Patents by Inventor Kiyotaka Murakami
Kiyotaka Murakami 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: 20240113810Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.Type: ApplicationFiled: December 7, 2023Publication date: April 4, 2024Inventors: Yutaka MURAKAMI, Shutai OKAMURA, Kiyotaka KOBAYASHI, Masayuki ORIHASHI, Kazuaki TAKAHASHI
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Publication number: 20240103414Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.Type: ApplicationFiled: December 1, 2023Publication date: March 28, 2024Inventors: Kiyotaka MURAKAMI, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
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Publication number: 20240076153Abstract: According to one embodiment, a sheet conveyance device includes a plurality of conveyance rollers, a sheet sensor, and a control unit. The conveyance rollers convey a sheet on a conveyance path. The sheet sensor is provided at least at a first position and a second position on the conveyance path for the sheet and senses passage of a front end of the sheet and passage of a rear end of the sheet.Type: ApplicationFiled: September 7, 2022Publication date: March 7, 2024Inventor: Kiyotaka Murakami
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Patent number: 11868067Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.Type: GrantFiled: February 16, 2022Date of Patent: January 9, 2024Assignee: Toshiba Tec Kabushiki KaishaInventors: Kiyotaka Murakami, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
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Patent number: 11849922Abstract: The invention provides medical or industrial light source devices, for example, an endoscope. A light source device includes: a light source emitting a light beam; a concentrator including a pair of Fresnel lenses with corrugated surfaces and concentrating the emitted light beam, the corrugated surfaces of the Fresnel lenses facing each other, and a light guide guiding the concentrated light beam. The corrugated surfaces of the pair of Fresnel lenses may be in contact with each other and one end of the light guide may be disposed at a focal point of the concentrated light beam.Type: GrantFiled: September 4, 2020Date of Patent: December 26, 2023Assignees: ARS Co., Ltd., SBI Pharmaceuticals Co., Ltd.Inventors: Yoshihito Tanaka, Kiyotaka Murakami
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Publication number: 20230393501Abstract: An image processing apparatus includes a fixing unit including a belt, and a heater configured to heat the belt and including a substrate and a heating layer that is formed on the substrate, and a controller configured to shut off the heater if no current flows through the belt.Type: ApplicationFiled: August 21, 2023Publication date: December 7, 2023Inventors: Yohei DOI, Eiji SHINOHARA, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yuki KAWASHIMA, Kiyotaka MURAKAMI
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Patent number: 11774887Abstract: An image processing apparatus includes a fixing unit including a fixing belt, and a heater configured to heat the fixing belt and including a substrate and a heating layer that is formed on the substrate, and a controller configured to, upon detecting an absence of a current flowing through the fixing belt, control the heater to not generate heat.Type: GrantFiled: February 2, 2022Date of Patent: October 3, 2023Assignee: Toshiba Tec Kabushiki KaishaInventors: Yohei Doi, Eiji Shinohara, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yuki Kawashima, Kiyotaka Murakami
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Publication number: 20230259058Abstract: A heating device includes a rotatable film, a heater disposed inside the film and including a substrate that extends along a first direction and having two surfaces opposite to each other, and a heater element on one of the surfaces of the substrate, and a heat conductor including a first portion contacting the other surface of the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the other surface of the substrate. A width of the second portion is wider than the heater element in the second direction.Type: ApplicationFiled: April 27, 2023Publication date: August 17, 2023Inventors: Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kiyotaka MURAKAMI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
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Publication number: 20230190085Abstract: The invention provides medical or industrial light source devices, for example, an endoscope. A light source device includes: a light source emitting a light beam; a concentrator including a pair of Fresnel lenses with corrugated surfaces and concentrating the emitted light beam, the corrugated surfaces of the Fresnel lenses facing each other, and a light guide guiding the concentrated light beam. The corrugated surfaces of the pair of Fresnel lenses may be in contact with each other and one end of the light guide may be disposed at a focal point of the concentrated light beam.Type: ApplicationFiled: September 4, 2020Publication date: June 22, 2023Applicants: ARS Co., Ltd., SBI Pharmaceuticals Co., Ltd.Inventors: Yoshihito TANAKA, Kiyotaka MURAKAMI
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Patent number: 11669033Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction and having two surfaces opposite to each other, and a heater element on one of the surfaces of the substrate, and a heat conductor having first and second surfaces and including a first portion contacting the other surface of the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the other surface of the substrate. A thickness of the first portion of the heat conductor from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.Type: GrantFiled: March 16, 2022Date of Patent: June 6, 2023Assignee: Toshiba Tec Kabushiki KaishaInventors: Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kiyotaka Murakami, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
