Patents by Inventor Ryuji Yoshida

Ryuji Yoshida 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: 9026007
    Abstract: An image forming apparatus comprising: a plurality of housing units that houses toners of mutually different colors, at least one toner inside of the plurality of housing units being to be used for forming a toner image on a recording medium; and a fixing unit configured to fix the toner image on the recording medium to the recording medium, wherein a housing unit among the plurality of housing units that houses a toner with a lowest peak temperature of loss elastic modulus is disposed in a portion with a lower temperature than a temperature of a portion where another housing unit is disposed, or in a position farther from the fixing unit than a portion where another housing unit is disposed.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: May 5, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Takashi Bisaiji, Hiroomi Tamura, Hirokatsu Suzuki, Satoru Ishikake, Ryuji Yoshida
  • Publication number: 20150117884
    Abstract: An image forming apparatus includes a latent image bearing member, a charging unit, a charging power source, a latent image writing unit, a development unit, a transfer unit, a toner detector, and a controller. The controller causes a background fog pattern to be formed on a surface of the latent image bearing member. In addition to the background fog pattern, the controller causes a latent image to be developed to form a toner image used for position identification on the surface of the latent image bearing member. The controller identifies a time when the toner image used for position identification has entered a detection range of the toner detector based on a change in outputs of the toner detector to determine a time when each of sections of the background fog pattern enters the detection range based on the identified time.
    Type: Application
    Filed: October 31, 2014
    Publication date: April 30, 2015
    Inventors: Hiroyuki SUGIYAMA, Takamasa OZEKI, Tomoko TAKAHASHI, Yoshinori NAKAGAWA, Masahiko SHAKUTO, Ryuji YOSHIDA, Taichi URAYAMA, Ryusuke MASE, Shotaro HOSHI
  • Patent number: 9010753
    Abstract: A sheet processing apparatus including a stacking tray that stacks sheets, a conveying member that conveys a sheet to the stacking tray and discharges the sheet bundle from the stacking tray, wherein the conveying member includes a conveying roller and a conveying belt stretched by a plurality of stretch rollers, and a sheet processor that performs predetermined processing to the sheet bundle. When the conveying member conveys the sheet to the stacking tray, a part of the conveying belt that is not wound on the stretch roller contacts the conveying roller by moving the conveying belt as such a nip for conveying the sheet is formed. When the conveying member discharges the sheet bundle from the stacking tray, a part of the conveying belt that is wound on the stretch roller contacts the conveying roller by moving the conveying belt so that a nip for conveying the sheet is formed.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: April 21, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuusuke Shibasaki, Nobuyoshi Suzuki, Shingo Matsushita, Katsuhiro Kosuge, Ryuji Yoshida, Wataru Takahashi, Takashi Saito, Akihiro Musha, Takuya Morinaga, Ikuhisa Okamoto
  • Publication number: 20150099053
    Abstract: The object of the present invention is to produce a masticable food, composed of an oil-in-water-type emulsion gel which has a shape-retaining property and an oil-holding property before mastication and from which oil and fat oozes during mastication to make swallowing smooth, by using any oil and fat. An oil-in-water-type emulsion gel food containing oil droplets having a particle diameter of 50-800 ?m is used. Preferably, the oil and fat is vegetable oil or fish oil, the food is a heat-sterilized food, and the gel is a soybean protein gel crosslinked by a protein corsslinking enzyme.
    Type: Application
    Filed: April 30, 2013
    Publication date: April 9, 2015
    Inventors: Hirofumi Kugitani, Takayasu Motoyama, Chiaki Miyazaki, Ryuji Yoshida, Shin Nakatani, Masahiko Samoto
  • Publication number: 20150093214
    Abstract: A paper binding device comprises: a pair of binding members that has a pair of teeth portions, and presses to bind a bundle of paper sheets; a moving unit that causes one of the pair of binding members to move along with the other of the pair of binding members between a binding position at which the bundle of paper sheets is bound and a retracted position; a separating unit that moves coordinating with movement of the one of the pair of binding members, and when the one of the pair of binding members moves from the binding position to the retracted position, that contacts with the bundle of the paper sheets and causes the bundle of paper sheets to separate from the one of the pair of binding members; and a restricting member that stops the separating unit at a restricting position between the binding position and the retracted position, when the one of the pair of the binding members moves from the binding position to the retracted position.
