Development Patents (Class 399/222)
  • Patent number: 10372068
    Abstract: A developer circulated between first and second chambers in a function separation type development device including a developer discharge portion is prevented from being excessively discharged from the developer discharge portion. The developer discharge portion is disposed in the first chamber and is provided downstream of a region on a developer bearing member in the direction in which the developer in the first chamber is conveyed, the region corresponding to a maximum image region formable on an image bearing member.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 6, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Takanori Iida
  • Patent number: 10120312
    Abstract: An image forming apparatus includes an image forming device to form a toner image onto a recording medium by transferring the toner image directly or indirectly onto the recording medium, the image forming device including a developer to develop a latent image formed on an image carrier into the toner image; and a controller to control the image forming device. The controller determines whether a first estimated time period is greater than a first predetermined time period, the first estimated time period being a time period from a time when image formation of one page of the image completes to an estimated time when image formation of a subsequent page of the image will start; and stops operating the developer based on a determination indicating that the first estimated time period is greater than the first predetermined time period.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: November 6, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Uchida, Takuma Higa, Shinya Kamijo, Takeshi Takahashi
  • Patent number: 10054878
    Abstract: The driving force transmission apparatus, in which on at least one of portions of a first rotary member and a second rotary member opposed to each other under a state in which a driving rotary member and a driven rotary member are opposed to each other through a first non-engaging portion, includes a non-contact portion at which the first rotary member and the second rotary member are prevented from being brought into contact with each other is formed, wherein the non-contact portion is configured to cut torque transmitted from a driven member side to the first rotary member side through the second rotary member.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: August 21, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomoyuki Iwakoshi
  • Patent number: 10018944
    Abstract: A drive transmission mechanism includes a drive transmission gear, an output-side coupling, and a first drive transmission member. The drive transmission gear includes a cylindrical boss formed at the rotation center, a circular rim concentric with the boss, and a web coupling the boss with the rim. The output-side coupling outputs a driving force of the drive transmission gear to a driven member. The first drive transmission member has higher rigidity than the drive transmission gear, and transmits the driving force of the drive transmission gear to the output-side coupling by rotating together with the drive transmission gear. The output-side coupling incline in an arbitrary direction relative to the rotation axis of the first drive transmission member, and the driving force from the drive transmission gear is transmitted to the outer circumferential rim of the first drive transmission member.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: July 10, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Daijiro Ueno, Kenichi Mukai
  • Patent number: 9964872
    Abstract: A toner including toner particles containing a binder resin, a pigment, a crystalline resin and an amorphous resin. The adsorption rate A1 of the crystalline resin to the pigment is from 5% to 40%, and the adsorption rate A2 of the amorphous resin to the pigment is from 20% to 60%. The adsorption rates A1 and A2 satisfy relationship (1): A1<A2.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: May 8, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenta Kamikura, Kunihiko Nakamura, Tsutomu Shimano
  • Patent number: 9885867
    Abstract: In accordance with an embodiment, an image forming apparatus includes a first supporting unit and a second supporting unit, a first drive source, and a first and a second transmission unit. The first drive source is configured to provide a first drive force in a first direction and a second drive force in a second direction. When the first drive source provides the first drive force, the first transmission unit allows the first supporting unit to move by transmission of the first drive force and allows the second supporting unit to be in a stopped state by non-transmission of the first drive force. When the first drive source provides the second drive force, the second transmission unit allows the second supporting unit to move by transmission of the second drive force and allows the first supporting unit to be in a stopped state by non-transmission of the second drive force.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: February 6, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Masahiro Kodo
  • Patent number: 9594321
    Abstract: A binder resin for toner includes a carboxy group-containing vinyl resin (C), a glycidyl group-containing vinyl resin (E), a reactant thereof, and a fatty acid metal salt (M), in which the carboxy group-containing vinyl resin (C) includes a high molecular weight vinyl resin (H) having a peak in a region in which the molecular weight is equal to or more than 2.5×104 and equal to or less than 1.2×106 in the molecular weight distribution of a THF soluble content and a low molecular weight vinyl resin (L) having a peak in a region in which the molecular weight is equal to or more than 2×103 and equal to or less than 2×104 in the molecular weight distribution of a THF soluble content. The reactant of the carboxy group-containing vinyl resin (C) and the glycidyl group-containing vinyl resin (E) is formed in the presence of the fatty acid metal salt (M).
