Control Of Cleaning Patents (Class 399/71)
  • Patent number: 11163247
    Abstract: In an example of the disclosure, a blanket servicing system includes a rotatably mounted endless cleaning surface and a scraper. The endless cleaning surface is to have a first engagement with a blanket to obtain a layer of thermoplastic print agent from the blanket. The endless cleaning surface is to have a second engagement with the blanket to receive residue from the blanket onto the layer of thermoplastic print agent. The scraper is to scrape the endless cleaning surface to transfer the residue from the endless cleaning surface to a collection element.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: November 2, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Amir Kedem, Michael Kokotov, Alex Feygelman, Guy Nesher, Nadav Shalem, Michael Vinokur
  • Patent number: 11054786
    Abstract: An image forming apparatus includes an image bearing member, a charging member for charging the image bearing member, an exposure unit for exposing the charged surface of the image bearing member, a developing apparatus that supplies a developer containing a toner particle and an external additive having an opposite charging polarity to the regular charging polarity of the toner particle to the image bearing member, a cleaning member for removing the developer from the image bearing member, a transfer member for transferring a developer image on the image bearing member onto a transfer subject material, and a voltage application unit for applying a voltage to the transfer member. During an image non-formation period as a lubrication operation to the cleaning member, (i) the developer is supplied to the image bearing member, and (ii) a voltage having an identical polarity to a voltage applied during the image formation operation is applied.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: July 6, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuichiro Hirata, Taku Watanabe, Shunsuke Matsushita, Takayoshi Kihara
  • Patent number: 10908537
    Abstract: In an image forming apparatus, at least a part of a cleaning roller is provided on the same side as an opposed roller with respect to an external common tangent Z of a first roller and a second roller. In a case in which a surface velocity of the driving roller is designated as v1; a surface velocity of the cleaning roller is designated as v2; a radius of the cleaning roller is designated as r; a radius of the opposed roller is designated as s; and a distance between the center of rotation of the cleaning roller and the center of rotation of the opposed roller is designated as x, the cleaning roller is rotated so as to satisfy a relationship: v2/v1<r/(x?s).
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: February 2, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kentaro Yamana
  • Patent number: 10877403
    Abstract: An example method of performing a null cycle in a liquid electrographic printer is described. The method involves collecting, at a photo imaging plate cleaning station, imaging oil deposited on a photo imaging plate during a print cycle. During a null cycle, the photo imaging plate cleaning station is controlled to apply the collected imaging oil to the photo imaging plate.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: December 29, 2020
    Assignee: HP Indigo B.V.
    Inventors: Shmuel Borenstain, Shahar Stein, Asaf Anufa
  • Patent number: 10466634
    Abstract: An image forming apparatus includes: an image bearing member; a developer carrying member configured to contact with the image bearing member and to be separated from the image bearing member; a control unit for controlling the image bearing member and the developer carrying member; and a contact member disposed in contact with the image bearing member. The control unit is configured to sequentially execute: (1) rotating the image bearing member at a first speed in a separated state; (2) switching the image bearing member and the developer carrying member from the separated state to a contact state in a state in which the image bearing member rotates at the first speed; and (3) rotating the image bearing member by decreasing a rotation speed of the image bearing member from the first speed to a second speed smaller than the first speed in the contact state.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: November 5, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hisashi Yamauchi, Masataka Mochizuki, Norihito Naito
  • Patent number: 10359731
    Abstract: An image forming apparatus includes an image carrier carrying a toner image, a developing device, and a cleaning blade. The developing device carries out developing process feeding toner to the image carrier during image forming. The cleaning blade comes into contact with the image carrier and removes waste toner remained on the image carrier. In order to restrain turning-up of the cleaning blade, turning-up restraining process is carried out to feed the toner from the developing device to the image carrier during non-image forming, every time a given cumulative printing number of image forming operation is finished. In the turning-up restraining process, larger toner is fed to the image carrier as a given small size printing number in the cumulative printing number becomes larger.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: July 23, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Shingo Sakato, Katsuya Ota
  • Patent number: 10311345