    Type: Application
    Filed: September 4, 2014
    Publication date: April 2, 2015
    Applicant: Ricoh Company, Limited
    Inventors: Wataru TAKAHASHI, Nobuyoshi SUZUKI, Katsuhiro KOSUGE, Hidehiko FUJIWARA, Makoto HIDAKA, Yuusuke SHIBASAKI, Takuya MORINAGA, Ryuji YOSHIDA
  • Publication number: 20150091246
    Abstract: A sheet processing apparatus includes: a loading tray on which a sheet is loaded; a pair of ejection rollers that eject the sheet to the loading tray and in which a pair or roller members are configured to be able to contact with and separate from each other; a pair of shift rollers that is provided upstream of the pair of ejection rollers in a sheet conveyance direction, are movable in a sheet width direction that is a direction perpendicular to the sheet conveyance direction, convey the sheet towards the loading tray, and performs a shift operation of shifting the sheet to a different position in the sheet width direction; and a control unit that performs control to change, based on sheet information, a shift operation timing of the sheet by the pair of shift rollers and a contacting and separating timing of the pair of ejection rollers.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 2, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Ryuji Yoshida, Nobuyoshi Suzuki, Yuusuke Shibasaki, Katsuhiro Kosuge, Hidehiko Fujiwara, Makoto Hidaka, Wataru Takahashi, Takuya Morinaga
  • Publication number: 20150076759
    Abstract: A sheet binding device includes: a pair of crimping members each including alternately-arranged multiple recesses and multiple protrusions to bind a sheaf of sheets by fitting the recesses and the protrusions with the sheet sheaf interposed therebetween. When the recesses and the protrusions of the pair of crimping members are fitted, slanted side faces of the protrusions of one of the pair of crimping members and that of the other one of the pair of crimping members are in contact with each other with a clearance left both between top portions of the protrusions of the one of the crimping members and bottom portions of the recesses of the other one of the crimping members and between top portions of the protrusions of the other one of the crimping members and bottom portions of the recesses of the one of the crimping members.
    Type: Application
    Filed: August 25, 2014
    Publication date: March 19, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Katsuhiro Kosuge, Nobuyoshi Suzuki, Shingo Matsushita, Wataru Takahashi, Yuusuke Shibasaki, Ryuji Yoshida, Takashi Saito, Akihiro Musha, Takuya Morinaga, Ikuhisa Okamoto
  • Publication number: 20150028540
    Abstract: A sheet processing apparatus including a stacking tray that stacks sheets, a conveying member that conveys a sheet to the stacking tray and discharges the sheet bundle from the stacking tray, wherein the conveying member includes a conveying roller and a conveying belt stretched by a plurality of stretch rollers, and a sheet processor that performs predetermined processing to the sheet bundle. When the conveying member conveys the sheet to the stacking tray, a part of the conveying belt that is not wound on the stretch roller contacts the conveying roller by moving the conveying belt as such a nip for conveying the sheet is formed. When the conveying member discharges the sheet bundle from the stacking tray, a part of the conveying belt that is wound on the stretch roller contacts the conveying roller by moving the conveying belt so that a nip for conveying the sheet is formed.
    Type: Application
    Filed: May 15, 2014
    Publication date: January 29, 2015
    Inventors: Yuusuke SHIBASAKI, Nobuyoshi Suzuki, Shingo Matsushita, Katsuhiro Kosuge, Ryuji Yoshida, Wataru Takahashi, Takashi Saito, Akihiro Musha, Takuya Morinaga, Ikuhisa Okamoto
  • Publication number: 20150030414
    Abstract: The present invention is concerning a method for attaching a pair of crimping members in a sheet binding device that binds a sheet bundle by engagement of the pair of crimping members, wherein at least one of the crimping members is attached to a member to which the one of the crimping members is to be attached in a state where the pair of crimping members is in engagement.
