Patents by Inventor Norihito Fukushima

Norihito Fukushima 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).

  • Patent number: 9740130
    Abstract: An electrostatic charge image developing carrier includes a core particle and a resin coating layer coated on the core particle, wherein the resin coating layer contains a cationic surfactant and an anionic surfactant and a total content of the cationic surfactant and the anionic surfactant in the resin coating layer is from 0.1% by weight to 6.0% by weight with respect to the entire resin coating layer.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: August 22, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Norihito Fukushima, Takeshi Tanabe, Toshiaki Hasegawa
  • Patent number: 9733593
    Abstract: An electrostatic charge image developing carrier includes a magnetic core particle, and a coating layer that coats surfaces of the magnetic core particle, wherein the coating layer includes a binder resin, thermosetting resin particles, and crosslinked resin particles, and the crosslinked resin particle contains a polymer formed by polymerizing a monomer component including the same monomer as a monomer used in the polymerization of the binder resin.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: August 15, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Toshiaki Hasegawa, Norihito Fukushima, Shintaro Anno
  • Publication number: 20160238960
    Abstract: An electrostatic charge image developing carrier includes a core particle and a resin coating layer coated on the core particle, wherein the resin coating layer contains a cationic surfactant and an anionic surfactant and a total content of the cationic surfactant and the anionic surfactant in the resin coating layer is from 0.1% by weight to 6.0% by weight with respect to the entire resin coating layer.
    Type: Application
    Filed: August 31, 2015
    Publication date: August 18, 2016
    Inventors: Norihito FUKUSHIMA, Takeshi TANABE, Toshiaki HASEGAWA
  • Publication number: 20160026120
    Abstract: An electrostatic charge image developing carrier includes a magnetic core particle, and a coating layer that coats surfaces of the magnetic core particle, wherein the coating layer includes a binder resin, thermosetting resin particles, and crosslinked resin particles, and the crosslinked resin particle contains a polymer formed by polymerizing a monomer component including the same monomer as a monomer used in the polymerization of the binder resin.
    Type: Application
    Filed: January 29, 2015
    Publication date: January 28, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Toshiaki HASEGAWA, Norihito FUKUSHIMA, Shintaro ANNO
  • Patent number: 9005861
    Abstract: An electrostatic latent image developer contains: an electrostatic-latent-image-developing toner that has toner particles formed by aggregating and fusing particles of a polyester resin, particles of a styrene resin and particles of a coloring agent in a starting material dispersion liquid of those particles dispersed in an aqueous solvent; and a carrier having a core particle and a resin coating layer to coat the surface of the core particle, wherein the ratio of the exposed area of the core particle to the surface of the carrier is about 7% or less.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: April 14, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norihito Fukushima, Manabu Serizawa
  • Patent number: 8828638
    Abstract: A two-component developer including a yellow toner and a carrier, the yellow toner including at least one of C. I. Pigment Yellow 155 or C. I. Pigment Yellow 185, and an azo pigment, the carrier including a first resin, magnetic particles dispersed in the first resin, and elements of Cu, Zn, Ni and Mn each in an amount of from 0 to about 2,000 ppm.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: September 9, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norihito Fukushima, Manabu Serizawa, Katsuyuki Kitajima
  • Patent number: 8815486
    Abstract: A carrier for a two-component developer, includes: magnetic particles and a resin coating layer that is coated on the magnetic particles, the resin coating layer containing metal nitride particles having a volume average primary particle diameter of from about 300 to about 2,000 nm.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: August 26, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norihito Fukushima, Toshiaki Hasegawa, Yosuke Tsurumi
  • Patent number: 8802343
    Abstract: A carrier for developing an electrostatic charge image comprising a core material and a coating resin layer that covers the core material, wherein the core material is a ferrite particle having a Brunauer-Emmitt-Teller (BET) specific surface area of from about 0.12 m2/g to about 0.20 m2/g, and having a fluidity of from about 26 sec/50 g to about 30 sec/50 g.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: August 12, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yosuke Tsurumi, Norihito Fukushima, Yasuaki Hashimoto, Shintaro Anno
  • Patent number: 8715899
    Abstract: A carrier for a two-component developer includes magnetic particles, and a resin coating layer that covers the magnetic particles. The resin coating layer contains metal boride particles having a volume average primary particle diameter of from about 300 nm to about 2,500 nm.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: May 6, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norihito Fukushima, Takeshi Shoji, Toshiaki Hasegawa
  • Publication number: 20140051022
    Abstract: An electrostatic charge image developing carrier includes a core particle that has a BET specific surface area of from 0.15 m2/g to 0.30 m2/g; and a coating layer that contains a polycyclohexyl methacrylate resin and has a void ratio of from 2% to 10% and with which the core particle is coated, in which a content of a volatile organic compound is less than or equal to 500 ppm.
