Auger Patents (Class 399/256)
  • Patent number: 11112730
    Abstract: A developing device includes a developer container, a developer carrier, and a stirring/conveying member. The developer container stores developer containing toner. The developer carrier carries on its surface the toner in the developer container. The stirring/conveying member includes a rotary shaft rotatably supported on the developer container and a stirring blade formed around the outer circumferential face of the rotary shaft and stirs and conveys the developer in the developer container. The stirring/conveying member to be used can be selected from a plurality of types of stirring/conveying members with rotary shafts with different shaft diameters.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: September 7, 2021
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Ryo Yamada, Yuji Kamiyama, Yu Sasaki, Ikuo Makie
  • Patent number: 11054763
    Abstract: Example implementations relate to shafts with blades with tapered surfaces consistent with the disclosure. For example, a device including a shaft, a blade with a plurality of tapered surfaces, the surfaces tapered from a center of the shaft to an outer edge of the shaft, and a membrane attached to the plurality of tapered surfaces to facilitate print substance transport from the center of a print substance container towards the edges of the print substance container.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: July 6, 2021
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L. P.
    Inventors: Kenneth K. Smith, Jeff Luke, Mathew Lavigne, Dean Richtsmeier
  • Patent number: 11036162
    Abstract: A powder transport apparatus includes a housing and first and second transport members. The housing includes first and second transport paths that are separated by a partition wall extending in one direction. The first and second transport paths are connected by first and second connection ports. The first and second connection ports are separated in the one direction with the partition wall interposed therebetween. The first transport member is provided in the first transport path. The first transport member transports powder. The second transport member is provided in the second transport path. The second transport member transports the powder. A transport force of the second transport member at a portion of the second transport member where the second transport member faces the first connection port is smaller than a transport force of the second transport member at a portion where the second transport member faces the partition wall.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: June 15, 2021
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Norihiro Tamazawa, Tomoyuki Yoshii, Yoshitaka Nakajima, Kenta Urayama, Yoshifumi Ozaki
  • Patent number: 10895826
    Abstract: A conveyance screw includes a shaft member, a first blade and a second blade each formed helically on a circumference of the shaft member. The first blade includes a first wide portion and a first narrow portion both located within an area in the axial direction where both of the first blade and the second blade are provided. The first wide portion is protruded radially outward from the shaft member to a first outer diameter. The first narrow portion is formed continuously with the first wide portion in a winding direction of the first blade around the shaft member, and is protruded radially outward from the shaft member to a second outer diameter that is smaller than the first outer diameter.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: January 19, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Osamu Ariizumi
  • Patent number: 10824095
    Abstract: A transporting member includes a rotating shaft and plural helical blades that helically extend around the rotating shaft and that transport a transport object in a direction of the rotating shaft as the rotating shaft rotates, each helical blade including a downstream side surface at a downstream side in a transporting direction and an upstream side surface at a side opposite to the downstream side surface. A portion of at least one of the helical blades has a gap that enables the transport object to move in the direction of the rotating shaft, and the at least one of the helical blades includes an upstream section that extends upstream in a rotating-shaft rotation direction, in which the rotating shaft rotates, from the gap. The upstream section includes a portion in which an inclination angle of the downstream side surface is less than an inclination angle of the upstream side surface.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: November 3, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yoshitaka Nakajima
  • Patent number: 10739701
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier, and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction. The feeding screw includes a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade. The plate-like projection portion is provided to contact an adjacent helical blade on a downstream side with respect to the feeding direction without contacting an adjacent helical blade on an upstream side with respect to the feeding direction.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: August 11, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kouhei Mishima, Dai Kanai
  • Patent number: 10444669
    Abstract: An image forming apparatus includes: a photosensitive drum; a toner cartridge having a toner supply port; and a developing unit including: a developing roller; a developing frame; and a conveyance portion capable of conveying toner contained in the toner cartridge to the developing frame. The conveyance portion including: a coupling tube capable of being coupled to the toner cartridge and having a toner receiving port that faces the toner supply port in a state where the coupling tube is coupled to the toner cartridge; a conveyance tube fixed to the developing frame, the conveyance tube being movable with respect to the coupling tube, in a state where the coupling tube is coupled to the toner cartridge and the toner receiving port faces the toner supply port; and a shutter movable between an open position and a closed position.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: October 15, 2019
