Having Copy-handling During Fixing Patents (Class 399/322)
  • Patent number: 10409203
    Abstract: An image forming apparatus includes an executing portion for cleaning a rotatable heating member by introducing, into a nip, sheets, of a plurality of sheets, on which a predetermined toner image is formed by an image forming portion, a changing mechanism for making positional relationships of first and second sheets, of the plurality of sheets, relative to the rotatable heating member, different from each other with respect to a widthwise direction of the rotatable heating member when the first and second sheets are successively introduced into the nip in a cleaning mode, and a re-introducing mechanism for re-introducing the first and second sheets into the nip, the first and second sheets having passed through the nip and having been turned upside down, wherein the changing mechanism changes the relative positional relationship of the first and second sheets, which are turned upside down, relative to the rotatable heating member.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: September 10, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanobu Tanaka, Oki Kitagawa, Akiyoshi Shinagawa
  • Patent number: 10324401
    Abstract: An image forming apparatus includes a first image forming section configured to form an image on a sheet with a decolorable color material decolorable, a second image forming section configured to form an image on the sheet with a non-decolorable color material, a fixing device configured to heat the sheet on which the images are formed with the decolorable color material and the non-decolorable color material, and a cooling section configured to cool the heated sheet.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: June 18, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Yoshikatsu Numakura
  • Patent number: 10280020
    Abstract: A sheet conveyance apparatus includes a rotary drive member configured to rotate by receiving transmission of driving force from a driving source, a driven rotary member arranged with a predetermined distance in a sheet conveyance direction from the rotary drive member, an endless belt member supported on the rotary drive member and the driven rotary member, and configured to be rotated by a rotation of the rotary drive member, and a guide member configured to guide a sheet conveyed by the belt member. The guide member is mounted to a shaft configured to support the rotary drive member, and the rotary drive member is supported on the shaft in a rotatable manner with respect to the shaft.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: May 7, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Atsushi Yoshida
  • Patent number: 10120307
    Abstract: An image heating apparatus for use with an image forming apparatus. The image heating apparatus includes a pair of rotatable members configured to form a nip for heating an image on a recording material, a guide member configured to guide the recording material toward the nip, a supporting mechanism configured to rotatably support the guide member about an axis so that the guide member is movable between a first position at which the guide member guides the recording material and a second position at which the guide member blocks at least a portion of a feeding path of the recording material, and a locking mechanism configured to lock the guide member being in the first position. The locking mechanism releases locking with sliding movement of the guiding member in a direction of the axis.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: November 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tempei Okanemasa
  • Patent number: 9989910
    Abstract: The present invention is directed to downsize the main body and achieve a good image quality at a low cost. A rotation shaft of a first discharge roller is tilted with respect to that of a second discharge roller. The center of oscillation C of a first discharge roller holding member is provided more upstream in the direction in which a sheet is discharged than a straight line made by the rotation center of the first discharge roller and the rotation center of the second discharge roller.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: June 5, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keisuke Fujita
  • Patent number: 9971285
    Abstract: Provided is an image forming apparatus including a fixing member that transports a recording medium on which an image is transferred while nipping the recording medium to fix the image to the recording medium, a discharge member that discharges the recording medium by rotating forwardly, a guide member that guides the recording medium to a reverse transport path in which a front surface and a rear surface of the recording medium are reversed by coming in contact with the recording medium transported by the discharge member that reversely rotates, and a waving member that is disposed at a downstream side of the fixing member in the transport direction of the recording medium, and waves the recording medium transported by the fixing member in a width direction of the recording medium.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: May 15, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Koji Okabe, Shigeru Watanabe
  • Patent number: 9927750
