Transfer Member Patents (Class 399/101)
  • Patent number: 10788773
    Abstract: A transfer belt according to one or more embodiments may include a surface to which a developer image is to be transferred and from which the transferred developer image is to be transferred from to a medium. The transfer belt may be configured having characteristics in which a dipole component of the surface of the transfer belt is not less than 0.3 dyn/cm and not larger than 1.9 dyn/cm.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: September 29, 2020
    Assignee: Oki Data Corporation
    Inventor: Takaaki Furukawa
  • Patent number: 10768555
    Abstract: A cleaning device includes a scraping portion whose edge is pressed against a rotational body to which toner adheres and that scrapes the toner off the rotational body, and a container that contains the toner that has been scraped off the rotational body. The container has a through-hole that opens in a portion of the container facing the scraping portion and that allows a gas to flow from an inside of the container toward the scraping portion.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: September 8, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kazuya Ogishima, Akira Shimodaira
  • Patent number: 10678175
    Abstract: An image forming device includes: an endless intermediate transfer belt; and a secondary transferrer, wherein the secondary transferrer includes a secondary transfer roller and a counter roller, a value calculated from w/Vsys is defined as a nip time N [sec], when the secondary transferrer is deemed as an equivalent circuit including a resistance R1 [?·m2] of the secondary transfer roller, a resistance R2 [?·m2] of the intermediate transfer belt, a resistance R3 [?·m2] of the counter roller, and capacitance Cmed [F/m2] of a recording medium, in a case where a combined resistance in the equivalent circuit is defined as Rtotal [?·m2], and combined capacitance in the equivalent circuit is defined as Ctotal [F/m2], a value calculated from Rtotal×Ctotal is defined as a time constant ? [sec], and the image forming device further includes: a sheet detector; and a hardware processor.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: June 9, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Eiji Tabata, Nofumi Mizumoto, Makiko Watanabe, Shigeo Uetake, Toshiya Natsuhara
  • Patent number: 10656569
    Abstract: Prevention of an image defect due to discharging in a transfer portion and ensured transfer efficiency are both achieved. A control electrode is in contact with an outer circumferential surface of a secondary transfer roller on an upstream side of a position of contact between the secondary transfer roller and a recording medium in a direction of rotation of the secondary transfer roller. The control electrode has a potential set to a repel a toner image with respect to the secondary transfer roller. The control electrode is in contact with the outer circumferential surface of the secondary transfer roller under such a condition that discharging occurs in a gap between the secondary transfer roller and the intermediate transfer belt and a discharging current flows through the recording medium.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: May 19, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Makiko Watanabe, Eiji Tabata, Nofumi Mizumoto, Toshiya Natsuhara
  • Patent number: 10642194
    Abstract: An image forming apparatus includes a chassis having an opening, a cover, photosensitive members, an intermediate transfer belt, a primary-transfer member, a secondary-transfer roller, a cleaner device, an external-sheet inlet, a waste toner container, a connector, and a conveying roller, which is arranged within the feeding path to feed the recording sheet inserted through the external-sheet inlet in the feeding path. The conveying roller is mounted on the waste toner container and removable from the chassis along with the waste toner container.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: May 5, 2020
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 10642196
    Abstract: A cleaning device has a housing where an opening and a toner storage portion are formed, a cleaning member arranged in the opening, a collection roller collecting toner attached to the cleaning member, a blade scraping off toner attached to the collection roller, a sheet member dividing between the toner storage portion and the opening, and a sealing member arranged to be in contact with the housing and both end parts of the outer circumferential surface of the collection roller in the axial direction. A first region having a predetermined surface roughness is formed in a middle part of the circumferential surface of the collection roller in the axial direction, and a second region having a lower surface roughness than the first region is formed next to both end parts of the first region in the axial direction.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 5, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoji Ueda, Yuji Kamiyama
  • Patent number: 10613455
    Abstract: An image forming apparatus includes a photoconductive drum, a primary transfer belt, a secondary transfer counter roller, a secondary transfer roller, a bias control circuit, a belt cleaner, and a processor. The photoconductive drum forms a toner image. The primary transfer belt comes in contact with the photoconductive drum and receives the toner image from the photoconductive drum. The secondary transfer counter roller moves the primary transfer belt. The secondary transfer roller presses a printing medium against the primary transfer belt to transfer the toner image on the primary transfer belt to the printing medium. The bias control circuit applies a bias to the secondary transfer roller. The belt cleaner is in contact with the primary transfer belt and removes attached matters from the primary transfer belt. When a printing operation is interrupted, a cleaning operation can be executed to remove residuals on the primary transfer belt.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: April 7, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Yasunari Miyazaki, Tomoyuki Kato
