Patents by Inventor Takanori Sakurai

Takanori Sakurai 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: 10954088
    Abstract: Disclosed is a sheet conveying apparatus, including: a conveying member conveying a sheet; and a first and second changing portions s configured to change a conveying direction of the sheet conveyed by the conveying member by curving the sheet, wherein the conveying direction of the sheet being conveyed by the conveying member is changed by the first changing portion so that the sheet is conveyed toward the second changing portion. The relationship ?a>?b is satisfied where ?a indicates an angle in which a conveying direction of the sheet is changed by the first changing portion and ?b indicates an angle in which a conveying direction of the sheet is changed by the second changing portion.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: March 23, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takanori Sakurai, Hiroshi Kokubo
  • Patent number: 10895835
    Abstract: A fixing device includes a fixing rotator, a hollow pressure rotator, a heater, a holder, and a bearing. The pressure rotator is configured to contact the fixing rotator. The heater is disposed inside the pressure rotator. The holder is configured to hold the pressure rotator and the heater. The bearing is configured to rotatably support the pressure rotator. The holder includes a curved face contact portion having a curved face conforming to an outer circumferential surface of the bearing to contact the bearing. The bearing includes a flange. The flange is configured to divide the bearing into an inboard area and an outboard area in an axial direction of the pressure rotator. The inboard area and the outboard area are asymmetrical.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: January 19, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Atsushi Ashikagaya, Satoshi Takahashi, Takanori Sakurai, Shigeaki Gotoh
  • Publication number: 20200356034
    Abstract: A fixing device includes a fixing rotator, a hollow pressure rotator, a heater, a holder, and a bearing. The pressure rotator is configured to contact the fixing rotator. The heater is disposed inside the pressure rotator. The holder is configured to hold the pressure rotator and the heater. The bearing is configured to rotatably support the pressure rotator. The holder includes a curved face contact portion having a curved face conforming to an outer circumferential surface of the bearing to contact the bearing. The bearing includes a flange. The flange is configured to divide the bearing into an inboard area and an outboard area in an axial direction of the pressure rotator. The inboard area and the outboard area are asymmetrical.
    Type: Application
    Filed: April 23, 2020
    Publication date: November 12, 2020
    Inventors: Atsushi ASHIKAGAYA, Satoshi TAKAHASHI, Takanori SAKURAI, Shigeaki GOTOH
  • Publication number: 20200183311
    Abstract: A sheet conveyance apparatus includes a first conveyance portion configured to convey a sheet, a second conveyance portion configured to convey the sheet, the second conveyance portion including an abutment portion configured to form a loop on the sheet by being abutted against a leading edge of a sheet conveyed by the first conveyance portion, a curved guide portion, which is curved, configured to guide the sheet conveyed by the first conveyance portion to the second conveyance portion, and a rotary member arranged downstream of the first conveyance portion and upstream of the second conveyance portion in a sheet conveyance direction, and configured to be driven to rotate by a surface of the sheet that is guided by the curved guide portion, the surface sliding against the curved guide portion.
    Type: Application
    Filed: November 25, 2019
    Publication date: June 11, 2020
    Inventor: Takanori Sakurai
  • Publication number: 20180305152
    Abstract: Disclosed is a sheet conveying apparatus, including; a conveying member conveying a sheet; and a first and second changing portions s configured to change a conveying direction of the sheet conveyed by the conveying member by curving the sheet, wherein the conveying direction of the sheet being conveyed by the conveying member is changed by the first changing portion so that the sheet is convoyed toward the second changing portion. The relationship ?a>?b is satisfied where ?a indicates an angle in which a conveying direction of the sheet is changed by the first changing portion and ?b indicates an angle in which a conveying direction of the sheet is changed by the second changing portion.
