Photoconductive Member Patents (Class 399/116)
  • Patent number: 11016437
    Abstract: The image forming apparatus includes a cartridge replaceable by detachably mounting to the image forming apparatus, a door that takes a closed state or an open state, a locking pin that switches a state of the regulation unit between a regulating state in which the replacement unit is prevented to be detached from the image forming apparatus and a release state in which the replacement unit is to be detachable from the image forming apparatus, and a lock control unit (a control unit) that makes a determination as to whether or not the state of the regulation unit is to be switched from the release state to the regulating state, at a predetermined timing when initial processing is completed after a power source is turned on or a state of the door becomes the closed state from the open state.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: May 25, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yoshiteru Kaida
  • Patent number: 10866557
    Abstract: An image forming apparatus includes a main casing, a drum cartridge and a developing cartridge. The drum cartridge may include a first handle positioned at a first end of a frame of the drum cartridge. The developing cartridge may include a second handle positioned at a first end of a developing casing the developing cartridge. The main casing may include a first edge surface in the axial direction and a second edge surface opposite the first edge surface in the axial direction. The second handle may extend farther from the second edge surface than the first handle extends from the second edge surface in the axial direction in a state where the drum cartridge and the developing cartridge are attached to the main casing.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: December 15, 2020
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Kazutoshi Nakamura, Yasuo Fukamachi, Masaaki Furukawa
  • Patent number: 10659622
    Abstract: An image forming apparatus, includes: an image former that forms an image on a sheet; an inspector that inspects an object; and a feed path that conveys the object to the inspector, wherein the feed path is installed to bypass the image former.
    Type: Grant
    Filed: February 23, 2019
    Date of Patent: May 19, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventor: Hiroshi Isokawa
  • Patent number: 10564594
    Abstract: An image forming apparatus that forms an image on a recording medium includes an image-bearing-unit support member, a developing unit support member, a plurality of light exposure units, and a light-exposure-unit operating member. The image-bearing-unit support member is movable between the inside and the outside of the image forming apparatus while supporting a plurality of image bearing units which each include an image bearing member. The developing unit support member is movable independently of the image-bearing-unit support member. The plurality of light exposure units each cause a corresponding one of the image bearing members to be exposed to light so as to form an electrostatic latent image. The light-exposure-unit operating member moves the light exposure units relative to the developing unit support member.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: February 18, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Ogino, Tomonori Matsunaga
  • Patent number: 10495991
    Abstract: A method to make an improved organic photoconductor drum of an electrophotographic image forming device is provided. The improved organic photoconductor drum is prepared using a curable composition including a charge transport molecule containing four radical polymerizable functional groups containing an oxygen atom of the general structure shown below: wherein R1 and R2 contain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom, R3 and R4 are a non-radical polymerizable functional group, and R5 and R6 contain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom. The curable composition may also contain at least one optional curing agent.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: December 3, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: David Glenn Black, Mark Thomas Bellino, Weimei Luo
  • Patent number: 10357981
    Abstract: Provided is a unit including a unit case, a positioning frame, and a pair of through shafts. The unit case includes a first frame disposed on a downstream side in a mounting direction, a second frame disposed on an upstream side in the mounting direction, and a pair of end frames. The positioning frame is disposed on an upstream side in the mounting direction with respect to the second frame and is positioned in a direction perpendicular to the mounting direction with respect to an image forming apparatus main body. The through shaft penetrates the first frame, the second frame, and the positioning frame. The through shaft is provided with a regulating pin that engages with the image forming apparatus main body so as to regulate movement of the unit case in an attachment/detachment direction.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: July 23, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Kuniaki Araishi
  • Patent number: 10191401
    Abstract: An image forming apparatus has an image forming unit configured to form an image on a sheet, a first frame having a plate-like shape and made of metal, the first frame being configured to support the image forming unit, a second frame arranged on an opposite side, with respect to the first frame, of the first frame with sandwiching the image forming unit therebetween, the second frame having a plate-like shape and made of resin, the second frame being configured to support the image forming unit in association with the first frame, a third frame bridging between the first frame and the second frame, a sheet supplying unit being secured to the third frame, and a contacting part formed to each of the first frame and the second frame, contact parts formed to the third frame being configured to contact the first and second frames, respectively.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: January 29, 2019
