Patents Examined by John L. Goodrow
  • Patent number: 7781136
    Abstract: A toner comprising toner particles containing a colorant and a binder resin, the binder resin comprising a polyester resin, wherein the polyester resin comprises at least a polyester segment containing an aromatic dial component, the polyester segment being derived from an aromatic diol and a dicarboxylic acid, wherein a content of the polyester segment containing an aromatic dial component is higher in a surface-portion of the toner particle than in a central portion of the toner particle.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: August 24, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Ken Ohmura, Hiroshi Yamazaki
  • Patent number: 7781133
    Abstract: A photoconductor that includes, for example, a backing layer, a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein the outermost layer of said backing layer is comprised of a self crosslinked acrylic resin and a crosslinkable siloxane component.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: August 24, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Lanhui Zhang, Lin Ma, Dale S Renfer
  • Patent number: 7781135
    Abstract: A toner for developing electrostatic images including emulsion aggregation toner particles with a styrene acrylate latex resin, at least one additive, at least one colorant, and a charge control agent comprising 3,5 di-tert-butylsalicyclic acid zinc salt.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: August 24, 2010
    Assignee: Xerox Corporation
    Inventors: Daniel W Asarese, Sarah Paulson, Maura A Sweeney, Grazyna E Kmiecik-Lawrynowicz
  • Patent number: 7776499
    Abstract: A photoconductor comprising a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and in contact with the charge transport layer an overcoat layer comprised of a fluorinated poly(oxetane) polymer.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: August 17, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Lanhui Zhang, Lin Ma, Dale S Renfer
  • Patent number: 7776502
    Abstract: A toner for developing an electrostatic charge image, includes: a binder resin formed by reacting a polymerizable aromatic monomer having an ethylenically unsaturated double bond conjugated to an aromatic ring thereof, a nitrogen-containing polymerizable aliphatic monomer having an ethylenically unsaturated double bond and a sulfur-containing aliphatic compound to each other; and a colorant, wherein a ratio (MN/MS) of an amount of nitrogen (MN) to an amount of sulfur (MS) is in a range of from 1.0 to 15.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: August 17, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norihito Fukushima, Rieko Kataoka, Sakon Takahashi, Toshiyuki Yano
  • Patent number: 7776994
    Abstract: A resin particle dispersion liquid comprises: resin particles comprising polyester having terminal carboxyl groups, the polyester being obtained by polycondensation of a polycondensable monomer, wherein the polyester has the terminal carboxyl groups that are partially neutralized to form carboxyl anions, the resin particles in the resin particle dispersion liquid having a value of (da/(da+dc)) of from approximately 0.30 to approximately 0.90, when in an absorption spectrum of the resin particles measured with an infrared spectrometer, dc represents a peak intensity of the terminal carboxyl group in a range of from 1,780 to 1,680 cm?1, and da represents a peak intensity of the neutralized carboxyl anion in a range of from 1,670 to 1,550 cm?1, the polyester has an acid value of approximately 1 mg·KOH/g or more and less than approximately 15 mg·KOH/g before neutralization, the resin particles dispersion liquid comprises a divalent or higher organic acid in an amount of from approximately 0.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: August 17, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Fumiaki Mera, Hirotaka Matsuoka, Satoshi Hiraoka, Yuki Sasaki, Yasuo Matsumura
  • Patent number: 7771908
    Abstract: A photoconductor that includes a first layer, a supporting substrate thereover, a photogenerating layer, and at least one charge transport layer containing at least one charge transport component, and where the first layer is in contact with the supporting substrate on the reverse side thereof, and which first layer is comprised of a fluorinated poly(oxetane) polymer.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: August 10, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Lanhui Zhang, Lin Ma
  • Patent number: 7771907
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, a charge transport layer, and a top overcoating layer in contact with and contiguous to the charge transport layer.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: August 10, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, John F Yanus, Kenny-Tuan Dinh, Daniel V Levy
  • Patent number: 7767371
    Abstract: The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an electrostatographic imaging member comprising a charge transport layer that exhibits improved charge mobility transport.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: August 3, 2010
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, Gregory McGuire
  • Patent number: 7767376
    Abstract: The present disclosure provides processes for producing toners which include an annealing step and toners produced by these processes. The process includes a continuous annealing step, which increases the glass transition temperature of the resulting toner.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: August 3, 2010
    Assignee: Xerox Corporation
    Inventors: Mark E. Mang, Thomas C. Dombroski
  • Patent number: 7767373
    Abstract: Imaging members useful in electrostatographic apparatuses, including printers, copiers, other reproductive devices, and digital apparatuses. More particularly, imaging members having a binder of high molecular weight that is included in one or more layers of an imaging member to impart coating consistency and to provide for increased mechanical strength and improved wear.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: August 3, 2010
    Assignee: Xerox Corporation
    Inventors: Donald J. Goodman, Satish Parikh, Edward F. Grabowski, Kathleen M. Carmichael, David M. Skinner
  • Patent number: 7763408
    Abstract: A dispersion containing a coloring agent particle is mixed in a dispersion of a radical polymerizable monomer, and a reducing agent containing an iron(II) salt is added in the presence of a polymerization initiator to polymerize the dispersed radical polymerizable monomer by the action of a generated radical, thereby not only forming a binder resin fine particle but coagulating the binder resin fine particle and the coloring agent particle to form a coagulated particle.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: July 27, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Motonari Udo, Takashi Urabe, Tsuyoshi Itou, Masahiro Ikuta
