Charge Transport Layer Patents (Class 430/58.05)
  • Patent number: 10831134
    Abstract: The present disclosure provides an electrophotographic belt which contributes to stable formation of an electrophotographic image of high quality. The electrophotographic belt includes a base layer and a surface layer, wherein the surface layer contains a binder resin, a perfluoropolyether and a comb-shaped graft copolymer, the comb-shaped graft copolymer is a copolymer of an acrylate or methacrylate having a fluoroalkyl group and a methacrylate macromonomer having a polymethyl methacrylate as a side chain, the comb-shaped graft copolymer has a number average molecular weight of 11000 or higher and 15000 or lower, and the comb-shaped graft copolymer has a peak-top molecular weight of 24000 or higher and 40000 or lower.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: November 10, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Keiji Karube
  • Patent number: 10615356
    Abstract: An electronic device includes a first electrode and a second electrode facing each other, an emission layer comprising a plurality of quantum dots, wherein the emission layer is disposed between the first electrode and the second electrode; a first charge auxiliary layer disposed between the first electrode and the emission layer; and an optical functional layer disposed on the second electrode on a side opposite the emission layer, wherein the first electrode includes a reflecting electrode, wherein the second electrode is a light-transmitting electrode, wherein a region between the optical functional layer and the first electrode comprises a microcavity structure, and a refractive index of the optical functional layer is greater than or equal to a refractive index of the second electrode.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: April 7, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae Young Chung, Eun Joo Jang, Oul Cho, Hyun A Kang, Tae Hyung Kim, Yun Sung Woo, Jeong Hee Lee
  • Patent number: 10538481
    Abstract: Provided is a method for purifying 1,5-pentanediamine comprising: providing 1,5-pentanediamine to be purified and treating the 1,5-pentanediamine to be purified by a reduction reaction to obtain purified 1,5-pentanediamine. Meanwhile, further provided is 1,5-pentanediamine prepared by the method. The purification method has a concise process and a simple operation, and is suitable for industrial production, and can significantly improve the quality of 1,5-pentanediamine.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: January 21, 2020
    Assignees: Cathay Biotech Inc., CIBT America Inc.
    Inventors: Bingbing Qin, Charlie Liu, Shanshi Guo, Benliang Hou, Xiucai Liu
  • Patent number: 10353305
    Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer on a conductive substrate, wherein the photosensitive layer is a laminate having a charge transport layer and a charge generation layer, the charge transport layer contains four or more types of compounds each having a maximum absorption wavelength falling within a wavelength range of from 300 nm to 600 nm in a tetrahydrofuran solution at 25° C., and maximum absorption wavelengths falling within the wavelength range of at least four types of the compounds of said four or more types of the compounds are separated from each other by 10 nm or more.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: July 16, 2019
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Akira Ando
  • Patent number: 10330720
    Abstract: Propagating brush discharge testing systems include an initiation electrode, a high-voltage switch, a sensor, and a controller. The initiation electrode has an exposed tip positioned adjacent to a surface of a test article. The high-voltage switch is configured to selectively isolate the initiation electrode from ground potential. The sensor is positioned and configured to detect a propagating brush discharge between the initiation electrode and the test article. The controller is programmed to operate the high-voltage switch to ground the initiation electrode.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: June 25, 2019
    Assignee: The Boeing Company
    Inventors: Dejan Nikic, Arthur C. Day
  • Patent number: 9904186
    Abstract: A layered, positively-charged electrophotographic photoreceptor, a method for manufacturing the photoreceptor and an electrophotographic apparatus using the photoreceptor are disclosed. The layered, positively-charged electrophotographic photoreceptor includes a conductive support on which is provided a sequential stack composed of a charge transport layer containing at least a first hole transport material and a first binder resin; and a charge generation layer containing at least a charge generation material, a second hole transport material, an electron transport material, and a second binder resin, wherein the charge generation layer and the charge transport layer have a total amount of residual solvents that is 50 ?g/cm2 or less. The photoreceptor is highly sensitive, highly durable, and has excellent image qualities including low image defects from cracks generated due to image memory or contact contamination.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: February 27, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Seizo Kitagawa, Yasushi Tanaka, Shinjiro Suzuki, Hiroshi Emori, Kazuki Nebashi
