Patents by Inventor Masahiro Oki

Masahiro Oki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Liquid developer and developer cartridge
    Patent number: 9766565
    Abstract: A liquid developer includes a carrier liquid and a toner including a urethane-modified acrylic resin.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: September 19, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masahiro Oki, Koji Horiba, Takako Kobayashi, Akira Imai, Yoshitake Ogura, Hiroyuki Moriya, Daisuke Yoshino
  • LIQUID DEVELOPER AND DEVELOPER CARTRIDGE
    Publication number: 20170235242
    Abstract: A liquid developer includes a carrier liquid and a toner including a urethane-modified acrylic resin.
    Type: Application
    Filed: August 12, 2016
    Publication date: August 17, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masahiro OKI, Koji HORIBA, Takako KOBAYASHI, Akira IMAI, Yoshitake OGURA, Hiroyuki MORIYA, Daisuke YOSHINO
  • Liquid developer, developer cartridge, and image forming apparatus
    Patent number: 9709914
    Abstract: A liquid developer includes a carrier liquid and a toner particle whose surface is treated by a polyamine, wherein an amount of sodium ion to be eluted in 1 g of the toner particles is 0.04 mg or less.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: July 18, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoshihiro Inaba, Takako Kobayashi, Daisuke Yoshino, Akira Imai, Masahiro Oki, Koji Horiba, Hiroyuki Moriya
  • Positively chargeable toner, liquid developer, developer, developer cartridge, process cartridge, and image forming method
    Patent number: 9568850
    Abstract: A positively chargeable toner includes at least a binder resin, and toner particles of which surfaces are modified by a polyvinylamine compound.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: February 14, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masahiro Oki, Akira Imai, Yoshihiro Inaba, Takako Kobayashi, Daisuke Yoshino, Hiroyuki Moriya, Koji Horiba
  • Liquid developer, developer cartridge, and image forming apparatus
    Patent number: 9568849
    Abstract: A liquid developer contains a carrier liquid and a toner particle which contains a binder resin, wherein the toner particles have a content of aluminum measured by fluorescent X-ray analysis in a range of from 0.04% by weight to 0.1% by weight of total elements.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: February 14, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Akira Imai, Koji Horiba, Daisuke Yoshino, Takako Kobayashi, Masahiro Oki, Yoshitake Ogura, Hiroyuki Moriya, Yoshihiro Inaba
  • Liquid developer, developer cartridge, and image forming apparatus
    Patent number: 9482978
    Abstract: A liquid developer includes a carrier liquid, and a toner particle which contains a resin having an unsaturated double bond, a compound represented by the formula (I) and a photopolymerization initiator and whose surface is treated by a polyamine, wherein m and n each independently represent an integer of 1 to 10,000; m+n represents an integer of 10 to 10,000; and R1, R2, and R3 each independently represent a single bond or a divalent aliphatic hydrocarbon group having 1 to 12 carbon atoms.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: November 1, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Koji Horiba, Masahiro Oki, Yoshihiro Inaba, Akira Imai, Daisuke Yoshino, Takako Kobayashi, Hiroyuki Moriya
  • Electrostatic charge image developing toner, liquid developer, and toner cartridge
    Patent number: 9436113
    Abstract: An electrostatic charge image developing toner includes a toner particle that contains a binder resin and is surface-modified by a polymer obtained by polymerizing a monomer containing dicyandiamide and diethylenetriamine, wherein toner particles have positive charging properties.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: September 6, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masahiro Oki, Akira Imai, Koji Horiba, Takako Kobayashi, Daisuke Yoshino, Yoshihiro Inaba, Hiroyuki Moriya
  • LIQUID DEVELOPER, DEVELOPER CARTRIDGE, AND IMAGE FORMING APPARATUS
    Publication number: 20160231663
    Abstract: A liquid developer includes a carrier liquid and a toner particle whose surface is treated by a polyamine, wherein an amount of sodium ion to be eluted in 1 g of the toner particles is 0.04 mg or less.
