公开(公告)号：US20110024669A1

公开(公告)日：2011-02-03

申请号：US12899957

申请日：2010-10-07

申请人： Takeshi Naka ,  Yoshinobu Baba ,  Koh Ishigami ,  Yoshiaki Shiotari ,  Kentaro Kamae

发明人： Takeshi Naka ,  Yoshinobu Baba ,  Koh Ishigami ,  Yoshiaki Shiotari ,  Kentaro Kamae

IPC分类号： B05D5/12 ,  H01F1/26

CPC分类号： G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1132 ,  G03G9/1135

摘要： When a surface of magnetic carrier core particles is coated with coating resin composition particles, the coating is conducted so that a surface of the magnetic carrier is free from cracks and chips and has fewer residual resin composition particles and a coating is uniform. In the method, a rotor having a plurality of stirring members on a surface thereof is rotated to coat the surface of magnetic carrier core particles with the resin composition particles. When the coating is conducted, while repeatedly conducting transportation in a direction of a driver and transportation in an anti-driver direction, the surface of the magnetic carrier core particles is coated with the resin composition. The resin composition particles has a 50% particle diameter (D50) based on volume of 0.2 μm or more to 6.0 μm or less and the proportion of particles of 10.0 μm or more is 2.0% by volume or less.

摘要翻译： 当磁性载体芯颗粒的表面涂覆有涂覆树脂组合物颗粒时，进行涂层，使得磁性载体的表面没有裂纹和碎屑，并且具有更少的残留树脂组合物颗粒和涂层是均匀的。 在该方法中，使表面上具有多个搅拌部件的转子旋转，从而将树脂组合物粒子的磁性载体芯粒子的表面涂布。 当进行涂层时，在沿着驾驶员的方向反复进行输送并沿反向驱动方向运送的同时，用该树脂组合物涂覆磁性载体芯颗粒的表面。 树脂组合物颗粒的体积为0.2μm以上至6.0μm以下的粒径为50％（D50），10.0μm以上的粒子的比例为2.0体积％以下。

公开(公告)号：US20100159382A1

公开(公告)日：2010-06-24

申请号：US12632563

申请日：2009-12-07

申请人： Juun Horie ,  Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Tomoaki Miyazawa ,  Hirokazu Usami ,  Yoshinobu Baba ,  Koh Ishigami ,  Kazuo Uchida ,  Katsuhiro Watanabe ,  Jumpei Shirono

发明人： Juun Horie ,  Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Tomoaki Miyazawa ,  Hirokazu Usami ,  Yoshinobu Baba ,  Koh Ishigami ,  Kazuo Uchida ,  Katsuhiro Watanabe ,  Jumpei Shirono

IPC分类号： G03G9/107 ,  G03G9/00 ,  G03G13/06

CPC分类号： G03G9/10 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1136

摘要： A carrier has an impedance Z having a frequency dependence, obtained by alternating current impedance measurement. When the frequency dependence is fitted by a fitting function, parameter α lies in a range of 0.70 to 0.90 in an electric field of 103 V/cm.

摘要翻译： 载体具有通过交流阻抗测量获得的具有频率依赖性的阻抗Z。 当通过拟合函数拟合频率依赖性时，在103V / cm的电场中，参数α在0.70〜0.90的范围内。

公开(公告)号：US20130244159A1

公开(公告)日：2013-09-19

申请号：US13988867

申请日：2011-11-24

申请人： Koh Ishigami ,  Nozomu Komatsu ,  Kentaro Kamae ,  Yoshinobu Baba

发明人： Koh Ishigami ,  Nozomu Komatsu ,  Kentaro Kamae ,  Yoshinobu Baba

IPC分类号： G03G9/083

CPC分类号： G03G9/0832 ,  G03G9/0827 ,  G03G9/1075 ,  G03G9/1131 ,  G03G9/1136

摘要： Provided is a two-component developer having excellent developing performance and little change in image concentration, and achieving long-term suppression of image defects such as transfer failure and fogging.Provided is a two-component developer containing a magnetic carrier and a toner, wherein the magnetic carrier has magnetic carrier particles comprising a silicone resin B coated on the surfaces of filled core particles in which pores of porous magnetic core particles are filled with a silicone resin A, the silicone resin A is a silicone resin cured in the presence of a non-metal catalyst or without a catalyst, while the silicone resin B is a silicone resin cured in the presence of a metal catalyst having titanium or zirconium, and the toner contains a binder resin, a release agent and a colorant, and has an average circularity of 0.940 or more.