    Abstract: An electrophotographic image forming apparatus, including: a fixing device including a heater and a presser; a discharge-roller unit including a first frame and a discharge roller pair; and an arm supporting the heater or the presser, wherein, when the first frame is located at a first position, a nip position of the discharge roller pair is located at a first nip position and the arm supports the heater or the presser at a first press-contact position such that the heater and the presser are held in pressing contact at a predetermined pressure, and wherein, when the first frame is located at a second position, the nip position is located at a second nip position shifted from the first nip position and the arm supports the heater or the presser at a second press-contact position such that the heater and the presser are held in pressing contact at a lower pressure.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: March 27, 2018
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Raizo Kosaka
  • Patent number: 9857752
    Abstract: Disclosed is an image forming system, which makes it possible to effectively eject the jam-subsequent paper sheet remaining therein. In the system, a primary abnormal state in which the conveyance operation cannot be continued, and a secondary abnormal state in which an adverse influence is possibly incurred to the image formed on the paper sheet though it is possible to continue the conveyance operation, are defined. In the state that the primary abnormal state or the secondary abnormal state is detected in midcourse of the conveyance operation, when a pre-purge processing for conveying the jam-subsequent paper sheet is implemented so as to eject the jam-subsequent paper sheet onto the ejecting tray, controlling operations are conducted so as to continue the conveyance operation without halting the conveyance operation, even if the secondary abnormal state in respect to the jam-subsequent paper sheet is detected in midcourse of performing the pre-purge processing thereof.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: January 2, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Youichirou Nishi, Hiroyuki Konishi
  • Patent number: 9857741
    Abstract: An image forming apparatus includes a fixing device, an ejection device and a conveyance guide. The fixing device is configured to fix a toner image onto a sheet. The ejection device is configured to eject the sheet having fixed toner image by the fixing device. The conveyance guide is configured to guide the sheet along a conveyance path from the fixing device to the ejection device. The conveyance guide is provided with a plurality of main ribs formed along a sheet conveyance direction so as to be located inwardly by a predetermined length from both side edges of sheets of a plurality of sizes in a sheet width direction intersecting with the sheet conveyance direction. The conveyance guide is provided with a sub-rib formed to be lower than the main ribs arranged at a space where the interval between the main ribs is wider than a predetermined interval.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: January 2, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Atsuhiro Wakimoto
  • Patent number: 9760042
    Abstract: A heating device includes a heating member body having a surface that is configured to contact a continuous medium; plural heat sources that are arranged in a width direction of the continuous medium and that are configured to increase a temperature of the heating member body; an electric power circuit that is configured to supply electric power to the heat sources in accordance with a width of the continuous medium; a heat transfer member that is disposed so as to face the heat sources and that extends in the width direction of the continuous medium; and an overheat prevention device that is disposed in contact with the heat transfer member and that is configured to stop supply of electric power from the electric power circuit if a temperature of the heat transfer member exceeds a predetermined temperature.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: September 12, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Toshinori Sasaki, Koichi Kimura, Mizuki Sugino, Mitsutoshi Hongo
  • Patent number: 9703239
    Abstract: A fixing device includes a heater, a heating rotary member, a pressure rotary member, and a guide member. The heating rotary member is rotated while being heated by the heater. The pressure rotary member is in pressure contact with part of an outer circumferential surface of the heating rotary member so as to be rotated and so as to form a pressure contact portion which allows a recording medium to pass therethrough. The guide member has a guide portion which guides a leading end of the recording medium toward part of the outer circumferential surface of the heating rotary member. The guide portion has a guide ending portion having a central portion and left and right end portions in a direction parallel to a rotational axis direction of the heating rotary member. The central portion is recessed relative to the left and right end portions.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: July 11, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Akira Shimodaira
  • Patent number: 9696652
    Abstract: An electrophotographic image forming apparatus has a developing roller, wherein a glossiness of a surface of the developing roller is in a range of about 4 to about 15, the developing roller includes a plurality of protruding beads, a number average distance (Rsm) between the protruding beads is in a range of about 200 ?m to about 400 ?m, a supplying roller includes a plurality of foam cells, a number average size of the foam cells is in a range of about 300 ?m to about 500 ?m, and the developing roller is arranged to rotate at a rotation linear velocity that is about 120% to about 150% of a rotation linear velocity of a photoreceptor.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: July 4, 2017
    Assignee: S-PRINTING SOLUTION CO., LTD.
