Patents by Inventor Hirofumi Koga

Hirofumi Koga 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: 10943215
    Abstract: An equipment element repair management method for managing a repair operation of an equipment element that is attached to manufacturing equipment for manufacturing a product includes: performing a maintenance operation for the equipment element; determining whether or not a state of the equipment element after the maintenance operation is more improved than a predetermined state; transporting the equipment element of which the state is not more improved than the predetermined state to a repairer for performing the repair operation for the equipment element in a case where the state of the equipment element is not more improved than the predetermined state; and performing the repair operation of the transported equipment element in the repairer.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: March 9, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hirofumi Koga, Yuji Nakajima, Hitoshi Komatsu, Kazuyuki Yoshidomi, Manabu Ohuchi, Noritada Kawamoto
  • Publication number: 20200230948
    Abstract: Provided is a multilayer endless belt containing a base material layer having thereon an elastic layer in that order from an inner side of the multilayer endless belt, wherein in a width direction of the multilayer endless belt, an average thickness of both end regions of the base material layer is in the range of 120 to 150% with respect to an average thickness of a central region of the base material layer, and an average thickness of both end regions of the elastic layer is thinner than an average thickness of a central region of the elastic layer.
    Type: Application
    Filed: November 13, 2019
    Publication date: July 23, 2020
    Inventors: Junji Ujihara, Tsuyoshi Shimoda, Takayuki Suzuki, Hirofumi Koga
  • 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
  • Patent number: 10289045
    Abstract: A fixing belt contains a base layer made of a heat-resistant resin, an elastic layer made of an elastic material, and a release layer, laminated in this order. The elastic layer has a linear thermal expansion coefficient of ?4.0×10?4 (1/K) or more and 1.0×10?4 (1/K) or less.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: May 14, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Izumi Mukoyama, Hirofumi Koga, Naoko Uemura, Asao Matsushima
  • Publication number: 20190025811
    Abstract: There is provided an equipment element maintenance analysis system including: a history information acquirer that is attached with at least one equipment element and acquires, at a predetermined timing, operation history information on a piece of manufacturing equipment for manufacturing a product; an error rate calculator that calculates an error rate based on the number of errors related to each of the at least one equipment element, included in the operation history information; a maintenance determiner that determines maintenance necessity of each of the at least one equipment element; and a notifier that notifies an information item on an equipment element determined to require maintenance among the at least one equipment.
    Type: Application
    Filed: July 11, 2018
    Publication date: January 24, 2019
    Inventors: YUJI NAKAJIMA, HITOSHI KOMATSU, MANABU OHUCHI, KAZUYUKI YOSHIDOMI, NORITADA KAWAMOTO, HIROFUMI KOGA
  • Patent number: 10185260
    Abstract: A fixing belt includes: a base layer having heat resistance; an elastic layer disposed on the base layer and made of an elastic material; and a releasing layer disposed on the elastic layer, wherein a storage elastic modulus of the base layer is 3.8 to 4.8 GPa.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: January 22, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Izumi Mukoyama, Hirofumi Koga, Naoko Uemura, Asao Matsushima
  • Publication number: 20180365658
    Abstract: An equipment element repair management method for managing a repair operation of an equipment element that is attached to manufacturing equipment for manufacturing a product includes: performing a maintenance operation for the equipment element; determining whether or not a state of the equipment element after the maintenance operation is more improved than a predetermined state; transporting the equipment element of which the state is not more improved than the predetermined state to a repairer for performing the repair operation for the equipment element in a case where the state of the equipment element is not more improved than the predetermined state; and performing the repair operation of the transported equipment element in the repairer.
    Type: Application
    Filed: April 13, 2018
    Publication date: December 20, 2018
    Inventors: HIROFUMI KOGA, YUJI NAKAJIMA, HITOSHI KOMATSU, KAZUYUKI YOSHIDOMI, MANABU OHUCHI, NORITADA KAWAMOTO
  • Publication number: 20180368297
    Abstract: An equipment element maintenance management method for managing a maintenance operation for an equipment element that is attached to manufacturing equipment for manufacturing a product includes: acquiring operation history information of the manufacturing equipment at a predetermined timing; analyzing a tendency of a state of the equipment element based on the acquired operation history information; performing the maintenance operation for the equipment element of which the state is worse than a predetermined state; creating maintenance result information which is a result of the maintenance operation; and creating a repair operation instruction for performing an instruction of a repair operation for the equipment element of which the state after the maintenance operation is not more improved than the predetermined state based on the maintenance result information.
