Electrostatic Image Transfer Patents (Class 430/48)
  • Patent number: 9482977
    Abstract: Disclosed is a two-component developer containing toner particles and carrier particles. The number-average particle diameter of the toner particles MDt ranges from 3.5 to 5.0 ?m. The MDt of the toner particles and the volume-average particle diameter of the carrier particles MDc are at a specific ratio, and spherical fine toner particles in the toner particles and fine carrier particles in the carrier particles exist at specific percentages.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: November 1, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Shinya Obara, Satoshi Uchino, Kosuke Nakamura
  • Patent number: 9152088
    Abstract: Provided is a developer replenishing cartridge excellent in accuracy with which an image forming apparatus is replenished with a developer irrespective of a use environment even when the developer is in a consolidated state. The developer replenishing cartridge includes: a developer replenishing container and a developer, being removably mountable to a developer replenishing apparatus; in which: the developer replenishing container includes a pump portion that operates so that a state where the internal pressure of a developer containing portion is lower than the atmospheric pressure and a state where the pressure is higher than the atmospheric pressure alternately repeatedly switch with each other; and the developer contains toner having a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: October 6, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takakuni Kobori, Nozomu Komatsu, Hideki Kaneko, Takeshi Hashimoto, Ichiro Kanno, Yosuke Iwasaki, Hiroyuki Fujikawa
  • Publication number: 20150024309
    Abstract: A support material for printing a support structure with an electrophotography-based additive manufacturing system, the support material including a composition having a charge control agent and a thermoplastic copolymer having aromatic groups, (meth)acrylate-based ester groups, carboxylic acid groups, and anhydride groups, with a high anhydride conversion. The composition is provided in a powder form having a controlled particle size, and the support material is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the support structure in a layer-by-layer manner, and is at least partially soluble in an aqueous solution.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 22, 2015
    Inventor: Trevor I. Martin
  • Patent number: 8934259
    Abstract: A method for fabricating a substrate having transferable chiplets includes forming a photo-sensitive adhesive layer on a process side of a source substrate including active components or on a patterned side of a transparent intermediate substrate. The intermediate substrate is brought into contact with the source substrate to adhere the active components on the process side to the patterned side of the intermediate substrate via the photo-sensitive adhesive layer therebetween. Portions of the source substrate opposite the process side thereof are removed to singulate the active components. Portions of the photo-sensitive adhesive layer are selectively exposed to electromagnetic radiation through the intermediate substrate to alter an adhesive strength thereof. Portions of the photo-sensitive adhesive layer having a weaker adhesive strength are selectively removed to define breakable tethers comprising portions of the adhesive layer having a stronger adhesive strength.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: January 13, 2015
    Assignee: Semprius, Inc.
    Inventors: Christopher Bower, Joseph Carr
  • Patent number: 8927183
    Abstract: A photoreceptor including an electroconductive substrate; a photosensitive layer, which is located overlying the electroconductive substrate and which includes a charge generation material, a charge transport material having no radical polymerizability, a binder resin having no radical polymerizability, and a crosslinked polymer including a unit obtained from a first radically polymerizable monomer having three or more functional groups and no charge transport structure and a unit obtained from a second radically polymerizable monomer having a charge transport structure; and an outermost layer, which is located on the photosensitive layer and which includes a crosslinked polymer including a unit obtained from a third radically polymerizable monomer having three or more functional groups and no charge transport structure and a unit obtained from a fourth radically polymerizable monomer having a charge transport structure. An image forming method and apparatus, and a process cartridge using the photoreceptor.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshiaki Kawasaki, Akihiro Sugino, Mitsuaki Hirose
  • Patent number: 8831488
