Patents by Inventor Shohei Saito

Shohei Saito 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: 10459361
    Abstract: An image forming apparatus includes a voltage adjustment portion having a voltage adjustment member connected to a contact member contacting an endless belt, the voltage adjustment portion changing a current flowing from a current supply member contacting the belt at a position different from a position, at which an image bearing member contacts the belt with respect to a rotating direction of the belt, to the voltage adjustment member via the belt according to a control signal input from a control portion outputting a control signal, thereby changing a size of a transfer potential to transfer a toner image borne by the image bearing member onto the belt at a part at which the belt contacts the image bearing member.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: October 29, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiji Saito, Keisuke Ishizumi, Toshihiko Takayama, Masaru Ohno, Shingo Ito, Shohei Ishio, Keisuke Samejima, Keizo Kojima, Ryo Matsumura
  • Patent number: 10442886
    Abstract: Provided is a mechanochromic resin by which a stress applied to a material can be visualized in real time, and a mechanochromic luminescent material that is used in the synthesis of the mechanochromic resin. Stress can be visualized in real time by means of a mechanochromic luminescent material represented by formula (1) or formula (2) and a mechanochromic resin obtained by crosslinking the mechanochromic luminescent material. [Chemical formula 1] (In the formula, Y1 and Y2 each denote a substituent group that inhibits aggregation of the mechanochromic luminescent material represented by formula (1), and Y1 and Y2 may be same as or different from each other. Z1 and Z2 each denote a polymerizable group, and may be same as or different from each other.) [Chemical formula 2] (In the formula, Y1 and Y2 each denote a substituent group that inhibits aggregation of the mechanochromic luminescent material represented by formula (2), and Y1 and Y2 may be same as or different from each other.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: October 15, 2019
    Assignee: Japan Science and Technology Agency
    Inventors: Hiroshi Yabu, Yuta Saito, Shohei Saito, Shigehiro Yamaguchi, Shunpei Nobusue
  • Patent number: 10401554
    Abstract: A light-guiding device used in a display device includes a plurality of first half mirrors between a first light-guiding body and a second light-guiding body. Each of the first half mirrors is formed on a first surface extending along a first direction of the first surface and a second surface extending along a second direction in the first light-guiding body. The first light-guiding body includes a third surface overlapping the second surface in a direction along a third direction in which two first surfaces located on both sides of the second surface do not overlap each other between the first surface and the second surface. The third surface extends in a direction different from the first direction.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: September 3, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Shohei Yoshida, Atsushi Saito, Hiroyuki Tatsugi, Masatoshi Yonekubo
  • Publication number: 20190031820
    Abstract: Provided is a mechanochromic resin by which a stress applied to a material can be visualized in real time, and a mechanochromic luminescent material that is used in the synthesis of the mechanochromic resin. Stress can be visualized in real time by means of a mechanochromic luminescent material represented by formula (1) or formula (2) and a mechanochromic resin obtained by crosslinking the mechanochromic luminescent material. [Chemical formula 1] (In the formula, Y1 and Y2 each denote a substituent group that inhibits aggregation of the mechanochromic luminescent material represented by formula (1), and Y1 and Y2 may be same as or different from each other. Z1 and Z2 each denote a polymerizable group, and may be same as or different from each other.) [Chemical formula 2] (In the formula, Y1 and Y2 each denote a substituent group that inhibits aggregation of the mechanochromic luminescent material represented by formula (2), and Y1 and Y2 may be same as or different from each other.