  • Patent number: 10606190
    Abstract: An intermediate transfer belt includes a surface layer with a solid lubricant added therein on an outer peripheral surface side in abutment with a photosensitive drum and a cleaning blade in a thickness direction. Further, the surface layer includes a plurality of grooves formed along a movement direction of the intermediate transfer belt in a width direction of the intermediate transfer belt. The intermediate transfer belt including the grooves satisfies J×(1/K)×L×(Q/?P)/((Q/?P)+(100/?A))<240.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: March 31, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuguhiro Yoshida, Shinji Katagiri, Takayuki Tanaka
  • Patent number: 10571823
    Abstract: In an image forming apparatus which includes a plurality of image forming units each including an image bearing member, a contact charging member, and a developer bearing member for forming toner of normal polarity, and which, in a printing operation, applies a charging bias having a first direction, in a cleaning operation, applies a charging bias having a second direction, and recovers residual toner remaining on the image bearing member which was not used for printing by the developer bearing member, before performing the cleaning operation, when successively performing the printing operation on a plurality of recording materials including a first recording material and a second recording material, which is used for printing following the first recording material, the charging voltage larger in absolute value in the printing operation for the second recording material than in the printing operation for the first recording material is applied.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: February 25, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Okubo, Masanori Tanaka, Takahiro Kawamoto, Yuji Kawaguchi, Jun Miura
  • Patent number: 10558160
    Abstract: A cleaning device cleans a surface of a toner carrier carrying a toner, and the cleaning device includes: a first blade in contact with the surface of the toner carrier; a second blade made of a material harder than a material of the first blade and in contact with the surface of the toner carrier; and a lubricant applicator that applies a lubricant to the surface of the toner carrier, wherein the first blade, the second blade and the lubricant applicator are arranged in this order from an upstream side in a moving direction of the toner carrier based on a transfer position of the toner.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: February 11, 2020
    Assignee: Konica Minolta, Inc.
    Inventor: Satoshi Nishida
  • Patent number: 10520858
    Abstract: An image forming apparatus is provided. The image forming apparatus includes a chassis having an opening, a cover, photosensitive members, an intermediate transfer belt, a primary-transfer member, a secondary-transfer roller, a cleaner device, an external-sheet inlet, a waste toner container, a connector, and a conveying roller, which is arranged within the feeding path to feed the recording sheet inserted through the external-sheet inlet in the feeding path. The conveying roller is mounted on the waste toner container and removable from the chassis along with the waste toner container.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: December 31, 2019
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 10496029
    Abstract: The image forming apparatus includes an image carrier, a transferring member and a cleaning device. The cleaning device includes a cleaning member, a case and a toner seal. A refresh mode including a first operation and a second operation is executable when an image forming operation is not performed. The first operation is executed such that the image carrier is rotated in a counter direction and for a predetermined distance or longer. The counter direction is a direction opposite to the rotation direction of the image carrier at the image forming operation. The predetermined distance is a distance from a contact position where the cleaning member comes into contact with the surface of the image carrier to a transferring position where the transferring member transfers the toner image. The second operation is executed such that the transferred body is driven and the transferring member is applied with transferring bias.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: December 3, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hiroaki Watanabe
  • Patent number: 10386757
    Abstract: A cleaning apparatus includes: a brush that contacts a transfer member and cleans and removes toner existing on the transfer member; a constant current type voltage applier that applies voltage to the brush; and a hardware processor that determines whether a condition that voltage exceeds a predetermined threshold is satisfied at a nip formed by the brush and the transfer member contacting each other, and controls the voltage by changing bias current of the voltage applier, wherein the transfer member has a sheet contact area contacting a sheet on the transfer member and an inter-sheet area other than the sheet contact area on the transfer member, and in a case where the hardware processor determines that the condition is satisfied, the hardware processor controls the voltage so as not to exceed the predetermined threshold by changing the bias current when the sheet contact area passes through the nip.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: August 20, 2019
    Assignee: Konica Minolta, Inc.
