Patents by Inventor Yuusuke Furuichi

Yuusuke Furuichi 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: 11487231
    Abstract: A heater includes a first heat generator and a second heat generator each of which has a hypothetical center line that divides each of the first heat generator and the second heat generator into a first section and a second section. A first conductor connects a first electrode to the first heat generator and the second heat generator. A second conductor connects a second electrode to the first heat generator and the second heat generator. A first primary connector connects the first conductor to the first section of the first heat generator. A second primary connector connects the first conductor to the second section of the second heat generator. A first secondary connector connects the second conductor to the first heat generator. A second secondary connector connects the second conductor to the second heat generator.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: November 1, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Inoue, Yuusuke Furuichi
  • Publication number: 20220308511
    Abstract: A pressing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form and includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator is to slide. The slide surface has a smaller surface roughness than a surface roughness of the sliding surface. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant between the rotator and the secured member has a consistency of 275 or less.
    Type: Application
    Filed: March 15, 2022
    Publication date: September 29, 2022
    Inventors: Yukimichi SOMEYA, Hiroyuki SHIMADA, Daisuke INOUE, Yuusuke FURUICHI, Satoshi TOHKAI, Yumiko HAYASHI
  • Patent number: 11454917
    Abstract: An image forming apparatus includes an image bearer, a protectant applicator, a heating device, and a protectant biasing member. The protectant applicator applies protectant to the image bearer. The heating device includes a heater including a base, a heat generator, an electrode, and a conductor coupling the heat generator to the electrode. The heater has a first position and a second position having a higher temperature than the first position. These are symmetrical to each other with respect to a longitudinal center of a heat generation area of the heater. The protectant biasing member biases the protectant to the protectant applicator with a first biasing force at a position closer to the first position than to the second position and with a second biasing force larger than the first biasing force at a position closer to the second position than to the first, and the protectant contacts the protectant applicator.
    Type: Grant
    Filed: June 2, 2021
    Date of Patent: September 27, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kenji Yabe, Yuusuke Furuichi, Tomoya Adachi
  • Publication number: 20220299919
    Abstract: A fixing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form. The rotator includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is disposed inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator is to slide. The slide surface has a smaller surface roughness in a sliding direction of the rotator than a surface roughness of the sliding surface in the sliding direction of the rotator. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant is provided between the rotator and the secured member.
    Type: Application
    Filed: March 4, 2022
    Publication date: September 22, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Daisuke INOUE, Yuusuke FURUICHI, Hiroyuki SHIMADA, Yukimichi SOMEYA, Satoshi TOHKAI, Yumiko HAYASHI
  • Publication number: 20220299920
    Abstract: A fixing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form. The rotator includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is disposed inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator slides. The slide surface has a larger hardness than a hardness of the sliding surface of the rotator. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant is provided between the rotator and the secured member.
    Type: Application
    Filed: March 11, 2022
    Publication date: September 22, 2022
    Inventors: Hiroyuki SHIMADA, Yukimichi SOMEYA, Yuusuke FURUICHI, Daisuke INOUE, Satoshi TOHKAI, Yumiko HAYASHI
  • Patent number: 11449002
    Abstract: An image forming apparatus includes a heating device including a heater, a developing device, and an airflow generation device. The heater includes a base, a heat generator, an electrode portion, and conductive portions. The conductive portions are disposed on one side and another side in a longitudinal direction in a heat generation region and spaced apart in a lateral direction intersecting the longitudinal direction. A maximum total value among total values of squares of current flowing in the conductive portions at longitudinal positions on the one side is larger than that on said another side. The developing device includes a rotating member and sliding portions. A sliding portion having highest temperature in operation is disposed on one side of the developing device being same as the one side of the heater in the longitudinal direction. The airflow generation device generates an airflow toward the one side of the developing device.
    Type: Grant
    Filed: September 21, 2021
    Date of Patent: September 20, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kei Saito, Tomoya Adachi, Yuusuke Furuichi
  • Publication number: 20220291610
    Abstract: A fixing device includes a fixing rotator, an opposing rotator, a temperature detector, and a support. The fixing rotator has a hollow and heats an image to fix the image onto a recording medium. The opposing rotator forms a fixing nip between the fixing rotator and the opposing rotator. The temperature detector includes an exposed conductive portion. The support has conductivity and is disposed in the hollow of the fixing rotator to support the fixing rotator at the fixing nip. The support has at least one of a recessed portion or an opening at a position facing the exposed conductive portion of the temperature detector.
