Patents by Inventor Yuji Kurokawa

Yuji Kurokawa 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: 20210277798
    Abstract: A securing tool for a heat retention block covering a turbine casing main body includes: a securing rod, one end of which has an engaging portion with a protrusion; and a socket. The socket includes a guide groove, into which the protrusion of the securing rod is inserted, and a recessed groove. The guide groove includes a first guide groove, which extends in the socket axis direction from a starting end to a terminal end, and a second guide groove, the starting end of which is connected to the terminal end, and which extends from the starting end to a terminal end in a circumferential direction relative to the socket axis. The second guide groove is connected to the recessed groove.
    Type: Application
    Filed: May 11, 2018
    Publication date: September 9, 2021
    Inventors: Hyota ABE, Yuji KUROKAWA, Takuya IZUMI, Takeshi NAKAO, Keisuke IDE, Osamu KOGA
  • Publication number: 20210071813
    Abstract: A method of maintaining a backpressure of a fluidic product is provided. The method includes pressurizing a first reservoir to a first predetermined pressure level using compressed air, delivering the fluidic product to the pressurized first reservoir until a current level of the fluidic product in the first reservoir reaches a first predetermined level, pressurizing a second reservoir to a second predetermined pressure level using the compressed air, delivering the fluidic product to the pressurized second reservoir until a current level of the fluidic product in the second reservoir reaches a second predetermined level, and controlling the backpressure of the fluidic product using the first reservoir and the second reservoir such that a discharge flow of the fluidic product is continuous.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 11, 2021
    Inventors: Yuji KUROKAWA, Toshiya MATSUMOTO, Kenji YATABE, Isamu UMEDA
  • Patent number: 9623685
    Abstract: Disclosed is an inspecting chart including a reference pattern containing a first line segment group and a second line segment group, a first-side deviation pattern, and a second-side deviation pattern. The first line segment group is formed by a plurality of first line segments printed by a reference printing head at a first given interval. The second line segment is formed by second line segments printed by a printing head on a center between two adjacent first line segments or a center of each of the first line segments, the printing head being spaced away from the reference printing head in the transportation direction of a print medium. The first-side deviation pattern and the second-side deviation pattern are printed with various deviations.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: April 18, 2017
    Assignees: SCREEN Holdings Co., Ltd., RICOH COMPANY, LTD.
    Inventors: Yuji Kurokawa, Takaharu Yamamoto, Kazuyuki Tanoue, Hiroaki Kishida, Kunio Muraji
  • Publication number: 20160279980
    Abstract: Disclosed is an inspecting chart including a reference pattern containing a first line segment group and a second line segment group, a first-side deviation pattern, and a second-side deviation pattern. The first line segment group is formed by a plurality of first line segments printed by a reference printing head at a first given interval. The second line segment is formed by second line segments printed by a printing head on a center between two adjacent first line segments or a center of each of the first line segments, the printing head being spaced away from the reference printing head in the transportation direction of a print medium. The first-side deviation pattern and the second-side deviation pattern are printed with various deviations.
    Type: Application
    Filed: June 6, 2016
    Publication date: September 29, 2016
    Inventors: Yuji KUROKAWA, Takaharu YAMAMOTO, Kazuyuki TANOUE, Hiroaki KISHIDA, Kunio MURAJI
  • Patent number: 9370937
    Abstract: Disclosed is an inspecting chart including a reference pattern containing a first line segment group and a second line segment group, a first-side deviation pattern, and a second-side deviation pattern. The first line segment group is formed by a plurality of first line segments printed by a reference printing head at a first given interval. The second line segment is formed by second line segments printed by a printing head on a center between two adjacent first line segments or a center of each of the first line segments, the printing head being spaced away from the reference printing head in a the transportation direction of a print medium. The first-side deviation pattern and the second-side deviation pattern are printed with various deviations.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: June 21, 2016
    Assignees: SCREEN Holdings Co., Ltd., RICOH COMPANY, LTD.