    Type: Application
    Filed: April 13, 2018
    Publication date: December 20, 2018
    Inventors: HIROFUMI KOGA, YUJI NAKAJIMA, KAZUYUKI YOSHIDOMI, HITOSHI KOMATSU, MANABU OHUCHI, NORITADA KAWAMOTO
  • 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: 10031454
    Abstract: A fixing belt according to the present invention has an endless shape and includes a base layer made of a heat-resistant resin; an elastic layer made of an elastic material; and a releasing layer which are stacked on one another in this order in which: the loss tangent tan ? of the elastic material at 20 Hz is 0.1 or smaller; and the fixing belt is mounted in a fixing device in the state where the belt is rotatably supported by two or more rollers including a heating roller, whereby favorable fixation performance and favorable separativeness relative to a recording medium can be achieved even in high speed image formation of an electrophotographic process.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: July 24, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Izumi Mukoyama, Hirofumi Koga, Go Yamaguchi, Asao Matsushima, Akira Ohira
  • Patent number: 9939764
    Abstract: A fixing belt includes a base layer, an elastic layer made of an elastic material, and a release layer. The elastic layer includes a first elastic layer disposed on a side of the base layer, and a second elastic layer disposed on a side of the release layer. The second elastic layer has a lower hardness than that of the first elastic layer. A Universal hardness of the second elastic layer is 3 to 7 N/mm2. A thickness ratio of the second elastic layer to the elastic layer is 5 to 15%.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: April 10, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hirofumi Koga, Izumi Mukoyama, Naoko Uemura
  • Publication number: 20180088500
    Abstract: A fixing belt includes: a base layer having heat resistance; an elastic layer disposed on the base layer and made of an elastic material; and a releasing layer disposed on the elastic layer, wherein a storage elastic modulus of the base layer is 3.8 to 4.8 GPa.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 29, 2018
    Inventors: Izumi MUKOYAMA, Hirofumi KOGA, Naoko UEMURA, Asao MATSUSHIMA
  • Patent number: 9811032
    Abstract: A fixing belt includes a base layer made of a heat-resistant resin, an elastic layer made of an elastic material, and a releasing layer, which are laminated in this order, and the difference between the maximum value and the minimum value of viscoelastic modulus within a range of 100 to 200° C. is 0.8% or less. Further, the viscoelastic modulus of the fixing belt within the range of 100 to 200° C. is within a range of 50 to 62%.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: November 7, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hirofumi Koga, Izumi Mukoyama, Naoko Uemura
  • Publication number: 20170308011
    Abstract: A fixing belt includes a base layer, an elastic layer made of an elastic material, and a release layer. The elastic layer includes a first elastic layer disposed on a side of the base layer, and a second elastic layer disposed on a side of the release layer. The second elastic layer has a lower hardness than that of the first elastic layer. A Universal hardness of the second elastic layer is 3 to 7 N/mm2. A thickness ratio of the second elastic layer to the elastic layer is 5 to 15%.
    Type: Application
    Filed: April 6, 2017
    Publication date: October 26, 2017
    Inventors: Hirofumi KOGA, Izumi MUKOYAMA, Naoko UEMURA
  • Publication number: 20170277090
    Abstract: Provided is a fixing belt wherein a base layer made of heat-resistant resin, an elastic layer made of an elastic material, and a release layer are laminated in this order, and the elastic layer has a linear thermal expansion coefficient of ?4.0×10?4 (1/K) or more and 1.0×10?4 (1/K) or less.
    Type: Application
    Filed: March 10, 2017
    Publication date: September 28, 2017
    Inventors: Izumi MUKOYAMA, Hirofumi KOGA, Naoko UEMURA, Asao MATSUSHIMA
  • Publication number: 20160363897
    Abstract: A fixing belt includes a base layer made of a heat-resistant resin, an elastic layer made of an elastic material, and a releasing layer, which are laminated in this order, and the difference between the maximum value and the minimum value of viscoelastic modulus within a range of 100 to 200° C. is 0.8% or less. Further, the viscoelastic modulus of the fixing belt within the range of 100 to 200° C. is within a range of 50 to 62%.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 15, 2016
    Inventors: Hirofumi Koga, Izumi Mukoyama, Naoko Uemura
  • Publication number: 20160223967
    Abstract: A fixing belt according to the present invention has an endless shape and includes a base layer made of a heat-resistant resin; an elastic layer made of an elastic material; and a releasing layer which are stacked on one another in this order in which: the loss tangent tan ? of the elastic material at 20 Hz is 0.1 or smaller; and the fixing belt is mounted in a fixing device in the state where the belt is rotatably supported by two or more rollers including a heating roller, whereby favorable fixation performance and favorable separativeness relative to a recording medium can be achieved even in high speed image formation of an electrophotographic process.
    Type: Application
    Filed: January 29, 2016
    Publication date: August 4, 2016
    Inventors: IZUMI MUKOYAMA, HIROFUMI KOGA, GO YAMAGUCHI, ASAO MATSUSHIMA, AKIRA OHIRA
  • Patent number: 7799500
    Abstract: Disclosed is an electrophotographic image forming method which comprises steps of forming a toner image on an image support, fixing the toner image on the image support in a fixing nip section of a fixing device employing a contact heating system and the toner contains a first releasing agent, a dynamic viscosity of the first releasing agent is 4-20 mm2/sec; and a fixing temperature in the fixing nip section of the fixing device is 75-100° C. higher than a melting point of the first releasing agent.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: September 21, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Makoto Kobayashi, Shingo Fujimoto, Takao Yamanouchi, Kazuya Isobe, Hirofumi Koga