Patents by Inventor Youichi Chikugo

Youichi Chikugo 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: 20200233354
    Abstract: A fixing unit includes a casing, a heating unit, a second rotary member, a first guide portion, a separation unit, and a separation unit movement mechanism. The separation unit has a separation member and movable relative to the casing between a first position at which the separation unit is positioned when the heating unit is positioned at a position to form a fixing nip portion, and a second position at which the separation unit is positioned when the heating unit is retracted from the position to form the fixing nip portion. The separation unit movement mechanism is configured to move the separation unit from the second position to the first position with the heating unit mounting to the position to form the fixing nip portion.
    Type: Application
    Filed: January 21, 2020
    Publication date: July 23, 2020
    Inventors: Hidekazu Tatezawa, Youichi Chikugo, Rikiya Takemasa, Kenichi Tanaka, Yutaro Tsuno
  • Publication number: 20200233353
    Abstract: A fixing unit includes an endless fixing belt, a rotary member configured to form a fixing nip portion, a resin-made pad configured to press an inner circumferential surface of the fixing belt by a peripheral surface toward the fixing nip portion, and a stay configured to support the pad. The stay includes a projection configured to protrude toward the pad. The pad includes a hole formed at a center in the width direction on the opposite surface and configured to fit with the projection.
    Type: Application
    Filed: January 16, 2020
    Publication date: July 23, 2020
    Inventors: Yutaro Tsuno, Youichi Chikugo, Rikiya Takemasa, Kenichi Tanaka, Hidekazu Tatezawa
  • Patent number: 10642187
    Abstract: An image forming apparatus includes an image forming portion, first and second rotatable members, a jam detecting portion, a detector, and a controller. When a sheet to be fed to a nip is a first sheet having a first length and a first width, the controller causes the first rotatable member rotating at a first speed to feed the first sheet. When the sheet is a second sheet having is a second length shorter than the first length and having the first width, the controller causes the first rotatable member rotating at a second speed slower than the first speed to feed the second sheet. The controller stops rotation of the first rotatable member in response to detection of the occurrence of a jam by the jam detecting portion.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: May 5, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Youichi Chikugo
  • Publication number: 20180335718
    Abstract: An image forming apparatus includes an image forming portion, first and second rotatable members, a jam detecting portion, a detector, and a controller. When a sheet to be fed to a nip is a first sheet having a first length and a first width, the controller causes the first rotatable member rotating at a first speed to feed the first sheet. When the sheet is a second sheet having is a second length shorter than the first length and having the first width, the controller causes the first rotatable member rotating at a second speed slower than the first speed to feed the second sheet. The controller stops rotation of the first rotatable member in response to detection of the occurrence of a jam by the jam detecting portion.
    Type: Application
    Filed: May 9, 2018
    Publication date: November 22, 2018
    Inventor: Youichi Chikugo
  • Publication number: 20170153581
    Abstract: An image heating apparatus includes rotatable members; a roller; a detector; a displacing mechanism configured to displace one longitudinal end of the roller from a first position to a second position depending on an output of the detector so as to return the endless belt to the predetermined zone; and a timer configured to count a time in which the endless belt is out of the predetermined zone from displacement of the roller to the second position by the displacing mechanism. When the time counted by the timer is a predetermined time, the displacing mechanism displaces the one longitudinal end of the roller to a third position remoter from the first position than the second position so as to return the endless belt is returned to the predetermined zone.
