Patents by Inventor Ryota SAEKI

Ryota SAEKI 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).

  • Publication number: 20190121267
    Abstract: A fixing device includes an endless belt, a heater in contact with an inner surface of the belt and divided into a plurality of heater blocks in a width direction of the belt, a pressing member positioned to face the heater with the belt interposed therebetween and configured to press a conveyed sheet against the belt and the heater, a temperature sensor disposed in each of at least half of the heater blocks, and a processor. The processor selects heater blocks based on width and position of the conveyed sheet to form a heat generation block, controls power supplied to the heater blocks so that a temperature of the heat generation block is within a predetermined temperature range, and selects the temperature sensor disposed in a heater block having a non-paper passing region and control an excessive temperature rise in the non-paper passing region.
    Type: Application
    Filed: August 23, 2018
    Publication date: April 25, 2019
    Inventors: Chie MIYAUCHI, Osamu TAKAGI, Ryota SAEKI
  • Publication number: 20160077474
    Abstract: An image forming apparatus comprises a fixing device configured to fix an image formed by an image forming section on an image receiving medium. The fixing device includes a heating roller, an auxiliary roller arranged at an entering side of the image receiving medium, and a fixing belt which is stretched by a plurality of rollers including the auxiliary roller and cyclically rotates in a state of being contacted with part of the outer periphery of the heating roller; wherein the auxiliary roller is arranged at a position which is closer to the entering side of the image receiving medium than a fixing nip section between the heating roller and the fixing belt and is at a preset distance away from the fixing nip section. The image forming apparatus further comprises an inlet guide configured closer to the entering side of the image receiving medium than the auxiliary roller.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 17, 2016
    Inventors: Takaho Watanabe, Satoshi Kinouchi, Tokihiko Ise, Ryota Saeki
  • Publication number: 20160077473
    Abstract: In accordance with one embodiment, an image forming apparatus comprises an image forming section configured to be capable of forming an image with erasable coloring agent; a storage section configured to include a first and a second cassettes capable of storing an image receiving medium; an erasing section configured to heat the image receiving medium on which an image is formed with the erasable coloring agent at a pre-set temperature to erase the image; and a conveyance section configured to convey the image receiving medium stacked in the first cassette through a first conveyance path which passes through the image forming section and the erasing section, and convey the image receiving medium the image on which is erased by the erasing section to the second cassette of the storage section through a second conveyance path.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 17, 2016
    Inventors: Tokihiko Ise, Satoshi Kinouchi, Takaho Watanabe, Ryota Saeki
  • Patent number: 9244396
    Abstract: In accordance with one embodiment, an image forming apparatus comprises a transfer device configured to transfer an image onto a conveyed recording medium (sheet); a fixer configured to heat, press and convey the sheet to fix the transferred image on the sheet; a sensor configured to detect the bending amount of the sheet between the transfer device and the fixer; and a control section configured to control at least one of the transfer device and the fixer so that the recording medium between the transfer device and the fixer is conveyed in a bent state and the bending amount of the sheet is reduced if the bending amount of the sheet exceeds a preset one according to the detection result of the sensor.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: January 26, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Satoshi Kinouchi, Takaho Watanabe, Ryota Saeki, Tokihiko Ise
  • Publication number: 20160018768
    Abstract: In accordance with one embodiment, an image forming apparatus comprises a transfer device configured to transfer an image onto a conveyed recording medium (sheet); a fixer configured to heat, press and convey the sheet to fix the transferred image on the sheet; a sensor configured to detect the bending amount of the sheet between the transfer device and the fixer; and a control section configured to control at least one of the transfer device and the fixer so that the recording medium between the transfer device and the fixer is conveyed in a bent state and the bending amount of the sheet is reduced if the bending amount of the sheet exceeds a preset one according to the detection result of the sensor.
    Type: Application
    Filed: July 15, 2014
    Publication date: January 21, 2016
    Inventors: Satoshi Kinouchi, Takaho Watanabe, Ryota Saeki, Tokihiko Ise
  • Publication number: 20150378289
    Abstract: In accordance with one embodiment, an image forming apparatus comprising a printer section configured to include a first image forming section which forms a monochrome image with inerasable coloring agent and a plurality of color image forming sections at least one of which forms a color image with erasable coloring agent; and a control section configured to control the printer section so that the printer section operates in a first mode of forming a monochrome image through the first image forming section, a second mode of forming an erasable image with the erasable coloring agent, and a third mode of forming an image through the first image forming section and the plurality of color image forming sections.
