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).

  • Publication number: 20130202337
    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: Application
    Filed: February 1, 2013
    Publication date: August 8, 2013
    Inventors: Aya SHIRAI, Asao MATSUSHIMA, Yoshiyasu MATSUMOTO, Ryuichi HIRAMOTO, Taiki AMEMIYA, Tatsuya NAGASE
  • Patent number: 8435715
    Abstract: Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pore apertures on a surface of the particle, and the method comprises steps of blocking the pore apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore apertures have been blocked, and mixing the resin coated carrier and the toner.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: May 7, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto, Takanari Kayamori, Junya Ueda
  • Publication number: 20130000836
    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: Application
    Filed: June 26, 2012
    Publication date: January 3, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yoshiyasu MATSUMOTO, Ryuichi HIRAMOTO, Aya SHIRAI, Asao MATSUSHIMA, Ken OHMURA
  • Publication number: 20120225379
    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: Application
    Filed: February 28, 2012
    Publication date: September 6, 2012
    Applicant: 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
  • Patent number: 8148041
    Abstract: An objective is to provide a carrier exhibiting stable charge providing ability in which sufficient charge can be provided to toner having a small particle diameter, and no image contamination such as fog caused by toner scattering via lack of electrification is generated. Another objective is to provide a carrier capable of maintaining a charging level of no interference for image formation even under the image forming condition at which a charging level for printing a number of prints continuously is difficult to be maintained. Disclosed is a carrier comprising a core particle made of ferrite possessing Mg and coated thereon, a resin, wherein the core particle has a ratio of the number of irregular-shaped core particles of at most 5%, based on the total number of core particles, and a surface of the core particle has grains having a maximum grain diameter of 2-5 ?m.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: April 3, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Makoto Kobayashi, Yoshiaki Kobayashi, Yoshiyasu Matsumoto
  • Publication number: 20120028186
    Abstract: Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pit apertures on a surface of the particle, and the method comprises steps of blocking the pit apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore openings have been blocked, and mixing the resin coated carrier and the toner.
    Type: Application
    Filed: July 18, 2011
    Publication date: February 2, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kosuke NAKAMURA, Hiroyuki KOZURU, Yoshiyasu MATSUMOTO, Takanari KAYAMORI, Junya UEDA
  • Patent number: 8080354
    Abstract: Disclosed is toner in which is used in an image formation process comprising the steps of transferring an image of toner formed on a photoreceptor onto a recording sheet, and removing any residual toner remaining on any of the photoreceptor, an intermediate transfer member and a secondary transfer member with a cleaning blade, the toner containing at least toner particles (A) and small particles (B), wherein the toner particles (A) have an average circularity of from 0.93 to 0.99 and a number-based median diameter (D50) of from 3.0 to 8.0 ?m, the small particles (B) have an average circularity of from 0.70 to 0.92 and a number-based median diameter (D50) of from 0.15 to 0.60 times that of the toner particles (A), and the surface energy of the toner particles (A) is different from that of the small particles (B).
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: December 20, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroyuki Kozuru, Yoshiyasu Matsumoto, Kosuke Nakamura, Futoshi Kadonome, Takanari Kayamori
  • Patent number: 8034525
    Abstract: An image forming method is disclosed, which includes steps of cleaning toner remaining on a photoreceptor surface by a cleaning blade which is arranged on counter direction to rotation direction of the photoreceptor, supplying a fatty acid metal salt onto the photoreceptor surface after the cleaning, spreading the supplied fatty acid metal salt on the photoreceptor surface by using a spreading blade which is arranged on trail direction to rotation direction of the photoreceptor, charging the photoreceptor by a charging member, exposing the photoreceptor to form a latent image, developing the latent image by a developer to form a toner image on the photoreceptor, and transferring the toner image onto an image receiving member by a transfer roller facing to the photoreceptor through the image receiving material, in which the toner comprises a binder resin and a colorant, in which the toner has a glass transition point of from 20 to 45° C.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: October 11, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yoshiyasu Matsumoto, Kenji Yamane, Hiroyuki Kozuru
  • Publication number: 20110117488
    Abstract: An objective is to provide a carrier exhibiting stable charge providing ability in which sufficient charge can be provided to toner having a small particle diameter, and no image contamination such as fog caused by toner scattering via lack of electrification is generated. Another objective is to provide a carrier capable of maintaining a charging level of no interference for image formation even under the image forming condition at which a charging level for printing a number of prints continuously is difficult to be maintained. Disclosed is a carrier comprising a core particle made of ferrite possessing Mg and coated thereon, a resin, wherein the core particle has a ratio of the number of irregular-shaped core particles of at most 5%, based on the total number of core particles, and a surface of the core particle has grains having a maximum grain diameter of 2-5 ?m.
