Patents by Inventor Yasuhisa MOROOKA

Yasuhisa MOROOKA 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).

  • Electrostatic charge image developer, developer cartridge, and process cartridge
    Patent number: 9726998
    Abstract: An electrostatic charge image developer includes an electrostatic charge image developing toner that includes toner particles, and an external additive which is added to the toner particles and which includes silica particles whose compression aggregation degree is from 60% to 95% and particle compression ratio is from 0.20 to 0.40, and a carrier for developing an electrostatic charge image that has a core including a magnetic member in a binder resin for a core and a coating layer which coders a surface or the core and which includes a resin for a coating layer and has a surface roughness Ra of from 0.25 ?m to 0.4 ?m.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: August 8, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuhisa Morooka, Hiroyoshi Okuno, Satoshi Inoue, Yoshifumi Iida, Tomohito Nakajima, Yuka Zenitani, Yoshifumi Eri, Takeshi Iwanaga, Sakae Takeuchi, Shunsuke Nozaki, Yasuo Kadokura
  • Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge
    Patent number: 9726994
    Abstract: An electrostatic charge image developing toner includes toner particles containing a binder resin, and an external additive including silica particles whose compression aggregation degree is from 60% to 95% and particle compression ratio is from 0.20 to 0.40 and polishing agent particles.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: August 8, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoshifumi Eri, Hiroyoshi Okuno, Satoshi Inoue, Yoshifumi Iida, Tomohito Nakajima, Yuka Zenitani, Takeshi Iwanaga, Sakae Takeuchi, Shunsuke Nozaki, Yasuo Kadokura, Yasuhisa Morooka
  • SILICA PARTICLE AND METHOD OF PREPARING SILICA PARTICLE
    Publication number: 20170073236
    Abstract: A silica particle has a compression and aggregation degree of from 60% to 95% and a particle compression ratio of from 0.20 to 0.40.
    Type: Application
    Filed: January 20, 2016
    Publication date: March 16, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hiroyoshi OKUNO, Satoshi INOUE, Yoshifumi IIDA, Tomohito NAKAJIMA, Yuka ZENITANI, Yoshifumi ERI, Yasuo KADOKURA, Yasuhisa MOROOKA, Shunsuke NOZAKI, Takeshi IWANAGA, Sakae TAKEUCHI
  • Image forming apparatus with oriented flake shape toner
    Patent number: 9244392
    Abstract: An image forming apparatus includes a latent image forming unit that forms a latent image on a photoreceptor, a developing unit that accommodates a developer containing flake shape toner particles and develops the latent image using the developer to form a toner image on a surface of the photoreceptor, a transfer unit, a bias applying unit, and a fixing unit, wherein the flake shape toner particles have an average major axis length of from 7 ?m to 20 ?m and an average thickness of from 1 ?m to 3 ?m and contain a flake shape metallic pigment.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: January 26, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masataka Kuribayashi, Takafumi Koide, Katsuyuki Kitajima, Makoto Kamisaki, Yasuhisa Morooka
  • IMAGE FORMING APPARATUS WITH ORIENTED FLAKE SHAPE TONER
    Publication number: 20150248081
    Abstract: An image forming apparatus includes a latent image forming unit that forms a latent image on a photoreceptor, a developing unit that accommodates a developer containing flake shape toner particles and develops the latent image using the developer to form a toner image on a surface of the photoreceptor, a transfer unit, a bias applying unit, and a fixing unit, wherein the flake shape toner particles have an average major axis length of from 7 ?m to 20 ?m and an average thickness of from 1 ?m to 3 ?m and contain a flake shape metallic pigment.
    Type: Application
    Filed: July 16, 2014
    Publication date: September 3, 2015
    Inventors: Masataka KURIBAYASHI, Takafumi KOIDE, Katsuyuki KITAJIMA, Makoto KAMISAKI, Yasuhisa MOROOKA