Including Lubricant Patents (Class 399/346)
  • Patent number: 10712704
    Abstract: An image forming apparatus includes an image carrying unit that carries a toner image on a surface of the image carrying unit along with rotation of the image carrying unit to transfer the toner image onto a target transfer unit, and a supply unit that supplies a larger amount of fatty acid metal salt to the image carrying unit as a rotation speed of the image carrying unit increases.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: July 14, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yasutaka Matsumoto
  • Patent number: 10691058
    Abstract: An image forming apparatus includes a latent image carrier whose rotational speed changes depending on a printing speed of an image onto a sheet, an applicator that applies a lubricant to a surface of the latent image carrier, and a hardware processor that causes a surface of the applicator to move such that a difference between a first moving speed and a second moving speed is within a certain range, the first moving speed being a speed at which the surface of the latent image carrier moves, the second moving speed being a speed at which the surface of the applicator moves.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: June 23, 2020
    Assignee: KONICA MINOLTA INC.
    Inventors: Kunitomo Sasaki, Masayasu Haga, Sayaka Morita, Tsugihito Yoshiyama
  • Patent number: 10642202
    Abstract: An image forming apparatus includes: an image carrier rotatably supported; a lubricant supplier that supplies lubricant to a surface of the image carrier; a blade that levels the lubricant supplied from the lubricant supplier in a film-like form on the surface of the image carrier; and a controller that controls image formation, wherein the controller has a lubricant removal mode to remove the lubricant accumulated on the blade, the lubricant removal mode includes a plurality of displacement modes each of which imparts different displacement to the blade, in each of the displacement modes, one of a displacement amount, a displacement speed, a displacement period, a displacement angle, and a displacement position of the blade is different, and the controller performs switching between the displacement modes dining execution of the lubricant removal mode.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: May 5, 2020
    Assignee: Konica Minolta Inc.
    Inventors: Yuji Kamoda, Shota Sakurai, Hiroyuki Saito, Tatsuya Furuta
  • Patent number: 10514653
    Abstract: An image forming apparatus includes: a lubricant supply section that supplies a lubricant of a lubricant rod extending along an axial direction of an image bearing member onto the image bearing member; and a hardware processor that controls displacement of a sheet conveyance member so as to displace a sheet along a width direction of the sheet. The hardware processor performs control of changing a position in the axial direction of the toner image formed on the image bearing member on the basis of a distribution status of a toner in the axial direction in a toner image formed on the image bearing member, and controls displacement of the sheet conveyance member after a tip end of the sheet in the conveyance direction enters the transfer section so that a sheet position in a width direction of an image transferred onto the sheet is correct in the transfer section.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: December 24, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yoshiteru Kawakami, Yasuo Shiokawa, Takahiro Okubo
  • Patent number: 10317809
    Abstract: An image forming apparatus includes a photoreceptor that includes a conductive substrate, a photosensitive layer, and an inorganic surface layer arranged in that order, the inorganic surface layer containing a group 13 element and oxygen; a charging unit; an electrostatic image-forming unit; a developing unit; a transfer unit; a cleaning unit that performs cleaning by causing the cleaning blade to contact the surface of the photoreceptor; and a supply unit that supplies a fatty acid metal salt to a position where the cleaning blade in the cleaning unit contacts the photoreceptor. When the fatty acid metal salt is supplied, a portion of the surface of the photoreceptor downstream of the supply unit and upstream of the cleaning unit in a rotating direction of the photoreceptor is covered with a metal derived from the fatty acid metal salt at a coverage of about 40% or more.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: June 11, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masaki Hirakata, Hideya Katsuhara, Nobuyuki Torigoe, Yasutaka Matsumoto, Takeshi Iwanaga
  • Patent number: 10274891
    Abstract: A solid lubricant application device includes: a rotating body; a solid lubricant applied to the rotating body; a resilient urging member that causes the solid lubricant to abut toward a circumferential surface of the rotating body; and a guide mechanism that guides movement of the solid lubricant. When a straight line parallel to a direction in which the solid lubricant abuts against the rotating body is referred to as a first straight line, and a straight line parallel to a direction in which the resilient urging member and the solid lubricant are connected is referred to as a second straight line, the guide mechanism guides the movement of the solid lubricant such that an intersecting angle, which is a smaller one of angles formed by the first straight line and the second straight line, decreases as the solid lubricant is applied to the rotating body and accordingly changed in shape.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: April 30, 2019
    Assignee: Konica Minolta, Inc.
    Inventor: Shingo Aoki
  • Patent number: 10185249
    Abstract: A developing device includes a developer container that accommodates an electrostatic image developer including toner containing a toner particle and a zinc stearate particle, a ratio (DT/DS) of a volume-average particle size (DT) of the toner particle to a volume-average particle size (DS) of the zinc stearate particle being about 1.9 or more; a developer carrier that supplies the toner to an image carrier; a supply conveyor that supplies the electrostatic image developer while conveying the electrostatic image developer; a mixing conveyor that conveys the electrostatic image developer while mixing the electrostatic image developer; and a partition disposed between the supply conveyor and the mixing conveyor. The electrostatic image developer is moved from the supply conveyor to the mixing conveyor through a first passage and is moved from the mixing conveyor to the supply conveyor through a second passage.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: January 22, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yasutaka Matsumoto
  • Patent number: 10152004
    Abstract: A cleaning apparatus includes a cleaning member having an abutment member being attached to a tip end portion of a support member. The support member includes a bent portion, an abutment-side support portion, and a fixed-side support portion. The abutment member abuts on a surface of an image carrying member. A point of fixation of the support member fixed to a fixing member is located downstream in a direction of movement relative to a normal at a point of abutment of the abutment member. With an angle of bending ? at the bent portion being set to 90°<?<180°, the abutment-side support portion is curved in a form of a crest toward downstream in the direction of movement whereas the fixed-side support portion is curved in a form of a crest toward upstream in the direction of movement.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: December 11, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Eri Yoshida, Noritoshi Hagimoto
  • Patent number: 10001714
    Abstract: An electrophotographic photosensitive member includes a conductive base; an organic photosensitive layer disposed on the conductive base, the organic photosensitive layer including a layer that constitutes a surface and contains a charge transport material, a binder resin having a viscosity-average molecular weight less than about 50,000, and silica particles in an amount of about 40% by weight or more; and an inorganic protective layer disposed on the organic photosensitive layer.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: June 19, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masaki Hirakata, Takeshi Iwanaga, Nobuyuki Torigoe, Hideya Katsuhara, Yoichi Kigoshi, Takashi Imai, Fumiaki Mera
  • Patent number: 9989885
    Abstract: An image forming apparatus includes: an image carrier; a developing unit which supplies a toner contained in a developer to the image carrier; a lubricant supply unit which supplies a lubricant to the image carrier; a lubricant amount detection unit which detects an amount of the lubricant which is supplied to the image carrier from the lubricant supply unit and is thereafter incorporated into the developing unit from the image carrier; and a control unit which controls the developing unit to discharge the lubricant from the developing unit according to the amount of the lubricant detected by the lubricant amount detection unit.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: June 5, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kazuhiro Saito, Tomohiro Kawasaki, Hiroyuki Saito, Kei Yuasa
  • Patent number: 9971282
    Abstract: A cartridge is detachably mountable to a main assembly of an image forming apparatus. The cartridge includes a rotatable member, a blade member contacted to the rotatable member, and a frame configured to support the blade member and the rotatable member. The cartridge also includes a seal member configured to fill a gap between the frame and the blade member at a longitudinal end portion of the blade member.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: May 15, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuharu Hoshi, Fumito Nonaka
  • Patent number: 9927762
    Abstract: In an imaging device having a photoconductive drum and a lubricant applicator brush, methods and apparatus teach application of the lubricant to the drum at a transfer nip and removing undeveloped toner particles. A first voltage is applied to the drum while the brush receives a voltage that switches more positive and more negative than the first voltage. It attracts to the brush from the drum negatively and positively charged toner. Embodiments contemplate amounts of voltages and frequencies of switching. An elongate rod contacts the brush downstream of the transfer nip to flicker off the toner particles from the brush. The rod can also have voltages applied and switched greater than and lesser than the voltages of the applicator brush to facilitate toner removal. A cleaning blade downstream of the transfer nip scrapes clean a surface of the drum.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: March 27, 2018
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Michael J Dixon, Pramod K Sharma, Alan S Campbell
  • Patent number: 9910398
    Abstract: An electrophotographic image forming apparatus using an organic photoreceptor in which at least a charge generation layer, a charge transport layer, and a protective layer are laminated in order on a conductive support includes at least a unit for supplying a lubricant onto a surface of the organic photoreceptor and a unit for removing toner remaining on the surface of the organic photoreceptor with a cleaning blade, and satisfying the following conditions (1) to (3): (1) the protective layer of the organic photoreceptor contains at least metal oxide fine particles in a cured resin obtained by curing a polymerizable compound; (2) a universal hardness of the surface of the organic photoreceptor is in a range of 220 to 280 N/mm2; and (3) a JIS-A hardness of a portion of the cleaning blade to be abutted on the organic photoreceptor is in a range of 70 to 78°.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 6, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Keiichi Inagaki, Seijiro Takahashi, Hiroshi Nakahara, Hiroshige Kidera
  • Patent number: 9904208
    Abstract: An accommodating device for collecting developer from an image bearing member includes an accommodating container for accommodating the developer from the image bearing member, a feeding member for feeding the developer in a developer feeding direction and provided in the accommodating container, and a wall member for partitioning inside of the accommodating container. The wall member is provided in the accommodating container and extends along a direction crossing the developer feeding direction and inclined toward a downstream side of the feeding member with respect to the developer feeding direction. The wall member is contactable to the developer being fed in the developer feeding direction.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: February 27, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Maeda, Noriyuki Komatsu, Naoki Matsumaru, Ryuta Murakami, Takatoshi Hamada, Hiroaki Nosho
  • Patent number: 9869961
    Abstract: An electrophotographic image forming apparatus using an organic photoreceptor in which at least a charge generation layer, a charge transport layer, and a protective layer are laminated in order on a conductive support includes at least a unit for supplying a lubricant onto a surface of the organic photoreceptor and a unit for removing toner remaining on the surface of the organic photoreceptor with a cleaning blade, and satisfying the following conditions (1) to (3): (1) the protective layer of the organic photoreceptor contains at least metal oxide fine particles in a cured resin obtained by curing a polymerizable compound; (2) a universal hardness of the surface of the organic photoreceptor is in a range of 220 to 280 N/mm2; and (3) a JIS-A hardness of a portion of the cleaning blade to be abutted on the organic photoreceptor is in a range of 70 to 78°.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: January 16, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Keiichi Inagaki, Seijiro Takahashi, Hiroshi Nakahara, Hiroshige Kidera
  • Patent number: 9841718
    Abstract: A lubricant applicator incorporated in a cleaning device disposed in an image forming apparatus having an image bearing member on which an image containing toner is formed, includes: a lubricant supplying unit that supplies lubricant; a brush roller that scrapes off the lubricant to apply the lubricant to a surface of the image bearing member; and a flicker member positioned on an upstream side from the lubricant supplying unit in a rotation direction of the brush roller, the flicker member coming into contact with the brush roller, wherein the flicker member is a plate-shaped member in which an opening is formed, the flicker member having elasticity to be allowed to elastically rock by coming into contact with the brush roller, and the opening is formed in a region with which the brush roller comes into contact.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: December 12, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kunihiro Ogura, Yukio Hosoya, Taiki Amemiya
  • Patent number: 9798288
    Abstract: An image forming apparatus includes an image bearer to bear a toner image, a lubricant supply roller to supply lubricant to a surface of the image bearer, a rotation speed changer to change a rotation speed of the lubricant supply roller, and a controller to control the rotation speed changer to change the rotation speed of the lubricant supply roller to a target speed based on a predetermined condition. The controller is configured to control the rotation speed changer to avoid a predetermined speed range.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: October 24, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Maehata, Kenji Honjoh, Takeshi Shintani, Nobuo Kuwabara, Daisuke Tomita, Yasuhito Kuboshima, Yusuke Ishizuka
  • Patent number: 9753426
    Abstract: An image bearer protective agent is provided. The image bearer protective agent includes a fatty acid metal salt and an inorganic lubricant. The inorganic lubricant includes a first inorganic lubricant having a tap density of from 0.30 to 0.8 g/cm2.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: September 5, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Komito, Hiroshi Nakai, Kohsuke Yamamoto, Hiroshi Mizusawa, Sho Akiyama
  • Patent number: 9588479
    Abstract: An image forming apparatus is provided which includes an image bearer, a charger to charge the image bearer, a latent image forming device to form an electrostatic latent image on the image bearer, a developing device to develop the electrostatic latent image with a toner, a transfer device to transfer the toner image onto a transfer medium, and a cleaning blade to remove residual toner particles remaining on the image bearer. The toner includes a binder resin and a release agent. The release agent has a longest length Lmax in the toner, which is equal to or greater than 1.1 times a maximum Feret diameter Df of the toner. The cleaning blade includes a strip-like elastic body blade having a contact part with the image bearer. The contact part includes a cured product of an ultraviolet curable composition including an acrylate or methacrylate compound having an alicyclic structure.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: March 7, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shohei Gohda, Masanobu Gondoh, Kaori Toyama, Yohta Sakon, Masahiro Ohmori, Yuka Aoyama, Yuta Nakamura, Yoshihiro Moriya, Satoshi Kojima
  • Patent number: 9535344
    Abstract: A photoconductor is used for an image-forming apparatus, and the photoconductor has a surface including irregularities having an arithmetic average roughness of 0.1 ?m or more and 0.5 ?m or less in a cycle length from 867 to 1,654 ?m.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: January 3, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Noboru Toriu, Hideki Nakamura, Tadayoshi Uchida, Hiroki Orii
  • Patent number: 9519256
    Abstract: An image forming apparatus includes a measurement unit configured to measure a density of an image that an image forming unit forms, an acquisition unit configured to acquire an image processing parameter serving as a correction value used to correct the measured density of the image, a generation unit configured to generate a cleaning patch image using the acquired image processing parameter, and a cleaning patch image forming unit configured to form the cleaning patch image generated by the generation unit on an image bearing member, wherein the cleaning patch image is formed during an interval after a first image is formed by the image forming unit on the image bearing member but before a second image having a printing instruction issued subsequent to a printing instruction issued for the first image is formed by the image forming unit on the image bearing member.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: December 13, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichiro Shibuya
  • Patent number: 9501026
    Abstract: An image forming device including a photoreceptor with a protective layer, a contact charger; and a metal cleaning blade, wherein the cleaning blade includes a first region and a second region facing the photoreceptor, the first region is of a predefined roughness, and J>h×(cos ?/sin ?)×d, where ? is an angle between the first region and a tangent plane of the second region, ? is an angle between the first region and a tangent line of the surface of the photoreceptor at a point of contact with the cleaning blade, h is an amount of depletion of the cleaning blade in a direction perpendicular to the surface of the photoreceptor at the point of contact when the surface of the photoreceptor travels a unit of distance, and d is a predicted total travel distance of the surface of the photoreceptor in a defined time period.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: November 22, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Noritoshi Hagimoto, Yoshiki Nakane, Eri Yoshida
  • Patent number: 9395686
    Abstract: A process cartridge removably installable in an image forming apparatus includes a cartridge body including an image bearer; a cleaning unit removably attached to the cartridge body and including a lubricant supply device to lubricate the image bearer; a first contact terminal disposed in one of the cleaning unit and the cartridge body; and a second contact terminal disposed in the other of the cleaning unit and the cartridge body. The second contact terminal is disposed to contact the first contact terminal to establish electrical continuity between the cartridge body and the cleaning unit, and an end of the first contact terminal includes a sliding contact portion to slidingly contact the second contact terminal in attachment and removal of the cleaning unit to and from the cartridge body.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 19, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Shintani, Yasuhito Kuboshima, Yusuke Ishizuka, Kenji Honjoh, Nobuhiro Kuwabara
  • Patent number: 9389562
    Abstract: An image forming apparatus includes: an image carrier; a development unit configured to develop, as a toner image, an electrostatic latent image formed on the image carrier; a transfer unit configured to transfer the toner image to a medium to which a toner image is to be transferred; a cleaning unit configured to recover toner remaining on the image carrier after transferring the toner image; a lubricant supply unit configured to supply lubricant on the image carrier; a charge unit disposed between the development unit and the cleaning unit, along a surface of the image carrier; and a control unit configured to perform a first mode and a second mode, the first mode configured to form the toner image, the second mode configured to allow the charge unit to increase the amount of charge on toner reaching the cleaning unit relative to that in the first mode.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: July 12, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kunitomo Sasaki, Kazuko Fukumoto, Yuji Kamoda, Yasuo Shirodai, Yuya Sato
  • Patent number: 9383715
    Abstract: A lubricant supplying device includes a lubricant supplier contacting an image bearer, a solid lubricant contacting the roller, a detector detecting a lubricant amount, and a controller controlling a supplying of the roller based on a detector detection. The detector outputs to the controller a first signal of a near-end state when the amount reaches a first amount, a second signal of an end state when the amount reaches a second amount smaller than the first amount, and a third signal of an absolute end state when the amount reaches a third amount smaller than the second amount. The controller temporarily stops the supplying when the second signal is output, cancels a roller temporary stopped state even when lubricant replacement is not completed after this state, stops the supplying when the third signal is output, and maintains a roller stopped state until the replacement is completed after this state.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: July 5, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kenji Honjoh, Takeshi Shintani, Nobuo Kuwabara, Yasuhiro Maehata, Yasuhito Kuboshima, Yusuke Ishizuka
  • Patent number: 9360826
    Abstract: An image forming apparatus includes an image bearer; a toner image forming unit to form a toner image on the image bearer; a transfer device to transfer the toner image from the image bearer onto a transfer medium; a cleaning device to remove untransferred toner from the image bearer; and a lubrication device including a solid lubricant, an applicator to apply lubricant scraped off from the solid lubricant to the image bearer while rotating, and an applicator driving device to rotate the applicator; and a controller to control the applicator driving device according to a predetermined variable to change a rotational frequency of the applicator during idle running of the image bearer.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: June 7, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomohiko Saito, Fumihito Itoh, Toshiya Sato, Norio Kudoh, Hiroyuki Uenishi
  • Patent number: 9321254
    Abstract: Article having a first single, discrete atomic, dry layer of a first weakly bonded crystalline material on at least a surface of a substrate. Embodiments of the articles are useful, for example, in automotive under-the-hood parts exposed to chemicals and extreme temperatures.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: April 26, 2016
    Assignee: 3M Innovative Properties Company
    Inventors: Arokiaraj Jesudoss, Ranjith Divigalpitiya, Gary A. Korba, Boon Kiat Lim, Melvin T. Zin
  • Patent number: 9280125
    Abstract: An image forming apparatus includes a first image bearer, a lubricant dispenser to apply lubricant to the first image bearer, and a controller to adjust a spatial interval during image formation between successive recording media on each of which an image is formed, according to a total amount of toner attached to the first image bearer for each of the successive recording media, to apply the lubricant to the first image bearer.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: March 8, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Wakana Itoh, Tadashi Kasai, Takamasa Ozeki, Jun Hitosugi, Emiko Shiraishi, Makoto Yasuda, Kunio Hasegawa, Mutsuki Morinaga, Takatsugu Komori, Hitoshi Yamamoto
  • Patent number: 9223283
    Abstract: An image forming apparatus for forming an image on a rotative image carrier and transferring the image onto an object, including: a cleaning unit removing a residual material from the image carrier; and a lubricant applying unit applying lubricant to a circumferential surface of the image carrier, the lubricant applying unit including: a rotative transporter picking up and retaining lubricant, transporting the lubricant to a lubricant application point, and supplying a portion of the lubricant to the image carrier at the lubricant application point; an ejector causing the transporter to eject a portion of the lubricant retained by the transporter; a collector collecting the portion of the lubricant ejected from the transporter; and a controller controlling ejection of the portion of the lubricant so as to maintain the amount of the lubricant retained by the transporter as no greater than a predetermined upper limit.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: December 29, 2015
    Assignee: Konica Minolta, Inc.
