Warmup Or Standby Mode Patents (Class 399/70)
  • Patent number: 10649375
    Abstract: An image forming apparatus includes an image forming portion, a fixing portion, a temperature detecting portion, a measuring portion, a storing portion, and a controller. The controller is capable of setting a case that a start of feeding of a recording material is permitted after a lapse of a predetermined time need to measure a temperature rising rate of the fixing portion and a case that the start of feeding of the recording material is permitted, depending on a value relating to the temperature rising rate stored in the storing portion, at timing before the lapse of the predetermined time.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: May 12, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeharu Nakada, Tomoo Akizuki, Ryo Morihara, Masahiko Suzumi
  • Patent number: 10642200
    Abstract: There is provided a fixing device, in which an operation delay of a safety element is unlikely to occur even if a heater tilts. The fixing device includes a spacer disposed between the heater and the safety element, wherein an area of the spacer in contact with the safety element is smaller than an area of the spacer in contact with the heater, and the spacer is tiltable relative to the safety element.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: May 5, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Osamu Sasaoka, Masafumi Maeda
  • Patent number: 10591852
    Abstract: A fixing device includes a contact portion that comes into contact with a recording material transported; a heat source that heats the contact portion and has a counter surface and an opposite surface, the counter surface facing the contact portion; a high-thermal-conductivity portion provided on the opposite surface of the heat source and extending in a width direction intersecting a transport direction of the recording material, the high-thermal-conductivity portion having a higher thermal conductivity than the contact portion; a low-thermal-conductivity portion provided between the opposite surface of the heat source and the high-thermal-conductivity portion and having a lower thermal conductivity than the high-thermal-conductivity portion; and a temperature detector that detects a temperature of the heat source and is provided on the opposite surface of the heat source and at a position shifted from the high-thermal-conductivity portion and the low-thermal-conductivity portion in the transport direction.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: March 17, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kiyoshi Koyanagi, Takaaki Sato, Kazuyoshi Itoh, Toru Inoue
  • Patent number: 10520868
    Abstract: A fixing device includes a belt member, an inner circumferential rotating body, an outer circumferential rotating body, and a rotation starter. The belt member has an inner circumferential surface and an outer circumferential surface and fixes an image formed on a recording medium. The inner circumferential surface of the belt member is looped over the inner circumferential rotating body. The inner circumferential rotating body rotates the belt member. The outer circumferential rotating body is movable between a contact position at which the outer circumferential rotating body is in contact with the outer circumferential surface of the belt member and a separated position at which the outer circumferential rotating body is separated from the outer circumferential surface of the belt member. The outer circumferential rotating body rotates the belt member when the outer circumferential rotating body is disposed at the contact position.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: December 31, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yuhei Tomita
  • Patent number: 10496341
    Abstract: An image forming apparatus includes an authentication section configured to execute an authentication process on a replacement part; and a controller configured to skip the authentication process when determining that a stop period from the start of operation stop to the end or the operation stop is equal to or shorter than a predetermined period of time, and to execute the authentication process when determining that the stop period exceeds the predetermined period of time.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: December 3, 2019
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Takayuki Nishi
  • Patent number: 10474088
    Abstract: An image formation device includes a power controller that controls transition to an energy-saving mode to reduce power consumption in a standby state and starts up out of the energy-saving mode and a timer in which a timing schedule that starts up the device out of the energy-saving mode is set. The power controller controls the surface temperature of the fixing roller of the image generator to be a temperature lower than the fixing temperature that enables image formation when the image formation device is started up out of the energy-saving mode according to the timing schedule set in the timer.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: November 12, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Hiroyuki Ishikura
  • Patent number: 10459381
    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: December 21, 2018