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 10444664
    Abstract: A conveying device, which is included in an image forming apparatus, includes a conveying body, a conveyance passage, and an inlet portion. The conveying body has an elastic material and is configured to convey one of toner and developer. The conveyance passage includes the conveying body therein. The one of toner and developer is conveyed to the conveyance passage in a conveying direction as the conveying body rotates. The inlet portion is formed at an upstream side of the conveyance passage and is configured to pass the one of toner and developer therethrough into the conveyance passage. The conveying body has an exposed portion exposed through the inlet portion being exposed inside the conveyance passage. A portion of the exposed portion of the conveying body includes a high rigidity portion having rigidity greater than rigidity of a non high rigidity portion of the conveying body.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: October 15, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventor: Yuki Oshikawa
  • Patent number: 10444668
    Abstract: A developing device is usable with a first image forming apparatus and a second image forming apparatus which include respective image bearing members movable at different rotational speeds during an image forming operation, and includes a rotatable developer bearing member that develops an electrostatic latent image formed on the image bearing member, a developer container that accommodates a developer, and a feeding member to feed the developer in the developing container. In addition, a discharge opening is provided in the developer container and permits discharging of the developer from the developer container, and a covering member is movable relative to the developer container and capable of changing a lower end of the discharge opening between a first level for discharging toner and a second level for discharging toner, depending on which image forming apparatus the developing device is used with, wherein the first and second levels are different from each other.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 15, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomoharu Kitajima, Yushi Sadamitsu
  • Patent number: 10353319
    Abstract: A developing device includes a developer sleeve, a developer container, a partition partitioning the developer container into first and second chambers with first and second ports and first and second feeding members provided in respective chambers. The first feeding member includes a rotation shaft, a first helical portion on an outer periphery of the rotation shaft, a first plate-like radial projection on the rotation shaft at a position opposed to the second port in a downstream side of the first helical portion, and a second plate-like radial projection on the rotation shaft at a position which is opposed to the second port in a downstream side of the first plate-like radial projection and which is spaced from the first plate-like radial projection in a phase. A surface of the first plate-like radial projection and a surface of the second plate-like radial projection are inclined relative to a rotational axis of the rotation shaft.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: July 16, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shunsuke Tsuda
  • Patent number: 10345741
    Abstract: A developing device includes a developing container, first and second stirring-conveyance members, a developer carrier, a toner concentration sensor, a scraper, and a scraper attachment unit. The second stirring-conveyance member includes a rotation shaft, a first spiral blade to convey developer in an axial direction, and a second spiral blade to overlap a region where the first spiral blade is formed, which is opposite to the first spiral blade in phase, and lower than the first spiral blade in height in a radial direction. An absent region, where the second spiral blade does not exist, is formed in one pitch of the first spiral blade, the one pitch facing the toner concentration sensor. The scraper attachment unit is formed to extend, along a straight line passing through intersection points of the first and second spiral blades and parallel to the rotation shaft, into the absent region.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: July 9, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masashi Fujishima, Norio Kubo, Junichi Nakagawa, Asami Sasaki
  • Patent number: 10345738
    Abstract: A stirring/conveying member has a rotary shaft rotatably supported in a powder container, a first helical blade formed on the circumferential surface of the rotary shaft and conveying powder in the axial direction by the rotation of the rotary shaft, and a second helical blade formed on the circumferential surface of the rotary shaft to overlap the forming region of the first helical blade, spiraling in the opposite phase to the first helical blade, and having a smaller radial height than the first helical blade. The first helical blade crosses the second helical blade at least at one place in one turn about the rotary shaft. At least one of the radial heights of the first and second helical blades equals zero at the intersection of the first and second helical blades.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: July 9, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Akifumi Yamaguchi
  • Patent number: 10310438
    Abstract: A drive gear for a generally cylindrical imaging component. The drive gear includes a body for engaging the generally cylindrical imaging component; a cylindrical shaft attached to the body, the cylindrical shaft having an end surface; and lobes extending longitudinally outward from the end surface.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: June 4, 2019
    Assignee: Static Control Components, Inc.