    Inventor: Tae-hyun Kim
  • Patent number: 9671733
    Abstract: A fixing device and An image forming apparatus include: a first pressure roller having an elastic layer in a surface layer section; a fixing belt wound on the elastic layer of the first pressure roller; a second pressure roller that presses the elastic layer of the first pressure roller via the fixing belt, the second pressure roller forming a fixing nip portion between the fixing belt and the second pressure roller; and a guide member that guides the fixing belt in such a manner as to separate the fixing belt from a protruding portion of the elastic layer, the protruding portion being formed on an entrance side of the fixing nip portion in a sheet conveying direction.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: June 6, 2017
    Assignee: KONICA MINOLTA, INC
    Inventors: Asahi Ebe, Toshihiro Wazumi, Makoto Ui, Tomoyuki Hayakawa, Akihiko Ooishi
  • Patent number: 9581945
    Abstract: A fixing exit guide plate for use in a fixing device, which supports the conveyance of a paper while being curved in a direction opposite to a curl direction of the paper in a paper conveyance path downstream of conveyance support rollers, includes a conveyance downstream portion having a paper conveyance plane and a conveyance upstream portion having a paper conveyance plane, wherein the fixing exit guide plate is retracted in a paper jam process to move such that the paper conveyance plane of the conveyance downstream portion rotates about a rotation axis of the conveyance support driving roller to be substantially parallel to the paper conveyance plane of a conveyance upstream portion.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: February 28, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Haruyuki Honda, Ryuuichi Mimbu, Yoshio Hattori, Yoshiki Yamaguchi, Toshihiko Shimokawa
  • Patent number: 9541866
    Abstract: A fixing device includes a heating member, a pressure member, and a conveyance guide. The heating member internally includes a heating element. The pressure member includes an elastic layer located to be pressed against the heating member to ensure a fixing nip area between the heating member and the pressure member. The conveyance guide is located upstream with respect to the fixing nip area in a conveying path of a sheet on which the toner image is formed, and assists the sheet to run. The conveyance guide includes a first guiding portion that guides a head of the sheet to a distal end position close to the heating member and a second guiding portion that guides a tail of the sheet from the distal end position to an intermediate position between the heating member and the pressure member.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: January 10, 2017
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Yuzo Onishi
  • Patent number: 9513588
    Abstract: An image forming apparatus includes a curved conveyance path being formed by an outer guide and an inner guide, and a control unit configured to control a first conveyance unit disposed on upstream of the conveyance path and a second conveyance unit disposed on downstream of the conveyance path such that a conveyance speed of the first conveyance unit is set greater than a conveyance speed of the second conveyance unit, in a case where an image surface of the recording material on which an image is formed faces the inner guide, and perform control of the first and the second conveyance units in such a manner that the conveyance speed of the first conveyance unit is set less than the conveyance speed of the second conveyance unit, in a case where the image surface of the recording material on which the image is formed faces the outer guide.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: December 6, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoichi Furuyama
  • Patent number: 9488939
    Abstract: A fixing device has a fixing member, a guide member, and a blowing member. The guide member is pivotable to be located selectively either in a first position where it guides a recording medium to a fixing nip and a second position where it shuts a recording medium transport passage. When the fixing member is driven to rotate, the guide member is located in the first position to guide air blown from the blowing member to opposite ends of the fixing member. When the fixing member is not driven to rotate, the guide member is located in the second position to let air blown from the blowing member pass between the guide member and the fixing member.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: November 8, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yuzo Onishi
  • Patent number: 9304458
    Abstract: An image forming apparatus includes an image bearing member; a transfer unit for transferring a toner image from the image bearing member onto the recording material; a fixing unit for fixing the toner image on the recording material; an electroconductive member contactable to the recording material; a resistance element connected with the electroconductive member; and a capacitor element connected with the electroconductive member. The electroconductive member is disposed so as to be nipped simultaneously by the transfer nip and the fixing nip and so as to be contacted by the recording material, and the electroconductive member and the capacitor element are connected in parallel between the electroconductive member and a ground potential.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: April 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Hara, Tomoo Akizuki, Masahiko Suzumi
  • Patent number: 9274487
    Abstract: To prevent a flap of an envelope from sticking to an envelope main body, an image forming apparatus includes: an image forming portion forming a toner image on the envelope; a fixing device fixing the toner image onto the envelope by heating the envelope while conveying the envelope on which the toner image is formed by the image forming portion; and a conveying roller pair that rotates while nipping the envelope, onto which the toner image is fixed by the fixing device, to convey the envelope. A driven roller of the conveying roller pair includes driven runners divided in a rotary shaft center direction, and one driven runner located at one end is inclined in a direction separating from another driven runner so that an outer peripheral surface of the one driven runner is brought into contact with a corner portion of a rubber roller.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: March 1, 2016
    Assignee: Canon Finetech Inc.