摘要翻译： 提供了具有优异的显影性能和图像浓度变化小的双组分显影剂，并且实现了诸如转印失败和起雾的图像缺陷的长期抑制。 提供了含有磁性载体和调色剂的双组分显影剂，其中磁性载体具有磁性载体颗粒，其包含涂覆在填充芯颗粒表面上的硅树脂B，其中多孔磁性核颗粒的孔填充有硅树脂 A中，有机硅树脂A是在非金属催化剂或不含催化剂存在下固化的有机硅树脂，而有机硅树脂B是在具有钛或锆的金属催化剂存在下固化的有机硅树脂，并且调色剂 含有粘合剂树脂，脱模剂和着色剂，平均圆形度为0.940以上。

公开(公告)号：US08323726B2

公开(公告)日：2012-12-04

申请号：US12899957

申请日：2010-10-07

申请人： Takeshi Naka ,  Yoshinobu Baba ,  Koh Ishigami ,  Yoshiaki Shiotari ,  Kentaro Kamae

发明人： Takeshi Naka ,  Yoshinobu Baba ,  Koh Ishigami ,  Yoshiaki Shiotari ,  Kentaro Kamae

IPC分类号： B05D5/12

CPC分类号： G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1132 ,  G03G9/1135

摘要： When a surface of magnetic carrier core particles is coated with coating resin composition particles, the coating is conducted so that a surface of the magnetic carrier is free from cracks and chips and has fewer residual resin composition particles and a coating is uniform. In the method, a rotor having a plurality of stirring members on a surface thereof is rotated to coat the surface of magnetic carrier core particles with the resin composition particles. When the coating is conducted, while repeatedly conducting transportation in a direction of a driver and transportation in an anti-driver direction, the surface of the magnetic carrier core particles is coated with the resin composition. The resin composition particles has a 50% particle diameter (D50) based on volume of 0.2 μm or more to 6.0 μm or less and the proportion of particles of 10.0 μm or more is 2.0% by volume or less.

摘要翻译： 当磁性载体芯颗粒的表面涂覆有涂覆树脂组合物颗粒时，进行涂层，使得磁性载体的表面没有裂纹和碎屑，并且具有更少的残留树脂组合物颗粒和涂层是均匀的。 在该方法中，使表面上具有多个搅拌部件的转子旋转，从而将树脂组合物粒子的磁性载体芯粒子的表面涂布。 当进行涂层时，在沿着驾驶员的方向反复进行输送并沿反向驱动方向运送的同时，用该树脂组合物涂覆磁性载体芯颗粒的表面。 树脂组合物颗粒的体积为0.2μm以上至6.0μm以下的粒径为50％（D50），10.0μm以上的粒子的比例为2.0体积％以下。

公开(公告)号：US20120214097A1

公开(公告)日：2012-08-23

申请号：US13217216

申请日：2011-08-24

申请人： Takeshi Naka ,  Yoshinobu Baba ,  Koh Ishigami

发明人： Takeshi Naka ,  Yoshinobu Baba ,  Koh Ishigami

IPC分类号： G03G9/113

CPC分类号： G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1135 ,  G03G9/1138

摘要： Provided are a magnetic carrier and a two-component developer comprising the magnetic carrier. The magnetic carrier comprises magnetic carrier particles, each of which comprises a magnetic carrier core, the surface of which is coated with a charge control agent and further coated with a resin coat layer containing a resin composition.

摘要翻译： 提供了一种磁性载体和包含磁性载体的双组分显影剂。 磁性载体包括磁性载体颗粒，每个磁性载体颗粒包括磁性载体芯，其表面涂覆有电荷控制剂，并进一步涂覆有含有树脂组合物的树脂涂层。