    Inventors: Donald R. Huck, Anthony D. Causey
  • Patent number: 10191411
    Abstract: Provided is a remaining toner conveying apparatus including a cleaning blade which recovers a toner remaining on a surface of a photosensitive drum and a conveying screw which conveys the remaining toner so that a conveyance amount per predetermined time in a first conveyance path conveying the remaining toner recovered by the cleaning blade to a discharge portion for discharging the remaining toner is equal to or less than a conveyance amount in a second conveyance path in a downstream side in a conveyance direction where the conveyance path is narrower than the first conveyance path.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 29, 2019
    Assignee: Canon Finetech Nisca Inc.
    Inventors: Ikuyo Kuroiwa, Yuki Nagahashi, Akihito Yokote, Hideo Nagura
  • Patent number: 10042288
    Abstract: An image forming apparatus, a process cartridge, and a developing unit includes a developer carrying member to carry developer, first and second rotary members arranged in parallel to each other and configured to rotate to agitate and convey the developer, and an enclosure having an inside space to contain the developer, the inside space being divided by a partition with communication openings formed therein at opposite ends thereof into a first chamber configured to maintain the developer above a first level and to hold the first rotary member therein which supplies the developer to the developer carrying member while agitating and conveying the developer, and a second chamber configured to communicate with the first chamber through the communication openings, to maintain the developer at a second level lower than the first level, and to hold the second rotary member therein which circulates the developer with the first chamber through the communication openings.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: August 7, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiroshi Hosokawa, Kenichirou Nagai
  • Patent number: 9983510
    Abstract: A developing device includes a developing container accommodating a developer including toner and magnetic particles, a developer carrying member rotatably provided opposed to an opening of the developing container, a stirring member configured to stir the developer in the developing container to supply the developer to the developer carrying member, a first driving device configured to drive the developer carrying member, and a second driving device configured to drive the stirring member. A controller controls drive of the first driving device and the second driving device so that in a period from output of either earlier one of a stop signal of the first driving device and a stop signal of the second driving device to rotational speeds of both of the developer carrying member and the stirring member becoming not more than ½ of rotational speeds in a steady state during image formation.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: May 29, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Matsumoto, Kyosuke Takahashi
  • Patent number: 9939758
    Abstract: A developing device includes a developer container to contain developer including toner and magnetic carrier, the developer container; a developer bearer to carry, by rotation, the developer to a developing range facing a latent image bearer; a communication opening in a wall defining the developer container; a toner conveyance passage connected to the communication opening; and a cylindrical magnet having a magnetic pole arrangement parallel to an axis of the cylindrical magnet. The cylindrical magnet is disposed to enclose a space overlapping with the communication opening on a cross section perpendicular to the axis of the cylindrical magnet.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: April 10, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Takahiro Adachi, Akira Fujimori, Yutaka Takahashi, Daisuke Hamada
  • Patent number: 9869950
    Abstract: A toner container according to one example embodiment includes a housing having a reservoir for storing toner and a drive shaft positioned in the reservoir. The drive shaft is rotatable about a rotational axis in an operative rotational direction. A toner agitator extends from the drive shaft in the reservoir. The toner agitator is rotatable around the rotational axis of the drive shaft as the drive shaft rotates. The toner agitator folds relative to the drive shaft counter to the operative rotational direction if resistance to rotation of the toner agitator provided by toner in the reservoir exceeds a threshold amount. The toner agitator is biased relative to the drive shaft in the operative rotational direction. A radial length of the toner agitator decreases when the toner agitator folds relative to the drive shaft counter to the operative rotational direction.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: January 16, 2018
    Assignee: Lexmark International, Inc.
    Inventor: Michael Craig Leemhuis
  • Patent number: 9829830
    Abstract: A developing device has a developer container, first and second stirring members, and a developer carrying member. The developer container has a plurality of transport chambers including first and second transport chambers, a communication portion through which the first and second transport chambers mutually communicate in opposite end parts thereof in their longitudinal direction, a developer supply port, and a developer discharge port arranged in a downstream-side end part of the second transport chamber. The second stirring member has a second transport blade, a regulating portion formed on the downstream side of the second transport blade, a discharge blade formed on the downstream side of the regulating portion and discharging developer through the developer discharge port, and a disk formed at a position facing the downstream-side communication portion on the upstream side of the regulating portion and radially protruding over the entire circumference of a rotary shaft.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: November 28, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yu Sasaki
  • Patent number: 9733592
    Abstract: A developing device has a first circulation tank and a second circulation tank. A developer is conveyed from the first circulation tank to the second circulation tank through a first opening, while the developer is partly discharged through an outlet. The developer conveyed to the second circulation tank is conveyed back in the first circulation tank via a second opening. A first screw provided in the first circulation tank has a first vane, which exerts a force in a conveying direction of the first circulation path, in a first portion upstream from the first opening with respect to the conveying direction. The first screw has no vanes in a second portion near the first opening. The first screw has a second vane, which exerts a force in a direction opposite to the conveying direction, in a third portion adjacently downstream from the second portion. The outlet is located at a point of the first circulation tank, downstream from the second vane.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: August 15, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Futoshi Okazaki
  • Patent number: 9720350
    Abstract: An auger assembly according to one example embodiment includes an auger having a helical flight extending along a longitudinal axis. The auger has a central opening running along the longitudinal axis. The auger has an end that includes at least a portion of a turn having substantially zero pitch. A retaining member has a body including a groove on an outer surface of the body. The groove has a shape complementary to the helical flight at the end of the auger. At least a portion of the end of the auger is retained within the groove. A rotatable coupling member extends along the longitudinal axis. At least a portion of the rotatable coupling member is positioned within the central opening of the auger and presses the outer surface of the retaining member against an inner diameter of the end of the auger.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: August 1, 2017
    Assignee: Lexmark International, Inc.
    Inventor: Glen Alan Reidhaar
  • Patent number: 9678469
    Abstract: A collected toner container includes a container with a collecting port receiving a collected toner on one end in a longitudinal direction and a conveying member convey the toner collected from the collecting port from the one end toward the other end. The conveying member includes a plurality of forward conveyance sections and a plurality of reverse conveyance sections configured to convey the toner in a direction opposite to the forward conveyance section. The reverse conveyance sections are arranged alternately with the forward conveyance sections in an axial direction and a length of a downstreammost reverse conveyance section, in the direction of conveyance of the forward conveyance sections, is formed to be longest among the plurality of reverse conveyance sections.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: June 13, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshihide Shima
  • Patent number: 9658572
    Abstract: A developing device includes a developer container, a first stirring member, a second stirring member, and a developer carrying member. The second stirring member includes a second transport blade for transporting developer inside a second transport chamber; a regulating portion having a first regulating blade formed next to, downstream of, the second transport blade in the transport direction of the developer inside the second transport chamber, for transporting developer in the same direction as the second transport blade with a smaller transporting force than the second transport blade, and a second regulating blade formed next to, downstream of, the first regulating blade for transporting developer in the opposite direction to the first regulating blade, and a discharge blade formed next to, downstream of, the second regulating blade for transporting developer in the same direction as the second transport blade to discharge the developer through the developer discharge port.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: May 23, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Koji Suenami, Yu Sasaki
  • Patent number: 9639035
    Abstract: A fixing device includes a heat unit, a pressure roller configured to nip a conveyed sheet in cooperation with the heat unit, the pressure roller having a shaft defining an axial direction, a bearing configured to support the shaft, a frame configured to support the bearing and made from resin, and a heatsink made from metal, and in surface contact with the frame and at least one of the shaft and the bearing.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: May 2, 2017
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Tomoaki Hazeyama
  • Patent number: 9599932