    Abstract: An image forming apparatus includes a first station including a first photosensitive drum, a second station including a second photosensitive drum, and an intermediate transfer member for receiving the first toner image from the first drum and the second toner image from the second drum sequentially. In addition, a first sensor detects a first index image on the intermediate transfer member, and a second sensor detects a second index image on the second drum. A controller controls a peripheral speed of the second drum, and an executing device executes a test mode using a first test inclined index image and a second test inclined index image. The controller controls image forming conditions for the first and second index images in accordance with outputs of the first and second sensors in the test mode.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: September 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaya Kobayashi, Isao Hayashi, Masaaki Naoi
  • Patent number: 8712299
    Abstract: An image forming apparatus includes: a first image carrier; a first image forming unit that forms an image; an intermediate transfer belt; a primary transfer unit that primarily transfers the image onto the intermediate transfer belt; a secondary transfer unit that secondarily transfers the image transferred further onto a recording medium; a second image carrier that transfers the image onto the recording medium; a second image forming unit that forms an image on the second image carrier; a direct transfer unit that directly transfers the image onto the recording medium; a recording medium carriage belt, and a driving roller that drives the recording medium carriage belt; a speed fluctuation detecting unit; and a drive control unit that controls driving of the driving roller so as to reduce the cyclic speed fluctuation of the carriage belt based on a detection result of the speed fluctuation detecting unit.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: April 29, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Narumi Sugita, Toshiyuki Uchida, Yohei Miura, Keisuke Sugiyama
  • Patent number: 8669030
    Abstract: A photoreceptor including an electroconductive substrate; a photosensitive layer which is located overlying the electroconductive substrate and which is not radically crosslinked; and an outermost layer which is located overlying the photosensitive layer and which includes a radically crosslinked material, wherein the radically crosslinked material includes a unit having a specific formula. An image forming method, an image forming apparatus, and a process cartridge, which use the photoreceptor.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: March 11, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Yukio Fujiwara, Tetsuro Suzuki, Kazukiyo Nagai, Hiroshi Tamura, Hiroshi Ikuno, Hidetoshi Kami
  • Patent number: 8530122
    Abstract: A method for forming an image at least comprising steps of forming an electrostatic latent image by exposing an electrophotographic photoreceptor, forming a foil transferring face by supplying a toner onto the electrophotographic photoreceptor having the electrostatic latent image, transferring the foil transferring face formed on the electrophotographic photoreceptor to a base substance, fixing the foil transferring face transferred on the base substance, supplying a transfer foil to the base substance fixed with the foil transferring face, adhering the transfer foil onto the foil transferring face by heating under a condition of contacting the transfer foil with the foil transferring face; and removing the transfer foil from the base substance while leaving the foil adhered onto the foil transferring face, wherein the toner comprises a binder resin having a softening temperature in the range of from not less than 105° C. to not more than 140° C.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: September 10, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yasuko Uchino, Tatsuya Nagase, Asao Matsushima, Aya Shirai, Ryuichi Hiramoto, Michiyo Fujita
  • Patent number: 8512926
    Abstract: The invention provides an electrophotographic toner having a crystalline polyester resin; a non-crystalline polyester resin; a colorant; and a releasing agent. A resin (i), that is included in a toluene-soluble component of the toner and having a molecular weight of 30,000 to 100,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value A. A resin (ii), that is included in a toluene-soluble component of the toner and having a molecular weight of 8,000 to 12,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value B. A resin (iii), that is included in a toluene-insoluble component of the toner, has an acid value C. The acid values A, B, and C satisfy the inequation of B>A>C. The invention further provides an electrophotographic developer using the toner, a toner cartridge storing the toner, and an image forming method using the developer.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: August 20, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Daimon, Yutaka Sugizaki, Susumu Yoshino, Hiroshi Nakazawa
  • Publication number: 20130183613
    Abstract: There is provided a photoconductive member comprising a conductive support and disposed thereon a charge generating layer. The charge generating layer comprises a first polymer binder and a flaventhrone component having blue wavelength photosensitivity of the following formula: wherein each of R1, R2, R3, R4, R5 and R6, are the same or different and are independently selected from the group comprising a hydrogen, alkyl, aryl and halogen. A charge transport layer is disposed on the conductive support and comprises tri-p-toylamine and 1,-1-bis(N,N-ditoyl-4-aminophenyl)cyclohexane in a second polymer binder.
