Forced Air Circulation Patents (Class 399/92)
  • Patent number: 11143986
    Abstract: According to one embodiment, the developing device includes a developing case containing toner, a mixer configured to diffuse the toner in the developing case, and a developing roller configured to develop a latent image formed on an image carrier. The developing case includes a circulation path through which air containing the toner flows. The developing roller is partially exposed from the developing case. The developing roller includes a sleeve rotating along with the movement of the image carrier and a plurality of magnetic pole portions disposed inside the sleeve. The developing roller holds the toner on the sleeve and supplies the toner to the image carrier to develop the latent image. The developing device further includes a magnet disposed apart from the developing roller. The magnet faces one of the magnetic pole portions across the sleeve.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: October 12, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Nobuaki Takahashi
  • Patent number: 11143991
    Abstract: An image forming apparatus includes a cooler and a heater, which includes a heat generation part including resistive heat generators, a first electrode, a second electrode, a first conductor, a second conductor, and a branch channel. The first conductor connects the resistive heat generators and the first electrode. The second conductor extends from the resistive heat generators to a side in a first longitudinal direction of the heater to be connected to the second electrode. The branch channel branches from the second conductor and extends to a side in a second longitudinal direction opposite the first longitudinal direction to be connected to either the second conductor or the second electrode without passing through the first conductor. A cooling ability of the cooler to an end side of the heater in the second longitudinal direction is greater than that to an end side of the heater in the first longitudinal direction.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: October 12, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventor: Yuusuke Furuichi
  • Patent number: 11092928
    Abstract: An image forming apparatus includes a first frame member, a second frame member opposing the first frame member, a cartridge, a cartridge holding member, an air blowing portion, a first opening, a second opening opposing the first opening, an air discharge passage member, and an outer casing member provided so as to cover an outside of the second frame member and permitting discharge of the air to an outside of the image forming apparatus through the air discharge passage member.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: August 17, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichiro Okawa, Yu Shuhama
  • Patent number: 11092912
    Abstract: An image forming apparatus includes a photosensitive member, an intermediary transfer member, a transfer portion, a cleaning portion, and an air blowing portion. The air blowing portion blows the air toward an outer peripheral surface of the intermediary transfer member in a moving direction of the intermediary transfer member away from the transfer portion, at a position between the transfer portion and the cleaning portion with respect to a movement direction of the intermediary transfer member.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: August 17, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiko Aono, Seiji Inada, Kazushi Suzuki, Atsushi Kimura
  • Patent number: 11054789
    Abstract: An image forming apparatus includes an apparatus body and an exhaust unit. The exhaust unit includes a first duct and a separating member. The first duct includes a first duct A forming member and a first duct B forming member provided with a plurality of communication ports which form one side surface of a second sheet transport path through which a sheet after heating and fixing is transported, a first exhaust fan for discharging air of the first duct to an outside of the apparatus body, and a filter disposed on a downstream side from the second sheet transport path. The first duct separates the second sheet transport path from spaces other than the first duct in the apparatus body. Further, the separating member separates the second sheet transport path from spaces other than the first duct in the image forming apparatus.
