Patents by Inventor Takatsugu Doi

Takatsugu Doi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130052570
    Abstract: A charge-transporting film includes a polymer of a compound represented by Formula (I): (Ra)n-Fa-Xa-Fa?-(Ra?)n???(I) wherein Fa and Fa? independently represent a charge-transporting sub-unit including an aromatic ring, Ra and Ra? independently represent a —CH?CH2 directly bonded to the aromatic ring of the charge-transporting sub-unit or a group represented by Formula (a), Xa represents an alkylene group or a bivalent group in which an alkylene group and a group selected from —O—, —S—, and ester are combined, n and n? independently represent an integer of 0 or more (wherein n and n? are not simultaneously 0), and L represents a linking group which is represented by *—(CH2)n?—O—CH2— and which is bonded to the aromatic ring of the charge-transporting sub-unit, wherein n? is 1 or 2 and the linking group is bonded to the aromatic, ring of the charge-transporting sub-unit with *.
    Type: Application
    Filed: February 8, 2012
    Publication date: February 28, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Wataru YAMADA, Katsumi NUKADA, Takatsugu DOI, Yuko IWADATE, Tomoya SASAKI
  • Patent number: 8373160
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer provided on the conductive substrate, and an outermost surface layer of the electrophotographic photoreceptor includes a cured film of a composition containing a charge transporting material having a chain polymerizable functional group and at least one selected from a nitroso compound, a nitrone compound or a nitro compound.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: February 12, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Tsuyoshi Miyamoto, Kenya Sonobe, Takatsugu Doi
  • Patent number: 8309286
    Abstract: The invention provides an electrophotographic photoreceptor having at least a conductive substrate and a photosensitive layer formed on the conductive substrate wherein the outermost surface layer of the photoreceptor is composed of a cured material containing at least one compound represented by the formula (I) and a surfactant that contains, in the molecule thereof, at least one structure selected from (A) a structure that is obtained by polymerizing an acrylic monomer having a fluorine atom, (B) a structure having a carbon-carbon double bond and a fluorine atom, (C) an alkyleneoxide structure, and (D) a structure having a carbon-carbon triple bond and a hydroxy group. In formula (I), Q is an organic group having a valency of n and having hole transportability, R is a hydrogen atom or an alkyl group, L is a divalent organic group, n is 1 or more, and j is 0 or 1.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: November 13, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Takatsugu Doi, Akira Hirano, Hitoshi Takimoto
  • Patent number: 8283096
    Abstract: An electrophotographic photoreceptor comprising: a conductive substrate; a photosensitive layer formed on the conductive substrate; and an outermost surface layer that is a layer made of a cured material of a composition including at least one compound represented by the following formula (I) and at least one compound having charge transportability and an azo group: wherein in formula (I), F represents an n-valent organic group having a hole transporting property, R represents a hydrogen atom or an alkyl group, L represents a divalent organic group, n represents an integer of 1 or more, and j represents 0 or 1.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: October 9, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Masahiro Iwasaki, Akira Hirano, Takatsugu Doi
  • Patent number: 8273510
    Abstract: The present invention provides an electrophotographic photoreceptor including a photosensitive layer on a conductive substrate, an outermost layer of the electrophotographic photoreceptor including a cured film of a composition which includes at least one charge transporting compound (a) having a charge transporting skeleton and at least two structural units represented by R—O—CO—CR??CH—R? in the same molecule, and at least one polycarbonate resin; a ratio (IA/IC) of an absorption peak intensity (IA) resulting from stretching vibration of a carbonyl group originating from the structural unit represented by R—O—CO—CR??CH—R? of the charge transporting compound (a) to an absorption peak intensity (IC) resulting from stretching vibration of a carbonyl group originating from the polycarbonate resin in an IR absorption spectrum of the outermost layer being from about 0.5 to about 10, and a width at half maximum of the absorption peak of the absorption peak intensity (IA) being about 25 cm?1 or more.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: September 25, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Wataru Yamada, Tsuyoshi Miyamoto, Kenya Sonobe, Takatsugu Doi
  • Patent number: 8273511
    Abstract: The invention provides an electrophotographic photoreceptor having comprising at least an electrically conductive substrate and a photo-sensitive layer provided on the conductive substrate, the outermost layer is being a cured film of comprising a composition containing at least one compound (a) having a triphenylamine structure and four or more methacryloyl groups in one and the same molecule.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: September 25, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Wataru Yamada, Takatsugu Doi, Hitoshi Takimoto, Akira Hirano
  • Publication number: 20120231379
    Abstract: Provided is a fluorine-containing resin particle dispersion including: fluorine-containing resin particles, a resin which is not dissolved in at least one solvent in a group of hydroxyl group-containing solvents including an alcohol-based solvent having 1 to 10 carbon atoms, containing no aromatic ring in the molecule structure, and a water-based medium, and which is adhered on the surface of the fluorine-containing resin particles, and at least one solvent, in which the resin is not dissolved, in the group of hydroxyl group-containing solvents, in which the fluorine-containing resin particles having the resin adhered on the surface thereof are dispersed.
