Control Of Fixing Patents (Class 399/67)
  • Patent number: 10969719
    Abstract: A fixing device includes: a rotary body; a pressure body; a frame supporting the rotary body; and a pressure varying mechanism for providing a nip pressure to a nip region formed between the rotary body and the pressure body. The pressure varying mechanism includes a first spring and a second spring for urging one of the rotary body and the pressure body. The first spring applies a first urging force, and the second spring applies a second urging force acting in an opposite direction from the first urging force. The pressure varying mechanism can vary the nip pressure between a first nip pressure and a second nip pressure smaller than the first nip pressure. The nip pressure becomes the first nip pressure while only the first urging force is applied, and becomes the second nip pressure while both of the first urging force and the second urging force are applied.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: April 6, 2021
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Hiroshi Handa, Tokifumi Tanaka, Shuhei Fukue, Tomonori Watanabe
  • Patent number: 10962909
    Abstract: A heating device includes a belt, a heater that is in contact with an inner surface of the belt and divided into heater blocks in a width direction thereof, a pressing member that presses a sheet against the belt, a temperature sensor disposed on each of a number of the heater blocks that is at least one-half of the total number thereof, and a processor configured to select one or more of the heater blocks based on a width of the sheet, and select one or more temperature sensors disposed on one or more of the selected heater blocks having the non-paper passing region and control electric power supplied to said one or more of the selected heater blocks to protect against an excessive temperature rise in the non-paper passing region based on temperatures detected by the temperature sensors.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: March 30, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Chie Miyauchi, Osamu Takagi, Ryota Saeki
  • Patent number: 10915048
    Abstract: A heater includes a plurality of resistive heat generators electrically connected to each other in parallel. A power supply supplies power to the resistive heat generators. An electric current detector detects an electric current that flows through the resistive heat generators. A voltage detector detects a voltage applied to the resistive heat generators. An electric current controller controls the electric current that flows through the resistive heat generators based on the electric current detected by the electric current detector and the voltage detected by the voltage detector. The electric current detector detects the electric current in a state in which, after the power supply starts supplying the power to the resistive heat generators, a waveform of an alternating current supplied to the resistive heat generators remains constant for a predetermined time period or longer taken for the electric current detector to detect the electric current.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: February 9, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoya Adachi, Yuusuke Furuichi, Yukimichi Someya
  • Patent number: 10890867
    Abstract: An image forming apparatus includes an image former which forms an image on a recording medium, a pressure member, a fixing member which is pressed against the pressure member to form a nip portion and comes into contact with the image formed on the recording medium conveyed at the nip portion, and a hardware processor. The hardware processor causes one member, either the pressure member or the fixing member, to function as a driving member which conveys the recording medium in a normal mode and causes the other member of the pressure member and the fixing member to perform an assist operation for reducing torque of the driving member compared to the normal mode to increase gloss of the image in a high-gloss mode.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: January 12, 2021
    Assignee: KONICA MINOLTA, INC.