    Type: Grant
    Filed: December 22, 2018
    Date of Patent: July 6, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masafumi Sakamoto, Hideaki Kadowaki
  • Patent number: 11042113
    Abstract: An image forming apparatus includes a fixing portion, a first guiding portion, a second guiding portion, a first rotatable member pair provided between the first and second guiding portions, an air discharging portion for discharging air from a feeding passage of the first guiding portion to an outside of a main assembly of the image forming apparatus, and a second rotatable member pair provided downstream of the second guiding portion.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: June 22, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuki Akamatsu
  • Patent number: 10990061
    Abstract: An image forming apparatus includes an image forming portion to form, at a first position, a toner image on a recording material using toner having a parting material, a fixing portion to fix, at a second position, an unfixed toner image formed on the recording material by the image forming portion, and a heat exhausting duct having an inlet between the first and second positions with respect to a recording material feeding direction to discharge air heated by the fixing portion, with the heat exhausting duct being free of a filter at the inlet thereof. In addition, a collection duct has an inlet between the first position and the second position to collect particles resulting from the parting material. The collection duct is provided with a filter at the inlet thereof, and the inlet of the collection duct is integrally molded with the inlet of the heat exhausting duct.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: April 27, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ryoichi Kawasumi
  • Patent number: 10942488
    Abstract: An image forming apparatus includes an image forming unit that forms an image when a working state of the image forming unit is an image forming state and does not form an image when the working state is a non-image forming state, an air blowing part that blows air toward the image forming unit, an air flow rate changing part that changes a flow rate of the air blown toward the image forming unit from the air blowing part, and a switching part that performs a switching to switch the working state of the image forming unit between the image forming state and a non-image forming state, wherein the air flow rate changing part changes the air flow rate of the air blowing part in mechanical correspondence with the switching between the image forming state and the non-image forming state of the image forming unit by the switching part.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: March 9, 2021
    Assignee: Oki Data Corporation
    Inventors: Keita Takahashi, Takashi Saito
  • Patent number: 10935929
    Abstract: An image forming apparatus includes an image forming device; a fixing device; a first conveyance passage downstream from the fixing device in a sheet conveyance direction; a second conveyance passage downstream from the fixing device and communicating with the first conveyance passage; a sheet reversing member to reverse a conveyance direction of the sheet to the second conveyance passage; a divider to switch a route of the sheet between the first conveyance passage and the second conveyance passage; and a sheet detection sensor disposed downstream from the fixing device and upstream from the divider. The first conveyance passage includes a sheet outlet from which the sheet is ejected outside the apparatus. The apparatus further includes a ventilation passage communicating with an outside, to guide air from the outside to pass the sheet detection sensor and enter at least one of the first conveyance passage and the second conveyance passage.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: March 2, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoya Tanaka, Shoji Asanuma, Taiga Shoen, Yoshihide Ohta, Akimitsu Obana, Makoto Kikura
  • Patent number: 10908540
    Abstract: A fixing device fixes a toner image to a medium conveyed in a conveying direction, the toner image formed on the medium, the fixing device including a heating rotating body, a heater, a pressing member, a pressing rotating body, and a lubricant holding member. The heater heats the heating rotating body, which is supported to be rotatable. The pressing member is disposed inside the heating rotating body. The pressing rotating body is pressed against the pressing member through the heating rotating body to form a nip through which the medium passes. The lubricant holding member has an abutting surface that abuts against an inner circumferential surface of the heating rotating body, and the abutting surface includes a first region filled with a first lubricant and a second region filled with a second lubricant.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: February 2, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Takaho Watanabe
  • Patent number: 10877400
    Abstract: A developing device includes a development roller, a housing, a suction device, and a discharging device. The development roller rotates to pass a developer to an image carrier. The housing includes an opening, which allows the development roller to face the image carrier therethrough, and a flow-in path, which is a gap formed to allow air to flow therethrough between the development roller and an edge of the opening downstream in a rotation direction of the development roller. The suction device has a suction path having a distal end serving as a suction port that is open to an outside of the housing, and sucks air through the suction port. The discharging device includes a through-hole, which extends through the housing to connect an inside to an outside of the housing, and a discharge path, which extends from the through-hole to the suction port. The discharge path merges with the suction path.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: December 29, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinichi Kuramoto, Yoshifumi Ozaki, Yoshitaka Nakajima, Norihiro Tamazawa, Tomoyuki Yoshii
  • Patent number: 10877401
    Abstract: A feeding screw for feeding a developer includes a rotation shaft, a first blade portion helically formed on an outer peripheral surface of the rotation shaft to feed the developer in one direction, a second blade portion helically formed on the outer peripheral surface to feed the developer in the one direction, and a third blade portion helically formed on the outer peripheral surface to feed the developer in the one direction. The first blade portion and the second blade portion overlap with each other with respect to a rotational axis direction of the feeding screw, the second blade portion and the third blade portion do not overlap with each other with respect to the rotational axis direction, and the third blade portion and the first blade portion overlap with each other with respect to the rotational axis direction.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: December 29, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Osamu Ariizumi, Shunsuke Tsuda
  • Patent number: 10866544
    Abstract: A cooling device includes a sheet conveying roller, and a duct. The sheet conveying roller is configured to convey a sheet in a sheet conveyance direction. The duct is configured to convey air to a sheet conveyance passage. The duct includes a first blowing port configured to blow air toward the sheet conveyance passage, and a second blowing port configured to blow air toward the sheet conveying roller.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: December 15, 2020
    Assignee: Ricoh Company, Ltd.