  • Patent number: 9874824
    Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer on a conductive substrate, wherein the photosensitive layer is a laminate having a charge transport layer and a charge generation layer, the charge transport layer contains four or more types of compounds each having a maximum absorption wavelength falling within a wavelength range of from 300 nm to 600 nm in a tetrahydrofuran solution at 25° C., and maximum absorption wavelengths falling within the wavelength range of at least four types of the compounds of said four or more types of the compounds are separated from each other by 10 nm or more.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: January 23, 2018
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Akira Ando
  • Patent number: 9864284
    Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: January 9, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Kawahara, Hirotoshi Uesugi, Akihiro Maruyama, Hirofumi Kumoi, Masato Tanaka, Hiroyuki Tomono, Shoma Hinata, Yota Ito, Daisuke Miura, Takashi Anezaki, Tatsuya Yamaai, Kazumichi Sugiyama
  • Patent number: 9740115
    Abstract: An electrophotographic photoreceptor includes a conductive substrate, an organic photosensitive layer on the conductive substrate, and an inorganic protective layer on the organic photosensitive layer. A layer that constitutes a surface of the organic photosensitive layer contains a charge transport material, a binder resin, silica particles, and a silicone compound.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: August 22, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tatsuki Sano, Hideya Katsuhara, Masaki Hirakata, Takeshi Iwanaga
  • Patent number: 9684254
    Abstract: A diamine compound is represented by general formula (1). In the general formula (1), R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 each represent, independently of one another, a hydrogen atom, a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14. m represents an integer of at least 1 and no greater than 3. n represents an integer of at least 0 and no greater than 2.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: June 20, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hideki Okada
  • Patent number: 9541848
    Abstract: The electrophotographic photoreceptor of the present invention at least includes a charge-generating layer, a charge-transporting layer, and a surface protective layer sequentially deposited on an electroconductive support, wherein the charge-transporting layer contains a charge-transporting material having an ionization potential (IPA); the surface protective layer contains a binder resin and a metal oxide microparticle having an ionization potential (IPB); and the ionization potential (IPA) and the ionization potential (IPB) satisfy the relationship represented by Expression (A): ?0.4 eV?(IPA?IPB)?0.4 eV.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: January 10, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Mari Konishi, Toshiyuki Fujita, Daisuke Kodama, Takeshi Nakamura, Toyoko Shibata
  • Patent number: 9448496
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer located on the charge generating layer. The charge transport layer contains a pigment that is absorptive with respect to a wavelength of exposed light. The pigment is a metal phthalocyanine pigment represented by General Formula (I) or a metal-free phthalocyanine pigment represented by General Formula (II), where X represents a sulfur atom or an oxygen atom. R1 represents an aryl group or an alkyl group. R2-R4 each represent a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, a phenoxy group, an alkylthio group, a phenylthio group, or a dialkylamino group. M represents a metal atom. Y represents non-substitution or an alkyl group, an alkoxy group, an aryloxy group, a halogen atom, an oxygen atom, or a hydroxyl group.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: September 20, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Jun Azuma, Keiji Maruo, Kensuke Okawa, Akihiko Ogata
  • Patent number: 9436104
    Abstract: An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, and a binder resin. The hole transport material contains an amine stilbene derivative represented by a general formula (1), and the binder resin contains a polycarbonate resin represented by a general formula (2).