    Abstract: An image-forming apparatus includes a photosensitive drum, a developing roller, a collecting roller, a belt, a cleaner, and a controller. In response to receiving a signal, the controller performs a process staring with a first process and ending with a second process. The controller rotates the developing roller at a contact position at a first speed in the first process. The controller causes the collecting roller to move residual toner to the belt to allow the cleaner to clean the belt while the developing roller is separated from the photosensitive drum in the second process. The process further includes: (a) causing the developing roller to halt rotating while maintaining the developing roller at the contact position; and (b) causing the developing roller halted in the (a) causing to start rotating at a second speed lower than the first speed while maintaining the developing roller at the contact position.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: June 4, 2019
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masashi Imai, Daisuke Maeta
  • Patent number: 10168656
    Abstract: An image forming apparatus forms an image by transferring a toner image to a sheet, the toner image being formed on an image carrier belt with an elastic layer on a surface. The apparatus includes a rigid blade, an angle detector, an angle changer and a hardware processor. The rigid blade contacts with the image carrier from which the toner image has been transferred to the sheet, so as to clean residue attached on the surface of the image carrier. The angle detector detects an effective contact angle between the surface of the image carrier and an opposed surface of the rigid blade opposed to the image carrier. The angle changer changes the effective contact angle. The hardware processor controls the angle changer according to a detection result by the angle detector to regulate the effective contact angle to a predetermined range.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: January 1, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Taichi Meguro
  • Patent number: 10108131
    Abstract: An image forming apparatus includes a belt, an image bearing member, a developing portion, a belt transfer portion, a steering roller, a detection portion, a cleaning blade, a control portion, and an instruction input portion. In a case where the input has been performed through the instruction input portion, the control portion executes, before starting image formation for the first time after replacement of the belt, an adjustment mode including a series of processes in which a relationship between the position in the width direction and the amount of tilting of the steering roller is adjusted, and also performs a toner supplying operation of supplying toner by transferring a toner image for supplying toner onto the belt.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: October 23, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Ueno
  • Patent number: 10073382
    Abstract: An image forming apparatus includes: a transfer member that secondarily transfers a developer image primarily transferred to a intermediate transfer medium, to a recording medium; a charging member that charges residual developer remaining on the intermediate transfer medium after the developer image is secondarily transferred from the intermediate transfer medium to the recording medium; and a storage portion that stores information on a image bearing member. A bias applied to the charging member is changed based on the information when the residual developer charged by the charging member is collected by being transferred from the intermediate transfer medium to the image bearing member.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: September 11, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takayoshi Kihara, Yusaku Iwasawa
  • Patent number: 10067464
    Abstract: An optical scanning device includes a holding member. The holding member has a boss part and an arm part that extends from the boss part in a direction perpendicular to the movement direction of the holding member and holds the cleaning member. The boss part is mounted with a posture correction member relatively movable in the movement direction of the holding member. The posture correction member is movably inserted into a groove between two second rail parts, and when the holding member moves, the posture correction member moves later than movement of the holding member, so that an inclined posture of the holding member is corrected by the delay operation in a direction perpendicular to the second rail part.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: September 4, 2018
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Hiroaki Tsuchiya
  • Patent number: 10061224
    Abstract: An image forming apparatus includes: a photoreceptor; an exposing unit comprising a light window and a light source; a developing unit; a transfer unit; a sensing unit comprising a sensor sensing a toner image of the transfer unit; and a shutter unit configured to open or close the light window and the sensor, wherein the shutter unit includes: a motor configured to have a driving shaft rotating in a first rotation direction and a second rotation direction; a first shutter part configured to open or close the light window by receiving driving force transferred from the driving shaft when the driving shaft rotates in the first and second rotation directions; and a second shutter part configured to open or close the sensor by receiving driving force transferred from the driving shaft when the driving shaft rotates in the second rotation direction.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: August 28, 2018
    Assignee: S-PRINTING SOLUTION CO., LTD.