    Inventor: Ruki Midorikawa
  • Patent number: 10866540
    Abstract: A developing device includes a latent image carrier to form an electrostatic latent image is formed on a surface of the latent image carrier, a developing agent carrier to carry a developing agent including toner on a surface of the developing agent carrier, the developing agent carrier facing the latent image carrier, and a roll-shaped member facing the developing agent carrier to form a first gap and facing the latent image carrier to form a second gap, to form a suction air flow through the first gap and the second gap, to suction toner particles scattered to the first gap between the roll-shaped member and the developing agent carrier and the second gap between the roll-shaped member and the latent image carrier.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: December 15, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Kiyofumi Morimoto
  • Patent number: 10838338
    Abstract: An image forming apparatus includes an image carrying member including a transfer belt or a photosensitive drum, a transfer unit configured to transfer a toner image carried on the image carrying member to a recording medium, a fixing unit disposed above the transfer unit and configured to heat and pressurize the toner image transferred to the recording medium and fix the toner image to the recording medium, a body stay having an opposing wall facing a side surface of the fixing unit, and a positioning part provided on the opposing wall and configured to perform positioning of the fixing unit. A chipped part is provided below the positioning part in the body stay and blocks transmission of heat transmitted from the fixing unit to the body stay via the positioning part.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: November 17, 2020
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Akinori Matsuno, Takuya Miyamoto
  • Patent number: 10824098
    Abstract: An image forming apparatus includes a fixing device that fixes an image to a recording medium that is transported by applying heat; a guide member including a first guide surface that guides the recording medium to which the image has been fixed by the fixing device, a second guide surface that is opposite to the first guide surface and that guides the recording medium that is transported backward after being guided by the first guide surface, and a communicating portion that enables air to flow between the first guide surface and the second guide surface; and plural suction members that cool the recording medium guided by the first guide surface by sucking air in a direction toward the second guide surface of the guide member, the suction members being arranged in a transporting direction in which the recording medium is transported.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: November 3, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Hiroki Yamazaki
  • Patent number: 10775721
    Abstract: An image forming apparatus includes: a secondary transfer roller configured to transfer a toner image onto a sheet of paper; a fixing device provided downstream in a direction in which the sheet of paper is conveyed, the fixing device including a fixing roller that is configured to fix the toner image transferred onto the sheet of paper; a paper suction fan unit configured to suction air such that air flows over the secondary transfer roller; and a guide member provided in the paper suction fan unit and configured to guide air discharged from the paper suction fan unit to be discharged toward the fixing roller. The guide member is configured to guide air in a direction crossing a rotation axis of the fixing roller at least toward each of ends of the fixing roller in a direction of the rotation axis.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: September 15, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventor: Kunihiko Naruse
  • Patent number: 10775719
    Abstract: An image forming apparatus includes an apparatus body and an exhaust unit. The exhaust unit includes a first duct and a first exhaust fan provided in the first duct. The first exhaust fan suctions air inside the first duct and sends the suctioned air to an outside of the apparatus body. The first duct is disposed at a position adjacent to the fixing unit. The first duct is divided into a plurality of air flow paths.
