Polycyclo Ring System Having The Hetero Ring As One Of The Cyclo Systems Patents (Class 430/78)
  • Patent number: 10359714
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a single-layer photosensitive layer. The photosensitive layer contains at least a charge generating material and a compound represented by general formula (1). In general formula (1), R1 represents an aryl group having a carbon number of at least 6 and no greater than 22 and optionally having an alkyl group having a carbon number of at least 1 and no greater than 10, an alkyl group having a carbon number of at least 3 and no greater than 20, an aralkyl group having a carbon number of at least 7 and no greater than 20, a cycloalkyl group having a carbon number of at least 3 and no greater than 20, or an alkoxy group having a carbon number of at least 1 and no greater than 6. Chemical groups R2 each represent a halogen atom.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: July 23, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hideki Okada
  • Patent number: 10197928
    Abstract: The present invention relates to an electrophotographic photoreceptor which is a positive charging type electrophotographic photoreceptor comprising a conductive support and a photosensitive layer on the conductive support, wherein the photosensitive layer contains at least a charge generating material, a hole transport material, an electron transport material, and a binder resin in the same layer, and a residual potential VL1 at a point at which an exposure amount for forming a latent image is 0.3 ?J/cm2 is equal to or lower than 130 V when an initial surface potential V0 is set to +700 V, exposure with monochromatic light of 780 nm is performed and measurement is performed by a dynamic method.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: February 5, 2019
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Hiroe Fuchigami, Mitsuo Wada
  • Patent number: 10185237
    Abstract: An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and the amount of bisphenol residues represented by formula (3) after the polyarylate resin is hydrolyzed, is 0.2% to 1%, in terms of intensity ratio, based on the total amount of bisphenol residues represented by formula (2) and formula (3) after the polyarylate resin is hydrolyzed, the bisphenol residues being detected with a gas chromatograph employing a hydrogen flame ionization detector (FID).
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: January 22, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Akiteru Fujii, Rui Zhao, Yuka Nagao, Atsushi Yoshizawa, Yuuta Kumano
  • Patent number: 10095135
    Abstract: Provided is an excellent phthalocyanine crystal having high sensitivity and little fluctuation in sensitivity for a humidity change in a use environment and applicable to the martial for solar battery, electronic paper, electrophotographic photoreceptor, etc. Namely, phthalocyanine crystal obtained by bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form. Also, provided is an electrophotographic photoreceptor that not only exhibits high sensitivity but also has little fluctuation in sensitivity for a humidity change in a use environment. Further, provided is an electrophotographic photoreceptor cartridge and an image-forming device, both of which can produce a stable quality images for a humidity change in a use environment by using the electrophotographic photoreceptor.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: October 9, 2018
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Mitsuo Wada, Kazutaka Ida, Teruyuki Mitsumori, Hiroaki Takamura, Tadashi Mizushima
  • Patent number: 10067437
    Abstract: An electrostatic charge image developer includes: toner particles; silica particles treated with a silicone oil, which are externally added to the toner particles; and a carrier, wherein a volume average particle diameter of the carrier is equal to or greater than 20 ?m and smaller than 30 ?m, and a quantity ratio of an elemental silicon derived from a silicone oil and an elemental silicon derived from silica which are present on the surface of the carrier (silicone oil-derived elemental silicon/silica-derived elemental silicon) is in a range of 0.05 to 0.2.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: September 4, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masashi Ikeda, Emi Takahashi, Yuka Ishihara, Manabu Furuki, Makoto Kamisaki, Teppei Yawada
  • Patent number: 9971257
    Abstract: An electrophotographic photosensitive member including a surface layer containing a charge generating material and a polyester resin is provided. The polyester resin contains a structure having a 12- or higher-membered cycloalkylene group.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: May 15, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumichi Sugiyama, Kazunori Noguchi, Harunobu Ogaki
  • Patent number: 9696641
    Abstract: An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material and a hole transport material represented by general formula (1) shown below in a single layer. Titanyl phthalocyanine contained as the charge generating material exhibits a main peak at a Bragg angle 2?±0.2°=27.2° in a CuK? characteristic X-ray diffraction spectrum and satisfies either (B) or (C), shown below, in a differential scanning calorimetry spectrum. (B) A peak is not present in a range from 50° C. to 400° C., other than a peak resulting from vaporization of adsorbed water. (C) A peak is not present in a range from 50° C. to 270° C., other than a peak resulting from vaporization of adsorbed water, and a peak is present in a range from 270° C. to 400° C.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: July 4, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yuko Iwashita, Kazutaka Sugimoto, Takafumi Matsumoto
