Patents by Inventor Takahiro Ishihara
Takahiro Ishihara 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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Publication number: 20160023025Abstract: The present invention provides a method for preventing and extinguishing fire, the method for preventing and extinguishing fire being effective against fire caused by a pyrophoric material and a water prohibitive substance. The method for preventing and extinguishing fire of the present invention is characterized in that a fire extinguishing foam composition is supplied to a flame caused by the combustion of a pyrophoric material and a water prohibitive substance whereby the flame is suppressed or extinguished, and that a combustible material is changed to an inert substance by a hydration reaction, the combustible material being a pyrophoric material or a water prohibitive substance.Type: ApplicationFiled: February 19, 2014Publication date: January 28, 2016Applicants: YAMATO PROTEC CORPORATION, NIPPON ALUMINUM ALKYLS, LTD.Inventors: Yasuyoshi Fukuda, Yuki Takatsuka, Takahiro Ishihara, Koki Fukumura, Seijiro Koga, Koji Miyashita
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Patent number: 9116470Abstract: An image forming apparatus configures a normal transfer potential in a yellow primary transfer unit, and configures a transfer potential which does not cause any retransfer phenomenon of a yellow measurement image in image carriers located on the downstream side of the yellow primary transfer unit. When a color difference obtained from a reference density and a density of a measurement image on an intermediate transfer belt becomes equal to or larger than a prescribed value, the image forming apparatus determines that multinary-color density adjustment is required.Type: GrantFiled: July 31, 2012Date of Patent: August 25, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Yasuhito Shirafuji, Tomohisa Itagaki, Nobuhiko Zaima, Takahiro Ishihara
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Patent number: 9091956Abstract: An image forming apparatus includes; an exposure unit configured to perform, based on the image data, first exposure for a photosensitive member and second exposure for the photosensitive member exposed by the first exposure; a determination unit configured to determine a type of the image to be formed based on image data; and a control unit configured to control the exposure unit such that a difference in an exposure amount between the first exposure and the second exposure performed based on the image data when the type of the image is a character is larger than the difference in the exposure amount between the first exposure and the second exposure performed based on the image data when the type of the image is a picture.Type: GrantFiled: August 26, 2014Date of Patent: July 28, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Nobuhiko Zaima, Tomohisa Itagaki, Takahiro Ishihara, Yasuhito Shirafuji
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Publication number: 20150168523Abstract: An MRI apparatus comprising, a generating unit configured to generate radio frequency pulses applied in a pulse sequence; a sequence control unit configured to apply a radio frequency pulse related to acquisition of an image signal and a corrective radio frequency pulse during execution of one TR of a pulse sequence; and a calculation unit configured to measure the corrective radio frequency pulse and calculates a correction value of the radio frequency pulse, wherein based on the correction value, the generating unit corrects a radio frequency pulse related to acquisition of an image signal to be applied during a following TR later than a TR during which the corrective radio frequency pulse is measured.Type: ApplicationFiled: December 10, 2014Publication date: June 18, 2015Inventors: Takahiro ISHIHARA, Masao YUI
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Publication number: 20150168515Abstract: According to one embodiment, a radio frequency coil unit includes cables, radio frequency coil elements and balun circuits. The cables correspond to channels. The radio frequency coil elements are directly or indirectly connected to the cables. The balun circuits suppress an influence of an unbalanced current flowing into partial radio frequency coil elements out of the radio frequency coil elements. A part of the cables pass through at least one of the balun circuits in contact with or in non-contact with at least one of the balun circuits.Type: ApplicationFiled: February 25, 2015Publication date: June 18, 2015Inventors: Takahiro ISHIHARA, Sadanori TOMIHA
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Patent number: 9057974Abstract: An image forming apparatus capable of suppressing density unevenness of a toner image formed on a photosensitive member. A light amount of a light beam that exposes an end portion of the photosensitive member is made different from a light amount of a light beam that exposes a central portion thereof in order to suppress a density difference between a toner image density at the central portion of the photosensitive member and that at the end portion thereof in a scanning direction of the light beams.Type: GrantFiled: July 12, 2013Date of Patent: June 16, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Takahiro Ishihara, Tomohisa Itagaki, Nobuhiko Zaima, Yasuhito Shirafuji
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Patent number: 8929757Abstract: An image forming apparatus includes an image forming unit having an exposure unit and a developing unit; a detection unit configured to detect a thickness and an area ratio of a toner layer of a pattern image formed by the image forming unit; a storage unit configured to store data indicating permissible ranges for the thickness and the area ratio of the toner layer; and a correction unit configured to change, when the thickness or the area ratio of the toner layer detected by the detection unit falls outside the corresponding permissible range indicated by the data stored in the storage unit, a spot diameter of the laser beam so that the thickness and the area ratio of the toner layer respectively fall within the permissible ranges.Type: GrantFiled: June 6, 2012Date of Patent: January 6, 2015Assignee: Canon Kabushiki KaishaInventors: Yasuhito Shirafuji, Tomohisa Itagaki, Nobuhiko Zaima, Takahiro Ishihara
