Patents by Inventor Takeshi Kojima

Takeshi Kojima 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: 20160290405
    Abstract: A pressure inside a chamber in which a bearing is arranged is reduced. Thus, a pressure inside an oil tank and the pressure inside the chamber are made lower than atmospheric pressure, and are placed in a minimal or no pressure difference condition. Next, a lubricating oil is supplied from the oil tank into the chamber through power of a liquid transfer pump. The lubricating oil is thus injected into the bearing inside the chamber. Thus, the lubricating oil can be supplied from the oil tank into the chamber while maintaining the pressure at substantially the same level lower than that of the atmospheric pressure. Accordingly, gas can be prevented from dissolving into the lubricating oil which has once been deaerated by a pressure reduction inside the oil tank. In addition, because a driving force of the liquid transfer pump is used for supply of the lubricating oil, it is easy to control the amount of the lubricating oil to be supplied.
    Type: Application
    Filed: March 31, 2016
    Publication date: October 6, 2016
    Inventors: Takeshi KOJIMA, Yuya TAMURA, Keita HASEGAWA, Kazuya SATO, Yuki KONISHI
  • Patent number: 9454106
    Abstract: An image forming apparatus is provided in which, during a continuous sheet passing, in the case where a between-sheets time is short, none of a cleaning mode and a drive OFF mode is performed; in the case where the between-sheets time is of a medium length of time, the cleaning mode is performed but the drive OFF mode is not performed; and in the case where the between-sheets time is long, both the cleaning mode and the drive OFF mode are performed. As a result, degradation of an image bearer due to the cleaning bias is alleviated, decreased productivity due to the cleaning mode is alleviated, a problem is alleviated in which a back surface of a recording medium gets dirty due to toner adhered to a transfer rotation body, and another problem is alleviated in which the service life of a driven member is shortened.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: September 27, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Sho Sekiguchi, Takeshi Kojima, Tomoya Ohmura, Hiroomi Tamura, Tetsuto Ueda, Kazuya Saitoh, Taichi Urayama, Takuya Moriyama, Naoyuki Ozaki
  • Patent number: 9442429
    Abstract: An image forming apparatus includes an image bearer; a developing device; a transfer device; a waste-developer container; a developer collecting device including a collected-developer conveyor, a waste channel, a reuse channel, and a channel switching member to switch a route between the waste channel and the reuse channel; a switching determiner to determine whether to dispose or reuse collected developer; an operating condition data collector to collect and store operating condition data used as a degradation speed index of developer in the developing device; a determination type selector to select, according to the degradation speed index, one of a first determination type based on an operating amount and a second determination type based on developer replacement data indicating an amount of developer replaced with supplied developer in the developing device; and a switching controller to control the channel switching member according to determination made by the switching determiner.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: September 13, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tetsuto Ueda, Hiroomi Tamura, Kazuya Saitoh, Sho Sekiguchi, Hirokatsu Suzuki, Takeshi Kojima, Takuma Iwasaki, Taichi Urayama
  • Patent number: 9429895
    Abstract: A cleaning device comprises: a to-be-cleaned member; a cleaning member that cleans the surface of the to-be-cleaned member; a conveying member that conveys a substance removed from the surface of the to-be-cleaned member to outside of the device; a rotatable collecting member that conveys with its surface the substance toward the conveying member; and a partitioning member that guides the substance from the collecting member to the conveying member. The collecting member comprises a conveying portion that carries and conveys the substance; and a protrusion that protrudes toward an upstream side of the conveying portion in a rotating direction of the collecting member. One end of the partitioning member faces the rotating collecting member, and the other end faces the conveying member. The conveying portion and the protrusion are brought into contact with the partitioning member by the rotation of the collecting member.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: August 30, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Hajime Teraji, Hiromichi Ninomiya, Takeshi Kojima, Michiya Okamoto, Takuma Iwasaki, Shinya Karasawa, Daisuke Sawada, Kentaroh Nodera, Masanori Moro
  • Patent number: 9395678
    Abstract: The waste toner container includes: a waste toner detection unit configured to detect a state in which a toner surface of waste toner at that position is displaced up to a ceiling portion or near the ceiling portion. The waste toner detection unit includes: a flexibility member installed so as to cover an opening portion formed in the ceiling portion or a side wall and is configured to be deformed by a direct or indirect push by the waste toner; and a movable member formed so as to contact the flexibility member from outside of the container and so as to be displaced by the direct or indirect push by the waste toner interposing the flexibility member such that displacement thereof is detected by a detection unit. The displacement of the movable member is limited by a regulating member.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: July 19, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shinya Karasawa, Hiromichi Ninomiya, Takeshi Kojima, Hajime Teraji, Michiya Okamoto, Takuma Iwasaki, Daisuke Sawada, Kentaroh Nodera, Daisuke Tomita, Masanori Moro
  • Publication number: 20160176386
    Abstract: A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.