    Inventors: Yohei Ito, Tsugihito Yoshiyama, Yoshiki Nakane, Tomohisa Yoshida, Masanori Kawada
  • Patent number: 9146517
    Abstract: A lubricant supplying device used with a solid lubricant, includes a supplying member to supply lubricant taken from the solid lubricant to an object to be supplied with the lubricant, and a remaining amount detecting section to detect a remaining amount of the solid lubricant becoming below a predetermined value. A detection of the remaining amount of the solid lubricant is executed when an operation to supply the lubricant to the object to be supplied with the lubricant stops.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: September 29, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Honjoh, Takeshi Shintani, Kohsuke Yamamoto, Daisuke Tomita, Norio Kudo
  • Patent number: 9122225
    Abstract: A lubricant applicator includes a lubricant, a supply member contactable against the lubricant to supply the lubricant to a target, and a lubricant gauge to detect whether an amount of lubricant remaining is less than a threshold value. The lubricant gauge includes a rotary member rotatable about a shaft, a pressing member to press and rotate the rotary member as the lubricant is consumed, a contact part of the rotary member pressed by the pressing member, and a detection part of the rotary member opposite to the contact part across the shaft of the rotary member.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: September 1, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Uenishi, Takeshi Shintani, Kenji Honjoh, Shinya Karasawa, Daisuke Tomita, Kohsuke Yamamoto, Norio Kudo
  • Patent number: 9104124
    Abstract: The present invention relates to an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support. The electrophotographic photosensitive member has a surface layer containing a polyarylate resin and acicular inorganic fillers. The acicular inorganic fillers are basic and have a number-average aspect ratio of 5 to 50 and a Mohs hardness of 2 to 6.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: August 11, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Maho Hori, Kimihiro Yoshimura, Yohei Miyauchi, Kazuhisa Shirayama
  • Patent number: 9091998
    Abstract: A printing apparatus includes: a print head; an image carrier; a print controller which controls the print head to execute printing on a recording medium for printing via the image carrier, based on print data; a judgement unit which judges whether a lubricant is to be provided on a surface of the image carrier or not, based on a coverage rate by the print data, wherein the coverage rate is the total number of dots to be printed for an area divided by the total number of dots of the area; and a lubricant controller which controls provision of the lubricant on the surface when the judgement unit judges that the surface is to be provided with the lubricant.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: July 28, 2015
    Assignees: CASIO ELECTRONICS MANUFACTURING CO., LTD., CASIO COMPUTER CO., LTD.
    Inventor: Jun Hashimoto
  • Patent number: 9086666
    Abstract: An image forming apparatus includes an intermediate transfer member configured to rotate an image bearing member by contacting and operating the image bearing member, an image bearing member drive unit configured to drive the image bearing member, a control unit configured to output a torque instruction value to the image bearing member drive unit to control an assist torque generated by the image bearing member drive unit, and a measurement unit configured to measure a maximum speed and a minimum speed of the surface of the image bearing member, wherein the control unit controls the image bearing member drive unit using a new torque instruction value determined based on torque instruction values respectively corresponding to a maximum speed and a minimum speed when controlling the image bearing member drive unit so that the maximum speed and the minimum speed are included in a range.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: July 21, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Junya Takatsu
  • Patent number: 9081347
    Abstract: In an embodiment, provided is a lubricant supplying device that includes: a solid lubricant; a supplying member that supplies lubricant of the solid lubricant to a lubricant supplying target; and a remaining amount detecting unit that detects an amount of the solid lubricant being at a given amount or less. The remaining amount detecting unit is provided on a downstream side in a rubbing direction of the supplying member with respect to the solid lubricant.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 14, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Akira Fujimori, Satoshi Hatori, Naohiro Kumagai, Kaoru Yoshino, Hideyasu Seki, Ryohta Gotoh, Takeshi Shintani, Nobuyuki Taguchi, Hiromichi Ninomiya, Norio Kudo, Kenji Honjoh, Yuta Azeyanagi
  • Patent number: 9069295
    Abstract: Provided is a cleaning unit including a removing member that contacts with a surface of a cleaning target and removes adherent matters on the surface of the cleaning target, a storage section that stores the adherent matters removed by the removing member, and a supply member that has a blade and rotates the blade in the storage section to supply some of the adherent matters stored in the storage section to the surface of the cleaning target.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: June 30, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tatsuhiro Igarashi, Manabu Furuki, Masashi Ikeda, Teppei Yawada
  • Patent number: 9063509
    Abstract: An imaging apparatus includes an imaging member having a surface, a delivery member that is spaced apart from the imaging member, and a power source for generating an electric field between the imaging member surface and the delivery member. A functional material is electrohydrodynamically transferred from the delivery member to the imaging member surface when the electric field is generated.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: June 23, 2015
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Yu Qi, Vladislav Skorokhod, Johann Junginger, Sarah Vella, Nan-Xing Hu
  • Patent number: 9052629
    Abstract: An image forming apparatus forms a color image, and includes an endless intermediate transfer belt which rotates and carries a toner image and plural image forming units for plural colors arranged in tandem along the intermediate transfer belt. Each of the image forming units includes an image carrier which rotates and carries a latent image, a charging device which charges the image carrier, a development device which develops the latent image into a toner image, and a cleaning device which cleans the image carrier after the toner image is transferred to the intermediate transfer belt. The charging device of the extreme upstream image forming unit in the belt direction of rotation is a non-contact charging device not in contact with the image carrier. The extreme downstream image forming unit in the belt direction or rotation includes a lubricant application device which applies a lubricant to the image carrier.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: June 9, 2015
    Assignee: Ricoh Company. Ltd.
