Patents by Inventor Hiroaki Nishio

Hiroaki Nishio 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: 10520850
    Abstract: An image forming apparatus includes circuitry, a reader, and an exposure device that drives lighting elements aligned in a main scanning direction to form a first test image. The circuitry acquires density of first sub-areas, into which the first test image is divided in the main scanning direction, and calculates first correction data based on density of each of the first sub-areas and average density of the first sub-areas, to correct light amounts of the lighting elements. The exposure device forms a second test image with the light amounts corrected. The circuitry acquires density of second sub-areas, into which the second test image is divided in the main scanning direction, and calculates second correction data based on density of a second sub-area adjacent to each of the second sub-areas, to further correct the light amounts. The second sub-areas are differently located from the first sub-areas in the main scanning direction.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: December 31, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroaki Nishina, Koichi Murota, Yoshinobu Sakaue, Masashi Suzuki, Susumu Narita, Takuma Nishio, Ryo Sato
  • Patent number: 10514646
    Abstract: An image forming apparatus includes a latent image bearer, a latent image writing device, a developing device, a conveyance unit to convey a recording medium, a transfer device, a length data acquisition unit to obtain a length of the recording medium in a conveyance direction of the recording medium, an image forming processor to form a test pattern, and a light quantity correction calculator that acquires image density data of the test pattern and calculates a light quantity correction value to correct a light quantity. The image forming processor sets a position of the test pattern on the recording medium in the conveyance direction of the recording medium and a length of the test pattern in the conveyance direction of the recording medium based on the length of the recording medium in the conveyance direction of the recording medium obtained by the length data acquisition unit.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: December 24, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Susumu Narita, Yoshinobu Sakaue, Ryo Sato, Koichi Murota, Masashi Suzuki, Takuma Nishio, Hiroaki Nishina
  • Patent number: 10437188
    Abstract: An image forming apparatus includes an image reading device; an image forming device including a photoconductor, a charger, an exposure device including a light-emitting element, a memory to store a first correction value for correction a light emission amount of the light-emitting element, and a driver to drive the light-emitting element, a developing device, a transfer device, and a fixing device. The image forming apparatus further includes a processor to calculate a second correction value for correcting the light emission amount, based on density data of image data of a predetermined pattern on a recording medium; calculate a third correction value for correcting the light emission amount, based on the first correction value and the second correction value; and determine, before calculating the third correction value, whether placement of the recording medium on the reading table is correct based on the density data.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: October 8, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Takuma Nishio, Yoshinobu Sakaue, Susumu Narita, Ryo Sato, Koichi Murota, Masashi Suzuki, Hiroaki Nishina
  • Publication number: 20190286005
    Abstract: An image forming apparatus includes circuitry, a reader, and an exposure device that drives lighting elements aligned in a main scanning direction to form a first test image. The circuitry acquires density of first sub-areas, into which the first test image is divided in the main scanning direction, and calculates first correction data based on density of each of the first sub-areas and average density of the first sub-areas, to correct light amounts of the lighting elements. The exposure device forms a second test image with the light amounts corrected. The circuitry acquires density of second sub-areas, into which the second test image is divided in the main scanning direction, and calculates second correction data based on density of a second sub-area adjacent to each of the second sub-areas, to further correct the light amounts. The second sub-areas are differently located from the first sub-areas in the main scanning direction.