    Type: Application
    Filed: January 24, 2011
    Publication date: May 19, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Makoto Kobayashi, Yoshiaki Kobayashi, Yoshiyasu Matsumoto
  • Patent number: 7862977
    Abstract: A method to form an image using a trickle developing system, wherein (a) the toner comprises colorant particles with a volume median diameter of 3 to 8 ?m having first inorganic particles on surfaces of the colorant particles to form toner particles; (b) the carrier comprises magnetic particles with a weight average particle diameter (D4) of 20 to 40 ?m having second inorganic particles on surfaces of the magnetic particles to form carrier particles; and (c) an area ratio of element (A) based on a total area of surfaces of the carrier particles is 0.5 to 3.0 area % determined by using an X-ray analysis, provided that element (A) represents one or more elements commonly contained in the first inorganic particles and in the second inorganic particles.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: January 4, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Makoto Kobayashi, Yoshiyasu Matsumoto
  • Patent number: 7741000
    Abstract: Disclosed is a method for forming color image, in which one of the yellow, magenta, cyan and black toners is a high water content toner, and one of the yellow, magenta, cyan and black toners is a toner low water content toner, water content of the high water content toner is 1.2 to 2.5% by weight based on the high water content toner, and water content of the low water content toner is 0.1 to 1.2% by weight based on the low water content toner.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: June 22, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tatsuya Nagase, Meizo Shirose, Naohiro Hirose, Asao Matsushima, Yoshiyasu Matsumoto, Shiro Hirano
  • Publication number: 20100151378
    Abstract: Disclosed is toner in which is used in an image formation process comprising the steps of transferring an image of toner formed on a photoreceptor onto a recording sheet, and removing any residual toner remaining on any of the photoreceptor, an intermediate transfer member and a secondary transfer member with a cleaning blade, the toner containing at least toner particles (A) and small particles (B), wherein the toner particles (A) have an average circularity of from 0.93 to 0.99 and a number-based median diameter (D50) of from 3.0 to 8.0 ?m, the small particles (B) have an average circularity of from 0.70 to 0.92 and a number-based median diameter (D50) of from 0.15 to 0.60 times that of the toner particles (A), and the surface energy of the toner particles (A) is different from that of the small particles (B).
    Type: Application
    Filed: December 7, 2009
    Publication date: June 17, 2010
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroyuki KOZURU, Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Futoshi KADONOME, Takanari KAYAMORI
  • Patent number: 7727695
    Abstract: An electrophotographic toner is disclosed, comprising a binding resin, a colorant and a releasing agent, wherein the releasing agent comprises a first releasing agent component and a second releasing agent component, the first releasing agent component is a straight chain hydrocarbon compound exhibiting a melting point of 50 to 100° C. and the second releasing agent component is a branched hydrocarbon compound exhibiting a melting point of 50 to 100° C., and the second releasing agent component accounting for 5% to 90% by mass of the total amount of the first and second releasing agent components.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: June 1, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Shiro Hirano, Yoshiyasu Matsumoto, Masaaki Kondo, Junya Onishi, Aya Shirai
  • Publication number: 20090035684
    Abstract: An image forming method is disclosed, which includes steps of cleaning toner remaining on a photoreceptor surface by a cleaning blade which is arranged on counter direction to rotation direction of the photoreceptor, supplying a fatty acid metal salt onto the photoreceptor surface after the cleaning, spreading the supplied fatty acid metal salt on the photoreceptor surface by using a spreading blade which is arranged on trail direction to rotation direction of the photoreceptor, charging the photoreceptor by a charging member, exposing the photoreceptor to form a latent image, developing the latent image by a developer to form a toner image on the photoreceptor, and transferring the toner image onto an image receiving member by a transfer roller facing to the photoreceptor through the image receiving material, in which the toner comprises a binder resin and a colorant, in which the toner has a glass transition point of from 20 to 45° C.
    Type: Application
    Filed: July 7, 2008
    Publication date: February 5, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yoshiyasu MATSUMOTO, Kenji YAMANE, Hiroyuki KOZURU
  • Publication number: 20080070150
    Abstract: An objective is to provide a carrier exhibiting stable charge providing ability in which sufficient charge can be provided to toner having a small particle diameter, and no image contamination such as fog caused by toner scattering via lack of electrification is generated. Another objective is to provide a carrier capable of maintaining a charging level of no interference for image formation even under the image forming condition at which a charging level for printing a number of prints continuously is difficult to be maintained. Disclosed is a carrier comprising a core particle made of ferrite possessing Mg and coated thereon, a resin, wherein the core particle has a ratio of the number of irregular-shaped core particles of at most 5%, based on the total number of core particles, and a surface of the core particle has grains having a maximum grain diameter of 2-5 ?m.