    Type: Application
    Filed: November 16, 2015
    Publication date: January 31, 2019
    Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Hiroshi YABU, Yuta SAITO, Shohei SAITO, Shigehiro YAMAGUCHI, Shunpei NOBUSUE
  • Patent number: 9650219
    Abstract: A paper conveying device includes a conveying guide, a bearing, a conveying-guide facing surface, and a separation restrictor. The conveying guide includes a conveyance surface for conveying paper and a pivot shaft and is swingable about the pivot shaft. The bearing includes a support surface facing at least an upper semiperimeter of the pivot shaft. The conveying-guide facing surface is provided to face an end of the conveying guide when the conveying guide swings. The end is opposite to the conveyance surface. The separation restrictor is provided to the conveying guide to restrict separation of the pivot shaft from the bearing at least in a given swing range of the conveying guide by contacting the conveying-guide facing surface.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 16, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Arinobu Yoshiura, Hideo Nagafuji, Yuji Arai, Kohichi Utsunomiya, Kiho Sai, Shohei Saito, Yutaka Ikebuchi, Motoyoshi Yamano
  • Patent number: 9599940
    Abstract: A fixing device includes: a fixing member that is rotatable and in an endless shape; a heat source that heats the fixing member; a nip forming member that is arranged inside the fixing member; and a pressurizing member that is pressurized to be in contact with the nip forming member through the fixing member, to form a fixing nip. The fixing device fixes an unfixed image on a recording medium by passing the recording medium that carries the unfixed image through the fixing nip. The nip forming member includes a base layer, and a high thermal-conductive layer that is arranged on a surface layer of the base layer on a fixing nip side, and that has higher thermal conductivity than the base layer, and in the high thermal-conductive layer, a low thermal-conductive portion is arranged near an end portion in an axial direction of the fixing member.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: March 21, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Motoyoshi Yamano, Kohichi Utsunomiya, Hiromasa Takagi, Kenji Ishii, Takayuki Seki, Keitaro Shoji, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Shohei Saito, Qifeng Cui, Yutaka Ikebuchi
  • Patent number: 9533496
    Abstract: An apparatus for ejecting liquids includes a liquid ejection head including a nozzle, the nozzle ejecting the liquids; and an ejection detector to detect whether the liquids are ejected from the nozzle of the liquid ejection head, the ejection detector including an insulated receiver having an adhering face to receive and adhere the liquids ejected from the nozzle and an electrode disposed on an opposite side of the adhering face of the receiver. The ejection detector detects electrical change generated when the liquids adhere to the adhering face of the receiver while generating a potential difference between the liquid ejection head and the electrode.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 3, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shotaro Takeuchi, Shohei Saito, Takahiro Kikuchi
  • Patent number: 9494900
    Abstract: A device includes a fixing belt, a holder that holds the fixing belt, a pressing member that comes in contact with the fixing belt, a nip-forming-member arranged inside the fixing belt, that forms a nip by coming in contact with the pressing member, a supporting member that supports the nip-forming-member, a side plate to which the nip-forming-member and the supporting member are fixed, and a pressing mechanism that presses a pressing roller to the nip-forming-member via the fixing belt. The supporting member includes at least two plates. The two plates are separated from each other near a contact portion where the plates come in contact with the nip-forming-member. At least a part of each of the plates is a flat surface parallel to a direction of a load applied by the pressing mechanism. Portions of the two plates on a side distant from the contact portion are joined together.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: November 15, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kohichi Utsunomiya, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Qifeng Cui, Shohei Saito, Yutaka Ikebuchi, Motoyoshi Yamano
  • Patent number: 9477182
    Abstract: A fixing device includes: a fixing member; an opposing member that provides a fixing nip with the fixing member; a heating unit that heats the fixing member; a heating area changing member that moves to change a heating area of the fixing member heated by the heating unit; and a position detection sensor that detects a position of the heating area changing member. The fixing device controls a stop position of the heating area changing member based on detection by the position detection sensor. The single position detection sensor detects the position of the heating area changing member both when the heating area changing member is moving from a preset reference position to an arbitrary position and when the heating area changing member is moving back from an arbitrary position to the reference position.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: October 25, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yutaka Ikebuchi, Hideo Nagafuji, Yuji Arai, Kohichi Utsunomiya, Arinobu Yoshiura, Kiho Sai, Motoyoshi Yamano, Shohei Saito
  • Publication number: 20160257113
    Abstract: An apparatus for ejecting liquids includes a liquid ejection head including a nozzle, the nozzle ejecting the liquids; and an ejection detector to detect whether the liquids are ejected from the nozzle of the liquid ejection head, the ejection detector including an insulated receiver having an adhering face to receive and adhere the liquids ejected from the nozzle and an electrode disposed on an opposite side of the adhering face of the receiver. The ejection detector detects electrical change generated when the liquids adhere to the adhering face of the receiver while generating a potential difference between the liquid ejection head and the electrode.