    Type: Application
    Filed: July 15, 2014
    Publication date: January 29, 2015
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Wataru TAKAHASHI, Nobuyoshi SUZUKI, Shingo MATSUSHITA, Katsuhiro KOSUGE, Yuusuke SHIBASAKI, Ryuji YOSHIDA, Takashi SAITO, Akihiro MUSHA, Takuya MORINAGA, Ikuhisa OKAMOTO
  • Patent number: 8927461
    Abstract: Provided is a substrate for superconductive film formation, which includes a metal substrate, and an oxide layer formed directly on the metal substrate, containing chromium oxide as a major component and having a thickness of 10-300 nm and an arithmetic average roughness Ra of not more than 50 nm. A method of manufacturing a substrate for superconductive film formation, which includes forming an oxide layer directly on a metal substrate, the oxide layer containing chromium oxide as a major component and having a thickness of 10-300 nm and an arithmetic average roughness Ra of not more than 50 nm.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: January 6, 2015
    Assignees: International Superconductivity Technology Center, Furukawa Electric Co., Ltd., Japan Fine Ceramics Center
    Inventors: Seiki Miyata, Hiroyuki Fukushima, Reiji Kuriki, Akira Ibi, Masateru Yoshizumi, Akio Kinoshita, Yutaka Yamada, Yuh Shiohara, Ryuji Yoshida, Takeharu Kato, Tsukasa Hirayama
  • Publication number: 20150003938
    Abstract: A sheet processing apparatus includes: a sheet fastening unit of a pressing fastener method in which a bundle of sheets is fastened by using a pair of pressing fastener members; a conveying unit that conveys the bundle of sheets that are fastened by the sheet fastening unit; a separating unit that, after the sheet fastening unit performs a fastening operation on the bundle of sheets, moves both one and the other pressing fastener members, between which the bundle of sheets is interposed, so as to separate a sheet that adheres to the pressing fastener member; and a control unit that, after the separating unit finishes an operation to separate the sheet, controls the conveying unit so as to convey the bundle of sheets that are fastened by the sheet fastening unit.
    Type: Application
    Filed: June 12, 2014
    Publication date: January 1, 2015
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Takuya MORINAGA, Nobuyoshi SUZUKI, Katsuhiro KOSUGE, Yuusuke SHIBASAKI, Ryuji YOSHIDA, Wataru TAKAHASHI, Takashi SAITO, Akihiro MUSHA, Ikuhisa OKAMOTO, Shingo MATSUSHITA
  • Patent number: 8909112
    Abstract: An image forming apparatus including a conveyance unit to convey a transfer medium, a first image forming unit to form a monochrome image transferred at a first transfer position onto the transfer medium, and a second image forming unit disposed downstream from the first image forming unit in a direction of conveyance of the transfer medium, including an intermediate transfer body to form a multi-colored toner image on the intermediate transfer body. The multi-colored toner image is transferred onto the transfer medium at a second transfer position. The conveyance unit is separated from the intermediate transfer body at the second transfer position in a monochrome mode to form the monochrome image using only the first image forming unit, and contacts the intermediate transfer body at the second transfer position in a full-color mode to form a full-color image using both the first and second image forming units.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: December 9, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Tomoko Takahashi, Naoyuki Ozaki, Ryuji Yoshida, Nobuyuki Koinuma, Hiroaki Maeda, Shunichi Hashimoto, Mugijirou Uno, Yoshinori Nakagawa, Mikio Ishibashi, Hideki Zemba
  • Publication number: 20140348521
    Abstract: An image forming apparatus includes a latent image carrier, a charging device, a latent image forming device, a developing device, a transfer device, a toner amount detector, and a control circuit to execute an imaging condition determination process. The control circuit obtains a linear approximation formula of a developing potential and an amount of toner according to an exposure potential of the patch pattern and a detected amount of toner to calculate a developing gamma and a developing start voltage according to a gradient of the linear approximation formula, determines target charging potential, exposure potential and developing bias according to the developing gamma and the developing start voltage, determines an amount of a background potential to be corrected according to a difference between the developing start voltage and a target developing start voltage obtained according to environmental information, and corrects the target charging potential.