    Inventor: Nobuhiko Okano
  • Patent number: 10372077
    Abstract: The image forming apparatus includes a control unit that executes a supply operation to supply a toner charged with a regular charge polarity, to at least one abutting portion of a plurality of abutting portions, at the time of image non-formation, the plurality of abutting portions being formed by a plurality of cleaning members and a plurality of image bearing members, the control unit determining an image bearing member to which the most amount of the toner charged with the regular charge polarity is supplied, based on image formation information, the image formation information being information about an image formation executed before the supply operation is executed.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: August 6, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yusaku Iwasawa, Yasuharu Hirado, Tomoaki Nakai, Bunro Noguchi
  • Patent number: 10372071
    Abstract: An image forming apparatus includes an image bearing member, a transfer roller, a power feeding rotary member, and a controller. The controller is configured to execute the cleaning mode such that a period in which the cleaning mode is executed comprises a first application period during which a reverse polarity bias having a polarity reverse to that of the transfer bias is continuously applied to the power feeding rotary member, and a second application period during which a same polarity bias having a same polarity with that of the transfer bias is continuously applied to the power feeding rotary member.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: August 6, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yusuke Minato
  • Patent number: 10324400
    Abstract: An image forming apparatus includes a transfer member which transfers a toner image formed on an image bearing member to a transfer material; a transfer bias application unit which applies bias to the transfer member; a controller which executes a mode for making a first bias applied to a first predetermined area arranged at a leading edge of a transfer material with respect to a conveying direction of the transfer material to be less than a second bias applied to a second predetermined area arranged in a central area of the transfer material; and an obtaining portion which obtains image information of an image formed in each area obtained by dividing an area corresponding to the leading edge area into plural pieces in the width direction, wherein the controller controls the first bias based on image information obtained by the obtaining portion at the time of the mode.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: June 18, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Taisuke Matsuura
  • Patent number: 10261462
    Abstract: An image forming apparatus includes a control unit that causes a supply operation to form a predetermined toner image and supplies toner of the predetermined toner image to a contact portion between a cleaning member and a photosensitive member at a non-image forming time. During at least a period in which toner of the predetermined toner image on the photosensitive member passes through a transfer unit during the supply operation, the control unit causes application of a pass-through voltage having the same polarity as a normal charge polarity of the toner and an absolute value that is less than an electric potential of a portion that is exposed by an exposure device of the photosensitive member, or having a reverse polarity that is reverse to the normal charge polarity of the toner to be applied from the transfer power supply to the transfer member.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: April 16, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Asami, Toshiya Kaino, Ryuichi Umehara
  • Patent number: 10254683
    Abstract: An image forming apparatus includes an image carrier, a removal roller, a collection roller, a housing, a screw, and a seal. The removal roller rotates while in contact with the intermediate transfer belt and removes residual toner from the intermediate transfer belt. The collection roller rotates while in contact with the removal roller so as to collect, from the removal roller by electrostatic force, waste toner that is the residual toner removed by the removal roller. The housing has an upper opening for receiving the waste toner collected by the collection roller and stores the waste toner. The screw conveys the waste toner stored in the housing. The seal comes into contact with the collection roller and closes a gap between the collection roller and the housing at the upper opening.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: April 9, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Koichi Imanaka, Takashi Kusukawa
  • Patent number: 10222714
    Abstract: An electrophotographic photoreceptor includes: a cylindrical base body having a two-step stepped chamfer between a base body outer peripheral face and a base body end face; and a surface layer located on the base body outer peripheral face. The cylindrical base body has an outer chamfered face and an inner chamfered face lying closer to an end face than the outer chamfered face. A length L2 of the inner chamfered face is larger than a length L1 of the outer chamfered face, namely L1<L2, as viewed in lateral section taken along a rotation axis of the cylindrical base body.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: March 5, 2019
    Assignee: KYOCERA CORPORATION
    Inventor: Tomomi Fukaya
