公开(公告)号：US09989874B2

公开(公告)日：2018-06-05

申请号：US15449572

申请日：2017-03-03

申请人： Yoshihiro Murasawa ,  Toyoaki Tano ,  Hiroyuki Kishida ,  Masato Taikoji ,  Kenichi Mashiko ,  Mariko Takii ,  Haruki Murata

发明人： Yoshihiro Murasawa ,  Toyoaki Tano ,  Hiroyuki Kishida ,  Masato Taikoji ,  Kenichi Mashiko ,  Mariko Takii ,  Haruki Murata

IPC分类号： G03G9/113 ,  G03G9/107 ,  G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G15/08

CPC分类号： G03G9/1075 ,  G03G9/0819 ,  G03G9/08755 ,  G03G9/091 ,  G03G9/0926 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1136 ,  G03G9/1139 ,  G03G15/08 ,  G03G2215/0607

摘要： A carrier for developing electrostatic latent images is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a particulate material A having a volume average particle diameter (a) and a particulate material B having a volume average particle diameter (b). The volume average particle diameter (a) of the particulate material A is the largest among volume average particle diameters of all particulate materials included in the resin layer, and an inequation 100≥(a)/(b)≥5 is satisfied. The particulate material A is barium sulfate.

公开(公告)号：US10915035B2

公开(公告)日：2021-02-09

申请号：US16305196

申请日：2017-05-26

申请人： Haruki Murata ,  Hiroyuki Kishida ,  Toyoaki Tano ,  Kenichi Mashiko ,  Masato Taikoji ,  Mariko Takii ,  Yoshihiro Murasawa

发明人： Haruki Murata ,  Hiroyuki Kishida ,  Toyoaki Tano ,  Kenichi Mashiko ,  Masato Taikoji ,  Mariko Takii ,  Yoshihiro Murasawa

IPC分类号： G03G9/00 ,  G03G9/113 ,  G03G9/08 ,  G03G15/08

摘要： A carrier for developing an electrostatic latent image includes a core material particle and a resin layer covering a surface of the core material particle. The resin layer includes a resin and at least one kind of a fine particle. At least one kind of the fine particles includes a chargeable fine particle. The chargeable fine particle has a long diameter of 400 to 900 nm. The chargeable fine particle has a shape factor SF-1 of 160 to 250.

公开(公告)号：US10067438B2

公开(公告)日：2018-09-04

申请号：US15522306

申请日：2015-09-29

申请人： Yoshihiro Murasawa ,  Hiroshi Tohmatsu ,  Hitoshi Iwatsuki ,  Mariko Takii ,  Koichi Sakata ,  Hiroyuki Kishida ,  Toyoaki Tano ,  Kenichi Mashiko

发明人： Yoshihiro Murasawa ,  Hiroshi Tohmatsu ,  Hitoshi Iwatsuki ,  Mariko Takii ,  Koichi Sakata ,  Hiroyuki Kishida ,  Toyoaki Tano ,  Kenichi Mashiko

IPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/09 ,  G03G9/087

CPC分类号： G03G9/1075 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/0902 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1139

摘要： Provided is an electrostatic latent image developing white toner, including: a white toner including at least a binder resin, a white pigment, and a release agent; and a magnetic carrier including at least a core material, and a coating layer coating the core material and made of a coating resin and conductive particles, wherein Ra of the magnetic carrier is in a range of from 0.50 μm to 1.00 μm, and a bulk density of the magnetic carrier is in a range of from 2.08 g/cm3 to 2.24 g/cm3.