    Inventors: Jeong-won Hwang, Young-min Yoon
  • Patent number: 9851670
    Abstract: When ending image forming, a state is realized where charging by a charging roller is stopped (charging bias off) and also applying DC voltage at a developing device is stopped (developing bias DC off). In this state, AC voltage is applied to the developing device (developing bias AC on), thereby adhering toner to the surface of a photosensitive drum and forming interposing toner. Driving of the photosensitive drum and an intermediate transfer belt is then stopped in the state with the interposing toner interposed between the photosensitive drum and intermediate transfer belt.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: December 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasushi Takeuchi, Takayuki Ganko, Koji Arimura, Yusuke Ishida, Takanori Iida, Toshiyuki Yamada, Daisuke Makino, Taisuke Matsuura
  • Patent number: 9645538
    Abstract: A developing device includes a developer bearer disposed opposite an image bearer and configured to rotate and carry developer to a latent image on the image bearer, a developer container to contain the developer, a detector including a detecting portion to detect a density of toner in the developer in the developer container, a wire connected to the detector, and a wire holder to hold the wire and determine a position of the wire relative to the detector.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: May 9, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Watanabe, Tetsuro Hirota
  • Patent number: 9625870
    Abstract: An image forming apparatus includes a fixing member, first and second image forming portions, and a processor. In the first and second image forming portions, first and second blades are respectively in contact with first and second photosensitive members. A distance between the first image forming portion and the fixing member is shorter than a distance between the second image forming portion and the fixing member. The processor controls a first image forming portion to perform a toner supply operation in which a first supply member supplies toner amounting to a first quantity per a prescribed rotation amount of the first photosensitive member, and controls the second image forming portion to perform a toner supply operation in which the second supply member supplies toner amounting to a second quantity per the prescribed rotation amount of the second photosensitive member. The second quantity is smaller than the first quantity.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: April 18, 2017
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Junya Sumida
  • Patent number: 9618897
    Abstract: An image forming apparatus includes: an optical sensor which includes a light-emitting part and a light-receiving part opposed to the light-emitting part and is configured to detect an amount of waste toner accumulated in a waste toner container, the waste toner being produced with formation of an image and then accommodated in the waste toner container; a detecting section configured to detect a change in an output of the light-receiving part; a shielding member interposed between the light-emitting part and the light-receiving part and configured to create, between the light-emitting part and the light-receiving part, a light-transmitting environment equivalent to that when the waste toner container is filled with the waste toner; and an adjusting section configured to adjust a light intensity of the light-emitting part when the shielding member is interposed between the light-emitting part and the light-receiving part.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: April 11, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Tadahiro Kiyosumi
  • Patent number: 9599935
    Abstract: In an adjustment step, an adjustment purpose toner image is formed on an intermediate transfer belt, and the adjustment purpose toner image is removed from the intermediate transfer belt by a cleaning member contacting the intermediate transfer belt and through an electrostatic cleaning step. This adjustment step is executed in a state where a toner attachment amount on a charging member is switched from a first limit value, which is allowed in the image forming step to a second limit value, which is allowed immediately before executing the adjustment step. This switching is performed by the execution of a toner discharging step, where a power supply changes the state of applying voltage to the charging member from that in the electrostatic cleaning step, so that toner attached to the charging member is transferred to the intermediate transfer belt.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: March 21, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanori Asai, Kazuhiro Funatani, Hiroyuki Seki, Shuji Saito, Yasutaka Yagi, Tetsuichiro Fujimoto
  • Patent number: 9568883
    Abstract: An image forming apparatus having: an image supporting member; a developing device configured to supply a developer to the image supporting member to develop a latent image; a transfer member configured to transfer the developed image from the image supporting member to a transfer medium; a blade configured to remove the developer left on the image supporting member after transfer therefrom; a storing member located downstream from the transfer member and upstream from the blade, the storing member configured to temporarily store a part of the developer left after transfer therein; and a control unit. The storing member is controlled by the control unit to release the temporarily stored developer therefrom toward the image supporting member after a lapse of a predetermined time from when an image density of an image to be formed becomes lower than a predetermined value.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: February 14, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yohei Ito, Tsugihito Yoshiyama, Yoshiki Nakane
  • Patent number: 9568863