    Type: Application
    Filed: August 12, 2015
    Publication date: August 11, 2016
    Inventors: Yoshihiro INABA, Takako KOBAYASHI, Daisuke YOSHINO, Akira IMAI, Masahiro OKI, Koji HORIBA, Hiroyuki MORIYA
  • LIQUID DEVELOPER, DEVELOPER CARTRIDGE, AND IMAGE FORMING APPARATUS
    Publication number: 20160223929
    Abstract: A liquid developer includes a carrier liquid, and a toner particle which contains a resin having an unsaturated double bond, a compound represented by the formula (I) and a photopolymerization initiator and whose surface is treated by a polyamine, wherein m and n each independently represent an integer of 1 to 10,000; m+n represents an integer of 10 to 10,000; and R1, R2, and R3 each independently represent a single bond or a divalent aliphatic hydrocarbon group having 1 to 12 carbon atoms.
    Type: Application
    Filed: July 31, 2015
    Publication date: August 4, 2016
    Inventors: Koji HORIBA, Masahiro OKI, Yoshihiro INABA, Akira IMAI, Daisuke YOSHINO, Takako KOBAYASHI, Hiroyuki MORIYA
  • LIQUID DEVELOPER, DEVELOPER CARTRIDGE, AND IMAGE FORMING APPARATUS
    Publication number: 20160202626
    Abstract: A liquid developer contains a carrier liquid and a toner particle which contains a binder resin, wherein the toner particles have a content of aluminum measured by fluorescent X-ray analysis in a range of from 0.04% by weight to 0.1% by weight of total elements.
    Type: Application
    Filed: August 19, 2015
    Publication date: July 14, 2016
    Inventors: Akira IMAI, Koji HORIBA, Daisuke YOSHINO, Takako KOBAYASHI, Masahiro OKI, Yoshitake OGURA, Hiroyuki MORIYA, Yoshihiro INABA
  • ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, LIQUID DEVELOPER, AND TONER CARTRIDGE
    Publication number: 20160187800
    Abstract: An electrostatic charge image developing toner includes a toner particle that contains a binder resin and is surface-modified by a polymer obtained by polymerizing a monomer containing dicyandiamide and diethylenetriamine, wherein toner particles have positive charging properties.
    Type: Application
    Filed: July 28, 2015
    Publication date: June 30, 2016
    Inventors: Masahiro OKI, Akira IMAI, Koji HORIBA, Takako KOBAYASHI, Daisuke YOSHINO, Yoshihiro INABA, Hiroyuki MORIYA
  • Liquid developer, particles for liquid developer, and liquid developer accommodation container
    Patent number: 9285700
    Abstract: A liquid developer includes a carrier liquid having silicone oil, and toner particles including a polyester resin and having a value of ammonium ions contained therein measured by underwater extraction in a range of 0.005 ppm to 1 ppm.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: March 15, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takako Kobayashi, Daisuke Yoshino, Akira Imai, Koji Horiba, Masahiro Oki, Hiroyuki Moriya, Yoshihiro Inaba
  • IMAGE FORMING METHOD
    Publication number: 20160048097
    Abstract: An image forming method includes forming an unfixed toner image on a recording medium using a toner that contains a carboxyl group-containing resin having a carboxyl group and an oxazoline group-containing resin having an oxazoline group, fixing the unfixed toner image to the recording medium to form a fixed toner image, and performing a heat treatment on the fixed toner image at a temperature higher than or equal to a fixing temperature.
    Type: Application
    Filed: January 14, 2015
    Publication date: February 18, 2016
    Inventors: Yoshihiro INABA, Koji HORIBA, Akira IMAI, Masahiro OKI, Takako KOBAYASHI, Daisuke YOSHINO, Hiroyuki MORIYA
  • POSITIVELY CHARGEABLE TONER, LIQUID DEVELOPER, DEVELOPER, DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD
    Publication number: 20160026106
    Abstract: A positively chargeable toner includes at least a binder resin, and toner particles of which surfaces are modified by a polyvinylamine compound.