    Inventor: Dai Suwama
  • Patent number: 10877410
    Abstract: A heating apparatus includes a cylindrical film, a pressing roller capable of pressing and rotating the cylindrical film to convey a medium through a nip formed between the cylindrical film and the pressing roller, a plurality of heating elements arranged inside the cylindrical film along a longitudinal direction thereof, wherein the heating elements are arranged closer to an upstream end of the nip than a downstream end of the nip, and a guide member arranged inside the cylindrical film and including a first end portion. The first end portion contacts the cylindrical film on a downstream side with respect to the upstream end of the nip.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: December 29, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Kazuhiko Kikuchi
  • Patent number: 10838327
    Abstract: An image heating apparatus includes an endless belt in contact with a toner image on a recording material, a separation member that separates the recording material from the endless belt, a regulation member that regulates a longitudinal position of the endless belt, and an interlocking mechanism. The interlocking mechanism interlocks a movement of an end portion of the separation member on the same side as a first edge of the endless belt with movement of the regulation member. The interlocking mechanism performs interlocking so that, when the regulation member moves toward an upstream in a conveyance direction, the end portion of the separation member moves toward the upstream in the conveyance direction.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: November 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuo Yasui
  • Patent number: 10802424
    Abstract: A fixing device includes a heating unit, a pressure unit, a moving unit, and a controller. The heating unit is configured to heat a toner on a recording medium. The pressure unit is configured to transport the recording medium while sandwiching the recording medium in a nip that the pressure unit and the heating unit form. The moving unit is configured to change a nip state of the pressure unit with respect to the heating unit by moving the heating unit or the pressure unit. The controller is configured to, when plural recording media are transported continuously, control the moving unit so that the moving unit moves the heating unit or the pressure unit in a separation direction so as to reduce a nip width at a recording medium interval between the recording media.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: October 13, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Noriyuki Miyoshi, Yuhei Tomita, Kazuma Teranishi
  • Patent number: 10788774
    Abstract: A fixing device includes: a fixing element; a heat source heating the fixing element; a press roller pressed against the fixing element, to form with the fixing element a nip region where a recording sheet passes; a driver device rotating the press roller; and a controller controlling the heat source to set a temperature of the fixing element to a predetermined target temperature, and controlling the driver device to set a rotation speed of the press roller to a predetermined target rotation speed. The controller determines the target rotation speed by adding a correction value to a normal rotation speed, based on the temperature of the fixing element at start of job, a type of the recording sheet, ambient temperature, and elapsed time from start of paper feed, and sets the rotation speed of the press roller to the target rotation speed.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: September 29, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Takehiro Sato
  • Patent number: 10782631
    Abstract: Provided is an image forming apparatus capable of preventing or suppressing occurrence of density unevenness even when a shearing force is applied between an image face on paper and a fixing belt. The image forming apparatus includes an image former, a fixer, and a controller. The image former forms a toner image constituted by a plurality of dots each containing a toner on paper. The fixer includes a fixing member moving at a first velocity and a pressure member forming a fixing nip portion with the fixing member and moving at a second velocity, and fixes the toner image on the paper at the fixing nip portion. When the first velocity and the second velocity at the fixing nip portion are different, the controller determines a toner amount to be attached to paper so as to make a toner amount distribution different in each of the dots before fixing.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: September 22, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masahiro Onodera
  • Patent number: 10768560
    Abstract: An image forming apparatus, including: a determining portion to acquire a density value for respective colors of toners, obtain a sum value of the density values of the colors of the toners, obtain a numerical value indicating the number of the density values being values larger than 0 out of the density values corresponding to the colors of the toners, and determine a target temperature on the basis of the sum value and the numerical value, wherein in a case the sum value is a first value and the numerical value is a first number, the determining portion determines a first temperature as the target temperature, in a case the sum value is the first value and the numerical value is a second number that is larger than the first number, the determining portion determines a second temperature that is lower than the first temperature as the target temperature.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: September 8, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Takagi, Daizo Fukuzawa
  • Patent number: 10761466