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: March 14, 2017
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Hiroshi Matsuoka, Hiroyuki Takei
  • Patent number: 9529298
    Abstract: A developing cartridge includes a developing roller 210d that develops, by way of a developer, an electrostatic latent image that is formed on an image bearing member 207; a developer regulating member that regulates the thickness of a developer carried on the developing roller 210d; and a frame 214a that rotatably supports the developing roller 210d and supports the developer regulating member. The frame 214a has a developing roller support section 214a1 that rotatably supports an outer peripheral face 210d6 of at least one end of the developing roller 210d. The developing roller support section 214a1 has a clearance at a position that, when viewed in the axial direction of the developing roller 210d, overlaps a contact region at which the developing roller 210d is in contact with the image bearing member 207.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: December 27, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kensuke Sato, Masaaki Sato
  • Patent number: 9519240
    Abstract: Provided is a developing device including a rotating member that faces a formation target member on which a toner image is formed, is rotated around a rotation shaft extruded from an end portion, and includes a holding portion having an outer circumference on which a toner is held, an accommodation member that accommodates the toner, includes a wall at which a notch is formed, and in which the rotating member is disposed in a state where the rotation shaft is extruded outwardly from an inner surface of the wall through the notch, and a fixation member that is fixed on both sides of an inner surface of the wall with interposing the notch.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: December 13, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Hideaki Ozawa
  • Patent number: 9429877
    Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting t
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: August 30, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
  • Patent number: 9395679
    Abstract: With a structure in which a coupling member includes a sphere providing a center of inclination (pivoting), a rotational force transmitted member has an opening have a diameter smaller than that of the sphere, and the coupling member is prevented from disengaging from rotational force transmitted member by contact of inner edge of the opening to the sphere, the inner edge of the opening may limit an inclinable (pivotable) angle range of the coupling member. In a state that a pin that is a shaft portion is inserted in a hole that is a through-hole provided in a coupling member, opposite end portions of the pin are supported by a driving side flange, which is a rotational force transmitted member. The coupling member, the driving side flange, and the pin are connected in this manner, and the pin contacts the inside of the hole without limiting the inclinable (pivotable) angle range, by which the coupling member is prevented from disengaging from the driving side flange.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: July 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuya Kawakami, Noriyuki Komatsu, Sho Shirakata, Isao Koishi
  • Patent number: 9327464
    Abstract: An intermediate transfer belt used for an image forming apparatus of an electrophotographic system includes: an elastic layer; and a surface layer formed on the elastic layer, wherein stress relief time ? [ms] of a material used for the elastic layer and hardness H [MPa] of the surface layer satisfy a first condition that 0.48<?<0.75 and 50<H<6275?3?13820?2+10140??2330 or a second condition that 0.75?? and 50<H<150.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: May 3, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kouichi Etou, Wanli Zhang, Junji Kanda, Kazuyoshi Ota
  • Patent number: 9274457
    Abstract: A developing cartridge having a first side plate and a second side plate spaced opposite from the first side plate, a developer carrying member rotatably supported between the side plates, a developer supplying member rotatably supported between the side plates, a input member to which driving force is input rotatably supported by the first side plate, a primary developing gear to which the driving force is transferred provided on the developer carrying member at the first side plate, a secondary developing gear to which the driving force is transferred provided on the developer carrying member at the second side plate, and a supply gear to which the driving force is transferred provided on the developer supplying member at the second side plate, wherein the input member and the supply gear are arranged so that their projections in the direction of the rotation axis of the developer supplying member overlap.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: March 1, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shuichi Kato
  • Patent number: 9168564
    Abstract: An object fabricating apparatus is comprised of at least one charged powder cloud generating system, at least one electrode proximate to the powder cloud generating system and comprising at least one shaped slot, and a voltage supply in communication with each electrode to electrostatically modulate the flow of charged powder to a conductive substrate electrically biased to provide an electrostatic attraction of the charged powder to the substrate. An object fabricating method is also disclosed that uses the object fabricating apparatus.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: October 27, 2015
    Assignee: XACTIV, INC.