    Type: Application
    Filed: January 16, 2012
    Publication date: July 18, 2013
    Applicant: XEROX CORPORATION
    Inventors: Cuong Vong, Jennifer A. Coggan, Gregory M. McGuire
  • Patent number: 8426091
    Abstract: To solve a thin image density and sweeping occurring when a toner carrying member having a small diameter is used, provided is an image-forming method including: a charging step; an electrostatic latent image-forming step; a developing step; a transferring step; and a fixing step, in which a magnetic toner to be used in the method has a specific weight average particle diameter (D4); the magnetic toner has a specific intensity of magnetization in a specific magnetic field; and a surface free energy of a surface of the magnetic toner and a surface free energy of a surface of a toner carrying member to be used in the method satisfy specific relationships.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: April 23, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Michihisa Magome, Tadashi Dojo, Eriko Yanase, Takashi Matsui, Tomohisa Sano, Shuichi Hiroko
  • Patent number: 8329371
    Abstract: A non-magnetic toner, including a binder resin; a wax present dispersing in the toner in the shape of a particle; and a colorant, wherein the wax having a particle diameter not less than 2.0 ?m and less than 3.0 ?m is not less than 20% and less than 40% by number based on total number thereof; the wax has a mode value not less than 1.5 ?m and less than 2.0 ?m in a frequency distribution of 0.1 ?m width; and the following relationship is satisfied: 45<XZ/Y<62 wherein X represents a softening point (° C.) of the toner; Y represents a volume-average particle diameter (?m) of the toner; and Z represents a total parts by weight of the wax included in 100 parts by weight of the toner.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: December 11, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Mikuriya, Hideaki Yasunaga, Hiroaki Katoh, Kazuoki Fuwa, Masayuki Hagi, Masahide Inoue
  • Patent number: 8190063
    Abstract: A pattern forming apparatus includes a depressed plate holding patterns by developers, a charging device for charging the depressed plate, a developing device for developing a red pattern, a developing device for developing a green pattern, a developing device for developing a blue pattern, and a stage for holding the charging device and the developing devices and moving them relative to the depressed plate. The charging device, the red developing device, the green developing device and the blue developing device pass along the depressed plate sequentially to perform the charging process, the red developing process, the green developing process and the blue developing process simultaneously.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: May 29, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koichi Ishii, Masahiro Hosoya
  • Patent number: 8173336
    Abstract: The purpose of the present invention is to provide a method for transferring a pattern of a circuit pattern precursor formed of electroconductive particles containing no resin component onto an objective substrate with high transfer efficiency while retaining a pattern shape. A method of transferring the circuit pattern precursor formed from an conductive particle dispersed solution on a dielectric thin film body includes the steps of: temporarily removing a liquid film remaining around the circuit pattern precursor right after a development step; subsequently re-electrifying the electroconductive particle pattern by supplying a solvent again to the circuit pattern precursor; and then electrostatically transferring the pattern onto the objective substrate through electrophoresis in the solvent.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: May 8, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Patent number: 8142834
    Abstract: A method of and apparatus (2) for locating and detecting a fingerprint deposited on a surface (10), the method comprising setting up an electric field such that a differential charge density is produced coincident with the location of a fingerprint deposited on the surface. By deploying a conductive powder or other detection element selectively attractable to the surface (10) coincident with the differential charge density in the region of the fingerprint deposit a fingerprint deposited on the surface (10) is located and detected.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: March 27, 2012
    Assignee: Northamptonshire Police Authority
    Inventor: John Bond
  • Patent number: 8143603
    Abstract: An electrostatic latent image measuring device includes a charged particle optical system which irradiates an electron beam and charges a photoconductor sample, an exposure optical system which forms an electrostatic latent image on a surface of the photoconductor sample, and a scanning unit which scans the surface of the photoconductor sample by the electron beam, a distribution of the electrostatic latent image on the surface of the sample being measured by a signal detected by the scanning.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: March 27, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Suhara, Nobuaki Kubo
  • Publication number: 20120040281
    Abstract: A transfer printing method including applying a curable sublimation toner having at least one curable component and at least one sublimation colorant in a desired pattern onto a transfer substrate to form an image on the transfer substrate at a first temperature which is below the sublimation temperature of the sublimation colorant; wherein the curable sublimation toner is a conventional toner or a chemical toner; and wherein the curable sublimation toner includes at least one curable amorphous resin and optionally, a crystalline resin; curing the image on the transfer substrate; and optionally, bringing the transfer substrate into contact with a final image-receiving substrate, optionally applying pressure, and heating to a second temperature which is sufficient to cause the sublimation colorant to sublime and form a permanent image on the final image-receiving substrate.
    Type: Application
    Filed: August 16, 2010
    Publication date: February 16, 2012
    Applicant: XEROX CORPORATION
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Marko Saban
  • Publication number: 20120028175
    Abstract: A method for forming an image at least comprising steps of forming an electrostatic latent image by exposing an electrophotographic photoreceptor, forming a foil transferring face by supplying a toner onto the electrophotographic photoreceptor having the electrostatic latent image, transferring the foil transferring face formed on the electrophotographic photoreceptor to a base substance, fixing the foil transferring face transferred on the base substance, supplying a transfer foil to the base substance fixed with the foil transferring face, adhering the transfer foil onto the foil transferring face by heating under a condition of contacting the transfer foil with the foil transferring face; and removing the transfer foil from the base substance while leaving the foil adhered onto the foil transferring face, wherein the toner comprises a binder resin having a softening temperature in the range of from not less than 105° C. to not more than 140° C.
