Patents by Inventor Masanobu Yamagata
Masanobu Yamagata 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: 10496221Abstract: A position detection device for detecting positions of a non-emitter and an emitter in a detection area includes one or more reflective members disposed around the detection area, illumination light sources to emit light toward the reflective member, light receiving sensors to receive light from the reflective member and light from the light emitter, and a control device to control the illumination light sources and the light emitter. Based on previous detection statuses of the non-light emitter and the light emitter, the control device sets a time ratio of a time of a non-light emitter detection mode to a time of a light emitter detection mode, and sets timings of the non-light emitter detection mode and the light emitter detection mode.Type: GrantFiled: May 30, 2018Date of Patent: December 3, 2019Assignee: RICOH COMPANY, LTD.Inventors: Yoshiaki Oshima, Noritada Ohi, Katsuyuki Omura, Masafumi Nagao, Naoyuki Ishikawa, Seiko Yamamoto, Masanobu Yamagata
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Patent number: 10180759Abstract: A coordinate detecting apparatus includes: a plurality of light-emitting and -receiving units arranged along an outer edge of the coordinate input area, the plurality of light-emitting and -receiving units each including a light-emitting part and a light-receiving part; at least one retroreflective member arranged along the outer edge of the coordinate input area; and a control unit to control the plurality of light-emitting and -receiving units to detect coordinates of a position of input made with a designation input unit in a first detection state or a second detection state.Type: GrantFiled: December 14, 2016Date of Patent: January 15, 2019Assignee: Ricoh Company, Ltd.Inventors: Seiko Yamamoto, Katsuyuki Omura, Noritada Ohi, Yoshiaki Oshima, Masafumi Nagao, Naoyuki Ishikawa, Masanobu Yamagata
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Publication number: 20180275819Abstract: A position detection device for detecting positions of a non-emitter and an emitter in a detection area includes one or more reflective members disposed around the detection area, illumination light sources to emit light toward the reflective member, light receiving sensors to receive light from the reflective member and light from the light emitter, and a control device to control the illumination light sources and the light emitter. Based on previous detection statuses of the non-light emitter and the light emitter, the control device sets a time ratio of a time of a non-light emitter detection mode to a time of a light emitter detection mode, and sets timings of the non-light emitter detection mode and the light emitter detection mode.Type: ApplicationFiled: May 30, 2018Publication date: September 27, 2018Inventors: Yoshiaki OSHIMA, Noritada OHI, Katsuyuki OMURA, Masafumi NAGAO, Naoyuki ISHIKAWA, Seiko YAMAMOTO, Masanobu YAMAGATA
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Publication number: 20180039344Abstract: A coordinate detection apparatus for detecting coordinates of a light-emitting pointer and a non-light-emitting pointer on a display surface, includes an imaging unit configured to capture an image of at least one of the light-emitting pointer and the non-light-emitting pointer in a predetermined range from the display surface; and a detection unit configured to detect a quantity of light generated by the light-emitting pointer emitting light in the predetermined range so as to detect the coordinates of the light-emitting pointer, and to detect a quantity of light emitted on the display surface and cut off by the non-light-emitting pointer in the predetermined range so as to detect the coordinates of the non-light-emitting pointer.Type: ApplicationFiled: October 18, 2017Publication date: February 8, 2018Inventors: Seiko YAMAMOTO, Masanobu YAMAGATA, Naoyuki ISHIKAWA
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Publication number: 20170177164Abstract: A coordinate detecting apparatus includes: a plurality of light-emitting and -receiving units arranged along an outer edge of the coordinate input area, the plurality of light-emitting and -receiving units each including a light-emitting part and a light-receiving part; at least one retroreflective member arranged along the outer edge of the coordinate input area; and a control unit to control the plurality of light-emitting and -receiving units to detect coordinates of a position of input made with a designation input unit in a first detection state or a second detection state.Type: ApplicationFiled: December 14, 2016Publication date: June 22, 2017Inventors: Seiko YAMAMOTO, Katsuyuki OMURA, Noritada OHI, Yoshiaki OSHIMA, Masafumi NAGAO, Naoyuki ISHIKAWA, Masanobu YAMAGATA
