Patents by Inventor Keiichi Yoshida

Keiichi 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).

  • Publication number: 20130039678
    Abstract: A powder container (61) includes a powder containing unit (66) which has an opening portion formed at one end portion thereof, is configured to contain a powder (T) therein and, is formed of a flexible material so as to be deformable. When a delivery member (81) is pressed inward from the outside of the powder containing unit (66) so as to move toward the opening portion, the powder (T) is delivered out from the opening portion. The end portion provided with the opening portion is provided with a discharging unit (67) which is fixed to a powder conveying apparatus, and discharges the powder (T) delivered from the opening portion out to the powder conveying apparatus. In addition, an end portion opposite to the opening portion is provided with a portion to be locked which is locked to a locking portion of the powder conveying apparatus while being biased in a direction opposite toward the movement direction of the delivery member (81).
    Type: Application
    Filed: April 21, 2011
    Publication date: February 14, 2013
    Inventors: Keiichi Yoshida, Shunji Katoh, Hiroshi Ikeguchi
  • Patent number: 8326189
    Abstract: There is provided a separation member for separating a first conveying path formed by a first conveying member from a second conveying path formed by a second conveying member. There is also provided an opposed member facing a magnetic pole H4 at an upstream side of two magnetic poles H4 and H6 that forms a developer-releasing magnetic pole H5.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: December 4, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Yoshiyuki Fukuda, Katsumi Masuda, Nobuyuki Taguchi, Yuuki Satoh, Yasufumi Takahashi, Keiichi Yoshida, Yoshio Hattori, Akira Azami, Takamasa Ozeki, Toshiki Hayashi
  • Publication number: 20120219318
    Abstract: A powder container includes: a housing unit that is horizontally elongated, that contains powder, and that has at least part thereof being deformable; and a discharging unit that is attached to one end of the housing unit in a longitudinal direction. The discharging unit includes a discharge opening through which the powder in the housing unit is discharged outside and a rotary shutter that is provided inside the discharge opening and that opens and closes the discharge opening by rotating about a rotating shaft that is arranged perpendicular to the longitudinal direction of the housing unit.
    Type: Application
    Filed: February 6, 2012
    Publication date: August 30, 2012
    Inventors: Keiichi Yoshida, Shunji Katoh, Hiroshi Ikeguchi, Shinji Tamaki
  • Publication number: 20120177414
    Abstract: A powder conveying apparatus includes a powder containing unit that contains powder and at least a portion of which is deformable; a discharging unit that discharges the powder from the powder housing unit to an outside; a delivery member that moves toward the discharging unit side while pushing the deformable portion of the powder containing unit inward to thereby convey the powder to the discharging unit; and an oscillation applying unit that applies oscillation to the discharging unit. Driving of the oscillation applying unit is controlled in response to an operation of the delivery member.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 12, 2012
    Inventors: Hiroshi Ikeguchi, Shunji Katoh, Keiichi Yoshida
  • Publication number: 20120122244
    Abstract: A method of identifying compounds that inhibit fertilization is provided. The method can include selecting compounds that bind to equatorin protein. Two types of equatorin protein, a long form and a short form, can be present in the testis. The amino acid sequence of mouse equatorin from positions 101 to 146 including the 138th O-glycosylated threonine residue contains an epitope recognized by anti-equatorin antibody MN9 that has an effect of inhibiting fertilization. In addition, the MN9 antibody also binds to human sperm. Compounds that bind to the epitope can inhibit fertilization. Both forms of mouse equatorin can be used as well as human equatorin to identify compounds that inhibit fertilization.
    Type: Application
    Filed: March 31, 2010
    Publication date: May 17, 2012
    Applicant: NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Kiyotaka Toshimori, Chizuru Ito, Kenji Yamatoya, Keiichi Yoshida
  • Publication number: 20120099902
    Abstract: A powder container includes: a powder containing unit that contains powder and at least a part of which is deformable; a discharging unit that receives the powder supplied from an opening of the powder containing unit via an inlet arranged on the discharging unit and discharges the powder to a supply destination; an elastic member that is arranged on a periphery of the inlet of the discharging unit; and a seal member that is arranged on the powder containing unit and seals the opening. The seal member is sandwiched between the discharging unit and the powder containing unit via the elastic member such that the seal member is removable from between the discharging unit and the powder containing unit.