    Type: Application
    Filed: November 17, 2016
    Publication date: June 1, 2017
    Inventor: Youichi Chikugo
  • Patent number: 9367006
    Abstract: An image heating apparatus includes: an endless belt; a rotatable member configured to cooperate with the endless belt to form the nip; a back-up member including a heater and an electrode portion connected with the heater; an electric energy supply member mounted to the back-up member; a regulating member mounted to the back-up member to regulate movement of the endless belt in a longitudinal direction of the belt; and a covering member for covering the electrode portion when the endless belt is inserted and removed in a longitudinal direction in the state that the electric energy supply member and the regulating member are dismounted from the back-up member.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: June 14, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keisuke Yoshida, Takatoshi Chiba, Youichi Chikugo
  • Patent number: 9348292
    Abstract: A fixing device includes a fixing device for nipping and feeding a sheet to fix a toner image on a sheet, said fixing device including a first fixing member contactable with a front surface of the sheet, and a second fixing member provided with an electroconductive surface layer contactable with a back surface of the sheet; a feeder provided downstream of said fixing device with respect to a sheet feeding direction to nip and feed the sheet, a feeder including a first feeding roller contactable with the front surface, and a second feeding roller provided with an electroconductive surface layer contactable with the back surface; a first discharging member contacted with said electroconductive surface layer of said second fixing member to discharge said second fixing member; and a second discharging member contacted with said electroconductive surface layer of said second feeding roller to discharge said second feeding roller.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: May 24, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Youichi Chikugo
  • Patent number: 9207600
    Abstract: A relationship X<Y?Z is satisfied, where X is a width of a roughening roller in a longitudinal direction, Y is a width, in the longitudinal direction, of an area where an image is able to be formed on a sheet having a maximum width usable in an apparatus, and Z is a width, in the longitudinal direction, of an area where a fixing belt is able to be rubbed by the roughening roller.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 8, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Youichi Chikugo
  • Publication number: 20150277312
    Abstract: A fixing device includes a fixing device for nipping and feeding a sheet to fix a toner image on a sheet, said fixing device including a first fixing member contactable with a front surface of the sheet, and a second fixing member provided with an electroconductive surface layer contactable with a back surface of the sheet; a feeder provided downstream of said fixing device with respect to a sheet feeding direction to nip and feed the sheet, a feeder including a first feeding roller contactable with the front surface, and a second feeding roller provided with an electroconductive surface layer contactable with the back surface; a first discharging member contacted with said electroconductive surface layer of said second fixing member to discharge said second fixing member; and a second discharging member contacted with said electroconductive surface layer of said second feeding roller to discharge said second feeding roller.
    Type: Application
    Filed: March 26, 2015
    Publication date: October 1, 2015
    Inventor: Youichi Chikugo
  • Patent number: 9026020
    Abstract: A fixing apparatus includes: a fixing device for fixing a toner image on a sheet at a nip; and a guiding member for guiding the sheet toward the nip. The guiding member includes: an electroconductive metal plate which is electrically grounded; and an insulating resin member, provided to cover a part of the metal plate, slidable with the sheet. The resin member includes: a plurality of openings, provided at different positions with respect to a direction perpendicular to a sheet conveyance direction, for permitting exposure of the metal plate along the sheet conveyance direction; and a downstream portion, substantially free from a stepped portion, which is provided at a downstreammost portion with respect to the sheet conveyance direction and which is extended flat in the direction perpendicular to the sheet conveyance direction in a sheet conveyance region.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Youichi Chikugo
  • Publication number: 20140161479
    Abstract: An image heating apparatus includes an endless belt; a rotatable member configured to cooperate with the endless belt to form the nip; a back-up member including a heater and an electrode portion connected with the heater; an electric energy supply member mounted to the back-up member; a regulating member mounted to the back-up member to regulate movement of the endless belt in a longitudinal direction thereof; and a covering member for covering the electrode portion when the endless belt is inserted and removed in a longitudinal direction in the state that the electric energy supply member and the regulating member are dismounted from the back-up member.
    Type: Application
    Filed: December 4, 2013
    Publication date: June 12, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Keisuke Yoshida, Takatoshi Chiba, Youichi Chikugo
  • Publication number: 20130279953
    Abstract: A fixing apparatus includes: a fixing device for fixing a toner image on a sheet at a nip; and a guiding member for guiding the sheet toward the nip. The guiding member includes: an electroconductive metal plate which is electrically grounded; and an insulating resin member, provided to cover a part of the metal plate, slidable with the sheet. The resin member includes: a plurality of openings, provided at different positions with respect to a direction perpendicular to a sheet conveyance direction, for permitting exposure of the metal plate along the sheet conveyance direction; and a downstream portion, substantially free from a stepped portion, which is provided at a downstreammost portion with respect to the sheet conveyance direction and which is extended flat in the direction perpendicular to the sheet conveyance direction in a sheet conveyance region.