    Inventor: Takahiro Ohnishi
  • Patent number: 9207628
    Abstract: An image forming apparatus includes a casing, an image-forming unit, a circuit board for controlling operations of the image-forming unit, a receiving unit for receiving liquid entering into the casing. The casing includes: a wall portion constituting a top surface and positioned upward of the image-forming unit; a first frame supporting the circuit board; and a second frame opposing the first frame in an orthogonal direction orthogonal to a vertical direction. The wall portion includes a first member and a second member positioned adjacent to each other to provide a first gap therebetween. The image-forming unit is disposed between the first frame and the second frame. The receiving unit is positioned below the first gap and includes a receiving wall for receiving the liquid entering into the casing through the first gap, the receiving wall being slanted downward toward the second frame.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: December 8, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Takashi Hoshino, Yuji Takenoshita
  • Patent number: 9201356
    Abstract: A fixing device for fixing processing to fix a developer to a medium where the developer is transferred onto the medium, according to the invention, includes: a fixing processing unit for the fixing processing of the medium fed from an upstream side in a medium conveyance direction; a medium guide unit for guiding the medium fed from the upstream side in a medium conveyance direction, to the fixing processing unit; and a conductive member having a relatively high conductivity, being connected to a ground level, and contacting to the medium guide unit.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: December 1, 2015
    Assignee: Oki Data Corporation
    Inventor: Kentaro Honda
  • Patent number: 9201396
    Abstract: High-temperature heat generated from a fixing device is efficiently discharged to an outside an apparatus. A printer includes: a photosensitive drum; a transfer roller; a fixing device; and a duct frame that is mounted between two side plates disposed to oppose each other and disposed right over the fixing device with a lower surface opened. An upper inner surface of the duct frame is inclined in a short-edge direction of the duct frame, and an inclined upper end portion of the upper inner surface is provided with an aperture portion that discharges heat generated from the fixing device to an outside of the duct frame.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: December 1, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masakazu Uehara
  • Patent number: 9158245
    Abstract: A medium transporting apparatus includes a first transporting section and first guide. The first transporting section transports a medium. The first guide guides the medium transported by the transporting section, and is disposed downstream of the first transporting section with respect to a first direction in which the medium is transported. The first guide includes a first guide portion and a second guide portion. The first guide portion extends in the first direction. The second guide portion extends in a second direction substantially perpendicular to the first direction.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: October 13, 2015
    Assignee: OKI DATA CORPORATION
    Inventors: Masato Sakai, Teruaki Kuroda, Keita Ishimori
  • Patent number: 9141045
    Abstract: A fixing device includes a fixing member, a pressing member and a separating member. The fixing member is provided with a sheet passing region and a non-sheet passing region. The separating member has a separating plate and a restricting piece. The restricting piece is provided with a curving surface on a region including the contacting portion with the non-sheet passing region. The curving surface has a first curving area and a second curving area. The first curving area is provided on a downstream side from the contacting portion in a rotating direction of the fixing member. The second curving area is provided on an upstream side from the contacting portion in the rotating direction of the fixing member. The second curving area has a radius of curvature larger than that of the first curving area.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: September 22, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Shinobu Ohata, Mitsutoshi Takemoto, Koshiro Tomimori, Eiji Nakajima, Tomohiko Yamakawa, Naoto Miyakoshi, Akihiro Yamaguchi, Ryo Matsuyama
  • Patent number: 9122220
    Abstract: A printing apparatus includes a controller that, upon receipt of a printing suspension instruction during printing on a print medium by a printing device, causes a conveyor to stop a conveyance of the print medium from an upstream side to a downstream side after printing a mark on the print medium, causes the conveyor to convey the print medium from the downstream side to the upstream side, then to stop the conveyance of the print medium after a sensor detects the mark printed on the print medium, and upon receipt of a printing restart instruction, causes the conveyor to convey the print medium from a returned position where the print medium is stopped to the downstream side and controls a timing of a printing based on a detection of the mark by the sensor.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: September 1, 2015
    Assignees: CASIO ELECTRONICS MANUFACTURING CO., LTD., CASIO COMPUTER CO., LTD.
    Inventor: Toshihiko Numazu
  • Patent number: 9081337
    Abstract: A fixing device includes a fixing member, a pressure member, and a guiding member. The guiding member includes a first guide surface, a second guide surface, and a pair of third guide surfaces consecutively installing both end portions in the axial direction of the first guide surface and both end portions in the axial direction of the second guide surface. The first end edge of the first guide surface has a first circular arc shape arranged such that a center portion in the axial direction projects toward the downstream side in the rotation direction with respect to both end portions in the axial direction. The second guide surface is one of a curved surface in a second circular arc shape arranged such that a center portion in the axial direction is close to the first circumference surface with respect to both end portions in the axial direction.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: July 14, 2015
    Assignee: Kyocera Document Solutions Inc.
