Patents Examined by Christopher D. Rodee
  • Electrophotographic photosensitive member, process cartridge, and image forming apparatus
    Patent number: 10295918
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin contains a polyarylate resin (1). The polyarylate resin is represented by general formula (1). The photosensitive layer has a scratch resistance depth of no greater than 0.50 ?m. The photosensitive layer has a Vickers hardness of at least 17.0 HV.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: May 21, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tomofumi Shimizu, Keiji Maruo, Jun Azuma
  • Method to make a photoconductor drum having an overcoat using a dual curing process
    Patent number: 10289014
    Abstract: A method of preparing an organic photoconductor drum having a protective overcoat on its outermost surface is provided. In an example embodiment, a photoconductor drum having an electrically conductive substrate, a charge generation layer, a charge transport layer and an outermost protective overcoat layer is provided. The photoconductor drum is cured using a two-step process. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the photoconductor drum. A mask is sized and placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using ultraviolet light irradiation.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 14, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
  • Yellow toner
    Patent number: 10289017
    Abstract: Provided is a yellow toner which provides a sharper color than ever before in small amounts and which has excellent light resistance. A yellow toner comprising a binder resin and a yellow colorant, wherein a compound A represented by the following general formula (1) and a compound B represented by the following general formula (2) are contained as the yellow colorant, and wherein a total content of the compound A and the compound B is from 3 to 30 parts by mass with respect to 100 parts by mass of the binder resin, and a mass ratio of the content of the compound A to the content of the compound B (compound A/compound B) is from 0.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: May 14, 2019
    Assignee: ZEON CORPORATION
    Inventor: Takuya Otake
  • Method for curing an overcoat in a photoconductor used in an electrophotographic imaging device
    Patent number: 10289013
    Abstract: A method of curing a protective overcoat layer on the outermost portion of an organic photoconductor drum using dual curing process is provided. The first curing step applies either ionizing irradiation, such as with an electron beam or by gamma rays or applies non-ionizing irradiation such as ultraviolet light to the overcoated photoconductor drum. A mask or shield is sized to be placed over the print area of the initially cured photoconductor drum, thereby exposing the outermost edges of the photoconductor drum. The outer edges of the masked photoconductor drum is then exposed to a second curing step using non-ionizing irradiation such as ultraviolet light.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 14, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Weimei Luo, Mark Thomas Bellino, Rudolph Wayne Hrobsky
  • Microporous membrane for stereolithography resin delivery
    Patent number: 10286600
    Abstract: A system for building a structure. The system includes a reservoir; an immiscible fluid in the reservoir; a membrane operatively connected to the reservoir; channels and delivery ports in the membrane; a microliter amount of curable resin; a delivery system for delivering the microliter amount of curable resin to channels and delivery ports in the membrane and to the reservoir in contact with the immiscible fluid in the reservoir; and an energy source adapted to deliver energy to the reservoir onto the microliter amount of curable resin for building the structure.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: May 14, 2019
    Assignee: Lawrence Livermore National Security, LLC
    Inventor: Joshua R. Deotte
  • Toner, developer, toner housing unit and image forming apparatus
    Patent number: 10274853
    Abstract: A toner includes a binder resin; a release agent; and two or more inorganic fine particles as external additives. At least one of the inorganic fine particles is silica. When an ultrasonic oscillation is applied to a dispersion including the toner and a dispersant and a rate of the silica releasing from the toner is 20% based on total silica, an application energy of the ultrasonic oscillation is from 8 to 14 kJ, and from 70 to 130 kJ when the rate of the silica releasing from the toner is 50%.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: April 30, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Takayuki Itoh, Naohiro Watanabe, Takahiro Honda, Shingo Sakashita, Daisuke Inoue, Rintaro Takahashi, Ayumi Satoh
  • Photoreceptor for electrophotography and image forming apparatus employing the same
    Patent number: 10261430
