Patents Examined by Joseph S. Wong
  • Patent number: 11073787
    Abstract: A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: July 27, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu
  • Patent number: 11073773
    Abstract: According to one embodiment, the image forming apparatus includes a developing device and a control unit. The developing device includes a rotator for rotating to cause a developer contained in a container to flow, and performs development using the developer. The control unit has a first control for rotating the rotator in a first direction during development. The control unit has a second control that rotates the rotator in a second direction opposite to the first direction at a predetermined timing when development is not performed. When the second control is performed a plurality of times during a predetermined period, the control unit gradually reduces an interval at which the second control is performed.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: July 27, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Mitsutoshi Watanabe, Hirotaka Fukuyama
  • Patent number: 11067930
    Abstract: An image forming apparatus includes an image forming unit configured to form an image on a sheet; a second reading sensor, and a controller. The first reading sensor is provided on a conveyance path, and is configured to read a first surface of the sheet conveyed along the conveyance path. The second reading sensor is provided at a position different from a position of the first reading sensor, and is configured to read a second surface which is on a side opposite to the first surface of the sheet conveyed along the conveyance path. The controller is configured to control the image forming unit to form measurement images for measurement of printing positions on the sheet, control the first reading sensor to read end portions of the sheet, and to control the second reading sensor to read the end portions of the sheet.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: July 20, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kengo Sato
  • Patent number: 11048202
    Abstract: A sheet conveyance apparatus includes a conveyance portion including a rotary member, and a counter member, a first contact member, a second contact member, and a contacting and separating mechanism. The contacting and separating mechanism causes the second contact member to separate from the surface of a rotary member of a conveyance portion when the rotary member rotates in the first direction, and causes the second contact member to abut against the surface of the rotary member when the rotary member rotates in a second direction opposite to the first direction.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: June 29, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Naoki Hayashi
  • Patent number: 11048188
    Abstract: A developing device includes a rotatable developer carrying member carrying a liquid developer on a carrying surface for developing an electrostatic latent image borne on an image bearing member, and an end portion restricting member, provided in contact with the developer carrying member at an end portion of the developer carrying member with respect its rotational axis direction, for restricting movement of the liquid developer in the rotational axis direction of the developer carrying member. A contact angle of the liquid developer to a side surface of the end portion restricting member on a side where the developer carrying member carries the liquid developer is larger than a contact angle of the liquid developer to the carrying surface of the developer carrying member, and the contact angle of the liquid developer to the side surface of the end portion restricting member is 45° or more.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: June 29, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryota Fujioka, Teppei Nagata, Takehiro Kojima, Shota Takami
  • Patent number: 11048197
    Abstract: An image forming apparatus includes a developer container, an agitator, a toner supply, a toner sensor, and a controller. The developer container contains a two-component developer that includes toner and carrier. The agitator stirs the two-component developer. The toner supply replenishes the developer container with additional toner. The toner sensor detects a toner density of the two-component developer in the developer container. The controller calibrates the toner sensor using the two-component developer. The controller compares a first detection value indicating a toner density at a first time with a second detection value indicating a toner density at a second time after a predetermined time period has elapsed since the first time. The controller issues a notification regarding a suitability of calibration based on a comparison result of the first detection value and the second detection value.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: June 29, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Kei Onishi
  • Patent number: 11048204
    Abstract: A positioning apparatus includes an apparatus body, a draw-out portion, and a positioning mechanism configured to position the draw-out portion at an attachment position with respect to the apparatus body, wherein the positioning mechanism includes a first engaging portion provided in one of the apparatus body and the draw-out portion, a first engaged portion provided in another of the apparatus body and the draw-out portion and configured to determine a position of the draw-out portion in an attachment direction by engaging with the first engaging portion, and wherein the first engaged portion includes an inclined surface that is inclined downward toward a downstream side in the attachment direction and causes a force in the attachment direction to act on the draw-out portion on a basis of a weight of the draw-out portion in a state in which the first engaged portion is engaged with the first engaging portion.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: June 29, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Fumiya Sawashima, Takeo Kawanami, Shunsuke Hijikata, Kohei Koguchi, Yoichiro Iizuka
