Organosilicon Or Organogermanium In Charge Transport Layer Patents (Class 430/58.2)
  • Patent number: 10877413
    Abstract: A fixing belt includes a polyimide layer. The polyimide layer includes polyimide and an aprotic solvent. The solvent has a boiling point not lower than 230° C. and a solubility parameter not less than 24.5 (J/cm3)1/2 and not greater than 30.7 (J/cm3)1/2. The solvent has a content not less than 0.1 ppm and not greater than 1000 ppm in the polyimide layer.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: December 29, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroya Abe, Atsuo Hirai, Asae Kamata, Yasuhide Fujiwara
  • Patent number: 9933739
    Abstract: A drum unit includes a photosensitive drum and a cleaning member. A scratch remaining depth measured by a scratch test of the photosensitive drum under a following Test Condition 1 is 110 nm or less. Test Condition 1 is; test environment temperature=25° C.; test environment humidity=50%; test indenter=pre-mount type Berkovich indenter; scratch direction=horizontal direction; scratch speed=20 ?m/sec; initial load=0 mN; maximum reaching load=4 mN; and load at the time of measuring the scratch remaining depth=1.9 mN.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: April 3, 2018
    Assignee: Oki Data Corporation
    Inventor: Masato Hirano
  • Patent number: 9920191
    Abstract: A surface property-improving agent for molded bodies made of polyolefin resins contains 50.0 parts to 90.0 parts by mass of a non-polar wax with a melting point of 50° C. to 100° C. and 10.0 parts to 50.0 parts by mass of a vinyl copolymer obtained by copolymerizing two types of monomers (b1) and (b2). The sum of the non-polar wax and the vinyl copolymer is 100.0 parts by mass. The monomer (b1) is styrene and/or acrylonitrile. The vinyl copolymer contains 0.1 parts to 49.9 parts by mass of the monomer (b1) and 0.1 parts to 9.9 parts by mass of the monomer (b2) wherein the sum of the monomer (b1) and the monomer (b2) is 10.0 parts to 50.0 parts by mass. To 100.0 parts by mass of a polyolefin resin, 0.5 parts to 10.0 parts by mass of the agent is added. The monomer (b2) is a methacryloxypropyl polyorganosiloxane.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: March 20, 2018
    Assignee: NOF Corporation
    Inventors: Yusuke Sakata, Toru Tamura, Yasushi Sugihara
  • Patent number: 9684277
    Abstract: Provided are a process cartridge and an image-forming method each of which has a satisfactory cleaning property even at the initial stage of the use of a brand-new process cartridge or electrophotographic apparatus, and hence can suppress a reduction in image quality due to the contamination of a charging member. The charge transporting layer of an electrophotographic photosensitive member contains a specific polyarylate resin or polycarbonate resin, and a toner contains a specific fine particle on the surface of a toner particle.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: June 20, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuki Yamamoto, Atsushi Okuda, Yuka Ishiduka, Shuhei Moribe, Koji Nishikawa
  • Patent number: 9482970
    Abstract: An organic photoconductor includes: a conductive substrate; a charge generation layer formed on the conductive substrate; a charge transport layer formed on the charge generation layer; and a protective coating formed on the charge transport layer. The protective coating comprises nanoparticles incorporated in an in-situ cross-linked polymer matrix. A process for increasing mechanical strength in an organic photoconductor is also provided.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: November 1, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Krzysztof Nauka, Zhang-Lin Zhou, Lihua Zhao
  • Patent number: 9163136
    Abstract: A nitrile rubber composition containing a carboxyl group-containing nitrile rubber and an allylamine-based polymer which contains units expressed by the following general formula (1) is provided. (In the general formula (1), R1, R2, and R3 respectively independently are one selected from a group including a hydrogen atom, alkyl group containing 1 to 4 carbon atoms which may have substituents, aryl group containing 6 to 12 carbon atoms which may have substituents, and halogen atom.).
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: October 20, 2015
    Assignee: ZEON CORPORATION
    Inventors: Masato Sakamoto, Tomonori Nakashima, Kazuhiro Ejiri, Masanobu Shinohara
  • Patent number: 9146457
    Abstract: Provided is a photoreceptor having an appropriate surface frictional force that enables a cleaning angle, at which the slipping between the surface of the photoreceptor surface and the blade is prevented and the overturning and vibrating of the blade are prevented, to be easily obtained.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: September 29, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seung-ju Kim, Ji-uk Kim
  • Patent number: 9116451
    Abstract: A doped protective coating for extending a lifetime of an organic photoconductor is provided. The coating includes an in-situ cross-linked polymer matrix and a substantially uniformly distributed dopant therein. The dopant comprises a charge transport molecular species. A process for coating the organic photoconductor and a coated organic photoconductor are also disclosed.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: August 25, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Krzystof Nauka, Zhang-Lin Zhou, Lihua Zhao
  • Patent number: 9091951
    Abstract: In an electrophotographic photosensitive member having a surface layer containing a polymer obtainable by polymerization of a compound having a chain-polymerizable functional group, the compound having a chain-polymerizable functional group includes a compound represented by formula (1).