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Publication number: 20230021033Abstract: In an embodiment, an image forming apparatus includes an image forming unit to form a toner image on a sheet and a fixing device to heat the toner image. The fixing device includes a cylindrical belt, a heater within the interior region to heat a region of the belt. A first and a second heat conduction member are also within the interior region. The heater is between the first heat conduction member and the belt, and also between the second heat conduction member and the belt. The second heat conduction member has a recess facing the heater.Type: ApplicationFiled: September 20, 2022Publication date: January 19, 2023Inventor: Kiyotaka MURAKAMI
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Publication number: 20220206422Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction and having two surfaces opposite to each other, and a heater element on one of the surfaces of the substrate, and a heat conductor having first and second surfaces and including a first portion contacting the other surface of the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the other surface of the substrate. A thickness of the first portion of the heat conductor from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.Type: ApplicationFiled: March 16, 2022Publication date: June 30, 2022Inventors: Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kiyotaka MURAKAMI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
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Publication number: 20220171314Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.Type: ApplicationFiled: February 16, 2022Publication date: June 2, 2022Inventors: Kiyotaka MURAKAMI, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
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Publication number: 20220163910Abstract: In an embodiment, an image forming apparatus includes an image forming unit to form a toner image on a sheet and a fixing device to heat the toner image. The fixing device includes a cylindrical belt, a heater within the interior region to heat a region of the belt. A first and a second heat conduction member are also within the interior region. The heater is between the first heat conduction member and the belt, and also between the second heat conduction member and the belt. The second heat conduction member has a recess facing the heater.Type: ApplicationFiled: June 3, 2021Publication date: May 26, 2022Inventor: Kiyotaka MURAKAMI
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Publication number: 20220155710Abstract: An image processing apparatus includes a fixing unit including a fixing belt, and a heater configured to heat the fixing belt and including a substrate and a heating layer that is formed on the substrate, and a controller configured to, upon detecting an absence of a current flowing through the fixing belt, control the heater to not generate heat.Type: ApplicationFiled: February 2, 2022Publication date: May 19, 2022Inventors: Yohei DOI, Eiji SHINOHARA, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yuki KAWASHIMA, Kiyotaka MURAKAMI
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Patent number: 11307522Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction, and a heater element on the substrate and facing the film, a heat conductor having first and second surfaces and including a first portion contacting the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the substrate, and a temperature sensing element on the second surface at a position corresponding to the second portion. A thickness of the first portion from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.Type: GrantFiled: April 27, 2021Date of Patent: April 19, 2022Assignee: TOSHIBA TEC KABUSHIKI KAISHAInventors: Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kiyotaka Murakami, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
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Patent number: 11281132Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.Type: GrantFiled: July 6, 2020Date of Patent: March 22, 2022Assignee: TOSHIBA TEC KABUSHIKI KAISHAInventors: Kiyotaka Murakami, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
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Patent number: 11275330Abstract: An image processing apparatus includes a fixing unit including a heater and a fixing belt. The fixing belt is electrically connected between a first power source and a ground terminal. A controller is configured to control the heater to heat the fixing belt. The controller is further configured to determine whether a current is flowing through the fixing belt and, upon determining that a current is not flowing through the fixing belt, control the heater not to heat the fixing belt.Type: GrantFiled: March 22, 2021Date of Patent: March 15, 2022Assignee: TOSHIBA TEC KABUSHIKI KAISHAInventors: Yohei Doi, Eiji Shinohara, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yuki Kawashima, Kiyotaka Murakami
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Patent number: 11106164Abstract: A heating device includes a cylindrical film configured to be rotated about an axis, a heater including a substrate that extends along a longitudinal direction parallel to the axis, and a heater element on the substrate and facing an inner surface of the cylindrical film. A heat conductor extends along the longitudinal direction and has first and second surfaces. A first portion of the heat conductor contacts the substrate and a second portion of the heat conductor has a groove in the first surface. A temperature sensing element is disposed at a position on the second surface at a position opposite the groove.Type: GrantFiled: May 21, 2020Date of Patent: August 31, 2021Assignee: TOSHIBA TEC KABUSHIKI KAISHAInventors: Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kiyotaka Murakami, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
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Publication number: 20210247712Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction, and a heater element on the substrate and facing the film, a heat conductor having first and second surfaces and including a first portion contacting the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the substrate, and a temperature sensing element on the second surface at a position corresponding to the second portion. A thickness of the first portion from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.Type: ApplicationFiled: April 27, 2021Publication date: August 12, 2021Inventors: Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kiyotaka MURAKAMI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA