Developer Seal Patents (Class 399/103)
  • Patent number: 11150578
    Abstract: A developing device includes a developing container, a first stirring member and a second stirring member, and a developing roller. The developing container includes a first stirring chamber, a second stirring chamber, and a communication portion. The first stirring member includes a reverse spiral vane that conveys a developer in a direction reverse to a circulation direction. An air discharge duct is formed on a wall portion of the first stirring chamber opposed to the reverse spiral vane and in an area excluding the communication portion and discharges air from the first stirring chamber to an outside of the developing container via an air discharge port at a distal end of the air discharge duct. A filtration portion is disposed in the air discharge duct adjacently to the air discharge port and restricts leakage of the developer through the air discharge port.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: October 19, 2021
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Minoru Wada, Yuji Kamiyama, Ikuo Makie, Yu Sasaki, Yukari Ota, Ryo Yamada
  • Patent number: 11112753
    Abstract: A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: September 7, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuya Kawakami, Noriyuki Komatsu, Tetsuya Numata, Naoya Asanuma, Daisuke Makiguchi
  • Patent number: 11073789
    Abstract: A drum cleaner in a drum unit removes toner from a photosensitive drum. A waste-toner conveyance pipe has a waste-toner discharge port and conveys toner removed from the photosensitive drum by the drum cleaner. A toner accommodation chamber accommodates toner to be supplied to a developing roller. A waste-toner accommodation chamber accommodates toner removed from the photosensitive drum. A toner cartridge rotatably moves relative to the drum unit between: a first position at which a waste-toner receiving port is separated from the waste-toner discharge port in a state where the toner cartridge is mounted on the drum unit; and a second position at which an internal space of the waste-toner accommodation chamber is in communication with an internal space of the waste-toner conveyance pipe through the waste-toner discharge port and the waste-toner receiving port in a state where the toner cartridge is mounted on the drum unit.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: July 27, 2021
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Shougo Sato, Hideshi Nishiyama
  • Patent number: 10983458
    Abstract: Conventionally, when a developer is supplied into a developer receiving apparatus from a developer supply container using the air, a filter is provided in the developer receiving apparatus side, but the pressure feeding type wherein a mixture of the air and the developer is continuously fed from the developer supply container into the developer receiving apparatus side involves a problem of filter clogging. The developer supply container side is provided with a pump portion which effects a suction operation for moving the air from inside of the developer receiving portion to the developer accommodating portion side and a discharging operation for moving the air from the inside of the developer accommodating portion to the developer receiving portion side. By this, a back washing effect of dusting the developer from the filter is applied to the filter portion during the suction operation, so that the clogging of the filter is suppressed.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: April 20, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ayatomo Okino, Toshiaki Nagashima, Katsuya Murakami, Fumio Tazawa, Yusuke Yamada
  • Patent number: 10969708
    Abstract: A developing device includes a developing roller to rotate in a predetermined direction of rotation and opposed to or in contact with an image bearer to form a development range, a cover to cover the developing roller downstream from the development range in the predetermined direction of rotation, a sheet member cantilevered by the cover to contact the developing roller with a flat face of the sheet member while trailing along the predetermined direction of rotation at a position downstream from the development range. The cover includes a large gap portion to form a first gap in a first predetermined range in the predetermined direction of rotation and a small gap portion disposed adjacent to and downstream from the large gap portion in the predetermined direction of rotation to form a second gap smaller than the first gap in a second predetermined range in the predetermined direction of rotation.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: April 6, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuya Suganuma, Tatsuya Kubo
  • Patent number: 10962900
    Abstract: A seal member includes a first seal portion abutting an end portion of a rotating body to seal a gap between a storage container and the end portion, and a second seal portion abutting an end portion of a blade to seal a gap between the storage container and the end portion. The second seal portion has a tip contacting portion to contact a tip portion of the blade and a non-tip contacting portion to contact a portion of the blade except for the tip portion. The non-tip contacting portion is recessed to form a step between the non-tip contacting portion and the tip contacting portion. The tip contacting portion includes a base portion to contact with the storage container, an abutting portion configured to abut the blade, and a connecting portion which connects the base portion and the abutting portion to each other.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 30, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroomi Matsuzaki, Kazuki Matsumoto, Hiraku Sasaki
  • Patent number: 10901343