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: July 28, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Nonaka, Hideaki Nagasaka, Masato Tanaka
  • Patent number: 9054319
    Abstract: An organic electroluminescence device includes an anode, a cathode, and an organic thin-film layer interposed between the anode and the cathode. The organic thin-film layer includes a phosphorescent-emitting layer containing a host and a phosphorescent dopant, and an electron transporting layer that is provided closer to the cathode than the phosphorescent-emitting layer. The host contains a substituted or unsubstituted polycyclic fused aromatic skeleton.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: June 9, 2015
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Kazuki Nishimura, Toshihiro Iwakuma, Kenichi Fukuoka, Chishio Hosokawa, Jun Endo, Nobuhiro Yabunouchi, Hiroshi Yamamoto
  • 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
  • Patent number: 9023561
    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: Grant
    Filed: November 13, 2013
    Date of Patent: May 5, 2015
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Kenny-Tuan T. Dinh, Helen R. Cherniack, Lin Ma, Nancy L. Belknap
  • 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: 8980509
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component ? and a component ?, and a domain comprising a component ?.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: March 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda, Shio Murai, Harunobu Ogaki
  • Patent number: 8956792
    Abstract: Provided is an electrophotographic photosensitive member which is excellent in terms of both continuous reduction of contact stress with contact members and the like and potential stability during repeated use. A charge transport layer which serves as a surface layer of an electrophotographic photosensitive member has a matrix-domain structure including a matrix containing a component [?] (polycarbonate resin D having a specific repeating structural unit) and a charge-transporting substance and domains containing a component [?] (polycarbonate resin A having a repeating structural unit including a specific siloxane moiety).
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: February 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Okuda, Harunobu Ogaki, Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Shio Murai
  • Patent number: 8921020
    Abstract: Provided is an electrophotographic photosensitive member, including: a support; and a photosensitive layer, which is provided on the support, in which: a surface layer of the electrophotographic photosensitive member includes a terminal siloxane-containing polyester resin having a specific structure; and a lower layer provided in contact with the surface layer includes a polycarbonate resin, a polyester resin, or a polyvinyl acetal resin, having a specific structure.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: December 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shio Murai, Harunobu Ogaki, Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda
  • Patent number: 8865380
    Abstract: A charge transport layer, which is the surface layer of an electrophotographic photosensitive member, contains a charge transporting material, and a polyester resin A having a repeating structural unit including a specific siloxane moiety and at least one of a polyester resin C having a specific structure and a polycarbonate resin D having a specific structure as a binder resin. The content of the siloxane moiety in the polyester resin A is from 5% by mass or more to 30% by mass or less based on the total mass of the polyester resin A. The charge transport layer includes a domain made of the polyester resin A in a matrix made of the charge transporting material and at least one of the polyester resin C and the polycarbonate resin D.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: October 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Harunobu Ogaki, Shio Murai, Atsushi Ochi, Koji Takahashi
  • Patent number: 8846281
    Abstract: An electrophotographic photosensitive member having a surface layer which contains a silicon-containing compound in an amount of less than 0.6% by mass based on the whole solid content in the surface layer, where the silicon-containing compound in the surface layer has a siloxane moiety in an amount of 0.01% by mass or more, based on the whole solid content in the surface layer, and its surface has specific depressions. Also disclosed are a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: September 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Okuda, Hirotoshi Uesugi, Kazunori Noguchi, Tsutomu Nishida
  • Publication number: 20140205941
    Abstract: The charge transporting layer as the surface layer of an electrophotographic photosensitive member includes a charge transporting substances represented by any one of formulae (1) to (5), a specific compound, and a specific resin (binder resin). The specific compound is 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, or sulfolane.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 24, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masashi Nishi, Takashi Anezaki, Kazuhisa Shida, Hirofumi Kumoi, Daisuke Tanaka, Kazumichi Sugiyama
  • Patent number: 8785089
    Abstract: The present invention provides an electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus, each of which has the electrophotographic photosensitive member. In the electrophotographic photosensitive member, a charge transport layer used as a surface layer contains a charge transport material, a polycarbonate resin A which has a specific amount of a specific repeating structural unit of a specific siloxane moiety, and a polyester resin C and/or a polycarbonate resin D, each of which has a specific repeating structural unit. In the charge transport layer, a matrix-domain structure is formed in which a matrix is formed from the charge transport material and the polyester resin C and/or the polycarbonate resin D, and domains are formed in the above matrix from the polycarbonate resin A.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: July 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Okuda, Tsutomu Nishida
  • Publication number: 20140154618
    Abstract: A charge-transporting layer of an electrophotographic photosensitive member contains a charge-transporting substance, a resin A having a specific structural unit and a resin C having a specific structural unit as resins, and a compound D having a specific structural unit, and the charge-transporting layer contains domains containing the resin A1, the resin A2 and the compound D in a matrix containing the charge-transporting substance and the resin C.
