公开(公告)号：US5202213A

公开(公告)日：1993-04-13

申请号：US823331

申请日：1992-01-21

申请人： Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

发明人： Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

IPC分类号： G03G9/097

CPC分类号： G03G9/09725

摘要： A developer for developing electrostatic latent images, comprising a mixture of toner and fine powder of silicic acid wherein the mixture has a ratio of B/A of 0.9 or larger provided that the mixture contains A wt. % thereof of the silicic acid fine powder, and contains B wt. % thereof of the silicic acid fine powder after the mixture has been passed through a 200 mesh-sieve.

摘要翻译： 用于显影静电潜像的显影剂，其包含调色剂和硅酸微粉的混合物，其中混合物的B / A比为0.9或更大，条件是混合物含有A wt。 ％的硅酸细粉末，含有Bwt。 该混合物已经通过200目筛后的硅酸细粉末的％。

公开(公告)号：US5014089A

公开(公告)日：1991-05-07

申请号：US528472

申请日：1990-05-25

申请人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Naoki Matsushige ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

发明人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Naoki Matsushige ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

IPC分类号： G03G9/083 ,  G03G9/08

CPC分类号： G03G9/0819 ,  Y10S430/104

摘要： A developer for developing electrostatic images, containing a magnetic toner having a binder resin and magnetic powder, the developer containing 17-60% by number of magnetic toner particles of 5 microns or smaller, containing 1-23% by number of magnetic toner particles of 8-12.7 microns, and containing 2.0% by volume or less of magnetic toner particles of 16 microns or larger; wherein the magnetic toner has a volume-average particle size of 4-9 microns, and the magnetic toner particles of 5 microns or smaller have a particle size distribution satisfying the following:N/V=-0.04N+k,wherein N denotes % by number of magnetic toner particles of 5 micron or smaller, V denotes % by volume of magnetic toner particles of 5 microns or smaller, k denotes a positive number of 4.5-6.5, and N denotes a positive number of 17-60.

公开(公告)号：US4999272A

公开(公告)日：1991-03-12

申请号：US398502

申请日：1989-08-25

申请人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

发明人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

IPC分类号： G03G5/06 ,  G03G9/08 ,  G03G13/09

CPC分类号： G03G13/09 ,  G03G5/06 ,  G03G9/0819 ,  Y10S430/104

摘要： An image forming method, comprising the steps of: providing an electrophotographic photosensitive member comprising an organic photoconductor, and a toner-carrying member carrying thereon a magnetic toner disposed opposite to the photosensitive member with a predetermined clearance in a developing region; the photosensitive member comprising at least two species of charge-generating substances and carrying thereon a digital and an analog electrostatic images; carrying the magnetic toner on the toner-carrying member to the developing region while regulating the magnetic toner so as to provide a thickness smaller than the clearance, the magnetic toner having a specific particle size distribution and a volume-average particle size of 4-10 microns; and developing the electrostatic images with the magnetic toner.

公开(公告)号：US4985327A

公开(公告)日：1991-01-15

申请号：US526680

申请日：1990-05-22

申请人： Kiichiro Sakashita ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Toshiaki Nakahara ,  Naoki Matsushige ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

发明人： Kiichiro Sakashita ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Toshiaki Nakahara ,  Naoki Matsushige ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

IPC分类号： G03G9/08 ,  G03G13/08

CPC分类号： G03G9/0819 ,  Y10S430/104

摘要： A developer for developing electrostatic images, comprising a non-magnetic toner, the toner containing 17-60% by number of non-magnetic toner particles of 5 microns or smaller, containing 1-30% by number of non-magnetic toner particles of 8-12.7 microns, and containing 2.0% by volume or less of nonmagnetic toner particles of 16 microns or larger; wherein the non-magnetic toner has a volume-average particle size of 4-10 microns, and the non-magnetic toner particles of 5 microns or smaller have a particle size distribution satisfying the following formula:N/V=-0.04N+k,wherein N denotes % by number of non-magnetic toner particles of 5 microns of smaller, V denotes % by volume of non-magnetic toner particles of 5 microns or smaller k denotes a positive number of 4.5-6.5, and N denotes a positive number of 17-60.

公开(公告)号：US4957840A

公开(公告)日：1990-09-18

申请号：US261987

申请日：1988-10-25

申请人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Naoki Matsushige ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

发明人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Naoki Matsushige ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

IPC分类号： G03G9/083 ,  G03G9/08

CPC分类号： G03G9/0819 ,  Y10S430/104

摘要： A developer for developing electrostatic images, comprising a magnetic toner comprising a binder resin and magnetic powder, the developer containing 17-60% by number of magnetic toner particles of 5 microns or smaller, containing 1-23% by number of magnetic toner particles of 8-12.7 microns, and containing 2.0% by volume or less of magnetic toner particles of 16 microns or larger; wherein the magnetic toner has a volume-average particle size of 4-9 microns, and the magnetic toner particles of 5 microns or smaller have a particle size distribution satisfying the following formula:N/V=-0.04N+k,wherein N denotes % by number of magnetic toner particles of 5 micron or smaller, V denotes % by volume of magnetic toner particles of 5 microns or smaller, k denotes a positive number of 4.5-6.5, and N denotes a positive number of 17-60.