    Type: Application
    Filed: May 12, 2014
    Publication date: November 27, 2014
    Inventors: Ryusuke MASE, Taichi URAYAMA, Tomoko TAKAHASHI, Shotaro HOSHI, Ryuji YOSHIDA, Hiroyuki SUGIYAMA, Masahiko SHAKUTO, Hideki ZEMBA, Takamasa OZEKI, Yoshinori NAKAGAWA
  • Publication number: 20140341597
    Abstract: An image forming apparatus includes a latent image carrier to carry a latent image on a surface thereof, a developing device to develop the latent image with toner to form a toner image on the surface of the latent image carrier, a transfer unit to transfer the toner image onto a recording medium, and a controller. The controller executes an image density adjustment control of adjusting a developing bias to obtain a target image density. The controller further executes a forced toner consumption control of forcibly consuming the toner contained in the developing device by attaching the toner to the latent image carrier to form a toner pattern on the surface of the latent image carrier. The controller executes the forced toner consumption control to forcibly consume a smaller amount of toner in response to a higher developing bias as adjusted by the image density adjustment control.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 20, 2014
    Inventors: Taichi URAYAMA, Ryuji Yoshida, Tomoko Takahashi, Shotaro Hoshi, Hiroyuki Sugiyama, Ryusuke Mase, Masahiko Shakuto, Takamasa Ozeki, Hideki Zemba, Yoshinori Nakagawa
  • Publication number: 20140301747
    Abstract: A development device is operable in multiple different speed modes and includes a developer bearer to carry developer, a developer regulator to adjust an amount of developer carried on the developer bearer, and multiple developer conveyance members disposed facing the developer bearer to transport developer in a longitudinal direction to circulate developer inside the development device. The multiple developer conveyance members including a first developer conveyance member to supply developer to the developer bearer and a second developer conveyance member to transport developer collected from the developer bearer. The development device executes developer amount balance adjustment in which a driving velocity of at least the multiple developer conveyance members is increased from a driving velocity in a lower-speed mode for a predetermined period after image development in the lower speed mode is completed and before image development in a higher speed mode is started.
    Type: Application
    Filed: April 4, 2013
    Publication date: October 9, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomoko TAKAHASHI, Yoshiyuki FUKUDA, Yoshio HATTORI, Sho AKIYAMA, Takamasa OZEKI, Yoshinori NAKAGAWA, Mikio ISHIBASHI, Ryuji YOSHIDA, Taichi URAYAMA
  • Patent number: 8840103
    Abstract: A sheet conveying device includes: a separation sheet feeding mechanism having a paper feeding belt and a separation roller; and an adjustment mechanism that changes contact state of the paper feeding belt to the separation roller by changing relative position of the paper feeding belt and the separation roller, and changes and adjusts separation performance of the separation roller for the subsequent sheet, wherein the adjustment mechanism includes a cam follower member changing the relative position of the feeding belt and the separation roller, the cam member includes a first cam face and a second cam face which are formed at each rotation radius position in accordance with the rotation angle position, and are spaced apart in the rotation radius direction, and the cam follower member has a contact unit guided by the first cam face and the second cam face.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: September 23, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Takashi Fukumoto, Mamoru Kambayashi, Michitaka Suzuki, Atsushi Fujita, Masataka Fukuchi, Ryuji Yoshida, Hideki Tobinaga, Norio Kimura, Kenichiro Morita, Koki Sakano, Takuya Sano, Takuya Morinaga, Takashi Nakano
  • Publication number: 20140255050
    Abstract: An image forming apparatus includes a charging bias output device, a developing bias output device, a transfer bias output device, and a controller. The controller controls the transfer bias output device to supply a transfer bias from a time at which a first position of a photosensitive member arrives at a transfer position after the charging bias output device starts supplying a charging bias. An initial value of the transfer bias is controlled to be smaller than a normal set value for a predetermined time period (Tc) which is a time after the transfer bias starts to be supplied and within a time corresponding to a rise time (Ta) during which a surface potential of the photosensitive member reaches a predetermined potential after the charging bias starts to be output. The first position of the photosensitive member is a position at which the charging device start charging the photosensitive member.