    Type: Application
    Filed: February 5, 2019
    Publication date: September 19, 2019
    Inventors: Hiroaki NISHINA, Koichi MUROTA, Yoshinobu SAKAUE, Masashi SUZUKI, Susumu NARITA, Takuma NISHIO, Ryo SATO
  • Patent number: 10362288
    Abstract: Various aspects of a method and a system for image processing are disclosed herein. The method includes processing an input image, which comprises structure information and detail information, using image processing (IP) blocks in an image processing pipeline. One or more of the IP blocks, such as the “lossy” IP blocks, process the input image with at least a partial loss of the detail information. By replacing the “lossy” IP blocks with redesigned image processing (IP) modules, the image processing pipeline reduces or avoids such loss of the detail information. A more efficient implementation of the improved pipeline is realized by using a master IP module when the “lossy” IP blocks are reordered and grouped together in the image processing pipeline. The method is further extended to process 3-D images to reduce or avoid loss of detail information in a 3-D image processing pipeline.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: July 23, 2019
    Assignee: SONY CORPORATION
    Inventors: Xiaogang Dong, Hiroaki Ebi, Jiro Takatori, Alexander Berestov, Kenichi Nishio, Tak Shing Wong
  • Publication number: 20190186335
    Abstract: An air blowing fan device includes an electric motor including a rotation shaft, and an air blowing fan including an attachment portion, a boss portion, and an outer circumferential side air blowing blades. The attachment portion is attached to the rotation shaft. The boss portion includes a tubular portion that is positioned radially outward of the attachment portion and of which the outer diameter dimension is larger than the outer diameter dimension of the electric motor, and a linkage portion. The electric motor is disposed in the tubular portion, the outer circumferential side air blowing blade extends radially outward from an outer circumferential surface of the tubular portion, the linkage portion includes a ventilation hole, and an area occupied by the electric motor and an area occupied by the outer circumferential side air blowing blade partially overlap each other in the direction in which the rotation shaft extends.
    Type: Application
    Filed: November 15, 2018
    Publication date: June 20, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshifumi NISHIO, Hiroaki OTA, Akifumi FUJIMOTO
  • Patent number: 6128822
    Abstract: A method for repairing and/or reinforcing a bulkhead for a bulkhead type heat exchanger having a bulkhead formed of a permeable material comprising the steps of supplying a gas (G-1) containing a metal and/or a metallic compound to one side of the bulkhead, supplying to the other side thereof another gas (G-2) containing a reaction gas adapted to react with a metal and/or a metallic compound to deposit a solid metallic compound said gas (G-1) and said another gas (G-2) being caused to reach the inside of the bulkhead, and then causing said gas (G-1) to react with said another gas (G-2) so as to deposit a solid metallic compound inside the bulkhead, thereby repairing and/or reinforcing the bulkhead of the bulkhead type heat exchanger.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: October 10, 2000
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Akira Kato
  • Patent number: 5908795
    Abstract: A boron-nitride-containing material of multi-component system is obtained at a low cost by heating a mixed powder containing a boride and an oxide in a nitrifying atmosphere, whereby a part or the whole of the oxide is reduced with the element bonded to boron of the boride to convert the raw materials to one or more kinds of an oxide having less bonded oxygen, an acid nitride, a nitride, a carbide, and a boride and also boron nitride is formed. A sintered product of a boron-nitride-containing material is obtained by packing a mixed powder containing borides in a heat-resistant mold and heating the packed powders in a nitrifying atmosphere while restraining the packed powders by the mold. The sintered product is obtained in which neither expansion nor deformation occurred and no cracks formed.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: June 1, 1999
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Hiroyuki Yoshida
  • Patent number: 5633214
    Abstract: A boron-nitride-containing material of multi-component system is obtained at a low cost by heating a mixed powder containing a boride and an oxide in a nitrifying atmosphere, whereby a part or the whole of the oxide is reduced with the element bonded to boron of the boride to convert the raw materials to one or more kinds of an oxide having less bonded oxygen, an acid nitride, a nitride, a carbide, and a boride and also boron nitride is formed. A sintered product of a boron-nitride-containing material is obtained by packing a mixed powder containing borides in a heat-resistant mold and heating the packed powders in a nitrifying atmosphere while restraining the packed powders by the mold. The sintered product is obtained in which neither expansion nor deformation occurred and no cracks formed.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: May 27, 1997