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Yoshikazu Shimizu
  • Patent number: 10191436
    Abstract: A photosensitive drum unit includes a photosensitive drum having a cylinder, a rotational force receiving member, a spherical member including a projected portion, and a drum flange provided at one end portion of the cylinder and accommodating the spherical member. The drum flange includes (i) a hole portion capable of accommodating the spherical portion and having an opening that opens outwardly in the longitudinal direction of the cylinder, (ii) a groove portion that continues from the hole portion and is capable of accommodating the projected portion for receiving the rotational force from the projected portion, and (iii) a limiting portion for limiting inward movement of the spherical portion in the longitudinal direction of the cylinder.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: January 29, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ken Kikuchi, Yoshiyuki Batori
  • Patent number: 10185259
    Abstract: An endless belt includes a base layer and a resin layer. The base layer includes a metal film. The resin layer is laminated on an outer side of the base layer. The resin layer includes edge portions in an axial direction with at least one edge portion of the edge portions made narrower than the base layer in the axial direction such that the outer side of the base layer is exposed.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: January 22, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuzuru Kudoh, Hiroyuki Endo, Tetsushi Aimi
  • Patent number: 10139747
    Abstract: An electrophotographic roller includes an electro-conductive shaft core including a metallic layer at its surface, and an elastic layer on the shaft core. When kinetic friction coefficients of an outer peripheral surface of each end portion of the shaft core with respect to polyester resin are measured for one rotation of the shaft core, an average value ?r of the kinetic friction coefficients is 0.05 to 0.50. When each outer peripheral surface is divided into three equal ranges, defined as a region A1, a region A2, and a region A3, in a peripheral direction of the shaft core, each of the regions has a location where the kinetic friction coefficients fall within a range of 1.5 ?r to 1.8 ?r, and a location where the kinetic friction coefficients fall within a range of 0.2 ?r to 0.5 ?r.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: November 27, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoru Yamada, Toshiro Suzuki, Yuya Tomomizu, Toshimitsu Nakazawa
  • Patent number: 9933723
    Abstract: An image forming apparatus includes an image carrier and a charge removing portion. An electrostatic latent image is formed on the image carrier. The charge removing portion includes: a light source configured to emit light to be used for removing charge from the image carrier; a light concentrating portion configured to concentrate the light emitted from the light source on a surface of the image carrier; and a light source supporting portion formed integrally with the light concentrating portion and supporting the light source at a supporting position in which the light source and the light concentrating portion have a predetermined positional relationship.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: April 3, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yosuke Saito
  • Patent number: 9910379
    Abstract: Provided a charging member comprising an electro-conductive support and an electro-conductive surface layer, the surface layer including on the outer surface thereof, concave portions that are independent of each other, and holding an insulating particle in each of the concave portions, the insulating particle being exposed to the surface of the charging member and forms a convex portion on the surface of the charging member, in an orthogonal projection image of which the concave portions and the insulating particle are projected on a surface of the electro-conductive support, a site in which an outer edge of a projection image derived from the insulating particle and an outer edge of a projection image derived from each of the concave portions are separated, exists, and a part of a wall of each of the concave portions constitutes a part of the surface of the charging member.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: March 6, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takumi Furukawa, Hiroaki Watanabe, Kenya Terada, Yuya Tomomizu, Toshiro Suzuki, Kenichi Yazawa, Kazuhiro Gesho
  • Patent number: 9910404
    Abstract: A process cartridge includes: a developing unit; a drum unit; an urging member; and an electrically-conductive member. The developing unit includes a developing roller. The drum unit includes a photosensitive drum. The developing unit is pivotally movable relative to the drum unit about a pivot axis extending along the developing roller. The urging member is configured to urge the developing roller toward the photosensitive drum. The electrically-conductive member is provided at the developing unit and configured to apply voltage to the developing roller. The electrically-conductive member is made of an electrically-conductive resin. The electrically-conductive member includes a contact portion configured to contact an electric contact provided at an image forming apparatus. The pivot axis and the contact portion define a first distance therebetween. The pivot axis and the urging member define a second distance therebetween. The first distance is smaller than the second distance.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: March 6, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Junichi Yokoi