    Abstract: A developing device includes first and second chambers, a developing roller, first and second mixers, and one or more removable seals. The developing roller is in the first chamber. The first mixer is in the first chamber and configured convey developer in a first direction along a rotational axis of the developing roller. The second chamber is connected to the first chamber via a first port and a second port that are spaced apart from each other in the first direction. The second mixer is in the second chamber and configured to convey developer in a second direction opposite to the first direction. The one or more removable seals cover the first and second ports. A developer is contained in one of the first or second chambers. A developer discharge port is provided on the other one of the first or second chambers.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: January 26, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Koji Imamiya, Masayuki Kasukawa
  • Patent number: 10866539
    Abstract: A unit includes: a conveying member that conveys developer; a frame that stores the developer and includes a first chamber storing the conveying member, a second chamber, a first opening connecting the first chamber and the second chamber, and through which the developer is passed, and a second opening connecting the interior of the second chamber and the exterior of the frame in an orthogonal direction that is orthogonal to a direction of a rotation axis line of the conveying member; and a filter that allows air to pass the second opening and restricts the developer from passing the second opening, and is fixed to the frame, wherein the frame is displaceable with respect to an apparatus main body in a state where the unit is attached to the apparatus main body, and the filter is displaced with respect to the apparatus main body by the displacement of the frame.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: December 15, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisashi Taniguchi, Takayoshi Kihara, Shuhei Kawasaki, Shota Nakamura
  • Patent number: 10831131
    Abstract: A developer unit for an electrophotographic image forming device includes a developer roll rotatably mounted on a housing. The developer roll includes a shaft defining a rotational axis and a roll body cylindrically disposed around the shaft to form an outer circumferential surface of the developer roll. An end seal includes a curved rotary seal portion sandwiched between a pocket portion of the housing and the outer circumferential surface of the developer roll, such that an outer circumferential surface of the curved rotary seal portion contacts the pocket portion of the housing and an inner circumferential surface of the curved rotary seal portion contacts the outer circumferential surface of the developer roll. The pocket portion of the housing includes protrusions that contact the outer circumferential surface of the curved rotary seal portion to restrict movement of the end seal along an operative rotational direction of the developer roll.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: November 10, 2020
    Assignee: Lexmark International, Inc.
    Inventors: Gregory Alan Cavill, Richard Louis Goin
  • Patent number: 10739697
    Abstract: A developing device according to an embodiment includes a housing, a developing roller, a gap forming member, and a guide section. The gap forming member forms a first gap between the gap forming member and the developing roller. The gap forming member forms a second gap between the gap forming member and the housing. The second gap includes an upstream side opening on a rotating direction upstream side of the developing roller. The guide section directs an air current discharged from the second gap via the upstream side opening to the first gap. A relation of H1/H2<5 is satisfied, where H1 is a minimum interval between the developing roller and the gap forming member in the first gap and H2 is a minimum interval between the housing and the gap forming member in the second gap when viewed from an axial direction of the developing roller.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: August 11, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Masato Ogasawara
  • Patent number: 10732566
    Abstract: A drum cleaner in a drum unit removes toner from a photosensitive drum. A waste-toner conveyance pipe has a waste-toner discharge port and conveys toner removed from the photosensitive drum by the drum cleaner. A toner accommodation chamber accommodates toner to be supplied to a developing roller. A waste-toner accommodation chamber accommodates toner removed from the photosensitive drum. A toner cartridge rotatably moves relative to the drum unit between: a first position at which a waste-toner receiving port is separated from the waste-toner discharge port in a state where the toner cartridge is mounted on the drum unit; and a second position at which an internal space of the waste-toner accommodation chamber is in communication with an internal space of the waste-toner conveyance pipe through the waste-toner discharge port and the waste-toner receiving port in a state where the toner cartridge is mounted on the drum unit.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: August 4, 2020
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Shougo Sato, Hideshi Nishiyama
  • Patent number: 10691043
    Abstract: A supporting unit for supporting a rotatable member to feed a developer includes a frame including a first surface extending in a direction crossing an axis of the rotatable member and a second surface extending in a direction crossing the first surface, and a fixed member. The fixed member includes (i) a first opposing surface opposing and contacting the first surface, (ii) a second opposing surface opposing the second surface, and (iii) a first front side surface opposite from the second opposing surface. The second opposing surface is welded to the second surface by ultrasonic spot welding such that a first recess is formed on the first front side surface.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: June 23, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoki Maeda, Tetsuya Numata, Makoto Hayashida
  • Patent number: 10684572
    Abstract: A developing device includes a housing including a development opening and a containing unit that contains a developer, a developer carrier that rotates to pass through the development opening while holding the developer in the containing unit of the housing, an inlet portion of a flow path located in the housing at a portion including a downstream edge portion of the development opening on a downstream side in a rotation direction of the developer carrier, the inlet portion taking in part of an airflow caused by a rotation of the developer carrier to allow the part of the airflow to flow over an outer surface of the housing, and a guide member extending toward the developer carrier from a portion of the housing on a side of the inlet portion opposite to the development opening to guide the part of the airflow to the inlet portion.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: June 16, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takafumi Wakai, Takashi Akaike
  • Patent number: 10663881
    Abstract: A developing device includes a toner holding member that rotates while holding a toner on an outer peripheral surface of the toner holding member and develops an electrostatic latent image formed on an image carrier, a control member that controls a thickness of a layer of the toner formed on the outer peripheral surface of the toner holding member, a suppression member that has an end pressed against the image carrier and that suppresses leakage of the toner, a collecting member that is provided above the control member and that does not allow the toner flowing in a direction from the control member toward the collecting member to pass through the collecting member while allowing a gas to pass through the collecting member, and a containing chamber that contains the toner falling from the collecting member.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: May 26, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takafumi Wakai, Takashi Akaike
  • Patent number: 10649371
    Abstract: The developing device includes a developer bearer, a conveyor, a casing including a ceiling, and a seal. The developer bearer is configured to bear a developer and develop a latent image. The conveyor is configured to convey and stir the developer. The casing is configured to contain the developer, the developer bearer, and the conveyor. The seal is configured to seal the inside of the casing to form a closed space that encloses the developer in the developing device. The conveyor is configured to be partially or entirely buried in the developer enclosed in the closed space in both of a normal posture and an upside-down posture of the developing device. A cross-sectional area of the closed space in a horizontal plane gradually increases from a top of the ceiling of the casing toward a bottom of the developing device in the normal posture of the developing device.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: May 12, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Kei Saito, Yoshiyuki Fukuda, Masaaki Yamada, Yuuji Ishikura
  • Patent number: 10613454
    Abstract: A developing device includes: a container for accommodating developer, the container having an exhaust port; and a merging section where airflows directed from the interior of the container to the exhaust port join together.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: April 7, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Ayumi Noguchi, Shinichi Kuramoto, Norihiro Tamazawa, Yoshitaka Nakajima, Tomoyuki Yoshii, Masanori Kato, Ryota Tomishi
  • Patent number: 10534291
    Abstract: An image forming system includes an image carrier to rotate, a developer carrier to rotate, a container to contain the developer carrier, and a developer retainer separated from the rotatable developer carrier by a first gap of closest proximity, separated from the rotatable image carrier by a second gap of closest proximity, and separated from the container by a third gap of closest proximity. The first gap is less than the second gap and the third gap.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: January 14, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Naoya Iwata, Satoshi Muramatsu, Tadao Mori
  • Patent number: 10481522
    Abstract: A developing device includes a developing roller and a layer thickness regulating member. The developing roller includes a fixed magnet and a sleeve. The layer thickness regulating member includes a regulating body portion and an upstream regulating portion, and the upstream regulating portion includes an upstream magnetic member and a nonmagnetic member. Developer is hardly strongly jammed in an area between a first magnetic field concentration point of the regulating body portion and a second magnetic field concentration point of the upstream regulating portion. Thus, even if the sleeve of the developing roller is rotated at a higher speed than before, the developer is stably regulated by the layer thickness regulating member.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: November 19, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tamotsu Shimizu, Yasuhiro Tauchi, Akifumi Yamaguchi
  • Patent number: 10452002
    Abstract: A developing device includes a rotatable developer bearing member, a regulation member configured to regulate a thickness of the developer borne on the surface of the developer bearing member, a frame configured to support the developer bearing member, the frame including a recess in an opposed surface opposed to the regulation member, the recess being recessed in a direction away from the regulation member and extending from a center portion toward both end portions in the rotation axis direction, a width, in the orthogonal direction, of the recess in both the end portions increasing gradually as distance from the center portion in the rotation axis direction increases, and a sealing member provided in the recess to seal a gap between the regulation member and the frame, the sealing member being formed by ejecting thermally molted resin into the recess.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: October 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Fujiwara, Naoki Maeda, Daisuke Makiguchi