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Patent number: 9063487Abstract: A fixing device includes a rotatable fixing member, a pressing member, and an induction heater. The induction heater includes an excitation coil, ferromagnetic cores, and a holder. The ferromagnetic cores include multiple arch cores and multiple side cores. The multiple arch cores are disposed facing an outer surface of a heat generation layer with the excitation coil interposed therebetween. The multiple side cores are disposed outside the excitation coil in a longitudinal direction of the induction heater so as to face both ends of each of the multiple arch cores. The multiple side cores are integrally inserted in the holder. The holder includes a spacer. The spacer contains a resin material used in the holder and provided in a close-facing portion located between at least one of the multiple arch cores and at least one of the multiple side cores to form a gap.Type: GrantFiled: January 30, 2014Date of Patent: June 23, 2015Assignee: Ricoh Company, Ltd.Inventors: Yukari Isoe, Motokazu Hasegawa, Masanobu Yamagata
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Patent number: 9033335Abstract: An image forming apparatus includes a sheet feeding device (1). The sheet feeding device (1) includes a sheet feeding cassette (2), a push-up member (4), a drive shaft (5), and a rotation detecting device (6). The rotation detecting device (6) includes an output gear connected to the drive shaft (5). The output gear includes a gear main body provided with a gear tooth on its outer edge; and an electrode holding member that is attached to the gear main body. The electrode holding member is rotatably provided in the case (9) and a rotating electrode is attached to the electrode holding member. The electrode holding member is formed of at least one thermoplastic resin selected from the group consisting of POM, PA, PBT, PP, PE, ABS resin, PS, PPE, PC, and PMMA. The gear main body is formed of a material whose strength is higher than thermoplastic resin of which the electrode holding member is formed.Type: GrantFiled: January 18, 2011Date of Patent: May 19, 2015Assignee: RICOH COMPANY, LTD.Inventors: Yasutomo Ide, Masanobu Yamagata, Shinichi Kato, Yasuhiro Kuba, Tsuyoshi Hashiyada
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Patent number: 8983348Abstract: A fixing device that includes a rotary fixing member; a pressure roller configured to press against the fixing member to form a nip with the fixing member; and an induction heating unit as a heat source to heat the fixing member. The induction heating unit includes an excitation coil; a coil retainer to hold the excitation coil; and a cover member disposed opposite the coil retainer in an opposite side of the rotary fixing member, in which the cover member protrudes toward a central predetermined range of the excitation coil in an axial direction of the rotary fixing member to effectively cool the fixing device. The induction heating unit further includes a rectifying member to effectively cool the fixing device.Type: GrantFiled: January 22, 2014Date of Patent: March 17, 2015Assignee: Ricoh Company, Ltd.Inventors: Shota Kobashigawa, Susumu Matsusaka, Miwa Shuto, Masanobu Yamagata, Motokazu Hasegawa, Yukari Isoe
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Publication number: 20140233994Abstract: A fixing device includes a rotatable fixing member, a pressing member, and an induction heater. The induction heater includes an excitation coil, ferromagnetic cores, and a holder. The ferromagnetic cores include multiple arch cores and multiple side cores. The multiple arch cores are disposed facing an outer surface of a heat generation layer with the excitation coil interposed therebetween. The multiple side cores are disposed outside the excitation coil in a longitudinal direction of the induction heater so as to face both ends of each of the multiple arch cores. The multiple side cores are integrally inserted in the holder. The holder includes a spacer. The spacer contains a resin material used in the holder and provided in a close-facing portion located between at least one of the multiple arch cores and at least one of the multiple side cores to form a gap.Type: ApplicationFiled: January 30, 2014Publication date: August 21, 2014Inventors: Yukari ISOE, Motokazu HASEGAWA, Masanobu YAMAGATA