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: September 6, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Jun Azuma, Keiji Maruo, Kensuke Okawa, Akihiko Ogata
  • Patent number: 9436107
    Abstract: A method of producing an electrophotographic photosensitive member includes: preparing a solution including a charge transporting substance, and at least one compound selected from the group consisting of a fluorine-atom-containing polyacrylate, a fluorine-atom-containing polymethacrylate, a polycarbonate having a siloxane bond, a polyester having a siloxane bond, a polystyrene having a siloxane bond, a silicone oil, a polyolefin, an aliphatic acid, an aliphatic acid amide and an aliphatic acid ester; preparing an emulsion by using the solution and water; forming a coat of the emulsion on a support; and heating the coat to form a charge transporting layer.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: September 6, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Murakami, Akihiro Maruyama, Hiroki Uematsu, Harunobu Ogaki, Atsushi Okuda
  • Patent number: 9411307
    Abstract: A process cartridge that can suppress production of a banding image attributed to contact rotation of an electrophotographic photosensitive member and a charging member and output a high-quality image is provided. The charging member includes an electro-conductive substrate and an electroconductive resin layer, the resin layer contains a binder, a conductive fine particle, and a bowl-shaped resin particle having an opening, and the surface of the charging member has a concavity derived from the opening of the bowl-shaped resin particle and a protrusion derived from the edge of the opening thereof. The electrophotographic photosensitive member includes a support and a photosensitive layer, and the surface layer in the photosensitive member contains a specific resin (?), a specific resin (?), and a specific compound (?).
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: August 9, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidekazu Matsuda, Daisuke Tanaka, Atsushi Uematsu
  • Patent number: 9389523
    Abstract: Provided is an electrophotographic photosensitive member excellent in suppression of image deletion and electric potential variation. The surface layer of the electrophotographic photosensitive member comprises a hole transporting substance. The hole transporting substance is one of a compound consisting of a carbon atom and a hydrogen atom, or a compound consisting of a carbon atom, a hydrogen atom, and an oxygen atom. The hole transporting substance comprises a conjugate structure containing 24 or more sp2 carbon atoms. The conjugate structure comprises a condensed polycyclic structure comprising 12 or more sp2 carbon atoms. A ratio of a number of sp2 carbon atoms is 55% or more based on a total number of carbon atoms in the hole transporting substance, and a ratio of a number of sp3 carbon atoms is 10% or more based on a total number of carbon atoms in the hole transporting substance.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: July 12, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Nakata, Shinji Takagi, Nobuo Kosaka, Koichi Suzuki
  • Patent number: 9341964
    Abstract: In a process for producing an electrophotographic photosensitive member, in particular, a process of forming a charge transporting layer, a production process is provided by which the stability of a charge transporting layer coating fluid even after its storage for a long time is improved so as to form a coat for a charge transporting layer having a high uniformity.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: May 17, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Harunobu Ogaki, Keiko Yamagishi, Atsushi Okuda, Yohei Miyauchi, Hiroki Uematsu, Kimihiro Yoshimura
  • Patent number: 9274496
    Abstract: Uneven charging is improved, and production of a banding image attributed to a slip between the charging member and the electrophotographic photosensitive member is suppressed. An electrophotographic process cartridge including a charging member and an electrophotographic photosensitive member which is electrically charged upon being brought into contact with the charging member, wherein the charging member includes a electro-conductive substrate and a surface layer formed on the electro-conductive substrate; the surface layer contains at least a binder resin, an electron conductive agent, and a resin particle having a plurality of pores inside thereof; the surface of the surface layer has a protrusion derived from the resin particle; the electrophotographic photosensitive member includes a support and a photosensitive layer formed on the support; and the surface layer of the electrophotographic photosensitive member contains a specific component.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: March 1, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noboru Miyagawa, Satoshi Koide, Takehiko Aoyama, Daisuke Tanaka
  • Patent number: 9217716
    Abstract: A method is provided for testing a charge generation layer disposed directly on an undercoat layer disposed directly on an aluminum-based cylindrical support member formed by extrusion and drawing having a periphery not subjected to cutting work. The method includes testing the charge generation layer for a defect or a suspected defect by irradiating the charge generation layer with light, and receiving reflected light from the charge generation layer with a light receiving device. The light emitted to the charge generation layer has a wavelength within the range of the absorption wavelengths of the charge generation layer, and whose transmittance to the undercoat layer is 0.3% or less.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: December 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wataru Kitamura, Ryoichi Tokimitsu, Masaki Nonaka, Mai Murakami
  • Patent number: 9075327
    Abstract: Flexible imaging members in electrophotography which have an improved plasticized charge transport layer formulation. The resulting imaging member is resistant to chemical contaminants, photoelectrically stable, fatigue cracking suppression, and has a simplified material structure which is curl-free without the need of an anticurl back coating layer. Process for making and using the member are also disclosed.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: July 7, 2015
    Assignee: XEROX CORPORATION
    Inventor: Robert C. U. Yu
  • Patent number: 9034545
    Abstract: A charge-transporting layer of an electrophotographic photosensitive member has a matrix-domain structure having a domain which comprises at least one resin selected from the group consisting of a resin A1 a resin A2 and a specific silicone oil, and a matrix which comprises resin C and a charge-transporting substance, wherein a content of the structural unit represented by the formula (A-1) and the structural unit represented by the formula (A-2) is from 10% by mass to 40% by mass based on the total mass of the resin A1 and the resin A2.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: May 19, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto
  • Publication number: 20150132689
    Abstract: The presently disclosed embodiments are directed generally to an electrostatographic imaging member having low surface energy and is wear resistant. The imaging members include a charge transport layer that comprises a silicone ester additive that provides these beneficial properties.
