Patents by Inventor Eisuke Iwazaki

Eisuke Iwazaki 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: 9726997
    Abstract: An electrostatic charge image developing toner includes toner particles containing crosslinked resin particles having a glass transition temperature of 55° C. or higher in a surface layer of the toner particle, and silica particles having a volume average particle diameter of 30 nm to 300 nm and a coverage with respect to the toner particle from 50% to 100%.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: August 8, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Asafumi Fujita, Narumasa Sato, Eisuke Iwazaki, Tomoaki Tanaka, Kotaro Yoshihara, Noriyuki Mizutani
  • Patent number: 9529292
    Abstract: An electrostatic charge image developing toner includes a toner particle including a binder resin containing a polyester resin, a release agent containing hydrocarbon wax, and a styrene (meth)acrylic resin, wherein 70% or more of the release agent of the entire release agent is present in a portion within 800 nm from the surface of the toner particle, and wherein the styrene (meth)acrylic resin forms a domain having an average diameter of smaller than 0.3 ?m in the toner particle.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: December 27, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomoaki Tanaka, Kotaro Yoshihara, Eisuke Iwazaki, Narumasa Sato, Asafumi Fujita, Noriyuki Mizutani
  • Patent number: 9477166
    Abstract: An electrostatic charge image developing toner, includes toner particles containing a binder resin including a polyester resin, a release agent including a hydrocarbon wax, and a styrene (meth)acrylic resin, wherein 70% or more of the release agent is present within 800 nm from a surface of the toner particles, the styrene (meth)acrylic resin in the toner particles forms a domain having an average diameter from 0.3 ?m to 0.8 ?m, and a number ratio of the domain being in a range of ±0.1 ?m of the average diameter is 65% or more.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: October 25, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Eisuke Iwazaki, Asafumi Fujita, Tomoaki Tanaka, Narumasa Sato, Kotaro Yoshihara, Noriyuki Mizutani
  • Patent number: 9470994
    Abstract: An electrostatic charge image developing toner includes toner particles containing a binder resin including a polyester resin, a release agent including a hydrocarbon wax, and a styrene (meth)acrylic resin, wherein 70% or more of the release agent with respect to the entire release agent is present within 800 nm from the surface of the toner particles, wherein the styrene (meth)acrylic resin forms domains having an average diameter of 0.3 ?m to 0.8 ?m in the toner particles, and wherein a number ratio of the domains included in a range of the average diameter±0.1 ?m is less than 65%.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: October 18, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kotaro Yoshihara, Noriyuki Mizutani, Tomoaki Tanaka, Eisuke Iwazaki, Asafumi Fujita, Narumasa Sato, Erina Saito
  • Patent number: 9316935
    Abstract: A toner for electrostatic latent image development is disclosed. The toner for electrostatic latent image development includes toner particles, the toner particles includes a binder resin and a release agent, and the toner has a linear thermal expansion coefficient in accordance with JIS K 7197-1991 of from about 6×10?5/C.° to about 1×10?3/C.°. An electrostatic latent image developer, a toner cartridge, a process cartridge, and an image forming apparatus are also disclosed.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: April 19, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Eisuke Iwazaki, Satoshi Yoshida, Shintaro Anno, Masaki Nakamura, Satoshi Inoue
  • Patent number: 9304423
    Abstract: An electrostatic charge image developing toner includes toner particles containing an amorphous polyester resin (a1), a crystalline polyester resin (a2), and a styrene-acrylic resin (b) containing 2-carboxyethyl acrylate as a polymerization component.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: April 5, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Eisuke Iwazaki, Narumasa Sato, Asafumi Fujita, Kotaro Yoshihara, Noriyuki Mizutani, Tomoaki Tanaka
  • Patent number: 9304419
    Abstract: An electrostatic charge image developing toner has toner particles that contain a binder resin containing a polyester resin, a release agent containing hydrocarbon-based wax, styrene(meth)acrylic resin particles, and an aluminum element, wherein fluorescent X-ray NET intensity of the aluminum element existing in the toner particles is from 0.1 to 0.3, and 70% or more of the release agent among the entire release agent exists within 800 nm from the surface of the toner particles.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: April 5, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Narumasa Sato, Kotaro Yoshihara, Eisuke Iwazaki, Tomoaki Tanaka, Asafumi Fujita, Noriyuki Mizutani
  • Publication number: 20160085168
    Abstract: An electrostatic charge image developing toner, includes toner particles containing a binder resin including a polyester resin, a release agent including a hydrocarbon wax, and a styrene(meth)acrylic resin, wherein 70% or more of the release agent is present within 800 nm from a surface of the toner particles, the styrene(meth)acrylic resin in the toner particles forms a domain having an average diameter from 0.3 ?m to 0.8 ?m, and a number ratio of the domain being in a range of ±0.1 ?m of the average diameter is 65% or more.
