Patents by Inventor Katsuhiko Maeda

Katsuhiko Maeda 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: 9310708
    Abstract: An optical scanning device includes a light source emitting light to form an image by optical scanning; and a control section generating a control signal, which is for turning on and off the light source, based on an image signal. Further, the control section generates a pulse signal having a predetermined time width when the image signal indicates that the light source is to be turned off.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: April 12, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuhiko Maeda, Tadashi Shinohara, Yuugo Matsuura
  • Patent number: 9312558
    Abstract: In a fuel cell, a cell 105 including an anode 109, a solid electrolyte film 111 and a cathode 113 on an outer peripheral surface of a substrate tube 103 is formed in a circumferential direction of the substrate tube 103. A plurality of the cells 105 are arranged along a longitudinal direction of the substrate tube 103, and an interconnector 107 connecting the cells 105 electrically in series is formed between the adjacent cells 105. A thickness of an end portion of the cathode 113 in the longitudinal direction, the portion being in contact with the interconnector 107, is larger than a thickness of a center portion of the cathode 113 in the longitudinal direction. Thereby, high power generation performance can be achieved.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: April 12, 2016
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takanori Suto, Katsuhiko Maeda, Kenichi Hiwatashi, Seiji Goto
  • Patent number: 9242478
    Abstract: The invention is concerning the writing controlling apparatus that includes an acquiring unit configured to acquire a plurality of light amounts of a light source driven while changing an input current in non-effective scanning periods during which an image carrier is not irradiated with light from the light source, as a plurality of output results; a detecting unit configured to detect characteristics of the light source using the output results thus acquired; and a correcting unit configured to correct a current to be applied to the light source based on the characteristics thus detected.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: January 26, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Masashi Suzuki, Katsuhiko Maeda, Yoshio Kanzaki, Masahiko Oikawa, Yasuhiro Abe, Hiroaki Nishina, Yuuki Honda
  • Publication number: 20150316870
    Abstract: An image forming apparatus for forming an image on a recording medium includes a first photoconductor on which a first intermediate image of a first color is formed; a second photoconductor on which a second intermediate image of a second color is formed, the second color being different from the first color; first and second light sources configured to emit light to the first and second photoconductors, respectively; a light source control unit configured to control the first light source to emit light according to a light emission control signal; a conveyance control signal generation unit configured to generate a conveyance control signal based on the light emitted from the first light source according to the light emission control signal; and a conveyance unit configured to convey the recording medium based on the conveyance control signal, upon transferring the second intermediate image onto the recording medium.
    Type: Application
    Filed: April 28, 2015
    Publication date: November 5, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventor: Katsuhiko Maeda
  • Patent number: 9170516
    Abstract: An image forming apparatus includes: an image forming unit that forms a pattern image for image quality adjustment on an image carrier; a detection unit that detects the pattern image for the image quality adjustment; an image quality adjustment control unit that controls an image quality adjustment process in accordance with a result of detection of the detection unit; a reception unit that receives a color mode selected from among a plurality of kinds of color modes; and a calculation unit that calculates a total pattern length so that a total length of the pattern image for the image quality adjustment in a sub-scanning direction is equal in any of the color modes, wherein the image forming unit forms the pattern image for the image quality adjustment so that the total length of the pattern image for the image quality adjustment is equal to the calculated total pattern length.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: October 27, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Yuichiro Shukuya, Katsuhiko Maeda
  • Patent number: 9063455
    Abstract: A light-emitting substrate including: a first and second light-emitting devices each including terminals; and a substrate including a first hole and a second hole, the first hole and the second hole respectively having at least one receiving portion, wherein the receiving portion of the first hole receives the terminal of the first light-emitting device, and the receiving portion of the second hole receives the terminal of the second light-emitting device, a first line drawn through a center of the receiving portion of the first hole and a center of the first hole, and a second line drawn through a center of the receiving portion of the second hole and a center of the second hole are not aligned in line.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: June 23, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Katsuhiko Maeda, Hiroyuki Basho, Masashi Suzuki, Yuugo Matsuura
  • Publication number: 20150162636
    Abstract: In a fuel cell, a cell 105 including an anode 109, a solid electrolyte film 111 and a cathode 113 on an outer peripheral surface of a substrate tube 103 is formed in a circumferential direction of the substrate tube 103. A plurality of the cells 105 are arranged along a longitudinal direction of the substrate tube 103, and an interconnector 107 connecting the cells 105 electrically in series is formed between the adjacent cells 105. A thickness of an end portion of the cathode 113 in the longitudinal direction, the portion being in contact with the interconnector 107, is larger than a thickness of a center portion of the cathode 113 in the longitudinal direction. Thereby, high power generation performance can be achieved.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 11, 2015
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takanori Suto, Katsuhiko Maeda, Kenichi Hiwatashi, Seiji Goto
  • Publication number: 20150054902
    Abstract: An optical scanning device includes a light source emitting light to form an image by optical scanning; and a control section generating a control signal, which is for turning on and off the light source, based on an image signal. Further, the control section generates a pulse signal having a redetermined time width when the image signal indicates that the light source is to be turned off.