    Type: Application
    Filed: July 18, 2011
    Publication date: February 2, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yasuko UCHINO, Tatsuya NAGASE, Asao MATSUSHIMA, Aya SHIRAI, Ryuichi HIRAMOTO, Michiyo FUJITA
  • Patent number: 8105743
    Abstract: The present invention provides an organic silicone fine particle for latent electrostatic image developing toners, wherein the organic silicone fine particle has a volume average particle diameter of 0.05 ?m to 6.0 ?m which is obtained by measurement based on Coulter principle, and has a hemispherical polysiloxane cross-linked structure. By mixing an appropriate amount of an organic silicone resin particle formed in a deformed shape (a hemispherical shape) in a toner or developer, the present invention prevents movement of the organic silicone resin particle from surface functional sites, the movement caused by a phenomenon such as detachment thereof from a toner surface or rolling movement on the toner surface, by the effect of its shape, and makes it possible to effectively achieve the expected function.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: January 31, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Ishii, Ryota Inoue, Yoshihiro Moriya, Shingo Sakashita
  • Patent number: 8097387
    Abstract: Described herein are photoreceptor devices that include aligned domains of charge transport materials that have a pi-pi orbital overlap.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: January 17, 2012
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Kathy L. De Jong
  • Patent number: 8097388
    Abstract: The presently disclosed embodiments are directed to an improved low wear overcoat for an imaging member having a substrate, a charge transport layer, and an overcoat positioned on the charge transport layer, and a process for preparing the same including combining a binder, a hole transport molecule, a melamine formaldehyde crosslinking agent and an acid catalyst dissolved in an alcohol solvent to form an overcoat solution, and subsequently providing the overcoat solution onto the charge transport layer to form an overcoat layer.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: January 17, 2012
    Assignee: Xerox Corporation
    Inventors: Matthew A. Heuft, Nan-Xing Hu, Jennifer A. Coggan, Vladislav Skorokhod, Yvan Gagnon, Sarah Kavassalis
  • Patent number: 8067136
    Abstract: To provide: a charge control agent having negative chargeability, which contributes to environmental conservation and the like to an increased degree, has high performance (high charge amount, quick rise-up of charge, excellent stability with time, and high environmental stability), and has improved dispersibility; a toner for developing an electrostatic charge image containing the charge control agent; and an image forming method and an image forming apparatus each using the toner for developing an electrostatic charge image. A charge control agent for controlling a charged state of powder, characterized by including one or more units each represented by the following chemical formula (1) in a molecule.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: November 29, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuya Yano, Takashi Kenmoku, Tatsuki Fukui, Ako Kusakari, Chieko Mihara
  • Patent number: 8039182
    Abstract: An object is to improve the adhesion strength between a circuit pattern and its substrate without increasing the resistance value of the circuit pattern in preparation of a circuit pattern holding substrate. A circuit pattern formation device 100 forms, after forming a precursor circuit-pattern 12 in the surface of a dielectric thin film body 4, a circuit pattern 14 onto a target substrate 23 from the dielectric thin film body. After forming an electrostatic latent image 2 in the upper surface of the dielectric thin film body, the electrostatic latent image is exposed using an exposure unit 3 to prepare a pattern. A development apparatus 7 supplies a conductive particle dispersion solution 6 to this pattern to form a precursor circuit-pattern. By energizing the circuit pattern holding substrate 8, in which an adhesive layer 22 is formed, the precursor circuit-pattern is temporarily transferred to the circuit pattern holding substrate.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: October 18, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Patent number: 8029901
    Abstract: A polyaryl ether intermediate transfer media, such as a belt, and a multi layered intermediate transfer media, that includes a supporting substrate, like a polyimide and deposited on the substrate a polyaryl ether.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: October 4, 2011
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8017290
    Abstract: Objects of the present invention are to provide an image forming method and image forming apparatus which can secure stable toner transferability, prevent reverse transfer of the toner back to a latent image bearing member, have excellent fixing ability and produce high-quality images. The image forming method includes a one-component developing step with a toner and transferring step with an intermediate transfer member, wherein the developing step uses a developing roller having a diameter of 8 mm to 15 mm, and the toner has an adherence Fh (nN) of the toner to a flat surface satisfying the relation represented by the formula (1) and adherence Fr (mN) among the toner particles satisfying the relation represented by the formula (2): 15?Fh?50??(1) 100?Fr?400??(2).