  • Patent number: 10209665
    Abstract: A cleaning device includes a blade and a seal member including a first portion having first, second and third surfaces and including a second portion having a fourth surface. The first surface opposes a free end surface of the blade. The second surface is connected with the first surface. The third surface is connected with the first and second surfaces and is perpendicular to the free end surface. The fourth surface is parallel to the third surface and the free end surface. A first interior corner line is formed by the free end surface and the third surface so as to be substantially parallel to a thickness direction of the blade. A second interior corner line is formed by the third surface and the fourth surface so as to be connected with said first interior corner line and be substantially parallel to a height direction of the blade.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isao Komatsu, Kunihiko Kitayama
  • Patent number: 10185245
    Abstract: An image forming apparatus includes a cleaning blade that is in contact with the photoconductive member to form a nip portion and that is configured to remove an adhering substance adhering to the photoconductive member and an execution unit configured to execute a supply operation of forming a supply toner on the photoconductive member to supply the supply toner to the nip portion after completion of an image forming job of forming an image on one or a plurality of printing media in a series of operations and before the photoconductive member stops rotation. The execution unit sets the amount of supply toner such that the number of images formed at the image forming job and the amount of supply toner have a linear relationship.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: January 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Ueno
  • Patent number: 10146168
    Abstract: In a belt cleaning device, a pivot member supports a first rotation shaft of a cleaning roller in a rotatable manner, and is supported by a second rotation shaft of a collection roller. An elastic member keeps the cleaning roller contact with an endless belt at a position. A first seal portion, fixed to the pivot member, is in contact with the collection roller. A housing has a first space storing the cleaning roller and the collection roller, and a second space storing waste toner rubbed off from the collection roller by a blade. The housing supports the second rotation shaft. The second seal portion is fixed to one of an inner surface of the housing and the pivot member, and is in contact with the other. The blade, the first seal portion, and the second seal portion partition the housing into the first space and the second space.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: December 4, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yoshinori Horiuchi
  • Patent number: 10139758
    Abstract: A transfer device includes a conveyance belt, a transfer roller, a stretch roller, and a cleaning member. The conveyance belt is configured to convey a sheet via a contact position with an image carrier. The transfer roller is configured to transfer the toner image onto the sheet at the contact position. The stretch roller is configured to stretch the conveyance belt at a separation position where the sheet is separated from the conveyance belt and the stretch roller is grounded via a resistance portion having electrical resistance. The cleaning member is provided to oppose the stretch roller across the conveyance belt, downstream, in a running direction of the conveyance belt, from the separation position, and is configured to attract the toner attached to a surface of the conveyance belt upon application of a voltage having a polarity opposite to the charge polarity of the toner.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: November 27, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yasuhiro Michishita
  • Patent number: 10126685
    Abstract: An image forming apparatus is provided. The image forming apparatus includes a chassis having an opening, a cover, photosensitive members, an intermediate transfer belt, a primary-transfer member, a secondary-transfer roller, a cleaner device, an external-sheet inlet, a waste toner container, a connector, and a conveying roller, which is arranged within the feeding path to feed the recording sheet inserted through the external-sheet inlet in the feeding path. The conveying roller is mounted on the waste toner container and removable from the chassis along with the waste toner container.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: November 13, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 10101689
    Abstract: An image forming apparatus charges toner on a transfer belt by using a first brush and collects the toner, in which a second brush is provided on the upstream side of the first brush, and the amount of inroad of the second brush into the transfer belt is larger than the amount of inroad of the first brush into the transfer belt.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: October 16, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yusaku Iwasawa, Tomoaki Nakai, Yu Izaki, Takateru Ohkubo
  • Patent number: 10095162