    Inventors: Kazuhiko Watanabe, Keiji Okamoto
  • Publication number: 20150139710
    Abstract: A protective layer forming device, including: a powdery image bearer protecting agent formed of a granulated product containing a fatty acid metal salt and an inorganic lubricant; and a roller-shaped protecting agent supplying member configured to supply the powdery image bearer protecting agent to a surface of an image bearer.
    Type: Application
    Filed: November 13, 2014
    Publication date: May 21, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Kunio HASEGAWA, Hiroshi NAKAI, Kenji KOMITO, Tadashi KASAI, Takamasa OZEKI, Jun HITOSUGI, Makoto YASUDA, Emiko SHIRAISHI, Wakana ITOH, Takatsugu KOMORI, Mutsuki MORINAGA, Hitoshi YAMAMOTO
  • Patent number: 9037066
    Abstract: Provided is an image forming apparatus including: an image bearing member on which a toner image is formed electrophotographically; and a lubricant applying section that applies a lubricant to a surface of the image bearing member. The lubricant applying section includes two columnar solid lubricants that contain a larger number of residual gas bubbles at one end than the other end thereof, and are produced by the same production method. The two solid lubricants are placed along an axial direction of the image bearing member such that the respective one and the other ends thereof are opposite to each other.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: May 19, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masakazu Nakamura
  • Publication number: 20150132037
    Abstract: Methods for lubricating an imaging member include applying lubricant-containing capsules to the surface of the imaging member via a non-contact applicator. The capsules are applied upstream of a cleaning blade after image transfer to another substrate, such that the cleaning blade ruptures the capsules, thereby releasing the lubricant contained therein.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 14, 2015
    Applicant: Xerox Corporation
    Inventors: Yu Liu, Johann Junginger, Sarah Vella, Cuong Vong, Naveen Chopra, Nan-Xing Hu
  • Patent number: 9008538
    Abstract: An image forming apparatus includes a lubricant applying member located opposite a contact portion of a cleaning blade with an image bearing member below in the vertical direction, an opposed position of the lubricant applying member opposite the contact portion of the cleaning blade with the image bearing member below in the vertical direction being located upstream of a contact position of the lubricant applying member with a cleaning member in the rotational direction of the lubricant applying member, and a carrying member configured to carry the toner removed from the lubricant applying member, the carrying member being disposed at a position on a tangent to an outer circumference of the lubricant applying member at a contact position with the cleaning member and on a vertical line extending from a contact position of the lubricant applying member with a solid lubricant member.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Makoto Saito
  • Publication number: 20150099217
    Abstract: Disclosed is an electrophotographic photoreceptor including a conductive support, a photosensitive layer on the conductive support and a surface layer on the photosensitive layer. The surface layer includes a cured resin prepared by polymerization of a compound having two or more radically polymerizable functional groups per molecule, the cured resin containing an organic resin fine particle and a metal oxide fine particle, and the organic resin fine particle comprising a resin containing a structural unit derived from at least one of melamine and benzoguanamine, the organic resin fine particle having a number average primary particle size of 0.01 to 3.00 ?m.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 9, 2015
    Inventors: Hokuto HATANO, Kazunori Kurimoto, Seisuke Maeda, Hiroki Takao
  • Patent number: 8995899
    Abstract: A protecting agent-supplying device including: a rotation member configured to rotate in a certain direction; an image bearing member-protecting agent containing a fatty acid metal salt and an inorganic lubricant, and being in the form of a solid, wherein the agent is scraped off by the rotation of the rotation member, supplied to an image bearing member for protection thereof, and disposed to have a surface facing the rotation member, which surface has a width G in a direction along the certain direction, and wherein the position X (a center of the width G) is located upstream in the direction along the certain direction from the position Y (a line of intersection between the surface facing and a line extended from the rotational center of the rotation member perpendicular to the surface facing), and a distance d between these positions satisfies a formula 0<d?G/2.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: March 31, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunio Hasegawa, Hiroshi Nakai, Shinya Tanaka, Kohsuke Yamamoto, Taichi Urayama
  • Patent number: 8989646
    Abstract: A cleaning device includes a rotary member, a sheet member, and a toner conveying member. The rotary member is held in contact with a cylindrical surface of an image carrier above a rotation axis of the image carrier. The sheet member is in contact at a distal end thereof with the cylindrical surface of the image carrier above the rotation axis of the image carrier and upstream of a contact position of the rotary member with the cylindrical surface of the image carrier in a direction of rotation of the image carrier. The toner conveying member is disposed above the sheet member and facing the peripheral surface of the rotary member.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: March 24, 2015
    Assignee: Kyocera Document Solutions Inc.