公开(公告)号：US10197948B2

公开(公告)日：2019-02-05

申请号：US15511291

申请日：2015-08-31

申请人： Hitoshi Iwatsuki ,  Koichi Sakata ,  Hiroshi Tohmatsu ,  Toyoaki Tano ,  Kenichi Mashiko ,  Mariko Takii ,  Hiroyuki Kishida ,  Yoshihiro Murasawa ,  Keinosuke Kondoh ,  Toshio Koike ,  Yutaka Takahashi

发明人： Hitoshi Iwatsuki ,  Koichi Sakata ,  Hiroshi Tohmatsu ,  Toyoaki Tano ,  Kenichi Mashiko ,  Mariko Takii ,  Hiroyuki Kishida ,  Yoshihiro Murasawa ,  Keinosuke Kondoh ,  Toshio Koike ,  Yutaka Takahashi

IPC分类号： G03G15/09 ,  G03G9/113 ,  G03G15/06

摘要： A developing device, including: a developer containing toner and carrier; and developer bearer configured to have surface thereof bear the developer and endlessly move, and to develop latent image over surface of latent image bearer by supplying toner in developer to latent image in developing region facing the latent image bearer, wherein carrier contains fine particles, value X in volume resistivity R (=10X) (Ω·cm) of carrier is 11.5-16.0, developer bearer includes: magnetic field generating unit including a plurality of magnetic poles; and developing sleeve having a cylindrical shape enclosing magnetic field generating unit, and configured to bear developer over outer circumferential surface of cylindrical shape by magnetic force of the magnetic field generating unit and perform surface moving by rotating relative to developing device body, and developing device includes developing sleeve voltage applying unit configured to apply AC component-containing voltage to developing sleeve.

公开(公告)号：US10054868B2

公开(公告)日：2018-08-21

申请号：US15331118

申请日：2016-10-21

申请人： Hiroyuki Kishida ,  Kenichi Mashiko ,  Mariko Takii ,  Yoshihiro Murasawa ,  Haruki Murata

发明人： Hiroyuki Kishida ,  Kenichi Mashiko ,  Mariko Takii ,  Yoshihiro Murasawa ,  Haruki Murata

IPC分类号： G03G9/113 ,  G03G9/10 ,  G03G15/08

CPC分类号： G03G9/10 ,  G03G9/1139 ,  G03G15/08

摘要： A carrier includes a core and a covering layer covering the core and including at least carbon black and a filler. The maximum height Ry of the surface of the carrier is from 4.0 μm to 5.0 μm.

公开(公告)号：US10031434B2

公开(公告)日：2018-07-24

申请号：US15160590

申请日：2016-05-20

申请人： Mariko Takii ,  Yoshihiro Murasawa ,  Takahiro Nakamura ,  Kei Niwayama ,  Haruki Murata ,  Masato Taikoji ,  Koichi Sakata

发明人： Mariko Takii ,  Yoshihiro Murasawa ,  Takahiro Nakamura ,  Kei Niwayama ,  Haruki Murata ,  Masato Taikoji ,  Koichi Sakata

IPC分类号： G03G9/113 ,  G03G9/107 ,  G03G15/08

摘要： A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.

公开(公告)号：US10025214B2

公开(公告)日：2018-07-17

申请号：US15392482

申请日：2016-12-28

申请人： Masashi Nagayama ,  Mariko Takii ,  Yoshihiro Murasawa ,  Haruki Murata ,  Kei Niwayama ,  Tohru Suganuma ,  Koichi Sakata ,  Saori Yamada ,  Shinya Nakagawa ,  Kohsuke Miyazaki

发明人： Masashi Nagayama ,  Mariko Takii ,  Yoshihiro Murasawa ,  Haruki Murata ,  Kei Niwayama ,  Tohru Suganuma ,  Koichi Sakata ,  Saori Yamada ,  Shinya Nakagawa ,  Kohsuke Miyazaki

IPC分类号： G03G9/113 ,  G03G15/08 ,  G03G9/083 ,  G03G15/01

摘要： Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 μm from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 Ω·cm or less.