    Date of Patent: October 29, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Keiji Yuge
  • Patent number: 10452010
    Abstract: A fuser assembly includes a heated member and a backup member defining a fusing nip. Toner fuses to media in the nip at a fusing temperature and process speed during an imaging operation. Upon receipt of a command to commence imaging, a controller operates a heater to heat the fuser assembly to a first temperature less than the fusing temperature and operates a motor to rotate the fuser assembly at a speed lower than the process speed to prevent overheating the heated and backup members. Before a first media reaches the fusing nip, a speed of the motor is increased to the process speed to properly advance the media through the nip at the process speed. Upon the first media arriving at the fusing nip, the controller increases the temperature of the heater to a second temperature greater than the first temperature to prevent cold offset.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: October 22, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Jichang Cao, Douglas Campbell Hamilton, Benjamin Karnik Johnson
  • Patent number: 10429756
    Abstract: A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: October 1, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuoki Fuwa, Hiroshi Yamashita, Yuka Mizoguchi, Shizuka Hashida, Toma Takebayashi, Junko Yamaguchi, Maia Kamei, Keisuke Ohta
  • Patent number: 10289037
    Abstract: A fixing device includes a lateral end heater, disposed opposite a lateral end of an inner circumferential surface of a fixing rotator in an axial direction thereof, to heat the fixing rotator and a thermal conduction aid contacting the fixing rotator and the lateral end heater to conduct heat. The lateral end heater includes a power supply portion disposed outboard from a lateral end of the thermal conduction aid in a longitudinal direction thereof and disposed opposite the inner circumferential surface of the fixing rotator. The power supply portion includes an electrode. A cover covers the power supply portion and includes a cover face disposed opposite the inner circumferential surface of the fixing rotator. A height adjuster adjusts a height of the cover face of the cover and causes the cover face to define an identical plane with a fixing rotator side face of the thermal conduction aid.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 14, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Takayuki Seki, Takashi Seto, Kenji Ishii, Hiroshi Yoshinaga, Ippei Fujimoto, Kazunari Sawada, Hiroyuki Shimada
  • Patent number: 10281854
    Abstract: An image forming apparatus includes an image forming unit, a fixing unit having a heating member for generating heat based on power supplied, a detection unit, and a controller. The image forming unit forms an image on a sheet. The fixing unit fixes the image on the sheet by the heat of the heating member. The detection unit detects a temperature of the heating member. The controller controls power to be supplied to the heating member based on a temperature detected by the detection unit. The controller determines a difference value between the temperature detected by the detection unit and a target temperature, determines an accumulated value by performing accumulation processing of the difference value, and controls the power based on the difference value and the accumulated value. The controller controls the accumulation processing based on the difference value and the accumulated value.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: May 7, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kana Oshima, Jiro Shirakata, Shusuke Miura
  • Patent number: 10268145
    Abstract: A fixing device includes a cylindrical film having an inner surface and a plate-like heater that extends in a longitudinal direction of the film, with the heater having (i) a first surface that contacts the inner surface of the film, and (ii) a second surface opposite to the first surface. The fixing device further includes a heat conduction plate that extends in the longitudinal direction of the film and contacts the second surface of the heater, and a supporting member that supports the heater through the heat conduction plate. An image that is formed on a recording material is heated by heat from the heater through the film.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: April 23, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsutoshi Ando, Takashi Narahara, Toru Imaizumi, Yasuhito Minamishima
  • Patent number: 10248056
    Abstract: A fixing device includes a fixing member, a pressuring member and a temperature sensing part. The fixing member heated by a heat source contacts with a recording medium to heat a toner image on the recording medium. The pressuring member pressures the recording medium to the fixing member. The temperature sensing part in non-contact with the fixing member includes an infrared sensing element sensing infrared rays from the fixing member and a condensing member condensing the infrared rays to the infrared sensing element. Detection temperature of the fixing member is calculated with a sensing value by the infrared sensing element. The detection temperature or control temperature of the heat source is corrected with temperature deference between the infrared sensing element and the condensing member. Heating of the fixing member is controlled with the corrected detection temperature and the control temperature or the detection temperature and the corrected control temperature.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: April 2, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Eriko Hayashi, Ryohei Tokunaga, Tatsuya Yamanaka, Takashi Kainuma