    Type: Application
    Filed: February 4, 2015
    Publication date: March 24, 2016
    Inventors: Eisuke IWAZAKI, Asafumi FUJITA, Tomoaki TANAKA, Narumasa SATO, Kotaro YOSHIHARA, Noriyuki MIZUTANI
  • Publication number: 20160085167
    Abstract: An electrostatic charge image developing toner includes toner particles containing a binder resin including a polyester resin, a release agent including a hydrocarbon wax, and a styrene (meth)acrylic resin, wherein 70% or more of the release agent with respect to the entire release agent is present within 800 nm from the surface of the toner particles, wherein the styrene (meth)acrylic resin forms domains having an average diameter of 0.3 ?m to 0.8 ?m in the toner particles, and wherein a number ratio of the domains included in a range of the average diameter ±0.1 ?m is less than 65%.
    Type: Application
    Filed: February 18, 2015
    Publication date: March 24, 2016
    Inventors: Kotaro YOSHIHARA, Noriyuki MIZUTANI, Tomoaki TANAKA, Eisuke IWAZAKI, Asafumi FUJITA, Narumasa SATO, Erina SAITO
  • Publication number: 20160085166
    Abstract: An electrostatic charge image developing toner includes a toner particle including a binder resin containing a polyester resin, a release agent containing hydrocarbon wax, and a styrene (meth)acrylic resin, wherein 70% or more of the release agent of the entire release agent is present in a portion within 800 nm from the surface of the toner particle, and wherein the styrene (meth)acrylic resin forms a domain having an average diameter of smaller than 0.3 ?m in the toner particle.
    Type: Application
    Filed: February 9, 2015
    Publication date: March 24, 2016
    Inventors: Tomoaki TANAKA, Kotaro YOSHIHARA, Eisuke IWAZAKI, Narumasa SATO, Asafumi FUJITA, Noriyuki MIZUTANI
  • Publication number: 20160026104
    Abstract: An electrostatic charge image developing toner includes toner particles containing crosslinked resin particles having a glass transition temperature of 55° C. or higher in a surface layer of the toner particle, and silica particles having a volume average particle diameter of 30 nm to 300 nm and a coverage with respect to the toner particle from 50% to 100%.
    Type: Application
    Filed: January 20, 2015
    Publication date: January 28, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Asafumi FUJITA, Narumasa SATO, Eisuke IWAZAKI, Tomoaki TANAKA, Kotaro YOSHIHARA, Noriyuki MIZUTANI
  • Patent number: 9244372
    Abstract: An electrostatic charge image developing toner includes a binder resin, toner particles containing an acylglycerol, and an external additive, wherein at least one of hydroxyl groups in the acylglycerol is esterified with an alkyl monocarboxylic acid that contains a substituted or unsubstituted alkyl group having from 12 to 22 carbon atoms, and a content of a portion esterified with the alkyl monocarboxylic acid that contains the alkyl group having the same carbon number is 95 % by weight or greater with respect to the total weight of the acylglycerol.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: January 26, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yuki Takamiya, Eisuke Iwazaki, Shuji Sato, Noriyuki Mizutani
  • Publication number: 20150268573
    Abstract: An electrostatic charge image developing toner includes toner particles containing an amorphous polyester resin (a1), a crystalline polyester resin (a2), and a styrene-acrylic resin (b) containing 2-carboxyethyl acrylate as a polymerization component.
