公开(公告)号：US09034551B2

公开(公告)日：2015-05-19

申请号：US12864447

申请日：2009-03-10

Applicant: Tomoko Endo ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba

Inventor： Tomoko Endo ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba

IPC: G03G9/107 ,  G03G9/08 ,  G03G9/10 ,  G03G9/113

CPC classification number: G03G9/107 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/10 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1133

Abstract: Provided is a two-component developer containing: a magnetic carrier obtained by coating a magnetic core with a resin; and toner, in which: the magnetic core contains at least a ferrite component and at least one kind of an oxide selected from the group consisting of SiO2 and Al2O3; the content of the oxide is 4.0 mass % or more and 40.0 mass % or less with respect to the magnetic core; the magnetic core has a specific resistance of 5.0×104 Ω·cm or more and 5.0×108 Ω·cm or less at the time of the application of 1,000 V/cm; the magnetic carrier has an intensity of magnetization in 79.6 kA/m of 40.0 Am2/kg or more and 65.0 Am2/kg or less, and a residual magnetization after the application of an external magnetic field of 79.6 kA/m of 3.0 Am2/kg or less; and the toner has a weight-average particle diameter (D4) of 3.0 μm or more and 10.0 μm or less and an average circularity of 0.940 or more and 0.990 or less.

Abstract translation: 提供了一种双组分显影剂，其包含：通过用树脂涂覆磁芯获得的磁性载体; 和调色剂，其中：所述磁芯至少包含铁氧体组分和至少一种选自SiO 2和Al 2 O 3的氧化物; 相对于磁芯，氧化物的含量为4.0质量％以上且40质量％以下。 磁芯在施加1000V / cm时的电阻率为5.0×104＆OHgr·cm以上5.0×10 8Ω·cm·cm以下。 磁性载体的强度为79.6kA / m，为40.0Am 2 / kg以上且65.0Am 2 / kg以下，在施加79.6kA / m 3的外部磁场后的剩余磁化强度为3.0Am 2 / kg 或更少; 调色剂的重均粒径（D4）为3.0μm以上且10.0μm以下，平均圆形度为0.940以上且0.990以下。

公开(公告)号：US08722303B2

公开(公告)日：2014-05-13

申请号：US13594118

申请日：2012-08-24

Applicant: Juun Horie ,  Takeshi Yamamoto ,  Yoshinobu Baba ,  Koh Ishigami

Inventor： Juun Horie ,  Takeshi Yamamoto ,  Yoshinobu Baba ,  Koh Ishigami

IPC: G03G9/08

CPC classification number: G03G9/113 ,  G03G9/107 ,  G03G9/1075 ,  G03G15/065

Abstract: 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.

Abstract translation: 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：US08298742B2

公开(公告)日：2012-10-30

申请号：US12741298

申请日：2008-12-18

Applicant: Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

Inventor： Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

IPC: G03G9/10

CPC classification number: G03G9/1131 ,  G03G9/1075 ,  G03G9/1132

Abstract: In a method for coating electrophotographic carrier core surfaces with a resin composition by rotating a rotator having a plurality of agitating blades on its surface in a casing; a coating treatment material that is introduced to a space defined between the rotator and the casing is in a packing of from 50% to 98% by volume; at the time of coating treatment, the electrophotographic carrier core surfaces are coat-treated with the resin composition while being put forward and put backward; and the electrophotographic carrier cores and the resin composition are, at the time of coating treatment, temperature-controlled at a specific temperature T (° C.) or below. This method enables the electrophotographic carrier core surfaces to be more uniformly coated with a coating resin.

Abstract translation: 在通过在壳体的表面上旋转具有多个搅拌叶片的旋转体的用树脂组合物涂布电子摄影载体芯表面的方法中， 引入到旋转体和壳体之间的空间的涂布处理材料的填充量为50体积％至98体积％ 在涂布处理时，将电子照相载体芯表面与树脂组合物进行涂布处理并向后放置; 并且电子照相载体芯和树脂组合物在涂布处理时在特定温度T（℃）或更低温度下进行温度控制。 该方法能够使电子照相载体芯表面更均匀地涂覆有涂覆树脂。

公开(公告)号：US20110143277A1

公开(公告)日：2011-06-16

申请号：US12965677

申请日：2010-12-10

Applicant: Yoshiaki Shiotari ,  Kosuke Fukudome ,  Nozomu Komatsu ,  Kunihiko Nakamura ,  Kentaro Kamae ,  Hiroyuki Fujikawa ,  Koh Ishigami ,  Takayuki Itakura ,  Hironori Minagawa

