Patents by Inventor Sakiko HIRAI

Sakiko HIRAI 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).

  • Publication number: 20170031309
    Abstract: A unit for an image forming apparatus includes an image holding member; a developing unit that includes a developing roll, a voltage applying section, and a regulating member for regulating a thickness of an electrostatic charge image developer held on the developing roll; and a cleaning unit that includes a cleaning blade which contacts with the image holding member, wherein the developing roll is provided with an interval of 100 ?m to 300 ?m with respect to the image holding member, the regulating member is provided with an interval of 0.1 mm to 0.6 mm with respect to the developing roll, the voltage applying section applies a specific alternating voltage to the developing roll, and a product of the number average particle diameter [nm] of the inorganic particles and the interval [mm] of the regulating member falls within the range of from 26 to 81.
    Type: Application
    Filed: January 8, 2016
    Publication date: February 2, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Makoto Kamisaki, Manabu Furuki, Masahiro Uchida, Masashi Ikeda, Sakiko Hirai, Teppei Yawada
  • Publication number: 20170031308
    Abstract: A unit for an image forming apparatus includes a developing unit that includes a developing roll and a voltage applying section, and a cleaning unit that includes a cleaning blade which contacts with the image holding member and cleans a surface of the image holding member, wherein the developing roll is provided with an interval of 100 ?m to 300 ?m with respect to the image holding member, and holds an electrostatic charge image developer including a carrier and a toner whose a volume average particle diameter is 2 ?m to 5 ?m on a surface of the developing roll, and the voltage applying section applies an alternating voltage in which an alternating-current component is applied on a direct current component to the developing roll, the following expression being satisfied: 34?Toner Volume Average Particle Diameter [?m]×Alternating-Current Component Frequency [kHz]?60.
    Type: Application
    Filed: January 4, 2016
    Publication date: February 2, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Manabu FURUKI, Masahiro UCHIDA, Masashi IKEDA, Makoto KAMISAKI, Sakiko HIRAI, Teppei YAWADA
  • Patent number: 9557674
    Abstract: Provided is a toner set including at least a first brilliant toner that contains a brilliant pigment, and a second brilliant toner that contains a brilliant pigment and exhibits a different color from the first brilliant toner.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: January 31, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Sakiko Hirai, Shotaro Takahashi, Masaru Takahashi, Atsushi Sugitate, Shuji Sato
  • Publication number: 20160202622
    Abstract: An electrostatic charge image developing toner includes: first particles containing a brilliant pigment; and second particles not containing a brilliant pigment, wherein 80% by number or greater of the first particles has a circularity in a range of from 0.850 to 0.940, and 80% by number or greater of the second particles has a circularity of 0.950 or greater.
    Type: Application
    Filed: July 6, 2015
    Publication date: July 14, 2016
    Inventors: Sakiko HIRAI, Shotaro TAKAHASHI, Yukiaki NAKAMURA, Masaru TAKAHASHI
  • Patent number: 9389529
    Abstract: A brilliant toner includes a brilliant pigment, an azo yellow pigment, and a magenta pigment, wherein when a solid image in which a toner applied amount is 4.0 g/m2 is formed, color saturation of the image is 25 to 55, a hue angle is 65° to 95°, and lightness is 50 to 80.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: July 12, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Sakiko Hirai, Atsushi Sugitate, Masaru Takahashi, Shotaro Takahashi, Satomi Hara
  • Publication number: 20160195829
    Abstract: A toner set includes a brilliant toner including a brilliant pigment; and a chromatic toner including a coloring agent that is different from the brilliant pigment, wherein the toner set satisfies the following expression: 1.2?Q1/Q2?5.0 wherein Q1 represents an endothermic quantity of the brilliant toner and Q2 represents an endothermic quantity of the chromatic toner.
    Type: Application
    Filed: July 2, 2015
    Publication date: July 7, 2016
    Inventors: Shotaro TAKAHASHI, Atsushi SUGITATE, Masaru TAKAHASHI, Sakiko HIRAI, Satomi HARA
  • Patent number: 9383669
    Abstract: Provided is a brilliant toner containing a brilliant metallic pigment of which the surface is covered with at least one kind of metal oxides selected from a group consisting of silica, alumina, and titania, wherein the brilliant toner has a dielectric loss factor of from 10×10?3 to 60×10?3.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: July 5, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masaru Takahashi, Sakiko Hirai, Shotaro Takahashi, Atsushi Sugitate, Shuji Sato
  • Patent number: 9323175
    Abstract: A brilliant toner includes a metallic pigment, and a Fe content in the brilliant toner is from 0.001% by weight to 2% by weight.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: April 26, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Sakiko Hirai, Shotaro Takahashi, Masaru Takahashi, Atsushi Sugitate
  • Patent number: 9304425
    Abstract: A brilliant toner includes toner particles containing a brilliant pigment, and toner particles containing a yellow colorant without containing the brilliant pigment, wherein a ratio of the toner particles containing the yellow colorant without containing the brilliant pigment is 50% by number or greater.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: April 5, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Daisuke Noguchi, Sakiko Hirai, Masaru Takahashi, Atsushi Sugitate, Shuji Sato
  • Publication number: 20160085169
    Abstract: A brilliant toner includes a brilliant pigment, an azo yellow pigment, and a magenta pigment, wherein when a solid image in which a toner applied amount is 4.0 g/m2 is formed, color saturation of the image is 25 to 55, a hue angle is 65° to 95°, and lightness is 50 to 80.
