Patents by Inventor Yoshiyasu Matsumoto

Yoshiyasu Matsumoto 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: 11130862
    Abstract: A silicone rubber composition is a silicone rubber composition, in a fixing member having a rubber member on a surface, for forming the rubber member, and an integrated value of a high-molecular component from 32 minutes to 37 minutes of retention time in measurement of gas-chromatography mass spectrometry (GC/MS method) conducted under a predetermined condition is 3.0 or more.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: September 28, 2021
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroyuki Yasukawa, Hirofumi Koga, Yoshiyasu Matsumoto
  • Patent number: 10976689
    Abstract: An intermediate transfer member includes: a base layer; an elastic layer that is disposed on the base layer; and a surface layer that is disposed on the elastic layer, wherein, when a breaking elongation of the surface layer is Ah, and a breaking elongation of the elastic layer is Ad, Ad/Ah=4 to 100 is satisfied, and when a linear expansion coefficient of the surface layer is Bh, and a linear expansion coefficient of the elastic layer is Bd, Bd/Bh=0.8 to 2 is satisfied.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: April 13, 2021
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroyuki Yasukawa, Yoshiyasu Matsumoto, Keita Miyazaki, Akiko Kawamura
  • Publication number: 20210079249
    Abstract: A precoat liquid used in an intermediate-transfer image forming method in which an actinic radiation-curable ink and an intermediate transfer member are used, the precoat liquid being applied onto a surface of the intermediate transfer member before the actinic radiation-curable ink is applied onto the surface of the intermediate transfer member, includes a water-soluble organic solvent having two or more hydroxyl groups per molecule. The water-soluble organic solvent has a C value of more than 0.03, the C value being calculated using Expression (1).
    Type: Application
    Filed: August 24, 2020
    Publication date: March 18, 2021
    Inventors: Akihiro HONYA, Yoshiyasu MATSUMOTO, Akiko KAWAMURA, Hiroyuki YASUKAWA
  • Publication number: 20200379374
    Abstract: The present invention relates to a single-layer or multilayer intermediate transfer member. The intermediate transfer member has a surface on which an intermediate image is to be formed, the surface containing a resin chemically modified with a hydrophilic functional group.
    Type: Application
    Filed: May 13, 2020
    Publication date: December 3, 2020
    Inventors: Akihiro HONYA, Yoshiyasu MATSUMOTO, Akiko KAWAMURA, Shingo FUJIMOTO, Hiroyuki YASUKAWA
  • Publication number: 20200333730
    Abstract: An intermediate transfer member includes: a base layer; an elastic layer that is disposed on the base layer; and a surface layer that is disposed on the elastic layer, wherein, when a breaking elongation of the surface layer is Ah, and a breaking elongation of the elastic layer is Ad, Ad/Ah=4 to 100 is satisfied, and when a linear expansion coefficient of the surface layer is Bh, and a linear expansion coefficient of the elastic layer is Bd, Bd/Bh=0.8 to 2 is satisfied.
    Type: Application
    Filed: April 7, 2020
    Publication date: October 22, 2020
    Inventors: Hiroyuki YASUKAWA, Yoshiyasu MATSUMOTO, Keita MIYAZAKI, Akiko KAWAMURA
  • Publication number: 20200017684
    Abstract: A silicone rubber composition is a silicone rubber composition, in a fixing member having a rubber member on a surface, for forming the rubber member, and an integrated value of a high-molecular component from 32 minutes to 37 minutes of retention time in measurement of gas-chromatography mass spectrometry (GC/MS method) conducted under a predetermined condition is 3.0 or more.
    Type: Application
    Filed: June 20, 2019
    Publication date: January 16, 2020
    Inventors: Hiroyuki YASUKAWA, Hirofumi KOGA, Yoshiyasu MATSUMOTO
  • Publication number: 20190250538
    Abstract: There is provided a silicone rubber composition forming a rubber member on a surface of a fixing member which is used in an electrophotographic image forming apparatus. The silicone rubber composition includes 1.5 or less of a low molecular weight component by a cumulative amount measured from 10 minutes to 32 minutes after starting retention in a head space gas chromatography measurement under a predetermined condition. The silicone rubber composition further includes 2.2 or more of a high molecular weight component by a cumulative amount from 32 minutes to 37 minutes after starting retention in a head space gas chromatography measurement under the predetermined condition.
    Type: Application
    Filed: January 16, 2019
    Publication date: August 15, 2019
    Inventors: Yoshiyasu MATSUMOTO, Hiroyuki Yasukawa, Hirofumi Koga
  • Publication number: 20180250896
    Abstract: A manufacturing method for a silicone rubber molded body that is to be used in an electrophotographic image forming apparatus includes a heating process of a precursor of a silicone rubber molded body. The heating process includes heating the precursor of a silicone rubber molded body and externally introducing an environmental gas and discharging the environmental gas to outside, to reduce an amount of a low molecular weight compound remaining in the precursor of a silicone rubber molded body.