    Type: Application
    Filed: July 18, 2014
    Publication date: February 26, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Katsuhiko MAEDA, Tadashi SHINOHARA, Yuugo MATSUURA
  • Patent number: 8866865
    Abstract: An image forming apparatus includes a light source that emits light beams for scanning a photoconductive element and for image forming of image data, a storage unit that stores a correction amount of a turn-on time of the light source associated with a preset turn-on pattern of the light beams, an acquiring unit that compares a pattern of the image data with the turn-on pattern, so as to acquire the correction amount corresponding to the pattern of the image data which is associated with the turn-on pattern, from the storage unit; and a light source controller that controls turn-on of the light source by a turn-on time corrected with acquired correction amount.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: October 21, 2014
    Assignee: Ricoh Company, Limited
    Inventor: Katsuhiko Maeda
  • Publication number: 20140198469
    Abstract: An electronic circuit having an electronic component mounted on a substrate, a light source device having the electronic circuit, and a method of manufacturing the electronic circuit on which the electronic component is mounted on the substrate are described. The electronic component has a plurality of lead pins to be electrically connected to wirings on the substrate. The substrate is formed with a hole having a larger dimension than a maximum distance between at least two lead pins of the lead pins. The lead pins are inserted into the hole from sides of tips of the lead pins while being bent at a plurality of bending portions, and fixed to the substrate by a solder.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 17, 2014
    Inventors: Hiroyuki BASHO, Katsuhiko MAEDA, Masashi SUZUKI, Yuugo MATSUURA
  • Publication number: 20140168343
    Abstract: The invention is concerning the writing controlling apparatus that includes an acquiring unit configured to acquire a plurality of light amounts of a light source driven while changing an input current in non-effective scanning periods during which an image carrier is not irradiated with light from the light source, as a plurality of output results; a detecting unit configured to detect characteristics of the light source using the output results thus acquired; and a correcting unit configured to correct a current to be applied to the light source based on the characteristics thus detected.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 19, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Masashi SUZUKI, Katsuhiko MAEDA, Yoshio KANZAKI, Masahiko OIKAWA, Yasuhiro ABE, Hiroaki NISHINA, Yuuki HONDA
  • Publication number: 20140072317
    Abstract: An image forming apparatus includes: an image forming unit that forms a pattern image for image quality adjustment on an image carrier; a detection unit that detects the pattern image for the image quality adjustment; an image quality adjustment control unit that controls an image quality adjustment process in accordance with a result of detection of the detection unit; a reception unit that receives a color mode selected from among a plurality of kinds of color modes; and a calculation unit that calculates a total pattern length so that a total length of the pattern image for the image quality adjustment in a sub-scanning direction is equal in any of the color modes, wherein the image forming unit forms the pattern image for the image quality adjustment so that the total length of the pattern image for the image quality adjustment is equal to the calculated total pattern length.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 13, 2014
    Inventors: Yuichiro SHUKUYA, Katsuhiko Maeda
  • Publication number: 20140063168
    Abstract: A light-emitting substrate including: a first and second light-emitting devices each including terminals; and a substrate including a first hole and a second hole, the first hole and the second hole respectively having at least one receiving portion, wherein the receiving portion of the first hole receives the terminal of the first light-emitting device, and the receiving portion of the second hole receives the terminal of the second light-emitting device, a first line drawn through a center of the receiving portion of the first hole and a center of the first hole, and a second line drawn through a center of the receiving portion of the second hole and a center of the second hole are not aligned in line.