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Hiroyuki Yoshida
  • Patent number: 5250242
    Abstract: A method of producing a ceramic sintered body having a ceramic membrane which comprises a process of applying a precursor capable of converting into a ceramic membrane having a new function through heating onto at least a portion of a ceramic porous body to impart said function of the surface of the ceramic porous body, a process of applying a precursor capable of converting into a gas-impermeable membrane through heating over the whole surface of the porous body, a process of forming the gas-impermeable membrane by heating, a process of conducting hot isostatic pressing to the porous body, and a process of removing said gas-impermeable membrane. Ceramic sintered bodies having a dense ceramic membrane on the surface can be produced efficiently in very short processes.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: October 5, 1993
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Keiji Watanabe, Michitaka Sato
  • Patent number: 5188793
    Abstract: A dewaxing method of a metal and/or ceramic molded body which comprises immersing the metal and/or ceramic molded body formed through a plastic molding in a boiling solvent to extract the dispersion medium contained in the molded body with said solvent. According to the method of the invention, the dewaxing time can be shortened from about 150 hours to the sum of about 54 hours for the solvent extraction and about 11 hous for dewaxing under heating. The dewaxed molded body is a sound body containing no crack nor expansion.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: February 23, 1993
    Assignee: NKK Corporation
    Inventor: Hiroaki Nishio
  • Patent number: 5130196
    Abstract: Easily processable, polyolefin hot-melt adhesive conjugate fibers which are unnecessary to apply any oiling agent at the time of spinning and drawing steps, and a formed product such as non-woven fabric, filter for water treatment, etc. obtained by heat-treating the conjugate fibers are provided, which conjugate fibers comprise polyolefin hot-melt adhesive conjugate fibers composed of two different kinds of polyolefins having different melting points by 20.degree. C. or more and constituted so that the lower melting polyolefin can occupy at least one portion of the fiber surface, the lower melting polyolefin having monoglyceride of 12C or more fatty acid in 3 to 10 weight % incorporated thereinto.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: July 14, 1992
    Assignee: Chisso Corporation
    Inventors: Hiroaki Nishio, Takeshi Noma
  • Patent number: 5114749
    Abstract: A method for manufacturing carbon material having good resistance to oxidation, comprising coating carbon material, which is a sintered body or a porous body, with an inorganic polysilazane; heating the carbon material coated with the inorganic polysilazane in an inert atmosphere to form amorphous silicon nitride on the surface of the carbon material; and reheating the heated carbon material in a non-nitriding and non-oxidizing atmosphere, the amorphous silicon nitride being decomposed and silicon carbide being formed on the surface of the carbon material; the reheating being conducted at a temperature of 1300.degree. C. to 1900.degree. C. and the non-nitriding and non-oxidizing atmosphere having a partial pressure of nitrogen determined with reference to a graph wherein the abscissa is a temperature in .degree.C. and the ordinate is partial pressure of nitrogen in atmospheres, the partial pressure being defined within an area under a line connecting a first point corresponding to 1300.degree. C. and 0.
    Type: Grant
    Filed: July 18, 1990
    Date of Patent: May 19, 1992
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Keiji Watanabe, Michitaka Sato
  • Patent number: 5112577
    Abstract: An apparatus for removing the dispersion medium in a metal or ceramic molded body which comprises a dispersion medium-removing vessel includes a condensing zone located in a upper part and a boiling zone located in a lower part, a separator to separater a solvent in the dispersion medium solution discharged from the vessel by heating the solution at a temperature higher than the boiling point of the solvent to evaporate it, the boiling zone being connected with the separator through a pipe to transport the dispersion medium solution and a pipe to transport the vaporized solvent to form a circuit, and a pump provided in the circuit. In the apparatus since the dispersion medium is removed in the boiling solvent, keeping a constant temperature is easy. The dispersion medium is promptly removed by contacting it with a solution of which the concentration of the dispersion medium is always low due to continuous removal of the dispersion medium in the separator. Since the boiling point of the solvent is about 20.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: May 12, 1992
    Assignee: NKK Corporation
    Inventor: Hiroaki Nishio
  • Patent number: 5091222