Inventor： Yoshiaki Shiotari ,  Kosuke Fukudome ,  Nozomu Komatsu ,  Kunihiko Nakamura ,  Kentaro Kamae ,  Hiroyuki Fujikawa ,  Koh Ishigami ,  Takayuki Itakura ,  Hironori Minagawa

IPC: G03G9/08 ,  G03G21/00

CPC classification number: G03G9/0819 ,  G03G9/0815 ,  G03G9/0817 ,  G03G9/0821 ,  G03G9/0827

Abstract: It is an object of the present invention to provide a toner having the transfer efficiency and the cleanability in combination, exhibiting excellent stress resistance, and ensuring the low-temperature fixing.A toner characterized in that the average circularity of the above-described toner is 0.960 or more, and 0.985 or less, where the average circularity is analyzed by dividing particles having a circle equivalent diameter of 1.98 μm or more, and 200.00 μm or less, the number A of toners having a circularity of 0.990 or more, and 1.000 or less is 25.0 percent by the number or less, and the percentage of the number of particles B having a circle equivalent diameter of 0.50 μm or more, and 1.98 μm or less relative to the total particles of 0.50 μm or more, and 200.00 μm or less is 10.0 percent by the number or less.

Abstract translation: 本发明的目的是提供具有转印效率和可清洁性的组合的显影优异的耐压性和确保低温定影的调色剂。 一种调色剂，其特征在于，上述调色剂的平均圆形度为0.960以上且0.985以下，通过将圆当量直径为1.98μm以上，200.00μm以下的颗粒除以平均圆形度， 圆形度为0.990以上，1.000以下的调色剂的A号为25.0以下，圆当量直径为0.50μm以上的粒子B的数量为1.98μm， 相对于0.50μm以上的总颗粒较少，并且200.00μm以下的值为10.0％以下。

公开(公告)号：US07927775B2

公开(公告)日：2011-04-19

申请号：US12691057

申请日：2010-01-21

Applicant: Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

Inventor： Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

IPC: G03G9/00

CPC classification number: G03G9/0821 ,  G03G9/0819 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1132 ,  G03G9/1136

Abstract: Provided is a magnetic carrier giving a high quality image free of density variation without the occurrence of fogging or carrier adhesion and having excellent dot reproducibility even during long-term use. The magnetic carrier has magnetic carrier particles produced by filling pores of porous magnetic core particles with a resin. The magnetic carrier contains 80% by number or more of the magnetic carrier particles satisfying the specific conditions (a) and (b) when 18 straight lines passing through a reference point of a cross section of the magnetic carrier particle are drawn at intervals of 10° in a reflected electron image of the cross section of the magnetic carrier particle photographed by a scanning electron microscope.

Abstract translation: 本发明提供了一种磁性载体，其具有无密度变化的高质量图像，而不会发生起雾或载体粘附，并且即使在长期使用中也具有优异的点再现性。 磁性载体具有通过用树脂填充多孔磁性核颗粒的孔而产生的磁性载体颗粒。 磁性载体含有80个数量以上的满足特定条件（a）和（b）的磁性载体颗粒，当通过磁性载体颗粒的横截面的参考点的18条直线以10° 在通过扫描电子显微镜拍摄的磁性载体颗粒的横截面的反射电子图像中，

公开(公告)号：US20100279224A1

公开(公告)日：2010-11-04

申请号：US12741298

申请日：2008-12-18

Applicant: Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

Inventor： Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

IPC: G03G9/10

CPC classification number: G03G9/1131 ,  G03G9/1075 ,  G03G9/1132

Abstract: In a method for coating electrophotographic carrier core surfaces with a resin composition by rotating a rotator having a plurality of agitating blades on its surface in a casing; a coating treatment material that is introduced to a space defined between the rotator and the casing is in a packing of from 50% to 98% by volume; at the time of coating treatment, the electrophotographic carrier core surfaces are coat-treated with the resin composition while being put forward and put backward; and the electrophotographic carrier cores and the resin composition are, at the time of coating treatment, temperature-controlled at a specific temperature T (° C.) or below. This method enables the electrophotographic carrier core surfaces to be more uniformly coated with a coating resin.

