Patents by Inventor Kazuya Yamamoto

Kazuya Yamamoto 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).

  • Sheet discharging device, image forming system, and sheet discharging method
    Patent number: 8936240
    Abstract: A sheet discharging device includes a shift tray 202 on which a sheet P1 is stacked, a discharging roller 6 that discharges a sheet P2 onto the shift tray 202, a blowing device 230 that sends air to a lower surface of the sheet P2 discharged by the discharging roller 6, a blocking member 231 that blocks air sent to the lower surface of the sheet P2 from a blowing port 230-2 of the blowing device 230, and a control unit that controls the blocking amount of the blocking member 231. The blocking amount is determined based upon sheet information including sheet-type information, sheet-size information, and sheet-thickness information, for example.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: January 20, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Tomomichi Hoshino, Masahiro Tamura, Shuuya Nagasako, Tomohiro Furuhashi, Keisuke Sugiyama, Kyosuke Nakada, Kazuya Yamamoto, Akira Kunieda, Takahiro Watanabe, Junya Suzuki, Kazunori Konno, Youhei Niitsuma, Takamasa Matsumoto, Kiichiro Goto, Kazuhiko Kitano, Takashi Fukumoto, Yasuo Niikura, Satoru Takano, Hidetoshi Kojima, Kei Sasaki, Yasushi Tsuruoka, Shintaro Matsumoto, Ryo Takahashi, Yuuta Mori, Kohjiroh Haga
  • SHEET PROCESSING APPARATUS WITH PRESSING UNIT, AND IMAGE FORMING SYSTEM
    Publication number: 20150014387
    Abstract: A sheet processing apparatus includes: a stacking unit that stacks conveyed sheets; an aligning unit that aligns the sheets stacked on the stacking unit in a sheet conveying direction; a binding unit that moves along an end portion of a bundle of the sheets on a binding portion side and performs a binding process for the bundle of the sheets that have been aligned by the aligning unit; a pressing unit that presses the bundle of the sheets at the end portion thereof on the binding portion side; and an interlocking unit that moves the pressing unit in association with a motion of the binding unit.
    Type: Application
    Filed: September 23, 2014
    Publication date: January 15, 2015
    Applicant: RICOH COMPANY, LIMITED
    Inventor: Kazuya YAMAMOTO
  • Sheet folding device having inclined stacking surface
    Patent number: 8931773
    Abstract: A sheet handling apparatus includes a sheet folding unit configured to perform folding on a sheet; and a sheet stacking unit configured to stack the folded sheet on a sheet stacking surface having an inclined surface and a horizontal surface in order from upstream to downstream in a sheet conveying direction. A downstream end of the inclined surface is higher than an upstream end of the inclined surface with respect to a horizontal plane. The sheet handling apparatus also includes a discharging unit configured to discharge the folded sheet to the sheet stacking unit; a sheet conveying unit configured to convey the discharged sheet from the inclined surface to the horizontal surface; and a conveying force applying unit configured to apply a conveying force to the sheet in contact with an upper surface of the sheet from above the inclined surface.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Keisuke Sugiyama, Masahiro Tamura, Shuuya Nagasako, Tomohiro Furuhashi, Yuusuke Shibasaki, Kazuya Yamamoto, Kyosuke Nakada, Tomomichi Hoshino, Yasuo Niikura, Junya Suzuki, Kazunori Konno, Akira Kunieda, Takahiro Watanabe, Tomohiro Yoshizaki, Kiichiro Goto
  • Sheet output device, sheet processing apparatus, image forming system, and sheet output method
    Patent number: 8925917
    Abstract: According to an embodiment, provided is a sheet output device including: a sheet output unit configured to output a sheet; a tray unit on which the sheet output by the sheet output unit is to be stacked; an air blower unit configured to blow air onto the sheet output by the sheet output unit; and a control unit configured to control an airflow rate of the air blower unit according to an amount of the sheet output from the sheet output unit.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Takahiro Watanabe, Masahiro Tamura, Shuuya Nagasako, Tomohiro Furuhashi, Keisuke Sugiyama, Kyosuke Nakada, Kazuya Yamamoto, Tomomichi Hoshino, Akira Kunieda, Junya Suzuki, Kazunori Konno, Takamasa Matsumoto, Youhei Niitsuma, Kiichiro Goto
  • Cascode amplifier
    Patent number: 8890622
    Abstract: A cascode amplifier includes: first transistors; second transistors cascode-connected with respective first transistors; a first line connected at spaced points to control terminals of the first transistors; a second line connected at spaced points to control terminals of the second transistors; and a capacitance connected between one end of the second line and ground. The second line includes at least two lines connected in parallel with each other.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: November 18, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Miyo Miyashita, Kazuya Yamamoto, Fumimasa Kitabayashi, Suguru Maki, Eri Fukuda, Katsuya Kato
  • Sheet processing apparatus with pressing unit
    Patent number: 8870176
    Abstract: A sheet processing apparatus includes: a stacking unit that stacks conveyed sheets; an aligning unit that aligns the sheets stacked on the stacking unit in a sheet conveying direction; a binding unit that moves along an end portion of a bundle of the sheets on a binding portion side and performs a binding process for the bundle of the sheets that have been aligned by the aligning unit; a pressing unit that presses the bundle of the sheets at the end portion thereof on the binding portion side; and an interlocking unit that moves the pressing unit in association with a motion of the binding unit.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: October 28, 2014
    Assignee: Ricoh Company, Limited
    Inventor: Kazuya Yamamoto
  • POWER AMPLIFIER
    Publication number: 20140306761
    Abstract: A power amplifier includes: first and second bias terminals to which bias voltages are respectively supplied; a first transistor having a first control terminal connected to the first bias terminal, a first terminal that is grounded, and a second terminal; a second transistor having a second control terminal connected to the second bias terminal, a third terminal connected to the second terminal, and a fourth terminal; a capacitor connected between the second control terminal and a grounding point; and a variable resistor connected in series with the capacitor, between the second control terminal and the grounding point.