公开(公告)号：US09946177B2

公开(公告)日：2018-04-17

申请号：US15397522

申请日：2017-01-03

申请人： Yoshihiro Murasawa ,  Koichi Sakata ,  Masashi Nagayama ,  Toyoaki Tano ,  Hiroyuki Kishida

发明人： Yoshihiro Murasawa ,  Koichi Sakata ,  Masashi Nagayama ,  Toyoaki Tano ,  Hiroyuki Kishida

IPC分类号： G03G9/113 ,  G03G9/083 ,  G03G15/08

CPC分类号： G03G9/0831 ,  G03G9/1075 ,  G03G9/1136 ,  G03G9/1137 ,  G03G9/1139 ,  G03G15/08 ,  G03G15/0808 ,  G03G2215/0607

摘要： A carrier is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a resin, a conductive particle including tungsten tin oxide, and a chargeable filler.

公开(公告)号：US4860048A

公开(公告)日：1989-08-22

申请号：US199278

申请日：1988-05-26

申请人： Masahiro Itoh ,  Yoshihiro Murasawa ,  Atsushi Takeda ,  Hiroaki Tsuchiya ,  Kimio Nakahata

发明人： Masahiro Itoh ,  Yoshihiro Murasawa ,  Atsushi Takeda ,  Hiroaki Tsuchiya ,  Kimio Nakahata

IPC分类号： G03G15/00 ,  G03G15/01

CPC分类号： G03G15/0152 ,  G03G15/0163

摘要： An image forming apparatus includes movable image bearing member, a first charger means for charging the image bearing member, first electrostatic latent image forming device for forming a first electrostatic latent image in accordance with image information on the image bearing means charged by the first charger, first developing device for developing the first electrostatic latent image, a second charger for re-charging the image bearing member, second electrostatic latent image forming device for forming a second electrostatic latent image in accordance with image information on the image bearing member recharged by the second charger, second developing device for developing the second electrostatic latent image, a dector for detecting a surface potential of the image bearing member, the detector detecting at least the surface potential at that portion of the latent image formed on the image bearing member by the first latent image forming device which is developed, after the portion is charged by the second charger, and a controller for controlling the second charger to provide a target potential of the portion and for controlling a developing bias voltage of the second developing device in accordance with the potential of the portion.

摘要翻译： 图像形成装置包括可动图像承载部件，用于对图像承载部件充电的第一充电器装置，用于根据由第一充电器充电的图像承载装置上的图像信息形成第一静电潜像的第一静电潜像形成装置， 用于显影第一静电潜像的第一显影装置，用于对图像承载部件重新充电的第二充电器，根据第二静电潜像形成装置，用于根据第二静电潜像形成装置再次充电的图像载体上的图像信息形成第二静电潜像 充电器，用于显影第二静电潜像的第二显影装置，用于检测图像承载部件的表面电位的检测器，检测器至少检测在图像承载部件上形成的潜像的该部分处的表面电位， 潜像图像形成装置 n由第二充电器充电，以及控制器，用于控制第二充电器以提供该部分的目标电位并根据该部分的电位来控制第二显影装置的显影偏压。

公开(公告)号：US4814886A

公开(公告)日：1989-03-21

申请号：US213513

申请日：1988-06-28

申请人： Tsukasa Kuge ,  Takahiro Inoue ,  Yasushi Sato ,  Akio Suzuki ,  Yoshihiro Murasawa ,  Hiroshi Sasame ,  Jun Asai

发明人： Tsukasa Kuge ,  Takahiro Inoue ,  Yasushi Sato ,  Akio Suzuki ,  Yoshihiro Murasawa ,  Hiroshi Sasame ,  Jun Asai

IPC分类号： H04N1/405

CPC分类号： H04N1/4056

摘要： An image processing process forms a plural microdots for each pixel, and the number of microdots increases only in one direction for representing a higher density, thereby achieving an improved linearity in the density levels without sacrificing the resolving power.

摘要翻译： 图像处理过程为每个像素形成多个微点，并且微点的数量仅在一个方向上增加以表示较高的密度，从而在不牺牲分辨率的情况下实现密度水平的改善的线性度。