Patents by Inventor Osamu Takagi

Osamu Takagi 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).

  • Fixing device and image forming apparatus
    Patent number: 9804544
    Abstract: A fixing device includes a roller, an endless belt, and a heat generating member disposed in a space inside the endless belt, extending in a width direction of the endless belt, and pressing the endless belt against the roller. A sheet is passed through a nip formed between the roller and a portion of the endless belt pressed by the heat generating member, such that an image on the sheet is fixed thereto. The heat generating member includes first and second heat generating portions that are adjacent to each other along the width direction and independently operable from each other. A boundary of the first and second heat generating portions extends in a direction inclined with respect to a sheet conveying direction.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: October 31, 2017
    Assignee: Toshiba TEC Kabushiki Kaisha
    Inventor: Osamu Takagi
  • Fixing device and image forming apparatus
    Patent number: 9804545
    Abstract: A fixing device includes a roller, an endless belt, and a heat generating member disposed in a space inside the endless belt, extending in a width direction of the endless belt, and pressing the endless belt against the roller. A sheet is passed through a nip formed between the roller and a portion of the endless belt pressed by the heat generating member, such that an image on the sheet is fixed thereto. The heat generating member includes first and second heat generating portions that are adjacent to each other along the width direction, and the first portion heat generating is independently operable from the second heat generating portion.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: October 31, 2017
    Assignee: Toshiba TEC Kabushiki Kaisha
    Inventor: Osamu Takagi
  • FIXING DEVICE AND FIXING TEMPERATURE CONTROL METHOD OF FIXING DEVICE
    Publication number: 20170235262
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of a medium, heating means for including plural heat-generating members which are two-dimensionally arranged such that the heat-generating members are lined up along two parallel lines or more which are vertical to a transport direction of the medium and divided at locations on the parallel lines, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and heating control means for selecting a group of the heat-generating members which are lined up in the two-dimensional arrangement, conducting the selected group of the heat-generating members, and controlling the heating means.
    Type: Application
    Filed: May 2, 2017
    Publication date: August 17, 2017
    Inventors: Shoko Shimmura, Osamu Takagi
  • Fixing device and fixing temperature control method of fixing device
    Patent number: 9720360
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of an image forming area of a medium, heating means for including an endless rotating body, plural heat-generating members which are formed in a perpendicular direction to a transporting direction, inclined by a predetermined angle, and divided by a predetermined length, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and nipping and carrying the medium in the transporting direction along with the heating means, and heating control means for controlling the switching unit to select and conduct heat-generating members and controlling the heating means to heat the medium.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: August 1, 2017
    Assignees: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventor: Osamu Takagi
  • FIXING DEVICE AND FIXING TEMPERATURE CONTROL METHOD OF FIXING DEVICE
    Publication number: 20170185017
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of an image forming area of a medium, heating means for including an endless rotating body, plural heat-generating members which are formed in a perpendicular direction to a transporting direction, inclined by a predetermined angle, and divided by a predetermined length, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and nipping and carrying the medium in the transporting direction along with the heating means, and heating control means for controlling the switching unit to select and conduct heat-generating members and controlling the heating means to heat the medium.
    Type: Application
    Filed: March 14, 2017
    Publication date: June 29, 2017
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Osamu Takagi
  • Fixing device and fixing temperature control method of fixing device
    Patent number: 9671730
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of a medium, heating means for including plural heat-generating members which are two-dimensionally arranged such that the heat-generating members are lined up along two parallel lines or more which are vertical to a transport direction of the medium and divided at locations on the parallel lines, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and heating control means for selecting a group of the heat-generating members which are lined up in the two-dimensional arrangement, conducting the selected group of the heat-generating members, and controlling the heating means.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: June 6, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Shoko Shimmura, Osamu Takagi
  • FIXING DEVICE AND FIXING TEMPERATURE CONTROL METHOD OF FIXING DEVICE
    Publication number: 20160291512
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of an image forming area of a medium, heating means for including an endless rotating body, plural heat-generating members which are formed in a perpendicular direction to a transporting direction, inclined by a predetermined angle, and divided by a predetermined length, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and nipping and carrying the medium in the transporting direction along with the heating means, and heating control means for controlling the switching unit to select and conduct heat-generating members and controlling the heating means to heat the medium.
