Patents by Inventor Hideharu KUWABARA

Hideharu KUWABARA 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).

  • Toner container, image forming unit, and image forming apparatus
    Patent number: 11256189
    Abstract: A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source. The toner container including a container body, and a cyan toner stored in the container body. The cyan toner includes a binder resin, at least one pigment, a charge control agent, and an external additive. The at least one pigment includes at least Pigment Blue. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy: 30.04?L*?33.68, ?1.75?a*?0.71, and ?47.47?b*??45.08.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: February 22, 2022
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Hideharu Kuwabara, Shin Yamada
  • Toner container, image forming unit, and image forming apparatus
    Patent number: 10948840
    Abstract: A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source includes a container body, and a cyan toner stored in the container body. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy 26.94?L*?34.84, ?5.13?a*?3.83, and ?47.47?b*??36.78.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: March 16, 2021
    Assignee: Oki Data Corporation
    Inventors: Hideharu Kuwabara, Shin Yamada
  • TONER CONTAINER, IMAGE FORMING UNIT, AND IMAGE FORMING APPARATUS
    Publication number: 20210011392
    Abstract: A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source. The toner container including a container body, and a cyan toner stored in the container body. The cyan toner includes a binder resin, at least one pigment, a charge control agent, and an external additive. The at least one pigment includes at least Pigment Blue. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy: 30.04?L*?33.68, ?1.75?a*?0.71, and ?47.47?b*??45.08.
    Type: Application
    Filed: September 21, 2020
    Publication date: January 14, 2021
    Applicant: Oki Data Corporation
    Inventors: Hideharu KUWABARA, Shin YAMADA
  • TONER CONTAINER, IMAGE FORMING UNIT, AND IMAGE FORMING
    Publication number: 20200166860
    Abstract: A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source includes a container body, and a cyan toner stored in the container body. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy 26.94?L*?34.84, ?5.13?a*?3.83, and ?47.47?b*??36.78.
    Type: Application
    Filed: October 18, 2019
    Publication date: May 28, 2020
    Applicant: Oki Data Corporation
    Inventors: Hideharu KUWABARA, Shin YAMADA
  • Toner, developing agent container, image forming unit, and image forming apparatus
    Patent number: 10401749
    Abstract: Provided are a toner, and a developing agent container, an image forming unit and an image forming apparatus including the toner. The toner includes a toner particle. The toner particle includes at least one brilliant pigment particle, binder resin containing the brilliant pigment particle, and a parting agent dispersed in the binder resin, wherein a hydrophobicity degree of the brilliant pigment particle is in a range from 61.2 to 92.7.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: September 3, 2019
    Assignee: Oki Data Corporation
    Inventor: Hideharu Kuwabara
  • TONER, TONER CONTAINER, DEVELOPING UNIT, AND IMAGE FORMING APPARATUS
    Publication number: 20190196350
    Abstract: A toner includes a brilliant pigment and binder resin. The toner has a weight-average molecular weight that is equal to or greater than 19601 and equal to or smaller than 55938.
    Type: Application
    Filed: December 20, 2018
    Publication date: June 27, 2019
    Inventor: Hideharu KUWABARA
  • TONER, DEVELOPING AGENT CONTAINER, IMAGE FORMING UNIT, AND IMAGE FORMING APPARATUS
    Publication number: 20180348657
    Abstract: Provided are a toner, and a developing agent container, an image forming unit and an image forming apparatus including the toner. The toner includes a toner particle. The toner particle includes at least one brilliant pigment particle, binder resin containing the brilliant pigment particle, and a parting agent dispersed in the binder resin, wherein a hydrophobicity degree of the brilliant pigment particle is in a range from 61.2 to 92.7.
    Type: Application
    Filed: May 9, 2018
    Publication date: December 6, 2018
    Inventor: Hideharu KUWABARA
  • TONER, DEVELOPER CONTAINER, IMAGE FORMING UNIT, AND IMAGE FORMING APPARATUS
    Publication number: 20180143553
    Abstract: A toner includes: a binder resin; a release agent; and a brilliant pigment including aluminum. A content of aluminum in the toner is greater than or equal to 6.7% and less than or equal to 17.2%, the content of aluminum being measured by an energy dispersive X-ray fluorescence spectrometer.
    Type: Application
    Filed: November 16, 2017
    Publication date: May 24, 2018
    Inventor: Hideharu KUWABARA
  • Developer, developer storage body, developing device and image forming apparatus
    Patent number: 9618866
    Abstract: A developer includes a binder resin, a releasing agent; and a brilliant pigment. A peak endothermic amount of the developer measured using a differential scanning calorimetry (DSC) in a second temperature rising process is in a range from 6.20 to 14.40 J/g.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: April 11, 2017
    Assignee: Oki Data Corporation
    Inventor: Hideharu Kuwabara
  • DEVELOPER, DEVELOPER STORAGE BODY, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
    Publication number: 20160282738
    Abstract: A developer includes a binder resin, a releasing agent; and a brilliant pigment. A peak endothermic amount of the developer measured using a differential scanning calorimetry (DSC) in a second temperature rising process is in a range from 6.20 to 14.40 J/g.
    Type: Application
    Filed: February 19, 2016
    Publication date: September 29, 2016
    Inventor: Hideharu KUWABARA
  • DEVELOPER, DEVELOPER CONTAINER UNIT, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS
    Publication number: 20150072279
    Abstract: Developer includes a toner base particle and an outer additive agent attached to a surface of the toner base particle. The outer additive agent includes at least a composite oxide particle containing titanium dioxide and silicon dioxide and a melamine resin particle.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 12, 2015
    Inventor: Hideharu KUWABARA