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: September 13, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Minoru Nakamura, Akira Izutani
  • Patent number: 7993819
    Abstract: Electrowetting display devices and fabrication methods thereof are presented. The electrowetting display device includes a first substrate and a second substrate with a polar fluid layer and a non-polar fluid layer insolvable to each other and interposed between the first and second substrates. A first transparent electrode is disposed on the first substrate. A second electrode is disposed on the second substrate. A dielectric layer is disposed on the second electrode. A hydrophilic partition wall structure is directly disposed on the dielectric layer defining a plurality of pixel regions. A layer of low surface energy material is disposed on the dielectric layer within each of the pixel region.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: August 9, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Kuo-Lung Lo, Chih-Chun Hsiao
  • Patent number: 7982940
    Abstract: The present invention provides particles for display media constituting the display media used for an information display panel, in which the display media are sealed between two substrates, at least one of two substrates being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information, comprising: the particles having a substantially spherical shape, which are made by polymerizing raw materials including monomers, which include (acrylic or methacrylic) resin-hydrocarbon resin copolymer in the particles, in which a part of or all of the monomers are a multifunctional monomer having a plurality of polymerization reactive groups in one molecule, and which have minute irregularities on their surface evenly. By such a construction, the particles for display media can obtain irregularities firmly fixed on their surface. Poor display can be solved by using the same.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: July 19, 2011
    Assignee: Bridgestone Corporation
    Inventors: Kazuya Murata, Takao Ohuchi, Hajime Kitano
  • Patent number: 7979005
    Abstract: An electrically conductive pattern forming apparatus has process disposition which reduces contamination of a pattern or inside of the apparatus due to backflow and leakage of a liquid material such as a developing agent or a cleaning liquid. A developing device and a cleaning device in the electrically conductive pattern forming apparatus using an electrophotographic method are disposed in a lower region about the center of a photoreceptor, a solvent removing process is disposed in a region in which the photoreceptor rotates upward, and a transfer liquid applying process and an electrostatic transfer process are disposed above the center of the photoreceptor and in a region in which the photoreceptor rotates downward.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: July 12, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Publication number: 20110097655
    Abstract: Provided is an image-forming method, the method including: forming an electrostatic image on an electrostatic image bearing member which has been charged; developing the electrostatic image to form a toner image; transferring the toner image on the electrostatic image bearing member with or without mediating an intermediate transferring member onto a transfer material; and fixing the toner image on the transfer material, in which: the electrostatic image hearing member is a photosensitive member obtained by sequentially laminating a photoconductive layer and a surface layer formed of hydrogenated amorphous silicon carbide, and a sum of an atomic density of silicon atoms and an atomic density of carbon atoms in the surface layer of the photosensitive member is 6.60×1022 atoms/cm3 or more; and the toner has a binder resin and magnetic iron oxide particles, and the magnetic iron oxide particles contain Fe(2+) at a content of 20.0 mass % or more and 25.0 mass % or lees.
    Type: Application
    Filed: July 24, 2009
    Publication date: April 28, 2011
    Applicant: Canon Kabushiki Kaisha
    Inventors: Tooru Takahashi, Katsuhisa Yamazaki, Syuhei Moribe, Daisuke Yoshiba, Masami Fujimoto
  • Publication number: 20110091245
    Abstract: An image forming method including electrostatic image forming step, developing step, transferring step, fixing step and oil application step for applying an oil to a fixing member, wherein the toner includes a binder resin, a colorant and a wax, and the relationship (A2/A1)×100<200 is satisfied, wherein A1 represents the area of the oil dropped on a pellet of the toner measured 30 seconds after dropping the oil, and A2 represents the area of the dropped oil measured 24 hours after dropping the oil. Alternatively, the relationships (X1?X2)<0.5 atomic percent, X1>1.0 atomic percent, and X2>1.0 atomic percent, are satisfied, wherein X1 and X2 represent amounts of Si atoms of the silicone oil measured by subjecting the toner image to X-ray photoelectron spectroscopy at times 5 minutes and 24 hours, respectively, after fixing the toner image.