    Type: Application
    Filed: November 13, 2013
    Publication date: May 14, 2015
    Applicant: XEROX CORPORATION
    Inventors: JIN WU, Kenny-Tuan T. Dinh, Helen R. Cherniack, Lin Ma, Nancy L. Belknap
  • Patent number: 9017908
    Abstract: The presently disclosed embodiments are directed to flexible imaging members used in electrophotographic imaging apparatuses. More particularly, the embodiments pertain to electrophotographic imaging members which have imaging layer(s) formulated to comprise of a novel polymer blended binder comprising a bisphenol type polycarbonate and an organic acid-containing copolyester doped into the polycarbonate which provides improved properties and performance to the resulting imaging member. The formulated imaging layer(s) may further include a plasticizer.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: April 28, 2015
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato, J. Robinson Cowdery-Corvan, David Skinner, Dennis J. Prosser
  • Patent number: 9017909
    Abstract: The present disclosure is drawn to electrostatic printing. In an example, a coated photoconductive substrate can comprise a photoconductive substrate, the photoconductive substrate including a substrate having a charge generation layer and charge transport layer adhered thereto; and a top coating adhered to the photoconductive substrate. The top coating can comprise a cross-linkable polymer, a cross-linker, and a charge transport material, where the charge transport material is dispersed throughout the top coating and may be present in the top coating in an amount ranging from 20 wt % to 50 wt %.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: April 28, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Sivapackia Ganapathiappan, Krzysztof Nauka, Hou T. Ng
  • Publication number: 20150111138
    Abstract: An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a urethane resin having at least six radical polymerizable functional groups. The at least six radical polymerizable functional groups may include acrylate group, methacrylate group, styrenic group, allylic group, vinylic group, glycidyl ether group, epoxy group, or combinations thereof. This overcoat layer has an improved wear resistance, thus protecting the organic photoconductor drum from damage and extending its useful life.
    Type: Application
    Filed: December 23, 2014
    Publication date: April 23, 2015
    Inventors: Scott Daniel Reeves, David Glen Black
  • Publication number: 20150111137
    Abstract: Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising an overcoat layer which comprises a soluble filler that improves low surface energy and wear. The soluble filler is a silicone poly(ethylene glycol) ester which improves low surface energy and wear without negatively impacting electrical properties of the overcoat layer.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 23, 2015
    Applicant: XEROX CORPORATION
    Inventors: JIN WU, Kenny-Tuan T. Dinh, Qi Ying Li, Lin Ma, Than Sorn, Marc J. LiVecchi, Linda L. Ferrarese, Robert W. Hedrick
  • Publication number: 20150104738
    Abstract: A surface layer of an electrophotographic photosensitive member contains a cured product of a composition containing a hole transporting substance having an acryloyloxy group and/or a methacryloyloxy group and a siloxane-modified acrylic compound.