    Type: Application
    Filed: January 24, 2022
    Publication date: September 15, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Takayuki SEKI, Yuusuke FURUICHI
  • Publication number: 20220283531
    Abstract: An image forming apparatus includes a heating device, a rotator, and a blade. The heating device includes a heater extending in a direction orthogonal to a conveyance direction of a recording medium. The heater includes a heat generator and generates a larger heat amount at one end than at a center. The blade includes a rubbing portion extending in the direction. Both ends of the rubbing portion face both ends of the heater. The rotator and the blade are configured such that a friction force between the rotator and one end of the rubbing portion is smaller than a friction force between the rotator and the center of the rubbing portion in the direction.
    Type: Application
    Filed: January 10, 2022
    Publication date: September 8, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Naohiro KUMAGAI, Tomoya ADACHI, Yuusuke FURUICHI
  • Publication number: 20220283530
    Abstract: A planar heater includes a base, a resister pattern, a conductor pattern, a power supply electrode, and a base pattern. The base includes a surface portion made of an insulative material. The resistor pattern is on the base. The conductor pattern is on the base and electrically coupled to the resistor pattern. The power supply electrode is electrically coupled to the conductor pattern. The base pattern is on the base and made of a material different from a material of the surface portion of the base to print visible identification information.
    Type: Application
    Filed: December 8, 2021
    Publication date: September 8, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomoya ADACHI, Yuusuke FURUICHI, Yukimichi SOMEYA
  • Patent number: 11435682
    Abstract: A heater includes a base, a plurality of heat generators arranged on the base in parallel to a longitudinal direction of the base, a plurality of electrodes on the base, and conductor paths disposed on the base. The conductor paths are electrically connected to the heat generators and the electrodes. The conductor paths include a main conductor path connected to one of the electrodes and a branch conductor path branched from the main conductor path. At least a part of the branch conductor path has a lower electrical resistance per unit length than an electrical resistance per unit length of the main conductor path.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: September 6, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masahiro Samei, Tomoya Adachi, Yuusuke Furuichi, Yukimichi Someya, Daisuke Inoue
  • Publication number: 20220179338
    Abstract: A heating device includes a first temperature sensor and a second temperature sensor that detect a temperature of at least one of a first rotator, a second rotator, and a heater that heats at least one of the first rotator and the second rotator. The first temperature sensor is disposed outboard from an increased conveyance span where an increased size sheet having an increased width in a longitudinal direction of the heater is conveyed. The second temperature sensor is disposed outboard from a decreased conveyance span where a decreased size sheet having a decreased width in the longitudinal direction of the heater is conveyed. The decreased conveyance span is smaller than the increased conveyance span. The second temperature sensor is disposed within the increased conveyance span and disposed opposite the first temperature sensor via a center of the increased conveyance span in the longitudinal direction of the heater.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 9, 2022
    Inventors: Takuya SESHITA, Yuusuke FURUICHI
  • Patent number: 11314192
    Abstract: An electrical connector includes a power feeding portion and a powered portion that contacts the power feeding portion. At least one of the power feeding portion and the powered portion includes a surface layer, a primary coat layer, and an exposed portion. The surface layer is made of a first conductive metal and includes a contact portion where the power feeding portion contacts the powered portion. The primary coat layer mounts the surface layer and is made of a second conductive metal. The exposed portion is separated from the contact portion and exposed to an atmosphere.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: April 26, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Daisuke Inoue, Yuusuke Furuichi
  • Publication number: 20220091558
    Abstract: An image forming apparatus includes a heating device including a heater, a developing device, and an airflow generation device. The heater includes a base, a heat generator, an electrode portion, and conductive portions. The conductive portions are disposed on one side and another side in a longitudinal direction in a heat generation region and spaced apart in a lateral direction intersecting the longitudinal direction. A maximum total value among total values of squares of current flowing in the conductive portions at longitudinal positions on the one side is larger than that on said another side. The developing device includes a rotating member and sliding portions. A sliding portion having highest temperature in operation is disposed on one side of the developing device being same as the one side of the heater in the longitudinal direction. The airflow generation device generates an airflow toward the one side of the developing device.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 24, 2022
    Inventors: Kei SAITO, Tomoya ADACHI, Yuusuke FURUICHI
  • Patent number: 11269274
    Abstract: A heating device includes an endless belt that rotates and a pressure rotator that rotates in a rotation direction. The pressure rotator contacts an outer circumferential surface of the endless belt to form a nip therebetween, through which a heating target having a particular width in an axial direction of the pressure rotator is conveyed. A heater includes a heat generator that defines a conveyance span in the axial direction of the pressure rotator, where the heating target is conveyed, and a non-conveyance span in the axial direction of the pressure rotator, where the heating target is not conveyed. A non-conveyance span temperature detector is disposed opposite the pressure rotator in the non-conveyance span of the heat generator. The non-conveyance span temperature detector detects a temperature of the pressure rotator.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: March 8, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuusuke Furuichi, Takayuki Seki, Tomoya Adachi
  • Publication number: 20220043391
    Abstract: An image forming apparatus includes a cooler and a heater. The heater includes a heat generation unit, which includes resistive heat generators arranged in a longitudinal direction of the heater, a first electrode, a second electrode, a first conductor that connects the resistive heat generators in parallel with each other to the first electrode, and a second conductor that connects the resistive heat generators in parallel with each other to the second electrode. The first and second conductors are connected to at least one of the resistive heat generators on a first longitudinal end side of the heater from a center of the resistive heat generator in the longitudinal direction of the heater. A cooling ability of the cooler to a second longitudinal end side of the heater opposite the first longitudinal end side of the heater is greater than that to the first longitudinal end side of the heater.