  • Patent number: 9878848
    Abstract: Disclosed is a friction feeder configured to allow for the removal and replacement of wear parts such as friction belts, drive belts and friction meter wheels without the need to significantly disassemble the machine and without the need for tools. The rollers are mounted only on one end in a cantilever manner to aid in the access to the friction belts. The rollers are releasably held in tension with a hand-actuatable piston. The roller ball assembly can be rotated clear of the product holding position without the use of tools. The friction meter wheel assembly can then be accessed and replaced. A piston also releasably holds the drive belt pulleys in tension so that the drive belts can be replaced.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: January 30, 2018
    Assignee: MGS Machine Corporation
    Inventors: Timothy Allen Bahr, Richard Allen Bahr
  • Patent number: 9760054
    Abstract: An image forming apparatus includes an image carrier unit, a developing device, and an intermediate transfer body. The image forming apparatus body includes a positioning member having a positioning hole for inserting a positioning pin in a mounting direction and a guiding member including a guide rail portion for guiding the image carrier unit when mounting and removing the image carrier unit. The image carrier unit includes a sliding portion that slides with respect to the guide rail portion. When the image carrier unit is drawn from a mounted state where the image carrier unit is mounted to the image forming apparatus body, the sliding portion is drawn by a predetermined distance in parallel with the rotation shaft direction and then moves in a direction where the image carrier retreats from the developing device and the intermediate transfer body, along the guide rail portion.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: September 12, 2017
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Susumu Hanano
  • Patent number: 9594344
    Abstract: Provided is an image forming apparatus including plural developing devices that are provided side by side in a direction that is defined by an image forming apparatus main body and respectively form insertion sections into or from which housings including photoreceptors are inserted or withdrawn in a longitudinal direction on one side in a direction in which the plural developing devices are arranged, an exit mechanism that is provided in the developing device, is disposed on an inlet side of the insertion section, and exits a developer on an inside of the developing device, and guide sections of at least two portions that are provided in at least one of the developing devices adjacent to the housing and guide the housing before a surface of the photoreceptor faces the exit mechanism in an insertion direction of the housing when the housing is inserted or withdrawn.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: March 14, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hibiki Sasaki, Koichi Sato, Yoshiyuki Takashima, Atsushi Funada
  • Patent number: 9405215
    Abstract: A developer supply member, a developing unit, and an image forming apparatus are provided that maintain high-quality image forming. The developer supply member includes: a rotation shaft; a base material which covers the rotation shaft and has a closed-cell foam structure containing a silicone rubber as a main constituent; and a coating film formed on an outer surface of the base material. The developer supply member satisfies an expression of T??0.15×H+9.6, and 54?H?69, where T is a thickness of the coating film measured in micrometers and H is Asker F hardness measured in degrees on a surface of the coating film.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: August 2, 2016
    Assignee: OKI DATA CORPORATION
    Inventor: Naoki Masui
  • Patent number: 9268298
    Abstract: A process cartridge is detachably mounted on an apparatus main body of an image forming apparatus. An embodiment of the cartridge includes a developer bearer arranged to be opposed to an image bearer in a developing device and rotates; a positioning member that supports the image bearer and the developer bearer at respective ends thereof, and fixes a distance between rotating shafts of the image bearer and the developer bearer; a rotating shaft arranged on a rotating member arranged on the developing device, and having a part protruding from an outer surface of a housing frame of the process cartridge; a gear that is arranged at a distal end of the rotating shaft and transmits a rotational driving force transmitted from the apparatus main body; and a bearing that is arranged between the positioning member and the gear, is fixed to the housing frame, and supports the rotating shaft.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: February 23, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Daisuke Hamada, Jun Shiori, Hideo Yoshizawa, Natsumi Matsue, Shingo Kuboki
  • Patent number: 9182732