    Inventors: Yuji Kurokawa, Takaharu Yamamoto, Kazuyuki Tanoue, Hiroaki Kishida, Kunio Muraji
  • Patent number: 9365047
    Abstract: Disclosed is an inkjet printing apparatus including a printing head, an overcoating head discharging an overcoating agent, and a controller operating the printing head and the overcoating head to perform printing to a print medium. The controller operates in a normal discharge mode having a printing rate in the print medium relative to a given area of less than 100% for printing to the print medium, and an inspecting discharge mode having a printing rate in the print medium relative to the given area higher than the printing rate of the normal discharge mode for confirming a discharge state of the overcoating agent. In the inspecting discharge mode, the controller operates the printing head to form an inspecting region on the print medium, and operates the overcoating head to discharge the overcoating agent onto the inspecting region, whereby an overcoating inspecting chart is formed.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: June 14, 2016
    Assignees: SCREEN Holdings Co., Ltd., RICOH COMPANY, LTD.
    Inventors: Yuji Kurokawa, Atsushi Imamura
  • Publication number: 20150273887
    Abstract: Disclosed is an inspecting chart including a reference pattern containing a first line segment group and a second line segment group, a first-side deviation pattern, and a second-side deviation pattern. The first line segment group is formed by a plurality of first line segments printed by a reference printing head at a first given interval. The second line segment is formed by second line segments printed by a printing head on a center between two adjacent first line segments or a center of each of the first line segments, the printing head being spaced away from the reference printing head in a the transportation direction of a print medium. The first-side deviation pattern and the second-side deviation pattern are printed with various deviations.
    Type: Application
    Filed: March 6, 2015
    Publication date: October 1, 2015
    Inventors: Yuji Kurokawa, Takaharu YAMAMOTO, Kazuyuki TANOUE, Hiroaki KISHIDA, Kunio MURAJI
  • Publication number: 20150273918
    Abstract: Disclosed is an inkjet printing apparatus including a printing head, an overcoating head discharging an overcoating agent, and a controller operating the printing head and the overcoating head to perform printing to a print medium. The controller operates in a normal discharge mode having a printing rate in the print medium relative to a given area of less than 100% for printing to the print medium, and an inspecting discharge mode having a printing rate in the print medium relative to the given area higher than the printing rate of the normal discharge mode for confirming a discharge state of the overcoating agent. In the inspecting discharge mode, the controller operates the printing head to form an inspecting region on the print medium, and operates the overcoating head to discharge the overcoating agent onto the inspecting region, whereby an overcoating inspecting chart is formed.
    Type: Application
    Filed: February 24, 2015
    Publication date: October 1, 2015
    Inventors: Yuji KUROKAWA, Atsushi IMAMURA
  • Patent number: 8111428
    Abstract: In a halftone image formed on a printing plate for letterpress printing, a minimum halftone dot has a square main cluster consisting of 9 pixels and four sub-clusters located around the main cluster radially, each of which is one pixel. Each sub-cluster contacts with only a vertex of the main cluster. Convex portions corresponding to the minimum halftone dots in the halftone image are formed on the printing plate. A convex portion corresponding to the main cluster is supported by convex portions corresponding to the sub-clusters to increase the strength of relief corresponding to the minimum halftone dot. Reliefs corresponding to the minimum halftone dots are normally formed regardless of a dot area rate of highlight area to thereby improve reproduction in printing of the halftone image.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: February 7, 2012
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Hiroshi Asai, Yuji Kurokawa, Masaru Wakui
  • Publication number: 20110222126
    Abstract: An ejection part (3) in an inkjet printer (1) has ejection mechanisms (31a to 31d) for ejecting fine droplets of colored ink and an ejection mechanism (32) for ejecting fine droplets of clear ink, and a colored image is formed on a colored image print area of print medium (9) by the ejection mechanisms (31a to 31d). By the ejection mechanism (32), the colored image on the print medium (9) is coated with the clear ink and a code image is formed on a blank area around the colored image print area. In the inkjet printer (1), since the coating of the colored image and the forming of the code image are performed with the same clear ink ejected from the one ejection mechanism (32), improvement of wear resistance and improvement of security of the colored image can be achieved while reducing manufacturing cost of the apparatus of the inkjet printer (1).
    Type: Application
    Filed: March 4, 2010
    Publication date: September 15, 2011
    Applicant: DAINIPPON SCREEN MFG. CO., LTD.