    Type: Grant
    Filed: December 23, 2018
    Date of Patent: September 15, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masafumi Sakamoto, Hideaki Kadowaki
  • Patent number: 10768574
    Abstract: An image forming apparatus includes a developer; a heater below the developer; and a case for covering the heater. The apparatus further includes a first air duct of which an end in a first direction side communicates with the outside and which is formed at an inner side of the case, an end of the case in a second direction side opposite to the first direction side being blocked by a blocking plate; a duct arranged between the developer and the case, a second air duct of which an end on the first direction side communicates with the outside and contacting the case and which is formed at an inner side of the duct; a fan, arranged on the second direction side of both the first and second air ducts, configured to blow out air in the first direction side; a cover; and a guide.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: September 8, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takashi Ogiwara, Masafumi Yoshida, Kazuyoshi Takeshita, Kazumasa Yasui
  • Patent number: 10761473
    Abstract: A developing device includes a housing, a developer holding device, and a directing device. The housing includes a container portion containing developer and has a developing opening. The developing device has a through portion disposed at a portion of the housing including a downstream edge portion at a downstream portion of the developing opening in a direction in which the developer holding device is rotated. The through portion has an inlet, an outlet, and a passage that connects the inlet and the outlet to each other so as to allow part of an airflow generated by rotation of the developer holding device to be introduced thereinto and flow therethrough. The directing device extends from a portion of the housing opposite to the developing opening with the inlet of the through portion interposed therebetween toward the developer holding device so as to direct the part of the airflow toward the inlet.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: September 1, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kazunari Yamagishi, Takafumi Wakai
  • Patent number: 10725418
    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: April 5, 2019
    Date of Patent: July 28, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Youngsu Lee, Yuntae Kim, Eogkyu Kim, Heungsup Park
  • Patent number: 10710825
    Abstract: A cart chassis is described which includes: multiple areas inside the chassis to accommodate either of two different types of modular accessory trays in multiple configurations. An upper platform of the chassis is to support a print engine.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: July 14, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Kevin Lo
  • Patent number: 10671020
    Abstract: An image forming apparatus including a facing portion provided at a position facing a surface of an image bearing member that corresponds to a portion between a transfer unit and a cleaning unit, wherein a first space for conveying the recording material from the transfer unit to the fixing unit, and a second space between the surface of the image bearing member and the facing portion are formed in the image forming apparatus, and wherein the image forming apparatus includes a block member positioned in the second space and having one end side fixed to the facing portion on a side closer to the first space, the block member being configured to block a flow of an air current, the block member having the other end side in contact with the image bearing member.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: June 2, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mahito Yoshioka, Takashi Yano, Yuji Mitsui
  • Patent number: 10620584
    Abstract: An image forming apparatus includes: an exterior of a main body of the image forming apparatus, the exterior including a vent hole; a substrate provided in an inner side of the main body with respect to the exterior so as to face the vent hole and configured to mount an electronic component; and a sheet member including a hole and flexibility, the sheet member being disposed so that the hole and the vent hole overlap with each other at a position between the exterior and the substrate, the sheet member being formed in a loop shape so that a portion that does not have the hole covers the hole with a gap.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: April 14, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masashi Sawada
  • Patent number: 10606195
    Abstract: A toner image is formed on a first sheet surface and then heated. A conveyance unit includes a first rotary member configured to contact the first sheet surface and a second rotary member configured to contact a second sheet surface opposite to the first sheet surface. A conveyance guide is provided with an opening through which air is blown to the first sheet surface. The conveyance guide includes a first surface part and a second surface part. The first surface part is disposed on a location in a width direction overlapping with a location in the width direction of the first rotary member. In at least a part of a range between the opening and the first rotary member in the sheet conveyance direction, the first surface part is protruded with respect to the second surface part in a height direction.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: March 31, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Keita Nakajima, Kenji Abe, Tomonari Inoue, Takehito Osada, Ko Katahira
  • Patent number: 10599096
    Abstract: Provided is an image forming apparatus that cools a cooled unit with high cooling efficiency in the longitudinal direction with a simple structure. A connecting opening portion is provided in a boundary surface that partitions between a cooling duct and a parallel duct. A rectifying plate is shaped so as to deflect a flow of air from the right side to the left side in the vicinity of the connecting opening portion toward the lower side or toward the upper side. Low-temperature cooling air flow from the parallel duct into the cooling duct via the connecting opening portion. Alternatively, inside the cooling duct, high-temperature cooling air is removed through the connecting opening portion.