    Abstract: A cleaner includes first and second cleaning plates. The first cleaning plate includes a first free end and performs cleaning by causing the first free end to be in contact with an outer circumferential surface of a cylindrical second transfer rotating body including an elastic layer, so that the outer circumferential surface is elastically deformed. The second cleaning plate includes a second free end and performs cleaning by causing the second free end to be in contact with a portion of the outer circumferential surface downstream of, in a rotational direction of the second transfer rotating body, a position where the first free end is in contact with the outer circumferential surface and where the outer circumferential surface is elastically deformed due to the contact of the outer circumferential surface with the first free end so as to have a smallest surface curvature in the outer circumferential surface.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: October 9, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masahiro Katahira, Yoshinori Takahashi, Yuki Nagamori
  • Patent number: 10088780
    Abstract: A transfer device includes an endless belt having a surface roughness Rz ranging approximately from 0.05 ?m to 0.15 ?m and a cleaning blade that serves to clean the belt and that includes a resin substrate having a substantially planar shape and a coating layer covering at least one edge of the resin substrate, wherein the coating layer has a connection layer and a surface layer, the connection layer is disposed so as to face the interface with the resin substrate and contains diamond-like carbon and at least one selected from the group consisting of titanium nitride, titanium silicon, titanium tungsten, titanium carbide, and titanium carbonitride, and the surface layer covers the connection layer and contains diamond-like carbon.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: October 2, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masayuki Seko, Daisuke Tanaka
  • Patent number: 10048629
    Abstract: An image forming apparatus includes a voltage applying unit that applies a bias voltage for enabling a transfer unit to transfer a developer layer to a transfer medium, the developer layer being retained by an image carrier in accordance with image information; a measuring unit that measures a surface potential of the developer layer; and a setting unit that sets a value of the bias voltage to be applied by the voltage applying unit in accordance with the surface potential measured by the measuring unit, a combined electrostatic capacitance of a surface layer of the image carrier and the developer layer, and an electrostatic capacitance specific to the transfer medium.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: August 14, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Taijyu Gan, Yasufumi Suwabe, Toshihiko Suzuki
  • Patent number: 10025235
    Abstract: An image forming apparatus includes: an image holder that holds a toner image; a transferer that is disposed opposite to the image holder so as to be in contact with the image holder and transfers the toner image from the image holder onto a recording sheet that is going through a contact part where the transferer contacts the image holder, by applying a transfer voltage between the transferer and the image holder; a first power source that applies a voltage of a first polarity to the image holder; and a second power source that applies a voltage of a second polarity, which is reverse to the first polarity, to the transferer.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: July 17, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kenji Tamaki, Kenji Izumiya, Satoshi Ogata, Hidenori Mine, Hirokatsu Kodama
  • Patent number: 9989913
    Abstract: A photo conductor cleaning device removes substances adhered to a surface of a photo conductor which moves around the axis of rotation. The photo conductor cleaning device is equipped with a device main body, a tip blade, and a flexible supporting sheet metal plate which holds the tip blade and makes the tip blade contact with the photo conductor. The supporting sheet metal plate is fixed to the device main body by two fixing portions which are places at different locations, as seen from a cross section perpendicular to the axis of rotation of the photo conductor. The supporting sheet metal plate is supported at the both ends by the two fixing portions support.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: June 5, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yoshiki Nakane, Takuya Okada, Junji Murauchi
  • Patent number: 9939749
    Abstract: An image forming apparatus includes an intermediate transfer belt and a developer unit. The image forming apparatus includes a cooling unit, a cleaning roller, and an auxiliary brush. The cooling unit cools a predetermined component by sending air by a fan inside the image forming apparatus. The cleaning roller removes remaining toner on the intermediate transfer belt at an upstream side of a region facing the developer unit in a rotationally moving direction of the intermediate transfer belt and at an upstream side of a region with which the image carrier is in contact in the intermediate transfer belt. The auxiliary brush located on an outer surface of the developer unit so as to close the clearance between the intermediate transfer belt and the developer unit and is in contact with the intermediate transfer belt to clean the intermediate transfer belt.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: April 10, 2018
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Atsuhiro Wakimoto
  • Patent number: 9904231
