Patents Examined by Thorl Chea
  • Polyester resin and toner including same
    Patent number: 8883386
    Abstract: Disclosed herein is a toner for use in an electronic photograph-duplicating process or in an electrostatic printing process, and a polyester resin included in the toner as a binder. The polyester resin comprises lactic acids (D or L-lactic acids) or lactides (D or L-lactides) which are derivative compounds thereof, and dianhydrohexitols which are bio-derived sugar derivatives.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: November 11, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Young Man Yoo, Kye Yune Lee, Tae Woong Lee, Jong Wook Shin
  • Multilayer electrophotographic photoconductor and image-forming apparatus
    Patent number: 8877411
    Abstract: An electrophotographic photoconductor includes an electrically conductive base and a photosensitive layer disposed on the electrically conductive base. The photosensitive layer has a structure 1) in which a charge-generation layer including at least a charge-generating material and a charge-transport layer including at least a charge-transporting material and a binder resin are stacked in that order, or a structure 2) in which at least the charge-generating material, the charge-transporting material, and the binder resin are included in the same layer, and the binder resin is a terpolymer polycarbonate resin represented by general formula (I) below.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: November 4, 2014
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Azuma Jun, Maruo Keiji, Hamasaki Kazunari
  • Particles and method for producing the same, toner and method for producing the same, developer, process cartridge, image forming method and image forming apparatus
    Patent number: 8877420
    Abstract: A method for producing particles, including: bringing a compressive fluid into contact with a pressure plastic material, so as to plasticize the pressure plastic material; applying a shear force to the compressive fluid and the plasticized pressure plastic material, between which an interface exists, in the presence of a surfactant to granulate the pressure plastic material in the compressive fluid, so as to produce particles.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: November 4, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Chiaki Tanaka, Ryota Inoue, Taichi Nemoto, Yoshitaka Yamauchi
  • Electrophotographic photosensitive member, method for producing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
    Patent number: 8865381
    Abstract: An electrophotographic photosensitive member is provided in which both a long-term potential variation and a short-term potential variation are suppressed, a method for producing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are also provided. An intermediate layer of the electrophotographic photosensitive member is formed by applying a coating liquid for the intermediate layer, which contains an organic resin and a rutile-type acidic titania sol containing tin, and drying the applied coating liquid.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: October 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Tanaka, Yuka Ishiduka
  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and process for producing electrophotographic photosensitive member
    Patent number: 8865382
    Abstract: An electrophotographic photosensitive member having a surface layer containing a polymeric product obtained by polymerizing a specific adamantane compound, a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member, and a process for producing the electrophotographic photosensitive member.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: October 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Nonaka, Masato Tanaka
  • Electrophotographic toner and process for producing electrophotographic toner
    Patent number: 8865388
    Abstract: Disclosed is an decolorizable electrophotographic toner, containing a binder resin, an electron-donating color-developable agent, and a wax having a color-developing action and having an acid value of 60 mgKOH/g or more.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 21, 2014
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takayasu Aoki, Takahito Kabai, Tsuyoshi Itou
  • Imaging member and method of making an imaging member
    Patent number: 8852833
    Abstract: Imaging members having a support, an imaging layer disposed on the support, an outer layer disposed on the imaging layer and fluoropolymer particles imbedded in an outer surface of the outer layer. Image forming apparatuses having such imaging members. Processes for preparing an imaging member for an electrophotographic apparatus, the process involving coating an imaging layer with an outer layer formulation. The imaging layer can be disposed on a support. The outer layer formulation can be dried to form an outer layer disposed on the imaging layer and has an outer surface. Fluoropolymer particles are applied to the outer layer.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: October 7, 2014
    Assignee: Xerox Corporation
    Inventors: Gregory McGuire, Richard Klenkler, Yvan Gagnon, Yu Liu
  • Toner
    Patent number: 8846284