公开(公告)号：US08722303B2

公开(公告)日：2014-05-13

申请号：US13594118

申请日：2012-08-24

申请人： Juun Horie ,  Takeshi Yamamoto ,  Yoshinobu Baba ,  Koh Ishigami

发明人： Juun Horie ,  Takeshi Yamamoto ,  Yoshinobu Baba ,  Koh Ishigami

IPC分类号： G03G9/08

CPC分类号： G03G9/113 ,  G03G9/107 ,  G03G9/1075 ,  G03G15/065

摘要： An image forming method using a two component developing system is provided in which a print speed is not less than 300 mm/s, a peak-to-peak voltage of an AC component in a developing bias is not more than 1.3 kV, a sufficient image density can be ensured, and a recorded image having a small amount of magnetic carrier remaining on the image and having high image quality can be obtained. A magnetic carrier that forms a two component developer contains a magnetic core and a resin. The magnetic core is a ferrite containing Sr and Ca inside thereof at the same time, having a small crystal grain diameter, a high density crystal-grain boundary structure, and an extremely large capacitance of the grain boundary. Use of the ferrite can provide the above method.

摘要翻译： 提供一种使用双组分显影系统的图像形成方法，其中打印速度不小于300mm / s，显影偏压中的AC分量的峰 - 峰电压不大于1.3kV，足够 可以确保图像浓度，并且可以获得具有保留在图像上并具有高图像质量的少量磁性载体的记录图像。 形成双组分显影剂的磁性载体含有磁芯和树脂。 磁芯是同时具有其中的Sr和Ca的铁素体，具有小的晶粒直径，高密度晶粒边界结构和极大的晶界电容。 使用铁氧体可以提供上述方法。

公开(公告)号：US20130052580A1

公开(公告)日：2013-02-28

申请号：US13594118

申请日：2012-08-24

申请人： Juun Horie ,  Takeshi Yamamoto ,  Yoshinobu Baba ,  Koh Ishigami

发明人： Juun Horie ,  Takeshi Yamamoto ,  Yoshinobu Baba ,  Koh Ishigami

IPC分类号： G03G13/08

CPC分类号： G03G9/113 ,  G03G9/107 ,  G03G9/1075 ,  G03G15/065

摘要： An image forming method using a two component developing system is provided in which a print speed is not less than 300 mm/s, a peak-to-peak voltage of an AC component in a developing bias is not more than 1.3 kV, a sufficient image density can be ensured, and a recorded image having a small amount of magnetic carrier remains on the image and having high image quality can be obtained. A magnetic carrier that forms a two component developer contains a magnetic core and a resin. The magnetic core is a ferrite containing Sr and Ca inside thereof at the same time, having a small crystal grain diameter, a high density crystal-grain boundary structure, and an extremely large capacitance of the grain boundary. Use of the ferrite can provide the above method.

摘要翻译： 提供一种使用双组分显影系统的图像形成方法，其中打印速度不小于300mm / s，显影偏压中的AC分量的峰 - 峰电压不大于1.3kV，足够 可以确保图像浓度，并且可以获得具有少量磁性载体的记录图像保留在图像上并且具有高图像质量。 形成双组分显影剂的磁性载体含有磁芯和树脂。 磁芯是同时具有其中的Sr和Ca的铁素体，具有小的晶粒直径，高密度晶粒边界结构和极大的晶界电容。 使用铁氧体可以提供上述方法。

公开(公告)号：US20100183971A1

公开(公告)日：2010-07-22

申请号：US12691063

申请日：2010-01-21

申请人： Hiroyuki Fujikawa ,  Koh Ishigami ,  Kunihiko Nakamura ,  Nozomu Komatsu ,  Yoshinobu Baba ,  Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo

发明人： Hiroyuki Fujikawa ,  Koh Ishigami ,  Kunihiko Nakamura ,  Nozomu Komatsu ,  Yoshinobu Baba ,  Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo

IPC分类号： G03G9/113 ,  G03G9/107 ,  G03G9/08 ,  G03G13/20

CPC分类号： G03G9/107 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/1131 ,  G03G9/1136

摘要： A magnetic carrier having magnetic carrier particles each containing at least a magnetic core particle and a resin; the magnetic carrier having a resistivity of from 1.0×106 Ω·cm or more to 1.0×1010 Ω·cm or less at an electric-field intensity of 1.0×103 V/cm as found by measuring dynamic impedance; electric-field intensity E(109) at which the resistivity of the magnetic carrier comes to 1.0×109 Ω·cm being 2.0×104 V/cm or less, and electric-field intensity E(108) at which the resistivity of the magnetic carrier comes to 1.0×108 Ω·cm being from 5.0×103 V/cm or more to 2.8×104 V/cm or less; and the electric-field intensity E(108) and the electric-field intensity E(109) being in a ratio, E(108)/E(109), of from 1.0 or more to 5.0 or less.