    Type: Application
    Filed: December 28, 2010
    Publication date: April 21, 2011
    Inventors: Yasutada SHITARA, Minoru Masuda, Yasuaki Iwamoto, Hyo Shu
  • Patent number: 7919221
    Abstract: An electrophotographic printing toner including a colorant and a resin, wherein the colorant includes a dye having at least one reactive group selected from the group consisting of SO2CnH2nOSO3H, NHCOCnH2nOSO3H, NHSO2CnH2nOSO3H, COCnH2nOSO3H and SO2CHCH2, wherein n represents an integer of from 1 to 4.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: April 5, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuyoshi Asami, Aiko Yamazaki
  • Publication number: 20110070535
    Abstract: A toner for electrostatic latent image development is disclosed comprising colored particles containing a binder resin and a colorant and external-additive particles attached to the surfaces of the colored particles, wherein the external-additive particles comprise resin particles covered with an inorganic layer, and the resin particles are bound to the inorganic layer by a siloxane bond. A preparation method of the toner is also disclosed.
    Type: Application
    Filed: September 16, 2010
    Publication date: March 24, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yukio HOSOYA, Mikio KOUYAMA, Kenji HAYASHI, Hiroaki OBATA, Koji SHIBATA
  • Patent number: 7910273
    Abstract: An electrophotographic image forming method is disclosed. In the method electrostatic latent image is developed by a non-magnetic single-component developing system, in which a non-magnetic single-component developer is conveyed by a developer carrying member, the developer carrying member is contacted with a developer layer regulation member for regulating an amount of the developer at the surface of the developer carrying member, and a binder resin of the developer comprises a vinyl polymer having an acid value of from about 5 to about 30 mgKOH/g and a ratio of hydroxyl group value/acid values from about 0.3 to about 0.8.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: March 22, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Nakamura, Masahiro Anno, Kaori Soeda, Tomoko Mine, Kenichi Onaka, Eiichi Yoshida
  • Publication number: 20110065033
    Abstract: A toner including a binder resin, a coloring agent, a releasing agent, and an additive, the releasing agent having a loss on heat of from 0.5 to 2.0% after being left at 165° C. for 10 minutes, the ratio (P2850/P828) of an absorption strength of a peak at 2,850 cm?1 ascribed to the releasing agent to an absorption strength of a peak at 828 cm31 1 ascribed to the binder resin ranging from 0.03 to 0.25 wherein the ratio is measured according to Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR), and an amount of heat of melting ascribable to the releasing agent according to differential scanning calorimetry (DSC) ranging from 2 to 25 mj/mg.
    Type: Application
    Filed: September 14, 2010
    Publication date: March 17, 2011
    Inventors: Osamu UCHINOKURA, Fumihiro Sasaki, Satoshi Kojima, Daisuke Inoue
  • Publication number: 20110065032
    Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; a charge generation layer overlying the substrate; a first charge transport layer mostly formed of a molecular dispersion film in which a binder resin comprises a low-molecular-weight charge transport material, overlying the charge generation layer; and a second charge transport layer formed of a crosslinked film obtained by irradiating a composition obtained by mixing a radical polymerizable charge transport compound, a tri- or more functional radical polymerizable monomer, and a photopolymerization initiator with ultraviolet radiation to conduct a radical curing reaction, overlying the first charge transport layer, wherein the crosslinked film comprises at least one of the specific 2,5-diaryl-1,3,4-oxadiazole derivatives.
    Type: Application
    Filed: September 14, 2010
    Publication date: March 17, 2011
    Applicant: RICOH COMPANY , LTD.
    Inventors: Kazukiyo NAGAI, Li Hongguo, Tetsuro Suzuki
  • Publication number: 20110059392
    Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer overlying the conductive substrate. The photosensitive layer comprises a phthalimide isoindole derivative having a specific chemical formula.
    Type: Application
    Filed: September 7, 2010
    Publication date: March 10, 2011
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomoyuki SHIMADA, Ryota Arai
  • Publication number: 20110053063
    Abstract: A toner is provided including a core particle comprising a binder resin, a colorant, and a release agent, and a shell layer comprising particles of a vinyl resin. The vinyl resin comprises 80% by weight or more of a unit of an aromatic compound having a vinyl-polymerizable functional group. A method of manufacturing the above toner is also provided, including steps of dissolving or dispersing the binder resin, the colorant, and the release agent in an organic solvent to prepare an oily liquid, dispersing the oily liquid in an aqueous medium to prepare the core particles, and adhering particles of a vinyl resin to the surfaces of the core particles to form shell layers.