  • Patent number: 10228643
    Abstract: An image heating apparatus includes an endless belt and a rotatable member configured to form a nip for heating a toner image on a recording material therebetween, a substantially stationary pad member and a movable pad member provided along a feeding direction of the recording material and configured to press the endless belt toward the rotatable member from an inside of the endless belt, a moving mechanism configured to move the movable pad member between a first position at which the movable pad member presses the endless belt toward the rotatable member and a second position at which the movable pad member does not press the endless belt toward the rotatable member, and a sheet-like member configured to cover such a surface of the stationary pad member as is opposite to the rotatable member and such a surface of the movable pad member as is opposite to the rotatable member.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: March 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ikuo Nakamoto
  • Patent number: 10216134
    Abstract: An image formation device includes a power controller that controls transition to an energy-saving mode to reduce power consumption in a standby state and starts up out of the energy-saving mode and a timer in which a timing schedule that starts up the device out of the energy-saving mode is set. The power controller controls the surface temperature of the fixing roller of the image generator to be a temperature lower than the fixing temperature that enables image formation when the image formation device is started up out of the energy-saving mode according to the timing schedule set in the timer.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: February 26, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Hiroyuki Ishikura
  • Patent number: 10088787
    Abstract: A fixing device includes a first pressure structure, a second pressure structure, a fixing member, a first arm, a second arm, and an elastic member. The fixing member is disposed between the first and second pressure structures. The first arm is pivotable about a first shaft and includes a first pressing portion and a first connection portion. The second arm is pivotable about a second shaft and includes a second pressing portion and a second connection portion. The elastic member biases the first and second pressing portions toward each other. A first leverage ratio of a distance between the first shaft and the first connection portion to a distance between the first shaft and the first pressing portion is different from a second leverage ratio of a distance between the second shaft and the second connection portion to a distance between the second shaft and the second pressing portion.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: October 2, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Kenji Takeuchi
  • Patent number: 10001747
    Abstract: An image forming apparatus includes: a fusing unit that heats a toner image and fixes the toner image on a recording medium; an exhaust passage that allows air heated by the fusing unit to flow and discharges the air to an outside of the apparatus; a delivery unit that moves the air in the exhaust passage in a discharge direction; a target structural component to which the air is to be delivered; a ventilation passage that connects a portion on a downstream side of the delivery unit of the exhaust passage in the discharge direction and the target structural component, and that allows the air to flow; and an adjuster that adjusts a passage through which the air flows, at a branch point between the exhaust passage and the ventilation passage.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: June 19, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kazuya Tamura, Masafumi Kudo, Koji Udagawa
  • Patent number: 9740160
    Abstract: An image formation device includes a power controller that controls transition to an energy-saving mode to reduce power consumption in a standby state and starts up out of the energy-saving mode and a timer in which a timing schedule that starts up the device out of the energy-saving mode is set. The power controller controls the surface temperature of the fixing roller of the image generator to be a temperature lower than the fixing temperature that enables image formation when the image formation device is started up out of the energy-saving mode according to the timing schedule set in the timer.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: August 22, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Hiroyuki Ishikura
  • Patent number: 9651902