    Abstract: Provided is a transfer device including a transfer member that transfers a toner image to a recording medium, a removing member that has a hardness higher than a hardness of the transfer member and includes a corner portion coming into contact with the transfer member, so as to remove a toner attached to the transfer member by rotation of the transfer member in one direction, and a driving section that rotates the transfer member in the direction and rotates the transfer member in a direction opposite to the direction after a transfer operation of the transfer member is terminated.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: February 14, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yoshinori Takahashi
  • Patent number: 9541869
    Abstract: An image heating apparatus includes first and second rotatable members for heating a toner image therebetween; an endless belt for heating the first rotatable member while being rotated by the first rotatable member; first and second rollers provided inside the endless belt in this order along a rotational moving direction of the first rotatable member and for urging the endless belt toward the first rotatable member; a holding mechanism for rotatably holding the first and second rollers, the first roller being movable relative to the second roller; an urging mechanism for urging the holding mechanism toward the first rotatable member; and an urging member for urging the first roller in a direction away from the second roller.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: January 10, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takuya Hasegawa
  • Patent number: 9519263
    Abstract: An image forming apparatus includes a cartridge detachably attachable to the image forming apparatus, the cartridge including an image bearing member and a cleaning member which abuts against the image bearing member to remove remaining developer on the image bearing member; an inputting portion into which information for detaching the cartridge from the image forming apparatus is inputted; and an execution portion capable of executing, after an operation of forming an image on a recording material is finished, a first operation of rotating the image bearing member in a direction reverse to a rotation direction of the image bearing member and a second operation of rotating the image bearing member in the rotation direction of the image bearing member when the information is inputted to the inputting portion.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: December 13, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Tomine
  • Patent number: 9395676
    Abstract: A cleaning blade cleaning the surface of an object includes a rigid holder; and a strip-shaped elastic body fixed on the holder, including a tip ridgeline contacting the surface of the object. The elastic body has a length (L) projecting from the holder not less than 4 mm, a Martens hardness of from 1.0 to 10.0 N/mm2 from the tip ridgeline to the middle (L/2) thereof, and a Martens hardness of from 0.3 to 0.8 N/mm2 from the middle (L/2) thereof.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: July 19, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiromi Sakaguchi, Shinji Nohsho, Masahiro Ohmori, Yohta Sakon, Masanobu Gondoh, Shohei Gohda, Kaori Toyama
  • Patent number: 9348267
    Abstract: An image forming apparatus includes: an intermediary transfer member; an image forming unit; a transfer member; a cleaning member; and a setting portion for setting an absolute value of the first cleaning voltage applied to the cleaning member when a region of the intermediary transfer member, passed through the transfer portion where a higher transfer voltage is applied to the transfer member during passing of the recording material through the transfer portion, passes through the cleaning portion and for setting an absolute value of the second cleaning voltage applied to the cleaning member when a region of the intermediary transfer member, passed through the transfer portion where a lower transfer voltage is applied to the transfer member during passing of the recording material through the transfer portion, passes through the cleaning portion. The absolute value of the second cleaning voltage is higher than that of the first cleaning voltage.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: May 24, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ryuta Ai
  • Patent number: 9289996
    Abstract: An inkjet recording apparatus that suppresses temperature rising of a recording head to decrease standby time when the recording head is high in temperature, thereby reducing a drop in recording speed and degradation in image quality. The inkjet recording apparatus includes a recording head configured to have a discharge port surface in which a discharge port for discharging ink is formed, a temperature sensor configured to detect temperature of the recording head, and a cleaning unit configured to make contact with the recording head to clean the discharge port surface. The inkjet recording apparatus controls whether to make the cleaning unit contact the discharge port surface based on the recording head temperature detected by the temperature sensor.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: March 22, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuo Suzuki, Masaya Uetsuki, Toshimitsu Danzuka, Masataka Kato, Tsuyoshi Ibe, Asako Tomida, Hiroaki Komatsu
  • Patent number: 9239549
    Abstract: A cleaning device includes a cleaning member that has a plate shape and cleans an outer circumference surface of a revolving cleaning target member with one end side of the cleaning member coming into contact with the outer circumference surface by removing adhering substances adhering to the outer circumference surface, and a detection mechanism that is attached to an end surface of the other end side of the cleaning member and detects vibration of the cleaning member.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: January 19, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Toru Ishii
  • Patent number: 9213271