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Publication number: 20140205331Abstract: A fixing device that includes a rotary fixing member; a pressure roller configured to press against the fixing member to form a nip with the fixing member; and an induction heating unit as a heat source to heat the fixing member. The induction heating unit includes an excitation coil; a coil retainer to hold the excitation coil; and a cover member disposed opposite the coil retainer in an opposite side of the rotary fixing member, in which the cover member protrudes toward a central predetermined range of the excitation coil in an axial direction of the rotary fixing member to effectively cool the fixing device. The induction heating unit further includes a rectifying member to effectively cool the fixing device.Type: ApplicationFiled: January 22, 2014Publication date: July 24, 2014Inventors: Shota KOBASHIGAWA, Susumu MATSUSAKA, Miwa SHUTO, Masanobu YAMAGATA, Motokazu HASEGAWA, Yukari ISOE
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Patent number: 8348258Abstract: A driving force transmitting device comprising: an output shaft which can output a rotating force, and a casing which supports the output shaft so that a leading tip part of the output shaft can expose the outside, wherein the output shaft is provided on the casing so that the tip end surface thereof is flash with or substantially flash with an outer surface of the casing or the tip end surface thereof is recessed interior of the outer surface, and wherein the tip end surface thereof is provided with an engaging part which is insertable/removable to/from an engaged part provided on a driven member.Type: GrantFiled: August 26, 2010Date of Patent: January 8, 2013Assignee: Ricoh Company, Ltd.Inventors: Shinichi Kato, Masanobu Yamagata, Katsuhiko Hanagaki, Toshio Yanata, Tsuyoshi Hashiyada, Toshiki Yokoyama
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Patent number: 8191891Abstract: To provide a paper feeding device that can stably feed a recording media of an angle bottomed envelope or the like with a non-uniform thickness in which defects such as feeding failure, oblique feeding, dog ears and paper jamming or the like are not generated, a paper feeding device of the present invention includes a bottom plate 41 that sends up a recording media stacked thereon to a paper feeding position, a feeding device 24 that feeds an uppermost piece of the recording media sent up to the paper feeding position in which an auxiliary member 50 with a curved surface is disposed at least within a width directional area occupied by the paper feeding device 24 and atop an upper surface of the bottom plate 41, a height from each point of the curved surface of the auxiliary member 50 to the bottom plate 41 is non-uniform.Type: GrantFiled: June 26, 2009Date of Patent: June 5, 2012Assignee: Ricoh CompanyInventor: Masanobu Yamagata
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Patent number: 8121502Abstract: An image forming apparatus for forming an image includes a first control table and a second control table. The first control table includes information on widths of a recording sheet, categorized into a plurality of groups of different widths thereof in a direction perpendicular to a sheet transport direction. The second control table includes information on timing of the recording sheet transported to the fixing device based on the group to which a preceding recording sheet, belongs and the group to which a subsequent recording sheet belongs. When a certain width of the recording sheet belongs to the plurality of the groups in the first control table, the group to which the preceding recording sheet belongs is the group to which the subsequent recording sheet belongs.Type: GrantFiled: April 1, 2009Date of Patent: February 21, 2012Assignee: Ricoh Company, Ltd.Inventor: Masanobu Yamagata
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Publication number: 20110176819Abstract: An image forming apparatus includes a sheet feeding device (1). The sheet feeding device (1) includes a sheet feeding cassette (2), a push-up member (4), a drive shaft (5), and a rotation detecting device (6). The rotation detecting device (6) includes an output gear connected to the drive shaft (5). The output gear includes a gear main body provided with a gear tooth on its outer edge; and an electrode holding member that is attached to the gear main body. The electrode holding member is rotatably provided in the case (9) and a rotating electrode is attached to the electrode holding member. The electrode holding member is formed of at least one thermoplastic resin selected from the group consisting of POM, PA, PBT, PP, PE, ABS resin, PS, PPE, PC, and PMMA. The gear main body is formed of a material whose strength is higher than thermoplastic resin of which the electrode holding member is formed.Type: ApplicationFiled: January 18, 2011Publication date: July 21, 2011Applicant: RICOH COMPANY, LTD.Inventors: Yasutomo IDE, Masanobu Yamagata, Shinichi Kato, Yasuhiro Kuba, Tsuyoshi Hashiyada