    Abstract: An image-forming apparatus includes a main body, a belt unit detachably attachable to the main body, a coupling and a restricting part. The belt unit includes: a first roller defining an axis extending in an axial direction, a second roller opposing the first roller in a first direction perpendicular to the axial direction, and a belt looped over the first roller and the second roller. The coupling is configured to move in the axial direction to come into engagement with the first roller for inputting a drive force into the first roller. The restricting part is provided on the main body and is configured to restrict the first roller from moving in a second direction perpendicular to the axial direction and the first direction when the belt unit is attached to the main body.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: February 27, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Wataru Yamaguchi
  • Patent number: 9897943
    Abstract: A belt unit is detachably attachable to a body of an image forming apparatus. The belt unit includes a belt, a pressing member, and a frame. The belt is wound around a plurality of supports to travel in a belt travel direction. The belt includes a base layer and an elastic layer. The pressing member presses warping on an edge of the belt. The frame supports the plurality of supports. The pressing member is positioned on the frame.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: February 20, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Junpei Fujita, Naohiro Kumagai, Seiichi Kogure, Kazuki Yogosawa, Kenji Sugiura, Yuuji Wada, Yusuke Mitani
  • Patent number: 9897966
    Abstract: An image formation apparatus includes: an image carrier; a developing device which develops an electrostatic latent image formed on the image carrier as a toner image; a transfer device which transfers the toner image to a medium; a cleaning device which recovers toner remaining on the image carrier after the toner image is transferred; and a lubricant application adjustment mechanism which applies a lubricant on the image carrier and recovers toner present on the image carrier upstream of the cleaning device; and a controller which controls the lubricant application adjustment mechanism. The controller causes the lubricant application adjustment mechanism to recover more toner when the toner image formed on the image carrier has a larger image area ratio.
    Type: Grant
    Filed: May 6, 2017
    Date of Patent: February 20, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masayasu Haga
  • Patent number: 9891574
    Abstract: A high-voltage power supply that outputs high voltages having a predetermined polarity and a reverse polarity performs control in a manner that, during a transition period in which switching of a target voltage of the high voltage having the reverse polarity from the predetermined polarity is performed, a setting value in accordance with a voltage higher than a target voltage is set as the voltage having the reverse polarity, and then a setting value in accordance with the target voltage is set as the voltage having the reverse polarity.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: February 13, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Akira Tatsuzue
  • Patent number: 9880483
    Abstract: Provided is an image forming apparatus including: an image bearing member; a charging member configured to charge the image bearing member; a voltage applying device configured to apply a voltage to the charging member; and a control unit configured to control the voltage applying device so as to perform a cleaning mode for applying an AC voltage to the charging member with the voltage applying device while moving a surface of the image bearing member during non-image formation of the image forming apparatus, wherein a period of time during which the cleaning mode is performed includes a first time-period during which a first AC voltage is applied and a second time-period during which a second AC voltage is applied, and a period of the first AC voltage is different from a period of the second AC voltage.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: January 30, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takuya Kitamura
  • Patent number: 9864306
    Abstract: An image forming apparatus includes a rotatable image drum for carrying a toner image; a transfer member contacted to the drum to transfer the toner image from the drum onto a transfer member; a cleaning blade provided downstream of the transfer member with respect to a peripheral moving direction of the drum and having a free end portion contacted to the drum, the blade being configured to remove, with rotation of the drum, toner remaining on the drum after transfer of the toner image by the transfer member; and a toner retaining member cooperative with the drum to provide a toner accommodation space toner removed from the drum by the blade. The toner retaining member can retain a part of the toner accommodated in the toner accommodation space and capable of being deformed by the toner accommodated in the accommodation space to discharge the toner from the accommodation space.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: January 9, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Ueno, Motohiro Ogura, Shozo Aiba, Kengo Sato
  • Patent number: 9846394
    Abstract: A transfer apparatus includes an image bearing member, a transfer member, a cleaning-bias output section, a first resistance-state detector, a second resistance-state detector, and a controller configured to control the cleaning-bias output section based on a first resistance state and a second resistance state, so as to change timing of ending outputting of a cleaning bias.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: December 19, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Erika Sawada