    Inventors: Masaki Kadota, Shigeki Tsukahara, Koichi Hayashi
  • Patent number: 8989645
    Abstract: An image forming apparatus is disclosed, including an image bearing member and a protective layer forming unit. In an embodiment, the protective layer forming unit includes a protective agent supplying member which rotatably contacts a surface of the image bearing member and an image bearing member protective agent. The image bearing member protective agent includes at least a metal salt of a fatty acid and an inorganic lubricant. The protective agent supplying member includes a core material and a foam layer formed on an outer periphery of the core material and including a plurality of cells. Finally, a drive torque of the image bearing member and a drive torque of the protective agent supplying member satisfy a formula.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 24, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunio Hasegawa, Hiroshi Nakai, Takuya Sekine, Kenji Komito
  • Patent number: 8983356
    Abstract: There is described an image forming apparatus that includes an imaging member having a charge retentive-surface for developing an electrostatic latent image thereon. The imaging member includes a substrate and photoconductive member disposed on the substrate. The image forming apparatus includes a charging unit for applying an electrostatic charge on the imaging member to a predetermined electric potential wherein the charging unit is spaced from the photoconductive member a distance of from about 3 ?m to about 300 ?m. The image forming apparatus includes a delivery member in contact with the surface of the photoconductive member. The delivery member includes an elastomeric matrix impregnated with a liquid lubricant wherein the delivery member applies a layer of liquid lubricant to the surface of the photoconductor wherein in the layer has a thickness of from about 1 nm to about 15 nm during steady state operation.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: March 17, 2015
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Nan-Xing Hu, Sarah J. Vella
  • Patent number: 8977182
    Abstract: Fiber bundle forms loops protruding beyond a surface side of a base member with constant spaces therebetween, in at least one of opposite ends located in a direction perpendicular to a weaving direction (W) of a ribbon brush, a weft extending between neighboring loops passes under a warp, and a weft extending through the loop passes above the warp.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: March 10, 2015
    Assignee: Konica Minolta, Inc.
    Inventors: Yoshiki Nakane, Kuniaki Kashiwakura, Hokuto Hatano, Yohei Ito
  • Publication number: 20150063879
    Abstract: An image forming apparatus, including: a contact-separation mechanism configured to change over from a fully separated position in which an intermediate transfer member is separated from a first and a second image bearing members to a partly contacted position in which the intermediate transfer member is separated from the first image bearing member in contact with the second image bearing member to a fully contacted position in which the intermediate transfer member is in contact with the first and the second image bearing members; and a control portion configured to rotationally drive the first image bearing member when the contact-separation mechanism passes through the fully contacted position in association with an image formation for forming a toner image by only the second image bearing member in the partly contacted position.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 5, 2015
    Inventor: Takao YUASA
  • Patent number: 8971764
    Abstract: The presently disclosed embodiments relate generally to image forming systems comprising imaging apparatus members and toner compositions. More specifically, the present embodiments relate to an improved BCR xerographic system comprising (1) a cleaning blade comprising a material having a certain Share A Hardness; (2) a photoreceptor having a surface with a specified Young's Modulus and; and (3) a toner lubricant additive. The combined system demonstrates a significant increase an overall service life of the system.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: March 3, 2015
    Assignee: Xerox Corporation
    Inventors: Richard A. Klenkler, Gregory McGuire, Sarah J. Vella, Guiqin Song, Yu Liu, Adrien P. Cote