    Type: Application
    Filed: January 6, 2016
    Publication date: June 23, 2016
    Inventors: Kazuaki MIYATA, Takeshi KOJIMA, Tomoyuki FUTAMURA
  • Publication number: 20160131999
    Abstract: An image forming system includes a post-processing unit capable of performing a post-processing on the sheet on which the toner image is formed. The image forming system is capable of executing a transfer cleaning operation to move toner from a transfer member to an image bearer by electrostatic force caused by cleaning bias applied by a bias applying unit in a state where the image bearer and the transfer member are rotated, to clean the transfer member, as an inter-sheet operation performed when at least one of inter-sheet areas that exist on the image bearer during a successive image forming period. The image forming system is capable of executing a rotation stop operation to stop rotation of the image bearer and the transfer member, as the inter-sheet operation when the post-processing is performed, in addition to the transfer cleaning operation, before or after the transfer cleaning operation is executed.
    Type: Application
    Filed: November 2, 2015
    Publication date: May 12, 2016
    Inventors: Takeshi KOJIMA, Tomoya OHMURA, Sho SEKIGUCHI, Taichi URAYAMA, Kazuya SAITOH, Takuya MORIYAMA, Hiroomi TAMURA, Tetsuto UEDA, Naoyuki OZAKI
  • Patent number: 9316997
    Abstract: An image forming apparatus that includes an image bearer, a developing device to develop a latent image, a transfer device to transfer a developed image from the image bearer, a developer collecting device to collect developer remaining on the image bearer, and a waste-developer container to contain developer to be disposed. The apparatus also includes a switching determiner to perform a determination of a preferred transfer amount of developer in a target period, an estimation of an accumulative consumption of developer in the target period, a determination of whether to dispose or reuse collected developer, and a determination of whether to perform switching between disposal and reuse of the collected developer based on comparison between the preferred transfer amount and the estimated accumulative consumption of developer. The apparatus also includes a switching controller to cause the developer collecting device to perform the switching between disposal and reuse.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: April 19, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuto Ueda, Hiroomi Tamura, Kazuya Saitoh, Sho Sekiguchi, Hirokatsu Suzuki, Takeshi Kojima, Takuma Iwasaki
  • Patent number: 9306130
    Abstract: A method of manufacturing a light-emitting device includes forming a wave length conversion portion on a light-emitting element. The light emitting device includes a light-emitting element which emits light of a predetermined wavelength and a wavelength conversion portion which includes a fluorescent substance which is excited by the light emitted from the light-emitting element so as to emit fluorescence of a wavelength different from the predetermined wavelength, which wavelength conversion portion is formed by including the fluorescent substance, a layered silicate mineral, and an organometallic compound.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: April 5, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventor: Takeshi Kojima
  • Patent number: 9296373
    Abstract: A vehicle turn control system including: a running-condition-information acquisition unit which acquires running-condition information for a vehicle; a brake-manipulation-information acquisition unit which acquires information on manipulation for braking by a driver of the vehicle; and a brake control unit which performs brake control of the vehicle based on the information on manipulation for braking which is acquired by the brake-manipulation-information acquisition unit, and performs brake control for generation of a yaw moment in a body of the vehicle by use of a hydraulic system on the basis of the running-condition information which is acquired by the running-condition-information acquisition unit. The brake control unit imposes a limit on an amount of the brake control for generation of the yaw moment when the brake-manipulation-information acquisition unit acquires the information on manipulation for braking during execution of the brake control for generation of the yaw moment.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: March 29, 2016
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tomoyuki Futamura, Takeshi Kojima, Kazutaka Ohmura
  • Publication number: 20160086988
    Abstract: An imaging apparatus includes a plurality of pixels, a signal holding unit, first and second control electrodes. Each of the plurality of pixels includes a photoelectric conversion unit, and an amplification element to amplify signals based on signal charges generated by the photoelectric conversion unit, in which the plurality of pixels output signals for performing a phase contrast detection type of focal point detection. The signal holding unit is in an electrical pathway between an output node of the photoelectric conversion unit and an input node of the amplification element, in which signals for performing the phase contrast detection type of focal point detection are held. The first control electrode is configured to transfer a signal of the photoelectric conversion unit to the signal holding unit. The second control electrode is configured to transfer a signal for performing the phase difference detection type of focal point detection.