  • Patent number: 10451996
    Abstract: A developing device includes a developer bearing member, a developer container, a regulating blade including a plate-like elastic portion, and an elastic seal sealing, and a pressing member pressing the elastic seal, wherein the plate-like elastic portion includes a metal plate, a second projection projecting from a second surface of the metal plate facing the developer bearing member, and a first projection projecting from a first surface opposite to the second surface of the metal plate, and wherein a projecting amount of the first projection is greater than a projecting amount of the second projection, wherein a top surface of the second projection contacts the surface of the developer bearing member, and an end surface of the first projection contacts an end surface of the elastic seal in the rotation axis direction.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: October 22, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shohei Katsuya, Yoshiyuki Batori, Hiroshi Takarada, Koji Wada, Goshi Ozaki
  • Patent number: 10423095
    Abstract: A developing apparatus includes a developer bearing member bearing and feeding developer including toner and carrier, a first feeding screw arranged in a first chamber and feeding the developer in a first direction, and a second feeding screw arranged in a second chamber and including a first blade portion feeding the developer in a second direction, a second blade portion arranged downstream of the first blade portion and feeding the developer in the first direction, and a third blade portion arranged downstream of the second blade portion. A sealing sheet is arranged upstream of a developer discharging portion and seals initial developer contained in a developing container; and an unsealing mechanism unseals the sealing sheet sealing the initial developer, wherein the sealing sheet is arranged downstream of the second blade portion and upstream of the third blade portion in the second direction.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: September 24, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masafumi Takahashi, Hitoshi Kubota, Yohei Gamo
  • Patent number: 10401781
    Abstract: A drum cleaner in a drum unit removes toner from a photosensitive drum. A waste-toner conveyance pipe has a waste-toner discharge port and conveys toner removed from the photosensitive drum by the drum cleaner. A toner accommodation chamber accommodates toner to be supplied to a developing roller. A waste-toner accommodation chamber accommodates toner removed from the photosensitive drum. A toner cartridge rotatably moves relative to the drum unit between: a first position at which a waste-toner receiving port is separated from the waste-toner discharge port in a state where the toner cartridge is mounted on the drum unit; and a second position at which an internal space of the waste-toner accommodation chamber is in communication with an internal space of the waste-toner conveyance pipe through the waste-toner discharge port and the waste-toner receiving port in a state where the toner cartridge is mounted on the drum unit.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: September 3, 2019
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Shougo Sato, Hideshi Nishiyama
  • Patent number: 10386751
    Abstract: A cleaning unit includes a cleaning frame, a drum, a sheet member coming in contact with a surface of the drum, and an adhesive sealing member compressed between the cleaning frame, the drum, and the sheet member. The cleaning unit includes an end seal portion that is integrally molded with the cleaning frame by injection molding of a resin material, and the end seal portion is compressed and deformed between the cleaning frame and the adhesive sealing member and between the cleaning frame and the sheet member.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: August 20, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Hayashi, Shigemi Kamoshida, Shunsuke Uratani, Toshiteru Yamasaki
  • Patent number: 10379489
    Abstract: A process unit includes a drum frame supporting a photoconductor drum and a development frame supporting a development roller. The development cartridge is swingably supported by the drum frame at a coupling joint provided at a first side of the development frame and a support portion provided at a second side of the development frame. A center of rotation of the development roller is located in a position shifted from a line segment connecting a center of rotation of the coupling joint and a center of rotation of the photoconductor drum to an upstream side with respect to a direction of rotation of the coupling joint as viewed in an axial direction of the development roller, such that the development roller is pressed against the photoconductor drum by the action of the rotatory force received by the coupling joint.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: August 13, 2019
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masatoshi Shiraki, Hiroki Mori
  • Patent number: 10379462
    Abstract: A developer supply container is detachably mountable to a developer receiving apparatus, which includes a developer receiving portion for receiving a developer, and a filter for permitting venting of the developer receiving portion in and out. The developer supply container includes a developer accommodating portion for accommodating a developer, a discharge opening for permitting discharging of the developer from the developer accommodating portion toward the developer receiving portion, a driving force receiving portion for receiving a driving force from the developer receiving apparatus, and a pump portion capable of being driven by the driving force received by the driving force receiving portion to alternate repeatedly a discharging operation and a suction operation through the discharge opening while venting into and out of the developer receiving portion through the filter.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 13, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ayatomo Okino, Toshiaki Nagashima, Katsuya Murakami, Fumio Tazawa, Yusuke Yamada