    Type: Application
    Filed: June 27, 2014
    Publication date: December 31, 2015
    Inventors: Satoshi Kinouchi, Ryota Saeki, Takaho Watanabe, Tokihiko Ise
  • Patent number: 9207604
    Abstract: In accordance with one embodiment, an image forming apparatus comprises a fixing section, a pressing section, a plurality of nips, a plurality of conveyance paths, a switch section and a control section. The fixing section is heated through a heat source. The pressing section is pressed against the fixing section to form a nip. The plurality of nips are formed by at least one fixing section and at least one pressing section. The plurality of conveyance paths pass through at least one of the plurality of nips. The switch section switches the plurality of conveyance paths. The control section controls the switch section.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: December 8, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Tokihiko Ise, Satoshi Kinouchi, Takaho Watanabe, Ryota Saeki
  • Patent number: 9158247
    Abstract: According to one embodiment, a fuser includes a fixing belt including a conductive layer, an induction-current generating section to electromagnetically induction-heat the conductive layer, an opposed section to form a nip in cooperation with the fixing belt, an auxiliary heat generating section electromagnetically induction-heated by the induction-current generating section, and a moving section to move the auxiliary heat generating section with respect to the fixing belt.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: October 13, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Kazuhiko Kikuchi, Masahiro Doi, Toshihiro Sone, Shuji Yokoyama, Tadashi Noguchi, Satoshi Kinouchi, Ryota Saeki, Shigeru Fujiwara, Shoko Shimmura, Kazutoshi Takahashi, Takafumi Amano
  • Patent number: 9158220
    Abstract: In accordance with one embodiment, an image forming apparatus comprises an image forming section configured to form a toner image on a printing recording medium, a fixing section configured to heat the printing recording medium printed with the toner image at a fixing temperature, a temperature control section configured to control the fixing section to a temperature above a color erasing temperature, a conveyance section configured to convey the printing recording medium or a color erasing recording medium to the fixing section, and a speed control section configured to control, according to a setting temperature of the fixing section, a speed ratio of a traveling speed of the fixing section to a conveyance speed of the conveyance section.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: October 13, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Satoshi Kinouchi, Ryota Saeki, Takaho Watanabe
  • Patent number: 9075362
    Abstract: According to one embodiment, a fuser includes a heat roller, an endless belt, a first press roller and a second press roller. The heat roller rotates and contacts a toner surface side of a sheet, and heats the sheet. The endless belt contacts a part of an outer peripheral surface of the heat roller. The first press roller contacts a part of an inner peripheral surface of the endless belt, and is provided at an insertion part of the sheet in a nip portion where the heat roller contacts the endless belt. The second press roller contacts a part of the inner peripheral surface of the endless belt, is provided at an exit part of the sheet in the nip portion, and has a lower rotational resistance than the first press roller.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: July 7, 2015
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kazutoshi Takahashi, Satoshi Kinouchi, Ryota Saeki, Shoko Shimmura, Toshihiro Sone
  • Patent number: 9031484
    Abstract: Certain embodiments provide a fuser including a cylindrical fixing belt, a heating unit configured to heat the fixing belt, a pressurized section, a first nip forming section, a second nip forming section, and a moving mechanism. The pressurized section is arranged in contact with the fixing belt. The first nip forming section is fixed in a position where the first nip forming section presses the fixing belt against the pressurized section. The second nip forming section is configured to be movable between a position where the second nip forming section can press the fixing belt against the pressurized section and a position where the second nip forming section is separated from the fixing belt. The moving mechanism moves the second nip forming section.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: May 12, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Yoshinori Tsueda, Satoshi Kinouchi, Ryota Saeki, Toshihiro Sone
  • Patent number: 8913910
    Abstract: A fixing device includes a fixing belt including a metal layer, a pressing member to form a nip between the pressing member and the fixing belt, an induction current generating coil that faces an outer periphery of the fixing belt, and heats the fixing belt located at a nip position through a hollow inside of the fixing belt, and a coil controller supplies a high frequency to the induction current generating coil.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: December 16, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Satoshi Kinouchi, Toshihiro Sone, Ryota Saeki
  • Publication number: 20140341600
    Abstract: According to one embodiment, a fuser includes a fixing belt including a conductive layer, an induction-current generating section to electromagnetically induction-heat the conductive layer, an opposed section to form a nip in cooperation with the fixing belt, an auxiliary heat generating section electromagnetically induction-heated by the induction-current generating section, and a moving section to move the auxiliary heat generating section with respect to the fixing belt.