  • Patent number: 7759038
    Abstract: Disclosed is a toner containing resin mother particles and oil, in which the volume-average particle diameter of the resin mother particles is not less than 2 ?m but less than 4 ?m, (volume-average particle diameter of the resin mother particles)/(number-average particle diameter of the resin mother particles) is more than 1 but less than 1.1, the oil is silicone oil or fluorine oil, and the content of the silicone oil or fluorine oil is not less than 0.05% by mass but less than 2% by mass relative to the resin mother particles.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: July 20, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Soichi Yamazaki, Ken Ikuma
  • Patent number: 7754402
    Abstract: The present invention provides an electrophotographic photoconductive member comprising a substrate, and a photoconductive layer containing a hole transferring material, a charge generating material and a binder resin, wherein a value (IV/OV value) in which the inorganic value is divided by the organic value of the binder resin is 0.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: July 13, 2010
    Assignee: Kyocera Mita Corporation
    Inventors: Kazunari Hamasaki, Shiho Kuboshima, Daisuke Kuboshima, Yuko Iwashita
  • Patent number: 7749672
    Abstract: An emulsion aggregation polyester toner including a polyester resin having modified end groups, wherein the polyester resin includes at least one carboxylic end group. A process of making the toner by oxidation of a polyester resin including reacting the polyester with a hypohalite and a phase transfer catalyst results in a polyester resin endcapped with at least one acidic group. Stable xerographic charging in all ambient environments for all colors, and excellent resistivity and cohesion of the toner, may be achieved.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: July 6, 2010
    Assignee: Xerox Corporation
    Inventor: Valerie M. Farrugia
  • Patent number: 7749675
    Abstract: A method of preparing a toner, including: preparing a colorant dispersion by mixing a reactive emulsifier and a colorant; preparing a toner composition by mixing a macromonomer including a hydrophilic group, a hydrophobic group and at least one reactive functional group, at least one polymerizable monomer and a chain transfer agent with the colorant dispersion; emulsion polymerizing the toner composition in a medium; and separating and drying the polymerized toner, wherein the amounts of the macromonomer and the chain transfer agent are controlled to regulate the configuration of toner particles. A toner prepared using the method, an image forming method using the toner, and an image forming apparatus using the toner are also provided by the invention. According to the method, the size and configuration of toner particles are easily controlled. In addition, the method minimizes the use of a surfactant, and decreases polluted water and waste water, which is very advantageous environmentally.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: July 6, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jun-young Lee, Kyung-yol Yon, Chang-kook Hong, Min-young Cheong
  • Patent number: 7745087
    Abstract: An electrostatic image developer contains a toner and a carrier having a resin coating layer formed on the surface of a core material containing a ferrite component, wherein a ratio R1/R2 is from 0.88 to 0.92 where R1 is the resistance value (?) of the developer having a toner concentration of 2 mass % in a state formed into a magnetic brush, at an applied voltage of 104 V/cm, and R2 is the resistance value (?) of the developer having a toner concentration of 12 mass % in a state formed into a magnetic brush, at an applied voltage of 104 V/cm.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: June 29, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yosuke Tsurumi, Akihiro Iizuka, Tsuyoshi Murakami
  • Patent number: 7745081
    Abstract: The present invention provides a diphenyl amine derivative having the excellent solubility to a solvent and compatibility to a binding resin, an efficient production method therefor, and an electrophotographic photoconductor having the excellent sensitivity, capable of effectively preventing generation of the black dots. A diphenyl amine derivative represented by the following general formula (1) is used: (In the general formula (1), R1 to R12 each are a hydrogen atom, an alkyl group which may have a substituent, or the like, Z is a ring structure linked with a benzene ring, which is a 4 to 8-membered ring including a hydrogen atom, a nitrogen atom, an oxygen atom, a carbon atom or a sulfur atom, m1, m2, n1, n2 each are 0 or 1, m1+n1 is 1 or 2, and m2+n2 is 1 or 2.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: June 29, 2010
    Assignee: Kyocera Mita Corporation
    Inventor: Hideki Okada
  • Patent number: 7745085
    Abstract: A toner for developing an electrostatic latent image that includes a crystalline polyester resin and a release agent, wherein structures in which the crystalline polyester resin contacts the release agent exist in a ruthenium-stained cross section of the toner, and if the cross-sectional area of these structures is labeled A, the cross-sectional area of lone portions of the release agent is labeled B, and the cross-sectional area of lone portions of the crystalline polyester resin is labeled C, then 40?100×A/(A+B+C)?70, 10?100×B/(A+B+C)?30, and 20?100×C/(A+B+C)?30.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: June 29, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takao Ishiyama, Takashi Inukai, Akitsugu Seto, Tomohito Nakajima
  • Patent number: 7745086
    Abstract: A developer material includes base particles that contain at least a binder resin and a colorant, and an external additive that covers the surface of the base particles. The developer material has a mean volume particle diameter in the range of 3.9-6.1 ?m, and includes pulverized base particles of an external additive. The external additive has a mean particle diameter in the range of 30-110 nm, the external additive being in an amount in the range of 1.0-3.0 weight parts based on 100 weight parts of the base particles. The external additive covers a surface of the base particles, a surface area of the base particles being covered with said external additive, the surface area being in the range of 30.6-58.6% of a total surface area of the base particles.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: June 29, 2010
    Assignee: Oki Data Corporation
    Inventor: Kenji Koido