    Abstract: There is provided an image forming apparatus including a fixing unit in which fixing temperature is calculated from a toner bearing amount and fixing processing is performed while reducing drop in the print speed. A method for controlling a temperature of a fixing unit for fixing a recording material onto a recording medium includes determining, for image data of a plurality of pages, whether a data size of the image data of a unit page is smaller than or equal to a predetermined threshold, and based on the determination result, selecting whether to control the temperature of the fixing unit to be a temperature determined from the amount of the recording material of the image data of the unit page, or to control the temperature of the fixing unit to be a predetermined temperature.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: May 16, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Mikio Yamano
  • Patent number: 9426326
    Abstract: An image forming apparatus communicable with an external apparatus includes a reception unit configured to receive from the external apparatus a request for displaying a frame used to operate the image forming apparatus on a display of the external apparatus, an execution unit configured to perform shut down processing of the image forming apparatus when a predetermined time has elapsed, and a control unit configured to prevent the execution unit from performing the shut down processing in a case where the reception unit has received the request before the predetermined time has elapsed.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: August 23, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomohiko Bito
  • Patent number: 9419513
    Abstract: Methods, devices, and integrated circuits are disclosed for controlling switch timing in a power factor correction timing switch. In one example, a device is configured to receive one or more indications of one or more power factor correction circuit parameters. The device is further configured to determine a switch delay time based at least in part on the one or more power factor correction circuit parameters. The device is further configured to generate an indication of a switch on time for the power factor correction timing switch, wherein the switch on time is based at least in part on the switch delay time.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: August 16, 2016
    Assignee: Infineon Technologies Austria AG
    Inventors: Mingping Mao, Junyang Luo, Dong Li
  • Patent number: 9411284
    Abstract: A fixing device includes a rotatable fuser member, a rotatable pressure member, a heater, and a controller. The rotatable fuser member is subjected to heating. The rotatable pressure member is disposed opposite the fuser member. The pressure member presses against the fuser member to form a fixing nip therebetween, through which multiple recording media, each spaced apart from each other by an interval distance in a conveyance direction, are sequentially conveyed at a conveyance speed. The heater is disposed adjacent to the fuser member to heat the fuser member. The controller is operatively connected to the heater to control power supply to the heater through a series of on-off switching control cycles, each including an on-time during which the heater power supply is on, and an off-time during which the heater power supply is off, in synchronization with conveyance of the recording medium.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: August 9, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Takumi Waida, Hiroshi Seo, Ippei Fujimoto, Ryota Yamashina
  • Patent number: 9354688
    Abstract: An image forming apparatus monitors sleep-cancelling events, and when a sleep-cancelling event occurs, stores an identifier and a sleep-cancellation time of the event. If a start time of a sleep mode is reached when (i) the apparatus is in a standby mode and (ii) one or more sleep-cancelling events specifying sleep-cancellation times later than the start time have been stored, the apparatus calculates power consumption required to maintain the standby mode for a period from the start time to the earliest sleep-cancellation time, as a power-saving amount savable during the period. Also, a recovery power amount required for recovery from the sleep mode to the standby mode is calculated on the assumption that the sleep mode is started at the start time and is cancelled at the earliest sleep-cancellation time. Switching to the sleep mode is performed only when the power-saving amount is greater than the recovery power amount.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: May 31, 2016
    Assignee: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventor: Toshiya Furubayashi
  • Patent number: 9335682
    Abstract: An image forming apparatus includes a fixing device. The fixing device includes a fixing roller and a pressure roller. The fixing roller applies heat of a predetermined fixing temperature T1 to a print sheet S to which a toner image has been transferred. The pressure roller has a larger heat capacity than the fixing roller. A control portion of the image forming apparatus determines, in a power saving mode, whether or not a detection result of a temperature sensor is equal to or lower than a motor rotation start temperature T3 which is lower than the fixing temperature T1 (first step). Upon determining that the detection result is equal to or lower than the motor rotation start temperature T3, the control portion controls a driving motor to rotate the fixing roller at least once in the state where a halogen lamp has been lighted off (second step).