    Type: Application
    Filed: February 5, 2014
    Publication date: September 11, 2014
    Inventors: Ryuji YOSHIDA, Hideki Zemba, Yusuke Mitani, Shotaro Hoshi, Masahiko Shakuto, Hiroaki Maeda
  • Patent number: 8818255
    Abstract: An image forming apparatus including a fixing liquid applicator to apply a fixing liquid to a recording medium, a transfer device to transfer a toner image from a toner image bearing member onto the recording medium to which the fixing liquid is applied while the toner image is in contact with the fixing liquid, and a fixing device to fix the toner image on the recording medium by heating the toner image and the fixing liquid. The fixing liquid comprises a plasticizer having a function to swell and soften a toner.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: August 26, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryuji Yoshida, Nobuyuki Koinuma, Tomoko Takahashi, Mugijirou Uno, Mikio Ishibashi, Hideki Zemba, Yoshinori Nakagawa, Shunichi Hashimoto, Naoyuki Ozaki, Hideaki Kanaya
  • Publication number: 20140219747
    Abstract: A sheet binding device binds a sheet bundle by causing a movable-crimping-member moving unit to move a movable crimping member thereby holding a sheet bundle between crimping members. The movable-crimping-member moving unit includes: a link mechanism that includes a first link member rotatably connected to the movable crimping member, a second link member rotatably connected to a fixed member fixed to a device body and connected to the first link member through a connecting part; a connecting member rotatably connected to the connecting part, and capable of moving between a first position causing the link mechanism to be extended and a second position causing the link mechanism to be more flexed than in the first position; and a connecting-member moving unit that includes a rotary member capable of rotating on a displaceable rotating shaft, and reciprocates the connecting member by rotation of the rotary member in one direction.
    Type: Application
    Filed: January 23, 2014
    Publication date: August 7, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Wataru TAKAHASHI, Nobuyoshi SUZUKI, Yuusuke SHIBASAKI, Ryuji YOSHIDA, Takashi SAITO, Akihiro MUSHA, Katsuhiro KOSUGE, Shingo MATSUSHITA, Takuya MORINAGA, Ikuhisa OKAMOTO
  • Patent number: 8774694
    Abstract: An image forming apparatus includes a fixing liquid applicator to apply a fixing liquid to a recording medium before a toner image is transferred on the recording medium, a transfer device to transfer a toner image from a toner image bearing member onto the recording medium applied with the fixing liquid, and a fixing device to fix the toner image on the recording medium by heating. The fixing liquid applicator includes an application member disposed opposing a face of the recording medium on which the toner image is transferred to apply to the recording medium the fixing liquid borne on a surface of the application member, a supply unit to supply the fixing liquid to the application member, and a sealing device to form along with the application member a sealed space in which the supply unit and the fixing liquid to be supplied to the application member are sealed.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: July 8, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryuji Yoshida, Nobuyuki Koinuma, Tomoko Takahashi, Hideaki Kanaya, Shunichi Hashimoto, Naoyuki Ozaki, Yoshinori Nakagawa, Mugijirou Uno, Hideki Zemba, Mikio Ishibashi