公开(公告)号：US4952476A

公开(公告)日：1990-08-28

申请号：US313456

申请日：1989-02-22

申请人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida

发明人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/087

CPC分类号： G03G9/083 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08795 ,  Y10S430/104

摘要： A magnetic toner comprising a binder resin, magnetic powder and 0.1-10 wt. % (based on resin component) of a low-molecular weight polyalkylene, the binder resin comprising a vinyl-type polymer having 5 to 80 wt. % of a tetrahydrofuran (THF)-insoluble; the magnetic toner having a melt index of 0.2 to 12 g/10 min. (125.degree. C., 10 kg load); the residual magnetization .sigma..sub.r and the volume-average particle size d of the magnetic toner satisfying the following formula:3.7-0.11d.ltoreq..sigma..sub.r .ltoreq.6.5-0.23d,wherein .sigma..sub.r represents a residual magnetization (emu/g) under an external magnetic field of 1 KOe and d represents a volume-average particle size of 3 to 16 microns.

公开(公告)号：US5009973A

公开(公告)日：1991-04-23

申请号：US317182

申请日：1989-02-28

申请人： Satoshi Yoshida ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Kiichiro Sakashita

发明人： Satoshi Yoshida ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Kiichiro Sakashita

IPC分类号： G03G9/09 ,  G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G13/01 ,  G03G13/08 ,  G03G15/08 ,  G03G21/10

CPC分类号： G03G13/013 ,  G03G13/08 ,  G03G9/0819

摘要： An image forming apparatus, comprises: an electrostatic image-bearing member for holding an electrostatic latent image; a developing means for developing the electrostatic latent image to form a toner image on the electrostatic image-bearing member, the developing means including a non-magnetic color toner developing means for development with a developer comprising a non-magnetic color toner and a magnetic toner developing means for development with a magnetic toner, wherein the non-magnetic toner has a volume-average particle size of 4 to 15 microns, the magnetic toner contains 17 to 60% by number of magnetic toner particles having a particle size of 5 microns or smaller, 1-23% by number of magnetic toner particles having a particle size of 8.0-12.7 microns and 2.0% by volume or less of magnetic toner particles having a size of 16 microns or larger, and the magnetic toner has a volume-average particle size of 4-9 micron and a degree of aggregation of 50-95%; a transfer means for transferring the toner image formed on the electrostatic image-bearing member to a transfer-receiving material; and a cleaning means for blade-cleaning the surface of the electrostatic image-bearing member after the transfer.

公开(公告)号：US5296326A

公开(公告)日：1994-03-22

申请号：US994473

申请日：1992-12-21

申请人： Masaaki Taya ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Makoto Unno ,  Masaki Uchiyama ,  Kiichiro Sakashita

发明人： Masaaki Taya ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Makoto Unno ,  Masaki Uchiyama ,  Kiichiro Sakashita

IPC分类号： G03G9/083

CPC分类号： G03G9/0833

摘要： A magnetic toner for electrophotography having stable triboelectric chargeability under various environmental conditions may be provided by using magnetic iron oxide particles having a moderately high surface Feo content, specified by the following conditions: (a) a dissolved Fe (II) content in dissolved total iron of 14-33.3 wt. % at a dissolved total iron percentage of 5.+-.1 wt. %, (b) a dissolved Fe (II) content in dissolved total iron of 17-33.3 wt. % at a dissolved total iron percentage of 10.+-.1 wt. %, and (c) a dissolved Fe (II) content in dissolved total iron of 18-33.3 wt. % at a dissolved total iron percentage of 15.+-.1 wt.

摘要翻译： 可以通过使用具有适度高的表面Feo含量的磁性氧化铁颗粒来提供在各种环境条件下具有稳定的摩擦带电性的电子照相用磁性调色剂，其特征在于以下条件：（a）溶解的总铁中溶解的Fe（II）含量 为14-33.3重量％ ％的溶解总铁百分比为5 + -1wt。 ％，（b）溶解的总铁中溶解的Fe（II）含量为17-33.3wt。 ％的溶解总铁百分比为10 + 1wt。 ％，和（c）溶解的总铁中溶解的Fe（II）含量为18-33.3wt。 ％的溶解总铁百分比为15 + 1重量％。