  • Patent number: 11029632
    Abstract: A fixing apparatus includes a thermal conductive member that is in contact with a heater and has a thermal conductivity higher than the thermal conductivity of a base material of the heater, and a thermal-resistant member that is disposed between the thermal conductive member and a support member configured to support the heater, a thermal resistance in a thickness direction of the thermal-resistant member being higher than the thermal resistance in the thickness direction of the thermal conductive member.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: June 8, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Kinukawa, Masashi Tanaka, Sho Taguchi, Naofumi Murata
  • Patent number: 11009824
    Abstract: A fixing device (7) includes a fixing member (21), a pressing member (22), a rotation detector (41), and an auxiliary driving part (42). The fixing member (21), with rotating around an axis, heats a toner image on a medium (S). The pressing member (22), with rotating around an axis, forms a pressing area (N) with the fixing member (21) and presses toner on the medium (S) passing through the pressing area (N). The rotation detector (41), when the medium (S) stops while being sandwiched between the fixing member (21) and the pressing member (22), detects rotation of the fixing member (21) or the pressing member (22) generated in a process of extracting the medium (S) toward an upstream side or a downstream side in a passing direction.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 18, 2021
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Mashio Takezawa
  • Patent number: 11009823
    Abstract: An image forming apparatus employing an electrophotographic image forming unit and an inkjet image forming unit, thereby being capable of printing an image on each of a front surface and the back surface of a recording medium.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: May 18, 2021
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Youngsu Lee, Heungsup Park, Yuntae Kim, Eogkyu Kim
  • Patent number: 10996599
    Abstract: Certain embodiments provide a fixing device, for fixing a toner image formed on an image receiving medium to the image receiving medium, including: a pressure rotation member; a pressure member against which the pressure rotation member is pressed across the image receiving medium; a heating roller separated from the pressure member and configured to rotate around a rotation axis thereof; an annular belt wound around the heating roller and the pressure member; a belt regulating member configured to include an opening into which the heating roller is loosely fitted and an abutting surface abutting against the annular belt; and a stopper arranged to face an outer edge of the annular belt contacting the heating roller across the belt regulating member.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: May 4, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Satoshi Himeno
  • Patent number: 10990031
    Abstract: A developing device includes an agitating member, a magnetic roller, a lower housing, an upper housing and a blade member. The lower housing includes a first housing part including a first edge having a first contact face and a first facing surface at a blade member's side. The upper housing includes a second housing part including a second edge having a second contact face contact with the first contact face and a second facing surface facing to the first facing surface. The blade member is attached to the upper housing and arranged at a gap to the lower housing. Between the first and second facing surfaces, a width at a blade member's side is broader than a width at a first contact face's side. The first and second facing surfaces are bonded by an adhesive agent. The gap is sealed by the adhesive agent.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: April 27, 2021
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hiroaki Takai
  • Patent number: 10990034
    Abstract: A powder storage height detection device includes: a main body that includes a transport path along which powder is transported; a powder transport unit that is disposed to rotate in the transport path and includes a transporter provided spirally around a rotational shaft; a swinging unit that comes into contact with a surface of the powder transported in the transport path, and swings by following at least a storage height of the surface; a detection unit that detects a state of swinging of the swinging unit; and a determination unit that determines presence or absence of the powder based on a detection signal outputted from the detection unit.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: April 27, 2021
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomoyuki Hamachi, Yoshihisa Nakao, Makoto Kanno, Taiyou Uehara, Daisuke Uchimitsu, Ryo Fukuno
  • Patent number: 10983460
    Abstract: In one aspect an apparatus for use in an electrographic printer is described. The apparatus includes a housing having a base, a first wall, and a second wall, wherein the housing defines a cavity. The apparatus also includes a developer roller and an ink developer electrode for developing ink to the developer roller. The apparatus also includes an ink outlet, and a gutter for directing ink in the cavity towards the ink outlet, the gutter being disposed between the first wall and second wall, and between the developer roller and base. The gutter has a floor, a first side, and a second side, each extending along a length of the gutter. The floor slopes towards the ink outlet to direct ink towards the ink outlet, and the floor and sides of the gutter form a curve transverse to the length of the gutter to direct ink towards the floor.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: April 20, 2021
    Assignee: HP Indigo B.V.