    Type: Application
    Filed: May 1, 2013
    Publication date: February 20, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takeshi SHOJI, Norihito FUKUSHIMA, Toshiaki HASEGAWA
  • Patent number: 8597866
    Abstract: A method of producing a carrier for electrophotography includes: covering a surface of a core particle with a coating layer including resin particles and a crosslinking resin in an uncrosslinked state present in spaces between the resin particles; and applying a mechanical impact from the outer surface of the coating layer before crosslinking of the crosslinking resin.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: December 3, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Sakon Takahashi, Norihito Fukushima, Shunsuke Nozaki, Michio Take
  • Publication number: 20130260296
    Abstract: An electrostatic latent image developer contains: an electrostatic-latent-image-developing toner that has toner particles formed by aggregating and fusing particles of a polyester resin, particles of a styrene resin and particles of a coloring agent in a starting material dispersion liquid of those particles dispersed in an aqueous solvent; and a carrier having a core particle and a resin coating layer to coat the surface of the core particle, wherein the ratio of the exposed area of the core particle to the surface of the carrier is about 7% or less.
    Type: Application
    Filed: July 16, 2012
    Publication date: October 3, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Norihito FUKUSHIMA, Manabu SERIZAWA
  • Patent number: 8486600
    Abstract: A carrier for developing an electrostatic charge image, including a core, and a coating layer including a resin and inorganic oxide particles that exhibit electroconductivity, by which the core is coated, wherein the inorganic oxide particles have, when they are aggregated, an aggregation size of, or when they are not aggregated, a primary particle size of, from 230 nm to 970 nm.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: July 16, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norihito Fukushima, Akihiro Iizuka, Yosuke Tsurumi, Takahiro Yamashita, Shintaro Anno, Yasuaki Hashimoto
  • Publication number: 20130040236
    Abstract: A carrier for a two-component developer includes magnetic particles, and a resin coating layer that covers the magnetic particles. The resin coating layer contains metal boride particles having a volume average primary particle diameter of from about 300 nm to about 2,500 nm.
    Type: Application
    Filed: February 22, 2012
    Publication date: February 14, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Norihito FUKUSHIMA, Takeshi SHOJI, Toshiaki HASEGAWA
  • Publication number: 20120214098
    Abstract: A carrier for a two-component developer, includes: magnetic particles and a resin coating layer that is coated on the magnetic particles, the resin coating layer containing metal nitride particles having a volume average primary particle diameter of from about 300 to about 2,000 nm.
    Type: Application
    Filed: September 2, 2011
    Publication date: August 23, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Norihito FUKUSHIMA, Toshiaki HASEGAWA, Yosuke TSURUMI
  • Publication number: 20120064452
    Abstract: A carrier for developing an electrostatic charge image comprising a core material and a coating resin layer that covers the core material,wherein the core material is a ferrite particle having a Brunauer-Emmitt-Teller (BET) specific surface area of from about 0.12 m2/g to about 0.20 m2/g, and having a fluidity of from about 26 sec/50 g to about 30 sec/50 g.
    Type: Application
    Filed: March 4, 2011
    Publication date: March 15, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yosuke TSURUMI, Norihito FUKUSHIMA, Yasuaki HASHIMOTO, Shintaro ANNO
  • Patent number: 8039188
    Abstract: An electrostatic image developing toner including a binder resin; and a colorant, and satisfying following conditions (1) and (2): 0.02?CA/CB?0.20??(1) 1?Nt/St?15??(2) wherein CA represents an amount of a carboxyl group and its salt on a surface of the toner, CB represents an amount of a carboxyl group and its salt in the entire toner, Nt represents an amount of a nitrogen element on the surface of the toner, and St represents an amount of a sulfur element on the surface of the toner.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: October 18, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Norihito Fukushima
  • Publication number: 20110236814
    Abstract: A carrier for developing an electrostatic charge image, including a core, and a coating layer including a resin and inorganic oxide particles that exhibit electroconductivity, by which the core is coated, wherein the inorganic oxide particles have, when they are aggregated, an aggregation size of or when they are not aggregated, a primary particle size of, from 230 nm to 970 nm.
    Type: Application
    Filed: February 24, 2011
    Publication date: September 29, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Norihito FUKUSHIMA, Akihiro IIZUKA, Yosuke TSURUMI, Takahiro YAMASHITA, Shintaro ANNO, Yasuaki HASHIMOTO
  • Publication number: 20100248112
    Abstract: A two-component developer including a yellow toner and a carrier, the yellow toner including at least one of C. I. Pigment Yellow 155 or C. I. Pigment Yellow 185, and an azo pigment, the carrier including a first resin, magnetic particles dispersed in the first resin, and elements of Cu, Zn, Ni and Mn each in an amount of from 0 to about 2,000 ppm.
    Type: Application
    Filed: September 28, 2009
    Publication date: September 30, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Norihito FUKUSHIMA, Manabu SERIZAWA, Katsuyuki KITAJIMA
  • Publication number: 20100233615
    Abstract: A method of producing a carrier for electrophotography includes: covering a surface of a core particle with a coating layer including resin particles and a crosslinking resin in an uncrosslinked state present in spaces between the resin particles; and applying a mechanical impact from the outer surface of the coating layer before crosslinking of the crosslinking resin.
    Type: Application
    Filed: September 11, 2009
    Publication date: September 16, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Sakon TAKAHASHI, Norihito FUKUSHIMA, Shunsuke NOZAKI, Michio TAKE