  • Patent number: 9417541
    Abstract: A toner including: toner particles each including a toner base particle and an external additive attached thereon, where the toner base particle includes a binder resin and a colorant, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.10 ?m or more but less than 0.50 ?m, a standard deviation of the lengths of the long sides of the protrusions is 0.2 or less, a coverage rate of the protrusions on the surface of the toner base particle is 10% to 90%, and the external additive includes fine inorganic particles whose surfaces have been treated with an amino group-containing silane coupling agent.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: August 16, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshimichi Ishikawa, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Kazuoki Fuwa, Tomohiro Fukao, Tomoharu Miki
  • Patent number: 9400438
    Abstract: The present invention relates to an electrophotographic photoreceptor comprising a conductive support and at least a photosensitive layer provided thereon, wherein the electrophotographic photoreceptor comprises an outermost layer which contains a specific charge transport substance and a specific compound.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: July 26, 2016
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Akiteru Fujii, Yuka Nagao
  • Patent number: 9268244
    Abstract: An electrostatic image developing toner including: toner base particles each including a binder resin and a colorant; and an external additive, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.1 ?m or more but less than 0.5 ?m, a standard deviation of the lengths of the long sides of the protrusions is 0.2 or less, a coverage rate of the protrusions on the surface of each toner base particle is 10% to 90%, and the external additive includes an external additive (A) which is fine inorganic particles each containing silicone oil.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: February 23, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Fukao, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Kazuoki Fuwa, Tomoharu Miki
  • Patent number: 9229342
    Abstract: A surface layer of an electrophotographic photosensitive member contains (?) a particular siloxane-modified resin, (?) a particular compound, and a charge transporting substance. (?) is at least one compound selected from the group consisting of hexanol, heptanol, cyclohexanol, benzyl alcohol, ethylene glycol, 1,4-butanediol, 1,5-pentanediol, diethylene glycol, diethylene glycol ethyl methyl ether, ethylene carbonate, propylene carbonate, nitrobenzene, pyrrolidone, N-methylpyrrolidone, methyl benzoate, ethyl benzoate, benzyl acetate, ethyl 3-ethoxypropionate, acetophenone, methyl salicylate, dimethyl phthalate, and sulfolane.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Anezaki, Kazuhisa Shida, Masashi Nishi, Hirofumi Kumoi, Daisuke Tanaka, Kazumichi Sugiyama
  • Patent number: 9141008
    Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer, in which the undercoat layer contains a polymerized product of a compound represented by the formula (1) or a polymerized product of a composition containing a compound represented by the formula (1).
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: September 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunihiko Sekido, Nobuhiro Nakamura, Atsushi Okuda, Michiyo Sekiya, Yota Ito
  • Publication number: 20150147691
    Abstract: A photosensitive layer of an electrophotographic photosensitive member contains a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2?±0.2° of 7.0°, 16.6°, 20.8°, and 26.9° in X-ray diffraction with CuK? radiation.
    Type: Application
    Filed: November 24, 2014
    Publication date: May 28, 2015
    Inventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
  • Patent number: 8906586
    Abstract: A coating fluid for photosensitive-layer formation having high productivity and stability and a process thereof are provided. Also provided are a high-performance electrophotographic photoreceptor and an image-forming apparatus which are capable of forming high-quality images even in various use environments and are less apt to cause image defects such as black spots or color spots. The objects are accomplished with a process for producing a coating fluid which is for forming a photosensitive layer of an electrophotographic photoreceptor and comprises a charge-generating material and a binder resin, wherein a dispersing medium having an average particle diameter in the range of from 1.0 ?m to 350 ?m is used as a dispersing medium for dispersing the charge-generating material in the coating fluid for photosensitive-layer formation. The coating fluid for photosensitive-layer formation produced by this process is preferable as a photosensitive layer of an electrophotographic photoreceptor.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: December 9, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Teruyuki Mitsumori, Kozo Ishio, Hiroe Fuchigami
  • Publication number: 20140356772
    Abstract: A photoconductor that includes, for example, a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, and a charge transport layer, and where the charge transport layer contains a mixture of a charge transport component and a bio-based polycarbonate.