Abstract translation: 在通过在壳体的表面上旋转具有多个搅拌叶片的旋转体的用树脂组合物涂布电子摄影载体芯表面的方法中， 引入到旋转体和壳体之间的空间的涂布处理材料的填充量为50体积％至98体积％ 在涂布处理时，将电子照相载体芯表面与树脂组合物进行涂布处理并向后放置; 并且电子照相载体芯和树脂组合物在涂布处理时在特定温度T（℃）或更低温度下进行温度控制。 该方法能够使电子照相载体芯表面更均匀地涂覆有涂覆树脂。

公开(公告)号：US20100119968A1

公开(公告)日：2010-05-13

申请号：US12691057

申请日：2010-01-21

Applicant: Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

Inventor： Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

IPC: G03G9/107

CPC classification number: G03G9/0821 ,  G03G9/0819 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1132 ,  G03G9/1136

Abstract: Provided is a magnetic carrier giving a high quality image free of density variation without the occurrence of fogging or carrier adhesion and having excellent dot reproducibility even during long-term use. The magnetic carrier has magnetic carrier particles produced by filling pores of porous magnetic core particles with a resin. The magnetic carrier contains 80% by number or more of the magnetic carrier particles satisfying the specific conditions (a) and (b) when 18 straight lines passing through a reference point of a cross section of the magnetic carrier particle are drawn at intervals of 10° in a reflected electron image of the cross section of the magnetic carrier particle photographed by a scanning electron microscope.

Abstract translation: 本发明提供了一种磁性载体，其具有无密度变化的高质量图像，而不会发生起雾或载体粘附，并且即使在长期使用中也具有优异的点再现性。 磁性载体具有通过用树脂填充多孔磁性核颗粒的孔而产生的磁性载体颗粒。 磁性载体含有80个数量以上的满足特定条件（a）和（b）的磁性载体颗粒，当通过磁性载体颗粒的横截面的参考点的18条直线以10° 在通过扫描电子显微镜拍摄的磁性载体颗粒的横截面的反射电子图像中，

公开(公告)号：US20090047592A1

公开(公告)日：2009-02-19

申请号：US11841078

申请日：2007-08-20

Applicant: Naoki Okamoto ,  Tetsuya Ida ,  Koh Ishigami ,  Kazuo Terauchi ,  Yojiro Hotta ,  Noriyoshi Umeda ,  Yoshinobu Baba ,  Takayuki Itakura

Inventor： Naoki Okamoto ,  Tetsuya Ida ,  Koh Ishigami ,  Kazuo Terauchi ,  Yojiro Hotta ,  Noriyoshi Umeda ,  Yoshinobu Baba ,  Takayuki Itakura

IPC: G03G9/087 ,  G03G9/09 ,  G03G9/08

CPC classification number: G03G9/08795 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08793 ,  G03G9/08797

Abstract: An object of the present invention is to provide a toner which: is excellent in fixing ability such as low-temperature fixability, hot offset property, and separability even in a fixing system excellent in quick start property and energy saving property; has high gloss; and is excellent in development stability and transferability irrespective of environments. The toner of the present invention includes toner particles each containing at least a binder resin and a colorant, in which, in a case where a tetrahydrofuran (THF) insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 2 hours is represented by A (mass %), a THF insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 4 hours is represented by B (mass %), a THF insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 8 hours is represented by C (mass %), and a THF insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 16 hours is represented by D (mass %), A, B, C, and D satisfy the following expression: (A−B)/2>(B−C)/4>(C−D)/8 where 40

Abstract translation: 本发明的目的是提供即使在快速起动性和节能性优异的定影系统中也具有低温定影性，热偏移性和分离性等定影性优异的调色剂; 具有高光泽度 并且不论环境如何，都具有良好的显影稳定性和转印性。 本发明的调色剂包括各自至少含有粘合剂树脂和着色剂的调色剂颗粒，其中当将调色剂中的调色剂中的粘合剂树脂的四氢呋喃（THF）不溶物质进行索格利特萃取时， 2小时的THF表示为A（质量％），当调色剂用THF进行索格利特萃取4小时时，调色剂中粘合剂树脂的THF不溶物质为B（质量％），THF不溶物 当调色剂用THF进行索格利特萃取8小时时，调色剂中的粘合剂树脂的调色剂以C（质量％）表示，调色剂中的粘合剂树脂的THF不溶性物质在调色剂中进行索格利特萃取时， THF为16小时由D（质量％）表示，A，B，C和D满足下列表达式：（AB）/ 2>（BC）/ 4>（CD）/ 8其中40