    Type: Application
    Filed: December 1, 2015
    Publication date: March 24, 2016
    Inventors: Yuichiro Yamashita, Masahiro Kobayashi, Itsutaku Sano, Takeshi Kojima
  • Publication number: 20160067947
    Abstract: Provided is a hot-dip galvannealed steel sheet for hot stamping use, in which a base steel sheet contains Si in an amount of 0.7% or more, and which has excellent joint strength at a spot-welded part and can exhibit excellent adhesion to a coating film after hot stamping and coating with requiring little restriction of a hot stamp step. In the hot-dip galvannealed steel sheet, a base steel sheet contains, in mass %, 0.10 to 0.5% of C, 0.7 to 2.5% of Si, 1.5 to 3% of Mn and 0.01 to 0.5% of Al. The hot-dip galvannealed steel sheet is characterized in that the Mn concentration in a plating layer is 0.20% or more, the plated amount is 75 g/m2 or less, and the oxygen concentration at the interface between the plating layer and the base steel sheet is 0.50% or less.
    Type: Application
    Filed: April 22, 2014
    Publication date: March 10, 2016
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO(KOBE STEEL, LTD.)
    Inventors: Takeshi MINOWA, Takeshi KOJIMA, Hiroshi IRIE
  • Patent number: 9268292
    Abstract: An image forming apparatus includes a first image forming device, a plurality of second image forming devices, a first bias voltage supply device, and a second bias voltage supply device. The first image forming device and the second image forming device form a toner image. The first bias voltage supply device applies a bias voltage to a first component of the first image forming device. The second bias voltage supply device applies a bias voltage to a second component of each of the plurality of second image forming devices.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: February 23, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Kojima, Hirotaka Hatta, Toshiya Satoh, Akira Asaoka, Hiroyuki Uenishi, Yusuke Ishizuka
  • Patent number: 9260096
    Abstract: A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: February 16, 2016
    Assignees: NISSIN KOGYO CO., LTD., HONDA MOTOR CO., LTD.
    Inventors: Kazuaki Miyata, Takeshi Kojima, Tomoyuki Futamura
  • Publication number: 20160041504
    Abstract: An image forming apparatus includes an image bearer; a developing device; a transfer device; a waste-developer container; a developer collecting device including a collected-developer conveyor, a waste channel, a reuse channel, and a channel switching member to switch a route between the waste channel and the reuse channel; a switching determiner to determine whether to dispose or reuse collected developer; an operating condition data collector to collect and store operating condition data used as a degradation speed index of developer in the developing device; a determination type selector to select, according to the degradation speed index, one of a first determination type based on an operating amount and a second determination type based on developer replacement data indicating an amount of developer replaced with supplied developer in the developing device; and a switching controller to control the channel switching member according to determination made by the switching determiner.
    Type: Application
    Filed: July 28, 2015
    Publication date: February 11, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tetsuto UEDA, Hiroomi TAMURA, Kazuya SAITOH, Sho SEKIGUCHI, Hirokatsu SUZUKI, Takeshi KOJIMA, Takuma IWASAKI, Taichi URAYAMA
  • Publication number: 20160041509
    Abstract: An image forming apparatus is provided in which, during a continuous sheet passing, in the case where a between-sheets time is short, none of a cleaning mode and a drive OFF mode is performed; in the case where the between-sheets time is of a medium length of time, the cleaning mode is performed but the drive OFF mode is not performed; and in the case where the between-sheets time is long, both the cleaning mode and the drive OFF mode are performed. As a result, degradation of an image bearer due to the cleaning bias is alleviated, decreased productivity due to the cleaning mode is alleviated, a problem is alleviated in which a back surface of a recording medium gets dirty due to toner adhered to a transfer rotation body, and another problem is alleviated in which the service life of a driven member is shortened.