    Type: Application
    Filed: June 3, 2013
    Publication date: December 4, 2014
    Applicant: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8889324
    Abstract: An image bearing member including an electroconductive substrate, and a photosensitive layer provided overlying the electroconductive substrate, the photosensitive layer containing at least one charge transport materials selected from the group consisting of a naphthalene tetracarboxylic acid diimide-isoindol derivative represented by the following chemical structure 1, a naphthalimide-isoindol derivative represented by the following chemical structure 2, and a triphenyl amine-isoindol derivative represented by the following chemical structure 3, where R1 and R2 independently represent a hydrogen atom, a substituted or non-substituted alkyl group, an alkoxy group, a substituted or non-substituted aromatic hydrocarbon group, a halogen atom, and a nitro group, k represents an integer of 1 to 4, and l represents an integer of from 1 to 5 and R3 represents a substituted or non-substituted alkyl group, a substituted or non-substituted cycloalkyl group, and a substituted or non-substituted aromatic hydrocarbo
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: November 18, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Arai, Tomoyuki Shimada
  • Patent number: 8846282
    Abstract: Provided is an excellent phthalocyanine crystal having high sensitivity and little fluctuation in sensitivity for a humidity change in a use environment and applicable to the martial for solar battery, electronic paper, electrophotographic photoreceptor, etc. Namely, phthalocyanine crystal obtained by bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form. Also, provided is an electrophotographic photoreceptor that not only exhibits high sensitivity but also has little fluctuation in sensitivity for a humidity change in a use environment. Further, provided is an electrophotographic photoreceptor cartridge and an image-forming device, both of which can produce a stable quality images for a humidity change in a use environment by using the electrophotographic photoreceptor.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: September 30, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Mitsuo Wada, Kazutaka Ida, Teruyuki Mitsumori, Hiroaki Takamura, Tadashi Mizushima
  • Publication number: 20140242507
    Abstract: A positively chargeable single-layer electrophotographic photosensitive member includes a single-layer photosensitive layer. The single-layer photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The electron transport material contains two or more compounds selected from the group consisting of compounds represented by the chemical formulas (1) to (4) below.
    Type: Application
    Filed: February 26, 2014
    Publication date: August 28, 2014
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Tomofumi SHIMIZU, Hiroki TSURUMI, Yohei YAMAMOTO, Eiichi MIYAMOTO
  • Publication number: 20140212801
    Abstract: A photosensitive layer or a charge generation layer of an electrophotographic photosensitive member contains a gallium phthalocyanine and a particular diamine compound such as 1,2-diaminoethane or 1,3-diaminopropane. The content of the particular diamine compound in the photosensitive layer or the charge generation layer is from 10 ppm to 1,000 ppm (mass ratio) based on the gallium phthalocyanine.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
  • Publication number: 20140212804
    Abstract: A solution of a gallium phthalocyanine contains a compound of formula (1) and a gallium phthalocyanine of formula (2), H2N—CH2—R1—CH2—NH2??(1) wherein R1 represents a single bond, or a substituted or unsubstituted alkylene group having 1 to 10 main-chain carbon atoms, a substituent of the substituted alkylene group is an alkyl group having 1 to 3 carbon atoms, an alkyl group having 1 to 3 carbon atoms and being substituted with an amino group, or a hydroxy group, one of the carbon atoms in the main chain of the alkylene group may be replaced with an oxygen atom, a sulfur atom, or a bivalent group represented by the formula —NR2—, and R2 represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or an alkyl group having 1 to 3 carbon atoms and being substituted with an amino group, and wherein X1 represents a chlorine atom or hydroxy group.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
  • Publication number: 20140065530
    Abstract: A photosensitive layer of an electrophotographic photosensitive member includes a phthalocyanine pigment and a specific dicyanoethylene compound. Alternatively, the photosensitive layer and/or an undercoat layer of the electrophotographic photosensitive member include a specific dicyanoethylene compound, and the photosensitive layer includes the phthalocyanine pigment.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tsutomu Nishida, Junpei Kuno, Kaname Watariguchi, Masataka Kawahara, Masato Tanaka
  • Patent number: 8563204
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a hydroxygallium phthalocyanine, a hydroxyaluminum phthalocyanine, a polymeric binder, and a silanol.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: October 22, 2013
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8530124
    Abstract: A hydroxygallium phthalocyanine composite pigment, which is a composite pigment wherein an azo compound expressed by the following general formula (a) is conjugated to a hydroxygallium phthalocyanine pigment, wherein the hydroxygallium phthalocyanine composite pigment has diffraction peaks at least at 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1°, and 28.3° on an X-ray diffraction spectrum with Bragg angle of 2?±0.2°, using Cu—K? X-rays: A(H)n??General Formula (a) where A is a residue of an azo compound; H is a hydrogen atom; the residue A is bonded to one or more hydrogen atoms, where the number of the hydrogen atoms is expressed with n, via one or more heteroatoms which are selected from the group consisting of N and O, and form part of the residue A; and n is an integer of 1 to 9.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: September 10, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiromi Sakaguchi, Masafumi Ohta, Yoshiki Yanagawa