    Abstract: An electrophotographic photoreceptor includes a conductive support, a photosensitive layer on the conductive support, and a protective layer on the photosensitive layer. The protective layer includes a binder resin, metal oxide particles, and fluororesin particles. The metal oxide particles include, on a surface thereof, a first surface-treating agent including fluorine atoms, and a second surface-treating agent including a polymerizable reactive group and a hydrophobic group. At least some of the metal oxide particles are supported on a surface of the fluororesin particles. The fluororesin particles are fixed to the binder resin via the at least some of the metal oxide particles supported on the surface of the fluororesin particles.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: April 16, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tomohito Chokan, Keiichi Ishikawa, Manabu Takezawa
  • Electrostatic latent image developing toner and toner external additive
    Patent number: 10254670
    Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a toner mother particle and an external additive attached to a surface of the toner mother particle. The external additive includes a plurality of resin particles each containing first temperature responsive polymer domains and second temperature responsive polymer domains. The second temperature responsive polymer domains have a lower critical solution temperature (LCST) higher than that of the first temperature responsive polymer domains.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: April 9, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yuma Uchihashi
  • Electrophotographic photoreceptor
    Patent number: 10234776
    Abstract: An electrophotographic photoreceptor has a charge generating layer, a charge transporting layer, and an outermost surface layer laminated in this order on a conductive support, wherein the outermost surface layer contains composite structural particles obtained by coating inorganic particles with oxygen-deficient conductive tin oxide, and the composite structural particles have an L value of 80 to 95, and primary particles thereof have an average particle diameter of 35 to 200 nm.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: March 19, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Seisuke Maeda, Kazunori Kurimoto, Kazuhiro Kuramochi
  • Toner and method of producing toner
    Patent number: 10228630
    Abstract: A toner comprising an external additive A, and a toner particle containing a binder resin and a colorant, wherein the external additive A: i) is an external additive that has a charge control agent on the surface thereof; ii) has a wall friction angle ? calculated from the following formula (1) of not more than 25.0° ?=?/5.0??formula (1); iii) has a number-average particle diameter (D1) of primary particles of at least 70 nm and not more than 500 nm; and iv) has a solidity as given by the following formula (2) of at least 0.40 and not more than 0.90 solidity=area of external additive A/area of region encompassed by envelope for external additive A?? formula (2).
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: March 12, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takuya Mizuguchi, Kazuo Terauchi, Yojiro Hotta, Takeshi Naka, Motohide Shiozawa, Masami Fujimoto
  • Antimicrobial sulfonated polyester resin
    Patent number: 10216111
    Abstract: Toner particles contain a core-shell resin particle containing at least one (sulfo) polyester containing a metal on nanoparticle, and a shell containing a metal ion nanoparticle.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: February 26, 2019
    Assignee: Xerox Corporation
    Inventors: Valerie M Farrugia, Alana R Desouza, Sandra J Gardner, Wendy Chi
  • Photoconductor, image forming apparatus, and process cartridge
    Patent number: 10209639
    Abstract: A photoconductor including a conductive support, an undercoat layer, a charge-generating layer, and a charge-transporting layer, at least the undercoat layer, the charge-generating layer, and the charge-transporting layer being disposed on the conductive support in an order mentioned, wherein the undercoat layer includes a binder resin and metal oxide particles, and the charge-generating layer includes a binder resin, a titanyl phthalocyanine pigment, and a salicylic acid derivative.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: February 19, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoharu Asano, Tetsuro Suzuki, Eiji Kurimoto, Daisuke Nii, Toshihiro Ishida
  • Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
    Patent number: 10209637
    Abstract: An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Nishida, Akira Sakakibara, Daisuke Miura, Yota Ito, Shoma Hinata, Tatsuya Yamaai, Nobuo Kosaka
  • Electrostatic ink compositions
    Patent number: 10197937
    Abstract: Herein is disclosed an electrostatic ink composition. The composition may comprise: pigment particles; a dispersant; a carrier liquid; a charge director comprising lecithin or a sulfate-based lipophilic moiety; and a tackifier which is dissolved in the carrier liquid.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: February 5, 2019
    Assignee: HP Indigo B.V.