    Type: Application
    Filed: August 11, 2010
    Publication date: March 3, 2011
    Inventors: Takuya KADOTA, Yoshihiro MIKURIYA, Tsuyoshi NOZAKI, Atsushi YAMAMOTO, Yoshimichi ISHIKAWA, Tomohiro FUKAO, Tomoharu MIKI
  • Patent number: 7892717
    Abstract: The invention provides a toner for electrostatic image development having at least a binder resin and a colorant and having an existence ratio of an IA Group element, from which hydrogen is excluded, measured by XPS (X-ray Photoelectron Spectroscopy) in a range of about 0.03 to 1.0 atom % and a total of existence ratios of an IIA Group element, an IIIB Group element and an IVB Group element, from which carbon is excluded, measured by XPS in a range of about 0.05 to 2.0 atom %. The invention further provides an electrostatic image developer having at least a carrier and the toner, and an image forming method including at least developing an electrostatic latent image with a developer containing at least the toner to form a toner image.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: February 22, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shuji Sato, Hiroshi Nakazawa, Masanobu Ninomiya, Takeshi Shoji, Eiji Kawakami, Atsushi Sugawara, Shinya Nakashima
  • Patent number: 7835028
    Abstract: An image forming apparatus includes an image holding member, a toner image forming unit, a color forming information applying unit, a transfer unit, a fixing unit and a color forming unit, the color forming information applying unit exposing a toner image formed on a surface of the image holding member from a back surface side of the image holding member, light transmitted through the image holding member applying color forming information to the toner image.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: November 16, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Isao Ito
  • Patent number: 7829250
    Abstract: In accordance with the invention, there are xerographic photoreceptors, image forming apparatus, and methods of forming an image on image. The xerographic photoreceptor can include a substrate and a conductive ground plane having an optical transparency disposed over the substrate, the conductive ground plane including a carbon nanotube layer, such that machine cycling of the xerographic photoreceptor can produce less than approximately a 10% change in the optical transparency of the conductive ground plane after about 100,000 or more machine cycles. The xerographic photoreceptor can also include a photosensitive layer disposed over the conductive ground plane, wherein the photosensitive layer can include a charge generator material and a charge transport material.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: November 9, 2010
    Assignee: Xerox Corporation
    Inventors: Kock-Yee Law, John S. Facci, Edward F. Grabowski
  • Publication number: 20100159373
    Abstract: The present invention provides a method producing printed electronic circuits using electrophotography.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 24, 2010
    Inventors: Thomas N. Tombs, Donald S. Rimai
  • Patent number: 7673562
    Abstract: A structure and method of using a reusable master printing plate is described. In one embodiment, the method uses an electric field to control a series of microvalves. The microvalves control a fluid flow that raises or lowers selected regions on a flexible printing surface to create a desired relief pattern. After creating the relief pattern, the pattern is fixed and used for printing. After completion of printing, the relief pattern is removed from the master printing plate and the printing plate may be reused by applying a new pattern.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: March 9, 2010
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Ashish Pattekar, Eric Peeters, Gregory B. Anderson
  • Publication number: 20100021834
    Abstract: There is disclosed a fuser member comprising a substrate; and an outer layer thereover comprising (a) a polymer and (b) an organometallic species, wherein said polymer and said organometallic species forms an interpenetrating network upon curing; and wherein the outer layer comprises an increased number of uniform organometallic binding sites, as compared to an outer layer devoid of the interpenetrating network. An image forming apparatus comprising the disclosed fuser member is also disclosed. Moreover, a method of forming a polymer system suitable for use in color fusing applications is disclosed.
    Type: Application
    Filed: July 22, 2008
    Publication date: January 28, 2010
    Applicant: XEROX CORPORATION
    Inventors: Santokh Badesha, David J. Gervasi
  • Publication number: 20090258306
    Abstract: Image noise is reduced in halftone imaging processes by placing clear toner particles around the colored toner particles. The clear toner particles must be placed around the colored toner particles prior to transferring the developed image from an imaging member to a receiving member or substrate. The clear toner particles force the colored toner particles to remain in their deposited location during transfer. The result is an image with less mottle and graininess.