    Type: Application
    Filed: September 28, 2011
    Publication date: April 26, 2012
    Inventors: Keiichi YOSHIDA, Shunji Katoh, Hiroshi Ikeguchi
  • Patent number: 8145100
    Abstract: A process cartridge for use in an image forming apparatus includes an image bearing member and a developing unit. The developing unit includes a developer bearing member to bear developer including toner and carrier, a casing forming a developer container containing the developer, a screw having a shaft with a spiral screw blade, a toner density sensor to detect a density of the toner on a detection surface, and a detection surface agitating member fixedly mounted on the shaft of the screw at a position facing a detection surface to scrape away the developer accumulated on the detection surface as the screw rotates. The detection surface agitating member includes an elastic sheet elastically deformable to scrape away the developer accumulated on the detection surface and disposed at a substantially same angle to an axial direction of the shaft of the screw as the spiral screw blade.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: March 27, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yushi Hirayama, Shinji Kato, Takeroh Kurenuma, Keiichi Yoshida, Shin Hasegawa, Hitoshi Ishibashi, Yoshiaki Miyashita, Kohta Fujimori, Nobutaka Takeuchi, Tetsuya Muto, Akira Yoshida, Hiroyuki Uenishi
  • Patent number: 8023855
    Abstract: A development device includes a developer carrier configured to carry developer and disposed in a development case, partly exposed from an opening of the development case facing an image carrier, a developer-transporting member configured to transport the developer to the developer carrier, and a discharging member housing a discharging space including a communicating path connecting to an area where the developer carrier faces the developer-transporting member, from which air is discharged into the discharging space, and a discharging port that opens in a longitudinal direction of the developer-transporting member, from which air is discharged from the discharging space.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: September 20, 2011
    Assignee: Ricoh Company Limited
    Inventors: Yoshio Hattori, Keiichi Yoshida, Hiroyuki Uenishi
  • Publication number: 20110058858
    Abstract: There is provided a separation member for separating a first conveying path formed by a first conveying member from a second conveying path formed by a second conveying member. There is also provided an opposed member facing a magnetic pole H4 at an upstream side of two magnetic poles H4 and H6 that forms a developer-releasing magnetic pole H5.
    Type: Application
    Filed: August 20, 2010
    Publication date: March 10, 2011
    Inventors: Yoshiyuki Fukuda, Katsumi Masuda, Nobuyuki Taguchi, Yuuki Satoh, Yasufumi Takahashi, Keiichi Yoshida, Yoshio Hattori, Akira Azami, Takamasa Ozeki, Toshiki Hayashi
  • Patent number: 7840357
    Abstract: A method of evaluating a cell state based on information of an image taken of a cell containing a chromosome territory is provided. This method includes extracting the chromosome territory from the image (S20), standardizing a positioning state of the chromosome territory and then quantifying the positioning state (S22), and evaluating the cell state based on the quantified positioning state of the chromosome territory (S26).