  • Patent number: 10365586
    Abstract: A developer unit for an electrophotographic image forming device includes a developer roll rotatably mounted on a housing. The developer roll includes a roll body cylindrically disposed around a shaft and forming an outer circumferential surface of the developer roll. An axial end of the roll body includes an undercut forming a hollow region in the axial end of the roll body. An elastomeric end seal has a curved rotary seal portion that is sandwiched between a portion of the housing and the outer circumferential surface of the developer roll at the axial end of the developer roll. An interference between the curved rotary seal portion of the end seal and the outer circumferential surface of the developer roll decreases along an axial dimension of the developer roll in a direction from an axially outboard edge of the end seal toward an axially inboard edge of the end seal.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: July 30, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Richard Louis Goin, Donald Wayne Stafford
  • Patent number: 10365587
    Abstract: A developing apparatus includes: a developing roller; a frame configured to support the developing roller at each of two end portions of the developing roller in a longitudinal direction of the developing roller; and a sealing member configured to seal a space between the frame and each of the two end portions of the developing roller. A first lubricant having an average particle size smaller than a predetermined surface roughness Ra is applied to a first region that is located at each end portion of the developing roller in the longitudinal direction and is in contact with the sealing member. A second lubricant having an average particle size larger than the surface roughness Ra is applied to a second region that is located on an inner side of the first region in the longitudinal direction and is separated from the sealing member and has the surface roughness Ra.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: July 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Go Shindo, Daisuke Baba
  • Patent number: 10345756
    Abstract: A process cartridge of an image forming apparatus includes a seal member to seal a first gap between an end portion of a developer bearing member and a frame, and a sealing portion that seals a second gap between the frame and an end portion of the seal member. The frame includes an injection inlet through which elastomer has been injected into the second gap for forming the sealing portion, a storage portion that is a space surrounded by a second surface of the frame and a wall protruding from the second surface and in which elastomer spilling out of the second gap is stored, and a protruding portion that protrudes, from the second surface of the frame, further than the wall of the storage portion. The protruding portion contacts a conveyed recording medium when the process cartridge is mounted in an apparatus main body of the image forming apparatus.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: July 9, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoki Matsumaru, Daisuke Makiguchi, Go Torii
  • Patent number: 10310416
    Abstract: A seal member 14 which seals a gap among a rotating body 9 provided in an opening of a frame body 13, a blade 18a, and the frame body 13 in an end region in an axial direction of the rotating body 9, the seal member 14 including: a first seal portion 14b which comes into contact with the rotating body 9; a second seal portion 14e which comes into contact with the blade 18a; and a third seal portion 14f which is constituted by a surface formed in a stair shape and sequentially arranged between the first seal portion 14b and the second seal portion 14e and which is capable of reducing a gap formed between the rotating body 9 and the blade 18a due to rotation of the rotating body 9.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: June 4, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiraku Sasaki, Hiroomi Matsuzaki, Kazuki Matsumoto
  • Patent number: 10295934
    Abstract: A toner container includes containing chambers, a shaft member, rotary members, and stirring members. The containing chambers are arrayed in a first direction and partitioned from each other. The containing chambers contain respective toners of different colors. The shaft member extends in the first direction, passes through the containing chambers, and is rotatable about a rotational axis extending in the first direction. The rotary members are disposed in the respective containing chambers and each have a through-hole extending in the first direction. The rotary members are rotatable in response to rotation of the shaft member in an inserted state of the shaft member in the through-holes. The stirring members are supported by the respective rotary members and each extend in a second direction intersecting the first direction. The stirring members are pivotable in response to rotation of the respective rotary members. The stirring members have different pivoting positions upon pivoting.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: May 21, 2019
    Assignee: OKI DATA CORPORATION
    Inventor: Shun Hatanaka
  • Patent number: 10254694
    Abstract: A control unit of an image forming apparatus controls, in an image forming mode, a potential difference obtained by subtracting the voltage applied to the developer bearing member from the voltage applied to the regulating member so that the potential difference is set to the polarity of the developer, and the control unit controls, in a lubricant discharge mode, the potential difference obtained by subtracting the voltage applied to the developer bearing member from the voltage applied to the regulating member so that the potential difference is set to the polarity of the lubricant or “0”.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: April 9, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Miura, Kazuhiro Okubo, Takahiro Kawamoto, Yuji Kawaguchi, Masanori Tanaka