  • Patent number: 9836004
    Abstract: A pressurizing device includes: first and second rollers that holds a sheet-like medium with an image bearer formed on at least part of a surface of thereof between the first and second rollers and send the medium in a conveying direction while applying a pressure to the medium; a position control unit that performs feedback control of the position of at least one of the first and second rollers; a force control unit that performs feedback control of a force acting on between the first and second rollers; and a control-method switching unit that switches, after the position of the first and second rollers is switched from a separation position to a contact position by the feedback control performed by the position control unit, a feedback controlled object so that the force becomes a target value of nip pressure through the feedback control performed by the force control unit.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: December 5, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Ken Oikawa, Minoru Takahashi
  • Patent number: 9835985
    Abstract: An image forming apparatus includes a member-to-be-cleaned, a first cleaner unit including a first attracting member, a first rotatable member and a first blade member, a second cleaner unit including a second attracting member, a second rotatable member and a second blade member, and a feeding member. The feeding member rotates around its rotational axis and is provided vertically below a first position where a toner drops by gravitation and a second position where the toner drops by gravitation. The feeding member is disposed such that vertical lines passing through the first position and the second position cross the feeding member.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: December 5, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takehiro Kishi
  • Patent number: 9835987
    Abstract: An image forming apparatus includes an image bearer; a toner image forming device; an intermediate transferor; a primary transfer power source; a secondary transfer nip forming device; and a secondary transfer power source to output a secondary transfer bias. One of two peak values of the secondary transfer bias is a transfer peak value to provide a greater transfer-directional force to move toner from the intermediate transferor toward the recording medium in the secondary transfer nip. An absolute value of the transfer peak value is greater than an absolute value of the primary transfer bias.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: December 5, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Sugiura, Hiroyoshi Haga, Hirokazu Ishii, Naohiro Kumagai, Seiichi Kogure, Junpei Fujita, Takehide Mizutani, Yuuji Wada, Naoto Kochi, Tatsuya Ohsugi, Kazuki Yogosawa
  • Patent number: 9836013
    Abstract: An image forming apparatus includes: an image bearing member that is rotatable and supplied with toner to which lubricant has been added; a first cleaning section configured to remove the toner remaining on the image bearing member; a second cleaning section configured to remove the toner remaining on the image bearing member and left without being removed by the first cleaning section; and a control section that performs control to change removing performance in the first cleaning section.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: December 5, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Hideaki Tanaka
  • Patent number: 9829835
    Abstract: An image forming apparatus of the present disclosure includes a plurality of image forming portions, an intermediate transfer unit, a secondary transfer member, a belt cleaning device, and a control portion. The intermediate transfer unit includes an intermediate transfer belt, a plurality of primary transfer members, a drive roller, a tension roller, and a contacting/separating mechanism. The belt cleaning device includes a cleaning member which faces the tension roller with the intermediate transfer belt therebetween. In a withdrawal mode, the cleaning member is moved by pressing force of the tension roller further into a housing from an opening portion as compared with in a printing mode. The control portion is capable of executing, while image formation is not being performed, a transfer toner collection mode in which the intermediate transfer belt and the belt cleaning device are driven in the withdrawal mode.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: November 28, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Keisuke Oba, Satoshi Uemura, Kenji Miyamoto
  • Patent number: 9817341
    Abstract: An image forming apparatus includes a plurality of image bearers, a transfer bias member, and a power source. When the transfer bias member transfers a color toner image onto a recording sheet, a second peak value of a peak-to-peak of a transfer bias, which is smaller than a first peak value of the peak-to-peak in an electrostatic force to move toner from the image bearers or an intermediate transfer body to the recording sheet, is zero or has a first polarity to generate the electrostatic force in a transfer direction to move toner from the image bearers or the intermediate transfer body to the recording sheet. When the transfer bias member transfers a monochromatic toner image including only black toner onto the recording sheet, the second peak value is zero or has a second polarity to generate an electrostatic force in an opposite direction to the transfer direction.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: November 14, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohsugi, Kenji Sugiura, Hirokazu Ishii, Hiroyoshi Haga, Naohiro Kumagai, Seiichi Kogure, Takehide Mizutani, Junpei Fujita, Yuuji Wada, Kazuki Yogosawa, Naoto Kochi