    Type: Application
    Filed: August 11, 2014
    Publication date: September 24, 2015
    Inventors: Eisuke IWAZAKI, Narumasa SATO, Asafumi FUJITA, Kotaro YOSHIHARA, Noriyuki MIZUTANI, Tomoaki TANAKA
  • Patent number: 9104125
    Abstract: An electrostatic charge image developing toner includes a binder resin that contains an amorphous polyester resin and a colorant. The toner satisfies the following expressions: 20 ?S/cm???150 ?S/cm, and 0.01%<Cm/(Cc+Co)×100<0.1%, where ? represents the conductivity of a supernatant solution when 0.1 g of the toner is dissolved in 30 ml of tetrahydrofuran, Cm represents the content (% by mass) of metal elements Al, Mg, and Fe, Cc represents the content (% by mass) of carbon, and Co represents the content (% by mass) of oxygen.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: August 11, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinya Sakamoto, Satoshi Inoue, Satoshi Yoshida, Eisuke Iwazaki, Tsuyoshi Murakami
  • Publication number: 20150220009
    Abstract: An electrostatic charge image developing toner has toner particles that contain a binder resin containing a polyester resin, a release agent containing hydrocarbon-based wax, styrene(meth)acrylic resin particles, and an aluminum element, wherein fluorescent X-ray NET intensity of the aluminum element existing in the toner particles is from 0.1 to 0.3, and 70% or more of the release agent among the entire release agent exists within 800 nm from the surface of the toner particles.
    Type: Application
    Filed: August 12, 2014
    Publication date: August 6, 2015
    Inventors: Narumasa SATO, Kotaro YOSHIHARA, Eisuke IWAZAKI, Tomoaki TANAKA, Asafumi FUJITA, Noriyuki MIZUTANI
  • Publication number: 20150111139
    Abstract: An electrostatic charge image developing toner includes a binder resin, toner particles containing an acylglycerol, and an external additive, wherein at least one of hydroxyl groups in the acylglycerol is esterified with an alkyl monocarboxylic acid that contains a substituted or unsubstituted alkyl group having from 12 to 22 carbon atoms, and a content of a portion esterified with the alkyl monocarboxylic acid that contains the alkyl group having the same carbon number is 95% by weight or greater with respect to the total weight of the acylglycerol.
    Type: Application
    Filed: April 16, 2014
    Publication date: April 23, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuki TAKAMIYA, Eisuke IWAZAKI, Shuji SATO, Noriyuki MIZUTANI
  • Patent number: 8815482
    Abstract: A transparent electrostatic charge image developing toner contains a binder resin, europium, and bismuth.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: August 26, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuki Takamiya, Tsuyoshi Murakami, Eisuke Iwazaki, Satoshi Yoshida, Satoshi Inoue
  • Patent number: 8765343
    Abstract: An electrostatic latent image developing toner contains a binder resin, a colorant, europium, and bismuth.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: July 1, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuki Takamiya, Eisuke Iwazaki, Satoshi Yoshida, Satoshi Inoue
  • Publication number: 20140147778
    Abstract: A transparent electrostatic charge image developing toner includes a binder resin and a compound represented by the following Formula (1):
    Type: Application
    Filed: April 9, 2013
    Publication date: May 29, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi MURAKAMI, Eisuke IWAZAKI, Yuki TAKAMIYA
  • Publication number: 20140106270
    Abstract: A transparent electrostatic charge image developing toner includes a binder resin and a compound represented by the following Formula (1): wherein in Formula (1), R1 represents a methyl group or a trifluoromethyl group; R2 represents a hydrogen atom; R3 represents a methyl group, a trifluoromethyl group, a t-butyl group, a phenyl group, or a naphthyl group; and M represents a rare earth element.
    Type: Application
    Filed: May 2, 2013
    Publication date: April 17, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuki TAKAMIYA, Tsuyoshi MURAKAMI, Eisuke IWAZAKI, Satoshi INOUE