    Type: Grant
    Filed: February 9, 2019
    Date of Patent: March 24, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Shogo Usui
  • Patent number: 10564600
    Abstract: An image forming apparatus includes an image forming portion configured to form a toner image on a recording material, a fixing portion configured to fix the toner image on the recording material, a stacking portion configured to stack the recording material on which the toner image is fixed, an air passageway provided between the image forming portion and the fixing portion and between the image forming portion and the stacking portion, and an air blowing portion configured to blow air to the air passageway from outside of the image forming apparatus. The air passageway is configured so that the air blown from the outside by the blowing portion passes below the stacking portion and, thereafter, is folded back below the fixing portion and, then, passes again below the stacking portion.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: February 18, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoji Oya
  • Patent number: 10551794
    Abstract: A developing device includes a developer vessel, a flow-path forming portion, and an exhaust duct. The developer vessel accommodates developer composed of toner and carrier. The flow-path forming portion includes a plurality of connection flow paths. The exhaust duct has an intake port communicating with the plurality of connection flow paths, and a filter that covers the intake port is disposed at the intake port of the exhaust duct. Each of the plurality of connection flow paths has an inlet communicating with an internal space of the developer vessel, an outlet communicating with an internal space of the exhaust duct, and a cross-sectional area increasing 5 to 20 times from the inlet toward the outlet.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: February 4, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Hiroshi Kawahito
  • Patent number: 10509363
    Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: December 17, 2019
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
  • Patent number: 10481552
    Abstract: An image forming apparatus that forms a toner image on a recording medium includes an image forming unit that forms an unfixed toner image on a recording medium; a fixing unit that heats the recording medium bearing the unfixed toner image and fixes the unfixed toner image onto the recording medium at a nip portion; a heating member and a pressurizing member that touches the heating member and forms the nip portion therebetween; a first blower that blows air to a non-sheet-passing area of a small-size recording medium in the heating member; and a second blower that blows air to a non-sheet-passing area of a small-size recording medium in the pressurizing member. Upon the temperature of the non-sheet-passing area of the heating member exceeding a threshold temperature, the first blower blows without the second blower blowing, then the two blowers start blowing together.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: November 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taisuke Minagawa, Satoru Izawa, Takahiro Uchiyama, Jun Asami, Toshiya Kaino, Wataru Uchida, Ken Murooka, Yasuhiko Fuse, Masatoshi Yoshida, Tomooku Koyama
  • Patent number: 10481525
    Abstract: A development device includes components such as a housing, a magnetic roll in the housing that moves marking material in the housing, a donor roll in the housing that is positioned to receive the marking material from the magnetic roll, a manifold in the housing, etc. The manifold has a manifold opening positioned to create airflow from the surface of the donor roll. Further, such structures include a seal over the manifold opening. The seal is a component that has a planar linear surface with seal openings that are aligned with the manifold opening. The edge of the housing adjacent the manifold opening is a first distance from the magnetic roll and the edge of the seal is a second, closer distance from the magnetic roll.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: November 19, 2019
    Assignee: Xerox Corporation
    Inventors: Eliud Robles Flores, Douglas A. Gutberlet, Michael Grew, Charles D. Deichmiller, Terry L. Dreier
  • Patent number: 10466644