    Type: Application
    Filed: February 28, 2018
    Publication date: September 6, 2018
    Inventors: Yoshiyasu Matsumoto, Hiroyuki Yasukawa, Hirofumi Koga
  • Patent number: 9354536
    Abstract: A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: May 31, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kosuke Nakamura, Yoshiyasu Matsumoto, Satoshi Uchino, Hidehito Haruki, Hiroyuki Kozuru
  • Patent number: 9063442
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 0.60 to 0.95.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: June 23, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto
  • Patent number: 8995887
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 1.05 to 1.65.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: March 31, 2015
    Assignee: Konica Minolta, Inc.
    Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto
  • Publication number: 20150010862
    Abstract: According to one implementation, a two-component developer for developing an electrostatic latent image includes a toner particle and a carrier particle. The toner particle includes an external additive on a surface of a toner mother particle including at least a binding resin. The carrier particle includes a resin covering layer on a surface of a carrier core material particle. The resin covering layer includes a covering resin obtained by polymerizing at least an isobutyl methacrylate monomer and includes a nitrogen atom as an atom composing the covering resin.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
  • Publication number: 20140363762
    Abstract: A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 11, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Kosuke NAKAMURA, Yoshiyasu MATSUMOTO, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
  • Patent number: 8900786
    Abstract: A plurality of image parts, each having a different gloss level, are formed on the same recording material by electrophotographic technology. The plurality of gloss levels are visually recognized due to the plurality of image parts. The image forming method includes: developing electrostatic latent images on respective image carriers using a high softening point clear toner and a low softening point clear toner, to form a toner image by the high softening point clear toner and a toner image by the low softening point clear toner; transferring the toner images onto a recording material; and heat-fixing the toner image for low gloss and the toner image for high gloss transferred and formed onto the recording material, wherein a softening point Tm(a) of the high softening point clear toner and a softening point Tm(b) of the low softening point clear toner satisfy Tm(a)?Tm(b)>6° C.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: December 2, 2014
    Assignee: Konica Minolta, Inc.
    Inventors: Yoshiyasu Matsumoto, Aya Shirai, Ryuichi Hiramoto, Taiki Amemiya
  • Patent number: 8844832
    Abstract: The non-contact information recording medium is made by forming the antenna circuit and connecting it to the IC module through connection terminals at the same time. This provides a high degree of freedom of patterning of the antenna circuit. The antenna circuit is formed on a recording substrate, in which an IC module has been embedded. A foil-bonding resin layer is formed on the connection terminals of the recording substrate, with a toner containing a binder resin by an electrophotographic method. Then a conductive foil is brought into contact with the foil-bonding resin layer to bond the foil to the resin layer, to connect the antenna circuit to the connection terminals and form the antenna circuit composed of the conductive foil.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: September 30, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yoshiyasu Matsumoto, Ryuichi Hiramoto, Aya Shirai, Asao Matsushima, Ken Ohmura
  • Patent number: 8824949
    Abstract: An image forming method includes: performing a first gloss processing and a second gloss processing. The first gloss processing includes: heating and pressing a processed body which supports a first toner layer containing at least a clear toner [X] onto a first surface of a recording material, while allowing the first toner layer to be closely adhered to a gloss processing belt; and cooling the same. The second gloss processing includes heating and pressing a processed body which supports a second toner layer containing at least a clear toner [Y] onto a second surface of the recording material, while allowing the second toner layer to be closely adhered to the gloss processing belt; and cooling the same. Here, a storage elastic modulus G? X (150) at 150° C. of the clear toner [X] is lower than a storage elastic modulus G? Y (150) at 150° C. of the clear toner [Y].
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: September 2, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Aya Shirai, Asao Matsushima, Yoshiyasu Matsumoto, Ryuichi Hiramoto, Taiki Amemiya, Tatsuya Nagase
  • Publication number: 20140205327
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 0.60 to 0.95.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 24, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Kosuke NAKAMURA, Hiroyuki Kozuru, Yoshiyasu Matsumoto
  • Publication number: 20140205326
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 1.05 to 1.65.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 24, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Kosuke NAKAMURA, Hiroyuki KOZURU, Yoshiyasu MATSUMOTO
  • Publication number: 20130344432
    Abstract: A plurality of image parts, each having a different gloss level, are formed on the same recording material by electrophotographic technology. The plurality of gloss levels are visually recognized due to the plurality of image parts. The image forming method includes: developing electrostatic latent images on respective image carriers using a high softening point clear toner and a low softening point clear toner, to form a toner image by the high softening point clear toner and a toner image by the low softening point clear toner; transferring the toner images onto a recording material; and heat-fixing the toner image for low gloss and the toner image for high gloss transferred and formed onto the recording material, wherein a softening point Tm(a) of the high softening point clear toner and a softening point Tm(b) of the low softening point clear toner satisfy Tm(a)?Tm(b)>6° C.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 26, 2013
    Inventors: Yoshiyasu MATSUMOTO, Aya SHIRAI, Ryuichi HIRAMOTO, Taiki AMEMIYA
  • Patent number: 8507169
    Abstract: A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: August 13, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoko Mine, Mikihiko Sukeno, Tatsuya Nagase, Tomomi Oshiba, Hiroyuki Kozuru, Saburou Hiraoka, Yoshiyasu Matsumoto, Kosuke Nakamura, Hitomi Motani, Takanari Kayamori