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: May 10, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yuichiro Kurokawa
  • Patent number: 9316980
    Abstract: Provided is an image forming apparatus made to shorten time of a first copy (first page copy of a manuscript.) In the image forming apparatus, primary feeding (feeding from a sheet paper cassette to a resist position roller) and secondary feeding (feeding from a resist position roller) are performed continuously. When a first copy is performed, based on warm-up information, print engine, such as a feed roller, a transfer part, a fixing part, and an ejection roller, is set up. Paper will be fed when the setup is completed. The setup of print engine that performs operation required for printing is performed before feeding by using the warm-up information. Therefore, the time of the first copy is shortened.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: April 19, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Norifumi Miyahara
  • Patent number: 9274465
    Abstract: An image forming apparatus includes a controller including a primary heating control portion to control a heater to perform a primary heating to heat a fixing rotator with a first amount of power determined based on a temperature of the fixing rotator, a secondary heating control portion to control the heater to perform a secondary heating to heat the fixing rotator with a preset second amount of power, and a switch portion to control the heater to switch between the primary heating and the secondary heating during an identical print job and to perform at least one of a primary switching from the primary heating to the secondary heating and a secondary switching from the secondary heating to the primary heating at a time different from a preset control cycle that defines a power supply time in the primary heating and the secondary heating.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: March 1, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Samei, Tomoya Adachi, Daisuke Inoue, Yasuharu Kawarasaki, Yoshiharu Takahashi
  • Patent number: 9256173
    Abstract: According to one embodiment, an image forming apparatus has a fixing member, a heating unit, and a control unit. The fixing member fixes a toner image, which is formed on a recording medium, to the recording medium. The heating unit heats the fixing member. The control unit controls a heating operation of the heating unit based on a ready temperature corresponding to job information input by a user.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: February 9, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventor: Masanaka Mizuno
  • Patent number: 9223275
    Abstract: An image forming apparatus has a first electric power state and a second electric power state in which power consumption is smaller than that in the first electric power state. It is determined whether or not to display a screen for setting information of a sheet held in a sheet holding unit on a display unit, in accordance with whether a factor in a transition is a first factor that is detection of the sheet being held in the sheet holding unit or a second factor that is different from the first factor, after the image forming apparatus is caused to transition from the second electric power state to the first electric power state.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: December 29, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Satoshi Totsuka
  • Patent number: 9223266
    Abstract: An image heating apparatus includes: an endless belt for heating a toner image on a sheet in a nip; a driving rotatable member for cooperating with the belt to form the nip and for rotating the belt; a pressing pad for pressing the belt from an inside of the belt toward the driving rotatable member; a heating device for heating the belt; and a controller configured to execute, in a stand-by mode following a warming-up mode, an intermittent heating operation of the heating device for the belt while rotating the belt by the driving rotatable member. The controller is capable of executing, after executing the intermittent heating operation in a first rest period in the stand-by mode, the intermittent heating operation in a second rest period, which is longer than the first rest period.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: December 29, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Nobuaki Hara
  • Patent number: 9216602
    Abstract: A method includes determining, if power to an apparatus is turned on, whether a state of a sheet has been changed while the power is off, based on a change of the sheet state before turn-off and after turn-on of the power, and performing control to perform initializing operations according to a result of the determination.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: December 22, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuki Igarashi, Masahiro Koshikawa, Shuuichi Masuda
  • Patent number: 9207595
    Abstract: An image forming apparatus includes: an identification information acquiring unit that acquires identification information to identify a user; a usage history information acquiring unit that acquires usage history information for the user specified by the identification information; an output setting forecasting unit that forecasts output setting used by the user based on the usage history information; and a fixing temperature setting unit that sets a fixing temperature based on the forecasted output setting.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 8, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Kiriko Chosokabe, Mikio Nakajima, Homare Ehara
  • Patent number: 9201361