    Type: Application
    Filed: January 27, 2014
    Publication date: October 16, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shigeru Fujiwara, Kazuya Yamamoto, Miyo Miyashita, Shigeo Yamabe, Daisuke Kobayashi
  • DIRECTIONAL COUPLER
    Publication number: 20140292440
    Abstract: Disclosed is a directional coupler including a first hollow portion 1301 that is disposed in a first ground conductor 1201 and is arranged directly above a first signal conductor 1001 and a second signal conductor 1002, and that is constructed of a discontinuous structure that has a function of delaying the phase and that is small with respect to the one-quarter wavelength of an operating frequency.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 2, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akimichi HIROTA, Tetsu OWADA, Kazuhiro IYOMASA, Shinsuke WATANABE, Kazuya YAMAMOTO
  • DIRECTIONAL COUPLER
    Publication number: 20140292439
    Abstract: Disclosed is a directional coupler including a broadside coupled line 1031 provided with a main signal line conductor 1001 and a secondary signal line conductor 1011 arranged in parallel with the main signal line conductor 1001, and an offset broadside coupled line 1032 provided with a main signal line conductor 1002 having an end portion connected to an end portion of the main signal line conductor 1001 and a second secondary signal line conductor 1012 having an end portion connected to an end portion of the secondary signal line conductor 1011, and arranged in parallel with the main signal line conductor 1002, in which a coupled line impedance in the broadside coupled line 1031 is lower than a terminal impedance and a coupled line impedance in the offset broadside coupled line 1032 is higher than the terminal impedance.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 2, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hideharu YOSHIOKA, Akimichi HIROTA, Tetsu OWADA, Shinsuke WATANABE, Kazuhiro IYOMASA, Kazuya YAMAMOTO
  • HIGH-FREQUENCY AMPLIFIER MODULE AND HIGH-FREQUENCY AMPLIFIER MODULE UNIT
    Publication number: 20140232467
    Abstract: A high-frequency amplifier module includes a driver-stage amplifier 3 that amplifies an RF signal input thereto from an RF input terminal 1, and a final-stage amplifier 5 that amplifies the signal amplified by the driver-stage amplifier 3 and outputs the signal after the amplification to an RF output terminal 7. The driver-stage amplifier 3 is fabricated on a silicon substrate 11, while the final-stage amplifier 5 is fabricated on a gallium arsenide substrate. This configuration downsizes the cost while maintaining a high-frequency characteristic comparable to that in the case where all components of an entire module are fabricated on a gallium arsenide substrate 71.
    Type: Application
    Filed: August 24, 2012
    Publication date: August 21, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenji Mukai, Kenichi Horiguchi, Morishige Hieda, Katsuya Kato, Yoshihito Hirano, Kazuya Yamamoto, Hiroyuki Joba, Teruyuki Shimura
  • SHEET DISCHARGING DEVICE, IMAGE FORMING SYSTEM, AND SHEET DISCHARGING METHOD
    Publication number: 20140203501
    Abstract: A sheet discharging device includes a shift tray 202 on which a sheet P1 is stacked, a discharging roller 6 that discharges a sheet P2 onto the shift tray 202, a blowing device 230 that sends air to a lower surface of the sheet P2 discharged by the discharging roller 6, a blocking member 231 that blocks air sent to the lower surface of the sheet P2 from a blowing port 230-2 of the blowing device 230, and a control unit that controls the blocking amount of the blocking member 231. The blocking amount is determined based upon sheet information including sheet-type information, sheet-size information, and sheet-thickness information, for example.
