G9/10 , G03G9/107
摘要： A developer set includes a first developer and a second developer. The first developer includes a first toner and a first carrier. The second developer includes a second toner and a second carrier. The second toner is a toner that includes a flaky brilliant pigment, a toner that includes a white pigment, or a transparent toner. The second carrier has a higher volume resistivity than the first carrier and has a larger volume average particle diameter than the first carrier.

5. 发明授权

US09952524B2 Magnetic carrier for electrophotographic developer and process for producing the same, and two-component system developer 有权
公开(公告)号：US09952524B2
公开(公告)日：2018-04-24
申请号：US14404543
申请日：2013-05-30
申请人： TODA KOGYO CORP.
发明人： Kaori Kinoshita , Eiichi Kurita
IPC分类号： G03G9/113 , G03G9/107 , G03G9/10
CPC分类号： G03G9/1135 , G03G9/10 , G03G9/107 , G03G9/1075 , G03G9/1131 , G03G9/1133 , G03G9/1136
摘要： The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical composite core particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin, and having an average particle diameter of 20 to 60 μm, the magnetic carrier for an electrophotographic developer satisfying the formula (1): σ1−σ0=−2 to 0 wherein σ0 represents a saturation magnetization (Am2/kg) of the carrier particles having a particle diameter in the vicinity of the average particle diameter of the magnetic carrier for an electrophotographic developer; and σ1 represents a saturation magnetization (Am2/kg) of the carrier particles having a particle diameter of less than 20 μm, and a two-component system developer using the magnetic carrier. The two-component system developer of the present invention includes a magnetic carrier used for an electrophotographic developer which can exhibit a good durability, is free from occurrence of carrier adhesion, and can maintain a high quality of images produced for a long period of time, and comprises the magnetic carrier for an electrophotographic developer and a toner.

6. 发明授权

US09588453B2 Resin-filled ferrite carrier for electrophotographic developer and electrophotographic developer using the ferrite carrier 有权
标题翻译：用于电子照相显影剂的树脂填充铁氧体载体和使用铁素体载体的电子照相显影剂
公开(公告)号：US09588453B2
公开(公告)日：2017-03-07
申请号：US14673557
申请日：2015-03-30
申请人： POWDERTECH CO., LTD.
发明人： Hiroki Sawamoto , Takao Sugiura
IPC分类号： G03G9/113 , G03G9/10 , G03G9/107
CPC分类号： G03G9/10 , G03G9/1075 , G03G9/113 , G03G9/1131 , G03G9/1136 , G03G9/1138
摘要： There is provided a resin-filled ferrite carrier for an electrophotographic developer, in which a void of a porous ferrite particle used as a ferrite carrier core material is filled with silicone resin, wherein a true specific gravity (Y) of the porous ferrite particle filled with the silicone resin and a Si/Fe value (X) measured by fluorescent X-ray elemental analysis satisfy the following inequality (1): −350X≦Y−4.83≦−100X (1).
摘要翻译：提供一种用于电子照相显影剂的树脂填充铁氧体载体，其中用作铁氧体载体芯材料的多孔铁氧体颗粒的空隙填充有硅树脂，其中填充的多孔铁氧体颗粒的真比重（Y）与硅树脂和通过荧光X射线元素分析测得的Si / Fe值（X）满足以下不等式（1）： - 350 ¢X‰¤Y - 4.83‰¤ - 100 ¢X

7. 发明授权

US09429862B2 Carrier for electrophotographic developer and electrophotographic developer 有权
标题翻译：用于电子照相显影剂和电子照相显影剂
公开(公告)号：US09429862B2
公开(公告)日：2016-08-30
申请号：US14884862
申请日：2015-10-16
申请人： DOWA ELECTRONICS MATERIALS CO., LTD. , DOWA IP CREATION CO., LTD.
发明人： Takeshi Kawauchi
IPC分类号： G03G9/107 , G03G9/113 , G03G9/08 , G03G9/10
CPC分类号： G03G9/107 , G03G9/0812 , G03G9/0819 , G03G9/10 , G03G9/1075 , G03G9/113 , G03G9/1131 , G03G9/1132
摘要： A method for manufacturing carrier core particles for electrophotographic developer that include manganese, magnesium, and iron as a core composition. The method includes a granulation step (A) of granulating a mixture of raw materials containing manganese, magnesium, and iron with a reducing agent added at a ratio of 0.10% to 1.00% by mass to a total mass of the raw materials containing manganese, magnesium, and iron, and a firing step of firing the granular material granulated in the granulation step. The firing step includes a first heating step (C) of applying heat at a constant temperature ranging from 500° C. to 800° C. in an atmosphere with an oxygen concentration of 1000 ppm to 15000 ppm for a predetermined period of time and a second heating step (D) of applying heat at a temperature higher than 800° C. for a predetermined period of time after the first heating step.
摘要翻译：一种用于制造包含锰，镁和铁作为芯组合物的电子照相显影剂用载体芯颗粒的方法。该方法包括将含有锰，镁和铁的原料的混合物与以含有锰的原料的总质量相对于0.10质量％至1.00质量％的比例添加的还原剂的造粒步骤（A）镁和铁，以及烧成在造粒工序中造粒的粒状物的烧成工序。烧成工序包括在氧浓度为1000ppm〜15000ppm的气氛中，在规定时间内在500〜800℃的恒定温度下进行加热的第一加热工序（C），第二加热步骤（D），其在高于800℃的温度下在第一加热步骤之后的预定时间段内进行加热。