    Abstract: Provided is a toner comprising toner particles, wherein each of the toner particles has a core-shell structure composed of a core and a shell phase formed on the core, the shell phase contains a resin (B), and the core contains a binder resin (A), a colorant and a wax, wherein the toner particles contain the resin (B) in a specific amount with respect to the core, and wherein the solubility parameter (SP value) of the binder resin (A) is denoted by SP(A), the SP value of the resin (B) is denoted by SP(B), the SP value of a repeating unit with the smallest SP value from among repeating units constituting the resin (B) is denoted by SP(C), and the SP value of the wax is denoted by SP(W), each of the SP(A), SP(B), SP(C) and SP(W) satisfy specific relationships.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: September 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuya Kinumatsu, Atsushi Tani, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Ayako Okamoto, Yoshihiro Nakagawa, Toshifumi Mori, Takashige Kasuya
  • Developing apparatus and developing method
    Patent number: 8835090
    Abstract: An object of the present invention is to provide a developing apparatus which is less affected by usage environments, has high development efficiency for long term use and can provide a high quality image without image density non-uniformity. The present invention relates to a developing apparatus wherein a magnetic toner-carrying member has a work function value at the surface thereof within a specific range, a toner regulating member which regulates toner carried on the magnetic toner-carrying member is made of a specific material at a portion contacting the magnetic toner, the magnetic toner has an average circularity of 0.950 or more and the magnetic toner has a surface tension index within a specific range.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Matsui, Michihisa Magome, Shotaro Nomura, Atsuhiko Ohmori
  • Low strain anti-curl back coating for flexible imaging members
    Patent number: 8835085
    Abstract: Present embodiments relate generally to the flexible electrostatographic imaging members prepared to comprise a plasticized charge transport layer, plasticized ground strip layer, and a novel plasticized anti-curl back coating layer prepared to have internal stress/strain reduction, superb wear resistance property, and render the resulting flexible imaging members with absolute flatness to meet the functional requirement of electrostatographic imaging apparatuses. More particularly, the embodiments pertain to the reformulation of an anti-curl back coating layer comprising a novel high molecular weight film forming A-B diblock copolymer, a copolyester adhesion promoter, an organic or inorganic particles dispersion, and a plasticizer in the layer's material matrix.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: September 16, 2014
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
    Patent number: 8795936
    Abstract: An undercoat layer of an electrophotographic photosensitive member contains a polymer having a specific repeating structural unit in order to provide an electrophotographic photosensitive member that suppresses positive ghost, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: August 5, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunihiko Sekido, Michiyo Sekiya, Akihiro Maruyama, Shinji Takagi, Hideaki Nagasaka
  • Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
    Patent number: 8785089
    Abstract: The present invention provides an electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus, each of which has the electrophotographic photosensitive member. In the electrophotographic photosensitive member, a charge transport layer used as a surface layer contains a charge transport material, a polycarbonate resin A which has a specific amount of a specific repeating structural unit of a specific siloxane moiety, and a polyester resin C and/or a polycarbonate resin D, each of which has a specific repeating structural unit. In the charge transport layer, a matrix-domain structure is formed in which a matrix is formed from the charge transport material and the polyester resin C and/or the polycarbonate resin D, and domains are formed in the above matrix from the polycarbonate resin A.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: July 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Okuda, Tsutomu Nishida
  • Erasable toner and process for production thereof
    Patent number: 8785097
    Abstract: Disclosed is a decolorable toner produced by aggregating dispersed fine particles of a color material containing at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles containing at least a binder resin having a carboxyl group, then adding a compound having a carbodiimide group or an epoxy group reactive with the carboxyl group of the binder resin, and thereafter fusing the aggregate particles, respectively in an aqueous medium. The thus obtained decolorable toner can suppress the generation of fine powder by the release of erasable color material fine particles from the toner particles.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: July 22, 2014
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takayasu Aoki, Motonari Udo, Tsuyoshi Itou, Masahiro Ikuta, Takafumi Hara
  • Toner
    Patent number: 8785101
    Abstract: Provided is a toner containing toner particles, each of which includes a binder resin containing a polyester as a main component, a colorant, and a wax, in which the binder resin includes a block polymer in which a segment capable of forming a crystalline structure and a segment incapable of forming a crystalline structure are bonded, the toner has a maximum endothermic peak from the binder resin, as determined by differential scanning calorimetry measurement, with a peak temperature in a specific range and with an endothermic quantity in a specific range, and the wax is an ester wax having a functionality of 3 or more.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: July 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takaaki Kaya, Tetsuya Kinumatsu, Toshifumi Mori, Ayako Okamoto, Kenji Aoki, Shuntaro Watanabe, Atsushi Tani, Takashige Kasuya