    Abstract: Provided is an image forming apparatus including: a heater heating a fixing member; an acquisition unit acquiring, when an image for one page includes a coded identifier image, information on a range of formation of the coded identifier image on a recording sheet in a sheet-passing direction; a target temperature switching unit switching a target temperature at which temperature of the fixing member is to be maintained at least between a first fixing temperature and a second fixing temperature higher than the first fixing temperature; a controller controlling the heater so that the temperature of the fixing member is maintained at the target temperature, wherein the target temperature switching unit switches the target temperature at a timing such that the temperature of the fixing member is equal to the second fixing temperature while a toner image in the range of formation of the coded identifier image is being fixed.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: December 1, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventor: Harumitsu Fujimori
  • Patent number: 9182718
    Abstract: An image forming apparatus capable of toggling between image formation mode and energy conservation mode, the image formation mode allowing image formation on a recording medium, and the energy conservation mode having power consumption lower than that of the image formation mode, the image forming apparatus including: a constantly-energized portion that is energized both in the image formation mode and the energy conservation mode; a non-constantly-energized portion that is energized only in the image formation mode; and an opening/closing member capable of exposing an internal mechanism held inside a casing of the image forming apparatus, in which the constantly-energized portion toggles from the energy conservation mode to image formation mode when the opening/closing member is closed from an opened state in the energy conservation mode.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: November 10, 2015
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Yasuhiro Iwashima
  • Patent number: 9176439
    Abstract: An image forming apparatus includes: an identification information acquiring unit that acquires identification information to identify a user; a usage history information acquiring unit that acquires usage history information for the user specified by the identification information; an output setting forecasting unit that forecasts output setting used by the user based on the usage history information; and a fixing temperature setting unit that sets a fixing temperature based on the forecasted output setting.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: November 3, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Kiriko Chosokabe, Mikio Nakajima, Homare Ehara
  • Patent number: 9170537
    Abstract: A fuser for fixing an unfixed toner image on a recording material includes: an endless belt body heated by a heat source; a pressing body moved to be connected to and disconnected from an inner peripheral surface of the belt body; a pressure roller member making pressure-contact with the pressing body through the belt body; a tension body moved to be connected to and disconnected from the inner peripheral surface of the belt body, contrary to the connection and disconnection movement of the pressing body; and a rotation transmitting unit configured to transmit a rotational force of the pressure roller member to the belt body using the tension body, while the pressing body is separated from and the tension body makes contact with the inner peripheral surface of the belt body.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: October 27, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yoshikazu Kuribayashi, Hidetoshi Katayanagi, Etsuaki Urano, Hirotaka Kanou, Masashi Sonoyama, Tomohiro Takagi
  • Patent number: 9164441
    Abstract: An image forming apparatus is provided with a fixing unit in which flickers can be effectively reduced while inhibiting electric current imbalance. The fixing unit comprises a fixing heater, a switching unit for switching the fixing heater on/off with an AC power source, and a control unit which controls the switching unit to switch in units of the half wave period of the AC power source AC, and a storing unit for storing a plurality of energization patterns which define the ways of performing the switch control. Each energization pattern corresponds to a control cycle which contains a three or more odd number of the half wave periods each of which is either an OFF period and an ON period, and all the half wave periods of the smaller in number of the ON periods and the OFF periods are not successively arranged.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: October 20, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kenji Tamaki, Takeshi Tamada, Kenji Yamamoto, Kosuke Sasaki, Shohei Otsu
  • Patent number: 9164440
    Abstract: An image forming apparatus includes a fixing unit that fixes an image of a toner using any one of a first toner and a second toner on a recording medium, and a control unit that sets a fixing temperature and a standby temperature of the fixing unit. The control unit sets the fixing temperature when the image of the first toner is fixed to a first temperature, sets the fixing temperature when the image of the second toner is fixed to a second temperature lower than the first temperature, and sets the standby temperature when the fixing unit is in a standby state to a temperature closer than the second temperature than the first temperature.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: October 20, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventor: Taizo Kimoto
  • Patent number: 9146509
    Abstract: An image forming apparatus includes a fixing member; a pressing member; a first temperature detection unit for detecting a temperature of the fixing member; a second temperature detection unit for detecting a temperature of the pressing member; and a rotational speed control unit for controlling a rotational speed of the fixing member according to the temperature detected with the first temperature detection unit and the temperature detected with the second temperature detection unit.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: September 29, 2015