    Abstract: An exposure window component is provided so as to be separated from an exposure device housing and is attached to an opening through which light from the exposure device housing passes. The exposure window component includes: a transmitting member that allows light from the exposure device housing to pass therethrough; a holding frame that holds the transmitting member; a receiving member that is provided at a periphery of the opening to receive the holding frame when the transmitting member is attached and that removably supports the transmitting member; and a grasping part that is provided at a portion of the holding frame and is grasped when the transmitting member is attached and removed.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: November 5, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Kenichiro Yano
  • Patent number: 10466647
    Abstract: An image forming apparatus includes a duct through which air taken in from outside a housing is sent into the housing, a blower fan provided at an upstream end of the duct, a toner bottle provided facing a wall surface of the duct, and a fixing section provided on a downstream side of the toner bottle. A component-facing section facing the toner bottle is formed to be smaller in cross-sectional area than a fan placement section. Therefore, by absorbing heat of air around the toner bottle via a wall of the component-facing section, the component-facing section prevents the toner bottle from becoming hot.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: November 5, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hiroki Kanemitsu, Shinichi Takeda, Noriaki Taguchi, Hiroki Shintani
  • Patent number: 10452003
    Abstract: A developing apparatus includes a developing container, a rotatable developer bearing member, a magnet, and a wall portion. The magnet is provided in the developer bearing member and has a first magnetic pole and a second magnetic pole of the same polarity as the first magnetic pole. The second magnetic pole is adjacent to and downstream of the first magnetic pole in a rotation direction of the developer bearing member. The wall portion is disposed to face the developer bearing member in an area downstream of the first magnetic pole and upstream of the second magnetic pole in the rotation direction and is configured such that gaps between the wall portion and respective end portions of a developer bearing area in a rotation axis direction of the developer bearing member are smaller than a gap between the wall portion and a center portion of the developer bearing area.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: October 22, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Ryohei Terada
  • Patent number: 10416597
    Abstract: An image forming apparatus, having a body, a fuser to fix an image on a recording medium by heat, an interface to accept a value for a first time, which is between an end of fixing by the fuser until entry into a low power-consuming condition for the heater, a fan, and a controller, is provided. The controller sets a second time being a predetermined length and subtract the second time from the first time to obtain a third time. If the third time is given a positive value, the controller continues driving the fan after the end of the fixing and throughout the third time, and inactivates the fan after the third time. If the third time is given a value smaller than or equal to zero, the controller inactivates the fan during the first time before the entry into the low power-consuming condition.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: September 17, 2019
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Daisuke Ishizuka, Yuichi Ikeno, Atsushi Hayakawa
  • Patent number: 10409219
    Abstract: An image forming device includes: an endless belt that transfers an image onto a sheet; a driving mechanism that drives the endless belt; a nip that transfers an image onto the sheet; a pressing rotational part that presses a front side of the endless belt that is a face onto which an image is transferred, and is rotated together with movement of the endless belt; and an blowing mechanism to blow out air to the pressing rotational part.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: September 10, 2019
    Assignee: KONICA MINOLTA INC.