    Type: Application
    Filed: October 14, 2014
    Publication date: April 16, 2015
    Inventors: Shinji Takagi, Koichi Nakata
  • Publication number: 20150093695
    Abstract: An electrophotographic photosensitive member includes a laminated body including a conductive support, a first intermediate layer on the conductive support, and a second intermediate layer on the first intermediate layer, the first intermediate layer containing a binder resin and a metal oxide particle whose surface have been treated with an organic compound, and the second intermediate layer containing a cured product having electron transportability, in which the laminated body satisfies the following expression (1): R—nV/R_0V?0.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 2, 2015
    Inventors: Hiroyuki Tomono, Kunihiko Sekido, Atsushi Okuda, Takeshi Murakami
  • Publication number: 20150079510
    Abstract: An electrophotographic photoreceptor having a photosensitive layer which includes, as a resin binder, a copolymeric polyarylate resin having structural units of a Chemical Structural Formula 1, a method of producing the photoreceptor, an electrophotographic device including the electrophotographic photoreceptor, and a method of preparing the copolymeric polyarylate resin are provided. The electrophotographic photoreceptor reduces the amount of abrasion at the surface of a photoreceptor drum and lowers frictional resistance from the beginning until the end of printing, and moreover provides good images.
    Type: Application
    Filed: February 28, 2012
    Publication date: March 19, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Fengqiang Zhu, Shinjiro Suzuki, Quanqiu Zhang, Seishi Terasaki
  • Patent number: 8980508
    Abstract: A charge-transporting layer, which is a surface layer of an electrophotographic photosensitive member, has a matrix-domain structure having a matrix containing constituent ? (a polyester resin having a predetermined repeating structural unit) and a charge-transporting substance, and a domain containing constituent ? (a polycarbonate resin having a repeating structural unit having a predetermined siloxane moiety).
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: March 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Okuda, Harunobu Ogaki, Kazunori Noguchi, Shio Murai, Kazuhisa Shida, Takashi Anezaki
  • Publication number: 20150064614
    Abstract: A photoreceptor includes a substrate a charge generating layer disposed on the substrate and a charge transport layer disposed on the charge generating layer, the charge transport layer includes a hole transport molecule, a fluorinated diol, and a leveling agent, the charge transport layer is substantially free of a polymer binder and catalyst, and has a post-discharge voltage of less than about 10 volts.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 5, 2015
    Applicant: XEROX CORPORATION
    Inventors: Gregory McGuire, Sarah J. Vella, Adrien P. Cote, Yvan Gagnon, Brynn Dooley
  • Patent number: 8951702
    Abstract: A charge transport material having reduced photodeterioration is disclosed to be an ethylene compound having an ethylene double bond site, having a structure in which four different substituents are substituted at the ethylene double bond site, and having general formula (I) below where R1, R2 and R3 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 6 carbons or an alkoxyl group of 1 to 6 carbons; R4 is phenyl or tolyl; and Ar is one group selected from the group consisting of naphthyl, biphenyl, anthryl, xylyl, and phenanthryl. An electrophotographic photoreceptor and process for producing the electrophotographic photoreceptor also are disclosed. The electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate that includes the charge transport material.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: February 10, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Fengqiang Zhu, Yoichi Nakamura, Ikuo Takaki, Seizo Kitagawa, Shinjirou Suzuki
  • Publication number: 20150017580
    Abstract: An electrophotographic photoreceptor having a photosensitive layer formed on a conductive substrate, wherein the photosensitive layer contains oxygen-containing fluorinated fine particles in a surface layer thereof, and the oxygen-containing fluorinated fine particles have an oxygen composition ratio of 0.9 to 3.0% by atom based on the whole composition of the fine particles according to an X-ray fluorescence composition analysis.