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Publication number: 20140363183Abstract: An image forming apparatus includes; an exposure unit configured to perform, based on the image data, first exposure for a photosensitive member and second exposure for the photosensitive member exposed by the first exposure; a determination unit configured to determine a type of the image to be formed based on image data; and a control unit configured to control the exposure unit such that a difference in an exposure amount between the first exposure and the second exposure performed based on the image data when the type of the image is a character is larger than the difference in the exposure amount between the first exposure and the second exposure performed based on the image data when the type of the image is a picture.Type: ApplicationFiled: August 26, 2014Publication date: December 11, 2014Inventors: Nobuhiko Zaima, Tomohisa Itagaki, Takahiro Ishihara, Yasuhito Shirafuji
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Patent number: 8908225Abstract: An apparatus includes a forming unit; a reading unit; a conversion unit converting a signal corresponding to the image read by the reading unit into a signal indicating a density value; a correction unit performing tone correction on the density value of the signal output by the conversion unit; and a control unit controlling a tone correction setting in the tone correction unit by controlling the reading unit to read a tone correction image that was formed on a recording material by the forming unit. When controlling the tone correction setting, the control unit further changes a setting for image formation in the forming unit and a setting for conversion into a density value in the conversion unit according to the recording material used in the control of the tone correction setting.Type: GrantFiled: May 16, 2012Date of Patent: December 9, 2014Assignee: Canon Kabushiki KaishaInventors: Nobuhiko Zaima, Tomohisa Itagaki, Yasuhito Shirafuji, Takahiro Ishihara
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Patent number: 8854408Abstract: An image forming apparatus includes; an exposure unit configured to perform, based on the image data, first exposure for a photosensitive member and second exposure for the photosensitive member exposed by the first exposure; a determination unit configured to determine a type of the image to be formed based on image data; and a control unit configured to control the exposure unit such that a difference in an exposure amount between the first exposure and the second exposure performed based on the image data when the type of the image is a character is larger than the difference in the exposure amount between the first exposure and the second exposure performed based on the image data when the type of the image is a picture.Type: GrantFiled: January 31, 2013Date of Patent: October 7, 2014Inventors: Nobuhiko Zaima, Tomohisa Itagaki, Takahiro Ishihara, Yasuhito Shirafuji
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Patent number: 8678797Abstract: A stationary base plate includes a sub-bypass hole, which communicates between a suction chamber and a first compression chamber, and a main bypass hole, which communicates between the suction chamber and a second compression chamber. A rotational center of the orbiting scroll and the sub-bypass hole are located along a first imaginary line. The rotational center of the orbiting scroll is also located along a second imaginary line, which is perpendicular to the first imaginary line. The main bypass hole opens at a location of the stationary base plate, which is on a side of the second imaginary line where the sub-bypass hole is located, so that timing of communicating between the suction chamber and the first compression chamber with each other is deviated from timing of communicating between the suction chamber and the second compression chamber with each other.Type: GrantFiled: October 26, 2011Date of Patent: March 25, 2014Assignee: DENSO CORPORATIONInventors: Shigeru Kawano, Masami Sanuki, Takahiro Ishihara
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Patent number: 8666265Abstract: An image forming apparatus that is capable of reducing a sequential variation of graininess and keeping imaging quality. An exposure unit exposes the photoconductor to a light beam to form an electrostatic latent image. A development unit develops the electrostatic latent image with a toner. A change unit changes a height of toner image by changing an exposure spot area of the light beam on the photoconductor. A formation unit forms test patterns corresponding to different exposure spot areas on a recording sheet. A read unit reads the test patterns. A control unit detects graininess of each test pattern based on information about the test patterns read by the read unit, determines an exposure spot area where the graininess becomes good relatively, and controls the height of toner image on the photoconductor by setting the exposure spot area determined so as to be an exposure spot area for image formation.Type: GrantFiled: February 6, 2012Date of Patent: March 4, 2014Assignee: Canon Kabushiki KaishaInventors: Takahiro Ishihara, Tomohisa Itagaki, Nobuhiko Zaima, Yasuhito Shirafuji
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Publication number: 20140055140Abstract: A magnetic resonance imaging apparatus includes an imaging unit configured to carry out magnetic resonance imaging of a patient using a transmitting QD coil that allows at least one of phase and amplitude of a radio-frequency transmit pulse on at least one input channel of the transmitting QD coil to be adjusted independently of each other, and an adjustment unit arranged to adjust at least one of the phase and the amplitude of the radio-frequency transmit pulse according to imaging conditions.Type: ApplicationFiled: October 1, 2013Publication date: February 27, 2014Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Masaaki UMEDA, Takahiro ISHIHARA
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Publication number: 20140036020Abstract: An image forming apparatus capable of suppressing density unevenness of a toner image formed on a photosensitive member. A light amount of a light beam that exposes an end portion of the photosensitive member is made different from a light amount of a light beam that exposes a central portion thereof in order to suppress a density difference between a toner image density at the central portion of the photosensitive member and that at the end portion thereof in a scanning direction of the light beams.Type: ApplicationFiled: July 12, 2013Publication date: February 6, 2014Inventors: Takahiro ISHIHARA, Tomohisa ITAGAKI, Nobuhiko ZAIMA, Yasuhito SHIRAFUJI