    Inventors: Gil Fisher, Benjamin Dayan, Yana Reznick
  • Electrophotographic photosensitive member, process cartridge, and image forming apparatus
    Patent number: 10191397
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin contains a polyarylate resin. The polyarylate resin is represented by general formula (1). The hole transport material contains a compound represented by general formula (HTM1), (HTM2), (HTM3), (HTM4), (HTM5), (HTM6), or (HTM7). The photosensitive layer has a scratch resistance depth of no greater than 0.50 ?m. The photosensitive layer has a Vickers hardness of at least 17.0 HV.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: January 29, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Keiji Maruo, Tomofumi Shimizu, Jun Azuma
  • Carrier core material
    Patent number: 10185238
    Abstract: A carrier core material is provided that is formed with ferrite particles which can uniformly adhere a coupling agent to the entire surface. A carrier core material is formed with ferrite particles, and the powder pH of the ferrite particles is equal to or more than 9. Here, the ferrite particles are preferably formed of Mn ferrite or Mn—Mg ferrite. The ferrite particles preferably contain 45 wt % or more but 65 wt % or less of Fe, 15 wt % or more but 30 wt % or less of Mn and 5 wt % or less of Mg.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: January 22, 2019
    Assignees: DOWA ELECTRONICS MATERIALS CO., LTD., DOWA IP CREATION CO., LTD.
    Inventors: Yuto Kamai, Shinya Sasaki
  • Electrophotographic photoreceptor
    Patent number: 10175591
    Abstract: In an electrophotographic photoreceptor, an electric charge generating layer and an electric charge transport layer are laminated on a conductive support body in this order, a layer configuring an outermost surface of the electrophotographic photoreceptor contains composite structure particles in which a core material is inorganic particles, and the inorganic particles are coated with tin oxide doped with aluminum, and an average particle diameter of primary particles of the composite structure particles is 50 nm to 200 nm.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: January 8, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Seisuke Maeda, Kazunori Kurimoto, Kazuhiro Kuramochi
  • Quinone derivative and electrophotographic photosensitive member
    Patent number: 10175589
    Abstract: A quinone derivative is represented by general formula (1). In general formula (1), at least one of R1-R3 and at least one of R4-R6 each represent, independently of one another, an alkyl group having 4 to 10 carbon atoms or an alkyl group having 2 to 5 carbon atoms that has an aryl group having 6 to 14 carbon atoms. All other of R1-R3 and all other of R4-R6 each represent, independently of one another, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 14 carbon atoms, or a cycloalkyl group having 3 to 10 carbon atoms.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: January 8, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hideki Okada
  • Liquid electrophotographic varnish composition
    Patent number: 10168629
    Abstract: A liquid electrophotographic varnish composition comprising: a polymer resin; an epoxy-based cross-linking agent; a solid catalyst comprising at least one amine group; and a carrier liquid.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: January 1, 2019
    Assignee: HP Indigo B.V.
    Inventors: Tony Azzam, Ilanit Mor, Samer Farran, Albert Teishev, Guy Nesher, Getahun Biadglin, Haim Cohen, Benjamin Dayan, Yael Kowal-Blau, Eyal Shelef
  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
    Patent number: 10162278
    Abstract: Disclosed herein is an electrophotographic photosensitive member in which leakage hardly occurs even in the case of using a layer containing metal oxide particles as an electrically conductive layer in the electrophotographic photosensitive member, and which is compatible with definition in output images, the electrophotographic photosensitive member sequentially including: a support, an electrically conductive layer, and a photosensitive layer, the electrically conductive layer containing a binder material and particles represented by General Formula (1). Nb2.00O5.00-XNY??(1) (In Formula (1), Nb is a niobium atom, O is an oxygen atom, N is a nitrogen atom, and 0.00<Y<X?4.00).
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: December 25, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Jumpei Kuno, Kenichi Kaku, Taichi Sato, Takashi Anezaki, Atsushi Fujii