    Type: Application
    Filed: April 11, 2008
    Publication date: October 15, 2009
    Applicant: XEROX CORPORATION
    Inventor: Chu-heng Liu
  • Patent number: 7600868
    Abstract: The present invention provides a recording paper comprising pulp fibers and filler as main components and containing at least a cationic substance and a water-soluble polymer in a surface of the recording paper, wherein conductivity of water is not less than 0.002 S/m as measured at 1 second after immersing a piece of the recording paper with an area of 0.05 m2 in 40 ml of pure water.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: October 13, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Chizuru Koga, Kiyoshi Hosoi, Takashi Ogino, Tsukasa Matsuda
  • Publication number: 20090214965
    Abstract: An electrophotographic toner includes a binder resin, a colorant, and a releasing agent, wherein the electrophotographic toner has a complex viscosity (?) of 4e2 Pa·s to 8e3 Pa·s at a temperature range of 120 to 160° C. and an angular velocity range of 1.6 to 10 rad/s, a rate of change of the complex viscosity of 165 to 185 Pa·s/° C. at 1.6 rad/s, and 70 to 80 Pa·s/° C. at 10 rad/s within the temperature range, a stress relaxation of 1.0 e3 to 4.5 e4 Pa at a relaxation time of 0.05 to 0.3 seconds under a temperature range of 120 to 160° C., and a rate of change of the stress relaxation (?G/?T) of 785 to 1000 Pa/° C. at 0.05 seconds and 190 to 215 Pa/° C. at 0.3 seconds within the temperature range above.
    Type: Application
    Filed: September 29, 2008
    Publication date: August 27, 2009
    Inventors: Jae-hyeuk Jeong, Duck-hee Lee, Deuck-woo Jang, Jung-ik Choi, Soon-cheol Jeong, Hae-ree Joo
  • Publication number: 20090214966
    Abstract: A toner including toner particles; and external additives including a fatty acid metal salt having an average primary particle diameter of from 0.5 to 1.5 ?m; a positively chargeable particulate inorganic material; and a negatively chargeable particulate inorganic material. An image forming apparatus including a photoreceptor bearing an electrostatic image, and a center feed developing device configured to develop the electrostatic image with a developer including the toner to form a toner image, and a transfer device configured to transfer the toner image onto a receiving material preferably fed at a speed of from 500 to 1700 mm/s. An image forming method including forming an electrostatic image, developing the electrostatic image with the center feed developing device using the toner to form a toner image, and transferring the toner image onto a receiving material preferably fed at a speed of from 500 to 1700 mm/s.
    Type: Application
    Filed: February 9, 2009
    Publication date: August 27, 2009
    Inventor: Hiroyuki KISHIDA
  • Publication number: 20090202927
    Abstract: To provide: a charge control agent having negative chargeability, which contributes to environmental conservation and the like to an increased degree, has high performance (high charge amount, quick rise-up of charge, excellent stability with time, and high environmental stability), and has improved dispersibility; a toner for developing an electrostatic charge image containing the charge control agent; and an image forming method and an image forming apparatus each using the toner for developing an electrostatic charge image. A charge control agent for controlling a charged state of powder, characterized by including one or more units each represented by the following chemical formula (1) in a molecule.
    Type: Application
    Filed: June 9, 2005
    Publication date: August 13, 2009
    Applicant: Canon Kabushiki Kaisha
    Inventors: Tetsuya Yano, Takashi Kenmoku, Tatsuki Fukui, Ako Kusakari, Chieko Mihara
  • Publication number: 20090197190
    Abstract: An object of the present invention is to suppress the adhesion of a carrier to an image bearing member and the generation of a flaw in the surface layer of the image bearing member, and to improve the dot reproducibility of an electrostatic latent image, and soon. The object is achieved by a two-component developer containing a magnetic carrier, which contains resin-containing magnetic particles, in which the packed bulk density ?1 is 0.80 to 2.40 and ?1/?2 (?2 represents true density) is 0.20 to 0.42 of the porous magnetic core particles, and a specific resistance of the porous magnetic core particles, an average breaking strength of the magnetic carrier and a toner surface tension constant in a 45-vol % aqueous solution of methanol measured by a capillary suction time method fall into the specific range, respectively.
    Type: Application
    Filed: May 15, 2008
    Publication date: August 6, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kunihiko Nakamura, Hiroyuki Fujikawa, Nozomu Komatsu, Yoshinobu Baba, Takayuki Itakura