    Type: Application
    Filed: March 24, 2014
    Publication date: July 24, 2014
    Applicant: Ricoh Company, Limited
    Inventors: Tomomichi HOSHINO, Masahiro Tamura, Shuuya Nagasako, Tomohiro Furuhashi, Keisuke Sugiyama, Kyosuke Nakada, Kazuya Yamamoto, Akira Kunieda, Takahiro Watanabe, Junya Suzuki, Kazunori Konno, Youhei Niitsuma, Takamasa Matsumoto, Kiichiro Goto, Kazuhiko Kitano, Takashi Fukumoto, Yasuo Niikura, Satoru Takano, Hidetoshi Kojima, Kei Sasaki, Yasushi Tsuruoka, Shintaro Matsumoto, Ryo Takahashi, Yuuta Mori, Kohjiroh Haga
  • Sheet processing apparatus, image forming system, and sheet processing method
    Patent number: 8770569
    Abstract: A sheet processing apparatus is disclosed which includes front and back trailing-end reference fences that are movable and on which the sheet trailing-end abuts to align the sheet trailing-end; a side-stitching stapler that moves along the sheet trailing-end and binds a bundle of sheets aligned; a length-direction moving mechanism that moves the trailing-end reference fences in a sheet conveying direction; and a position changing unit that drives the length-direction moving mechanism to change the position of one of the trailing-end reference fences in the sheet conveying direction relative to the position of the other one. The front and back trailing-end reference fences are moved to change binding positions such that the distances from the sheet trailing-end to staple positions are made equal in front-side binding and in back-side binding.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: July 8, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Tomohiro Furuhashi, Masahiro Tamura, Shuuya Nagasako, Keisuke Sugiyama, Yuusuke Shibasaki, Kazuya Yamamoto, Kyosuke Nakada, Tomomichi Hoshino, Yasuo Niikura, Junya Suzuki, Kazunori Konno, Akira Kunieda, Takahiro Watanabe, Tomohiro Yoshizaki, Kiichiro Goto
  • SHEET FOLDING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE FORMING SYSTEM
    Publication number: 20140179504
    Abstract: A sheet folding apparatus includes: a first sheet conveying unit; a second sheet conveying unit that is disposed downstream of the first sheet conveying unit; a folded part forming unit that forms a folded part on a sheet by nipping a turned-back portion formed on a part of the sheet between the first sheet conveying unit and the second sheet conveying unit; a second conveying path that bifurcates from the first conveying path and in which a sheet with the folded part is conveyed; and a pushing member that is movable between a pushing position at which the pushing member pushes the turned-back portion toward the folded part forming unit and a retracted position. The pushing member also serves as a changing unit that changes a direction of a leading end of the sheet that is conveyed in the first conveying path into a direction toward a second conveying path.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 26, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Kyosuke NAKADA, Tomohiro FURUHASHI, Shuuya NAGASAKO, Kazuya YAMAMOTO, Yuji SUZUKI, Takahiro WATANABE, Michitaka SUZUKI, Akira KUNIEDA, Kiichiro GOTO
  • THIN FILM FORMING METHOD AND THIN FILM FORMING APPARATUS
    Publication number: 20140170320
    Abstract: A thin film forming method for forming a thin film on a workpiece accommodated within a reaction chamber includes a first operation of supplying a first source gas and a second source gas into the reaction chamber, and a second operation of stopping the supply of the first source gas, supplying the second source gas into the reaction chamber and setting an internal pressure of the reaction chamber higher than an internal pressure of the reaction chamber set in the first operation. The first operation and the second operation are alternately repeated a plurality of times.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 19, 2014
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Kazuya YAMAMOTO, Yuichi ITO
  • SHEET FOLDING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE FORMING SYSTEM
    Publication number: 20140171283
    Abstract: A sheet folding apparatus includes: a folded part forming unit that forms a folded part on the sheet by nipping a curved portion formed on a part of the sheet between an upstream first sheet conveying unit and a downstream second sheet conveying unit by holding a part of the sheet by the first sheet conveying unit and applying conveying force to the sheet to reverse the sheet upstream by the second sheet conveying unit; and a sheet leading end detection unit disposed downstream of or at almost same position as the second sheet conveying unit. The sheet is conveyed based on a detection timing of the sheet leading end detection unit such that the leading end of the sheet protrudes by a predetermined protrusion amount from the second sheet conveying unit immediately before applying conveying force to the sheet to reverse the sheet.