公开(公告)号：US06541174B1

公开(公告)日：2003-04-01

申请号：US09654873

申请日：2000-09-01

申请人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa ,  Kazuyoshi Hagiwara ,  Minoru Shimojo ,  Rika Shinba ,  Masami Fujimoto ,  Tsutomu Onuma

发明人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa ,  Kazuyoshi Hagiwara ,  Minoru Shimojo ,  Rika Shinba ,  Masami Fujimoto ,  Tsutomu Onuma

IPC分类号： G03G1322

CPC分类号： G03G9/10 ,  G03G9/083 ,  G03G9/0834 ,  G03G9/0839 ,  G03G9/087 ,  G03G9/08746 ,  G03G9/08773 ,  G03G9/08782 ,  G03G9/08791 ,  G03G9/08797 ,  G03G9/09 ,  G03G9/0904 ,  G03G9/0906 ,  G03G9/097 ,  G03G9/09733 ,  G03G9/09766 ,  G03G9/107 ,  Y10S430/102

摘要： A toner for developing an electrostatic image is formed of toner particles; wherein each toner particle includes (i) 100 wt. parts of a binder resin having a glass transition point (Tg) of 50-70° C., (ii) 0.2-20 wt. parts of solid wax, and (iii) colorant particles or magnetic powder; (iv) lubricant particles carrying a liquid lubricant, so that the toner particle retains at its surface the liquid lubricant gradually released from the particles (iv). The toner may be further blended with an organically treated inorganic fine powder to provide a developer. The toner or developer retains good lubricity and releasability so that it is suitable to be used in an image forming method including means contacting a latent image-bearing means, such as a contact charging means, a contact transfer means or a contact cleaning means.

摘要翻译： 用于显影静电图像的调色剂由调色剂颗粒形成; 其中每个调色剂颗粒包括（i）100重量％ 玻璃化转变点（Tg）为50-70℃的粘合剂树脂的部分，（ii）0.2-20重量％ 部分固体蜡，和（iii）着色剂颗粒或磁性粉末; （iv）携带液体润滑剂的润滑剂颗粒，使得调色剂颗粒在其表面保留液体润滑剂从颗粒（iv）逐渐释放。 调色剂可以进一步与有机处理的无机细粉混合以提供显影剂。 调色剂或显影剂保持良好的润滑性和脱模性，因此适合用于图像形成方法，包括使潜像承载装置（例如接触充电装置，接触转印装置或接触清洁装置）接触的装置。

公开(公告)号：US06187496B1

公开(公告)日：2001-02-13

申请号：US08821071

申请日：1997-03-20

申请人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa ,  Kazuyoshi Hagiwara ,  Minoru Shimojo ,  Rika Shinba ,  Masami Fujimoto ,  Tsutomu Onuma

发明人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa ,  Kazuyoshi Hagiwara ,  Minoru Shimojo ,  Rika Shinba ,  Masami Fujimoto ,  Tsutomu Onuma

IPC分类号： G03G9083

CPC分类号： G03G9/10 ,  G03G9/083 ,  G03G9/0834 ,  G03G9/0839 ,  G03G9/087 ,  G03G9/08746 ,  G03G9/08773 ,  G03G9/08782 ,  G03G9/08791 ,  G03G9/08797 ,  G03G9/09 ,  G03G9/0904 ,  G03G9/0906 ,  G03G9/097 ,  G03G9/09733 ,  G03G9/09766 ,  G03G9/107 ,  Y10S430/102

摘要： A toner for developing an electrostatic image is formed of toner particles; wherein each toner particle includes (i) 100 wt. parts of a binder resin having a glass transition point (Tg) of 50-70° C., (ii) 0.2-20 wt. parts of solid wax, and (iii) colorant particles or magnetic powder, (iv) lubricant particles carrying a liquid lubricant, so that the toner particle retains at its surface the liquid lubricant gradually released from the particles (iv). The toner may be further blended with an organically treated inorganic fine powder to provide a developer. The toner or developer retains good lubricity and releasability so that it is suitable to be used in an image forming method including means contacting a latent image-bearing means, such as a contact charging means, a contact transfer means or a contact cleaning means.

摘要翻译： 用于显影静电图像的调色剂由调色剂颗粒形成; 其中每个调色剂颗粒包括（i）100重量％ 玻璃化转变点（Tg）为50-70℃的粘合剂树脂的部分，（ii）0.2-20重量％ 部分固体蜡，和（iii）着色剂颗粒或磁性粉末，（iv）载有液体润滑剂的润滑剂颗粒，使得调色剂颗粒在其表面保留液体润滑剂从颗粒（iv）逐渐释放。 调色剂可以进一步与有机处理的无机细粉混合以提供显影剂。 调色剂或显影剂保持良好的润滑性和脱模性，因此适合用于图像形成方法，包括使潜像承载装置（例如接触充电装置，接触转印装置或接触清洁装置）接触的装置。