Patents by Inventor Atsuyoshi Nakayama
Atsuyoshi Nakayama 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: 11092046Abstract: A first rotator (6) includes an internal gear (14) and rotates in conjunction with a crankshaft (4). A second rotator (12) includes an output gear (121) and rotates in conjunction with a camshaft (3). A planetary rotator (13) includes a planetary gear (131) that meshes with the internal gear (14) and the output gear (121), and the planetary gear (131) meshes with the internal gear (14) and the output gear (121) to perform planetary motion, thereby changing the relative rotational position between the first rotator (6) and the second rotator (12). An input shaft (16) causes the planetary rotator (13) to perform planetary motion. A first bearing (18) is interposed between the input shaft (16) and the first rotator (6). A planetary bearing (17) is interposed between the input shaft (16) and the planetary rotator (13), and is included on the same plane orthogonal to the rotation axis (O) as the first bearing (18).Type: GrantFiled: March 30, 2018Date of Patent: August 17, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Atsuyoshi Nakayama, Masayuki Yokoyama
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Publication number: 20200408116Abstract: A first rotator (6) includes an internal gear (14) and rotates in conjunction with a crankshaft (4). A second rotator (12) includes an output gear (121) and rotates in conjunction with a camshaft (3). A planetary rotator (13) includes a planetary gear (131) that meshes with the internal gear (14) and the output gear (121), and the planetary gear (131) meshes with the internal gear (14) and the output gear (121) to perform planetary motion, thereby changing the relative rotational position between the first rotator (6) and the second rotator (12). An input shaft (16) causes the planetary rotator (13) to perform planetary motion. A first bearing (18) is interposed between the input shaft (16) and the first rotator (6). A planetary bearing (17) is interposed between the input shaft (16) and the planetary rotator (13), and is included on the same plane orthogonal to the rotation axis (O) as the first bearing (18).Type: ApplicationFiled: March 30, 2018Publication date: December 31, 2020Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Atsuyoshi NAKAYAMA, Masayuki YOKOYAMA
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Patent number: 9238713Abstract: Disclosed is a 2-pyrrolidone polymer or copolymer having optionally substituted methylol groups, and a process for producing the 2-pyrrolidone polymer or copolymer having methylol groups, the process comprising reacting a 2-pyrrolidone polymer or copolymer with an aldehyde.Type: GrantFiled: May 22, 2012Date of Patent: January 19, 2016Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norioki Kawasaki, Atsuyoshi Nakayama, Naoko Yamano
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Publication number: 20140275439Abstract: Disclosed is a biodegradable polymer comprising an optionally substituted aliphatic hydrocarbon group having 5 or more carbon atoms at at least one terminal of the polymer chain, wherein the biodegradable polymer has a weight-average molecular weight of not less than 35,000 when the biodegradable polymer has a 2-pyrrolidone polymer or copolymer as its main chain and stearic acid at the terminal of the polymer chain; a molded article comprising the biodegradable polymer; and a method for controlling biodegradability of a biodegradable polymer, comprising introducing an optionally substituted aliphatic hydrocarbon group into the terminal of the polymer chain of the biodegradable polymer.Type: ApplicationFiled: August 29, 2012Publication date: September 18, 2014Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Naoko Yamano, Norioki Kawasaki, Atsuyoshi Nakayama
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Publication number: 20140114045Abstract: Disclosed is a 2-pyrrolidone polymer or copolymer having optionally substituted methylol groups, and a process for producing the 2-pyrrolidone polymer or copolymer having methylol groups, the process comprising reacting a 2-pyrrolidone polymer or copolymer with an aldehyde.Type: ApplicationFiled: May 22, 2012Publication date: April 24, 2014Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norioki Kawasaki, Atsuyoshi Nakayama, Naoko Yamano
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Patent number: 8706015Abstract: An image forming apparatus includes photoreceptor drums, a charger, an exposure unit, a developing unit, an intermediate transfer belt and a fixing unit for fixing a toner image to a recording medium. The fixing unit includes a fixing part and a pressing part. The fixing part has a fixing roller, a heating member and a fixing belt. The pressing part has a pressing roller. The heating member is arranged close to, and so as to cover, the outer peripheral side of the fixing roller, and formed with an opening. Both edges of the opening extending along the axial direction of the fixing roller, are positioned closer to the pressing part side than the center axis of the fixing roller is.Type: GrantFiled: October 12, 2011Date of Patent: April 22, 2014Assignee: Sharp Kabushiki KaishaInventors: Atsuyoshi Nakayama, Akihiko Taniguchi
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Patent number: 8331821Abstract: A fixing device which can prevent deterioration and breakage of each member, and an image forming apparatus having the fixing device are provided. A separation/contact mechanism carries out separation/contact operation of an external heating section with respect to a fixing roller by turning the whole external heating section using a central axis of a rotation supporting roller out of a pair of rotation supporting rollers, as a rotation axis. This constitution can decrease impact force generated at the time of pressure-contact, and can prevent deterioration and breakage of the external heating belt and the fixing roller. Furthermore, when a heater lamp is provided in only the rotation supporting roller, positional deviation and damage of the heater lamp can be prevented.Type: GrantFiled: January 5, 2010Date of Patent: December 11, 2012Assignee: Sharp Kabushiki KaishaInventor: Atsuyoshi Nakayama