    Abstract: A fixing device includes: a fixing member that heats a toner image formed on a recording sheet in order to fix the toner image on the recording sheet; a pressurizing member that nips the recording sheet together with the fixing member to pressurize the toner image on the recording sheet; a heater that heats the pressurizing member; and a hardware processor that controls a heating temperature of the pressurizing member by the heater, wherein the hardware processor acquires setting of glossiness of the toner image and controls the heating temperature to be higher as the glossiness in the setting is lower.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: September 1, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Chiaki Yamada, Naoki Yoshie, Hirofumi Nakagawa
  • Patent number: 10747142
    Abstract: Provided is an image forming apparatus capable of preventing or suppressing occurrence of density unevenness even when a shearing force is applied between an image face on paper and a fixing belt. The image forming apparatus includes an image former, a fixer, and a controller. The image former forms a toner image constituted by a plurality of dots each containing a toner on paper. The fixer includes a fixing member moving at a first velocity and a pressure member forming a fixing nip portion with the fixing member and moving at a second velocity, and fixes the toner image on the paper at the fixing nip portion. When the first velocity and the second velocity at the fixing nip portion are different, the controller determines a toner amount to be attached to paper so as to make a toner amount distribution different in each of the dots before fixing.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: August 18, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masahiro Onodera
  • Patent number: 10732550
    Abstract: A heating device includes an belt, a heater contacting the belt and divided into heater blocks, a pressing member pressing a sheet against the belt, a temperature sensor disposed on a number of the heater blocks being at least one-half of a total number of the blocks, and a processor configured to select heater blocks based on a width of the sheet, select first temperature sensors on the selected heater blocks not having a non-paper passing region and control electric power supplied to the heater blocks so that temperatures detected by the first sensors are within a predetermined range, and select second temperature sensors on the selected heater blocks having the non-paper passing region and control electric power supplied to the heater blocks having the non-paper passing region to protect against an excessive temperature rise in the non-paper passing region based on second temperatures detected by the second sensors.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: August 4, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Chie Miyauchi, Osamu Takagi, Ryota Saeki
  • Patent number: 10705443
    Abstract: An image forming apparatus includes an image forming component that forms an image on a recording medium by using a white color material and a color material other than the white color material, and a controller that controls a color material amount of the white color material to differ depending on a position where an image that uses the white color material is formed in order of formation of images that use respective color materials in the image forming component.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: July 7, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kaori Iwaki, Masahiko Kubo, Ayako Watanabe, Kaoru Yamauchi, Yosuke Tashiro
  • Patent number: 10691053
    Abstract: A pair of rotary members nips and conveys a recording material and a heating element heats a toner image on the recording material via the pair of rotary members. A separating mechanism separates the pair of rotary members. A heating time recording portion records a cumulative length of a period during which the pair of rotary members in an abutted state is heated as a first heating time and a cumulative length of the period during which the pair of rotary members in a separated state is heated as a second heating time. A determining portion determines a remaining lifetime of the pair of rotary members using the first and second heating times and data indicating a relationship between length of the period during which the pair of rotary members is heated and decrease in lifetime of the pair of rotary members.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: June 23, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeaki Takada, Daigo Matsuura, Masayuki Tamaki, Yasuharu Chiyoda, Masahiro Tsujibayashi
  • Patent number: 10663899
    Abstract: A fuser includes a heater, a presser, a support member that supports the presser to allow the presser to move between a nip position where the presser is in pressured contact with the heater, and a separated position where the presser is separated from the heater, a first spring, a first cam, a first gear, a second gear, a second spring, and a second cam. The second cam has a cam profile that, when the presser moves from the separated position to the nip position, causes the second gear to move in a direction along a second axis against urging force of the second spring to increase the urging force of the second spring.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: May 26, 2020
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shota Shinoya
  • Patent number: 10663892
    Abstract: A fixing device according to an embodiment includes an endless belt, a pressure element, a heating member, an adjustment mechanism, and a controller. The pressure element conveys and presses a sheet to the endless belt. The heating member is on the inner side of the belt and has a heat generating element for heating the belt. The adjustment mechanism moves the heating member or the pressure element to adjust the nip width between the heating member and the pressure element. The controller controls the adjustment mechanism so that A>B?N is satisfied, where A is the nip width during a fixing process in which a colored material is fixed to the sheet, B is the nip width during a heating process conducted before the fixing process, and N is the length of the heat generating element in the sheet conveyance direction.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: May 26, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kazuhiko Kikuchi, Osamu Takagi, Chie Miyauchi