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Patent number: 8643364Abstract: A magnetic resonance imaging apparatus according to an embodiment includes an imaging unit configured to carry out magnetic resonance imaging of a patient using a transmitting QD coil which allows at least one of phase and amplitude of a radio-frequency transmit pulse on at least one input channel of the transmitting QD coil to be adjusted independently of each other, and an adjustment unit configured to adjust at least one of the phase and the amplitude of the radio-frequency transmit pulse according to imaging conditions.Type: GrantFiled: November 24, 2010Date of Patent: February 4, 2014Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Masaaki Umeda, Takahiro Ishihara
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Publication number: 20130034359Abstract: An image forming apparatus configures a normal transfer potential in a yellow primary transfer unit, and configures a transfer potential which does not cause any retransfer phenomenon of a yellow measurement image in image carriers located on the downstream side of the yellow primary transfer unit. When a color difference obtained from a reference density and a density of a measurement image on an intermediate transfer belt becomes equal to or larger than a prescribed value, the image forming apparatus determines that multinary-color density adjustment is required.Type: ApplicationFiled: July 31, 2012Publication date: February 7, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Yasuhito SHIRAFUJI, Tomohisa ITAGAKI, Nobuhiko ZAIMA, Takahiro ISHIHARA
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Publication number: 20120321331Abstract: An image forming apparatus includes an image forming unit having an exposure unit and a developing unit; a detection unit configured to detect a thickness and an area ratio of a toner layer of a pattern image formed by the image forming unit; a storage unit configured to store data indicating permissible ranges for the thickness and the area ratio of the toner layer; and a correction unit configured to change, when the thickness or the area ratio of the toner layer detected by the detection unit falls outside the corresponding permissible range indicated by the data stored in the storage unit, a spot diameter of the laser beam so that the thickness and the area ratio of the toner layer respectively fall within the permissible ranges.Type: ApplicationFiled: June 6, 2012Publication date: December 20, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Yasuhito Shirafuji, Tomohisa Itagaki, Nobuhiko Zaima, Takahiro Ishihara
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Publication number: 20120314227Abstract: An apparatus includes a forming unit; a reading unit; a conversion unit converting a signal corresponding to the image read by the reading unit into a signal indicating a density value; a correction unit performing tone correction on the density value of the signal output by the conversion unit; and a control unit controlling a tone correction setting in the tone correction unit by controlling the reading unit to read a tone correction image that was formed on a recording material by the forming unit. When controlling the tone correction setting, the control unit further changes a setting for image formation in the forming unit and a setting for conversion into a density value in the conversion unit according to the recording material used in the control of the tone correction setting.Type: ApplicationFiled: May 16, 2012Publication date: December 13, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Nobuhiko Zaima, Tomohisa Itagaki, Yasuhito Shirafuji, Takahiro Ishihara
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Publication number: 20120294643Abstract: An image forming apparatus includes a conveyance unit to convey an image carrier and an image forming unit to form an image on the image carrier. The image forming apparatus also includes a first determining unit, a control unit, an irradiation unit, an output unit, and a second determining unit. The first determining unit determines a first image forming condition of the image forming unit for forming a heavy line image at a particular width and thickness. The control unit causes the image forming unit to form a first measurement image having a particular width and length. The irradiation unit emits light onto the image carrier. The output unit outputs a first signal corresponding to a thickness of the first measurement image by receiving reflected light. The second determining unit determines a second image forming condition for forming a fine line image at a particular width and thickness.Type: ApplicationFiled: February 17, 2012Publication date: November 22, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Tomohisa Itagaki, Nobuhiko Zaima, Yasuhito Shirafuji, Takahiro Ishihara
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Publication number: 20120201554Abstract: An image forming apparatus that is capable of reducing a sequential variation of graininess and keeping imaging quality. An exposure unit exposes the photoconductor to a light beam to form an electrostatic latent image. A development unit develops the electrostatic latent image with a toner. A change unit changes a height of toner image by changing an exposure spot area of the light beam on the photoconductor. A formation unit forms test patterns corresponding to different exposure spot areas on a recording sheet. A read unit reads the test patterns. A control unit detects graininess of each test pattern based on information about the test patterns read by the read unit, determines an exposure spot area where the graininess becomes good relatively, and controls the height of toner image on the photoconductor by setting the exposure spot area determined so as to be an exposure spot area for image formation.Type: ApplicationFiled: February 6, 2012Publication date: August 9, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Takahiro ISHIHARA, Tomohisa ITAGAKI, Nobuhiko ZAIMA, Yasuhito SHIRAFUJI