    Type: Application
    Filed: January 23, 2015
    Publication date: March 24, 2016
    Inventors: Sakiko HIRAI, Atsushi SUGITATE, Masaru TAKAHASHI, Shotaro TAKAHASHI, Satomi HARA
  • Patent number: 9239532
    Abstract: A brilliant toner contains a metallic pigment and a binder resin, and content of Zn is from 0.00005% by weight to 1.0% by weight.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: January 19, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Sakiko Hirai, Atsushi Sugitate, Masaru Takahashi, Makoto Kamisaki, Satomi Hara
  • Publication number: 20160011533
    Abstract: An electrostatic charge image developing toner includes toner particles containing an aluminum pigment that is coated with silica and a binder resin, wherein the following formula is satisfied: A/B?0.040 where A represents a content (atom %) of a Si element of the toner particles and B represents a content (atom %) of a C element of the toner particles, A and B being measured by X-ray photoelectron spectroscopy (XPS).
    Type: Application
    Filed: January 9, 2015
    Publication date: January 14, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satomi HARA, Atsushi SUGITATE, Masaru TAKAHASHI, Shotaro TAKAHASHI, Sakiko HIRAI
  • Publication number: 20150277252
    Abstract: A brilliant toner includes toner particles containing a binder resin, a brilliant pigment, and particles selected from hollow particles and porous particles, wherein a relative dielectric constant of the toner particles is from 2.0 to 6.0.
    Type: Application
    Filed: August 26, 2014
    Publication date: October 1, 2015
    Inventors: Masaru TAKAHASHI, Satomi HARA, Sakiko HIRAI, Shotaro TAKAHASHI, Atsushi SUGITATE
  • Publication number: 20150268572
    Abstract: An electrostatic charge image developing toner includes flake shape toner particles containing a binder resin and a flake shape brilliant pigment, and the toner particles satisfying the following expression: 1?L?3 wherein L represents an average distance (?m) between a tangent line A of the toner particle that is orthogonal to a long axis direction of the toner particle and a tangent line B of the brilliant pigment that is parallel to the tangent line A and closest to the tangent line A.
    Type: Application
    Filed: January 5, 2015
    Publication date: September 24, 2015
    Inventors: Shotaro TAKAHASHI, Atsushi SUGITATE, Masaru TAKAHASHI, Shuji SATO, Satomi HARA, Sakiko HIRAI
  • Publication number: 20150111140
    Abstract: A brilliant toner includes toner particles containing a brilliant pigment, and toner particles containing a yellow colorant without containing the brilliant pigment, wherein a ratio of the toner particles containing the yellow colorant without containing the brilliant pigment is 50% by number or greater.
    Type: Application
    Filed: May 1, 2014
    Publication date: April 23, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Daisuke NOGUCHI, Sakiko HIRAI, Masaru TAKAHASHI, Atsushi SUGITATE, Shuji SATO
  • Publication number: 20150064615
    Abstract: A brilliant toner contains a metallic pigment and a binder resin, and content of Zn is from 0.00005% by weight to 1.0% by weight.
    Type: Application
    Filed: February 14, 2014
    Publication date: March 5, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Sakiko HIRAI, Atsushi SUGITATE, Masaru TAKAHASHI, Makoto KAMISAKI, Satomi HARA
  • Publication number: 20140348539
    Abstract: A brilliant toner includes toner particles which at least contain a brilliant pigment, a binder resin, and a release agent; and an external additive, wherein a ratio (X/Y) of a specific surface area X (m2/g), calculated from a projected image of the toner particles, to a BET specific surface area Y (m2/g) of the toner particles is from 0.3 to 1.0.
    Type: Application
    Filed: August 11, 2014
    Publication date: November 27, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shotaro TAKAHASHI, Masaru TAKAHASHI, Sakiko HIRAI, Atsushi SUGITATE, Shuji SATO
  • Publication number: 20140234765
    Abstract: A brilliant toner includes a metallic pigment, and a Fe content in the brilliant toner is from 0.001% by weight to 2% by weight.
    Type: Application
    Filed: October 1, 2013
    Publication date: August 21, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Sakiko HIRAI, Shotaro TAKAHASHI, Masaru TAKAHASHI, Atsushi SUGITATE
  • Publication number: 20140193751
    Abstract: Provided is a toner set including a brilliant toner containing a brilliant pigment and at least one kind of color toner containing a colorant, in which a ratio (G? A/G?B) of G?A to G?B satisfies a relationship of 1?G?A/G?B?10, when a storage modulus in 120° C. of the brilliant toner is G?A and a storage modulus in 120° C. of the color toner is G?B.
    Type: Application
    Filed: July 17, 2013
    Publication date: July 10, 2014
    Inventors: Atsushi SUGITATE, Masaru TAKAHASHI, Shotaro TAKAHASHI, Sakiko HIRAI, Shuji SATO
  • Publication number: 20140045113
    Abstract: Provided is a brilliant toner containing a brilliant metallic pigment of which the surface is covered with at least one kind of metal oxides selected from a group consisting of silica, alumina, and titania, wherein the brilliant toner has a dielectric loss factor of from 10×10?3 to 60×10?3.
    Type: Application
    Filed: February 28, 2013
    Publication date: February 13, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masaru TAKAHASHI, Sakiko HIRAI, Shotaro TAKAHASHI, Atsushi SUGITATE, Shuji SATO