    Type: Application
    Filed: August 1, 2014
    Publication date: November 20, 2014
    Inventors: Kazuhiko KIKUCHI, Masahiro DOI, Toshihiro SONE, Shuji YOKOYAMA, Tadashi NOGUCHI, Satoshi KINOUCHI, Ryota SAEKI, Shigeru FUJIWARA, Shoko SHIMMURA, Kazutoshi TAKAHASHI, Takafumi AMANO
  • Patent number: 8879976
    Abstract: An image forming apparatus according to an embodiment includes: an image erasing section including a first member which has an elastic layer and heats a recording medium having a thermally decolorizable toner image on the toner image side and a second member which erases the toner image by allowing the recording medium in cooperation with the first member; an image forming section which transfers a thermally decolorizable toner image onto the recording medium on which the toner image is erased to form an unfixed toner image; and an image fixing section including a third member which does not have an elastic layer and heats the recording medium on the unfixed toner image side and a fourth member which fixes the unfixed toner image by allowing the recording medium in cooperation with the third member.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: November 4, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Shigeru Fujiwara, Satoshi Kinouchi, Ryota Saeki, Shoko Shimmura, Kazutoshi Takahashi, Toshihiro Sone, Takafumi Amano
  • Patent number: 8855540
    Abstract: According to one embodiment, a fuser includes a fixing belt including a conductive layer, an induction-current generating section to electromagnetically induction-heat the conductive layer, an opposed section to form a nip in cooperation with the fixing belt, an auxiliary heat generating section electromagnetically induction-heated by the induction-current generating section, and a moving section to move the auxiliary heat generating section with respect to the fixing belt.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: October 7, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Kazuhiko Kikuchi, Masahiro Doi, Toshihiro Sone, Shuji Yokoyama, Tadashi Noguchi, Satoshi Kinouchi, Ryota Saeki, Shigeru Fujiwara, Shoko Shimmura, Kazutoshi Takahashi, Takafumi Amano
  • Patent number: 8843045
    Abstract: A fuser is equipped with a heating roller, fixing belt, pressure roller, pad, and spring. The heating roller is located on the downstream side of the fixing belt with respect to the sheet conveyance direction, and as the heating roller rotates, contacts the sheet toner side of a sheet, heating the sheet. The fixing belt contacts the side of the sheet opposite to the toner side of the sheet. The pressure roller comes into contact with the heating roller via the fixing belt. The pad is of a softer material than the fixing belt, and, as the pad exerts a force on the heating roller by pressing on the fixing belt, a downstream side of the pad with respect to the sheet conveyance direction is inclined away from the pressure roller. Springs urge the pad toward the pressure roller and the heating roller.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: September 23, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Hiroyuki Ishikawa, Satoshi Kinouchi, Ryota Saeki, Kazutoshi Takahashi, Shoko Shimmura, Toshihiro Sone
  • Publication number: 20140240724
    Abstract: In accordance with one embodiment, an image forming apparatus comprises an image forming section configured to form a toner image on a printing recording medium, a fixing section configured to heat the printing recording medium printed with the toner image at a fixing temperature, a temperature control section configured to control the fixing section to a temperature above a color erasing temperature, a conveyance section configured to convey the printing recording medium or a color erasing recording medium to the fixing section, and a speed control section configured to control, according to a setting temperature of the fixing section, a speed ratio of a traveling speed of the fixing section to a conveyance speed of the conveyance section.
    Type: Application
    Filed: February 24, 2014
    Publication date: August 28, 2014
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Satoshi Kinouchi, Ryota Saeki, Takaho Watanabe
  • Publication number: 20140050498
    Abstract: A fixing device includes a fixing belt including a metal layer, a pressing member to form a nip between the pressing member and the fixing belt, an induction current generating coil that faces an outer periphery of the fixing belt, and heats the fixing belt located at a nip position through a hollow inside of the fixing belt, and a coil controller supplies a high frequency to the induction current generating coil.
    Type: Application
    Filed: October 30, 2013
    Publication date: February 20, 2014
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Satoshi KINOUCHI, Toshihiro SONE, Ryota SAEKI
  • Patent number: 8600254
    Abstract: A fixing device includes a fixing belt including a metal layer, a pressing member to form a nip between the pressing member and the fixing belt, an induction current generating coil that faces an outer periphery of the fixing belt, and heats the fixing belt located at a nip position through a hollow inside of the fixing belt, and a coil controller supplies a high frequency to the induction current generating coil.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: December 3, 2013
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Satoshi Kinouchi, Toshihiro Sone, Ryota Saeki
  • Patent number: RE46634
    Abstract: According to one embodiment, a fuser includes a heat roller, an endless belt, a first press roller and a second press roller. The heat roller rotates and contacts a toner surface side of a sheet, and heats the sheet. The endless belt contacts a part of an outer peripheral surface of the heat roller. The first press roller contacts a part of an inner peripheral surface of the endless belt, and is provided at an insertion part of the sheet in a nip portion where the heat roller contacts the endless belt. The second press roller contacts a part of the inner peripheral surface of the endless belt, is provided at an exit part of the sheet in the nip portion, and has a lower rotational resistance than the first press roller.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: December 12, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kazutoshi Takahashi, Satoshi Kinouchi, Ryota Saeki, Shoko Shimmura, Toshihiro Sone