    Type: Application
    Filed: August 12, 2013
    Publication date: March 6, 2014
    Inventors: Katsuhiko MAEDA, Hiroyuki Basho, Masashi Suzuki, Yuugo Matsuura
  • Patent number: 8603339
    Abstract: Excess sludge production in a bioreactor of a wastewater treatment plant in which excess sludge is being produced is reduced by adding an activated sludge material having a chitinase specific activity of at least 150 Units/g-MLSS and a pectinase specific activity of at least 120 Units/g-MLSS to the bioreactor. After the addition of the activated sludge material, the bioreactor is controlled by adding the activated sludge material when any one of the chitinase activity, the pectinase activity, and the protease specific of the sludge in the bioreactor drops below the lower limits of 50 Units/L, 40 Units/L, and 0.3 Units/L, respectively.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: December 10, 2013
    Assignee: Diamond Engineering Co., Ltd.
    Inventors: Katsuhiko Maeda, Minoru Okamoto
  • Patent number: 8422903
    Abstract: A pattern forming unit forms a pattern for correcting a position shift of an image. A detecting unit detects the pattern. A measuring unit measures a time from a start of a control signal for controlling timing to start forming the image until a detection of the pattern. A control unit controls a position of forming the image based on the time measured by the measuring unit.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: April 16, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Katsuhiko Maeda
  • Patent number: 8305416
    Abstract: An image forming apparatus includes light sources, a light intensity controller, an optical writing unit, a controller, and an image forming unit. The light sources are switchable between activated and deactivated conditions according to supplied image data. The light intensity controller controls light intensity of the light sources. In the optical writing unit, light beams output from the light sources are deflected in a main scanning direction. The controller sets a given number of light sources to activated condition to write a latent image on an image bearing member according to an image forming line speed. The controller instructs the given number of light sources to emit light beams onto an image area on the image bearing member, and instructs all of the light sources to emit light beams at a blank area on the image bearing member to execute a light intensity control for all of the light sources.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: November 6, 2012
    Assignee: Ricoh Company, Ltd.
    Inventor: Katsuhiko Maeda
  • Publication number: 20120118360
    Abstract: A solar cell module, a solar cell panel, a process for producing a solar cell module and a process for producing a solar cell panel that are capable of inhibiting EVA protrusions and recesses, and capable of inhibiting penetration of moisture into the interior of the solar cell module. The solar cell module comprises a transparent substrate and a back substrate disposed across a photovoltaic layer, an inner seal portion disposed between, and surrounding the periphery of, the transparent substrate and the back substrate, a gap formed in a portion of the inner seal portion and linking a region in which an encapsulant is disposed with the outside, an encapsulant disposed inside the region surrounded by the transparent substrate, the back substrate and the inner seal portion, and an outer seal portion that covers the gap.
    Type: Application
    Filed: September 30, 2009
    Publication date: May 17, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Maeda, Tatsuji Horioka, Junji Ooka, Takashi Kitamura, Shinichiro Mamase
  • Publication number: 20120103401
    Abstract: A solar cell panel that is capable of preventing damage to the edge portions of the panel. The solar cell panel is provided with a pair of first protective ribs (103L, 103L), which are fixed to the back substrate, protrude outward from the edges of a solar cell module (2) and are disposed in an opposing manner, a pair of support ribs (3S, 3S), which are fixed to the back substrate and are disposed across the space between the pair of first protective ribs (103L, 103L) at positions distant from the edges of the back substrate, and a pair of second protective ribs (104P, 104P), which are disposed across the space between the pair of first protective ribs (103L, 103L) and protrude outward from the edges of the solar cell module (2).
    Type: Application
    Filed: September 30, 2009
    Publication date: May 3, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Kitamura, Tatsuji Horioka, Katsuhiko Maeda, Junji Ooka, Shinichiro Mamase
  • Publication number: 20110228030
    Abstract: An image forming apparatus includes a light source that emits light beams for scanning a photoconductive element and for image forming of image data, a storage unit that stores a correction amount of a turn-on time of the light source associated with a preset turn-on pattern of the light beams, an acquiring unit that compares a pattern of the image data with the turn-on pattern, so as to acquire the correction amount corresponding to the pattern of the image data which is associated with the turn-on pattern, from the storage unit; and a light source controller that controls turn-on of the light source by a turn-on time corrected with acquired correction amount.
    Type: Application
    Filed: March 17, 2011
    Publication date: September 22, 2011
    Inventor: Katsuhiko MAEDA
  • Patent number: 7940422
    Abstract: An image forming apparatus for forming a multicolor image by superposing single-color images of respective colors is disclosed. The image forming apparatus includes an image formation control unit configured to select and form a misalignment correction pattern used in a misalignment correction process for correcting misalignment between the single-color images. The image formation control unit selects the misalignment correction pattern according to either a status change detected or the number of images formed after a previous misalignment correction process is performed.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: May 10, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Katsuhiko Maeda