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).
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Patent number: 11761582Abstract: 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: GrantFiled: August 28, 2020Date of Patent: September 19, 2023Assignee: DHF AMERICA, LLCInventors: Yuji Kurokawa, Toshiya Matsumoto, Kenji Yatabe, Isamu Umeda
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Publication number: 20230184377Abstract: 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: ApplicationFiled: February 13, 2023Publication date: June 15, 2023Inventors: Yuji KUROKAWA, Toshiya MATSUMOTO, Kenji YATABE, Isamu UMEDA
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Patent number: 11441449Abstract: 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: GrantFiled: May 11, 2018Date of Patent: September 13, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hyota Abe, Yuji Kurokawa, Takuya Izumi, Takeshi Nakao, Keisuke Ide, Osamu Koga
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Publication number: 20210277798Abstract: 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: ApplicationFiled: May 11, 2018Publication date: September 9, 2021Inventors: Hyota ABE, Yuji KUROKAWA, Takuya IZUMI, Takeshi NAKAO, Keisuke IDE, Osamu KOGA
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Publication number: 20210071813Abstract: 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: ApplicationFiled: August 28, 2020Publication date: March 11, 2021Inventors: Yuji KUROKAWA, Toshiya MATSUMOTO, Kenji YATABE, Isamu UMEDA
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Patent number: 9623685Abstract: 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: GrantFiled: June 6, 2016Date of Patent: April 18, 2017Assignees: SCREEN Holdings Co., Ltd., RICOH COMPANY, LTD.Inventors: Yuji Kurokawa, Takaharu Yamamoto, Kazuyuki Tanoue, Hiroaki Kishida, Kunio Muraji
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Publication number: 20160279980Abstract: 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: ApplicationFiled: June 6, 2016Publication date: September 29, 2016Inventors: Yuji KUROKAWA, Takaharu YAMAMOTO, Kazuyuki TANOUE, Hiroaki KISHIDA, Kunio MURAJI
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Patent number: 9370937Abstract: 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: GrantFiled: March 6, 2015Date of Patent: June 21, 2016Assignees: SCREEN Holdings Co., Ltd., RICOH COMPANY, LTD.Inventors: Yuji Kurokawa, Takaharu Yamamoto, Kazuyuki Tanoue, Hiroaki Kishida, Kunio Muraji
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Patent number: 9365047Abstract: 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: GrantFiled: February 24, 2015Date of Patent: June 14, 2016Assignees: SCREEN Holdings Co., Ltd., RICOH COMPANY, LTD.Inventors: Yuji Kurokawa, Atsushi Imamura
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Publication number: 20150273918Abstract: 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: ApplicationFiled: February 24, 2015Publication date: October 1, 2015Inventors: Yuji KUROKAWA, Atsushi IMAMURA
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Publication number: 20150273887Abstract: 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: ApplicationFiled: March 6, 2015Publication date: October 1, 2015Inventors: Yuji Kurokawa, Takaharu YAMAMOTO, Kazuyuki TANOUE, Hiroaki KISHIDA, Kunio MURAJI
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Patent number: 8111428Abstract: 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: GrantFiled: March 5, 2009Date of Patent: February 7, 2012Assignee: Dainippon Screen Mfg. Co., Ltd.Inventors: Hiroshi Asai, Yuji Kurokawa, Masaru Wakui
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Publication number: 20110222126Abstract: 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: ApplicationFiled: March 4, 2010Publication date: September 15, 2011Applicant: DAINIPPON SCREEN MFG. CO., LTD.Inventors: Hiroshi Asai, Yuji Kurokawa, Takaharu Yamamoto, Kazuma Kan, Makoto Narazaki
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Patent number: 7868908Abstract: 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: GrantFiled: February 26, 2008Date of Patent: January 11, 2011Assignee: Dainippon Screen Mfg. Co., Ltd.Inventors: Hiroshi Okamoto, Hiroyuki Fujisawa, Yuji Kurokawa, Keisuke Hirayama, Hitoshi Shioda
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Patent number: 7659525Abstract: 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: GrantFiled: March 21, 2007Date of Patent: February 9, 2010Assignee: Dainippon Screen Mfg. Co., Ltd.Inventors: Hideaki Ogawa, Hiroshi Okamoto, Keisuke Hirayama, Yuji Kurokawa, Hiroyuki Fujisawa, Ichiro Watanabe
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Patent number: 7645058Abstract: 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: GrantFiled: February 25, 2005Date of Patent: January 12, 2010Assignee: Takiron Co., Ltd.Inventors: Yuji Kurokawa, Yutaka Omura
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Publication number: 20090262398Abstract: 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: ApplicationFiled: March 5, 2009Publication date: October 22, 2009Inventors: Hiroshi ASAI, Yuji KUROKAWA, Masaru Wakui
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Publication number: 20090262428Abstract: 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: ApplicationFiled: August 27, 2007Publication date: October 22, 2009Applicant: TAKIRON CO., LTD.Inventor: Yuji Kurokawa
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Publication number: 20080205457Abstract: 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: ApplicationFiled: February 26, 2008Publication date: August 28, 2008Inventors: Hiroshi Okamoto, Hiroyuki Fujisawa, Yuji Kurokawa, Keisuke Hirayama, Hitoshi Shioda
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Patent number: 7297908Abstract: 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: GrantFiled: April 7, 2005Date of Patent: November 20, 2007Assignee: Dai-Ichi High Frequency Co., Ltd.Inventors: Hirotaka Yoshida, Michio Sato, Yuji Kurokawa