    Type: Application
    Filed: July 28, 2015
    Publication date: February 11, 2016
    Inventors: Sho SEKIGUCHI, Takeshi KOJIMA, Tomoya OHMURA, Hiroomi TAMURA, Tetsuto UEDA, Kazuya SAITOH, Taichi URAYAMA, Takuya MORIYAMA, Naoyuki OZAKI
  • Publication number: 20160032439
    Abstract: Provided is a method for producing a plated steel sheet with high Si content for hot stamping, which is capable of suppressing the generation of unplated portions, while maintaining high bonding strength in a welded part in cases where a galvanized steel sheet containing a large amount of Si, namely, 0.7% or more of Si is used for hot stamping applications. In this production method, a hot-rolled pickled steel sheet or cold-rolled steel sheet containing 0.10-0.5% by mass of C, 0.7-2.5% by mass of Si, 1.0-3% by mass of Mn, and 0.01-0.5% by mass of Al is annealed in a reducing atmosphere and then plated, thereby producing a galvanized steel sheet for hot stamping. This method for producing a galvanized steel sheet for hot stamping is characterized in that the annealing is carried out within the range of 500 to 700° C. for 30 to 270 seconds.
    Type: Application
    Filed: October 15, 2015
    Publication date: February 4, 2016
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeshi KOJIMA, Hiroshi IRIE, Takeshi MINOWA
  • Patent number: 9233674
    Abstract: A turning control device for a vehicle includes: a first standard yaw rate calculation unit that calculates a first standard yaw rate on the basis of detection signals of the lateral acceleration detection unit and the vehicle speed detection unit, a correction unit that corrects the first standard yaw rate, in an increasing direction on the basis of detection signals of a steering amount detection unit and the vehicle speed detection unit, and calculates a second standard yaw rate, a braking force control amount calculation unit that calculates a yaw rate deviation that is a deviation between the second standard yaw rate and an actual yaw rate, which is detected by the yaw rate detection unit, and determines a braking force control amount so as to cancel out the yaw rate deviation, and a braking control unit that controls the braking force on the basis of the braking force control amount determined by the braking force control amount calculation unit.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: January 12, 2016
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tomoyuki Futamura, Takeshi Kojima, Kazutaka Ohmura
  • Patent number: 9224767
    Abstract: In a photoelectric conversion apparatus including a plurality of pixels arranged in a matrix, each pixel including a photoelectric conversion unit, first and second holding units that hold electric charge, a first transfer unit that connects the photoelectric conversion unit and the first holding unit, a second transfer unit that connects the first and second holding units, and a third transfer unit that connects the photoelectric conversion unit and a power supply, each pixel is controlled so that the potential of the third transfer unit for electric charge held in the photoelectric conversion unit is higher than that of the first transfer unit at least during a charge accumulation period of the pixel, and thereafter, the potential of the third transfer unit is higher than that of the photoelectric conversion unit while the potentials of the first and second transfer units are lower than that of the photoelectric conversion unit.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: December 29, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ginjiro Toyoguchi, Yuichiro Yamashita, Takeshi Kojima
  • Patent number: 9224771
    Abstract: An imaging apparatus includes a plurality of pixels, a signal holding unit, first and second control electrodes. Each of the plurality of pixels includes a photoelectric conversion unit, and an amplification element to amplify signals based on signal charges generated by the photoelectric conversion unit, in which the plurality of pixels output signals for performing a phase contrast detection type of focal point detection. The signal holding unit is in an electrical pathway between an output node of the photoelectric conversion unit and an input node of the amplification element, in which signals for performing the phase contrast detection type of focal point detection are held. The first control electrode is configured to transfer a signal of the photoelectric conversion unit to the signal holding unit. The second control electrode is configured to transfer a signal for performing the phase difference detection type of focal point detection.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: December 29, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuichiro Yamashita, Masahiro Kobayashi, Itsutaku Sano, Takeshi Kojima