    Type: Application
    Filed: June 20, 2016
    Publication date: October 6, 2016
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Osamu Takagi
  • FIXING DEVICE AND FIXING TEMPERATURE CONTROL METHOD OF FIXING DEVICE
    Publication number: 20160274517
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of a medium, heating means for including plural heat-generating members which are two-dimensionally arranged such that the heat-generating members are lined up along two parallel lines or more which are vertical to a transport direction of the medium and divided at locations on the parallel lines, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and heating control means for selecting a group of the heat-generating members which are lined up in the two-dimensional arrangement, conducting the selected group of the heat-generating members, and controlling the heating means.
    Type: Application
    Filed: May 9, 2016
    Publication date: September 22, 2016
    Inventors: Shoko Shimmura, Osamu Takagi
  • Ink jet head having nozzle plate equipped with piezoelectric elements
    Patent number: 9415597
    Abstract: An ink jet head includes: a pressure chamber to be filled with ink formed in a pressure chamber structure, the pressure chamber in which an etching limiter made of a material different from a material of the pressure chamber structure is formed on an inner wall surface of the pressure chamber; a nozzle plate comprising a nozzle that leading to the pressure chamber and a movable range fitted to the etching limiter; and a flat driver comprising a piezoelectric body to operate the movable range and arranged on the nozzle plate.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: August 16, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takashi Kawakubo, Kazuhide Abe, Yasushi Tomizawa, Ryuichi Arai, Ryutaro Kusunoki, Osamu Takagi
  • Fixing device and fixing temperature control method of fixing device
    Patent number: 9411276
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of an image forming area of a medium, heating means for including an endless rotating body, plural heat-generating members which are formed in a perpendicular direction to a transporting direction, inclined by a predetermined angle, and divided by a predetermined length, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and nipping and carrying the medium in the transporting direction along with the heating means, and heating control means for controlling the switching unit to select and conduct heat-generating members and controlling the heating means to heat the medium.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: August 9, 2016
    Assignees: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventor: Osamu Takagi
  • IMAGE FORMING APPARATUS HAVING FIXING DEVICE THAT RESPONDS TO REQUEST WHEN USING DECOLORABLE INK
    Publication number: 20160223960
    Abstract: An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material that is not thermally decolorizable; a second image forming unit which forms a second image on a second recording medium with a second material that is thermally decolorizable; a fixing device which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a controller which controls the fixing device so that a temperature of the fixing device is lower than a decolorizing temperature of the second material when the second recording medium reaches the fixing device.
    Type: Application
    Filed: April 7, 2016
    Publication date: August 4, 2016
    Inventors: Yoshiaki KANEKO, Minoru YOSHIDA, Osamu TAKAGI, Takahito KABAI, Hiroyuki TAGUCHI, Ken IGUCHI
  • Image forming apparatus and method using decolorable ink
    Patent number: 9377724
    Abstract: An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material which is not thermally decolorized; a second image forming unit which forms a second image on a second recording medium with a second material which is thermally decolorized; a fixing unit which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a control unit which controls the fixing unit so that the temperature of the second recording medium passing through the fixing unit becomes lower than a decolorizing temperature of the second material.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: June 28, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Yoshiaki Kaneko, Minoru Yoshida, Osamu Takagi, Takahito Kabai, Hiroyuki Taguchi, Ken Iguchi
  • Fixing device and fixing temperature control method of fixing device
    Patent number: 9360810
    Abstract: According to one embodiment, a fixing device includes determination means for determining the size of a medium, heating means for including plural heat-generating members which are two-dimensionally arranged such that the heat-generating members are lined up along two parallel lines or more which are vertical to a transport direction of the medium and divided at locations on the parallel lines, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and heating control means for selecting a group of the heat-generating members which are lined up in the two-dimensional arrangement, conducting the selected group of the heat-generating members, and controlling the heating means.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: June 7, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Shoko Shimmura, Osamu Takagi
  • Inkjet head having high mechanical strength and method of manufacturing the same
    Patent number: 9358785
    Abstract: According to one embodiment, an inkjet head includes a nozzle plate including a first surface, a second surface opposite to the first surface, a through hole configured to make the first surface communicate with the second surface, and a cylindrical member integrally extending from the second surface by extending the through hole. An ink pressure chamber communicating with the cylindrical member and the through hole is provided on the second surface side of the nozzle plate. This inkjet head also includes an actuator which discharges ink in the ink pressure chamber from the through hole by displacing the nozzle plate.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: June 7, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Takashi Kawakubo, Kazuhide Abe, Yasushi Tomizawa, Ryuichi Arai, Ryutaro Kusunoki, Osamu Takagi