    Abstract: A method for forming a ceramic film comprises the steps of boiling a solution containing ceramics, dipping a base material into the solution, taking the base material out of the solution and drying the base material taken out of the solution in the presence of vapor of said boiling solution. The solution is a solution, in which ceramics is dispersed or dissolved. The solution is a solution, in which a precursor of ceramics is dispersed or dissolved.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: February 25, 1992
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Michitaka Sato, Keiji Watanabe
  • Patent number: 5080841
    Abstract: In a hot isostatic pressing (HIP) method, only the probe of a dilatometer is set in the pressurized heating space of the HIP apparatus, and the probe is attached to a test piece having a greater specific surface area made of the same material as the body to be treated. The test piece is treated by HIP together with the body to be treated, and the beginning of the contraction of the test piece is detected by the dilatometer. Then, the body is densified by keeping the pressure and the temperature not lower than those at the beginning of contraction of the test piece. According to the method of the invention, since suitable HIP treating conditions are determined immediately, each body to be treated can be treated by only one HIP suitably without repeating the troublesome HIP process. Also, since the body can be treated by HIP without elevating the temperature beyond the necessary temperature, the crystal grain growth of the body to be treated can be inhibited.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: January 14, 1992
    Assignee: NKK Corporation
    Inventor: Hiroaki Nishio
  • Patent number: 5073330
    Abstract: A method of molding polysilazane which includes heating a liquid sheet composed of liquid polysilazane alone or containing not more than 30 wt. % of a ceramic powder or a ceramic precursor to form a highly viscous sheet having a viscosity coefficient of 10.sup.4 to 10.sup.6 poise, fitting the highly viscous sheet to a forming mold, and heating to set the sheet. According to the method of the invention, molded bodies are easily obtained which have relatively uniform thickness, and are excellent in transferability, homogeneous and show less defects.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: December 17, 1991
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Keiji Watanabe, Michitaka Sato
  • Patent number: 5066438
    Abstract: A method of producing a silicon nitride sintered body which comprises using an amorphous Si.sub.3 N.sub.4 powder having a mean particle size of 5 to 50 nm, a nitrogen content of 30 to 39 wt. %, an oxygen content of 1 to 10 wt. %, the sum of the nitrogen content and the oxygen content being 38 to 42 wt. % and an unavoidable impurities content of less than 500 ppm as the raw material to form a molded body, sealing the molded body in a capsule and treating it with HIP in the range of 1000.degree. to 1800.degree. C. and 1000 to 2000 atm until the density becomes 3.1 to 3.4 g/cm.sup.3. In the method of the invention, active surface energy of silicon nitride powder is utilized as the driving force for sintering due to using a super fine powder. The super fine powder improves sintering ability by uniform mixing. The sintering ability is further improved by substituting a suitable amount of the nitrogen in the silicon nitride with oxygen.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: November 19, 1991
    Assignee: NKK Corporation
    Inventors: Michitaka Sato, Hiroaki Nishio
  • Patent number: 5035847
    Abstract: A mold for slip casting comprising a compact formed out of a mixture having an organic matter and powders, the organic matter being capable of being extracted by supercritical fluid and the powders being incapable of being extracted by the supercritical fluid, and furthermore, a method for slip casting comprising a compact formed out of an organic matter capable of being extracted by supercritical fluid and having a melting point of 0.degree. to 150.degree. C. The organic matter is any one selected from the group of methyl carbonate, t-butyle alcohol, stearic acid stearyl alcohol and paraffin.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: July 30, 1991
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Hiroaki Nishio, Takeshi Kawashima
  • Patent number: 5030401
    Abstract: A method for molding powders to form a shaped compact comprising the steps offorming a thin-wall resilient mold having an outer surface and having at least one opening adjacent a surface of a model of a desired shape, forming a mold support on the outer surface of the thin-wall resilient mold, so that the mold support adheres to the outer surface of the thin-walled resilient mold,removing the model from the thin-wall resilient mold whereby a cavity is formed in a portion of the thin-wall resilient mold, from which the model is removed, filling up the cavity of the thin-wall resilient mold with a powder as a forming material through the opening,sealing the opening of the thin-wall resilient mold after having evacuated air from the inside of the thin-wall resilient mold,removing the mold support from the thin-wall resilient mold,subjecting the thin-wall resilient mold filled with the powder to a cold isostatic press.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: July 9, 1991
    Assignee: NKK Corporation
    Inventors: Hiroaki Nishio, Hideharu Yamamoto, Jun Harada, Takeshi Kawashima