    Inventor: Toshimitsu Morioka
  • Patent number: 10409205
    Abstract: An image forming apparatus includes: a drum unit having an image carrier carrying a toner image; a fixing unit having a heating member and pressure member forming a fixing nip part with the heating member and fixing the toner image on a recording medium at the fixing nip part; a cooling duct provided between the drum unit and the fixing unit preventing heat transfer from the fixing unit to the drum unit; and a cooling fan causing the air to flow to the cooling duct. The cooling duct is a movable duct being changeable to a first state in which the cooling duct is unopen towards the fixing unit and a second state in which the cooling duct is open towards the fixing unit. The cooling duct changes to the first state during image formation by the drum unit and changes to the second state after the image formation.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: September 10, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hirohito Konishi
  • Patent number: 10338523
    Abstract: An image forming apparatus includes a fixing portion, a sheet conveying portion, a first airflow generating portion, a setting processing portion, and a first drive processing portion. The fixing portion heats a sheet on which a toner image has been transferred to fix the toner image to the sheet. The sheet conveying portion conveys a sheet along a conveyance path that leads to a sheet discharge port via the fixing portion. The first airflow generating portion includes a first fan and generates an airflow flowing upstream from the fixing portion in a conveyance direction of the sheet. The setting processing portion sets a drive speed of the first fan based on either or both of a sheet size, and a conveyance interval at which the sheet conveying portion conveys the sheet. The first drive processing portion drives the first fan at the drive speed set by the setting processing portion.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: July 2, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Shinji Yamane
  • Patent number: 10331061
    Abstract: A developing device includes a rotatable developing member carrying a developer containing toner and a carrier to a developing position and a magnet provided fixedly inside the rotatable developing member and including first and second magnetic poles. A cover portion opposes the rotatable developing member. A most upstream end of the cover portion is positioned downstream of an uppermost position of the rotatable developing member and upstream of a most upstream position of a half-width of magnetic flux density of the first magnetic pole, and a most downstream end of the cover portion is positioned downstream of a first peak position and upstream of a position where the magnetic flux density of the first magnetic pole is a minimum on a side downstream of the first peak position and upstream of a second peak position where magnetic flux density of the second magnetic pole is a maximum.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: June 25, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masafumi Takahashi, Ryohei Terada, Yushi Sadamitsu, Yasuhiro Shimoi, Yutaka Koga, Yukihiro Soeta
  • Patent number: 10301140
    Abstract: A printer includes: a housing; a paper delivery table on which paper sheets delivered from an inside of the housing are stacked; a suction fan that sucks a gas that cools down the inside of the housing from an outside of the housing; and a first suction port that is a suction port through which a gas is sucked from the outside of the housing by the suction fan and through which a gas below a paper sheet that is delivered from the inside of the housing is sucked.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: May 28, 2019
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Tsuyoshi Iwano, Masaru Ohmori, Yasuko Yamamoto, Keiichi Matsukawa, Masahiro Kato
  • Patent number: 10301130
    Abstract: According to the present disclosure, a first guide unit is provided with a first opening portion through which light in an optical path connecting a first optical element unit and a second optical element unit passes, a second guide unit is provided with a second opening portion through which light in the optical path connecting the first optical element unit and the second optical element unit passes, the first guide unit is provided with a duct for sending air to the first optical element unit, and the air coming out from the first opening portion hits the second optical element unit via the second opening portion.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: May 28, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takafumi Suzuki, Yasuhiko Okuma, Yusuke Jota
  • Patent number: 10274895
    Abstract: An apparatus including a case that includes an electro conductive housing that accommodates a circuit board on which an electronic component is mounted and that includes a first opening for accommodating the circuit board, an electro conductive top plate that is disposed so as to cover the first opening and that includes a second opening, a HDD that is separated from the circuit board with the top plate and is connected to the circuit board, and a signal wire that connects the circuit board and the HDD to each other thorough the second opening. The apparatus includes an electro conductive cover to cover the HDD and the signal wire, and a duct portion formed between the electro conductive cover and the top plate and passes external air from below the HDD to the housing though the second opening.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: April 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Hiromichi Koseki
  • Patent number: 10268159
    Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: April 23, 2019
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
  • Patent number: 10254675
    Abstract: An optical writing apparatus includes: a light source panel including light emitting elements arranged on an elongate glass substrate; an optical member that causes emergent light to form an image; a first holding member holding the optical member; and a second holding member holding the glass substrate, wherein legs are provided below the first holding member on sides of both ends, the legs extending downward, drooping ends of the legs being mounted and fixed on the second holding member, one end of the glass substrate is positioned inside the space, an integrated circuit being provided, a through hole is provided to an upper surface of the second holding member, and when cooling air for the integrated circuit flows into the space, the cooling air is guided through the through hole to a side of a lower surface of the upper surface of the second holding member.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: April 9, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takafumi Yuasa, Akira Taniyama, Hidenari Tachibe