    Assignee: OKI DATA CORPORATION
    Inventor: Toshiki Sato
  • Patent number: 9141049
    Abstract: Image forming apparatus including: first executing unit executing image formation mode of forming image by transferring toner image from image holder onto recording sheet, and then, in fixing device, causing fixing member, heated to fixable temperature by heater, to thermally fix toner image; second executing unit executing non-image-formation mode not involving thermal fixing performed by fixing device; instructing unit selectively instructing to execute image formation mode or non-image-formation mode; and controller controlling power supply to heater of fixing device in accordance with execution state of image formation and non-image-formation modes, the controller performing first control of decreasing temperature of fixing member by stopping or reducing power supply to heater when non-image-formation mode starts, and second control of stopping first control at predetermined timing during execution of non-image-formation mode and increasing temperature of fixing member so as to reach predetermined target
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: September 22, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventor: Yu Tanaka
  • Patent number: 9122188
    Abstract: An image forming apparatus including: a photosensitive member driving unit configured to rotate the photosensitive member; a charge unit having an opening portion and configured to charge the surface of the photosensitive member; a shield member movable between a closed position for closing the opening portion and an open position for opening the opening portion; a shield member driving unit configured to move the shield member between the closed position and the open position; and a control unit configured to control the photosensitive member driving unit to rotate the photosensitive member in a state in which the shield member is situated at the open position, and to prevent the photosensitive member from rotating in a state in which the shield member is situated at the closed position.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: September 1, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kenji Fukushi
  • Patent number: 9075356
    Abstract: In an image forming apparatus having a fixing unit for fixing a toner image on a printing medium, it is necessary to control a fixing temperature with high precision according to the content of an image. An image forming apparatus of the present invention includes: an input unit configured to input image data; and a controlling unit configured to control the fixing temperature of the fixing unit based on a size of a continuous region of pixels whose pixel values are equal to or larger than a predetermined pixel value in the image data.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: July 7, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Maho Ooyanagi
  • Patent number: 9046837
    Abstract: A fixing device includes a heater to generate heat based on soft-start control. The heater is supplied with power using different power-turn-on-duty control patterns in accordance with power requirements and an operation mode of the fixing device.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: June 2, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yutaka Ikebuchi, Masaaki Yoshikawa, Kenji Ishii, Yuji Arai, Hiromasa Takagi, Naoki Iwaya, Tetsuo Tokuda, Yoshiki Yamaguchi, Takuya Seshita, Takahiro Imada, Ippei Fujimoto, Hiroshi Yoshinaga, Hajime Gotoh, Arinobu Yoshiura, Toshihiko Shimokawa
  • Publication number: 20150147077
    Abstract: An image forming apparatus includes a fixing device. The fixing device includes a fixing roller and a pressure roller. The fixing roller applies heat of a predetermined fixing temperature T1 to a print sheet S to which a toner image has been transferred. The pressure roller has a larger heat capacity than the fixing roller. A control portion of the image forming apparatus determines, in a power saving mode, whether or not a detection result of a temperature sensor is equal to or lower than a motor rotation start temperature T3 which is lower than the fixing temperature T1 (first step). Upon determining that the detection result is equal to or lower than the motor rotation start temperature T3, the control portion controls a driving motor to rotate the fixing roller at least once in the state where a halogen lamp has been lighted off (second step).
    Type: Application
    Filed: November 24, 2014
    Publication date: May 28, 2015
    Inventor: Yuichiro Kurokawa
  • Patent number: 9041942
    Abstract: An image forming apparatus includes: an applying device configured to generate an output signal and apply the output signal to an image forming device; and a controller configured to generate a control signal to supply to the applying device so as to control a value of the output signal so that the value of the output signal is within a predetermined target range and control the applying device using the control signal in a start-up mode and in a normal mode, the normal mode being subsequent to the start-up mode. In the start-up mode, the controller sets a start control signal value larger than a value of the control signal immediately after a first predetermined time, the start control signal value being the value of the control signal during the first predetermined time, the first predetermined time being from a start timing of the start-up mode.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: May 26, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masamitsu Takahashi, Katsumi Inukai
  • Patent number: 9041953