    Type: Application
    Filed: May 20, 2014
    Publication date: January 15, 2015
    Inventors: Kotaro FUKUSHIMA, Kimiko KUMAZAWA, Koichi TORIYAMA, Takahiro KURAUCHI, Tomoko KANAZAWA, Chikako IIBACHI, Rikiya MATSUO
  • Publication number: 20150017577
    Abstract: The disclosure provides a flexible electrophotographic imaging member having an optically clear, cross-linked anticurl back coating of melamine formaldehyde to effect complete and absolute imaging member flatness. In particular embodiments, the anticurl back coating further includes an organic or inorganic particle dispersion.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Inventors: Robert C.U. Yu, Mark Muscato, J. Robinson Cowdery-Corvan
  • Patent number: 8927184
    Abstract: The present invention provides a method of producing an electrophotographic photosensitive member using a dispersion solution that shows high liquid stability in long-period storage and hardly causes aggregation of charge-transporting pigment particles during drying a coating. The method of producing an electrophotographic photosensitive member having a charge-transporting layer comprises a step of forming a coating film by applying a dispersion solution comprising polyolefin polymer particles and charge-transporting pigment particles as dispersoids and comprising a dispersion medium, and then forming the charge-transporting layer by heating the coating film and melting the polyolefin polymer particles, wherein the particles consisting of the polyolefin polymer particles and the charge-transporting pigment particles in the dispersion solution have a number average particle diameter of 50 nm or more and 300 nm or less and a degree of dispersion (standard deviation/number average particle diameter) of 1.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: January 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Michiyo Sekiya, Kunihiko Sekido, Akihiro Maruyama
  • 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
  • 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
  • Patent number: 8877413
    Abstract: The presently disclosed embodiments relate generally to a flexible imaging member having a novel ground strip layer. The flexible imaging member may have a full flexible imaging member structure with an anticurl backing coating (ACBC) as well as a structurally simplified flexible imaging member being ACBC-free.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: November 4, 2014
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 8859172
    Abstract: An electrophotographic photosensitive member has a surface layer that contains a polymer produced by the polymerization of a charge transporting substance having two or more methacryloyloxy groups per molecule. The surface layer contains a quinone derivative at a concentration of 5 ppm or more and 1500 ppm or less of the total mass of the polymer. The quinone derivative is a compound represented by the following formula (1) or a compound represented by the following formula (2) or both.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: October 14, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideaki Nagasaka, Masaki Nonaka, Masato Tanaka
  • Patent number: 8859171
    Abstract: A charge transport particle comprising a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein at a macroscopic level the covalent organic framework is a particle that has electroactive added functionality.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: October 14, 2014
    Assignee: Xerox Corporation
    Inventors: Matthew A. Heuft, Adrien Pierre Coté
  • Patent number: 8822115
    Abstract: An electrophotographic photoreceptor includes a conductive substrate, a photosensitive layer, and a surface layer that is provided on the photosensitive layer. The surface layer includes a cross-linked component which is a reaction product of compound A and compound B. The compound A is at least one compound selected from guanamine compounds and melamine compounds, and the compound B is a charge-transporting material. A structure derived from at least one compound selected from the guanamine compounds and the melamine compounds included in the surface layer amounts for 0.1% by weight to 5% by weight, and a structure derived from the charge-transporting material included in the surface layer amounts for 85% by weight or greater. Surface roughness Rz of the surface layer is from 0.1 ?m to 0.3 ?m, and the surface has at least one compound selected from fatty acid metal salt and fluorine resin particles.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: September 2, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuko Yamano, Daisuke Haruyama, Shinya Yamamoto
  • Publication number: 20140212799
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; an undercoat layer that is provided on the conductive layer and includes a binder resin, metal oxide particles, and an electron-accepting compound having an acidic group; and a photosensitive layer that is provided on the undercoat layer, wherein when the undercoat layer has a thickness of 20 ?m, a transmittance T1 of the undercoat layer to light having a wavelength of 1000 nm, a transmittance T2 of the undercoat layer to light having a wavelength of 650 nm, and a transmittance T3 of the undercoat layer to light having a maximum absorption peak wavelength of the electron-accepting compound in a wavelength range from 300 nm to 1000 nm satisfy the following expressions (1) and (2): 5?T1/T2?40??Expression (1): 0.25??log10(T3)??Expression (2):.