公开(公告)号：US07396626B2

公开(公告)日：2008-07-08

申请号：US11225064

申请日：2005-09-14

Applicant: Hiroyuki Fujikawa ,  Nobuyoshi Sugahara ,  Takayuki Itakura ,  Naoki Okamoto ,  Koh Ishigami ,  Yoshinobu Baba ,  Hirohide Tanikawa

Inventor： Hiroyuki Fujikawa ,  Nobuyoshi Sugahara ,  Takayuki Itakura ,  Naoki Okamoto ,  Koh Ishigami ,  Yoshinobu Baba ,  Hirohide Tanikawa

IPC: G03G9/087

CPC classification number: G03G9/08755 ,  G03G9/08797 ,  G03G9/09708 ,  G03G9/09725

Abstract: The present invention provides a toner improved in dispersibility of a colorant in the toner particles and excellent in the color reproducibility including color mixability and transparency. The toner is also excellent in the stability in long-term of the chargeability and capable of forming images maintaining high image quality. The present invention provides a toner for forming a full-color image which includes at least toner particles containing a binder resin, a colorant and a wax, and inorganic fine particles, wherein the binder resin comprises a resin having polyester units which is synthesized by use of an aromatic carboxylic acid titanium compound as a catalyst, and the inorganic fine particles comprise fine titanium oxide particles.

Abstract translation: 本发明提供一种改善着色剂在调色剂颗粒中的分散性的调色剂，并且颜色再现性优异，包括颜色混合性和透明度。 调色剂在充电性的长期稳定性方面也是优异的，并且能够形成保持高图像质量的图像。 本发明提供一种用于形成全色图像的调色剂，其至少包括含有粘合剂树脂，着色剂和蜡的调色剂颗粒和无机细颗粒，其中粘合剂树脂包括通过使用合成的具有聚酯单元的树脂 的芳族羧酸钛化合物作为催化剂，无机细颗粒包含细小的氧化钛颗粒。

公开(公告)号：US07381515B2

公开(公告)日：2008-06-03

申请号：US11107736

申请日：2005-04-18

Applicant: Nobuyoshi Sugahara ,  Hiroyuki Fujikawa ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba ,  Takayuki Itakura

Inventor： Nobuyoshi Sugahara ,  Hiroyuki Fujikawa ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba ,  Takayuki Itakura

IPC: G03G13/16

CPC classification number: G03G15/161 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0827 ,  G03G15/162

Abstract: In an image forming method having primarily transferring step for transferring to an intermediate transfer member a toner image formed on a photosensitive member, secondarily transferring step for transferring to a transfer material the toner image held on the intermediate transfer member, and, after the secondary transferring step, cleaning step for removing the toner remaining on the intermediate transfer member by bringing a cleaning means into contact with the intermediate transfer member, the cleaning means is a fur brush or a charging roller, and the intermediate transfer member has a specific maximum displacement quantity (Sb) and has a specific elastic deformation percentage (Eb) (%); a toner which forms the toner image has a specific average circularity, has a specific maximum displacement quantity (St), and has a specific elastic deformation percentage (Et) (%); and the elastic deformation percentage of the intermediate transfer member and the elastic deformation percentage of the toner satisfy the following conditional expression: 75≦Eb+Et≦135.

Abstract translation: 在一种图像形成方法中，主要传送步骤用于转印到中间转印部件上，形成在感光部件上的调色剂图像，二次转印步骤，用于转印到转印材料上，保持在中间转印部件上的调色剂图像，以及二次转印 通过使清洁装置与中间转印部件接触来除去残留在中间转印部件上的调色剂的清洁步骤，清洁装置是毛刷或充电辊，并且中间转印部件具有特定的最大位移量 （Sb），具有比弹性变形率（Eb）（％）。 形成调色剂图像的调色剂具有特定的平均圆形度，具有特定的最大位移量（St），并且具有特定的弹性变形百分比（Et）（％）; 并且中间转印部件的弹性变形百分比和调色剂的弹性变形百分比满足以下条件表达式：<？in-line-formula description =“In-line formula”end =“lead”？> 75 <= Eb + Et <= 135。<？in-line-formula description =“In-line Formulas”end =“tail”？>