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Publication number: 20110049789Abstract: A driving force transmitting device comprising: an output shaft which can output a rotating force, and a casing which supports the output shaft so that a leading tip part of the output shaft can expose the outside, wherein the output shaft is provided on the casing so that the tip end surface thereof is flash with or substantially flash with an outer surface of the casing or the tip end surface thereof is recessed interior of the outer surface, and wherein the tip end surface thereof is provided with an engaging part which is insertable/removable to/from an engaged part provided on a driven member.Type: ApplicationFiled: August 26, 2010Publication date: March 3, 2011Applicant: RICOH COMPANY, LTD.Inventors: Shinichi KATO, Masanobu Yamagata, Katsuhiko Hanagaki, Toshio Yanata, Tsuyoshi Hashiyada, Toshiki Yokoyama
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Patent number: 7838815Abstract: A rotary encoder capable of detecting a rotational movement of a rotator with high accuracy, and an apparatus and system for detecting the rotational movement of the rotator using the rotary encoder.Type: GrantFiled: April 21, 2006Date of Patent: November 23, 2010Assignee: Ricoh Company, Ltd.Inventor: Masanobu Yamagata
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Publication number: 20100001457Abstract: To provide a paper feeding device that can stably feed a recording media of an angle bottomed envelope or the like with a non-uniform thickness in which defects such as feeding failure, oblique feeding, dog ears and paper jamming or the like are not generated, a paper feeding device of the present invention includes a bottom plate 41 that sends up a recording media stacked thereon to a paper feeding position, a feeding device 24 that feeds an uppermost piece of the recording media sent up to the paper feeding position in which an auxiliary member 50 with a curved surface is disposed at least within a width directional area occupied by the paper feeding device 24 and atop an upper surface of the bottom plate 41, a height from each point of the curved surface of the auxiliary member 50 to the bottom plate 41 is non-uniform.Type: ApplicationFiled: June 26, 2009Publication date: January 7, 2010Inventor: Masanobu Yamagata
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Publication number: 20090252519Abstract: An image forming apparatus for forming an image includes a first control table and a second control table. The first control table includes information on widths of a recording sheet, categorized into a plurality of groups of different widths thereof in a direction perpendicular to a sheet transport direction. The second control table includes information on timing of the recording sheet transported to the fixing device based on the group to which a preceding recording sheet, belongs and the group to which a subsequent recording sheet belongs. When a certain width of the recording sheet belongs to the plurality of the groups in the first control table, the group to which the preceding recording sheet belongs is the group to which the subsequent recording sheet belongs.Type: ApplicationFiled: April 1, 2009Publication date: October 8, 2009Inventor: Masanobu Yamagata
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Publication number: 20060250292Abstract: A rotary encoder capable of detecting a rotational movement of a rotator with high accuracy, and an apparatus and system for detecting the rotational movement of the rotator using the rotary encoder.Type: ApplicationFiled: April 21, 2006Publication date: November 9, 2006Inventor: Masanobu Yamagata
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Publication number: 20060187493Abstract: An image scanning apparatus scans an image formed on a surface of a document. The image scanning apparatus includes a contact glass, a plurality of moving members including a light source and a plurality of reflection mirrors, an imaging lens, and an image pickup device. The contact glass holds the document thereon. The plurality of moving members are provided below the contact glass and move in a sub-scanning direction. The light source outputs light for illuminating the surface of the document. The plurality of reflection mirrors sequentially reflect the light reflected obliquely from the surface of the document. The imaging lens collects the reflected light. The image pickup device forms thereon an image from the light output from the imaging lens.Type: ApplicationFiled: February 21, 2006Publication date: August 24, 2006Inventor: Masanobu Yamagata