    Type: Application
    Filed: April 16, 2013
    Publication date: October 24, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Youichi Chikugo
  • Publication number: 20130266353
    Abstract: A relationship X<Y?Z is satisfied, where X is a width of a roughening roller in a longitudinal direction, Y is a width, in the longitudinal direction, of an area where an image is able to be formed on a sheet having a maximum width usable in an apparatus, and Z is a width, in the longitudinal direction, of an area where a fixing belt is able to be rubbed by the roughening roller.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 10, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Youichi Chikugo
  • Patent number: 8543047
    Abstract: An image forming system includes a color image forming apparatus including: a color image forming portion for forming a color toner image on a surface of a recording material; a first fixing device including a first fixing portion; a second fixing device including a second fixing portion; image forming and a third fixing device for fixing a transparent toner image at a third fixing portion; and a controller for controlling a switching mechanism so that the conveyance direction of the recording material is switched to the bypass direction of the second fixing portion, or to the direction toward the second fixing portion based on whether or not the color image forming portion is subjectd to formation of the transparent toner image by the transparent image forming apparatus.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: September 24, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichiro Hosoi, Youichi Chikugo
  • Publication number: 20120051811
    Abstract: An image forming system includes a color image forming apparatus including: a color image forming portion for forming a color toner image on a surface of a recording material; a first fixing device including a first fixing member for fixing the color toner image on the surface of the recording material by heating, at a first fixing portion, the surface of the recording material on which the color toner image is formed immediately before by the color image forming portion; a second fixing device including a second fixing member for heating, at a second fixing portion, the surface of the recording material heated immediately before by the first fixing member; and a switching mechanism for switching a conveyance direction of the recording material passing through the first fixing portion to a direction toward the second fixing portion and to a bypass direction of the second fixing portion; a transparent image forming apparatus including: a transparent image forming portion capable of forming a transparent toner
    Type: Application
    Filed: August 29, 2011
    Publication date: March 1, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shinichiro Hosoi, Youichi Chikugo
  • Patent number: 7926800
    Abstract: A sheet processing apparatus includes an aligning member configured to align an end of a bundle of sheets including a folded sheet by engaging with the edge of the bundle of sheets, and a sheet processing unit configured to process the bundle of sheets having the end aligned by the aligning member. The end of the bundle of sheets engaged with the aligning member is opposite to a folded portion of the folded sheet.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: April 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsuteru Oikawa, Kenichi Hayashi, Kenichi Tamura, Takashi Sugiura, Hitoshi Kato, Wataru Kawata, Keiko Fujita, Youichi Chikugo
  • Patent number: 7890038
    Abstract: The present invention provides an image heating apparatus capable of holding an open/close unit at a normal position and capable of inexpensively avoiding conveyance failure and deterioration in image quality. An image heating apparatus includes a fixing an roller 71 and a pressing belt 731, a pressing mechanism 75 which rotates a pressing belt unit 73 having a pressing belt 731 to retract the pressing belt 731 from a pressing contact position, a separation projection 800 which separates the sheet S from the pressing belt 731, and an open/close unit 81 which rotates a separating unit (separation projection 800, division plate 817) to retract the separation projection 800 from a separating position. The pressing belt unit 73 includes a push-up member 840 which locks the separating unit located in the separating position when the pressing belt unit 73 is in the pressing contact position.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: February 15, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Youichi Chikugo, Seiichiro Kameda, Taiya Hirayama, Masashi Sawada
  • Patent number: 7890024
    Abstract: The present invention provides an image heating apparatus which can easily attach and detach an external heating unit and easily perform a maintenance operation. The image heating apparatus has a fixing apparatus frame 62 which rotatably supports a fixing roller 40, a unit including a pressure spring 35 which urges an external heating roller 53 toward the fixing roller 40, a pressure guide shaft 37 which holds the pressure spring 35, and a pressure stay 38 which slidably supports the pressure guide shaft 37, a screw 61 which detachably fixes the unit to the fixing apparatus frame 62 via the pressure stay 38, and a pressure releasing arm 39 which releases the force of the pressure spring 35 acting on the screw 61 via the pressure stay 38 by sliding the pressure guide shaft 37 relative to the pressure stay 38.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: February 15, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taiya Hirayama, Seiichiro Kameda, Masashi Sawada, Youichi Chikugo
  • Patent number: 7798491
    Abstract: A registration unit includes a skew correction roller pair configured to rotate a sheet conveyed from a conveyance roller pair and to correct skew of the sheet. The registration unit sheet further includes a projectable swinging guide arranged between the conveyance roller pair and the skew correction roller pair to deflect the sheet. The skew correction roller pair corrects the skew of the sheet deflected by the swinging guide.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: September 21, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junichi Moteki, Takashi Fujita, Hiroaki Takagishi, Nobuto Kamiyama, Seiichiro Kameda, Youichi Chikugo, Satohisa Tateishi, Kozo Inoue
  • Patent number: 7762537
    Abstract: A sheet processing apparatus is operable to cut an edge portion of a sheet. The sheet processing apparatus is operable to calculate a sheet utilization efficiency based on an area of the sheet before cutting and an area of a sheet obtained by cutting the edge portion.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: July 27, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Kato, Wataru Kawata, Keiko Fujita, Youichi Chikugo