  • Publication number: 20130149639
    Abstract: An intermediate transfer member that includes a mixture of a polyamideimide, an ammonium alkylphosphate, an optional polysiloxane, and an optional conductive filler.
    Type: Application
    Filed: February 6, 2013
    Publication date: June 13, 2013
    Applicant: Xerox Corporation
    Inventor: Xerox Corporation
  • Patent number: 8441003
    Abstract: A phosphorescent polymer compound including structural units that are derived from a compound represented by Formula (1): wherein R1 to R8 and L are as defined herein.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: May 14, 2013
    Assignee: Showa Denko K.K.
    Inventor: Yoshiaki Takahashi
  • Patent number: 8349457
    Abstract: Perfluoroisopropyl-substituted perfluorophtalocyanines, including zinc (II), copper (II) and oxo-vanadium (IV) complexes of 29H,31H,1,4,8,11,15,18,22,25-octakis-fluoro-2,3,9,10,16,17,23,24-octakis-perfluoro(isopropyl)phthalocyanine (F64Pc), may be sublimed under high vacuum conditions. The compounds/molecules produce advantageous thin films (20-100 nm) on glass substrates by physical vapor deposition. Many potential applications of the disclosed compounds/molecules are disclosed, e.g., as semiconductor materials. In situ electrical conduction and optical transmission measurements during the deposition process reveal the formation of conducting pathways and potential microscopic intermolecular electronic couplings.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 8, 2013
    Assignee: New Jersey Institute of Technology
    Inventors: Sergiu M. Gorun, Olga Tsaryova, Lukasz Lapok
  • Patent number: 8304153
    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: Grant
    Filed: September 7, 2010
    Date of Patent: November 6, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Ryota Arai
  • Patent number: 8278016
    Abstract: An electrophotographic photoconductor including an electroconductive support and a photoconductive layer provided thereon, wherein the photoconductive layer includes a charge generating material, an electron transporting material and a hole transporting material, the electron transporting material being a diphenoquinone compound represented by formula (1) described herein, the hole transporting material being a compound represented by formula (2) described herein.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: October 2, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Shimoyama, Eiji Kurimoto, Takaaki Ikegami, Kohsuke Yamamoto, Tadayoshi Uchida, Takumi Shinohara, Hajime Suzuki
  • Patent number: 8236469
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. In particular, the present embodiments pertain to an improved imaging member comprising a single layer in which the single layer further comprises a combination of one or more high mobility hole (charge) transport molecules and electron transport molecules.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: August 7, 2012
    Assignee: Xerox Corporation
    Inventors: Nancy L. Belknap, Katlyn Mallory, Helen Cherniack, Edward F. Grabowski
  • Patent number: 8192905
    Abstract: An electrophotographic photoconductor contains a photosensitive layer and a conductive substrate, wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer containing a charge generating material, an electron transporting material expressed by the General Formula (1) and a hole transporting material expressed by the General Formula (2):
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: June 5, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Shimoyama, Eiji Kurimoto, Shinichi Kawamura
  • Patent number: 8138300
    Abstract: There is disclosed an intermediate transfer member that includes a layer of a poly(imide-carbonate) copolymer having dispersed therein conductive particles. The layer can be a surface layer.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: March 20, 2012
    Assignee: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu, Jin Wu
  • Patent number: 8064795
    Abstract: An electrophotographic image forming apparatus, including a photoreceptor, a charger charging the surface of the photoreceptor, an irradiator irradiating the surface of the photoreceptor with imagewise light to form an electrostatic latent image thereon, an image developer developing the electrostatic latent image with a developer including a toner to form a toner image on the surface of the photoreceptor, and a transferer transferring the toner image onto a transfer material, wherein the photoreceptor includes an electroconductive substrate, and a photosensitive layer overlying the electroconductive substrate and including a charge generation material and a specific charge transport material.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: November 22, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Shimoyama, Eiji Kurimoto, Michitaka Sasaki, Shin-ichi Kawamura
  • Publication number: 20110268472
    Abstract: To provide an electrophotographic photosensitive member that can reproduce good images with less positive ghost and also has a good photosensitivity, the electrophotographic photosensitive member is incorporated in its photosensitive layer with a copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (2), or a copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (3).