    Abstract: A cleaner includes a cleaning member electrostatically removing toner on an object; a first electricity supplier supplying a first voltage (or current) with polarity opposite to that of toner to the cleaning member; a toner collecting member collecting toner from the cleaning member; and a second electricity supplier supplying a second voltage with the polarity greater than the first voltage to the toner collecting member. The first and second electricity suppliers set plural setting values of the first and second voltages smaller than the targeted values of the first and second voltages, and first and second control members of the first and second electricity suppliers output first and second control signals while changing in step-by-step manner so that first and second output members of the first and second electricity suppliers apply the first and second voltage in step-by-step manner before the first and second voltages reach the targeted voltages.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: December 15, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuji Wada, Kenji Sugiura, Naohiro Kumagai, Seiichi Kogure, Junpei Fujita, Yusuke Mitani, Kazuki Yogosawa
  • Patent number: 9213292
    Abstract: In an image forming apparatus, when it is determined that a pre-execution condition is satisfied, a cleaning unit is brought from a first state into a second state and is controlled to clean the bearing body. When it is determined that an execution condition is satisfied, a pattern acquisition is executed to form a pattern image on the bearing body by using an image forming section and to acquire characteristics of the pattern image based on detection results. The pre-execution condition includes a condition that a correlation value satisfies a first condition. The correlation value is correlated with an amount of deviation in characteristics of images formed by the image forming section. The execution condition includes a condition that the correlation value satisfies a second condition. The correlation value satisfies the first condition before satisfying the second condition.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: December 15, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Kentaro Murayama
  • Patent number: 9207633
    Abstract: A fixing device includes a rotary fixing member, a sensor, a grinder, and a controller. The rotary fixing member fixes an image on a recording medium. The sensor detects a surface state of the rotary fixing member. The grinder is disposed opposite the rotary fixing member to slide against a surface of the rotary fixing member and grind the surface of the rotary fixing member. The controller controls the grinder to contact or separate from the rotary fixing member, in accordance with a detection result of the surface state detected with the sensor in a recording medium edge passage area of the rotary fixing member over which an edge of a recording medium passes in a direction perpendicular to a feed direction of the recording medium fed with rotation of the rotary fixing member.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: December 8, 2015
    Assignee: Ricoh Company, Ltd.
    Inventor: Masami Okamoto
  • Patent number: 9201377
    Abstract: An image forming apparatus includes: an image forming unit configured to transfer a developer image; a processor; and memory storing computer readable instructions that, when executed by the processor, causing the image forming apparatus to: perform an image forming operation of forming an image; perform a cleaning operation of cleaning unnecessary developer of the image forming unit; in a case where existence of data of an image which is to be formed is recognized after activation of the image forming apparatus before a first image forming operation, determine whether to perform the cleaning operation; and in a case where existence of data of the image which is to be formed is not recognized after the activation of the image forming apparatus before the first image forming operation, not to perform the cleaning operation.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: December 1, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Kensuke Miyahara, Toshio Furukawa
  • Patent number: 9170520
    Abstract: An image forming apparatus includes an image carrier, a charging member, a transfer member, a cleaning member and a control device configured to switch a first mode and a second mode. When executing the second mode, the control device applies a second charging bias having the same polarity as a first charging bias and having an absolute value smaller than the first charging bias to the charging member, applies a second transfer bias having the same polarity as a first transfer bias and having an absolute value smaller than the first transfer bias to the transfer member, and applies a second cleaning bias having the same polarity as the charged polarity of the toner to the cleaning member and sets a potential difference between a surface potential of the image carrier and the second cleaning bias within a predetermined range.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: October 27, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Aya Adachi
  • Patent number: 9164465
    Abstract: An image forming apparatus includes: an image bearing member configured to be forwardly and reversely rotatable; a cleaning blade configured to make contact with the image bearing member and scrape toner remaining on the image bearing member; a toner retention section defined on an upstream side of the cleaning blade in a forward rotational direction of the image bearing member, the toner retention section being configured to retain toner scraped by the cleaning blade; a driving section configured to rotationally drive the image bearing member; and a control section configured to control the driving section to reversely rotate the image bearing member by a distance greater than a distance from a position where the image bearing member and the cleaning blade make contact with each other to an upper surface position of toner retained in the toner retention section, at a time when an image formation process is not performed.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: October 20, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tomohide Mori, Yoshitada Karimai
  • Patent number: 9158268