    Inventors: Dan A. Hays, James Mason, Peter J. Mason
  • Patent number: 9110441
    Abstract: A cartridge is detachably mountable on a main casing. The main casing is provided with a coupling member providing a driving force. The cartridge comprises: a first roller extending in a first direction and configured to rotate about a first rotational axis; a driving force receiving portion configured to receive the driving force from the coupling member to drive the first roller and rotate about a second rotational axis, the driving force receiving portion comprising a contact portion configured to be in contact with the coupling member; and a first gear comprising a gear tooth, the gear being configured to transmit the driving force received at the driving force receiving portion to the first roller. The contact portion is overlapped with the gear tooth when projected in the first direction.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: August 18, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masatoshi Shiraki, Fumikazu Sato
  • Patent number: 8956796
    Abstract: Provided is an electrostatic charge image developing toner including toner base particles which contain a polyester resin and a vinyl resin and does not have a coating layer and wherein the concentration of the polyester resin on the particle surface is higher than the concentration of the polyester resin in the inside of the particles, and a sol-gel silica which has an average circularity of from 0.75 to 0.9, on the surface of the toner base particles.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: February 17, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Kadokura, Kazufumi Tomita, Hideaki Yoshikawa
  • Publication number: 20150016838
    Abstract: A process cartridge including a first frame member molded by pouring a resin from a gate; a conductive sheet adhered integrally to a sheet adhering portion of the first frame member by molding of the resin; and a second frame member configured to define a toner storage portion by being coupled with the first frame member, wherein, the first frame member includes a bent portion at the sheet adhering portion, and a portion of the first frame member different in thickness is provided at an adjacent position to the adhering portion.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 15, 2015
    Inventor: Kosuke Nishino
  • Patent number: 8929759
    Abstract: An image forming apparatus includes: a density detection unit that detects densities of an image developed by a developing unit at a plurality of positions in a main-scanning direction; a processing unit that obtains at least one of an amplitude and a phase of a first periodical density change of the image, of which cycle is a rotation cycle of a photosensitive drum, at the plurality of positions in the main-scanning direction on the basis of an output signal of the density detection unit, and corrects a drive signal for the light source so as to suppress the first periodical density change of the image at each position in the main-scanning direction on the basis of the rotation cycle of the photosensitive drum and at least one of the amplitude and the phase.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Muneaki Iwata, Kazuhiro Akatsu, Masaaki Ishida, Atsufumi Omori, Hayato Fujita
  • Patent number: 8913916
    Abstract: A developer contains a toner having an external additive deposited thereon. The developer is used with an image-forming apparatus including an image carrier including a surface layer in which fluoropolymer resin particles are dispersed and a cleaning member disposed in contact with an outer surface of the image carrier. The external additive is a nonspherical external additive whose volume average particle size is smaller than the average particle size of exposed portions of the fluoropolymer resin particles in the surface layer of the image carrier.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: December 16, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shinichi Kawamata, Kunihiko Sato, Sakon Takahashi, Nobumasa Furuya, Kazuhiko Arai, Masaaki Takahashi, Koji Nishimura, Daisuke Haruyama
  • Patent number: 8843015
    Abstract: An imaging device provided with a latent image carrying body rotatably disposed to carry a latent image, a developing unit that develops the latent image carried on the carrying body by using a developer containing toner at least, and a duct disposed downstream of the developing unit and having a wall with an upstream suction port and a downstream suction port formed. An air flow path is formed by a surface of the latent image carrying body and a surface of the duct wall, between the upstream suction port and the downstream suction port. A gap of the air flow path is wider at the downstream side than at the upstream side with respect to the rotational direction of the latent image carrying body.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: September 23, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Kohichi Utsunomiya, Kiyonori Tsuda, Hideo Yoshizawa, Takuzi Yoneda, Emi Kita, Yutaka Takahashi, Yuki Oshikawa
  • Patent number: 8815483
    Abstract: A magenta toner includes a binder resin containing a polyester resin having a dodecenylsuccinic acid structure as a constituent unit, and a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, the magenta toner having an amount of the solid solution of from 2% by mass to 30% by mass based on the total mass of the toner.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: August 26, 2014
    Assignee: Fuji Xerox., Ltd.