    Inventors: Kuniaki Nakano, Yuuya Shimohora
  • Patent number: 9074320
    Abstract: A sheet manufacturing apparatus includes a web forming unit configured to form a web which includes fibers and resin, and a first pressurizing unit and a second pressurizing unit configured to pressurize the web. The first pressurizing unit has a separation layer, is positioned on an upstream side of the second pressurizing unit in a transfer direction of the web, and is configured to heat the web. The second pressurizing unit is positioned on a downstream side of the first pressurizing unit in the transfer direction of the web, does not have a separation layer, and is configured not to heat the web. The pressurizing force from the first pressurizing unit is smaller than the pressurizing force from the second pressurizing unit.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: July 7, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Katsuhito Gomi
  • Patent number: 9046857
    Abstract: A fixing device includes a pair of fixing members that contact each other and that rotate or circulate, and that heat and press a sheet that is transported with a toner image being carried thereby and that is interposed between the fixing members, to fix the toner image to the sheet; and a guide member that guides to a fixing area the sheet that is transported towards the fixing members. The guide member includes a metallic member and resin members. The metallic member has a guide surface that faces the sheet that is transported towards the guide member. The resin members are disposed at the guide surface so as to be spaced apart from each other in a widthwise direction. The resin members protrude from the guide surface and are struck by a front edge of the sheet in the transport direction of the sheet.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: June 2, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kiichiro Arikawa, Hiroko Furukata, Masahiro Ishino, Junichi Uchiyama
  • 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: 20150117919
    Abstract: An image forming apparatus comprising a drum for carrying a toner image; a transfer member for contacting the drum to form a transfer nip, the transfer member being capable of electrostatically transferring the toner image from the drum onto a sheet; a fixing unit provided, downstream of the transfer member with respect to a sheet feeding direction, for fixing the toner image on the sheet by a fixing nip; a first current path provided between the fixing nip and a ground potential; a feeding unit, provided downstream of the fixing unit, for feeding the sheet while nipping by a feeding nip; a guiding member, disposed downstream of the feeding unit, for feeding the sheet passing through the transfer nip; and a second current path provided between the feeding nip and the ground potential, the second path having an electric resistance which is lower than that of the first path.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 30, 2015
    Inventor: Hiroki TAKAYANAGI
  • Publication number: 20150110524
    Abstract: Provided is a fixing device including a fixing member that fixes toner onto a recording material, a pressurizing member that forms a nip portion, through which the recording material passes, between the fixing member and the pressurizing member, a moving member that is disposed to be movable in response to passage of the recording material in a transport path of the recording material which passes through the nip portion, a detection unit that detects a presence or absence of the moving member, a displacement mechanism that changes a position of the pressurizing member with respect to the fixing member, and an attachment/detachment member that is disposed in a detachable manner at a facing position facing the displacement mechanism and comes into contact with the moving member.
    Type: Application
    Filed: May 8, 2014
    Publication date: April 23, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hideki SATO, Shigeyuki MARUHASHI, Jun SAWAMURA, Yasuhiro KATO, Kensuke AINAI
  • Publication number: 20150093142
    Abstract: An image forming apparatus includes a fixing unit, a housing having a sheet ejection opening, a plurality of sheet ejection rollers disposed in the sheet ejection opening and configured to eject the sheet fed from the fixing unit to the outside of the housing, a heat generating member spaced apart from the fixing unit and configured to generate heat, and a first guide member. The first guide member is disposed above the heat generating member, and configured to guide the sheet fed from the fixing unit to the ejection rollers. The first guide member includes a base portion having a plurality of outlet ports, and a plurality of ribs protruding upward from the base portion. The outlet ports are disposed between each pair of adjacent ones of the ribs and positioned closer to a downstream end of the first guide member than to an upstream end thereof.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 2, 2015