    Abstract: An accommodating container includes: an accommodating chamber, provided with an opening, for accommodating a developer; a seal member for unsealably sealing the opening; and a rotatable member rotatably supported inside the accommodating chamber. The seal member includes a sealing portion for sealing the opening, a connecting portion connected with the rotatable member, and at least one hole provided between the sealing portion and the connecting portion. The rotatable member includes a shaft portion and at least one projection extending in a direction of being spaced from the shaft portion. The hole and the projection are provided to establish a non-overlapping positional relationship with respect to a direction along the shaft portion.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: March 21, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Takeuchi, Yoshiyuki Batori, Ryuta Murakami, Daisuke Makiguchi, Gosuke Goto, Makoto Tokudome, Yu Fukasawa
  • Patent number: 9568858
    Abstract: A developing unit includes a chamber in which a developer material is held. The developer material is received from an external device through the developer material receiving opening. A developer guide member is disposed in the chamber and directly under the developer material receiving opening. The developer guide member extends in a first direction and guides the developer material in the first direction. A developer material transporting member is disposed between the developer material receiving opening and the developer guide member. The developer material transporting member extends in a second direction parallel to the first direction and transports the developer material in the second direction. An agitator is formed on the developer transporting member and is disposed directly under the developer material receiving opening.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: February 14, 2017
    Assignee: Oki Data Corporation
    Inventor: Yukiyoshi Oda
  • Patent number: 9519242
    Abstract: A developing apparatus includes a developer bearing member, a first conveying member disposed in a supplying chamber, a second conveying member disposed in a collecting chamber, and a third conveying member disposed in the collecting chamber to convey the developer in a conveying direction opposite to the conveying direction of the second conveying member. The third conveying member has a conveying performance which is lower than that of the second conveying member, and has a first screw portion including a spiral blade portion and a second screw portion including a spiral blade portion at a downstream side in the conveying direction The spiral blade portion of the first screw portion and the spiral blade portion of the second screw portion are formed to have a same spiral direction, and a conveying performance of the second screw portion is lower than a conveying performance of the first screw portion.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: December 13, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Mitsuhiro Furukawa
  • Patent number: 9494892
    Abstract: A developing apparatus includes a developer vessel that is provided with a first transporting path, a second transporting path and a third transporting path. The first transporting path and the second transporting path are communicated with each other, and a developer is circulated in the first transporting path and the second transporting path. The third transporting path has a developer discharge port and is provided in an upstream side in a transporting direction of the developer in the second transporting path. Furthermore, an annular plate-like first regulation portion is arranged in an end portion of the second transporting path in a third transporting path side and an annular plate-like second regulation portion opposite to the first regulation portion with a predetermined interval is arranged in an end portion of the third transporting path in a second transporting path side.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: November 15, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shuichi Akedo
  • Patent number: 9405226
    Abstract: An image forming apparatus, a process cartridge, and a developing unit includes a developer carrying member to carry developer, first and second rotary members arranged in parallel to each other and configured to rotate to agitate and convey the developer, and an enclosure having an inside space to contain the developer, the inside space being divided by a partition with communication openings formed therein at opposite ends thereof into a first chamber configured to maintain the developer above a first level and to hold the first rotary member therein which supplies the developer to the developer carrying member while agitating and conveying the developer, and a second chamber configured to communicate with the first chamber through the communication openings, to maintain the developer at a second level lower than the first level, and to hold the second rotary member therein which circulates the developer with the first chamber through the communication openings.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: August 2, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiroshi Hosokawa, Kenichirou Nagai
  • Patent number: 9405230
    Abstract: A developing apparatus includes a developer vessel that is provided with a first transporting path, a second transporting path and a third transporting path. The first transporting path and the second transporting path are communicated with each other, and a developer is circulated in the first transporting path and the second transporting path. The third transporting path is provided in an upstream side in a transporting direction of the developer in the second transporting path. If a toner is consumed while forming an image on a paper, a toner corresponding to a consumption amount is resupplied together with a carrier from a toner cartridge to the developer vessel. A carrier and/or a developer that overflows from the second transporting path to the third transporting path is discharged from a discharge port.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: August 2, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shuichi Akedo
  • Patent number: 9383682