  • Patent number: 10620572
    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: Grant
    Filed: August 23, 2018
    Date of Patent: April 14, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Chie Miyauchi, Osamu Takagi, Ryota Saeki
  • Patent number: 10578998
    Abstract: A fixing device includes an endless belt that rotates in a circumferential direction and that comes into contact with a recording medium, which is transported, at an outer peripheral surface of the endless belt, a heat generating plate that includes at least one heat generating portion and extends in an axial direction of the endless belt in such a manner that a surface of the heat generating plate is in contact with an inner peripheral surface of the endless belt, the heat generating portion being formed in such a manner as to extend in the axial direction and in such a manner as to generate heat, a heat conducting unit that is in contact with a rear surface of a portion of the heat generating plate, the portion being different from a portion of the heat generating plate on which the heat generating portion is formed in a transport direction of the recording medium, and that conducts heat generated by the heat generating portion in the axial direction, an urging unit that urges the heat conducting unit towar
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: March 3, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kiyoshi Koyanagi, Takaaki Sato, Toru Inoue
  • Patent number: 10564565
    Abstract: An image forming apparatus includes an image holding member, a charging unit that charges the surface of the image holding member, an electrostatic latent image forming unit that forms an electrostatic latent image on the charged surface of the image holding member, a developing unit that develops the electrostatic latent image to form a toner image, a transferring unit that transfers the toner image to a first side of a recording medium, a fixing unit that allows the recording medium having the transferred toner image to pass through a nipping region to fix the toner image, a first charging unit that faces the first side of the recording medium and that charges particles, and a second charging unit that charges a second side of the recording medium to the opposite polarity to the charged particles after the recording medium passes through the nipping region.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: February 18, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masataka Kuribayashi, Takafumi Koide, Katsuyuki Kitajima, Teppei Yawada, Shota Oshima
  • Patent number: 10564577
    Abstract: A fixing device fixes a toner image onto a recording material by applying heat and pressure to the toner image formed on the recording material at a nip provided in a conveyance path of the recording material, and includes: a heating source; a pressure roller and a pressure pad; and a sandwiching member, wherein the pressure pad includes a first main surface and a second main surface, and the first main surface is formed of a long plate-like member, the sandwiching member includes a long plate-like abutting part, and a width-direction center in an area included in the second main surface and corresponding to a recording material passing region provided in the nip bulges toward the abutting part side more than width-direction both ends of the area included in the second main surface and corresponding to the recording material passing region provided in the nip.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: February 18, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventor: Shinichi Yabuki
  • Patent number: 10545436
    Abstract: An image forming system comprises a sheet supply section configured to supply a sheet for printing. The system includes a registration roller configured to guide the sheet supplied from the sheet supply section along a conveyance path. A first image forming section is configured to form a first image on the sheet based on reference image information using a first colorant type that is capable of being fixed to the sheet by heat. A fixing section is configured to heat the sheet on which the first image has been formed. A second image forming section is configured to receive the sheet from the fixing section and form a second image using a second colorant type on the sheet after the sheet has been passed through the fixing section. A controller is configured to control a heating temperature of the fixing section in two or more stages.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: January 28, 2020
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventor: Takeshi Watanabe
  • Patent number: 10534300
    Abstract: An image forming apparatus includes a first toner image forming unit for forming first toner image on a transfer belt with a first toner and a second toner image forming unit for forming a second toner image on the transfer belt with a second toner. A secondary transfer unit transfers the first and second toner images from the transfer belt to a sheet traveling in a sheet transport direction. A fixing unit fixes the first and second toner images to the sheet. A control unit controls the first toner image forming unit to form a first pattern, the second toner image forming unit to form a second pattern, and to leaving a margin on a upstream side of the sheet in the sheet transport direction that is greater than or equal to a circumferential distance of a fixing element in the fixing unit.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: January 14, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Akitoshi Suzuki
  • Patent number: 10509339
    Abstract: An image forming apparatus includes an image forming section and a controller. The image forming section selectively forms a first toner image to be printed on transfer paper other than plain paper with use of a toner and forms a second toner image to be printed on the plain paper with use of the toner. The controller controls the image forming section and thereby makes a first area density of the toner in the first toner image and a second area density of the toner in the second toner image differ from each other.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: December 17, 2019