    Type: Application
    Filed: January 29, 2010
    Publication date: November 3, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kunihiko Sekido, Hideaki Nagasaka, Michiyo Sekiya, Shinji Takagi, Akihiro Maruyama
  • Patent number: 8039625
    Abstract: Briefly described, embodiments of this disclosure include coronene charge-transport materials, methods of forming coronene charge-transport materials, and methods of using the coronene charge-transport materials.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: October 18, 2011
    Assignee: Georgia Tech Research Corporation
    Inventors: Seth Marder, Zesheng An, Jungsheng Yu, Bernard Kippelen
  • Patent number: 8029955
    Abstract: Provide is an electrophotographic photoreceptor exhibiting excellent evenness of halftone images together with fine line reproduction, and an image forming method thereof, as to a photoreceptor in which an oxytitanium phthalocyanine pigment having a maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction. Also disclosed is an electrophotographic photoreceptor possessing a body having cylindrical conductive support provided thereon photosensitive layer containing oxytitanium phthalocyanine pigment having maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction, and flanges jointed at both ends of the body, wherein at least one of flanges is fitted with driving shaft having drive hole having at least 3 sides, and a ratio B/A of cross-sectional area B of engaging part of rotation shaft to rotate the electrophotographic photoreceptor with respect to cross-sectional area A of the drive hole is 0.890-0.998.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: October 4, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Eiichi Sakai, Yoshihiko Eto, Kimiyuki Itou, Akihiko Itami, Takeo Oshiba
  • Patent number: 8007972
    Abstract: An object of the present invention is to provide an image forming apparatus containing an electrophotographic photoconductor, a charging unit, an exposing unit, a developing unit, a transfer unit and a cleaning unit, wherein the electrophotographic photoconductor contains a support and at least a photosensitive layer disposed on the support, wherein the photosensitive layer contains a charge generating material and a compound expressed by the following Structural Formula (1), and wherein, in the Structural Formula (1), “R1” and “R2” may be identical to each other or different, and represent any one of hydrogen atom, alkyl group which may be substituted, cycloalkyl group which may be substituted and aralkyl group which may be substituted.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: August 30, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Eiji Kurimoto, Keisuke Shimoyama, Michio Kimura, Shinichi Kawamura, Takeshi Takada, Yasuyuki Yamashita, Naohiro Toda, Hideo Nakamori
  • Patent number: 7998650
    Abstract: Disclosed herein is a method for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of mixing 30˜100 wt % sulfuric acid and an oxytitanium phthalocyanine crude in a mixing ratio between 100:1 and 1:1, homogeneously grinding the mixture in a wet grinder filled with zirconia or glass beads as grinding media at ?20° C.˜60° C. for 0.1˜24 hours, and removing the grinding media from the ground mixture using a solvent. According to the method, oxytitanium phthalocyanine usable as a high-quality charge generating material can be prepared without the use of expensive and difficult-to-handle reactants, such as trifluoroacetic acid and pentafluoropropionic acid. Further disclosed is an oxytitanium phthalocyanine charge generating material prepared by the method.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: August 16, 2011
    Assignee: PHTALOS Co., Ltd.