    Type: Application
    Filed: April 17, 2018
    Publication date: October 25, 2018
    Inventors: Takanori Sakurai, Hiroshi Kokubo
  • Patent number: 9774760
    Abstract: An image reading device includes: an image reading unit configured to, in a process of reciprocating relative to a fixed document, read a document image using one or a plurality of reading colors, and when a plurality of reading colors are used, read the document image while successively switching the reading colors in a process of moving; a moving unit configured to move the image reading unit; a moving speed changing unit configured to change moving speeds of the image reading unit in an outgoing path and a return path based on a number “N” (where N is a positive integer) of the reading colors by the image reading unit; and a reading color number changing unit configured to change reading color numbers of the image reading unit in the outgoing path and the return path based on the number “N” of the reading colors.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: September 26, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Takanori Sakurai, Kenichi Satoh
  • Patent number: 9592992
    Abstract: An image forming apparatus includes an image forming portion forming an image on a sheet, a first sheet conveyance path guiding the sheet to the image forming portion, a second sheet conveyance path guiding the sheet on which an image has been formed by the image forming portion, and a re-conveyance path connecting the second sheet conveyance path and the first sheet conveyance path. The image forming apparatus further includes a connecting path connecting a point on the way of the second sheet conveyance path with a point on the way of the re-conveyance path and is configured to convey a sheet to the re-conveyance path through the connecting path.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: March 14, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kohei Mizuguchi, Takanori Sakurai
  • Publication number: 20160366303
    Abstract: An image reading device includes: an image reading unit configured to, in a process of reciprocating relative to a fixed document, read a document image using one or a plurality of reading colors, and when a plurality of reading colors are used, read the document image while successively switching the reading colors in a process of moving; a moving unit configured to move the image reading unit; a moving speed changing unit configured to change moving speeds of the image reading unit in an outgoing path and a return path based on a number “N” (where N is a positive integer) of the reading colors by the image reading unit; and a reading color number changing unit configured to change reading color numbers of the image reading unit in the outgoing path and the return path based on the number “N” of the reading colors.
    Type: Application
    Filed: May 17, 2016
    Publication date: December 15, 2016
    Inventors: Takanori Sakurai, Kenichi Satoh
  • Patent number: 9417607
    Abstract: An image forming apparatus includes a developing device; a temperature detecting unit measuring a temperature of a main body; a cooling unit cooling the inside of the image forming apparatus; and a controller controlling the cooling unit based on result of the temperature detecting unit. The controller increases an air flow rate of the cooling unit such that the air flow rate is higher than a predetermined rate if the result of the temperature detecting unit is higher than a first temperature during non image forming and the controller increases an air flow rate of the cooling unit such that the air flow rate is higher than the predetermined rate if the result of the temperature detecting unit is higher than a second temperature which is higher than the first temperature during an image forming operation.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: August 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takanori Sakurai
  • Patent number: 9411275
    Abstract: An image forming apparatus includes an image forming device configured to form, in a first position, a toner image on a sheet using toner containing a parting material; a fixing device configured to fix the toner image formed on the sheet by the image forming device in a second position, by heat and pressure; a fan configured to flow air along an air flow path between the image forming device and the fixing device; and a partition configured and positioned to substantially separate between the air flow path and a sheet feeding path from the first position to the second position.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: August 9, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Sugiyama, Koji Nojima, Takanori Sakurai
  • Publication number: 20160176677
    Abstract: An image forming apparatus includes an image forming portion forming an image on a sheet, a first sheet conveyance path guiding the sheet to the image forming portion, a second sheet conveyance path guiding the sheet on which an image has been formed by the image forming portion, and a re-conveyance path connecting the second sheet conveyance path and the first sheet conveyance path. The image forming apparatus further includes a connecting path connecting a point on the way of the second sheet conveyance path with a point on the way of the re-conveyance path and is configured to convey a sheet to the re-conveyance path through the connecting path.