    Assignee: Oki Data Corporation
    Inventors: Yuichi Furukawa, Kohei Kigawa
  • Patent number: 10509349
    Abstract: A fixing device includes a first fixing section, a second fixing section, the first fixing section and the second fixing section forming a fixing nip therebetween, a nip width adjusting section capable of adjusting a nip width of the fixing nip, a rotation speed detecting section that detects a rotation speed of the second fixing section, and a hardware processor that controls the nip width adjusting section to make the nip width equal to a predetermined reference nip width.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: December 17, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kenji Izumiya, Takumi Shirakuma, Keigo Ogura, Hidenori Mine, Hirokatsu Kodama
  • Patent number: 10444682
    Abstract: A fixing device includes a first rotatable member, a second rotatable member, a heat generating member that heats the first rotatable member, and a temperature detecting member that detects a temperature of the heat generating member. A motor drives one of the first rotatable member and the second rotatable member. In addition, a controller controls the fixing device by causing the motor to rotate in a state in which a predetermined amount of electrical power is supplied to the heat generating member, and then, supply of the electrical power to the heat generating member is stopped. On the basis of a temperature lowering rate of a detected temperature of the temperature detecting member during rotation of said motor, the controller detects, after stopping supply of the electrical power to the heat generating member, a rotational state of the one of the first rotatable member and the second rotatable member.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: October 15, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Nakamoto, Takanori Mitani, Satoshi Nishida, Isamu Takeda, Masahito Omata, Yasuhito Minamishima
  • Patent number: 10444689
    Abstract: Disclosed is image forming apparatus, including a first roller and a second roller that conveys the recording sheet by sandwiching the recording sheet in a fixing process of an image forming; a pressing actuator that presses the first roller and the second roller against each other; an actuating motor that actuates the first roller; a brake that applies a brake force to the second roller; a rotation speed detector that detects a rotation speed of the second roller; and a hardware processor that judges a degradation of each surface roughness of the first roller and the second roller in accordance with the rotation speed of the second roller, which is detected when the first roller is actuated in a situation in which the first roller and the second roller are pressed against each other and when the brake applies a predetermined brake force to the second roller.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: October 15, 2019
    Assignee: Konica Minolta, Inc.
    Inventor: Satoshi Ogata
  • Patent number: 10444677
    Abstract: An image forming apparatus includes a fixing device, a driver, and a relay. A control board controls supply of power to a heater based on an output of a temperature detector. A connector includes a first connection portion to be connected to the fixing device, and a second connection portion to be connected to the control board, and connects the fixing device and the control board to each other. A loopback path is configured such that a direct current (DC) voltage to be applied, via a first terminal of the second connection portion, to a second terminal of the first connection portion is applied to a fourth terminal of the second connection portion via a third terminal of the first connection portion. Further, the DC voltage to be applied to the fourth terminal via the loopback path is applied to the relay as a drive voltage for the relay.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: October 15, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junji Ishikawa, Hiroki Uzawa
  • Patent number: 10416595
    Abstract: An image forming apparatus includes a control circuit having a plurality of semiconductor elements configured to perform switching between ON and OFF of a plurality of heat generating blocks, and a power interrupting unit configured to be activated so as to interrupt power being supplied to the plurality of semiconductor elements when a heater overheats. Of the plurality of semiconductor elements, a first semiconductor element to supply power to a first heat generating block, is connected, in series, to a second semiconductor element to supply power to a second heat generating block. In addition, when the power interrupting unit is not activated, the second heat generating block is controlled by controlling only the second semiconductor element, and, when the power interrupting unit is not activated, the first heat generating block is controlled by controlling the first semiconductor element and the second semiconductor element.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: September 17, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryota Ogura, Yuji Fujiwara, Yasuhiro Shimura
  • Patent number: 10365600
    Abstract: A belt deviation correction device for correcting a deviation of an endless belt wound around a plurality of rollers includes a pressing roller that is pressed from outside the endless belt wound around the plurality of rollers. The pressing roller is configured to swing in such a way as to be inclined with respect to the plurality of rollers. A deviation of the endless belt in a direction of an axis of rotation of the plurality of rollers is corrected by swinging the pressing roller.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: July 30, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Kimihide Tsukamoto
  • Patent number: 10353313