    Abstract: The image forming apparatus includes a drum cartridge having a photosensitive drum and a drum drive input member; a developing cartridge configured to be movably mounted to the drum cartridge, the developing cartridge comprising a developing roller disposed so as to face the photosensitive drum and a developing drive input member; a drum drive transmission member configured to engage with the drum drive input member and configured to transmit drum driving force to the drum drive input member while permitting a positional gap of the drum drive input member within a predetermined range; and a developing drive transmission member configured to engage with the developing drive input member and configured to transmit developing driving force to the developing drive input member while permitting a positional gap of the developing drive input member within a predetermined range.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: November 10, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Naoya Kamimura, Atsuhisa Nakashima
  • Patent number: 9122235
    Abstract: A process cartridge, wherein both in the case where the developing unit is at the contact position and in the case where the developing unit is at the separation position, a first regulating portion that the drum unit has and a first regulated portion that the developing unit has, are engaged with each other, whereby movement of the developing unit with respect to the drum unit in the axial direction of the developing roller is regulated, wherein in the case where the developing unit is at the separation position, a second regulating portion and a second regulated portion overlap each other in a direction perpendicular to the axial direction, and wherein in the case where the developing unit is at the contact position, the second regulating portion and the second regulated portion do not overlap each other in the direction perpendicular to the axial direction.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: September 1, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichi Fukui, Noritomo Yamaguchi, Tatsuya Suzuki, Satoshi Nishiya, Masaaki Sato, Yosuke Kashiide
  • Patent number: 9063513
    Abstract: An image forming apparatus includes a housing, an image carrying body, an exposure device, a detachable body, and a movement device. The image carrying body installed in the housing carries an image formed on its surface. The exposure device is movable between exposure and retracted positions. The surface of the image carrying body is exposed to light at the exposure position. A distance between an installation position where the image carrying body is installed in the housing and the retracted position is larger than a distance between the installation position and the exposure position. The image carrying body is disposed in the detachable body attachable to and detachable from the housing. The movement device provided in the detachable body causes the exposure device to move from the retracted position side to the exposure position side along with a movement of the detachable body being inserted into the housing.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: June 23, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takahiko Kobayashi, Masanori Seto
  • Patent number: 9037011
    Abstract: In an image forming apparatus that forms an electrostatic latent image for detection on a photosensitive member by light irradiation and performs color-misregistration correction control on the basis of detection of a change in detection current due to the detecting electrostatic latent image passing through a processing unit disposed close to the periphery of the photosensitive member, the intensity of at least one of the apply voltage of the processing unit and the output of the light irradiation unit is set higher than that during normal image formation.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: May 19, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takaaki Tsuruya
  • Patent number: 9026001
    Abstract: An image bearing member unit includes an image bearing member having a supported portion, a supporting member for rotatably supporting the supported portion, a frame for holding the supporting member, and a spacing maintaining portion provided on the frame or the image bearing member. The spacing maintaining portion is disposed outside the supported portion in a radial direction, and is disposed inside a region where the supporting member supports the supported portion. In a state in which the supporting member is not mounted on the frame, the spacing maintaining portion maintains a spacing between the frame and the supported portion in contact with the image bearing member or the frame. In a state in which the supporting member is mounted on the frame, the supporting member is inserted into the spacing between the frame and the supported portion, from outside of the spacing maintaining portion.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuya Numata, Masatoshi Yamashita
  • Patent number: 9025996
    Abstract: A method for remanufacturing a printer cartridge component is provided. The method provides a printer cartridge component having an assembled organic photoconductor (OPC) drum with a flange portion and a cylinder portion. The flange portion has a cylinder engagement end attached and inserted in a locked position with a flange lock in a first end of the cylinder portion. The method further unlocks the flange lock so that the flange portion is in an unlocked position in the first end of the cylinder portion. The method further secures the unlocked flange portion. The method further removes the cylinder portion from the secured unlocked flange portion to obtain a removed cylinder portion and a removed flange portion. The method further assembles the removed flange portion with a replacement OPC drum cylinder portion to obtain a remanufactured printer cartridge component.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: May 5, 2015
    Assignee: Mitsubishi Kagaku Imaging Corporation
    Inventor: Susumu Taguchi
  • Patent number: 8958719