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: November 23, 2010
    Assignee: NEC Corporation
    Inventors: Tomoharu Kiyuna, Kenji Okajima, Hiroaki Torii, Ken' ichi Kamijo, Masahiko Kuroda, Keiichi Yoshida, Kiyoshi Mukai
  • Patent number: 7826786
    Abstract: In an image forming apparatus, an area applied with a lubricant, i.e., an area of a lubricant layer having a uniform thickness, is obtained by spreading the lubricant by a lubricant smoothing blade. The area applied with a lubricant covers an area cleaned by a cleaning blade, i.e., a contact portion of the cleaning blade with a photoconductor.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: November 2, 2010
    Assignee: Ricoh Company, Limited
    Inventors: Takeo Suda, Shinichi Kawahara, Takatsugu Fujishiro, Tokuya Ojimi, Takeshi Tabuchi, Masato Yanagida, Haruji Mizuishi, Teruyuki Kasuga, Hiroomi Harada, Shuji Tanaka, Takaaki Tawada, Hiroshi Ono, Ken Amemiya, Toshio Koike, Yuji Arai, Masanori Kawasumi, Takuzi Yoneda, Masami Tomita, Yutaka Takahashi, Yoshio Hattori, Keiichi Yoshida
  • Patent number: 7599650
    Abstract: A developer bearing member on which grooves slanting in a thrust direction of the developer bearing member cross other grooves reversely slanting relative to the thrust direction, wherein each of the grooves and the reversely slanting grooves is slanting at an angle of greater than 0° and not greater than 40°. Any two adjacent intersections of the grooves and the reversely slanting grooves in the thrust (or peripheral) direction are preferably on different levels in the peripheral (or thrust) direction. The distance between two adjacent intersections in the thrust direction is preferably from 1.3 mm to 4.8 mm. The distance between two adjacent intersections in the thrust direction is preferably from 0.38 Vd/Vi (mm) to 1.1 Vd/Vi (mm). The deviation in depth of grooves present on a 36° arc surface portion of the member is not greater than 15% of the gap between the image bearing member and the developer bearing member.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: October 6, 2009
    Assignee: Ricoh Company Limited
    Inventors: Shunji Katoh, Katsumi Masuda, Hideo Yoshizawa, Yoshio Hattori, Hideki Kimura, Kiyotaka Sakai, Kenji Nakajima, Keiichi Yoshida, Akira Azami, Yuji Suzuki
  • Patent number: 7581058
    Abstract: A non-volatile storage device (1) has non-volatile memory units (FARY0 to FARY3), buffer units (BMRY0 to BMRY3) and a control unit (CNT), and the control unit can control a first access processing between an outside and the buffer unit and a second access processing between the non-volatile memory unit and the buffer unit upon receipt of directives from the outside separately from each other. The control unit can independently carry out an access control over the non-volatile memory unit and the buffer unit in accordance with the directives sent from the outside, respectively. Therefore, it is possible to set up next write data to the buffer unit simultaneously with the erase operation of the non-volatile memory unit or to output once read storage information to the buffer unit at a high speed as in a cache memory operation in accordance with the directive sent from the outside.
    Type: Grant
    Filed: December 24, 2007
    Date of Patent: August 25, 2009
    Assignees: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Yoshinori Takase, Keiichi Yoshida, Takashi Horii, Atsushi Nozoe, Takayuki Tamura, Tomoyuki Fujisawa, Ken Matsubara
  • Publication number: 20090190960
    Abstract: A process cartridge for use in an image forming apparatus includes an image bearing member and a developing unit. The developing unit includes a developer bearing member to bear developer including toner and carrier, a casing forming a developer container containing the developer, a screw having a shaft with a spiral screw blade, a toner density sensor to detect a density of the toner on a detection surface, and a detection surface agitating member fixedly mounted on the shaft of the screw at a position facing a detection surface to scrape away the developer accumulated on the detection surface as the screw rotates. The detection surface agitating member includes an elastic sheet elastically deformable to scrape away the developer accumulated on the detection surface and disposed at a substantially same angle to an axial direction of the shaft of the screw as the spiral screw blade.
    Type: Application
    Filed: January 27, 2009
    Publication date: July 30, 2009
    Inventors: Yushi Hirayama, Shinjl Kato, Takeroh Kurenuma, Keiichi Yoshida, Shin Hasegawa, Hitoshi Ishibashi, Yoshiaki Miyashita, Kohta Fujimori, Nobutaka Takeuchi, Tetsuya Muto, Akira Yoshida, Hiroyuki Uenishi
  • Publication number: 20090136257
    Abstract: A development device includes a developer carrier configured to carry developer and disposed in a development case, partly exposed from an opening of the development case facing an image carrier, a developer-transporting member configured to transport the developer to the developer carrier, and a discharging member housing a discharging space including a communicating path connecting to an area where the developer carrier faces the developer-transporting member, from which air is discharged into the discharging space, and a discharging port that opens in a longitudinal direction of the developer-transporting member, from which air is discharged from the discharging space.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 28, 2009
    Inventors: Yoshio Hattori, Keiichi Yoshida, Hiroyuki Uenishi
  • Publication number: 20090103704
    Abstract: A compact voice information processing device having excellent howling preventing effect, and a wiring system using the same device, which is excellent in function expandability and easy exchangeability, are provided. This processing device has a speaker, a first microphone disposed to face a diaphragm of the speaker, a second microphone disposed outside of an outer periphery of the diaphragm of the speaker, and a signal processing portion for removing an output voice component of the speaker mixed in an output of the second microphone by use of an output of the first microphone. This processing device is preferably used in a wiring system for transmitting information and electric power between plural locations in a building structure.