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Patent number: 8233831Abstract: In a fixing device including a fixing roller, a pressure roller and an external heating section, a scraper is arranged to contact a circumferential surface of an external heating belt and scrape toner and the like on the circumferential surface to thereby clean the circumferential surface. In addition, a material that has higher adherence to toner than on a circumferential surface of the fixing roller is used for the external hating belt to thereby peel the toner and the like on the circumferential surface of the fixing roller and clean the circumferential surface of the fixing roller. Further, as a vibration applying section adapted to apply vibration to the scraper, a first contact/separation section adapted to contact/separate the external heating section with/from the fixing roller is provided. Vibration is applied to the scraper by the first contact/separation to peel the toner and the like off the scraper.Type: GrantFiled: June 10, 2009Date of Patent: July 31, 2012Assignee: Sharp Kabushiki KaishaInventors: Atsuyoshi Nakayama, Toshiaki Kagawa
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Publication number: 20120121302Abstract: An image forming apparatus includes photoreceptor drums, a charger, an exposure unit, a developing unit, an intermediate transfer belt and a fixing unit for fixing a toner image to a recording medium. The fixing unit includes a fixing part and a pressing part. The fixing part has a fixing roller, a heating member and a fixing belt. The pressing part has a pressing roller. The heating member is arranged close to, and so as to cover, the outer peripheral side of the fixing roller, and formed with an opening. Both edges of the opening extending along the axial direction of the fixing roller, are positioned closer to the pressing part side than the center axis of the fixing roller is.Type: ApplicationFiled: October 12, 2011Publication date: May 17, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Atsuyoshi NAKAYAMA, Akihiko TANIGUCHI
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Patent number: 8027608Abstract: A fixing device which can reduce an overshoot of the surface temperature of a main heating section without lengthening a warming-up period of time, an image forming apparatus equipped therewith, and a recording medium on which is recorded the temperature control program are provided. In a standby mode, control is performed to stop an operation of a halogen lamp which is an internal heat source, when a surface temperature of a heating roller reaches a certain temperature lower than a target temperature, or when the operating period of time of the halogen lamp reaches a certain period of time. By so doing, as the heating roller ceases to be heated at a point at which it reaches a temperature lower than the target temperature, it is possible to reduce the overshoot of the surface temperature of the heating roller.Type: GrantFiled: August 25, 2009Date of Patent: September 27, 2011Assignee: Sharp Kabushiki KaishaInventors: Takashi Mukai, Toshiaki Kagawa, Atsuyoshi Nakayama
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Publication number: 20100172669Abstract: A fixing device which can prevent deterioration and breakage of each member, and an image forming apparatus having the fixing device are provided. A separation/contact mechanism carries out separation/contact operation of an external heating section with respect to a fixing roller by turning the whole external heating section using a central axis of a rotation supporting roller out of a pair of rotation supporting rollers, as a rotation axis. This constitution can decrease impact force generated at the time of pressure-contact, and can prevent deterioration and breakage of the external heating belt and the fixing roller. Furthermore, when a heater lamp is provided in only the rotation supporting roller, positional deviation and damage of the heater lamp can be prevented.Type: ApplicationFiled: January 5, 2010Publication date: July 8, 2010Inventor: Atsuyoshi Nakayama
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Publication number: 20100054788Abstract: A fixing device which can reduce an overshoot of the surface temperature of a main heating section without lengthening a warming-up period of time, an image forming apparatus equipped therewith, and a recording medium on which is recorded the temperature control program are provided. In a standby mode, control is performed to stop an operation of a halogen lamp which is an internal heat source, when a surface temperature of a heating roller reaches a certain temperature lower than a target temperature, or when the operating period of time of the halogen lamp reaches a certain period of time. By so doing, as the heating roller ceases to be heated at a point at which it reaches a temperature lower than the target temperature, it is possible to reduce the overshoot of the surface temperature of the heating roller.Type: ApplicationFiled: August 25, 2009Publication date: March 4, 2010Inventors: Takashi MUKAI, Toshiaki Kagawa, Atsuyoshi Nakayama
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Publication number: 20090311015Abstract: In a fixing device including a fixing roller, a pressure roller and an external heating section, a scraper is arranged to contact a circumferential surface of an external heating belt and scrape toner and the like on the circumferential surface to thereby clean the circumferential surface. In addition, a material that has higher adherence to toner than on a circumferential surface of the fixing roller is used for the external hating belt to thereby peel the toner and the like on the circumferential surface of the fixing roller and clean the circumferential surface of the fixing roller. Further, as a vibration applying section adapted to apply vibration to the scraper, a first contact/separation section adapted to contact/separate the external heating section with/from the fixing roller is provided. Vibration is applied to the scraper by the first contact/separation to peel the toner and the like off the scraper.Type: ApplicationFiled: June 10, 2009Publication date: December 17, 2009Inventors: Atsuyoshi NAKAYAMA, Toshiaki Kagawa