Forced Air Circulation Patents (Class 399/92)
  • Patent number: 11480902
    Abstract: A sheet heating device includes: a heat roller including a lamp heater; a fixing frame supporting end parts of the heat roller and the lamp heater; and a heat-insulating cover member provided outside of the fixing frame. The fixing frame is disposed so as to cover the space above the heat roller. A plurality of heat retention spaces is provided inside of the cover member so as to be partitioned from one another and to be opened toward the fixing frame.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: October 25, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Minoru Tomiyori
  • Patent number: 11467534
    Abstract: An example image forming apparatus includes an image forming unit to form a toner image on a print medium, a fusing unit to fix the toner image to the print medium, a duct comprising an air inlet located adjacent to an exit of the fusing unit and an air discharge outlet located toward a discharge outlet through which the print medium is discharged, and a blower provided in the duct to discharge air to the air discharge outlet.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: October 11, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jaewon Choi, JeongYong Ju, Yunsung Lee
  • Patent number: 11460806
    Abstract: A fixing device includes a first feeder provided downstream of a fixing portion heating a toner image formed on a first side of a sheet in a feeding direction, a second feeder provided adjacent downstream of the first feeder, and a guide contacting with a second side of the sheet fed by the first feeder and guiding toward the second feeder, a blower, a first duct guiding the air at a first position between the first and feeders, and a second duct at a second position between the first position and the first feeder. The first and second feeders are contactable to the sheet over an entire width. The air from the blower passes through the first duct, is sent to a feeding passage formed between the first and second feeders from the first position, and sent to the second side, then, the air passes through the second duct from the feeding passage via the second position and is exhausted.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: October 4, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takanori Sakurai
  • Patent number: 11460800
    Abstract: An imaging device has a fuser assembly and a removably insertable cartridge with an activation device. The fuser assembly has a fusing nip that heats during use. A shutter moves between a fully opened and fully closed position to allow or block access to the fusing nip. A frame has an opening to allow passage of the activation device of the cartridge. During use, the shutter blocks access to the fusing nip until the activation device of the cartridge passes through the opening of the frame and contacts a corresponding activation surface, whereby the shutter begins opening and travels through a range of movement until reaching the fully opened position when the cartridge is fully inserted into the imaging device. Removal of the cartridge reverses the action of the shutter.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: October 4, 2022
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventor: Virgil Johnson, Jr.
  • Patent number: 11454927
    Abstract: An image forming apparatus includes a flow passage associated with a direction of flow and a particle collecting device including a filter to collect particles in a fluid passing through the flow passage in the direction of flow. The flow passage includes a curved portion, and a distribution in particle collecting performance of the filter in a direction perpendicular to the direction of flow results from the curved portion of the flow passage.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: September 27, 2022
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Takashi Nakazawa, Manabu Ono
  • Patent number: 11442383
    Abstract: A cooling device for cooling a recording material on which a toner image is fixed includes: a rotatable feeding belt configured to feed the recording material by rotation; a rotatable member configured to nip and feed the recording material in cooperation with the feeding belt; and a heat sink contacting an inner peripheral surface of the feeding belt. The feeding belt contains a fluorine-containing resin additive.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: September 13, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazunari Hatazaki
  • Patent number: 11429063
    Abstract: When a process cartridge is mounted, air introduced to inside an image forming apparatus via an intake unit flows in a space surrounded by a housing of the process cartridge, a contact unit, and an arm unit, and is exhausted via an exhaust unit. When another process cartridge having a housing larger in size than a housing of the process cartridge is mounted, the air introduced to inside the image forming apparatus via the intake unit flows in a space surrounded by the housing of the another process cartridge having the larger housing, a contact unit, and the arm unit, and is exhausted via the exhaust unit.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: August 30, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuji Mitsui
  • Patent number: 11413885
    Abstract: A transportation device includes a cover member that is displaceable between a closing position for closing an opening of a body case and an opening position for opening the opening, a processing unit that is arranged inside the body case, and performs a specified processing with respect to a medium transported to a working area communicating with the outside of the body case through the opening when the cover member is positioned at the opening position, and a transmitted unit that is positioned at a first position different from a position between the working area and the processing unit when the cover member is positioned at the closing position, and is positioned at a second position which is the position between the working area and the processing unit when the cover member is positioned at the opening position.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: August 16, 2022
    Assignee: Seiko Epson Corporation
    Inventor: Eiji Kumai
  • Patent number: 11409212
    Abstract: A heating device includes a heater, a housing, an airflow path, and an outer airflow path. The airflow path is configured to flow air from an airflow generator into the housing. The outer airflow path is configured to flow air from the airflow generator to an outer face of the housing.