    Inventors: Akira Matsumoto, Yusuke Ikeda, Eiji Nakai
  • Patent number: 8808955
    Abstract: A toner includes a coloring agent, a binder resin comprising a crystalline resin having a urethane skeleton and/or urea skeleton, and a releasing agent (a microcrystalline wax). A development agent, a process cartridge, and an image forming apparatus employ the toner to form images on recording media electrophotographically.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: August 19, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Nakayama, Atsushi Yamamoto, Hideyuki Santo, Daiki Yamashita, Suzuka Amemori, Masahide Yamada
  • Patent number: 8765343
    Abstract: An electrostatic latent image developing toner contains a binder resin, a colorant, europium, and bismuth.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: July 1, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuki Takamiya, Eisuke Iwazaki, Satoshi Yoshida, Satoshi Inoue
  • Publication number: 20140169833
    Abstract: First and second developing members are moved to a developing position from a retracted position respectively in the order of a first developing member and a second developing member, and image forming is started by adhering toner to a first photosensitive member and a second photosensitive member in this order, and a period in which the first developing member moves from the retracted position to the developing position is shorter than a period in which the second developing member moves from the retracted position to the developing position.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 19, 2014
    Inventors: Hiroshi Kawamura, Kei Sawanaka
  • Patent number: 8741522
    Abstract: An electrostatic charge image developing toner includes: a polyester resin that has a glass transition temperature of about 45° C. or higher and in which a proportion of repeating units derived from fumaric acid in repeating units derived from acid components is 10 mol % or greater and a proportion of repeating units derived from alkenylsuccinic acid in the repeating units derived from acid components is 10 mol % or greater; and a photopolymerization initiator, wherein a content of the photopolymerization initiator is from about 0.5% by weight to about 10% by weight.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: June 3, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yasuhiro Arima
  • Publication number: 20140147171
    Abstract: Disclosed is an electrostatic ink composition, comprising a single charge director and a charge control agent that counters the build up of negative optical density memory on the intermediate transfer member of a printing apparatus using the electrostatic ink.
    Type: Application
    Filed: July 13, 2011
    Publication date: May 29, 2014
    Inventors: Ilanit Mor, Basile Verdene, Albert Teishev, Roi Liraz, Yaron Grinwald, Nava Klein, Emad Masoud
  • Patent number: 8735036
    Abstract: An electrostatic charge image developing toner includes: toner particles; and an external additive having an average particle diameter of from about 70 nm to about 420 nm, an average circularity of equal to or less than about 0.9, and a standard deviation of the circularity of greater than 0.2.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: May 27, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsuyuki Kitajima, Yutaka Saito, Sakon Takahashi, Michio Take
  • Patent number: 8731442
    Abstract: An image forming apparatus is provided, which is configured to form an image with developer of a plurality of colors on a sheet-type recording medium by a non-magnetic single component developing method. The image forming apparatus includes a first color developing unit which is configured to perform developing of a first color by a jumping developing method, and a second color developing unit which is configured to perform developing of the second color by a contact developing method.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: May 20, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Shuichi Kato, Seiichi Senda, Junichi Hashimoto
  • Patent number: 8693925
    Abstract: A powder container includes a containing portion having an opening and including: an opening/closing member movable between an open position and a closed position, an opening restrained portion on one of the opening/closing member and the containing portion, an opening restraining portion on the other of the opening/closing member and the containing portion at a position corresponding to the opening restrained portion when the opening/closing member is at the closed position, the opening restraining portion restraining movement of the opening/closing member toward the open position by contacting the opening restrained portion, an urged portion on one of the containing portion and the opening/closing member, and an urging portion on the other of the containing portion and the opening/closing member at a position corresponding to the urged portion when the opening/closing member is at the closed position, the urging portion making the opening restraining portion contact the opening restrained portion.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: April 8, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kiyohito Horii, Masaaki Tokunaga, Akihiko Terao
  • Patent number: 8688010
    Abstract: A developing cartridge having a first side plate and a second side plate spaced opposite from the first side plate, a developer carrying member rotatably supported between the side plates, a developer supplying member rotatably supported between the side plates, a input member to which driving force is input rotatably supported by the first side plate, a primary developing gear to which the driving force is transferred provided on the developer carrying member at the first side plate, a secondary developing gear to which the driving force is transferred provided on the developer carrying member at the second side plate, and a supply gear to which the driving force is transferred provided on the developer supplying member at the second side plate, wherein the input member and the supply gear are arranged so that their projections in the direction of the rotation axis of the developer supplying member overlap.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: April 1, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shuichi Kato
  • Patent number: 8685604