    Abstract: An image forming apparatus includes an image forming component that forms an image on a recording medium by using a white color material and a color material other than the white color material, and a controller that controls a color material amount of the white color material to differ depending on a position where an image that uses the white color material is formed in order of formation of images that use respective color materials in the image forming component.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: July 16, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kaori Iwaki, Masahiko Kubo, Ayako Watanabe, Kaoru Yamauchi, Yosuke Tashiro
  • Patent number: 10338503
    Abstract: A fixing apparatus including a rotary member in which a generatrix direction thereof is substantially parallel to a generatrix direction of a film, the rotary member being provided between the film and a cover member such that a gap is formed between the film and the rotary member.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: July 2, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masafumi Maeda, Masaki Tanaka
  • Patent number: 10300728
    Abstract: A heat roller 18 includes a roller body 25 and a halogen lamp 26, the roller body 25 is a hollow cylinder constituted of aluminum or an aluminum alloy, and a thermal conversion efficiency of light from the halogen lamp 26 is not less than 70%. A printing apparatus includes the heat roller 18 disposed at a downstream side in a conveyance direction of a conveyance path for a printing medium than a printing unit.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: May 28, 2019
    Assignee: SCREEN HOLDINGS CO., LTD.
    Inventors: Takaharu Yamamoto, Junichi Shimizu, Shinsuke Yamashita
  • Patent number: 10295945
    Abstract: An image forming apparatus according to an embodiment includes a fixing section that fixes a toner image formed on a sheet. A controller controls a preliminary rotation of the fixing section after execution of a first image forming job and before execution of a second image forming job. Conditions for the preliminary rotation include types of sheets used in the first image forming job and the second image forming job, respectively, and a number of sheets used in executing the first image forming job.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: May 21, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Hirotaka Matsumoto
  • Patent number: 10241454
    Abstract: An image forming apparatus includes: a first fixing member; a second fixing member; a holding member; a cam member; an urging member; a spring member; a drive source; a transmission section; a regulating member; and a controller. The cam member is rotatable about an axis in a first direction and a second direction opposite to the first direction. The spring member has one end portion movable in interlocking relation with the cam member and another end portion whose movement is regulated by the regulating member. The spring member suppresses rotation of the cam member in the first direction while storing a restoring force by the rotation of the cam member in the first direction; and facilitates rotation of the cam member in the second direction while releasing the restoring force by the rotation of the cam member in the second direction.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: March 26, 2019
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Shota Shinoya, Yasuhiro Suzuki
  • Patent number: 10228641
    Abstract: According to one embodiment, a fixing device includes determination means for determining a 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 transport direction 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 of these heat-generating members, 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 transport 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: March 12, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Osamu Takagi
  • Patent number: 10222728
    Abstract: A fixing device includes a heating body, a pressuring body, a lateral plate supporting the heating or pressuring body, a first supporting body supporting the heating or pressuring body, a second supporting body including a roller, a tensile spring between the first and second supporting bodies, an eccentric cam, a rotating shaft, a protrusion, a driving part, and a pressing member. The cam is supported between the first and second supporting bodies swingable in the lateral plate and has a depression gradually inclined from an upstream side to a downstream side in a rotation direction. The protrusion is protruded from the rotating shaft and meets the depression. The pressing member presses the cam opposite the protrusion. The cam rotates and meets the roller to shift the second supporting body and to extend and contract the spring, and changes a nip pressure from a first pressure to a lower second pressure.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: March 5, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Shota Onishi, Masuo Kawamoto
  • Patent number: 10209653
    Abstract: An image processing apparatus comprises a heat roller configured to heat a sheet with heat generated by a plurality of heat generating elements and a controller configured to control a current supplied to the heat generating elements from an AC power supply. The controller controls a timing at which the current flows or does not flow to the heat generating elements according to a first set of control parameters, such that a total of a first sum of estimated absolute value magnitudes of a positive polarity current flowing to the heat generating elements during one duty cycle and a second sum of estimated absolute value magnitudes of a negative polarity current flowing to the heat generating elements during the one duty cycle, is lower when the heat generating elements are controlled according to the first set relative when the heat generating elements are controlled according to other sets.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: February 19, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Hiroyuki Fuse
  • Patent number: 10197956