    Inventors: Hidekazu Nogami, Shogo Mori
  • Publication number: 20150093160
    Abstract: An image forming apparatus having a compact size includes a printing medium supplying unit to hold printing media and to supply a printing medium, an image forming unit disposed above the printing medium supplying unit to form images on a printing medium, and a printing medium feeding part substantially formed in a letter “C” shape, having a part which extends to the image forming unit and which is inclined in a downward direction along a printing medium moving direction to feed the printing medium from the printing medium supplying unit to the image forming unit
    Type: Application
    Filed: December 9, 2014
    Publication date: April 2, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Dong-ha CHOI
  • Publication number: 20150093159
    Abstract: A fixing device includes: a heating unit; a rotatable body; an urging mechanism; first and second bearings; a frame; first and second positioning members. The first and second bearings support first and second axial end portions of the rotatable body, respectively. The frame supports the heating unit and has two side walls. One of the side walls supports the first bearing, and the other supports the second bearing. Each side wall includes: a first wall portion supporting the first or second bearing; and second and third wall portions supporting the heating unit while interposing the heating unit therebetween. The first and second positioning members extend from the heating unit toward the first and second bearings, respectively. The heating unit is fixed in position relative to the first and second bearings upon engagement of the first and second positioning members with the first and second bearings, respectively.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 2, 2015
    Inventor: Takuji Matsuno
  • Publication number: 20150086250
    Abstract: An image forming apparatus includes an image bearing member; a transfer unit for transferring a toner image from the image bearing member onto the recording material; a fixing unit for fixing the toner image on the recording material; an electroconductive member contactable to the recording material; a resistance element connected with the electroconductive member; and a capacitor element connected with the electroconductive member, wherein the electroconductive member is disposed so as to be nipped simultaneously by the transfer nip and the fixing nip and so as to be contacted by the recording material, and the electroconductive member and the capacitor element are connected in parallel between the electroconductive member and a ground potential.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 26, 2015
    Inventors: Jun Hara, Tomoo Akizuki, Masahiko Suzumi
  • Publication number: 20150086252
    Abstract: An image forming apparatus capable of effectively cooling down a sheet having been subjected to fixing processing while preventing an apparatus from becoming larger in size and a sheet conveyance failure from occurring is provided. The image forming apparatus (10) includes a sheet conveyance path (16), a fixing device (22), a conveyance roller (26), an upper sheet guide (60), a lower sheet guide (62), and a cooling fan (40). The conveyance roller (26) is disposed downstream of a heat-treatment portion in the sheet conveyance path and configured so as to convey a sheet passing the heat-treatment portion to the paper output tray. At a position corresponding to the position of the conveyance rollers (26), the upper sheet guide (60) is provided with a ventilation portion (604) configured so as to make the cooling air from the cooling device (40) pass through.
    Type: Application
    Filed: December 1, 2014
    Publication date: March 26, 2015
    Inventor: Junya MASUDA
  • Publication number: 20150086251
    Abstract: An image forming apparatus includes: a toner image forming unit; an intermediary transfer belt; a transfer roller; a fixing device including a first belt stretched by a first roller and a first stretching roller and a second belt stretched by a second roller and a second stretching roller spaced from the first stretching roller; and a guiding member. The guiding member is provided downstream of a transfer portion and upstream of the fixing device with respect to a recording material feeding direction. The guiding member is disposed, at a downstream end thereof, in a nip side relative to an upstream common tangential line of the first and second stretching rollers with respect to the feeding direction and is disposed at a position closer to the second stretching roller than to the first stretching roller on the upstream common tangential line. The guiding member includes a flat plate-like electrode.