    Type: Application
    Filed: August 12, 2011
    Publication date: September 13, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi NUKADA, Wataru YAMADA, Takatsugu DOI, Yuko IWADATE
  • Publication number: 20120202146
    Abstract: Provided is an electrophotographic photoreceptor including: a functional layer containing: a polymer of a first compound having a chain polymerizable functional group and a charge transporting skeleton in one molecule, and at least one second compound selected from a compound including at least one kind of the repeating unit represented by formula (AA) and having a weight average molecular weight of 10000 or less, a compound including at least one kind of the repeating unit represented by formula (BB) and having a weight average molecular weight of 10000 or less, a phthalic ester, a trimellitic ester, a fatty acid ester, a polyhydric alcohol ester, and a polyhydric alcohol ether.
    Type: Application
    Filed: August 3, 2011
    Publication date: August 9, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Wataru YAMADA, Takatsugu DOI, Katsumi NUKADA
  • Publication number: 20120196214
    Abstract: Provided is an electrophotographic photoreceptor including a substrate and an outermost layer containing a cured film of a composition containing a compound having a chain polymerizable functional group and a charge transporting skeleton in the same molecule, and at least one chain transfer agent selected from a compound having 4 or more primary thiol groups and a compound having 2 or more secondary thiol groups.
    Type: Application
    Filed: August 3, 2011
    Publication date: August 2, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kenya SONOBE, Katsumi NUKADA, Wataru YAMADA, Takatsugu DOI, Tsuyoshi MIYAMOTO, Yuko IWADATE
  • Publication number: 20120196215
    Abstract: Provided is a thiol group-containing charge transporting material represented by the following general formula (1): F-[(G)a1-(X)a2—Y—SH]b??(1) wherein F represents an organic group derived from a charge transporting compound, G represents a divalent organic group having 1 to 5 carbon atoms, X represents a group selected from a —CO—O— group, an —O—CO— group, and an —O— group, Y represents a divalent organic group having 1 to 5 carbon atoms, a1 and a2 each independently represent 0 or 1, and b represents an integer of 1 or more and 6 or less.
    Type: Application
    Filed: August 25, 2011
    Publication date: August 2, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi NUKADA, Kenya SONOBE, Wataru YAMADA, Takatsugu DOI, Tsuyoshi MIYAMOTO, Yuko IWADATE
  • Patent number: 8197921
    Abstract: A recording apparatus comprises: an intermediate transfer body; a releasing agent supply device that supplies a releasing agent onto the intermediate transfer body; a particle supply device that supplies hydrophilic ink-recipient particles that receive an ink, onto the releasing agent supplied onto the intermediate transfer body; an ink ejection device that ejects the ink onto the ink-recipient particles supplied onto the intermediate transfer body; and a transfer device that transfers the ink-recipient particles that received the ink, onto a recording medium from the intermediate transfer body, the releasing agent comprising at least one selected from the group consisting of a silicone oil, a fluorinated oil and an organic compound having a solubility parameter (SP value) of about 11 or less.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: June 12, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takatsugu Doi, Masaya Ikuno, Ken Hashimoto
  • Publication number: 20120100472
    Abstract: To provide an electrophotographic photoreceptor including the outermost surface layer formed from a cured film of a composition containing a compound having a chain polymerizable functional group and a charge transportable skeleton in a molecule and a chain transfer agent having a sulfur atom in a molecule, in which the reaction rate of the compound having a chain polymerizable functional group and a charge transportable skeleton in a molecule is about 90% to about 100% and the charge mobility of the cured film at an electric field intensity of 1.0×105 v/cm is from about 5.0×10?7 cm2/Vs to about 1.0×10?4 cm2/Vs.