    Abstract: Disclosed is an image forming apparatus, including: a job input unit; a job execution unit; a job storing unit; a start-up cost calculation unit to calculate a start-up cost which is a cost for start-up of the image forming apparatus, when the job is input from the job input unit; a total sum calculation unit to calculate a total sum of investable amount of the input job and the stored jobs; a job control unit to instruct the job storing unit to store the input job in case that the total sum is less than the start-up cost, and instruct the job execution unit to collectively execute the input job and the stored jobs in case that the total sum is not less than the start-up cost; and a charging unit configured to allocate the start-up cost to the jobs, and charge the allocated start-up cost for each executed job.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: May 26, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masaki Nakata
  • Patent number: 9042761
    Abstract: A fixing device capable of shifting to a sleep state includes a heat source; a rotatable fixing member that is partly heated by the heat source to heat an unfixed image carrying surface of a recording medium; a rotatable pressing member that is in pressure contact with the fixing member to form a nip portion between the pressing member and the fixing member; a rotation drive unit that directly or indirectly rotates the fixing member; a temperature detecting unit that detects a temperature of the fixing member; and a controller configured to prohibit the fixing device from shifting to the sleep state when the temperature of the fixing member in a region facing the heat source is equal to or more than a predetermined temperature T1 at a point when a predetermined time period t1 has elapsed from the stop of rotation drive of the rotation drive unit.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: May 26, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Takeshi Uchitani, Masahiko Satoh, Masaaki Yoshikawa, Kenji Ishii, Tadashi Ogawa, Takahiro Imada, Hiromasa Takagi, Hiroshi Yoshinaga, Arinobu Yoshiura, Teppei Kawata, Takamasa Hase, Hajime Gotoh, Takuya Seshita, Kazuya Saito, Toshihiko Shimokawa, Kensuke Yamaji, Shuutaroh Yuasa, Akira Suzuki, Shinichi Namekata, Ryota Yamashina, Yasunori Ishigaya
  • Patent number: 9031444
    Abstract: An image forming apparatus includes a plurality of heaters 56 for heating the fixing roller 52, a plurality of temperature sensors 57 for detecting the temperatures of the areas to be heated by the plurality of heaters 56 respectively, and a control unit 11 for turning on and off the plurality of heaters 56 on the basis of the temperatures detected by the plurality of temperature sensors 57. If one of the heaters 56 is on when the area to be heated by the other heater cools down to the ON temperature, the control unit 11 turns on the other heater with the same timing as the one heater is turned off.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: May 12, 2015
    Assignee: Konica Minolta, Inc.
    Inventors: Akinori Kimata, Yoshihito Sasamoto, Tadayuki Ueda, Toru Kasamatsu, Eiji Nishikawa, Takanobu Shiki
  • Patent number: 9031443
    Abstract: An image forming apparatus includes an image forming station for forming an unfixed image on a recording material; a fixing portion for heating and fixing an unfixed image formed on the recording material, the fixing portion including a fixing rotatable member, and a pressing roller cooperative with the fixing rotatable member to form a nip for nipping and feeding the recording material; an ambient condition sensor for detecting an ambient temperature and an ambient humidity; and a controller for controlling the fixing portion; wherein the controller sets such a warming-up time for warming up the fixing portion that a temperature of the pressing roller at the time when the recording material enters the nip is a temperature calculated on the basis of the ambient temperature and the ambient humidity.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiteru Kaida, Yasuharu Hirado
  • Patent number: 9031442
    Abstract: An image-forming apparatus includes: a fixing device; a power supply unit; a non-contact temperature sensor; and a control device. The fixing device has a heating member. The power supply unit is configured to supply electric power to the heating member. The non-contact temperature sensor is disposed in a position separate from the heating member and configured to detect temperature of the heating member. A first function and a second function respectively produce a first corrected temperature value and a second corrected temperature value smaller than the first corrected temperature value with respect to a given detected temperature. The control device is configured to: select the first function to correct the detected temperature at a start of a print control process; switch from the first function to the second function at a prescribed timing during the print control process; and control the power supply unit based on the corrected temperature.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: May 12, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Tatsuya Koyama, Yuki Fukusada
  • Patent number: 9031445
    Abstract: An image forming apparatus that is capable of coping with both a high power saving effect and a quick response. A reading unit reads an image of an original. A printing unit prints out image data. A control unit controls units including the reading unit and the printing unit. A detection unit detects an original placed in the reading unit. A power control unit restores the control unit and the reading unit from a sleep state when the detection unit detects an original, and further restores the printing unit from the sleep state before receiving a job when a sheet of the same size as the original concerned is stored.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: So Yokomizo