    Inventors: Shachar Berger, Sagie Shanun, Ziv Yosef, Shay Rahamim
  • Patent number: 10976691
    Abstract: A fixing device includes a pressure roller including a rotation shaft, a bearing that rotatably supports the rotation shaft, a first bracket mounted on a first end of the pressure roller in an axial direction thereof, and a second bracket mounted on a second end of the pressure roller in the axial direction thereof. Each of the first bracket and the second bracket includes a rotation shaft support face through which the rotation shaft of the pressure roller is inserted and a bearing support face disposed opposite an outer circumferential surface of the bearing. A first tab is mounted on the bearing support face of the first bracket. A second tab is mounted on the bearing support face of the second bracket. The first tab and the second tab are disposed upstream from the rotation shaft of the pressure roller in a recording medium conveyance direction.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: April 13, 2021
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuusuke Masu
  • Patent number: 10962916
    Abstract: An image forming apparatus includes a fixing device, an image reading unit, and a control unit. The fixing device includes a heating elements arranged in a main scanning direction, a band-shaped thin film which slides on the surface of the heating element while in contact with the heating element, and a rotatable body configured to press against a surface of the thin film to cause the thin film to rotate. The fixing device heats the heating elements when an inspection sheet is passed through the fixing device, the inspection sheet having plural images formed by using a decolorable developer, each of the images having an image density that differs in a sub-scanning direction of the image forming apparatus. The image reading unit reads an image of the heated inspection sheet and the control unit determines an operative state of each heating element based on the read image.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: March 30, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Yayoi Doi
  • Patent number: 10962905
    Abstract: A toner sealing system is described including a seal having first and second alignment features. The seal is selectably installable on one of a first toner container of a first type and a second toner container of a second type. The first alignment feature is matable with a first corresponding alignment feature on the first toner container when the seal is installed on the first toner container for aligning the seal to the first toner container. The second alignment feature is matable with a second corresponding alignment feature on the second toner container when the seal is installed on the second toner container for aligning the seal to the second toner container. Embodiments include those wherein the first alignment feature does not align the seal to the second toner container, and the second alignment feature does not align the seal to the first toner container.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: March 30, 2021
    Assignee: Lexmark International, Inc.
    Inventors: Brian Lester Boettcher, David Lee Merrifield
  • Patent number: 10962899
    Abstract: Downtime relating to formation and detection of a detection image is reduced. An image forming apparatus includes a controller configured to calculate a first conversion unit to convert a gradation of input image data so that density output for the input image data becomes a first density output characteristic based on a first detection result of the detection image detected by a density sensor in a first mode. The controller generates a second conversion unit to convert the gradation of the input image data so that the density output for the input image data becomes a second density output characteristic in a second mode based on the detection result in the first mode and correction information, and further updates the correction information based on a second detection result of the detection image detected by the density sensor in the second mode and the first detection result.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: March 30, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Shimomura, Yoshiki Kudo, Hiroshi Kita, Kazuhiro Funatani, Keita Sato
  • Patent number: 10948872
    Abstract: A process cartridge mountable in and dismountable from an image forming apparatus includes a frame, a storing portion provided on a mounting surface of the frame and configured to store information on the process cartridge, a projection projecting outwardly of the mounting surface in a direction normal to the mounting surface, and an electrical contact portion mounted on the projection and electrically connected to the storing portion.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: March 16, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Ogawa, Tomonori Mori, Daisuke Abe, Noriyuki Komatsu, Hideshi Kawaguchi, Tadayuki Tsuda
  • Patent number: 10948868
    Abstract: A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: March 16, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Maeshima, Masato Tanabe, Keisuke Nomura, Hiroki Shimizu