  • Patent number: 10248050
    Abstract: A developing device includes a developing container, a rotatable developer carrying member, and a magnetic field generator. Magnetic members are provided at end portions of the developer carrying member with a gap to an outer peripheral surface of the developer carrying member, and magnet members are provided opposed to the magnetic members so as to magnetize the magnetic members. The outer peripheral surface of the developer carrying member includes a first region including a developing region corresponding to an image forming region and a second region outside and adjacent to the first region and having lower developer feeding power than the first region or having substantially no feeding power. The first region is larger than a region between outside surfaces of the magnetic members and is smaller than a region between inside surfaces of the magnet members.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: April 2, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masanori Akita, Yushi Sadamitsu
  • Patent number: 10222720
    Abstract: In an image forming apparatus, a seal member is a non-conductive, flexible member supported by a developing device. The seal member is formed to project from an edge part of the developing device that faces an image carrying member, along a longitudinal direction of the image carrying member. The seal member fills a part of a gap between the developing device and an outer circumferential surface of the image carrying member. An electrode film is adhered to a surface of the seal member. The electrode film is a conductive film. A potential detecting device detects a potential of the electrode film. A charging controller controls a charging voltage based on a result of comparison between a predetermined reference potential and the potential detected by the potential detecting device.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: March 5, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Norio Tomiie
  • Patent number: 10209645
    Abstract: A developing device includes a casing to contain developer, a developer bearer, an upper and lower developer conveyors to convey the developer to one side in an axial direction of rotation shafts thereof, a communicating portion disposed on a first end side on which an input gear is disposed, to fall the developer from the upper developer conveyor to the lower developer conveyor, bearings to receive end portions the upper and lower developer conveyors, and first and second end seals to seal gaps in the bearings on the upper and lower developer conveyors, respectively. The first end seals and the second end are disposed on the first end side and a second end side, respectively. A sliding friction between the rotation shaft and at least one of the first end seals is smaller than a sliding friction between the rotation shaft and the second end seal.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: February 19, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuuki Tsuchiya, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Tatsuya Ohhira
  • Patent number: 10120302
    Abstract: An example device, for sealing an ink developer unit in accordance with aspects of the present disclosure includes a rigid plate. The device also includes a first compliant sealing member disposed on a first side of the rigid plate to form a seal between the number of rollers of the ink developer unit and the rigid plate. The device also includes a second compliant sealing member disposed on a second side of the rigid plate to form a seal between the rigid plate and an end cap of the ink developer unit. The first compliant sealing member, the second compliant sealing member, or combinations thereof include a developer roller arm aligned with an interior portion of a developer roller face and to allow ink to contact the developer roller face.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: November 6, 2018
    Assignee: HP Indigo B.V.
    Inventors: James Pingel, Christopher S Tanner, Evgeny Korol
  • Patent number: 10095175
    Abstract: A developer roll includes end seal regions subject to accumulating residual toner. An adjacent photoconductive member has a longitudinal extent with a central area defining an imaging region and longitudinal ends outside the central area defining non-imaging regions. The photoconductive member has a length extending beyond a length of the developer roll so that the end seal regions of the developer roll contact the non-imaging regions of the photoconductive member. During cleaning, the non-imaging regions become charged and discharged to electrostatically attract and transfer away the toner from the end seal regions. A blade scrapes clean the toner from the photoconductive member.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: October 9, 2018
    Assignee: Lexmark International, Inc.
    Inventors: Brian Scott Carpenter, Randall Lee Hudson, John Lemaster
  • Patent number: 10095160
    Abstract: An image forming apparatus includes a developing apparatus including a housing having a supply opening to receive developer supplied by a pump unit, a developing device screw disposed in a discharge path of the housing to supply and discharge the developer through a discharge opening to an image bearing member, and a developer bearing portion having a magnetic body that generates a magnetic force and is configured to bear the developer with a carrying force working in a substantially perpendicular direction to the magnetic force. In addition, a developer accommodation portion within the housing accommodates the developer supplied from a supply opening and has no opening other than the supply opening and the discharge opening, with the developer accommodation portion having a space volume capable of suppressing a spouting force caused by an inner pressure increase due to operation of the pump unit.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: October 9, 2018
    Assignee: CANON FINETECH NISCA INC.