    Type: Application
    Filed: April 19, 2011
    Publication date: April 26, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kenya SONOBE, Katsumi NUKADA, Wataru YAMADA, Takatsugu DOI, Tsuyoshi MIYAMOTO
  • Patent number: 8109626
    Abstract: A recording device including: an intermediate transfer member; a particle supply unit that supplies ink receiving particles that receive ink onto the intermediate transfer member; an ink ejecting unit that ejects ink to the ink receiving particles that have been supplied onto the intermediate transfer member; a transfer unit that transfers the ink receiving particles that have received the ink to a recording medium from the intermediate transfer member; a cleaning unit that cleans the ink receiving particles remaining on the intermediate transfer member after the transfer of the ink receiving particles by the transfer unit; and a cleaning aid particle supply unit that supplies cleaning aid particles.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: February 7, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takatsugu Doi, Ken Hashimoto
  • Publication number: 20120021345
    Abstract: Provided is to provide a photoelectric conversion device including an organic compound layer which contains polymer (a) having partial structures represented by the following formulae (1) and (2) respectively. In the formula, R1, R2, R3 each independently represent a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, X and Y each independently represent a divalent organic group having from 1 to 20 carbon atoms, a represents 0 or 1, and CT represents an organic group having a charge transportable skeleton.
    Type: Application
    Filed: February 11, 2011
    Publication date: January 26, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi NUKADA, Wataru YAMADA, Takatsugu DOI
  • Publication number: 20110318676
    Abstract: An electrophotographic photoconductor includes a conductive substrate and an outermost surface layer on the conductive substrate. The outermost surface layer contains a copolymer (a) derived from a reactive monomer having charge transport property and a reactive monomer having no charge transport property, and a polymer prepared by polymerizing, in the presence of the copolymer (a), a reactive monomer (b) that has a solubility parameter (SP value) different from a solubility parameter (SP value) of the reactive monomer having no charge transport property by about 2 (cal/cm3)1/2 or less.
    Type: Application
    Filed: October 22, 2010
    Publication date: December 29, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takatsugu DOI, Wataru YAMADA, Yuko IWADATE, Katsumi NUKADA
  • Publication number: 20110318677
    Abstract: An electrophotographic photoconductor includes a conductive substrate and an outermost surface layer formed on the conductive substrate and containing a binder resin and a copolymer derived from a reactive monomer having charge transport property and a reactive monomer having no charge transport property, the copolymer having a side chain with 4 or more carbon atoms in a constitutional unit derived from the reactive monomer having no charge transport property.
    Type: Application
    Filed: November 2, 2010
    Publication date: December 29, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takatsugu DOI, Wataru YAMADA, Yuko IWADATE, Katsumi NUKADA
  • Patent number: 8029123
    Abstract: A material set for recording includes: ink receiving particles that include a resin having an acid value of from about 50 mg KOH/g to about 750 mg KOH/g, and have a neutralization degree of from more than 0 to less than 1; and an ink that includes at least a colorant, a water-soluble solvent, and water, a value obtained by multiplying an electrical conductivity ? (S/m) of the ink by a viscosity ? (mPa·s) of the ink being from about 0.02 to about 5.0.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: October 4, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masaya Ikuno, Takatsugu Doi, Ken Hashimoto
  • Publication number: 20110229809
    Abstract: The present invention provides an image forming apparatus including: an electrophotographic photoreceptor; a charging unit; an electrostatic latent image forming unit that forms an electrostatic latent image; a developing unit that develops the electrostatic latent image formed at the electrophotographic photoreceptor by a developer to form a toner image, the developing unit storing the developer containing a toner having toner particles containing a crystalline resin and having a shape factor SF1 of from 100 to 150, a volume average particle diameter of from 3 to 6 ?m, and fluorocarbon-based resin particles as an external additive; a transfer unit; and a cleaning unit that cleans the surface of the electrophotographic photoreceptor with a blade containing urethane rubber, the blade disposed applying a pressure to the electrophotographic photoreceptor surface of 0.20 mN/mm or more.
    Type: Application
    Filed: August 17, 2010
    Publication date: September 22, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi NUKADA, Wataru Yamada, Tsuyoshi Miyamoto, Kenya Sonobe, Takatsugu Doi
  • Publication number: 20110215303
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer provided on the conductive substrate, and an outermost surface layer of the electrophotographic photoreceptor includes a cured film of a composition containing a charge transporting material having a chain polymerizable functional group and at least one selected from a nitroso compound, a nitrone compound or a nitro compound.
    Type: Application
    Filed: August 23, 2010
    Publication date: September 8, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Wataru YAMADA, Katsumi NUKADA, Tsuyoshi MIYAMOTO, Kenya SONOBE, Takatsugu DOI
  • Publication number: 20110207039
    Abstract: An electrophotographic photoreceptor is disclosed, in which an outermost surface layer of the electrophotographic photoreceptor is made of a cured film of a composition including a compound represented by the following Formula (M1) and a charge transporting material having a chain polymerizable functional group:
    Type: Application
    Filed: August 16, 2010
    Publication date: August 25, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Wataru YAMADA, Katsumi NUKADA, Takatsugu DOI, Tsuyoshi MIYAMOTO, Kenya SONOBE