    Type: Application
    Filed: September 22, 2014
    Publication date: March 26, 2015
    Inventor: Hiroki Takayanagi
  • Patent number: 8977154
    Abstract: An image forming device comprising a fixing unit for thermally fixing a developer on a recording sheet, a control unit that controls the temperature to maintain the fixing unit at one of a fixing temperature and a stand-by temperature lower than the fixing temperature, and a transport unit that transports the recording sheet to the fixing unit, wherein, when the temperature of the fixing unit has dropped from the fixing temperature to the stand-by temperature, and a printing command is received, the control unit controls the transport unit so as to set a stand-by time to wait before starting to transport the recording sheet after the printing command is received as a second time interval, which is longer than a first time interval of time required for the temperature of the fixing unit to reach the fixing temperature based on information relating to the current temperature of the fixing unit.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: March 10, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Kenji Takeuchi, Takuji Matsuno
  • Patent number: 8977173
    Abstract: A fixing apparatus includes a fixing unit configured to heat and fix an unfixed image, which is formed on a recording material, on the recording material, a rotating member provided with a metal shaft and configured to convey the recording material that has passed through the fixing unit, a cover member made of injection-molded resin and configured to cover the shaft of the rotating member from a recording material conveyance path side so that a portion of the rotating member in contact with the recording material is exposed, the cover member including a portion that has a U-shaped cross-section when viewed from one end side of the shaft, and a sheet member configured to cover an opening of the U-shaped portion of the cover member.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: March 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideyuki Matsubara, Masato Suzuki
  • Publication number: 20150063881
    Abstract: A fixing device includes a fixing member, a pressure member, and a guiding member. The guiding member includes a first guide surface, a second guide surface, and a pair of third guide surfaces consecutively installing both end portions in the axial direction of the first guide surface and both end portions in the axial direction of the second guide surface. The first end edge of the first guide surface has a first circular arc shape arranged such that a center portion in the axial direction projects toward the downstream side in the rotation direction with respect to both end portions in the axial direction. The second guide surface is one of a curved surface in a second circular arc shape arranged such that a center portion in the axial direction is close to the first circumference surface with respect to both end portions in the axial direction.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 5, 2015
    Inventors: Kuniaki Nakano, Yuuya Shimohora
  • Patent number: 8965258
    Abstract: A fixing device includes a pair of fixing members and a guide member. The guide member includes a guide plate having a guide surface, a back surface when the guide surface is defined as a front surface, and holes that are spaced apart from each other in a widthwise direction of the sheet and that extend through the guide surface and the back surface; and sheet receiving members that are disposed in correspondence with the holes, each sheet receiving member including a body and an insertion portion that protrudes from the body and that is inserted into the corresponding hole, the insertion portions being inserted into the corresponding holes and being moved along the guide surface, so that the sheet receiving members are mounted to the guide plate while the bodies protrude from the guide surface.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: February 24, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroko Furukata, Kiichiro Arikawa, Masahiro Ishino, Junichi Uchiyama
  • Patent number: 8942608
    Abstract: The print performance of an image forming apparatus is improved by adequately estimating the behavior of a sheet receiving separation air and controlling the output of separation air. A fixing control unit 50 controls a shutter drive unit 52 defining the flow passage area on the basis of the displacement detected of the separation claw 42 to control the output of separation air. Since the sheet receiving separation air exerts a force on the separation claw 42, it is possible to estimate whether or not the behavior of the sheet is appropriate by monitoring the displacement of the separation claw 42. While different types of paper may move in different ways, the influence of separation air is dominant in the behavior of a sheet which is conveyed, and therefore the sheet can be prevented from moving in an inappropriate condition by controlling the output of separation air.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: January 27, 2015
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kenji Tsuru, Yoshito Hashimura
  • Publication number: 20140376976
    Abstract: The present invention provides an image forming apparatus in which a recording paper to which a toner has been transferred is guided by a guide member and transported to a nip region between two rotatable members that are pressed against each other, and the toner on the recording paper is fixed at the nip region. In this image forming apparatus, a conductive or semiconductive region and an insulating region that are to be brought into contact with the recording paper are sequentially arranged in a recording paper transport direction on a guide face of the guide member, the conductive or semiconductive region is grounded, and the insulating region includes an end portion of the guide member oriented in the recording paper transport direction.
    Type: Application
    Filed: September 5, 2014
    Publication date: December 25, 2014
    Inventors: Kousuke NAMISAKI, Kohichi Yamauchi, Takashi Yamanaka
  • Patent number: 8918045
    Abstract: An image glossing apparatus including a recording sheet feeder feeding a recording sheet bearing a toner image; a glossing device including a heater heating a glossing portion of the toner image to gloss the portion; a glossiness information obtaining device obtaining position information on the position of the glossing portion; and a position detector including a tip detector detecting tip of the fed recording sheet, and a distance measuring device measuring the moving distance of the recording sheet after the tip of the recording sheet is detected. The position detector detects the position of a portion of the recording sheet facing the heater based on the information on the tip of the recording sheet and the information on the moving distance of the recording sheet. When the portion of the recording sheet facing the heater is the glossing portion, the heater heats the portion to gloss the glossing portion.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: December 23, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoichi Sakurai, Shinya Kobayashi, Tadashi Kasai, Masakazu Terao, Yoshihiro Sonohara
  • Patent number: 8918038
    Abstract: A fixing device includes a fixing unit and a gloss equalizing unit. The fixing unit is disposed in a media conveyance path to fix a toner image on a recording medium conveyed therethrough. The fixing unit includes a rotary fuser member, a rotary pressure member, and a media stripper. The fuser member is subjected to heating. The rotary pressure member is pressed against the fuser member to form a fixing nip therebetween. The media stripper is held in contact with the pressure member to allow the recording medium to separate from the pressure member. The gloss equalizing unit is disposed downstream from the fixing unit along the media conveyance path. The gloss equalizing unit includes a pair of first and second rotary glossing rollers, at least one of which is heated and at least one of which is pressed against the other to form a gloss equalizing nip therebetween.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: December 23, 2014
    Assignee: Ricoh Company, Ltd.