    Abstract: When the acute angle between a normal line, oriented outward from a blade abutting portion of a photosensitive member over which a cleaning blade remains abutted before separation of the surface of the photosensitive member from the cleaning blade, and a horizontal plane, passing through the origin of the normal line, is expressed as a positive value when the normal line lies above the horizontal plane and expressed as a negative value when the normal line lies below the horizontal plane; an imaging unit frame so supports a photosensitive module that the photosensitive member can rotate to a specific rotational position having a greater angle than the angle at the time of separation of the surface of the photosensitive member from the cleaning blade. Until the photosensitive member rotates from a normal rotational position to the specific rotational position, the photosensitive module cannot be removed from the imaging unit frame.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: February 17, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Nobuo Kuwabara, Shinichi Kawahara, Akio Kosuge, Daisuke Tomita
  • Patent number: 8942593
    Abstract: A method of removing the imaging drum (2) of a desktop laser printer and the like wherein pressure is applied to either one or both of the stub bearings (5) of the imaging drum mounted in support bearings (7) attached to the body of the printer cartridge to dislodge the stub bearings and thereafter the application of pressure is continued to force the stub bearings out of their support bearings to allow the drum to be released. This avoids the disadvantages of present known methods one of which involves sawing through the imaging drum and then sliding the two cut halves out of their respective bearings in the printer cartridge.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: January 27, 2015
    Assignee: PBT International Limited
    Inventor: Jeremy Peter Thompson
  • Publication number: 20150023693
    Abstract: An image forming apparatus includes a housing, an image carrying body, an exposure device, a detachable body, and a movement device. The image carrying body installed in the housing carries an image formed on its surface. The exposure device is movable between exposure and retracted positions. The surface of the image carrying body is exposed to light at the exposure position. A distance between an installation position where the image carrying body is installed in the housing and the retracted position is larger than a distance between the installation position and the exposure position. The image carrying body is disposed in the detachable body attachable to and detachable from the housing. The movement device provided in the detachable body causes the exposure device to move from the retracted position side to the exposure position side along with a movement of the detachable body being inserted into the housing.
    Type: Application
    Filed: March 11, 2014
    Publication date: January 22, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takahiko KOBAYASHI, Masanori SETO
  • Patent number: 8929771
    Abstract: An image forming device includes a motor capable of positive rotation and reverse rotation, a photoconductor drum, a developing roller, a contact/separation cam and a switching cam. The contact/separation cam is configured to move the developing roller. The switching cam is configured to switch a position of a transmission member. An electromagnetic clutch is disposed between one of the contact/separation cam and the switching cam and the motor. The other cam is connected to the motor without the electromagnetic clutch. The contact/separation cam and the switching cam are driven by using the positive rotation and the reverse rotation of the motor and the electromagnetic clutch.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: January 6, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Yohei Hashimoto
  • Patent number: 8913920
    Abstract: An electrophotographic image forming apparatus detachably mountable to a main assembly of the apparatus, includes a rotatable image bearing member on which a latent image is to be formed; charging means for contacting said image bearing member to charge a surface of said image bearing member; a frame supporting said image bearing member and said charging means; a covering member, demountably mounted to said frame, for protecting the surface of said image bearing member; and a spacer member including a spacing portion, movably provided on said covering member, for entering between said image bearing member and said charging means to space them therebetween, and a retaining portion, contacting said covering member when said spacing portion is not between said image bearing member and said charging means, for preventing said spacer member from disengaging from said covering member.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: December 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuuki Nakamura, Yoshifumi Takeyama
  • Publication number: 20140356025
    Abstract: Image forming apparatuses include: a casing; an image forming unit removable from the casing in a first direction; and plural developer cartridges. The cartridges may be attached and detached with respect to the image forming unit in a second direction that is inclined toward the first direction. Other image forming apparatuses include: a casing; an exposure device; a plurality of cartridges configured to be attached and detached with respect to the casing in a first direction; and a recording medium transport system for transporting recording media adjacent the photosensitive members in a second direction. The first direction may be inclined with respect to the second direction, and at least a portion of optical paths of the light emitted from the exposure device may extend parallel with the first direction. Aspects also relate to image forming units, e.g., for use in image forming apparatuses as described above.