    Inventors: Ryosuke Kosone, Ryo Nakajima, Naoki Tamaru
  • Patent number: 10031440
    Abstract: A developing device includes a supply member, a developing device body, and a closing member. The supply member supplies a developer to an image holding element that holds a developer image. The developing device body rotatably supports the supply member. The closing member closes a clearance formed between the developing device body and the supply member with one end of the closing member fixed to the developing device body and the other end, which is a free end, contacting the supply member. The closing member has plural grooves formed to extend from the other end toward the one end.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: July 24, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takashi Nakamura, Takashi Sakamoto, Munenobu Okubo, Takafumi Wakai
  • Patent number: 10001727
    Abstract: A fixing portion 18c for suppressing movement of a developer bag 16 when the developer bag 16 is unsealed by moving a sealing member 19 is provided. By this, unsealing becomes easy.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: June 19, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroomi Matsuzaki, Junichi Matsumura, Kazuki Matsumoto, Tatsuo Fujisaki, Kojiro Yasui
  • Patent number: 9996032
    Abstract: The disclosed structure includes a belt-shaped conveying member configured to convey developer. The conveying member includes a partitioning portion, which is a partition for developer contained in a casing with respect to a conveying direction in which the developer is conveyed, wherein, when the developer container is new, a first developer amount which is an amount of the developer contained at an upstream side that is upstream of the partitioning portion in the conveying direction, is larger than a second developer amount which is an amount of the developer contained at a downstream side that is downstream of the partitioning portion in the conveying direction.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: June 12, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shunsuke Mizukoshi, Kazuhisa Shida, Takayuki Kanazawa, Yuta Isobe, Makoto Tokudome
  • Patent number: 9971298
    Abstract: An image forming apparatus in which a developer bearing member is disposed below a cleaning member, which cleans a charging member, so as to overlap with the cleaning member when viewed in a vertical direction and includes a base body and an elastic layer covering the base body and having a width in a longitudinal direction of the developer bearing member that accommodates the entire region of the cleaning member in the longitudinal direction. In the longitudinal direction, the cleaning member is disposed at a position where the entire region thereof in the longitudinal direction is accommodated in the width of the elastic layer.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: May 15, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihisa Matsukawa, Toshiki Okamura, Kuniaki Tamagaki, Takanori Watanabe, Hiroyoshi Iwayama, Makoto Tokudome, Hideo Kihara, Naoki Hayashi
  • Patent number: 9964895
    Abstract: A toner container includes a container main body, a first conveyance member rotatably provided in the container main body, a first bearing hole rotatably supports a rotation shaft of the first conveyance member in a state where the rotation shaft of the first conveyance member passes through the first bearing hole and extends outside, and a first input joint provided on an end portion of a rotation shaft of the first conveyance member in an attachment portion side, and coupled with a first drive coupling portion of the attachment portion. The first drive coupling portion includes a plurality of engaging pieces. The first input joint includes a plurality of projection pieces configured to be respectively coupled with the plurality of engaging pieces. Among the plurality of projection pieces, at least one first piece is longer than the other second piece(s) in a projection direction of the projection shaft.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: May 8, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masaki Murashima
  • Patent number: 9933726
    Abstract: A developer container includes a container, provided with an opening and configured to accommodate a developer; a sealing member configured to cover the opening; and an unsealing member configured to unseal the opening by moving the sealing member. The sealing member opposes the container at a central opposing portion positioned in a central side and at an end opposing portion positioned at an end side with respect to a longitudinal direction of the unsealing member. The sealing member and the container are bonded to each other at bonding portion which is at least a part of the central opposing portion. The bonding force at the bonding portion of the central opposing portion is larger than a bonding force between the sealing member and the container at the end opposing portion.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 3, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuta Isobe, Kazuhisa Shida, Takayuki Kanazawa, Shunsuke Mizukoshi
  • Patent number: 9897938
    Abstract: A developing device includes a developer bearer to carry, by rotation, developer to a developing range, a casing including a developer container to contain the developer and housing the developer bearer, a gap retainer adjacent to the developer container and downstream from the developing range in a rotation direction of the developer bearer, an opposing wall opposing an end face of the gap retainer in an axial direction of the developer bearer, a first seal disposed between the end face of the gap retainer and the opposing wall, and a contact portion disposed adjacent to an end portion of the gap retainer in the axial direction of the developer bearer. The gap retainer secures a predetermined gap between the developer bearer and the gap retainer. The contact portion contacts, via a second seal, the gap retainer in a direction intersecting the axial direction of the developer bearer.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: February 20, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinnosuke Koshizuka, Koichi Yamazaki, Tatsuya Kubo, Atsushi Nakamoto, Nobuo Takami, Kazunori Suzuki, Naohiro Kawashima