    Type: Application
    Filed: February 18, 2016
    Publication date: September 8, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Shotaro Takeuchi, Shohei SAITO, Takahiro KIKUCHI
  • Patent number: 9429888
    Abstract: A fixing device includes an endless fixing belt: a fixing belt holding member; a pressure member that makes a contact with the circumference of the fixing belt; a nip forming member that is disposed inside the fixing belt and forms a nip between the nip forming member and the pressure member; a nip supporting member that is made of a sheet metal; a side plate that supports the fixing belt holding member and the nip supporting member; and a pressure mechanism that presses the pressure member against the nip forming member with the fixing belt between the pressure member and the nip forming member. Both end surfaces of the nip supporting member are shear surfaces and one of the shear surfaces makes a contact with the nip forming member and the other shear surface is supported by the side plate.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: August 30, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kohichi Utsunomiya, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Kiho Sai, Shohei Saito, Yutaka Ikebuchi, Motoyoshi Yamano
  • Publication number: 20160221775
    Abstract: A paper conveying device includes a conveying guide, a bearing, a conveying-guide facing surface, and a separation restrictor. The conveying guide includes a conveyance surface for conveying paper and a pivot shaft and is swingable about the pivot shaft. The bearing includes a support surface facing at least an upper semiperimeter of the pivot shaft. The conveying-guide facing surface is provided to face an end of the conveying guide when the conveying guide swings. The end is opposite to the conveyance surface. The separation restrictor is provided to the conveying guide to restrict separation of the pivot shaft from the bearing at least in a given swing range of the conveying guide by contacting the conveying-guide facing surface.
    Type: Application
    Filed: February 2, 2016
    Publication date: August 4, 2016
    Inventors: Arinobu YOSHIURA, Hideo NAGAFUJI, Yuji ARAI, Kohichi UTSUNOMIYA, Kiho SAI, Shohei SAITO, Yutaka IKEBUCHI, Motoyoshi YAMANO
  • Patent number: 9400482
    Abstract: A paper conveyance device comprises: a conveyance member having a conveyance surface for conveying a recording medium, the conveyance member extending in a first direction along a front-rear direction of the image forming apparatus that has an opening member for exposing inside of the apparatus, and including a handle disposed on an exposure surface of the opening member, and a swing pivot point that is used to swing the conveyance member around the first direction to expose the conveyance surface when the handle is operated in the open state. The handle is disposed in at least one position in a range between positions near a center of the conveyance member in the first direction. The positions are a certain distance away from the center of the conveyance member along the first direction.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: July 26, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Shohei Saito, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Kohichi Utsunomiya, Qifeng Cui, Motoyoshi Yamano, Yutaka Ikebuchi, Yuichi Harashima, Yohichi Tsukamoto, Satoshi Endoh, Daisuke Sawada, Yuuki Nobuoka, Shingo Kuboki, Takahiro Kikuchi
  • Patent number: 9400464
    Abstract: A fixing device includes an endless fixing belt, fixing-belt holding members which hold the fixing belt at opposite ends, a pressure member to be brought into contact with the fixing belt, a nip forming member arranged inside the fixing belt to form a nip area by contacting the pressure member with the fixing belt, a nip supporting member, side plates where the fixing-belt holding members and the nip supporting member are fixed, and a pressing mechanism which presses the pressure member against the nip forming member. The nip forming member includes at least three layers including a heat absorbing layer contacting the nip supporting member. With no load applied, the nip supporting member assumes a shape protruding at longitudinal center toward the pressure member and is in contact with the nip forming member while having the shape protruding at the center portion.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: July 26, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kohichi Utsunomiya, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Shohei Saito, Qifeng Cui, Yutaka Ikebuchi, Motoyoshi Yamano
  • Patent number: 9354572
    Abstract: A fixing device includes: a rotatable endless belt type fixing member; a pressurizing member that is opposed to the fixing member and rotates; and a nip forming member that is arranged inside the fixing member, and forms a nip part by contact with the pressurizing member through the fixing member. The nip forming member includes: a heat-uniformizing member having bent portions opposed to each other; a heat-insulating member arranged inside the heat-uniformizing member; a heat-absorbing member arranged on an upper surface of the heat-insulating member; and a sliding sheet that covers a nip side of the heat-uniformizing member, and is held between the bent portions of the heat-uniformizing member and the heat-insulating member. The heat-uniformizing member and the heat-insulating member are fastened to each other by fitting a fitting part formed on the heat-uniformizing member to a fitted part formed on the heat-insulating member.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: May 31, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Arinobu Yoshiura, Hideo Nagafuji, Yuji Arai, Yutaka Ikebuchi, Kohichi Utsunomiya, Motoyoshi Yamano, Kiho Sai, Shohei Saito