    Type: Application
    Filed: August 12, 2014
    Publication date: December 4, 2014
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Hiroshi Igarashi, Naoya Kamimura, Yoshiya Tomatsu
  • Patent number: 8897665
    Abstract: A photosensitive member unit includes a photosensitive member, first and second side walls, a rotatable body and a unit electrode. The photosensitive member defines an axis extending in an axial direction, and has first and second end portions in the axial direction. The first side wall rotatably supports the first end portion and the second side wall rotatably supports the second end portion. The rotatable body is rotatably disposed between the first and the second side walls. The rotatable body confronts and contacts the photosensitive member in a prescribed direction perpendicular to the axial direction to be movable in the prescribed direction. The unit electrode is provided at the first side wall and supports the rotatable body, the first side wall supporting the unit electrode to permit the unit electrode to be movable in the prescribed direction in conjunction with movement of the rotatable body in the axial direction.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: November 25, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Naoya Kamimura
  • Patent number: 8883389
    Abstract: An object of the present invention is to provide a developing apparatus which is less affected by usage environments, has high development efficiency for long term use and can provide a high quality image without image density non-uniformity. The present invention relates to a developing apparatus wherein a magnetic toner-carrying member has a work function value at the surface thereof within a specific range, a toner regulating member which regulates toner carried on the magnetic toner-carrying member is made of a specific material at a portion contacting the magnetic toner, the magnetic toner has an average circularity of 0.950 or more and the magnetic toner has a surface tension index within a specific range.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Matsui, Michihisa Magome, Shotaro Nomura, Atsuhiko Ohmori
  • Patent number: 8879950
    Abstract: An image forming apparatus includes: a main apparatus body; an opening/closing member; a drum unit including a photosensitive drum and can be pulled out of an accommodating space along an axial direction of the photosensitive drum; an exposing member provided in the main apparatus body and movable between an exposure position and an evacuation position; and a movable mechanism including: a first movable member movable in accordance with an opening/closing operation of the opening/closing member; and a second movable member for moving the exposing member between the exposure position and the evacuation position in accordance with movement of the first movable member. The second movable member supports both end portions of the exposing member. The second movable member moves the exposing member to the exposure position or the evacuation position by the movement of the first movable member in accordance with the movement of the opening/closing member.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: November 4, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Shougo Sato, Yosuke Aoi
  • Publication number: 20140314446
    Abstract: An image forming apparatus includes a frame, a photosensitive drum, an endless belt disposed above the photosensitive drum, and a pressing member. The photosensitive drum includes a drum body and a flange portion that is provided on one end portion of the drum body. The flange portion has a contacted portion and a pressed portion. The pressing member presses the pressed portion upward to permit the photosensitive drum to be in contact with the endless belt. The frame has a positioning portion disposed above the pressing member and above the photosensitive drum. The positioning portion is configured to be in contact with the contacted portion and to position the photosensitive drum when the pressing member presses the pressed portion. The pressed portion is disposed farther from the drum body in an axial direction of the photosensitive drum than the contacted portion.
    Type: Application
    Filed: June 30, 2014
    Publication date: October 23, 2014
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventor: Shougo Sato
  • Patent number: 8867960
    Abstract: An image forming apparatus including an image bearing member having a surface layer A having a surface hardness of 200 N/mm2 or greater, the surface layer A containing fillers made of a metal oxide and a cleaning blade having a reed-like elastic blade having a front edge portion to remove toner from the surface layer A in motion while the front edge portion is in contact with the surface layer A, the front edge portion having a laminate structure formed of a substrate of the elastic blade, a mixed layer of the substrate and an acrylic and/or methacrylic resin, the mixed layer having a thickness of 1.0 ?m or greater, and a surface layer B having an acrylic and/or methacrylic resin, the surface layer B having a thickness of 0.1 ?m or greater.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: October 21, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Naohiro Toda, Takafumi Iwamoto, Toshihiro Ishida, Tetsuya Toshine, Yohta Sakon, Masahiro Ohmori