摘要翻译： 具有磁性载体颗粒的磁性载体，每个磁性载体颗粒至少含有磁芯颗粒和树脂; 磁性载体的电场强度为1.0×10 3 V / cm，电阻率为1.0×10 6Ω·cm·cm〜1.0×10 10Ω·cm·cm以下，通过测定动态阻抗; 磁性载体的电阻率为1.0×109Ω·cm·cm的电场强度E（109）为2.0×10 4 V / cm以下，电场强度E（108）为 磁载体为5.0×10 3 V / cm以上至2.8×10 4 V / cm以下的1.0×10 8Ω·cm·cm。 电场强度E（108）和电场强度E（109）的比例为E（108）/ E（109），为1.0以上且5.0以下。

公开(公告)号：US20080187338A1

公开(公告)日：2008-08-07

申请号：US12022575

申请日：2008-01-30

申请人： Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Yoshinobu Baba ,  Koh Ishigami

发明人： Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Yoshinobu Baba ,  Koh Ishigami

IPC分类号： G03G15/06

CPC分类号： G03G15/065 ,  G03G5/04 ,  G03G15/0806 ,  G03G15/5037 ,  G03G15/5062 ,  G03G2215/00037 ,  G03G2215/0607

摘要： An image forming apparatus, wherein the following formulae are satisfied: 0.22 ≤ ( M / S ) L ≤ 0.4 ,  ( Q M ) L = Vc ( Lt 2  ɛ 0  ɛ t + Ld ɛ 0  ɛ d ) × ( M S ) L ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 }  ( Lt 2  ɛ 0  ɛ t + Ld ɛ 0  ɛ d ) × ( M S ) L 500 ≤ αβ ≤ ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 }  ( Lt 2  ɛ 0  ɛ t + Ld ɛ 0  ɛ d ) × ( M S ) L 150 αβ ≥ ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } 150 where (M/S)L: a toner bearing amount in a maximum density image portion of a photosensitive drum, (Q/M)L: an average charge amount of the toner in the maximum density portion, Vc: an absolute value of a potential difference between a DC-component of a developing bias and the maximum density portion, Lt: a toner layer thickness of the maximum density portion, Ld: a drum thickness, εt: a relative permittivity of the toner layer, εd: a relative permittivity of the drum, ε0: a vacuum permittivity, Dtmax: a transmission density in a maximum density image portion on the paper after fixation, Dt0.1: a transmission density in an image on the paper when the toner bearing amount on the paper after fixation is 0.1 mg/cm2, and λ: a transfer efficiency of the toner, α = ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } ,  and   β = 1 / ( Q / M ) L .

公开(公告)号：US07244539B2

公开(公告)日：2007-07-17

申请号：US10834073

申请日：2004-04-29

申请人： Yoshinobu Baba ,  Ryoichi Fujita ,  Takaaki Kaya ,  Kazuo Terauchi

发明人： Yoshinobu Baba ,  Ryoichi Fujita ,  Takaaki Kaya ,  Kazuo Terauchi

IPC分类号： G03G9/113

CPC分类号： G03G9/1139 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/1134 ,  G03G9/1138

摘要： A magnetic carrier includes a magnetic material-dispersed resin core containing at least a magnetic material and a binder resin. The surface of the magnetic material-dispersed resin core is coated with a coating material containing at least a fluorine resin and 1 to 40 parts by weight of fine particles based on 100 parts by weight of the fluorine resin. The coating material is in an amount of 0.3 to 4.0 parts by weight based on 100 parts by weight of the magnetic material-dispersed resin core. The magnetic carrier has a contact angle of 95 to 125°. A two-component developer is also provided which makes use of the magnetic carrier.

摘要翻译： 磁性载体包括至少包含磁性材料和粘合剂树脂的磁性材料分散树脂芯。 基于100重量份的氟树脂，磁性材料分散树脂芯的表面涂覆有至少含有氟树脂的涂料和1至40重量份的微粒。 基于100重量份的磁性材料分散树脂核心，涂料的量为0.3〜4.0重量份。 磁性载体的接触角为95〜125°。 还提供了使用磁性载体的双组分显影剂。