    Abstract: According to embodiments, an image forming apparatus includes a fixation member, a pressurization member, a heat source, a drive unit, a measurement unit, and a control unit. The measurement unit measures the time that elapses after the image forming apparatus ends image forming processing until the image forming apparatus receives an instruction to perform the next image forming processing. If the elapsed time does not exceed a predetermined threshold, the control unit causes the drive unit to start to drive the fixation member after a temperature of the fixation member reaches a first control temperature. If the elapsed time exceeds the predetermined threshold, the control unit causes the drive unit to start to drive the fixation member after the temperature of the fixation member reaches a second control temperature that is higher than the first control temperature.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: February 5, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Keiji Yuge
  • Patent number: 10185275
    Abstract: An image forming apparatus comprises an image forming section; a fixing device; an input section; a storage section which stores a target temperature of the fixing device in a case of carrying out the fixing processing and a target temperature of the fixing device in a case of carrying out the erasing processing; and a control section which controls to read out lower one of the target temperature of the fixation and the target temperature of the erasure from the storage section to set the lower one to the target temperature of the fixing device in a case in which the processing information of the fixing processing and the erasing processing is input by the input section and the processing is continuously carried out, and drive the fixing device via the driving section at a driving speed corresponding to each of the fixing processing and the erasing processing.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: January 22, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Toshiyuki Ueno
  • Patent number: 10082756
    Abstract: An image forming apparatus includes: a toner-image fixer that fixes an unfixed toner image on a sheet by conveying the sheet while heating and pressing the sheet at a fixing nip; a pressing force changer that changes a pressing force against the sheet at the fixing nip; and a hardware processor that controls the toner-image fixer and the pressing force changer, in which when a conveying speed of the sheet is changed by controlling the toner-image fixer, the hardware processor causes the conveying speed to change in a state in which the pressing force is decreased by controlling the pressing force changer.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: September 25, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Hajime Kawakami
  • Patent number: 10069435
    Abstract: The power supply apparatus configured to supply power to a load includes a control unit that corrects a power amount calculated by a power calculation unit based on a first voltage of an AC power supply calculated by a voltage calculation unit when the power amount is calculated, and a second voltage of the AC power supply calculated by the voltage calculation unit when a switching unit is controlled to start power supply to a power supply and a first transformer from the AC power supply.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: September 4, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Masatoshi Itoh
  • Patent number: 10067451
    Abstract: An image forming apparatus includes a main body and a fixing unit. The fixing unit is attachable to and detachable from the main body. The fixing unit includes a heating roller, a pressure roller, and a pressing member. The pressing member presses the pressure roller against the heating roller. The main body includes a cam and a slope member. The cam changes a pressing state of the pressing member. The slope member guides a lower end of the pressing member to a topmost part of the cam in attachment of the fixing unit to the main body.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: September 4, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Takeshi Iketani
  • Patent number: 10061235
    Abstract: A fixing device includes an endless fixing belt that is multilayered, an opposing rotator disposed opposite the fixing belt and pressed to the fixing belt to form a nip, a heater disposed inside the fixing belt, and a safety device including a contactless temperature sensor disposed outside the fixing belt and apart from an outer face of the fixing. The fixing belt is to rotate and thermally expand. The contactless temperature sensor detects a temperature of the fixing belt. The safety device stops heating by the heater when the temperature detected by the contactless temperature sensor is at or higher than a predetermined temperature. As the outer face of the fixing belt shifts outward in the radial direction due to thermal, a proportion of the outer face of the fixing belt in a viewing angle of the contactless temperature sensor increases.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: August 28, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Keitaro Shoji, Yasunori Ishigaya, Kazuya Saito, Ryohei Matsuda, Hiromasa Takagi, Ryuuichi Mimbu, Toshihiko Shimokawa
  • Patent number: 10061238
    Abstract: An image forming apparatus includes a fuser configured to fuse printing paper where a toner has been developed; and a fuser driver configured to provide power being provided from an external AC to a heating element inside the fuser so that the fuser has a predetermined temperature, wherein, in response to an operational state of the image forming apparatus being at a waiting state, the fuser driver performs a phase control on the power being provided to the heating element using AC power of sections other than a phase angle of a range predetermined based on a peak voltage value of the external AC power.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: August 28, 2018
    Assignee: S-PRINTING SOLUTION CO., LTD.