  • Inkjet head including nozzle plate provided with piezoelectric element
    Patent number: 9340018
    Abstract: An inkjet head includes: a pressure chamber in which ink is filled; a nozzle plate which is provided on a first surface of the pressure chamber and which includes a nozzle communicating with the pressure chamber; and a planar drive section which is formed on the nozzle plate so as to extend from above a partition wall of the pressure chamber to above the pressure chamber, excluding a hole area around the nozzle and which has a piezoelectric body.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: May 17, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takashi Kawakubo, Ryuichi Arai, Ryutaro Kusunoki, Osamu Takagi
  • Image forming apparatus having fixing device that responds to request when using decolorable ink
    Patent number: 9335680
    Abstract: An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material that is not thermally decolorizable; a second image forming unit which forms a second image on a second recording medium with a second material that is thermally decolorizable; a fixing device which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a controller which controls the fixing device so that a temperature of the fixing device is lower than a decolorizing temperature of the second material when the second recording medium reaches the fixing device.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: May 10, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Yoshiaki Kaneko, Minoru Yoshida, Osamu Takagi, Takahito Kabai, Hiroyuki Taguchi, Ken Iguchi
  • FIXING DEVICE AND IMAGE FORMING APPARATUS
    Publication number: 20160085188
    Abstract: A fixing device includes a roller, an endless belt, and a heat generating member disposed in a space inside the endless belt, extending in a width direction of the endless belt, and pressing the endless belt against the roller. A sheet is passed through a nip formed between the roller and a portion of the endless belt pressed by the heat generating member, such that an image on the sheet is fixed thereto. The heat generating member includes first and second heat generating portions that are adjacent to each other along the width direction, and the first portion heat generating is independently operable from the second heat generating portion.
    Type: Application
    Filed: September 22, 2015
    Publication date: March 24, 2016
    Inventor: Osamu TAKAGI
  • FIXING DEVICE AND IMAGE FORMING APPARATUS
    Publication number: 20160085187
    Abstract: A fixing device includes a roller, an endless belt, and a heat generating member disposed in a space inside the endless belt, extending in a width direction of the endless belt, and pressing the endless belt against the roller. A sheet is passed through a nip formed between the roller and a portion of the endless belt pressed by the heat generating member, such that an image on the sheet is fixed thereto. The heat generating member includes first and second heat generating portions that are adjacent to each other along the width direction and independently operable from each other. A boundary of the first and second heat generating portions extends in a direction inclined with respect to a sheet conveying direction.
    Type: Application
    Filed: September 22, 2015
    Publication date: March 24, 2016
    Inventor: Osamu TAKAGI
  • INKJET HEAD HAVING HIGH MECHANICAL STRENGTH AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20160052272
    Abstract: According to one embodiment, an inkjet head includes a nozzle plate including a first surface, a second surface opposite to the first surface, a through hole configured to make the first surface communicate with the second surface, and a cylindrical member integrally extending from the second surface by extending the through hole. An ink pressure chamber communicating with the cylindrical member and the through hole is provided on the second surface side of the nozzle plate. This inkjet head also includes an actuator which discharges ink in the ink pressure chamber from the through hole by displacing the nozzle plate.
    Type: Application
    Filed: December 17, 2014
    Publication date: February 25, 2016
    Inventors: Takashi KAWAKUBO, Kazuhide ABE, Yasushi TOMIZAWA, Ryuichi ARAI, Ryutaro KUSUNOKI, Osamu TAKAGI
  • METHOD OF MANUFACTURING AN INKJET HEAD
    Publication number: 20150343783
    Abstract: A method of manufacturing an inkjet head includes: forming an annular groove on a first surface of a substrate made of a first material; forming a side wall by filling a second material in the annular groove and forming a nozzle plate by forming a thin film made of the second material on the first surface of the substrate; forming a ring-shaped piezoelectric element on the nozzle plate surrounded by the side wall, the piezoelectric element comprising a lower electrode, a piezoelectric film, and an upper electrode; forming a ink chamber disposed over an area of a lower surface of the nozzle plate that is surrounded by the side wall from a second surface opposite the first surface of the substrate, the ink chamber being formed by a single dry etching process; and forming a nozzle to the nozzle plate positioned inside of the annular piezoelectric element.
    Type: Application
    Filed: August 10, 2015
    Publication date: December 3, 2015
    Inventors: Takashi KAWAKUBO, Kazuhide ABE, Yasushi TOMIZAWA, Ryuichi ARAI, Ryutaro KUSUNOKI, Osamu TAKAGI