    Abstract: A fullness detection device includes a waste toner collecting portion, a waste toner container configured to store the collected waste toner, the waste toner container has translucency, a detecting portion including a light emitting portion and a light receiving portion disposed to sandwich the waste toner container, the light receiving portion receiving the light from the light emitting portion, and a determining portion configured to determine whether or not the waste toner container is full based on whether or not an output value of the light receiving portion is higher than a predetermined threshold value. The light emitting portion increases light intensity step by step and emits light at a level of smallest light intensity among light intensity levels at which it is determined that the waste toner container is not full.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: October 13, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Haruki Sayama
  • Patent number: 9098027
    Abstract: In an image heating apparatus in which a heating rotating body heats a recording material bearing an image and a rubbing member rubs the heating rotating body to eliminate gloss streaks, an image failure, such as gloss unevenness, does not occur on normal plain paper and coated paper, and a toner gloss on the coated paper can be enhanced. A longitudinal temperature difference of a heating rotating body 91 is controlled within a predetermined temperature, so that the surface of the heating rotating body can be uniformly roughed. Consequently, an image failure due to scuffs on the surface of the heating rotating body and gloss unevenness due to unevenness of roughness of the surface of the heating rotating body are prevented, and thus a good fixed image can be obtained.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: August 4, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuhiro Hasegawa
  • Patent number: 9091985
    Abstract: The image forming apparatus includes photosensitive drums, drive motors for driving the photosensitive drums, a motor control unit for controlling operations of the drive motors, and a printer control unit. The printer control unit stops rotations of the photosensitive drums at reference positions after a print job is finished. After prescribed time elapses from the end of the print job, microscale driving of the photosensitive drums is performed for a microscale driving time period. Then, drive amounts by the drive motors during the microscale driving are calculated. At the start of a next print job, activation timing of each of the drive motors is adjusted in accordance with the drive amount so as to reduce a variation generated due to the microscale driving.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: July 28, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yousuke Hata
  • Patent number: 9086671
    Abstract: An image forming apparatus includes a control unit, which is configured to, if a developing material image transferred to another member is formed on an image carrier, obtain a print ratio that is a ratio of the area of the formed developing material image with respect to the area of a developing material image capable of being formed on a recording material that is to be printed on, and a threshold value corresponding to a consumption amount of the developing material in a image forming unit and a number of sheets printed, and control an amount of developing material that is to be supplied to a cleaning unit in accordance with the print ratio and the threshold value.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: July 21, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kimitaka Ichinose, Kazuhiro Funatani, Tetsuichiro Fujimoto
  • Patent number: 9075370
    Abstract: An image forming apparatus includes a process unit arranged in the vicinity of the circumference of each photosensitive member and the process unit is configured to act on the photosensitive member in forming a toner image thereon. The image forming apparatus detects a time period since a laser beam emission unit emits a laser beam to the photosensitive member to form an electrostatic latent image for detection until the formed electrostatic latent image for detection or a toner image based on the electrostatic latent image for detection reaches the process unit, and performs color misregistration correction control based on the result of detection. In this case, a control unit at least decreases the light amount of a pre-exposure LED when the electrostatic latent image for detection passes through a position facing the pre-exposure LED.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: July 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Hagiwara, Takamitsu Soda, Akinobu Hirayama, Hiromitsu Kumada, Yoshiko Kubo, Takateru Ohkubo
  • Patent number: 9046810
    Abstract: An image forming apparatus has an image carrying member on a surface of which a latent image is formed, a developing roller to develop the latent image on the surface of the image carrying member by providing a developer to the latent image, a smoother, an applying roller to apply the smoother to the surface of the image carrying member, and a controller to determine whether the image forming apparatus is in a waiting mode wherein the image carrying member is moved and is ready for a subsequent image forming operation. The controller controls a rotation and a stop of the rotation of the developing roller when the controller determines that the image forming apparatus is in the waiting mode.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: June 2, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventor: Hiroshi Morimoto
  • Patent number: 9045307
    Abstract: According to an embodiment, a first discharging unit and a second discharging unit discharge a sheet. A first conveying path extends from a scanning unit to the first discharging unit. A second conveying path branches off from the first conveying path at a branch point of the first conveying path and extends to the second discharging unit. A conveying member discharges the sheet to the first discharging unit when a discharging destination of the sheet is the first discharging unit, and the conveying member makes part of the sheet project from the first conveying path to the first discharging unit, locates an upstream tip end of the sheet in a sheet conveying direction, at a position downstream in the sheet conveying direction from the branch point, and conveys the sheet to switchback to the second conveying path, when the discharging destination of the sheet is the second discharging unit.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: June 2, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Yoshiaki Sugizaki, Hiroyuki Taki, Hidetoshi Yokochi, Isao Yahata, Takahiro Kawaguchi, Ken Iguchi, Kikuo Mizutani, Hiroyuki Tsuchihashi, Chiaki Iizuka, Toshiaki Oshiro, Hiroyuki Hazu, Yoichi Yamaguchi, Hiroyuki Sugiyama, Yuichi Saito