    Type: Application
    Filed: November 27, 2013
    Publication date: June 19, 2014
    Applicant: Ricoh Company, Limited
    Inventors: Tomohiro FURUHASHI, Shuuya NAGASAKO, Michitaka SUZUKI, Kazuya YAMAMOTO, Kyosuke NAKADA, Akira KUNIEDA, Takahiro WATANABE, Yuji SUZUKI, Kiichiro GOTO
  • SHEET PROCESSING APPARATUS AND IMAGE FORMING SYSTEM
    Publication number: 20140147184
    Abstract: A sheet processing apparatus includes: a folding processing unit that folds a sheet by reversely rotating a second conveying member in a condition in which the sheet is held by a first and the second conveying members; a calculating unit that calculates an amount of deflection of the sheet held by the first and second conveying members from timings at which the sheet is detected by first and second detecting units disposed upstream of the first conveying member and downstream of the second conveying member and a distance between disposed positions of the first and second detecting units; and a control unit that sets, from the calculated amount of deflection of the sheet, an amount of conveyance for the first conveying member in a direction opposite to a sheet conveying direction in a condition in which the sheet is held by the first and second conveying members.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 29, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Akira KUNIEDA, Tomohiro FURUHASHI, Shuuya NAGASAKO, Michitaka SUZUKI, Kazuya YAMAMOTO, Kyosuke NAKADA, Takahiro WATANABE, Yuuji SUZUKI, Kiichiro GOTO
  • SHEET PROCESSING APPARATUS, IMAGE FORMING SYSTEM, AND SHEET FOLDING METHOD
    Publication number: 20140141956
    Abstract: A sheet processing apparatus includes: a first pair of conveying members that convey a sheet; a second pair of conveying members that receive the sheet conveyed by the first pair of the conveying members and further conveys the sheet to a subsequent stage; and a third pair of conveying members that fold the sheet by rotating the second pair of the conveying members in a reverse direction while the sheet is held by the first pair of the conveying members and the second pair of the conveying members. One of the conveying members of the second pair serves as one of the conveying members of the third pair.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 22, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Yuuji SUZUKI, Tomohiro FURUHASHI, Shuuya NAGASAKO, Akira KUNIEDA, Michitaka SUZUKI, Kyosuke NAKADA, Kazuya YAMAMOTO, Takahiro WATANABE, Kiichiro GOTO
  • Sheet discharging device, sheet processing apparatus, image forming system, and sheet discharging method
    Patent number: 8727345
    Abstract: A sheet discharging device includes: sheet discharging rollers that receive each of sheets conveyed thereto and discharge the sheets one by one; a shift tray on which the sheets discharged by the sheet discharging rollers are to be stacked; an air blower; and a CPU. The air blower forms an air layer between the shift tray and a sheet when the sheet is discharged onto the shift tray by the sheet discharging rollers, or between a sheet and the sheet that is already placed on the shift tray when the sheet is discharged. The CPU controls an air velocity of air to be delivered by the air blower based on sheet information, thereby causing the air layer to extend to the entire surface of the sheet.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: May 20, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Kazunori Konno, Masahiro Tamura, Shuuya Nagasako, Tomohiro Furuhashi, Keisuke Sugiyama, Yuusuke Shibasaki, Kazuya Yamamoto, Kyosuke Nakada, Tomomichi Hoshino, Yasuo Niikura, Junya Suzuki, Akira Kunieda, Takahiro Watanabe, Tomohiro Yoshizaki, Kiichiro Goto
  • CASCODE AMPLIFIER
    Publication number: 20140132358
    Abstract: A cascode amplifier includes: first transistors; second transistors cascode-connected with respective first transistors; a first line connected at spaced points to control terminals of the first transistors; a second line connected at spaced points to control terminals of the second transistors; and a capacitance connected between one end of the second line and ground. The second line includes at least two lines connected in parallel with each other.
    Type: Application
    Filed: June 3, 2013
    Publication date: May 15, 2014
    Inventors: Miyo Miyashita, Kazuya Yamamoto, Fumimasa Kitabayashi, Suguru Maki, Eri Fukuda, Katsuya Kato
  • Sheet handling apparatus, image forming system, and sheet reception control method
    Patent number: 8702087
    Abstract: A sheet handling apparatus includes a sheet reception unit configured to receive a sheet; an alignment unit configured to align the sheet in a conveying direction of the sheet, a trailing edge of the sheet in the conveying direction coming into contact with the alignment unit; and a moving unit configured to move the alignment unit along the sheet reception unit in the conveying direction. A first position for aligning and binding sheets and a second position located above the first position in the sheet reception unit are set for the alignment unit as receiving positions at which the sheet is received from the sheet reception unit.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: April 22, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Tomohiro Furuhashi, Masahiro Tamura, Shuuya Nagasako, Keisuke Sugiyama, Yuusuke Shibasaki, Kazuya Yamamoto, Kyosuke Nakada, Yasuo Niikura, Junya Suzuki, Kazunori Konno, Tomomichi Hoshino, Akira Kunieda, Takahiro Watanabe, Tomohiro Yoshizaki, Kiichiro Goto