    Abstract: A toner including a colorant and a first binder resin is provided. The first binder resin has first and second glass transition points at a temperature Tg1 of ?20 to 20° C. and a temperature Tg2 of 35 to 65° C., respectively, measured by a differential scanning calorimeter at a heating rate of 5° C./min. A ratio h1/h2 of a baseline displacement h1 observed in the first glass transition point to a baseline displacement h2 observed in the second glass transition point is less than 1.0. The first binder resin has a structure in which a first phase is dispersed in a second phase. The first and second phases consist of portions having larger and smaller phase difference values, respectively, than an intermediate value between maximum and minimum phase difference values in a binarized phase image obtained by an atomic force microscope with a tapping mode method.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: April 1, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Moriya, Masahide Yamada, Taichi Nemoto, Yukiko Nakajima, Yoshitaka Yamauchi, Daiki Yamashita, Keiji Makabe, Akiyoshi Sabu, Suzuka Amemori
  • Patent number: 8630573
    Abstract: An image forming method including forming a toner image on a transfer medium with a toner comprising a wax having a polar group, and applying a varnish to the toner image. The wax may be a plant wax having an ester group, a wax having a polar group derived from a fatty acid, an oxidized wax, or a mixture thereof. The varnish may include a surfactant, such as a polyoxyethylene glycol, and may be photocurable.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: January 14, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masato Iio, Tsuyoshi Asami, Kentarou Matsumoto, Shinya Kobayashi, Akio Tsujita, Kathuhiro Shinohara, Tadashi Kasai, Takashi Bisaiji
  • Patent number: 8619329
    Abstract: What is disclosed is a novel system and method for determining an amount of clear toner to be applied to a document image to improve smoothness in an output print rendered using a xerographic device capable of applying clear toner to the image in the image path. Using clear toner to improve smoothness enables a GCR strategy in which more black can be used. This, in turn, decreases the incremental cost for clear toner. The teachings hereof present attractive trade-offs for print shops specializing in color document reproduction and other customers of high-end xerographic devices capable of applying clear toner. Various embodiments are disclosed.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: December 31, 2013
    Assignee: Xerox Corporation
    Inventor: Guo-Yau Lin
  • Patent number: 8603716
    Abstract: An electrostatic image developing carrier includes a ferrite particle and a resin layer that coats the ferrite particle, wherein a magnesium element content of the ferrite particle is from about 3.0% by weight to about 20.0% by weight; wherein a manganese element content of the ferrite particle is from about 0.2% by weight to about 0.8% by weight; and wherein a content of toluene is more than about 100 ppm and not more than about 2,000 ppm.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: December 10, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takeshi Shoji, Akihiro Iizuka, Yosuke Tsurumi, Fusako Kiyono
  • Patent number: 8588654
    Abstract: An image forming apparatus includes a rotatable image bearing member for carrying a latent image; a developing device including a developer carrying member, rotatable about a rotational axis thereof, for carrying a developer and for developing a latent image formed on the bearing member; a rotatable feeding member, provided in the developing device, for feeding the developer; a first driving force receiving member, provided at one axial end portion of the developer carrying member, for receiving a driving force for driving the developer carrying member; a second driving force receiving member, provided at the other axial end portion of the developer carrying member, for receiving a driving force for driving the feeding member; a first drive inputting member for driving the first driving force receiving member; a second drive inputting member for driving the second driving force receiving member; and an abutment member, provided at each of the axial end portions of the developer carrying member, or determining
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: November 19, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masaki Kakitani
  • Patent number: 8532536
    Abstract: A developing cartridge having a first side plate and a second side plate spaced opposite from the first side plate, a developer carrying member rotatably supported between the side plates, a developer supplying member rotatably supported between the side plates, a input member to which driving force is input rotatably supported by the first side plate, a primary developing gear to which the driving force is transferred provided on the developer carrying member at the first side plate, a secondary developing gear to which the driving force is transferred provided on the developer carrying member at the second side plate, and a supply gear to which the driving force is transferred provided on the developer supplying member at the second side plate, wherein the input member and the supply gear are arranged so that their projections in the direction of the rotation axis of the developer supplying member overlap.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: September 10, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shuichi Kato
  • Publication number: 20130209137
    Abstract: A process cartridge detachably mountable to an image forming apparatus includes a rotatable developer carrying member, a rotatable developer feeding member, a rotatable developer stirring member, a developer carrying member gear, a developer feeding member gear, a developer stirring member gear, a transmission member for transmitting a driving force to the developer carrying member, the developer feeding member and the developer stirring member, wherein the transmission member includes a first gear for transmitting the driving force to the developer carrying member gear, a second gear for transmitting the driving force to the developer feeding member gear, and a third gear for transmitting the driving force to the developer stirring member gear, in which the first gear, the second gear and the third gear are integrally molded.