    Type: Application
    Filed: September 13, 2013
    Publication date: July 31, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Jiro KORENAGA, Hirofumi NAKAMURA, Mitsuhide NAKAMURA
  • Patent number: 8775121
    Abstract: The present embodiments are generally directed to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. More particularly, the embodiments pertain to an electrophotographic imaging member having a charge transport layer in which a charge transport molecule (CTM) concentration gradient is formed through a single coating pass using only a single charge transport layer solution, and time-of-flight based methods of measuring the CTM gradient through the thickness of the charge transport layer.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: July 8, 2014
    Assignee: Xerox Corporation
    Inventors: Richard A. Klenkler, Gregory McGuire
  • 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
  • Patent number: 8765338
    Abstract: A photoconductor and method of forming a photoconductor comprising forming a charge generation material comprising a plurality of quantum dots, and forming an active region comprising one or more photoconductor layers comprising the charge generation material including the quantum dots is disclosed.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: July 1, 2014
    Assignee: Brother International Corporation
    Inventors: Farzad Parsapour, Juzo Kuriyama, Rodney Loyd
  • Patent number: 8765218
    Abstract: The presently disclosed embodiments are directed generally to methods for making the core-shell fluorinated particles which are incorporated into the overcoat layers of an electrophotographic imaging member to reduce torque and cleaning failures during the photoreceptor cleaning process. The core-shell fluorinated particles are core-shell fluorinated nano- or micro-particles encapsulated in a melamine shell. The present embodiments also pertain to processes for making the overcoat layer comprising the core-shell fluorinated particles.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: July 1, 2014
    Assignee: Xerox Corporation
    Inventors: Woo Soo Kim, Nan-Xing Hu, Jennifer A. Coggan, Yvan Gagnon
  • 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
  • Patent number: 8765336
    Abstract: An electrophotographic photoreceptor and a manufacturing method therefore are disclosed. The electrophotographic photoreceptor includes a conductive base; and a photosensitive layer provided on the conductive base and containing a diadamantyl diester compound represented by General Formula (I) below: where, R1, R2 and R3 each independently represent a hydrogen atom, halogen atom, optionally substituted C1-6 alkyl group, optionally substituted C1-6 alkoxyl group, C6-20 aryl group or heterocyclic group, X and Z represent single bonds or optionally substituted C1-6 alkylene groups, and Y represents an OCO group or COO group. The electrophotographic photoreceptor has sufficient wear resistance and satisfactory properties as a photoreceptor, while being little affected by harmful gasses and environmental temperature and humidity.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: July 1, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Fengqiang Zhu, Yoichi Nakamura, Shinjiro Suzuki
  • Patent number: 8765334
    Abstract: Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising a protective outer layer which comprises light-absorbing composition that substantially prevents any light absorption by the overcoat layer. The composition comprises a low strength thermal plastic resin and a high optical density yellow dye. Thus, the light-blocking protective layer reduces the intrinsic light shock suffered by conventional overcoat layers without negatively impacting electrical properties of the overcoat layer and while improving print quality.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: July 1, 2014
    Assignee: Xerox Corporation
    Inventors: Liang-bih Lin, Kenny-Tuan T. Dinh, Emily K. Redman, Brian P. Gilmartin
  • Publication number: 20140178810
    Abstract: An image bearing member includes a substrate, and a photosensitive layer overlying the substrate, wherein an uppermost surface layer of the image bearing member has a hydrocarbon compound represented by the following Chemical Formula 1; and a three-dimensionally cross-linked polymer formed by polymerization reaction of a charge transport compound having three or more [tetrahydro-2H-pyran-2-yl)oxy]methyl groups linked with aromatic rings, wherein, in the polymerization reaction, part of the three or more [(tetrahydro-2H-pyran-2-yl)oxy]methyl groups is severed and detached from the charge transport compound, Ph1-Q1-Ph2-Q2-Ph3??Chemical Formula 1 where Q1 and Q2 independently represent methylene groups or ethylene groups, Ph1 and Ph3 independently represent phenyl groups with which one or two methyl groups are bonded, and Ph2 represents a phenylene group or a phenylene group having one methyl group.
    Type: Application
    Filed: December 4, 2013
    Publication date: June 26, 2014
    Inventors: Kazukiyo NAGAI, Yuuji Tanaka, Tetsuro Suzuki, Yuusuke Koizuka