  • Publication number: 20150147074
    Abstract: A cleaner includes a cleaning member electrostatically removing toner on an object; a first electricity supplier supplying a first voltage (or current) with polarity opposite to that of toner to the cleaning member; a toner collecting member collecting toner from the cleaning member; and a second electricity supplier supplying a second voltage with the polarity greater than the first voltage to the toner collecting member. The first and second electricity suppliers set plural setting values of the first and second voltages smaller than the targeted values of the first and second voltages, and first and second control members of the first and second electricity suppliers output first and second control signals while changing in step-by-step manner so that first and second output members of the first and second electricity suppliers apply the first and second voltage in step-by-step manner before the first and second voltages reach the targeted voltages.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 28, 2015
    Inventors: Yuuji WADA, Kenji Sugiura, Naohiro Kumagai, Seiichi Kogure, Junpei Fujita, Yusuke Mitani, Kazuki Yogosawa
  • Patent number: 9037021
    Abstract: An image forming apparatus includes an image bearing member that bears a toner image; a transfer member that faces the image bearing member, nips a recording medium together with the image bearing member, and allows the recording medium to pass therebetween; a transfer-bias applying unit that applies transfer bias voltage to generate an electric field between the transfer member and the image bearing member; a cleaning member that is disposed in contact with the transfer member and removes toner from the transfer member; a cleaning-bias applying unit that applies cleaning bias voltage between the cleaning member and the transfer member; a transfer-toner-amount estimating unit that estimates an amount of toner to be transferred from the image bearing member to the transfer member when the recording medium does not pass therebetween; and a cleaning-bias controller that controls the cleaning bias voltage in correspondence with the estimated amount of toner.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: May 19, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masaaki Yamaura, Masaya Nakatsuhara, Sho Watanabe
  • Patent number: 9031430
    Abstract: An image forming apparatus includes an image bearing member, an image forming device for forming a toner image on the image bearing member, a recording material, a transfer device for transferring the toner image from the image bearing member to the recording material, a transfer belt for carrying the recording material, a first cleaning member, a second cleaning member, and a voltage control device. When continuously forming toner images on sheets of the recording material, a detection toner image is formed on the image bearing member between images to be formed on sheets of the recording material. The first cleaning member cleans the image bearing member. The second cleaning member cleans the transfer belt. The voltage control device controls the voltage applied to the transfer device so that the number of operations to clean the detection toner image is higher for the second cleaning member than the first cleaning member.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroki Takayanagi
  • Patent number: 9025985
    Abstract: An image forming apparatus determines the amount of cleaning toner that is supplied to each of an intermediate transfer belt 31 and a secondary transfer belt 42 based on the number of sheets that have been fed with the pick-up side of the sheet opposed to the intermediate transfer belt 31 and the number of sheets that have been fed with the pick-up side of the sheet opposed to the secondary transfer belt 42; integrally forms on the intermediate transfer belt 31 cleaning toner images that are supplied to each of the intermediate transfer belt 31 and the secondary transfer belt 42; and switches the application and the stop application of the transfer voltage for transferring the toner image from the intermediate transfer belt 31 to the secondary transfer roller 41 at a timing corresponding to the determined amount of toner.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: May 5, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ginga Nakamura, Susumu Murakami, Toshiki Takiguchi
  • Patent number: 9025209
    Abstract: An image forming apparatus has a control unit configured to: after an image is formed in a color mode, if an integrated supply amount is larger than or equal to a reference supply amount, cause a supply image with a first amount of developer, otherwise, cause a supply image with a second amount of developer larger that the first amount; and, after an image is formed in the monochrome mode, cause a supply image with a third amount of developer smaller than the first amount, and, to make an interval between recording materials when the supply image with the third amount is formed shorter than an interval between recording materials when the supply image with the first amount or larger is formed.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kimitaka Ichinose, Kazuhiro Funatani, Tetsuichiro Fujimoto
  • Publication number: 20150117888
    Abstract: An image forming apparatus includes image carriers, holding rollers configured to hold developer attached on the respective image carriers, a belt having a surface which contacts the image carriers and moves in a moving direction, transfer members which transfer the developer on the respective image carriers to the belt, a collection device which collects the developer on the belt, and a control device which executes a cleaning control of causing the developer held on the holding rollers to be moved to the image carriers and the collection device to collect the developer via the image carriers and the belt. The control device starts the cleaning control, suspend the cleaning control before the developer moved to the image carrier from the holding roller positioned at a most downstream side in the moving direction reaches the collection device, and resume the suspended cleaning control at a next printing preparation control.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Inventor: Mayu Wakamatsu