  • Patent number: 9857733
    Abstract: A sealing member for sealing between an accommodating container for accommodating a developer and a member to be assembled to the accommodating container includes a seal forming portion formed of an elastomer resin material or a rubber material and configured to be closely contacted to each of the accommodating container and the member; and a supporting portion for supporting the seal forming portion, wherein the supporting portion is formed of a material harder than the material of the seal forming portion and is configured to be fixed to the accommodating container.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: January 2, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroomi Matsuzaki
  • Patent number: 9829826
    Abstract: A developing device includes a housing that includes an accommodating chamber, a development opening, and a discharge opening, part of developer that is accommodated in the accommodating chamber overflowing into and being discharged from the discharge opening; a developing roller that holds and transports the developer that is supplied from the accommodating chamber; a transporting member that transports the developer in the accommodating chamber so as to supply the developer to the developing roller while stirring the developer; a regulating member that regulates a thickness of a layer of the developer that is held by the developing roller by holding back part of the developer; and a ventilation path portion that is provided so as to extend through the regulating member, the ventilation path portion being connected to a gap space that exists in a range extending to the development opening from where the developing roller passes the regulating member.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: November 28, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masanori Kato, Yoshinori Tanaka, Tomio Ohnuki
  • Patent number: 9817338
    Abstract: A cartridge detachably mountable to a main assembly of an image forming apparatus includes a cartridge frame formed of a resin material; a plurality of resin members molded on the cartridge frame by injection molding of a resin material different from that of the cartridge frame; a plurality of contact surfaces, provided on the cartridge frame, to which metal molds corresponding to the resin members are to be contacted from the same side when the resin members are molded; and a plurality of resin material inlet ports, provided in an opposite side of said cartridge frame from a side where the contact surfaces are provided. The resin material has been flowed into the cartridge frame when the resin members are molded.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: November 14, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuharu Hoshi, Akira Suzuki, Hiroshi Takarada, Toshiteru Yamasaki
  • Patent number: 9804531
    Abstract: A developing device includes a device housing, a developer holding member, and a supply member. The device housing contains developer. The developer holding member includes a magnetic field generating device and holds the developer. The supply member is rotated so as to lift the developer from below on a developer lifting side in a rotational direction thereof toward the developer holding member. The developing device has an exhaust passage that is provided along an outer circumference of the developer holding member and that allows air in the apparatus body to be exhausted therethrough. An opposite portion is defined on an opposite side to the developer lifting side in the rotational direction of the supply member. The developing device also includes a blocking member that intersects a tangent connecting the opposite portion to the inlet so as to block entrance of the developer into the exhaust passage.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: October 31, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinichiro Fujimori, Takayuki Yamada, Taiyou Uehara
  • Patent number: 9709927
    Abstract: A developer unit according to one example embodiment includes a housing having a reservoir for storing a developer mix that includes toner and magnetic carrier beads. A magnetic roll is mounted on the housing. An outer surface of a sleeve of the magnetic roll is positioned to carry the developer mix from the reservoir through a front portion of the magnetic roll that is exposed from the reservoir to permit transfer of toner from the outer surface of the sleeve to a photoconductive drum and back to the reservoir as the sleeve rotates in an operative rotational direction. An air vent is positioned along a rear portion of the magnetic roll for exiting air in the reservoir from the housing. An entire opening of the air vent is positioned vertically higher than the rotational axis of the sleeve when the developer unit is in an operative orientation.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: July 18, 2017
    Assignee: Lexmark International, Inc.
    Inventors: Michael Brian Bacelieri, Robert Dan Bennett, III, Jenny Marie Berens, Mark Leo Doerre, Courtney Harrison Soale
  • Patent number: 9690233
    Abstract: A developing device includes a casing having an opening, the casing to contain developer, and a developer bearer including a magnetized range to cause developer to stand on end on a surface of the developer bearer and an end range outside the magnetized range in a longitudinal direction of the developer bearer. The developer bearer is disposed in the casing and partly exposed from the opening with a casing gap secured between the surface of the developer bearer and an inner face of the casing. The developer bearer generates, by rotation, sucked-in airflow to collect a floating toner from the opening into the casing, and the casing gap is smaller in the end range than the magnetized range.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: June 27, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Hamada, Jun Shiori, Hideo Yoshizawa, Shingo Kuboki, Takahiro Adachi