    Inventors: Young-jun Song, Chang-su Ma, Sung-kyu Choi
  • Patent number: 10054885
    Abstract: A pressure and pressure relief device includes a rotator, a pressure body, a first pressure lever, and a biasing mechanism. The biasing mechanism includes a first elastic body, a second pressure lever, a cam, and a cam follower. A relations of L1>L3, L2>L4, and L3<L4 are satisfied. L1 represents a length between a first fulcrum of the first pressure lever and a point of load of the first pressure lever. L2 represents a length between the point of load of the first pressure lever and a hook portion of the first pressure lever. L3 represents a length between a pivot of the second pressure lever and a second fulcrum of the second pressure lever. L4 represents a length between the second fulcrum of the second pressure lever and a fastened portion of the second pressure lever.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: August 21, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Jun Okamoto, Yoshio Hattori, Yuusuke Furuichi, Haruyuki Honda, Kiwako Hiroi, Kenichi Hasegawa
  • Patent number: 10025248
    Abstract: An image forming apparatus includes an input portion into which a job is to be input, an image forming portion configured to form a toner image on a recording material to execute the job input into the input portion, a fixing portion configured to fix, on the recording material, the toner image formed by the image forming portion, the fixing portion being capable of being replaced with another fixing portion depending on a content of the job, a selecting portion configured to prompt an operator to select one of a plurality of modes before a plurality of jobs are successively reserved, and a controller configured to control the execution order of reserved jobs. The controller can change the execution order of the plurality of jobs so as to decrease the number of times of replacement of the fixing portion, or the controller can maintain the execution order of the plurality of jobs in a reserved order.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: July 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhiro Kikuchi, Yasuharu Chiyoda, Masahiro Tsujibayashi, Satoru Yamamoto, Katsuya Nakama
  • Patent number: 10012933
    Abstract: A fixing device having a fixing member heated from a heating member, and a pressing member in pressurized contact with the fixing member, formed with a contact portion either at the fixing member or at the pressing member, wherein the fixing member and the pressing member are driven only in an amount equal to or less than a width of the contact portion at every time when a certain period elapses, during a waiting state in which the fixing member and the pressing member are stopped from being driven, and in which the heating member is heating the fixing member.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: July 3, 2018
    Assignee: OKI DATA CORPORATION
    Inventor: Masahiro Haruyama
  • Patent number: 10007214
    Abstract: An image forming apparatus includes a conveying device; a fixing device; and a controller. The controller is configured to perform: in response to determining that a first condition is met, starting sheet conveyance by the sheet conveying device upon expiration of a first predetermined period of time starting from receipt of a print instruction; and in response to determining that a second condition different from the first condition is met, starting sheet conveyance by the sheet conveying device at selective one of a first timing and a second timing. The second timing is selected upon determination that an accumulated amount of usage of the fixing device is not greater than a predetermined amount. The first timing is a timing at which a sensed temperature has reached a first threshold value. The second timing is a timing at which a second predetermine period of time has expired after the first timing.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: June 26, 2018
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Masahiko Kamo, Kei Ishida
  • Patent number: RE48099
    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: December 1, 2017
    Date of Patent: July 14, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kazutoshi Takahashi, Satoshi Kinouchi, Ryota Saeki, Shoko Shimmura, Toshihiro Sone