    Type: Application
    Filed: August 8, 2007
    Publication date: March 20, 2008
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Makoto Kobayashi, Yoshiaki Kobayashi, Yoshiyasu Matsumoto
  • Publication number: 20080038654
    Abstract: An electrophotographic developer comprising a toner and a carrier is disclosed. The contains a toner binder resin, a colorant and a releasing agent, and a carrier contains magnetic particles dispersed in a carrier binder resin, wherein the releasing agent contains a first releasing agent component of a linear-chain hydrocarbon compound having a melting point of from 50 to 100° C. in a ratio of from 10 to 95% by weight and a second releasing agent component comprising a branched-chain structure hydrocarbon compound having a melting point of from 50 to 100° C. in a ratio of from 5 to 90% by weight, and the carrier has a shape coefficient SF-1 of from 1.0 to 1.2, a shape-coefficient SF-2 of from 1.1 to 2.5 and a volume based median diameter of from 10 to 100 ?m.
    Type: Application
    Filed: July 18, 2007
    Publication date: February 14, 2008
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroshi YAMAZAKI, Ken OHMURA, Yoshiyasu MATSUMOTO, Shiro HIRANO
  • Publication number: 20070238041
    Abstract: A method to form an image using a trickle developing system, wherein (a) the toner comprises colorant particles with a volume median diameter of 3 to 8 ?m having first inorganic particles on surfaces of the colorant particles to form toner particles; (b) the carrier comprises magnetic particles with a weight average particle diameter (D4) of 20 to 40 ?m having second inorganic particles on surfaces of the magnetic particles to form carrier particles; and (c) an area ratio of element (A) based on a total area of surfaces of the carrier particles is 0.5 to 3.0 area % determined by using an X-ray analysis, provided that element (A) represents one or more elements commonly contained in the first inorganic particles and in the second inorganic particles.
    Type: Application
    Filed: April 3, 2007
    Publication date: October 11, 2007
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Makoto KOBAYASHI, Yoshiyasu MATSUMOTO
  • Patent number: 7270923
    Abstract: An image forming method for forming a full color toner image by overlaying four color electrostatic image developing toners of black, yellow, magenta and cyan, wherein at least one of the four color electrostatic image developing toners is a toner containing a large diameter external additive in a larger amount and at least one is a toner containing the large diameter external additive in a smaller amount, in which the primary particle diameter of the large diameter external additive is from 150 nm to 2,000 nm, the content of the large diameter external additive in the toner containing the large diameter external additive in larger amount is from 0.06% by weight to 4.0% by weight and the content of the large diameter external additive in the toner containing the large diameter external additive in the smaller amount is not more than 0.05% by weight.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: September 18, 2007
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yoshiyasu Matsumoto, Meizo Shirose, Naohiro Hirose, Tatsuya Nagase, Asao Matsushima, Shiro Hirano
  • Publication number: 20070184374
    Abstract: An electrophotographic toner is disclosed, comprising a binding resin, a colorant and a releasing agent, wherein the releasing agent comprises a first releasing agent component and a second releasing agent component, the first releasing agent component is a straight chain hydrocarbon compound exhibiting a melting point of 50 to 100° C. and the second releasing agent component is a branched hydrocarbon compound exhibiting a melting point of 50 to 100° C., and the second releasing agent component accounting for 5% to 90% by mass of the total amount of the first and second releasing agent components.
    Type: Application
    Filed: January 23, 2007
    Publication date: August 9, 2007
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Shiro HIRANO, Yoshiyasu MATSUMOTO, Masaaki KONDO, Junya ONISHI, Aya SHIRAI
  • Patent number: 7018763
    Abstract: The invention relates to a static latent image developing toner comprising toner particles, each of the toner particles comprising a toner intermediate particle having inorganic oxide particles on the surface, wherein a surface existence density of the inorganic oxide particle having a feret's diameter of 110 nm to 160 nm on the toner intermediate particle is 5 to 50 per ?m2, and relates to a developer comprising the toner and an image forming method utilizing the toner.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: March 28, 2006
    Assignee: Konica Corporation
    Inventors: Yoshiyasu Matsumoto, Ken Ohmura, Tatsuya Nagase, Kaori Soeda