    Type: Grant
    Filed: July 2, 2021
    Date of Patent: August 9, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventor: Hiroshi Yoshinaga
  • Patent number: 11412099
    Abstract: An image reading apparatus includes a first image reading unit, a second image reading unit provided on a side opposite from the first image reading unit with respect to a sheet feeding passage, a first guiding member, a second guiding member, a first unit holding the first image reading unit and the second guiding member, and a second unit holding the second image reading unit and the first guiding member. One of the first unit and the second unit is movable relative to the other unit so as to open the sheet feeding passage.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: August 9, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyoshi Watanabe, Kazuhisa Okuda, Michiaki Endo
  • Patent number: 11409237
    Abstract: A developing device includes a developer roller to rotate in a rotation direction, a photosensitive body adjacent the developer roller, and an air flow passage extending through a non-image forming region at a longitudinal end of the developer roller. A closest position is defined where the developer roller and a photosensitive body are closest to one another. The air flow passage extends from inside the developing device and forms an air flow directed toward an upstream side of the closest position, relative to the rotation direction of the developer roller.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: August 9, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Naoya Iwata
  • Patent number: 11402799
    Abstract: An image forming apparatus for forming a toner image on a recording material includes a fixing unit and a blower unit to blow air around a roller. The fixing unit includes a tubular shape film, a heating member disposed in a space surrounded by the film, and the roller forming a nip portion with the heating member. The fixing unit heats and fixes the toner image onto the recording material at the nip portion. For printing that forms toner images on continuously conveyed recording materials where a roller surface temperature is lower than a predetermined temperature, fan stop and operation periods are set. During the fan stop period, the blower unit is stopped and an interval between preceding and subsequent recording materials is widened. During the fan operation period, the blower unit is in operation and the interval is narrower than the interval during the fan stop period.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: August 2, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Tanaka, Shingo Ito
  • Patent number: 11294317
    Abstract: An image forming apparatus, including: an apparatus main body; an openable and closable member provided on the apparatus main body; an image reading portion configured to read an image of an original, the image reading portion being supported on the apparatus main body and being movable to a first position and to a second position; and a stopper member configured to move in conjunction with a movement of the image reading portion, wherein when the image reading portion is moved to the first position, the stopper member is moved to a restricting position for restricting the openable and closable member from moving from a closed position to an open position, and wherein when the image reading portion is moved to the second position, the stopper member is moved to an allowing position for allowing the openable and closable member to move from the closed position to the open position.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: April 5, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shogo Miyakawa, Masaaki Takeuchi
  • Patent number: 11269283
    Abstract: A filter unit (300) includes: a chassis (303) that has a suction portion (301) provided at a front side thereof, has an exhaust portion (302) provided at a rear side thereof, and is provided internally with an upstream filter (331); a plurality of upstream first ribs (323) disposed parallel to sidewalls of the chassis (303) to rise from a bottom surface (322) of the chassis (303) and forming an upstream first airflow path (P11); a plurality of upstream second ribs (313) disposed parallel to the sidewalls of the chassis (303) to rise from a ceiling surface (312) of the chassis (303) and forming an upstream second airflow path (P21); an upstream first shield plate (315) raised from the ceiling surface (312) to cover up a front of the upstream filter (331) while forming an upstream first gap (S11) with the bottom surface (322); and an upstream second shield plate (325) raised from the bottom surface (322) to cover up a rear of the upstream filter (331) while forming an upstream second gap (S21) with the ceiling
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: March 8, 2022
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Takashi Morita
  • Patent number: 11209773
    Abstract: A cartridge includes a drum unit and a development unit. The drum unit includes a photosensitive drum, a frame, a transfer roller, and a cleaning member. The development unit includes a development roller, and a memory. The cleaning member is configured to come into contact with the photosensitive drum at a region between a development nip portion and a transfer nip portion in a circumferential direction of the photosensitive drum and at an end portion of the photosensitive drum in a direction of the rotational axis. The frame has an exposing hole through which the memory is exposed from the frame, and a recessed portion that is adjacent to the exposing hole in the direction of the rotational axis, and stores foreign matters removed from the photosensitive drum by the cleaning member.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: December 28, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriyuki Komatsu, Masaki Ojima, Daisuke Abe, Tomonori Mori, Tadayuki Tsuda, Tetsuya Numata, Naoya Asanuma
  • Patent number: 11209771
    Abstract: An image forming apparatus includes an image forming device, a sheet feeder, and a housing. The image forming device forms an image on a recording medium. The sheet feeder stores the recording medium and conveys the recording medium toward the image forming device. The housing accommodates an electrical device in the housing. The housing includes a housing body and a drawer that is drawn out from the housing body. The drawer includes a bottom plate on which the electrical device is placeable and a partition above the bottom plate on which the electrical device is placeable.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: December 28, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Shiro Akama, Tsuyoshi Endo, Tatsuya Suzuki
  • Patent number: 11194289
    Abstract: An image forming apparatus includes a casing in which multiple units are disposed. The casing has a front wall having a first opening and a stepped wall having a second opening. In the casing, an exposure unit is disposed in front of an image forming unit, above the first opening, and above a sheet loading section, and a fixing unit is disposed above the image forming unit. The exposure unit is disposed with a first gap between the exposure unit and the image forming unit, and the fixing unit is disposed with a second gap between the exposure unit and the image forming unit. The first gap and the second gap constitute a ventilation channel for distributing outside air flowing into the casing through the first opening to the second opening.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: December 7, 2021
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Dang Long Bui
  • Patent number: 11163264
    Abstract: An image forming apparatus includes a cooler and a heater. The heater includes a heat generation unit, which includes resistive heat generators arranged in a longitudinal direction of the heater, a first electrode, a second electrode, a first conductor that connects the resistive heat generators in parallel with each other to the first electrode, and a second conductor that connects the resistive heat generators in parallel with each other to the second electrode. The first and second conductors are connected to at least one of the resistive heat generators on a first longitudinal end side of the heater from a center of the resistive heat generator in the longitudinal direction of the heater. A cooling ability of the cooler to a second longitudinal end side of the heater opposite the first longitudinal end side of the heater is greater than that to the first longitudinal end side of the heater.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: November 2, 2021
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuusuke Furuichi
  • 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: 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: 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: 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: 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: 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