  • Emulsion coloring materials for ink jet printers and methods of producing the same
    Patent number: 8771912
    Abstract: There is provided an emulsion coloring material which can be used on ordinary paper, has good color developability, and can be used for conventional erasable pens or printing inks of black or blue color, having sufficiently high densities. When use is made of an erasable emulsion coloring material capable of controlling color development and decolorization by the presence or absence of the interaction between a chromatic material and a color developer, the colored emulsion comprising a copolymer resin of at least one unit selected from styrene and styrene derivatives and at least one unit selected from an acrylic acid ester and a methacrylic acid ester having a substituent which comprises a carbon chain having 4 or more carbon atoms, coloring ability can be enhanced.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: July 8, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenji Sano, Satoshi Takayama, Takeshi Gotanda, Yumiko Sekiguchi
  • Fluorinated structured organic film photoreceptor layers containing fluorinated secondary components
    Patent number: 8765340
    Abstract: A imaging member, such as a photoreceptor, having an outermost layer that is a structured organic film (SOF) comprising a plurality of segments and a plurality of linkers including a first fluorinated segment, a second electroactive segment and fluorinated secondary components.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: July 1, 2014
    Assignee: Xerox Corporation
    Inventors: Sarah J. Vella, Matthew A. Heuft, Adrien P. Cote, Paul Gerroir
  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
    Patent number: 8765335
    Abstract: The electrophotographic photosensitive member includes a surface layer containing (?), (?) and (?).
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: July 1, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Tanaka, Kazumichi Sugiyama, Tsutomu Nishida
  • Method for producing an antenna structure for an RFID device, and dry toner for use in producing such antenna structure
    Patent number: 8758969
    Abstract: A method for producing an antenna structure for an RFID device, a dry toner for use in producing an antenna for an RFID device and a RFID device comprising an antenna structure made of fused toner are disclosed. In a method for producing an antenna structure for an RFID device, a dry toner comprising a polymeric binder and metallic particles is provided. The toner comprises particles having a resistance allowing triboelectric charging or a resistance allowing inductive charging, wherein said metallic particles are nanoparticles having a mean particle size below approximately 500 nm in at least one direction. In the method, a continuous layer of the dry toner is applied to a substrate in a desired shape of an antenna via an electrophotographic printing process, and subsequently the toner is fused to the substrate by heating the toner above its glass transformation temperature.
    Type: Grant
    Filed: December 22, 2007
    Date of Patent: June 24, 2014
    Assignee: Eastman Kodak Company
    Inventors: Detlef Schulze-Hagenest, Dinesh Tyagi
  • Laser processing enabling radio frequency identification (RFID) customization
    Patent number: 8758982
    Abstract: Methods, algorithms, processes, circuits, and/or structures for laser patterning suitable for customized RFID designs are disclosed. In one embodiment, a method of laser patterning of an identification device can include the steps of: (i) depositing a patternable resist formulation on a substrate having configurable elements and/or materials thereon; (ii) irradiating the resist formulation with a laser tool sufficiently to change the solubility characteristics of the resist in a developer; and (iii) developing exposed areas of the resist using the developer. Embodiments of the present invention can advantageously provide a relatively low cost and high throughput approach for customized RFID devices.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: June 24, 2014
    Assignee: Thin Film Electronics ASA
    Inventors: Criswell Choi, Patrick Smith, James Montague Cleeves, Joerg Rockenberger, Christopher Gudeman, J. Devin MacKenzie
  • Image forming method, toner and image forming apparatus
    Patent number: 8748071
    Abstract: To provide an image forming method including conveying a toner by means of a toner supply device that supplies the toner from inside a toner housing container into a developer housing section of a developing device with the use of a screw pump, and forming an image on a recording medium by developing a latent image on a latent image bearing member to form a toner image with the use of a developer and by transferring the toner image to the recording medium by means of a transfer device, wherein the toner is formed by adding small particle size silica to toner base particles, and wherein when A represents the average degree of circularity of the toner, and B, expressed as percent by mass, represents the amount of the small particle size silica relative to the mass of the toner base particles, the expression ?18A+17.92?B??34A+33.96 is satisfied.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: June 10, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Kojima, Toyoshi Sawada, Tsuneyasu Nagatomo