  • Patent number: 10228645
    Abstract: An image forming apparatus includes: a printing unit for making printing on a print medium; a communicating unit for communicating with an external apparatus; a controlling unit for controlling the image forming apparatus; a storing unit for storing print data which is used by the printing unit; and a power controlling unit for transferring the image forming apparatus to a power saving state in which power supply to the controlling unit and the storing unit is stopped. The communicating unit outputs a first signal to the power controlling unit in a case where a destination port number of data received from the external apparatus in the power saving state is a predetermined port number, and the power controlling unit supplies power at least to the storing unit in response to input of the first signal.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: March 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Atsushi Hikichi
  • Patent number: 10228640
    Abstract: An image forming apparatus includes an image forming unit that forms a toner image, a transfer portion that transfers the toner image onto a sheet, and a fixing unit that fixes the toner image to the sheet. A compressor outputs air based on a drive current supplied from a power source, and a detection portion detects the drive current. An ejection portion ejects the air output from the compressor, and a pipe supplies the air output from the compressor to the ejection portion. In addition, a determination unit determines a characteristic expression indicating a relationship between the drive current and an air pressure of the air based on a first detection result obtained by the detection portion when the air pressure is adjusted to a first predetermined value and a second detection result obtained by the detection portion when the air pressure is adjusted to a second predetermined value.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: March 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitaka Yamazaki, Takashi Umemoto
  • Patent number: 10191448
    Abstract: According to one embodiment, there is provided an image forming apparatus including a fixing portion, an exterior member, a first ventilation guide, a second ventilation guide, and a blowing portion. The exterior member has a first opening portion opened to an outside. The first ventilation guide is disposed between the fixing portion and the exterior member. The first ventilation guide forms a first space communicating with the first opening portion between the first ventilation guide and the exterior member. The second ventilation guide is disposed between the fixing portion and the first ventilation guide, and has a second opening portion. The second ventilation guide forms a second space communicating with the second opening portion between the second ventilation guide and the first ventilation guide.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: January 29, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takashi Ogiwara, Kazumasa Yasui
  • Patent number: 10185256
    Abstract: An image forming apparatus for forming a toner image on a sheet includes a main assembly, an image forming station provided in the main assembly and configured to form a toner image on the sheet, and a fixing portion provided in the main assembly and configured to fix the toner image formed on the sheet, on the sheet, the fixing portion including a fixing rotatable member and a covering member covering the rotatable member. The image forming apparatus also includes a suction mechanism including a duct connected with an opening provided in the covering member, and a fan configured to suck air inside the covering member through the duct. The air sucked by the suction mechanism is discharged into a space in the main assembly other than a space through which the sheet passes.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: January 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiji Inada, Seiji Obata, Shizuma Nishimura, Michio Uchida, Yoji Oya
  • Patent number: 10175614
    Abstract: A belt device includes a plurality of support rotators, a belt, a cleaner, and a rotator inclination unit. The belt is looped around the plurality of support rotators and moves according to rotation of the plurality of support rotators. The cleaner contacts a surface of the belt to remove foreign substances. The rotator inclination unit inclines an inclined support rotator that is at least one of the plurality of support rotators. The cleaner is disposed in contact with a portion of the belt stretched taut between the inclined support rotator and another support rotator. A pushing amount of the cleaner relative to the belt varies according to inclination of the inclined support rotator and is smallest in a state in which the inclined support rotator is not inclined by the rotator inclination unit.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: January 8, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiki Hozumi
  • Patent number: 10175649
    Abstract: A system and method for removing toner and particles from a developer cavity of an electrostatic process unit of a toner-based printer includes a filter displaced over at least a portion of the developer cavity, and a fan configured to draw a volume of air through the filter from the portion of the developer cavity adjacent to the filter. The fan is coupled to the photoconductive drum of the electrostatic process unit and rotates when the photoconductive drum rotates. The rotation of the fan generates a negative pressure on the filter which draws the volume of air through the filter. The filter removes airborne toner and particles from the volume of air. The toner and particles are removed from the electrostatic process unit by an associated auger.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: January 8, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba TEC Kabushiki Kaisha
    Inventors: Donald W. Stafford, William M. Connors