  • Patent number: 9298146
    Abstract: A fixing device includes: a rotatable fixing member formed as an endless belt; a heat source to heat the fixing member; a nip-forming member being not rotatable and arranged inside the fixing member; and a pressure member arranged outside the fixing member and forming a nip between the pressure member and the fixing member. The nip-forming member is formed of a first heat transmission unit and a sliding sheet. The first heat transmission unit includes an abutting part abutting the fixing member with the sliding sheet therebetween, and a bent part or bent parts extending inside the fixing member at upstream or upstream and downstream of the nip in a transport direction of a recording medium. A retaining part to catch and retain the sliding sheet is provided at a tip of at least the bent part at upstream of the nip in the transport direction.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: March 29, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Arinobu Yoshiura, Hideo Nagafuji, Yuji Arai, Kohichi Utsunomiya, Shohei Saito, Qifeng Cui, Yutaka Ikebuchi, Motoyoshi Yamano, Kenji Ishii, Hiromasa Takagi, Keitaro Shoji
  • Publication number: 20160062286
    Abstract: A fixing device includes: a rotatable endless belt type fixing member; a pressurizing member that is opposed to the fixing member and rotates; and a nip forming member that is arranged inside the fixing member, and forms a nip part by contact with the pressurizing member through the fixing member. The nip forming member includes: a heat-uniformizing member having bent portions opposed to each other; a heat-insulating member arranged inside the heat-uniformizing member; a heat-absorbing member arranged on an upper surface of the heat-insulating member; and a sliding sheet that covers a nip side of the heat-uniformizing member, and is held between the bent portions of the heat-uniformizing member and the heat-insulating member. The heat-uniformizing member and the heat-insulating member are fastened to each other by fitting a fitting part formed on the heat-uniformizing member to a fitted part formed on the heat-insulating member.
    Type: Application
    Filed: August 26, 2015
    Publication date: March 3, 2016
    Inventors: Arinobu YOSHIURA, Hideo NAGAFUJI, Yuji ARAI, Yutaka IKEBUCHI, Kohichi UTSUNOMIYA, Motoyoshi YAMANO, Kiho SAI, Shohei SAITO
  • Publication number: 20160033906
    Abstract: A fixing device includes: a fixing member; an opposing member that provides a fixing nip with the fixing member; a heating unit that heats the fixing member; a heating area changing member that moves to change a heating area of the fixing member heated by the heating unit; and a position detection sensor that detects a position of the heating area changing member. The fixing device controls a stop position of the heating area changing member based on detection by the position detection sensor. The single position detection sensor detects the position of the heating area changing member both when the heating area changing member is moving from a preset reference position to an arbitrary position and when the heating area changing member is moving back from an arbitrary position to the reference position.
    Type: Application
    Filed: July 22, 2015
    Publication date: February 4, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yutaka Ikebuchi, Hideo Nagafuji, Yuji Arai, Kohichi Utsunomiya, Arinobu Yoshiura, Kiho Sai, Motoyoshi Yamano, Shohei Saito
  • Publication number: 20160011548
    Abstract: A device includes a fixing belt, a holder that holds the fixing belt, a pressing member that comes in contact with the fixing belt, a nip-forming-member arranged inside the fixing belt, that forms a nip by coming in contact with the pressing member, a supporting member that supports the nip-forming-member, a side plate to which the nip-forming-member and the supporting member are fixed, and a pressing mechanism that presses a pressing roller to the nip-forming-member via the fixing belt. The supporting member includes at least two plates. The two plates are separated from each other near a contact portion where the plates come in contact with the nip-forming-member. At least a part of each of the plates is a flat surface parallel to a direction of a load applied by the pressing mechanism. Portions of the two plates on a side distant from the contact portion are joined together.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 14, 2016
    Inventors: Kohichi UTSUNOMIYA, Hideo NAGAFUJI, Yuji ARAI, Arinobu YOSHIURA, Qifeng CUI, Shohei SAITO, Yutaka IKEBUCHI, Motoyoshi YAMANO
  • Publication number: 20160011550
    Abstract: A fixing device includes an endless fixing belt, fixing-belt holding members which hold the fixing belt at opposite ends, a pressure member to be brought into contact with the fixing belt, a nip forming member arranged inside the fixing belt to form a nip area by contacting the pressure member with the fixing belt, a nip supporting member, side plates where the fixing-belt holding members and the nip supporting member are fixed, and a pressing mechanism which presses the pressure member against the nip forming member. The nip forming member includes at least three layers including a heat absorbing layer contacting the nip supporting member. With no load applied, the nip supporting member assumes a shape protruding at longitudinal center toward the pressure member and is in contact with the nip forming member while having the shape protruding at the center portion.
    Type: Application
    Filed: July 8, 2015
    Publication date: January 14, 2016
    Inventors: Kohichi UTSUNOMIYA, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Shohei Saito, Qifeng Cui, Yutaka Ikebuchi, Motoyoshi Yamano