  • Patent number: 8862023
    Abstract: An image forming apparatus includes a main assembly and a door for opening and closing an opening. A supporting member supports a plurality of electrophotographic photosensitive members, and is movable between (i) a first position, in which latent images are formable on the electrophotographic photosensitive members, (ii) a second position, in which the supporting member is retracted from the first position, and (iii) a third position outside the main assembly in a state in which the supporting member is supported by the main assembly. The supporting member is disengageable from the main assembly at the third position. A cover member protects an exposed portion of the plurality of electrophotographic photosensitive members exposed from the supporting member. The cover member is capable of covering and uncovering the exposed portion. The cover member is changed from an open state to a closed state by the touch of a handle portion.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: October 14, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Akinori Takayama
  • Publication number: 20140301753
    Abstract: An image forming apparatus according to an aspect of the present disclosure includes a drum unit, a developing unit, a pressing unit, and a projection portion. Drum unit includes photosensitive drum. Developing unit includes a developing roller that develops a toner image on the photosensitive drum. Each of drum unit and developing unit is configured to be extractable from an apparatus body. Pressing unit is configured to make developing unit movable between a pressing position at which developing roller is pressed against photosensitive drum and a pressing-releasing position at which developing roller is separated from photosensitive drum so as to release the pressing. Projection portion is provided integrally with developing unit and configured to be projected to an extraction path of drum unit when developing unit is located at pressing position and to retract from extraction path of drum unit when developing unit is located at the pressing-releasing position.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 9, 2014
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Hirokazu Fujii
  • Patent number: 8852833
    Abstract: Imaging members having a support, an imaging layer disposed on the support, an outer layer disposed on the imaging layer and fluoropolymer particles imbedded in an outer surface of the outer layer. Image forming apparatuses having such imaging members. Processes for preparing an imaging member for an electrophotographic apparatus, the process involving coating an imaging layer with an outer layer formulation. The imaging layer can be disposed on a support. The outer layer formulation can be dried to form an outer layer disposed on the imaging layer and has an outer surface. Fluoropolymer particles are applied to the outer layer.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: October 7, 2014
    Assignee: Xerox Corporation
    Inventors: Gregory McGuire, Richard Klenkler, Yvan Gagnon, Yu Liu
  • Patent number: 8835090
    Abstract: An object of the present invention is to provide a developing apparatus which is less affected by usage environments, has high development efficiency for long term use and can provide a high quality image without image density non-uniformity. The present invention relates to a developing apparatus wherein a magnetic toner-carrying member has a work function value at the surface thereof within a specific range, a toner regulating member which regulates toner carried on the magnetic toner-carrying member is made of a specific material at a portion contacting the magnetic toner, the magnetic toner has an average circularity of 0.950 or more and the magnetic toner has a surface tension index within a specific range.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Matsui, Michihisa Magome, Shotaro Nomura, Atsuhiko Ohmori
  • Patent number: 8787793
    Abstract: An image carrier driver includes an image carrier, a first power transmitter, a rotator, a second power transmitter, and a damper. The image carrier is configured to rotate by power generated by a driving source. The first power transmitter is configured to transmit the power from the driving source to the image carrier. The rotator is disposed further downstream than the image carrier in a flow of power transmission. The second power transmitter is configured to transmit the power from the image carrier to the rotator. The damper is disposed in the image carrier and is configured to attenuate an oscillation associated with the power transmission and transmitted to the image carrier.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: July 22, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yoshiyuki Toso, Shoichi Yoshikawa, Tadayasu Sekioka, Noboru Oomoto, Takashi Fujiwara, Naoki Miyagawa
  • Patent number: 8787797
    Abstract: A photoconductive foil sheet applicator applies a photoconductive foil sheet about a circumference of a drum.