    Type: Application
    Filed: January 12, 2015
    Publication date: January 28, 2016
    Inventors: Masahiro OKI, Akira IMAI, Yoshihiro INABA, Takako KOBAYASHI, Daisuke YOSHINO, Hiroyuki MORIYA, Koji HORIBA
  • Image forming method
    Patent number: 9244393
    Abstract: An image forming method includes forming an unfixed toner image on a recording medium using a toner that contains a carboxyl group-containing resin having a carboxyl group and an oxazoline group-containing resin having an oxazoline group, fixing the unfixed toner image to the recording medium to form a fixed toner image, and performing a heat treatment on the fixed toner image at a temperature higher than or equal to a fixing temperature.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: January 26, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoshihiro Inaba, Koji Horiba, Akira Imai, Masahiro Oki, Takako Kobayashi, Daisuke Yoshino, Hiroyuki Moriya
  • Discharge lamp and discharge lamp apparatus
    Patent number: 9190259
    Abstract: There is provided a discharge lamp of an embodiment includes a burner having a light emitting part, and a disk-shaped flange which is capable of holding the burner so that the light emitting part is positioned at a front end side of the flange. The flange includes a resin part formed at an edge of the flange, and a metal part formed to be embedded in the resin part.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: November 17, 2015
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Masahiro Doi, Makoto Deguchi, Osamu Shirakawa, Syuhei Abe, Keisuke Nakazato, Masahiro Oki, Kousuke Ueda, Hajime Murakami
  • LIQUID DEVELOPER, PARTICLES FOR LIQUID DEVELOPER, AND LIQUID DEVELOPER ACCOMMODATION CONTAINER
    Publication number: 20150147692
    Abstract: A liquid developer includes a carrier liquid having silicone oil, and toner particles including a polyester resin and having a value of ammonium ions contained therein measured by underwater extraction in a range of 0.005 ppm to 1 ppm.
    Type: Application
    Filed: May 27, 2014
    Publication date: May 28, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takako KOBAYASHI, Daisuke YOSHINO, Akira IMAI, Koji HORIBA, Masahiro OKI, Hiroyuki MORIYA, Yoshihiro INABA
  • Toner, liquid developer, dry developer, developer cartridge, process cartridge, image forming apparatus, and image forming method
    Patent number: 8951704
    Abstract: A toner includes a crystalline polyester resin having an unsaturated double bond, a thiol compound having a bi- or more-functional thiol group, and a photopolymerization initiator.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: February 10, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Koji Horiba, Yoshihiro Inaba, Daisuke Yoshino, Takako Kobayashi, Akira Imai, Masahiro Oki, Hiroyuki Moriya
  • Liquid developer, developer cartridge, process cartridge, image forming apparatus, and image forming method
    Patent number: 8911925
    Abstract: A liquid developer contains a carrier liquid, and toner particles containing a binder resin and a pigment surface-treated with a polyallylamine compound as a colorant.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: December 16, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masahiro Oki, Yoshihiro Inaba, Akira Imai, Daisuke Yoshino, Takako Kobayashi, Koji Horiba
  • TONER, LIQUID DEVELOPER, DRY DEVELOPER, DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
    Publication number: 20140272693
    Abstract: A toner includes a crystalline polyester resin having an unsaturated double bond, a thiol compound having a bi- or more-functional thiol group, and a photopolymerization initiator.
    Type: Application
    Filed: August 8, 2013
    Publication date: September 18, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Koji HORIBA, Yoshihiro INABA, Daisuke YOSHINO, Takako KOBAYASHI, Akira IMAI, Masahiro OKI, Hiroyuki MORIYA