    Type: Application
    Filed: December 21, 2012
    Publication date: August 15, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: CANON KABUSHIKI KAISHA
  • Patent number: 8503892
    Abstract: A developing unit includes: a developer carrier; a toner supplying member having a porous surface layer; a toner storage storing therein toner; a stirring member that is rotated to stir the toner; a toner amount detecting unit that detects an amount of the toner; a toner supplying unit that supplies new toner to the toner storage based on a detection result; and a toner removing member that removes the toner carried in the porous surface layer, wherein the toner removing member is arranged in a separable and contactable manner from and with the porous surface layer, and the developing unit has a stirring mode in which the toner removing member is brought into contact with the porous surface layer, and the toner supplying member is rotated while the stirring member is rotated to stir the toner.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: August 6, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Kohta Sakaya, Tomohiro Kubota, Tetsumaru Fujita, Atsushi Takehara, Naoki Nakatake
  • Patent number: 8494403
    Abstract: A developing device includes an image carrier on which an electrostatic latent image is formed, a developing member facing the image carrier to supply a developing agent to the electrostatic latent image formed on the image carrier, a rotary member facing the outer circumference of the image carrier in a non-contact state to collect toner scattered from the developing member, and a gear train to drive the rotary member. An effect that the developing member is subjected to by the driving of the rotary member is minimized, thereby preventing deterioration of image quality. Also, the scattering of the developing agent is effectively prevented by adjusting the drive rotational velocity of the rotary member.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: July 23, 2013
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventor: Jong Hyun Park
  • Patent number: 8486599
    Abstract: According to an embodiment, provided is a developer, which is used for a full-color image forming apparatus, wherein the developer includes a monochrome toner and a color toner, each including a coloring material, an amorphous polyester resin, a crystalline polyester resin, and an ester wax which includes ester compounds having an alkyl group and also having a carbon number of from 32 to 48, the amorphous polyester resin to be blended in the monochrome toner has a melting point (Tm2) of from 140 to 155° C. and the amorphous polyester resin to be blended in the color toner has a melting point (Tm1) of from 115 to 130° C., and the Tm1 and the Tm2 satisfy the following formula (1): 10(° C.)?Tm2?Tm1?40(° C.).
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: July 16, 2013
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventor: Koichi Kuroyama
  • Patent number: 8475995
    Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: July 2, 2013
    Assignee: Samsung Fine Chemicals Co., Ltd.
    Inventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
  • Patent number: 8467706
    Abstract: A printer apparatus includes the use of at least two HSD stations to develop an electrostatic image generated by a single exposure on a photoreceptor in order to enable high speed, high quality monochrome development. A third standby HSD station can be included for increased reliability or be cycled in and out of development allowing on-the-fly cleaning of HSD wires.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: June 18, 2013
    Assignee: Xerox Corporation
    Inventor: William H. Wayman
  • Patent number: 8433222
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. In particular, the present embodiments pertain to an improved imaging member comprising a single layer in which the single layer further comprises a photoactive material in a polymeric binder. The embodiments are free of photosensitive pigments and traditional electron transporting small molecules.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: April 30, 2013
    Assignee: Xerox Corporation
    Inventors: Richard A. Klenkler, Gregory McGuire, Matthew A. Heuft
  • Patent number: 8428494
    Abstract: A driving device to be used in an image forming apparatus includes an input gear; a partly non-toothed gear having a toothed portion engageable with the input gear and having a non-toothed portion; a holding member capable of placing the partly non-toothed gear in a holding state in which the non-toothed portion opposes the input gear and the partly non-toothed gear is not engaged with the input gear and capable of placing the partly non-toothed gear in a released state in which the holding state is released; a cylindrical member rotatable by receiving a rotational force; and an entering portion which is rotatable together with the partly non-toothed gear and which is capable of entering an inside of the cylindrical member and capable of receiving the rotational force from the cylindrical member by a frictional force between the entering portion and the cylindrical member.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: April 23, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazushi Ino, Tomoo Nagaoka
  • Patent number: 8420285
    Abstract: A coated carrier regenerating method in accordance with the present invention includes the step of: determining an amount of a worn-away coating resin of a used coated carrier. Accordingly, an amount of the coating resin layer to be supplemented, namely an amount of the coating resin with which the coating resin layer is to be supplementarily coated is found based on this amount of the worn-away coating resin, whereby the supplementary coating of the used coated carrier can be carried out with the coating resin in the amount thus determined. This allows regeneration of a coated carrier in which a coating resin has a uniform thickness, that is, a coating resin layer has a thickness which is unchanged from the thickness obtained before use of the coated carrier, without the need of completely removing the coating resin from the used coated carrier.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: April 16, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takeshi Kato
  • Publication number: 20130089359
    Abstract: An electrostatic latent image developing toner has an average sphericity of at least 0.94 but no more than 0.98, the particles for which the accumulated equivalent spherical diameter on a number basis is at least 90% and the sphericity is less than 0.92 account for less than 3% of the entire toner, the proportion of particles having a sphericity of at least 0.90 but less than 0.95 is at least 20% but no more than 40% of the entire toner, and a proportion of particles having a sphericity of at least 0.95 but no more than 1.00 is at least 60% but no more than 80% of the entire toner.
    Type: Application
    Filed: November 5, 2012
    Publication date: April 11, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventor: FUJI XEROX CO., LTD.
  • Patent number: 8394567
    Abstract: There is provided a toner for electrostatic latent image developing, which includes a binder resin; a carbon black-surface treated with an isocyanate compound including a plurality of isocyanate groups which include one or more isocyanate groups that are not bonded to the carbon black; and a release agent having an acid value of about 5 mgKOH/g or higher and/or a hydroxyl value of about 5 mgKOH/g or higher.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: March 12, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Kamiwaki, Akira Matsumoto, Sakon Takahashi
  • Patent number: 8396396
    Abstract: An image forming apparatus includes developing units designed to have an appropriate developer storage capacity in consideration of developer consumption, and improved convenience of use. The image forming apparatus also includes an image carrier, and plural developing units arranged along a rotating direction of the image carrier to supply developers to the image carrier. The plural developing units include a first developing unit having the largest developer storage capacity and a second developing unit having the second largest developer storage capacity after the first developing unit.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: March 12, 2013
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Jong In Kim, Myoung Su Baek, Oh Dug Gwon
  • Patent number: 8389186
    Abstract: A toner set is composed of toners of a plurality of colors that are used in a tandem-type color image forming apparatus. Each of the toners of a plurality of colors includes toner base particles and an external additive. The external additive includes small-diameter silica particles and large-diameter silica particles larger than the small-diameter silica particles. When, of the toners of a plurality of colors, three color toners to be used consecutively for forming the toner image are defined as a first toner, second toner and third toner respectively in order of usage thereof, the average particle diameter of the large-diameter silica particles contained in the second toner is smaller than the average particle diameter of the large-diameter silica particles contained in the first toner and is larger than the average particle diameter of the large-diameter silica particles contained in the third toner.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: March 5, 2013
    Assignee: Kyocera Mita Corporation
    Inventor: Takeo Mizobe
  • Publication number: 20130051858
    Abstract: A mold for producing a resin shaft-end flange for a roller for image forming devices, wherein the shaft-end flange includes a flange portion and a shaft portion projecting axially from the center axis of the flange portion and adapted to be fitted to an end portion of a metal sleeve of the roller. The mold (10) includes a flange-forming cavity (12) and a shaft-forming cavity (16) corresponding to the flange portion and the shaft portion of the shaft-end flange, respectively. The inner surface of the shaft-forming cavity is designed so that the shaft portion of the shaft-end flange has a sectional shape (16TP) with nth order fold-axis symmetry, where “n” represents an integer not less than 2.
    Type: Application
    Filed: March 29, 2011
    Publication date: February 28, 2013
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Yoshihiko Mukaiyama