  • Patent number: 9811046
    Abstract: An image forming apparatus includes a rotatable image bearer, a toner image forming device, a transfer device, a transfer bias power source, and a cleaner. The toner image forming device is to form a toner image on the image bearer. The transfer device contacts a surface of the image bearer to form a transfer nip between the transfer device and the image bearer. The transfer bias power source is to output a transfer bias to transfer the toner image from the image bearer onto a recording medium in the transfer nip. The cleaner is disposed downstream from the transfer nip in a direction of rotation of the image bearer, to electrostatically attract and remove toner from the surface of the image bearer to a surface of the cleaner. The transfer bias includes an alternating current component.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: November 7, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuji Wada, Naohiro Kumagai, Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa, Kenji Sugirua, Takehide Mizutani, Tatsuya Ohsugi, Hiroyoshi Haga, Hirokazu Ishii
  • Patent number: 9760041
    Abstract: An image forming apparatus includes a movable intermediary transfer member, a toner image forming unit, a rotatable transfer member, a fixing unit, a recording material feeding portion, an executing portion, and first and second cleaning units. The first cleaning unit includes a first brush roller, a first rotatable member and a first blade member. The second cleaning unit includes a second brush roller, a second rotatable member, a second blade member and a third blade member. The third blade member is disposed downstream of the cleaning portion and upstream of a contact portion, between the second rotatable member and the second brush roller, with respect to a rotational direction of the second rotatable member, and scrapes a deposited matter off the second rotatable member with the rotation of the second rotatable member.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: September 12, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Haruhiko Omata, Akihiro Noguchi, Tatsuomi Murayama, Yasuki Kamimori
  • Patent number: 9696662
    Abstract: A cleaning device includes an upstream cleaner, an upstream cleaner, and a collection member. The upstream cleaner is configured to remove toner from a surface of a cleaning target. The downstream cleaner is disposed downstream from the upstream cleaner in a direction of movement of the surface of the cleaning target. The downstream cleaner is configured to remove toner from the surface of the cleaning target. The collection member is configured to collect toner from the downstream cleaner.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: July 4, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuki Yogosawa, Mitsuru Takahashi, Hiroyoshi Haga, Kenji Sugiura, Naohiro Kumagai, Seiichi Kogure, Kenji Sengoku, Takehide Mizutani, Junpei Fujita, Yuuji Wada, Tatsuya Ohsugi
  • Patent number: 9690234
    Abstract: An image forming apparatus is provided. The image forming apparatus includes a chassis having an opening, a cover, photosensitive members, an intermediate transfer belt, a primary-transfer member, a secondary-transfer roller, a cleaner device, an external-sheet inlet, a waste toner container, a connector, and a conveying roller, which is arranged within the feeding path to feed the recording sheet inserted through the external-sheet inlet in the feeding path. The conveying roller is mounted on the waste toner container and removable from the chassis along with the waste toner container.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: June 27, 2017
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 9690236
    Abstract: A transfer device includes a transfer unit including an image carrier that carries a toner image to be transferred to a transfer surface of a recording medium, a transfer member disposed on a non-transfer-surface side of the recording medium, and an opposing member disposed opposite the transfer member with the image carrier therebetween; a cleaning unit that cleans a surface of the transfer member; a first application unit that applies a voltage, for transferring the toner image, to the opposing member; and a second application unit that applies an alternating voltage to the transfer member.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: June 27, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yukiko Miyakoshi
  • Patent number: 9606477
    Abstract: An image forming apparatus including a cleaning member having a belt cleaning blade and a conductive brush. A value of a charging current that is generated when charging residual toner with the conductive brush is smaller when a color mode is executed compared to that when a monochrome mode is executed.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: March 28, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasutaka Yagi, Kazuhiro Funatani, Tetsuichiro Fujimoto, Hiroyuki Seki, Masanori Asai, Shuji Saito