    Inventors: Ki Suck Jung, Jong Ho Kwon, Seong Soo Park, Jun Sik Shin, Woo Ho Son, Seung Wook Song
  • Publication number: 20110159420
    Abstract: To provide a gallium phthalocyanine compound, which is expressed by the following general formula (I) where R1 to R32 are each independently a hydrogen atom, an alkoxy group, an alkylthio group, an alkyl group, a halogen atom, a nitro group, or an aryl group.
    Type: Application
    Filed: December 27, 2010
    Publication date: June 30, 2011
    Inventors: Hiromi Sakaguchi, Masafumi Ohta, Yoshiki Yanagawa
  • Patent number: 7947417
    Abstract: A process for preparing a high sensitivity titanyl phthalocyanine (TiOPc) pigment includes dissolving a Type I TiOPc in a suitable solvent, precipitating an intermediate TiOPc pigment by quenching the solution comprising the dissolved Type I TiOPc in a solvent system comprising an alcohol and alkylene chloride such as, for example, methylene chloride, and treating the intermediate TiOPc pigment with monochlorobenzene. The resultant TiOPc pigment, which is designated as a Type V TiOPc, is suitable for use as a charge generating material in a photoreceptor of an imaging device.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: May 24, 2011
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Liang-Bih Lin, Ah-Mee Hor, Roger E. Gaynor, Justin F. Galloway
  • Patent number: 7919220
    Abstract: An electrophotographic photoreceptor, comprising: an electroconductive substrate; and a photosensitive layer located overlying the electroconductive substrate, wherein the photosensitive layer is a single-layered layer comprising a charge generation material and an electron transport material having the following specific formula (1): wherein the charge generation materials is a titanylphthalocyanine having a specific CuK? 1.542 ? X-ray diffraction spectrum.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: April 5, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Shimoyama, Eiji Kurimoto, Shinichi Kawamura
  • Publication number: 20110045390
    Abstract: An electrophotographic photosensitive member having a support and a photosensitive layer formed on the support, wherein the photosensitive layer contains a boron complex which is a product of the reaction of a compound having a phenolic hydroxyl group and a carbonyl group with a boron halide. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.
    Type: Application
    Filed: August 6, 2010
    Publication date: February 24, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Masato Tanaka
  • Patent number: 7871747
    Abstract: To provide an electrophotographic photoconductor that has a layer containing a compound represented by the following general formula (1), and an image forming apparatus using the electrophotographic photoconductor. where R1 and R2 independently represent any one of a hydrogen atom, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group, and R3, R4, R5, R6, R7, R8, R9 and R10 independently represent any one of a hydrogen atom, halogen atom, cyano group, nitro group, amino group, hydroxyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: January 18, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Shimoyama, Eiji Kurimoto, Takeshi Orito, Tatsuya Niimi, Shinichi Kawamura, Yoshiki Yanagawa, Michitaka Sasaki
  • Patent number: 7869749
    Abstract: A semiconductive rubber roller comprising a toner-transporting portion whose outermost layer is formed essentially of vulcanized rubber containing 0.1 to 30 parts by mass of a phthalocyanine compound for 100 parts by mass of the vulcanized rubber. An electric resistance value of the semiconductive rubber roller which is measured at a temperature of 23° C. and a humidity of 55% is in a range of 103 to 109?, when a voltage of 100V is applied thereto.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: January 11, 2011
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Yoshihisa Mizumoto, Noriaki Hitomi, Hirotoshi Murakami, Yajun Zhang
  • Patent number: 7838191
    Abstract: The present invention provides a monolayer type electrophotographic photoconductor which can effectively suppress the generation of an exposure memory and exhibits high sensitivity and an image forming apparatus using the monolayer type electrophotographic photoconductor. In an electrophotographic photoconductor which has a monolayer type photoconductive layer including at least a charge generating agent, a hole transfer agent, an electron transfer agent and a binding resin on a substrate, the charge generating agent contains oxo-titanyl phthalocyanine crystal, the electron transfer agent has a reduction potential thereof set to a value which falls within a range from ?0.97 to ?0.83 V, and the reflection absorbance (A/?) of the photoconductive layer with respect to light having a wavelength of 700 nm, a film thickness (d/m) of the photoconductive layer, and the concentration (C/weight %) of the oxo-titanyl phthalocyanine crystal of the photoconductive layer (100 weight %) satisfy a following formula (1).