    Inventors: Hiroshi Asai, Yuji Kurokawa, Takaharu Yamamoto, Kazuma Kan, Makoto Narazaki
  • Patent number: 7868908
    Abstract: An image recording apparatus according to this invention includes a frequency divider 22 for generating a reference signal of a frequency higher than that of a dot clock signal, a pulse exposure control circuit 31 for causing a laser beam emitted from a laser diode 27 to irradiate a recording medium when both an image signal and the reference signal are ON, and a switching device 25 for switching between a first recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when the image signal is ON, and a second recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when both the image signal and reference signal are ON.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: January 11, 2011
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Hiroshi Okamoto, Hiroyuki Fujisawa, Yuji Kurokawa, Keisuke Hirayama, Hitoshi Shioda
  • Patent number: 7659525
    Abstract: An image recording apparatus (1) causes a recording head (20) to move through a distance corresponding to one half of the recording width of the recording head (20) in a sub-scanning direction each time a recording drum (10) makes one rotation. This, light emitting devices (23, 24) record two line data in advance, and thereafter following light emitting devices (21, 22) record the same line data repeatedly at the same position. This increases the energy of laser light beams given to a recording position on a printing plate (P) to accomplish the recording of an image with reliability. The recording speed is not extremely decreased because not all light emitting devices (21 to 24) are used to make the repeated recordings at the same position on the printing plate (P). Further, the construction of optical systems and driving systems in the image recording apparatus is not complicated.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: February 9, 2010
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Hideaki Ogawa, Hiroshi Okamoto, Keisuke Hirayama, Yuji Kurokawa, Hiroyuki Fujisawa, Ichiro Watanabe
  • Patent number: 7645058
    Abstract: To provide a light diffusing sheet which enables the light from a lightguide plate or light source of a backlight unit to be conducted to lens film after having been converted to diffused light having a small brightness peak angle, and which generates neither a moiré or interference fringe nor luminance unevenness, and is advantageous also in terms of productivity and cost, and to provide a backlight unit having this light diffusing sheet incorporated therein, and the surface of the sheet with fine recesses formed therein serves as a light emission side. The light diffusing sheet comprises a light-transmitting resin, characterized by having fine recesses formed in at least one of the surfaces thereof, the fine recesses having a shape which is any of the shapes of an inverted polyangular pyramid, an inverted truncated polyangular pyramid, an inverted cone, and an inverted truncated cone.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: January 12, 2010
    Assignee: Takiron Co., Ltd.
    Inventors: Yuji Kurokawa, Yutaka Omura
  • Publication number: 20090262428
    Abstract: A subject for the invention is to provide: a light diffusing sheet which, when incorporated in a direct-backlight unit, brings about high uniformity of luminance and a high average luminance; and a backlight unit having the sheet incorporated therein. The light diffusing sheet of the invention is made of a light-transmitting resin and has a sheet upper surface serving as a light emission side and a sheet lower surface serving as a light entrance side.
    Type: Application
    Filed: August 27, 2007
    Publication date: October 22, 2009
    Applicant: TAKIRON CO., LTD.
    Inventor: Yuji Kurokawa
  • Publication number: 20090262398
    Abstract: In a halftone image formed on a printing plate for letterpress printing, a minimum halftone dot has a square main cluster consisting of 9 pixels and four sub-clusters located around the main cluster radially, each of which is one pixel. Each sub-cluster contacts with only a vertex of the main cluster. Convex portions corresponding to the minimum halftone dots in the halftone image are formed on the printing plate. A convex portion corresponding to the main cluster is supported by convex portions corresponding to the sub-clusters to increase the strength of relief corresponding to the minimum halftone dot. Reliefs corresponding to the minimum halftone dots are normally formed regardless of a dot area rate of highlight area to thereby improve reproduction in printing of the halftone image.