    Inventor: Yasutada Tsukioka
  • Publication number: 20140363184
    Abstract: An image forming apparatus, including: electrostatic latent image bearing member; electrostatic latent image forming unit; developing unit configured to develop with toner to form visible image; transferring unit; fixing unit; and discharging unit, the toner containing binder resin, colorant, and releasing agent, the binder resin containing crystalline resin containing urethane or urea bond, or both, the toner satisfying: C/(C+A)?0.15, C being integrated intensity of part of spectrum derived from crystalline structure of the binder resin, A being integrated intensity of part of the spectrum derived from non-crystalline structure, the spectrum being diffraction spectrum of the toner as obtained by X-ray diffraction spectroscopy, storage elastic modulus G?(70) of the toner at 70° C. being 5.0×104 Pa?G?(70)?1.0×106 Pa, and storage elastic modulus G?(160) thereof at 160° C. being 1.0×103 Pa?G?(160)?1.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 11, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hideyuki Santo, Yukiko Iwasaki, Takamasa Hase
  • Patent number: 8886104
    Abstract: A fixing apparatus includes a fixing drum having a heating heater internally equipped therein, the fixing drum positioned spaced part and downstream from a sheet delivery site at a downstream-most side of printing units and is adapted to rotate at a peripheral speed identical to a speed of travel of the sheet of paper. A first sprocket is positioned adjoining the sheet delivery site at the downstream-most side of the printing units, and a second sprocket is positioned coaxially with the fixing drum and being adapted to rotate integrally with the fixing drum. A conveyer chain having a gripper is wound around and engaging with the first and second sprockets to wind and convey a sheet of paper on a peripheral surface of the fixing drum upon gripping in turn with the gripper the sheet of paper traveling from the sheet delivery site at the downstream-most side.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: November 11, 2014
    Assignee: Miyakoshi Printing Machinery Co., Ltd.
    Inventors: Hideo Izawa, Junichi Setoyama, Kenji Takahashi, Masaru Kusanagi
  • Publication number: 20140328609
    Abstract: An image forming apparatus with a duplex printing function may include a closeable and openable portion. In one example, the portion may correspond to a cover of the image forming apparatus. The cover may include guiding portions configured to define a return path for duplex printing. In another example, the portion may correspond to a document reading unit including an outer casing. A portion of the outer casing may be configured to guide a recording sheet that is conveyed out of a housing of the image forming apparatus by a switchback roller. In one example, the switchback roller may convey a recording sheet to a position above an upper surface of the outer casing.
    Type: Application
    Filed: July 18, 2014
    Publication date: November 6, 2014
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 8879940
    Abstract: An image forming apparatus includes an adjustment unit that adjusts an image transfer position of the sheet of paper along a main scanning direction that is orthogonal to a transporting direction of the sheet of paper, a fixing unit that fixes on the sheet of paper an toner image using fixing rollers and performs a fluctuation of the fixing roller to the main scanning direction, a detection unit that detects whether or not the fixing rollers of the fixing unit nip the sheet of paper, and a controller. The controller controls the fixing unit to perform the fluctuation of the fixing rollers when determining that the fixing rollers of the fixing unit do not nip the sheet of paper based on a detection result of the detection unit.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: November 4, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Toru Kasamatsu, Takayuki Ueda, Yoshihito Sasamoto, Eiji Nishikawa, Satoshi Miyajima
  • Patent number: 8879934
    Abstract: An image forming apparatus, including: a fixing device configured to fix a toner image onto a sheet by heating the sheet having the toner image formed thereon; a wire-shaped guide configured to guide the sheet having the toner image fixed thereto; and a holder, configured to hold the wire-shaped guide, to which the wire-shaped guide is fixed by using elasticity of the wire-shaped guide.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiichiro Kameda, Kohei Koshida