    Type: Grant
    Filed: October 30, 2011
    Date of Patent: July 22, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael Melnik, Moshe Peles
  • Patent number: 8774676
    Abstract: A process unit includes: a photosensitive drum defining a first direction parallel to an axial direction of the photosensitive drum, and including: a tubular body having a first end portion containing a distal end; and a fitting member un-rotatably provided at the first end portion; a bearing member rotatably supporting the fitting member at a position inward from the distal end in the first direction; and a side plate configured to un-rotatably support the bearing portion.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 8, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Koji Abe
  • Patent number: 8768204
    Abstract: An image forming device includes a main casing and a photosensitive unit having photosensitive bodies arrayed in an array direction. The main casing includes a first side plate having a first primary portion extending in the array direction, and having a first positioning portion and a second positioning portion spaced away therefrom in the array direction. The photosensitive unit includes a second side plate supporting the photosensitive bodies and having a second primary portion extending in the array direction. The second side plate has a third positioning portion subjected to positioning relative to the first positioning portion and has a fourth positioning portion subjected to positioning relative to the second positioning portion. The first and third portions are overlapped with each other and the second and fourth positioning portions are overlapped with each other while the first primary portion and the second primary portion are spaced away from each other.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: July 1, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yoshiya Tomatsu, Junichi Hashimoto
  • Patent number: 8768213
    Abstract: A guide surface of an attachment guide for a cartridge attached to a position nearest to a scanner has, in the vicinity of an inlet of the attachment guide, a portion oriented so as to be away from a guide surface of a guide unit for another cartridge from the upstream toward the downstream side in the direction in which the cartridges are attached.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: July 1, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Akutsu, Tsutomu Nishiuwatoko, Ken Kikuchi
  • Patent number: 8761633
    Abstract: An image forming apparatus includes a casing, photosensitive members arranged along an arrangement direction, and developing cartridges. Each developing cartridge includes a developer carrying member configured to supply a developer to a corresponding one of the photosensitive members. Each photosensitive member is configured to move between an image formation position where an image is formed on the photosensitive member and a retracted position where the photosensitive member is retracted from the developer carrying member. When the photosensitive member is in the image formation position, the photosensitive member is configured to close a path through which a corresponding one of the developing cartridges is attached to and removed from the casing. When the photosensitive member is in the retracted position, the photosensitive member is configured to open the path.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: June 24, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Makoto Souda
  • Patent number: 8761641
    Abstract: An image forming apparatus has a latent image forming portion that includes a latent image carrier having a cylindrical shape, and a supporting member disposed at both ends of the latent image carrier and rotatably supporting the latent image carrier, a charging unit that includes a discharge electrode supplying electric charge to the latent image carrier, and a grid electrode having a shape curved around the latent image carrier, a first supporting portion that supports the curved grid electrode from the latent image carrier side, a second supporting portion that supports the curved grid electrode from the discharge electrode side, and a pinching unit that pinches the grid electrode between the first supporting portion and the second supporting portion in a contact state.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: June 24, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Arichika Tanaka, Kuniaki Tanaka
  • Patent number: 8718514
    Abstract: To facilitate replacing photosensitive drums and/or developing devices in an image forming apparatus, a photosensitive member unit including a plurality of photosensitive members is loaded in a main casing. A developing device unit including a plurality of developing devices is also loaded in the main casing. Both an intermediate transfer belt and the photosensitive member unit are configured to be movable toward and away from the developing device unit. Further, when the photosensitive member unit is separated from the developing device unit, the intermediate transfer belt and the plurality of photosensitive members are also separated from each other.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: May 6, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Satoru Ishikawa, Shougo Sato
  • Patent number: 8676085
    Abstract: An electrophotographic photosensitive drum unit includes a cylinder having a photosensitive layer at an outer periphery thereof and a drum flange provided at one end of the cylinder. The drum flange includes at least two projections provided inside of the drum flange and projected radially inwardly of the drum flange, with a space diametrically between the two projections. Each of the two projections projects radially inwardly of the drum flange to a greater extent at a position farther from the cylinder than it does at a position closer to the cylinder. Each of the two projections is provided with a recess to facilitate deformation of the projection.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: March 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiyuki Batori, Nobuyoshi Hara
  • Patent number: 8670693
    Abstract: A photosensitive drum for use with an image forming apparatus, includes a cylinder; a flange provided at a longitudinal end of said cylinder, wherein the flange has an outer diameter smaller than an inner diameter of the cylinder; and a resin material injected in a gap in a radial direction between the cylinder and the flange and fixing said flange to the cylinder.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: March 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keisuke Nomura, Tomonori Mori, Isao Koishi
  • Patent number: 8660462
    Abstract: An image forming apparatus includes an apparatus body including a positioning portion, a replaceable member that is provided so as to be attachable to and detachable from the apparatus body, and has a portion to be positioned that comes into contact with and is positioned by the positioning portion at least at one longitudinal end, and an urging mechanism that urges the portion to be positioned toward the positioning portion, wherein when the position of the replaceable member in a longitudinal direction is determined, the replaceable member is mounted on the apparatus body as the urging mechanism is switched from the state where the urging force of the urging mechanism does not act to the state where the urging force of the urging mechanism acts so that the positioning portion and the portion to be positioned come into contact with each other.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: February 25, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shinichi Ohba, Akihito Yamauchi