    Abstract: A developing device includes a first transport path and a second transport path. In the first transport path, a developer containing toner and a magnetic material is transported in the axial direction of a first transport member that opposes a developer holding element by rotation of the first transport member. The second transport path includes plural flow paths that extend along the axial direction, and plural second transport members provided in the plural flow paths to transport the developer. The plural flow paths each have a length in the axial direction that is shorter than the length of the first transport path in the axial direction. Respective end portions of the first and second transport path are connected such that the developer which has flowed into the second transport path from one end of the first transport path flows into the other end of the first transport path.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: July 5, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoshifumi Ozaki, Chihiro Hagiwara, Shinji Mitsui, Takuya Iwamura, Satoshi Tanaka
  • Patent number: 9366992
    Abstract: A developer container may include a container body accommodating developer, a conveyance member, and a rotation member having a rotary shaft and an elastic part supported by the rotation member and configured to convey the developer. The container body may include a first support part to which the rotary shaft is loosely fitted, and a second support part that supports the rotary shaft. The container body may further include a sliding contact part that the elastic part sliding-contacts while being elastically deformed when the conveyance member is being rotated. In some examples, a distance from a center of the rotary shaft to a leading end of the elastic part gradually increases from the one end portion-side of the rotary shaft towards the other end portion-side of the rotary shaft.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: June 14, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Junichi Hashimoto, Shuichi Kato
  • Patent number: 9354544
    Abstract: A developing device includes: a developing frame having an opening; a developing roller that is arranged to the opening and is configured to carry developer; a supply roller configured to supply the developer to the developing roller, and a layer thickness regulation member configured to regulate a layer thickness of the developer carried on the developing roller. The developing frame includes: a developer accommodation chamber configured to accommodate the developer; a developer supply chamber configured to supply the developer, which is supplied from the developer accommodation chamber, to the supply roller; a developer return chamber that is arranged above the developer supply chamber and is configured to return the developer, which is scraped off by the layer thickness regulation member, to the developer accommodation chamber. The developer return chamber is provided with a developer returning unit configured to convey the developer to the developer accommodation chamber.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: May 31, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 9329523
    Abstract: A developing apparatus includes a developer carrying member configured to carry a developer including a toner and a carrier, a supply chamber provided opposite to a peripheral surface of the developer carrying member, and a collection chamber provided opposite to the peripheral surface of the developer carrying member. In addition, a first conveyance member is provided in the supply chamber, a second conveyance member is provided in the collection chamber, and a third conveyance member is provided opposite to the second conveyance member. The third conveyance member and the second conveyance member are directly opposed to each other in a predetermined position which overlaps with a developer carrying area of the developer carrying member, and the third conveyance member conveys a part of the developer conveyed by the second conveyance member in the predetermined position in the direction opposite to the second conveyance member.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: May 3, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Tomoyuki Sakamaki
  • Patent number: 9291945
    Abstract: A developing unit includes a developer carrier configured to hold a developer including a toner and a carrier on a developer carrying area, a first chamber configured to collect the developer from the developer carrier, and a second chamber configured to communicate with the first chamber and to circulate the developer between the first chamber and the second chamber. A first conveying member in the first chamber conveys the developer from a first communication portion toward a second communication portion, and a second conveying member in the second chamber conveys the developer from the second communication portion toward the first communication portion. The first communication portion is configured to be provided outside of the developer carrying area, and the second communication portion is configured to be provided in a position overlapping an edge of the developer carrying area.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: March 22, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Fumiyoshi Saito
  • Patent number: 9291944
    Abstract: A developing device includes a housing, a stirring member, a developing unit body, a driving device, a detecting device, and a control device. The housing accommodates developer supplied from a supply means and including toner and carrier. The stirring member rotates in the housing to stir the developer. The developing unit body rotates in the housing to convey the developer toward an image carrying member from the stirring member and attaches the toner to the image carrying member. The driving device rotationally drive at least one of the stirring member and the developing unit body. The detecting device detects the torque of the driving device. The control device performs a recovery process of controlling the supply means to supply at least one of the carrier and the developer to an interior of the housing when a detection result of the detecting device has a value lower than a threshold value.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: March 22, 2016
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Tamotsu Shimizu, Akira Matayoshi
  • Patent number: 9285711