  • Publication number: 20150117883
    Abstract: An image forming apparatus includes an image carrier which carries thereon a developer image, a holding roller which holds thereon developer attached on the image carrier, a collection device which collects the developer on the holding roller via at least the image carrier, and a control device which executes a holding control of applying to the holding roller a holding bias having a polarity opposite to the developer such that the holding roller holds developer and a collection control of applying to the holding roller a discharge bias having a polarity same as the developer such that the developer held on the holding roller is moved to the image carrier and the collection device collects the developer via the image carrier. The control device starts the collection control at a timing after a predetermined point of time according to an estimated charge amount of the developer.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 30, 2015
    Inventors: Mayu Wakamatsu, Masatoshi Shiraki
  • Publication number: 20150117882
    Abstract: An image forming apparatus includes an image carrier, a holding roller which holds thereon developer attached on the image carrier, a transfer member which transfers a developer image on the image carrier to a transfer medium, a collection device which collects the developer on the holding roller via the image carrier, and a control device which executes a collection control of causing the developer held on the holding roller to move to the image carrier such that the collection device collects the developer via the image carrier. The control device applies to the holding roller a first discharge bias having a polarity same as the developer after the collection control starts until a first time elapses and thereafter applies to the holding roller a second discharge bias having a polarity same as the developer and having an absolute value larger than the first discharge bias.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Inventors: Mayu Wakamatsu, Masatoshi Shiraki, Daisuke Ishizuka
  • Patent number: 9014588
    Abstract: An image forming apparatus includes image forming devices which each forms a developer image on a latent image carrier, transfers the developer image onto an intermediate transfer member, and cleans the latent image carrier by using a plate-shaped cleaning member, the intermediate transfer body, and a controller. The developer used in one of the image forming devices is a low-electrostatic-propensity developer having an electrification performance lower than those of the developers used in the other image forming devices. The controller has a control mode for executing a supply operation in which the low-electrostatic-propensity developer used in the one of the image forming devices is transferred onto the intermediate transfer body and at least a part of the low-electrostatic-propensity developer is reversely transferred onto the latent image carriers of the other image forming devices and caused to reach the respective plate-shaped cleaning members.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: April 21, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Hirofumi Hamada
  • Patent number: 9008539
    Abstract: A cleaning device for cleaning a cleaning subject, having: a first cleaning member that rotates in a predetermined direction, thereby removing toner from the cleaning subject; a first collecting member that collects the toner removed by the first cleaning member; and a second collecting member that is positioned downstream from the first collecting member in the predetermined direction and collects the toner removed by the first cleaning member, in which, a potential difference of the first collecting member relative to the first cleaning member is opposite in polarity to a potential difference of the second collecting member relative to the first cleaning member, the first collecting member has a potential equal in polarity to that of the first cleaning member, and the potential of the first collecting member is greater in magnitude than the potential of the first cleaning member.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: April 14, 2015
    Assignee: Konica Minolta, Inc.
    Inventor: Takayuki Takai
  • Publication number: 20150098717
    Abstract: An electrophotographic image forming apparatus including a photoreceptor on which an electrostatic latent image is formed, a developing roller for forming a visual toner image by supplying toner onto the electrostatic latent image, a transfer unit for transferring the visual toner image onto a recording medium, and a cleaning member for removing residual toner remaining on the photoreceptor after the transfer of the visual toner image from the photoreceptor is described. The image forming apparatus operates in a printing mode, and a collecting mode in which the residual toner on the cleaning member is collected on the developing roller via the photoreceptor. A linear velocity of the developing roller in the collecting mode is faster than in the printing mode.
    Type: Application
    Filed: April 3, 2014
    Publication date: April 9, 2015
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung-min PARK, Dong-uk Kim, Ki-hyun Yoo
  • Patent number: 8995861
    Abstract: In an image forming apparatus, when no image is being formed, an image bearing member is rotated at least one rotation, in a state in which a transfer bias is controlled such that a potential on a surface of the image bearing member on the upstream side in the rotational direction of a cleaning apparatus is a polarity opposite to that of a developer.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: March 31, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuya Kitamura, Hideo Kihara, Yuji Kawaguchi, Kouki Yano, Yuta Isobe