8. 发明授权

US09329514B2 Carrier core particle for electrophotographic developer, method for manufacturing the same, carrier for electrophotographic developer and electrophotographic developer 有权
标题翻译：用于电子照相显影剂的载体芯颗粒，其制造方法，用于电子照相显影剂和电子照相显影剂的载体
公开(公告)号：US09329514B2
公开(公告)日：2016-05-03
申请号：US14496263
申请日：2014-09-25
申请人： DOWA ELECTRONICS MATERIALS CO., LTD. , DOWA IP CREATION CO., LTD.
发明人： Takeshi Kawauchi , Sho Ogawa
IPC分类号： G03G9/10 , G03G9/107 , G03G9/113 , C01G49/00
CPC分类号： G03G9/1075 , C01G49/0072 , C01P2006/40 , C01P2006/42 , C01P2006/90 , G03G9/107 , G03G9/113
摘要： A carrier core particle for an electrophotographic developer includes a composition expressed by a general formula: MnxFe3−xO4+y (0
摘要翻译：用于电子照相显影剂的载体芯颗粒包括由以下通式表示的组成：Mn x Fe 3-x O 4 + y（0

9. 发明授权

US09268246B2 Method for manufacturing carrier core particles for electrophotographic developer, carrier core particles for electrophotographic developer, carrier for electrophotographic developer, and electrophotographic developer 有权
标题翻译：用于电子照相显影剂载体芯颗粒的制造方法，用于电子照相显影剂的载体芯颗粒，用于电子照相显影剂的载体和电子照相
公开(公告)号：US09268246B2
公开(公告)日：2016-02-23
申请号：US14184848
申请日：2014-02-20
申请人： DOWA ELECTRONICS MATERIALS CO., LTD. , DOWA IP CREATION CO., LTD.
发明人： Takeshi Kawauchi , Sho Ogawa , Haruka Seki
IPC分类号： G03G9/107 , C04B35/26 , G03G9/10 , G03G9/113
CPC分类号： G03G9/107 , C01G49/0072 , C01P2002/50 , C01P2002/52 , C01P2004/32 , C01P2006/12 , C01P2006/42 , C04B35/26 , C04B35/2633 , C04B35/62695 , C04B2235/3208 , C04B2235/3213 , C04B2235/3262 , G03G9/10 , G03G9/1132
摘要： Provided is a method for manufacturing carrier core particles for electrophotographic developer capable of stably maintaining high chargeability over a long time. The method for manufacturing carrier core particles includes a granulation step of granulating a mixture of raw materials containing manganese, iron, strontium, and calcium and a firing step of firing the mixture granulated in the granulation step. The firing step includes a heating process of heating the granular mixture with an increase in temperature to a predetermined degree and a cooling process of cooling the granular mixture, after the heating process, in an atmosphere with an oxygen concentration ranging from 5000 ppm to 20000 ppm. The molar ratio of the sum of strontium and calcium to the sum of the manganese, iron, strontium, and calcium is 0.0026 to 0.013.
摘要翻译：提供一种用于制造能够长时间稳定地保持高带电性的电子照相显影剂的载体芯颗粒的制造方法。制造载体芯颗粒的方法包括造粒步骤，其对含有锰，铁，锶和钙的原料的混合物进行造粒，并且在造粒步骤中烧制混合物的烧成步骤。烧成工序包括：在氧化浓度为5000ppm〜20000ppm的气氛中，将加热后的粒状混合物在温度上升到规定的程度的加热处理和冷却加热后的粒状混合物的冷却工序。锶和钙之和与锰，铁，锶和钙之和的摩尔比为0.0026至0.013。

10. 发明申请

US20160033889A1 CARRIER CORE PARTICLES FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER 审中-公开
标题翻译：电子显影开发商的载体芯片，电子显影开发商的承运人和电子照相开发商
公开(公告)号：US20160033889A1
公开(公告)日：2016-02-04
申请号：US14884862
申请日：2015-10-16
申请人： DOWA ELECTRONICS MATERIALS CO., LTD. , DOWA IP CREATION CO., LTD.
发明人： Takeshi KAWAUCHI
IPC分类号： G03G9/113 , G03G9/08 , G03G9/10
CPC分类号： G03G9/107 , G03G9/0812 , G03G9/0819 , G03G9/10 , G03G9/1075 , G03G9/113 , G03G9/1131 , G03G9/1132
摘要： A method for manufacturing carrier core particles for electrophotographic developer that include manganese, magnesium, and iron as a core composition. The method includes a granulation step (A) of granulating a mixture of raw materials containing manganese, magnesium, and iron with a reducing agent added at a ratio of 0.10% to 1.00% by mass to a total mass of the raw materials containing manganese, magnesium, and iron, and a firing step of firing the granular material granulated in the granulation step. The firing step includes a first heating step (C) of applying heat at a constant temperature ranging from 500° C. to 800° C. in an atmosphere with an oxygen concentration of 1000 ppm to 15000 ppm for a predetermined period of time and a second heating step (D) of applying heat at a temperature higher than 800° C. for a predetermined period of time after the first heating step.
摘要翻译：一种用于制造包含锰，镁和铁作为芯组合物的电子照相显影剂用载体芯颗粒的方法。该方法包括将含有锰，镁和铁的原料的混合物与以含有锰的原料的总质量相对于0.10质量％至1.00质量％的比例添加的还原剂的造粒步骤（A）镁和铁，以及烧成在造粒工序中造粒的粒状物的烧成工序。烧成工序包括在氧浓度为1000ppm〜15000ppm的气氛中，在规定时间内在500〜800℃的恒定温度下进行加热的第一加热工序（C），第二加热步骤（D），其在高于800℃的温度下在第一加热步骤之后的预定时间段内进行加热。

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