    Abstract: A developing device includes a developer container including a first chamber and a second chamber arranged along a lateral direction, which crosses a gravitational direction, developer circulating through the first chamber and the second chamber; a transporting member rotatably disposed in the first chamber; and a supply member rotatably disposed in the second chamber. A lower end position of the supply member and a lower end position of the transporting member in the gravitational direction are at the same level. While the supply member and the transporting member are rotating, an upper surface of developer contained in the first chamber and an upper surface of developer contained in the second chamber are at levels not higher than an upper end position of the transporting member but not lower than an upper end position of the supply member in the gravitational direction.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: March 15, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuyuki Tsutsumi, Yoshinobu Kariya
  • Patent number: 9176429
    Abstract: A developing device includes a housing, a developing roller, a developer supply path, a developer conveyance path, a supply-side conveying member, an agitating side conveying member and first projection members. The developing roller is rotatably supported in the housing. The supply-side conveying member includes a supply-side spiral member formed by connecting spiral pieces, in the first direction and having a hollow interior formed by the connected spiral pieces and a first rib member extending in the first direction, is arranged in the developer supply path and conveys the developer in the first direction by being driven and rotated. The first projecting members extend in the first direction along an outer wall portion of the first rib member from a first area where the supply-side spiral member and the first rib member intersect and project radially outward in the rotation of the supply-side conveying member.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: November 3, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoshihiro Yamagishi, Hiroshi Yamazaki, Masaki Hayashi, Eiji Nimura, Koji Kuramashi
  • Patent number: 9158233
    Abstract: A conveyance device includes a housing, a formation member, and a detection section. The housing has a first conveyance path, a second conveyance path, and a first communication path. The first and second conveyance paths each are a conveyance path for conveying a developer. The first communication path allows a first end portion of the first conveyance path and a first end portion of the second conveyance path to be in communication with each other via a communication surface. The communication surface has a first region and a second region. The formation member forms the second region of the communication surface so that a height of the second region from a bottom portion of the first communication path is lower than a height of the first region from the bottom portion of the first communication path. The detection section detects the amount of the developer.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: October 13, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Hiroshi Yamazaki, Eiji Nimura, Kuniaki Nakano, Koji Kuramashi, Yoshihiro Yamagishi
  • Patent number: 9128454
    Abstract: A gear mounting portion of a rotating shaft includes a shaft portion, with a D-shaped cross-section, engaged with a connecting portion of a gear having a D-shaped cross-section; the connection portion provided with a first hole portion; one flexible portion provided along the axial direction; and a retaining portion provided at a tip of the flexible portion. The retaining portion protrudes outwards with respect to the shaft portion, and the shaft portion is engaged with the connecting portion after the retaining portion has passed through a second hole portion of a hollow shaft. The flexible portion remains bent while the retaining portion passes through the second hole portion of the hollow shaft. Once the shaft portion engages with the first hole portion of the connecting portion, the flexible portion ceases to bend and engages with the gear. As a result, without damaging the rotating shaft, the gear is reliably prevented from coming free from the rotating shaft.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: September 8, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventor: Hideaki Ikeda
  • Patent number: 9075342
    Abstract: A developer conveying device includes a housing with a pair of wall portions, a developer conveyance path extending between the pair of wall portions, and a conveying member. The conveying member is rotatably supported on the wall portions and conveys developer from one wall portion to the other. This conveying member includes a spiral member, shaft portions and a breaking member. The spiral member is formed by connecting spiral pieces, each forming one spiral turn, in a conveying direction of the developer and includes a hollow interior defined by the connected spiral pieces. The shaft portions are arranged at opposite end parts of the spiral member and rotatably supported on the wall portions and serve as a rotary shaft for the rotation of the conveying member. The breaking member extends across the hollow interior in a direction intersecting with the conveying direction.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: July 7, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Koji Kuramashi
  • Patent number: 9031472
    Abstract: A developing device includes a housing containing a developer, a developer carrier, a developer conveying path, a developer conveying member, and a plurality of paddle members. The developer conveying path includes a first conveying path and a second conveying path. The developer conveying member is disposed in the second conveying path and includes a rotating shaft and spiral blades formed around the rotating shaft. The developer conveying member is rotationally driven to convey the developer in the second direction and feeds the developer to the developer carrier. The plurality of paddle members project in a radial direction from the rotating shaft of the developer conveying member at one circumferential position on the rotating shaft. The plurality of paddle members is contiguously arranged in the axial direction of the rotating shaft to connect the spiral blades adjacent to each other in the axial direction.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 12, 2015
    Assignee: Kyocera Document Solutions Inc.