    Type: Application
    Filed: March 5, 2009
    Publication date: October 22, 2009
    Inventors: Hiroshi ASAI, Yuji KUROKAWA, Masaru Wakui
  • Publication number: 20080205457
    Abstract: An image recording apparatus according to this invention includes a frequency divider 22 for generating a reference signal of a frequency higher than that of a dot clock signal, a pulse exposure control circuit 31 for causing a laser beam emitted from a laser diode 27 to irradiate a recording medium when both an image signal and the reference signal are ON, and a switching device 25 for switching between a first recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when the image signal is ON, and a second recording mode for causing the laser beam emitted from the laser diode 27 to irradiate the recording medium when both the image signal and reference signal are ON.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 28, 2008
    Inventors: Hiroshi Okamoto, Hiroyuki Fujisawa, Yuji Kurokawa, Keisuke Hirayama, Hitoshi Shioda
  • Patent number: 7297908
    Abstract: The present invention provides a removing method of a tube. Upon removing a tube 3 increased in diameter and fixed to a tube-sheet 1, an inserted portion 3a which is fixed to a tube-hole 2 of the tube-sheet 1 is heated and then cooled, thereby reducing its diameter. The inserted portion 3a is loosened from the tube-hole 2. Then, a region 3h opposed to a groove 4 formed in an inner circumference of the tube-hole is heated to a red-hot state, and the tube 3 is stretched in its axial direction, the red-heated region 3h is stretched to reduce its diameter and cut the region 3h, thereby pulling out the tube 3 from the tube-sheet 1.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: November 20, 2007
    Assignee: Dai-Ichi High Frequency Co., Ltd.
    Inventors: Hirotaka Yoshida, Michio Sato, Yuji Kurokawa
  • Publication number: 20070224527
    Abstract: An image recording apparatus (1) causes a recording head (20) to move through a distance corresponding to one half of the recording width of the recording head (20) in a sub-scanning direction each time a recording drum (10) makes one rotation. This, light emitting devices (23, 24) record two line data in advance, and thereafter following light emitting devices (21, 22) record the same line data repeatedly at the same position. This increases the energy of laser light beams given to a recording position on a printing plate (P) to accomplish the recording of an image with reliability. The recording speed is not extremely decreased because not all light emitting devices (21 to 24) are used to make the repeated recordings at the same position on the printing plate (P). Further, the construction of optical systems and driving systems in the image recording apparatus is not complicated.
    Type: Application
    Filed: March 21, 2007
    Publication date: September 27, 2007
    Inventors: Hideaki Ogawa, Hiroshi Okamoto, Keisuke Hirayama, Yuji Kurokawa, Hiroyuki Fujisawa, Ichiro Watanabe
  • Publication number: 20070171671
    Abstract: [Problem]To provide a light diffusing sheet which enables the light from a lightguide plate or light source of the backlight unit to be conducted to lens film after having been converted to diffused light having a small brightness peak angle, and which generates neither a moiré or interference fringe nor luminance unevenness, and is advantageous also from the standpoints of productivity and cost, and to provide a backlight unit having this light diffusing sheet incorporated therein. [Means for Solution] The invention is composed of a light diffusing sheet 10 comprising a light-transmitting resin, characterized by having fine recesses formed in at least one of the surfaces 2 thereof, the fine recesses 3 having a shape which is any of the shape of an inverted polyangular pyramid, the shape of an inverted truncated polyangular pyramid, the shape of an inverted cone, and the shape of an inverted truncated cone.
    Type: Application
    Filed: February 25, 2005
    Publication date: July 26, 2007
    Inventors: Yuji Kurokawa, Yutaka Omura
  • Publication number: 20050235473
    Abstract: The present invention provides a removing method of a tube. Upon removing a tube 3 increased in diameter and fixed to a tube-sheet 1, an inserted portion 3a which is fixed to a tube-hole 2 of the tube-sheet 1 is heated and then cooled, thereby reducing its diameter. The inserted portion 3a is loosened from the tube-hole 2. Then, a region 3h opposed to a groove 4 formed in an inner circumference of the tube-hole is heated to a red-hot state, and the tube 3 is stretched in its axial direction, the red-heated region 3h is stretched to reduce its diameter and cut the region 3h, thereby pulling out the tube 3 from the tube-sheet 1.
    Type: Application
    Filed: April 7, 2005
    Publication date: October 27, 2005
    Applicant: DAI-ICHI HIGH FREQUENCY CO., LTD.
    Inventors: Hirotaka Yoshida, Michio Sato, Yuji Kurokawa