    Type: Application
    Filed: December 11, 2015
    Publication date: June 23, 2016
    Inventors: Kouhei Mizuguchi, Takanori Sakurai
  • Publication number: 20150241841
    Abstract: An image forming apparatus, comprising: a developing device; a temperature detecting unit measuring a temperature of a main body; a cooling unit cooling the inside of the image forming apparatus; and a controller controlling the cooling unit based on result of the temperature detecting unit; wherein the controller increases an air flow rate of the cooling unit such that the air flow rate is higher than a predetermined rate if the result of the temperature detecting unit is higher than a first temperature during non image forming and the controller increases an air flow rate of the cooling unit such that the air flow rate is higher than the predetermined rate if the result of the temperature detecting unit is higher than a second temperature which is higher than the first temperature during an image forming operation.
    Type: Application
    Filed: January 29, 2015
    Publication date: August 27, 2015
    Inventor: Takanori SAKURAI
  • Publication number: 20140178091
    Abstract: An image forming apparatus includes an image forming device configured to form, in a first position, a toner image on a sheet using toner containing a parting material; a fixing device configured to fix the toner image formed on the sheet by the image forming device in a second position, by heat and pressure; a fan configured to flow air along an air flow path between the image forming device and the fixing device; and a partition configured and positioned to substantially separate between the air flow path and a sheet feeding path from the first position to the second position.
    Type: Application
    Filed: December 23, 2013
    Publication date: June 26, 2014
    Inventors: Shinichi Sugiyama, Koji Nojima, Takanori Sakurai
  • Patent number: 8729771
    Abstract: According to a composite substrate manufacturing method of the present invention, (a) a piezoelectric substrate having minute asperities formed in a rear surface thereof, and a support substrate having a smaller thermal expansion coefficient than the piezoelectric substrate are prepared, (b) a filler is applied to the rear surface 11a to fill the minute asperities, thereby forming a filling layer, (c) a surface of the filling layer is mirror-polished to such an extent that an arithmetic mean roughness Ra of the surface of the filling layer is smaller than an arithmetic mean roughness Ra of the rear surface 11a in a state of above (a), and (d) the surface of the filling layer and a surface of the support substrate are bonded to each other with an adhesive layer interposed therebetween, thereby forming a composite substrate.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: May 20, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroki Kobayashi, Takanori Sakurai, Yuji Hori, Yasunori Iwasaki
  • Publication number: 20120086312
    Abstract: According to a composite substrate manufacturing method of the present invention, (a) a piezoelectric substrate having minute asperities formed in a rear surface thereof, and a support substrate having a smaller thermal expansion coefficient than the piezoelectric substrate are prepared, (b) a filler is applied to the rear surface 11a to fill the minute asperities, thereby forming a filling layer, (c) a surface of the filling layer is mirror-polished to such an extent that an arithmetic mean roughness Ra of the surface of the filling layer is smaller than an arithmetic mean roughness Ra of the rear surface 11a in a state of above (a), and (d) the surface of the filling layer and a surface of the support substrate are bonded to each other with an adhesive layer interposed therebetween, thereby forming a composite substrate.
    Type: Application
    Filed: October 5, 2011
    Publication date: April 12, 2012
    Inventors: Hiroki Kobayashi, Takanori Sakurai, Yuji Hori, Yasunori Iwasaki
  • Patent number: 5625526
    Abstract: An electrostatic chuck of this invention includes a conductive film, an insulating coat formed on a susceptor to cover the conductive film, and a feeder circuit for applying a voltage to the conductive film to cause the insulating coat to generate an electrostatic attractive force. The feeder circuit includes a connecting conductor replacing a portion of the insulating coat to be electrically connected to the conductive film, a first feeder pin extending through the susceptor from its front surface side to its rear surface side and having one end portion electrically connected to the connecting conductor, an insulating member for insulating the first feeder pin from the susceptor, a second feeder pin having one end portion pressed against the other end portion of the first feeder pin to be electrically connected to the first feeder pin, and a power supply electrically connected to the second feeder pin.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: April 29, 1997
    Assignees: Tokyo Electron Limited, Tokyo Electron Yamanashi Limited
    Inventors: Masahide Watanabe, Masami Kubota, Shiro Koyama, Kenji Ishikawa, Kouichi Kazama, Mitsuaki Komino, Takanori Sakurai