    Inventors: Takefumi Yotsutsuji, Akifumi Yamaguchi, Takahisa Nakaue, Tamotsu Shimizu, Minoru Wada, Shizuka Okada
  • Patent number: 9031434
    Abstract: An image forming apparatus includes an image bearing member, a developer carrying member, a first chamber for permitting feeding of the developer to the developer carrying member, and a second chamber for forming a circulation path of the developer at end portions thereof. The second chamber collects the developer from the developer carrying member at an opposing position, and a screw member feeds the developer contained in the first and second chambers. In addition, a supplying portion supplies a developer, a discharging portion, provided in the circulation path, causes an excessive developer to overflow, and a controller controls, on the basis of information on a first drive time from a start of rotation of the screw member to an end of a developing operation, a second drive time from the end of the developing operation to a stop of the rotation of the screw member.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshiro Tsukada
  • Patent number: 9026008
    Abstract: A developing device includes a developing chamber which supplies a developer to a developer bearing member, an agitating chamber connected at both ends to the developing chamber and disposed above the developing chamber, a first developer conveying member disposed within the developing chamber, and a second developer conveying member disposed within the agitating chamber. In addition, a third developer conveying member is disposed on a same axis as the first developer conveying member and able to convey the developer toward the developing chamber at a downstream side from a first connecting portion in a conveying direction of the first developer conveying member, and a supplying portion supplies developer to the third developer conveying member and is disposed at a position facing the third developer conveying member.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takanori Iida
  • Patent number: 9008553
    Abstract: A developer conveying device includes a housing, a developer conveyance path and a conveying member. The developer conveyance path extends between the pair of wall portions of the housing. The conveying member conveys developer from one wall portion toward the other. The conveying member includes a spiral member, shaft portions, a rib member, a supporting member and a projecting portion. The spiral member is formed by connecting spiral pieces in a conveying direction of the developer and includes a hollow interior formed by the connected spiral pieces. The rib member extends in the conveying direction and bridges adjacent ones of the spiral pieces of the spiral member. The supporting member connects an end part of the rib member in the conveying direction and the shaft portion. The projecting portion projects from the end part of the rib member more toward the wall portion than the supporting member.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: April 14, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Kuniaki Nakano, Eiji Nimura, Koji Kuramashi, Hiroshi Yamazaki, Yoshihiro Yamagishi
  • Patent number: 8995883
    Abstract: A developing device includes a developing container, a first agitating/conveying member, a second agitating/conveying member, a developer supply member, a supply port, and a supply section. The developing container is separated into a developer supply passage, a first conveying chamber, and a second conveying chamber, which are arranged substantially parallel to one another. The supply section is disposed between the developer supply passage and the first conveying chamber, and through the supply section, the developer is supplied from the developer supply passage into the first conveying chamber.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: March 31, 2015
    Assignee: Kyocera Document Solutions Inc.
    Inventors: Koji Kuramashi, Tatsuya Yamanaka, Hirokazu Fujii
  • Patent number: 8989632
    Abstract: A removable unit for an electrophotographic image forming device according to one example embodiment includes a housing having an inner volume forming a toner reservoir and a channel for accumulating toner. An auger advances toner within the channel and has a rotational axis and a flight. An agitator is mounted on an inner surface of the housing and is positioned to extend toward the auger. The agitator has a first segment and a second distal segment connected to the first segment. When the auger rotates, the flight of the auger engages the agitator causing movement of the second distal segment to push toner accumulated in the channel into the auger.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: March 24, 2015
    Assignee: Lexmark International, Inc.
    Inventors: James Richard Leemhuis, Gregory Alan Cavill
  • Patent number: 8989635
    Abstract: An intermediate hopper has a toner reception tub; a partition for dividing an internal space of the toner reception tub; a first and a second toner conveyance path separated by the partition; a first toner conveyance screw being provided in the first toner conveyance path; a second toner conveyance screw being provided in the second toner conveyance path; a toner receiving port for receiving the toner; a toner communicating path for guiding the toner in the first toner conveyance path to the second toner conveyance path; and a toner discharge port for discharging the toner out of the toner reception tub, wherein the partition comprises a plurality of intermediate slits for guiding the toner contained in the first toner conveyance path to the second toner conveyance path.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: March 24, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Satoshi Kimura
  • Patent number: 8977168
    Abstract: A developer unit for an image forming apparatus is provided. The image forming apparatus includes a developer device having a developer agent carrier and a developer agent supplier, a developer agent container arranged in an upper position with respect to the developer device, and a curved wall, which separates the developer device from the developer agent container; is curved toward the developer agent container; and is formed to have a feeding opening and a collecting opening, and a conveyer, which is arranged along the developer agent supplier and conveys the developer agent toward the collecting opening. The curved wall is arranged to be in proximity to the conveyer and to fit with outlines of the conveyer.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: March 10, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 8971771
    Abstract: An intermediate hopper has a toner reception tub, a partition for dividing an internal space of the toner reception tub; a first and a second toner conveyance path; a first toner conveyance screw being provided in the first toner conveyance path; a second toner conveyance screw being provided in the second toner conveyance path; a toner receiving port for receiving the toner; a toner communicating path for guiding the toner in the first toner conveyance path to the second toner conveyance path; a toner discharge port; and a toner amount detection sensor, wherein the first toner conveyance screw further comprises an agitation plate disposed at a position facing the toner receiving port so as to extend radially from the first rotation axis and fixed in parallel with the first rotation axis, and the toner amount detection sensor is provided on an upstream side relative to the agitation plate.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: March 3, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shuichi Akedo