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: November 23, 2010
    Assignee: Kyocera Mita Corporation
    Inventors: Daisuke Kuboshima, Kazunari Hamasaki, Yuko Iwashita
  • Patent number: 7824936
    Abstract: Disclosed herein is a method of preparing a low resistance metal line, is a method of manufacturing a dispersion type AC inorganic electroluminescent device and a dispersion type AC inorganic electroluminescent device manufactured thereby, in which a light-emitting layer and a dielectric layer between a lower electrode and an upper electrode are simultaneously formed through a single process using spin coating, thereby simplifying the overall manufacturing process and decreasing the manufacturing cost, and furthermore, the contact interface between the light-emitting layer and the dielectric layer is increased, therefore increasing the brightness of the device.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: November 2, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Shang Hyeun Park, Tae Won Jeong, Se Gi Yu, Min Jong Bae
  • Patent number: 7812154
    Abstract: Disclosed herein are a method and an apparatus for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of homogeneously mixing an oxytitanium phthalocyanine crude with an organic solvent while microwave energy having a frequency of 0.1˜100 GHz and a power of 10˜3,000 W and ultrasonic wave energy having a frequency of 1˜1,000 kHz and a power of 10˜5,000 W are applied thereto, and reacting the mixture at 30˜100° C. for 0.5˜5 hours. The apparatus comprises: a magnetron 1 capable of generating a frequency of 0.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: October 12, 2010
    Assignee: Phthalos Co., Ltd
    Inventors: Jong Ho Kwon, Ki Suck Jung, Woo Ho Son, Seong Soo Park, Jin Phil Ko, Hyun Suk Jung
  • Publication number: 20100203436
    Abstract: An electrophotographic photoconductor system for use in an electrophotographic device and method of using the same. The electrophotoconductor system comprises an electroconductive support, a charge generation layer disposed on the electroconductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a photosensitive material comprising titanyl phthalocyanine, and at least one oligomeric phenylene additive. The electrophotographic photoconductor system is capable of absorbing light having a wavelength of about 350 nm to about 850 nm.
    Type: Application
    Filed: February 11, 2009
    Publication date: August 12, 2010
    Inventors: Mark Thomas Bellino, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
  • Patent number: 7759031
    Abstract: A photoconductor comprising an optional supporting substrate, a fluorogallium phthalocyanine containing photogenerating layer, and at least one charge transport layer.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: July 20, 2010
    Assignee: Xerox Corporation
    Inventors: Daniel V. Levy, Liang-Bih Lin, Jin Wu
  • Patent number: 7747197
    Abstract: An electrophotographic image forming apparatus, including a photoreceptor, a charger charging the surface of the photoreceptor, an irradiator irradiating the surface of the photoreceptor with imagewise light to form an electrostatic latent image thereon, an image developer developing the electrostatic latent image with a developer including a toner to form a toner image on the surface of the photoreceptor, and a transferer transferring the toner image onto a transfer material, wherein the photoreceptor includes an electroconductive substrate, and a photosensitive layer overlying the electroconductive substrate and including a charge generation material and a specific charge transport material.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: June 29, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Shimoyama, Eiji Kurimoto
  • Patent number: 7727693
    Abstract: An object of the invention is to provide an electrophotographic photoreceptor showing high responsivity even under a low temperature and low humidity circumstance and capable of compatibilize the decrease of the size and the increase in the image forming speed of an electrophotographic apparatus. In a photosensitive layer of an electrophotographic photoreceptor, oxotitanium phthalocyanine having a crystal form showing a diffraction peak at a Bragg angle 2? (error: 2?±0.2°) of 27.2° in an X-ray diffraction spectrum is contained as a charge generating substance, and an enamine compound represented by the general formula for example, the structural formula (1-1) is contained as a charge transporting substance. Accordingly, the electrophotographic photoreceptor showing high responsivity even under a low temperature and low humidity circumstance is realized.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: June 1, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuya Ishida, Akihiro Kondoh, Takatsugu Obata