    Type: Application
    Filed: October 8, 2021
    Publication date: February 10, 2022
    Applicant: Ricoh Company, Ltd.
    Inventor: Yuusuke FURUICHI
  • Patent number: 11237503
    Abstract: A heater includes an electrode, a heat generator, and a plurality of layers including a first layer and at least one additional layer disposed in an opposite side with respect to a surface on which the electrode is disposed. The at least one additional layer includes at least one of a plurality of portions, a gap at a location corresponding to the electrode, existing between the plurality of portions and a single portion, at least a part of the single portion corresponding to the electrode, being relatively thinner than a part of the single portion corresponding to the heat generator.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: February 1, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuusuke Furuichi, Tomoya Adachi, Yukimichi Someya
  • Publication number: 20210389713
    Abstract: An image forming apparatus includes an image bearer, a protectant applicator, a heating device, and a protectant biasing member. The protectant applicator applies protectant to the image bearer. The heating device includes a heater including a base, a heat generator, an electrode, and a conductor coupling the heat generator to the electrode. The heater has a first position and a second position having a higher temperature than the first position. These are symmetrical to each other with respect to a longitudinal center of a heat generation area of the heater. The protectant biasing member biases the protectant to the protectant applicator with a first biasing force at a position closer to the first position than to the second position and with a second biasing force larger than the first biasing force at a position closer to the second position than to the first, and the protectant contacts the protectant applicator.
    Type: Application
    Filed: June 2, 2021
    Publication date: December 16, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenji YABE, Yuusuke FURUICHI, Tomoya ADACHI
  • Publication number: 20210364958
    Abstract: A heating device includes a heater and a feeding member. The heater includes a base and an electrode mounted on an electrode mounting face of the base. The feeding member includes a connector terminal and a restrictor. The connector terminal contacts the electrode. The restrictor engages the heater and restricts displacement of the feeding member relative to the heater.
    Type: Application
    Filed: April 27, 2021
    Publication date: November 25, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Yukimichi SOMEYA, Tomoya ADACHI, Yuusuke FURUICHI
  • Patent number: 11163264
    Abstract: An image forming apparatus includes a cooler and a heater. The heater includes a heat generation unit, which includes resistive heat generators arranged in a longitudinal direction of the heater, a first electrode, a second electrode, a first conductor that connects the resistive heat generators in parallel with each other to the first electrode, and a second conductor that connects the resistive heat generators in parallel with each other to the second electrode. The first and second conductors are connected to at least one of the resistive heat generators on a first longitudinal end side of the heater from a center of the resistive heat generator in the longitudinal direction of the heater. A cooling ability of the cooler to a second longitudinal end side of the heater opposite the first longitudinal end side of the heater is greater than that to the first longitudinal end side of the heater.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: November 2, 2021
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuusuke Furuichi
  • Publication number: 20210318655
    Abstract: An electrical connector includes a power feeding portion and a powered portion that contacts the power feeding portion. At least one of the power feeding portion and the powered portion includes a surface layer, a primary coat layer, and an exposed portion. The surface layer is made of a first conductive metal and includes a contact portion where the power feeding portion contacts the powered portion. The primary coat layer mounts the surface layer and is made of a second conductive metal. The exposed portion is separated from the contact portion and exposed to an atmosphere.
    Type: Application
    Filed: March 10, 2021
    Publication date: October 14, 2021
    Applicant: Ricoh Company Ltd.
    Inventors: Daisuke INOUE, Yuusuke FURUICHI