    Type: Application
    Filed: January 26, 2006
    Publication date: April 23, 2009
    Inventors: Kousaku Kitada, Keiichi Yoshida, Yoshio Mitsutake, Yasushi Arikawa, Hiroaki Takeyama, Tomohiro Ota, Hiroshi Kawada, Shinya Kimoto, Manabu Nakata, Yuya Hasegawa
  • Patent number: 7515450
    Abstract: A flash memory 1 based on the multilevel storage technology for storing the information of two or more bits is provided with four banks 2a to 2d. For example, in the left side of the bank 2a, a data latch 6a is provided along one short side of the bank 2a, while in the right side thereof, a data latch 6b is provided along the other short side of the bank 2a. At the lower side of the data latches 6a, 6b, arithmetic circuits 7a, 7b are provided. The data latches 6a, 6b are respectively formed of SRAMs. A sense latch 5a is divided to one half in the right and left directions with reference to the center of sense latch row. The divided sense latch 5a is connected with the data latches 6a, 6b via the signal lines respectively allocated along both short sides of the bank 2a.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: April 7, 2009
    Assignee: Renesas Technology Corp.
    Inventors: Tsutomu Nakajima, Keiichi Yoshida
  • Patent number: 7463852
    Abstract: An image forming apparatus includes an image carrier configured to form a latent image and a development unit including a development member configured to develop the latent image forming on the image carrier with a developer, and a plurality of conveying members each including at least one spiral vane and configured to rotate around a spiral axis of the spiral vane to revolve and transfer the developer around the spiral axis in a direction along the spiral axis, the plurality of conveying members configured to transfer the developer sequentially from a conveying member to an adjacent conveying member and including a first conveying member arranged at a position closest to the development member to supply developer to the development member, wherein a number of the spiral vanes of the first conveying member are at least two and is also greater than the number of spiral vanes in the remaining conveying members.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: December 9, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichi Yoshida, Yoshio Hattori, Shinichi Kawahara, Takatsugu Fujishiro, Shuji Tanaka
  • Patent number: 7463533
    Abstract: A nonvolatile memory device of the present invention performs a programming operation by accumulating a charge in certain capacitance which is provided for each programming memory cell and injecting hot electrons generated when the charge is discharged via the memory cell into a floating gate. Thus, a variation in a programming characteristic of the nonvolatile semiconductor memory device is reduced, thereby realizing high-speed programming operation.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: December 9, 2008
    Assignee: Renesas Technology Corp.
    Inventors: Hideaki Kurata, Naoki Kobayashi, Shunichi Saeki, Takashi Kobayashi, Takayuki Kawahara, Yoshinori Takase, Keiichi Yoshida, Michitaro Kanamitsu, Shoji Kubono, Atsushi Nozoe
  • Patent number: 7463845
    Abstract: A charging device including a charging member configured to charge an image bearing member while the charging member is contacted with or is located so as to be close to the image bearing member when the charging device is set in an image forming apparatus; and a cleaning member configured to clean a surface of the charging member while contacting the surface of the charging member, wherein the pressure A at which the cleaning member is contacted with the charging member when the charging device is set in the image forming apparatus is greater than the pressure B at which the cleaning member is contacted with the charging member before the charging device is set in the image forming apparatus.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: December 9, 2008
    Assignee: Ricoh Company Limited
    Inventors: Takeo Suda, Shinichi Kawahara, Keiichi Yoshida, Yoshio Hattori, Shuji Tanaka