    Type: Application
    Filed: November 13, 2013
    Publication date: June 5, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto
  • Publication number: 20140154617
    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: Application
    Filed: November 12, 2013
    Publication date: June 5, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto
  • Publication number: 20140134525
    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: Application
    Filed: November 12, 2013
    Publication date: May 15, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Anezaki, Kazuhisa Shida, Masashi Nishi, Hirofumi Kumoi, Daisuke Tanaka, Kazumichi Sugiyama
  • Publication number: 20140093815
    Abstract: A charge-transporting layer includes a matrix-domain structure. The domain contains a polyester resin A. The matrix contains a charge-transporting substance and at least one of a polyester resin C and a polycarbonate resin D.
    Type: Application
    Filed: September 18, 2013
    Publication date: April 3, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yuki Yamamoto, Harunobu Ogaki, Akihiro Maruyama
  • Patent number: 8669027
    Abstract: The present invention is an electrophotographic photosensitive member including a charge-transporting layer as the surface layer of the electrophotographic photosensitive member having a matrix-domain structure including: a matrix including a component ? (at least one resin of a polycarbonate resin C having a specific repeating structural unit and a polyester resin D having a specific repeating structural unit), and ? (charge-transporting substance having a specific structure); and a domain including a component ? (polycarbonate resin A having a repeating structural unit containing a specific siloxane moiety).
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: March 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Anezaki, Kazunori Noguchi, Shio Murai, Kazuhisa Shida, Atsushi Okuda, Harunobu Ogaki
  • Publication number: 20140023962
    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: Application
    Filed: March 30, 2012
    Publication date: January 23, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Harunobu Ogaki, Kazunori Noguchi, Shio Murai, Kazuhisa Shida, Takashi Anezaki
  • 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
  • Publication number: 20130202994
    Abstract: To provide an amine compound, represented by General Formula (I) below: [In General Formula (I), R1 and R2 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group, which may be identical or different; m and n are an integer of 1 or 0; Ar1 represents a substituted or unsubstituted aromatic hydrocarbon group; Ar2 and Ar3 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group; and Ar1 and Ar2 or Ar2 and Ar3 may bind to each other to form a substituted or unsubstituted heterocyclic group including a nitrogen atom.
    Type: Application
    Filed: January 29, 2013
    Publication date: August 8, 2013
    Inventors: Tomoyuki SHIMADA, Masayoshi NOMURA, Ryota ARAI
  • Publication number: 20130202327
    Abstract: Provided is an electrophotographic photosensitive member, including: a support; and a photosensitive layer, which is provided on the support, in which: a surface layer of the electrophotographic photosensitive member includes a terminal siloxane-containing polyester resin having a specific structure; and a lower layer provided in contact with the surface layer includes a polycarbonate resin, a polyester resin, or a polyvinyl acetal resin, having a specific structure.
    Type: Application
    Filed: October 25, 2011
    Publication date: August 8, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shio Murai, Harunobu Ogaki, Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda
  • Publication number: 20130202326
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component [?] and a component [?] (charge-transporting substances having specific structures), and a domain comprising a component [?](resin [?1], or resin [?1] and resin [?2]).
    Type: Application
    Filed: October 25, 2011
    Publication date: August 8, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazuhisa Shida, Atsushi Okuda, Kazunori Noguchi, Takashi Anezaki, Harunobu Ogaki, Shio Murai
  • Patent number: 8383305
    Abstract: An image forming apparatus including a latent image bearing member, a charging device, a latent electrostatic image formation device, a development device, a transfer device, and a lubricant supplying device, the latent image bearing member satisfying (I), (II) and (III): |(A1?B1)?(A2?B2)|?5.0??(I) B1?1 (atomic %)??(II) 1 (nm)?X?30 (nm)??(III), where, by XPS analysis, A1 and B1 represent oxygen and silicon atom content ratio in a cross-linked surface layer, respectively, A2 represents oxygen atom content ratio in a surface dug through a cross-linked surface layer along a direction perpendicular to the latent image bearing member surface, to an electroconductive substrate at depth point X where B1 decreases to not greater than B1×0.5, and B2 represents the silicone atom content ratio in the surface at X.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: February 26, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiro Sugino, Tomoharu Asano, Keisuke Shimoyama
  • Patent number: 8361685
    Abstract: The disclosed embodiments are directed to processes for removing photoreceptor coatings from a substrate, wherein the photoreceptor coatings disposed over a substrate of an electrophotographic photoreceptor. More specifically, the present embodiments discloses a photoreceptor coatings removal process comprises subjecting an electrophotographic photoreceptor to a stripping solution that separates the coatings from the substrate.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: January 29, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Kent J. Evans, Yuhua Tong, Nancy L. Belknap, Helen R. Cherniack, Robert P. Altavela, Edward F. Grabowski
  • Publication number: 20120301182
    Abstract: The present invention is an electrophotographic photosensitive member including a charge-transporting layer as the surface layer of the electrophotographic photosensitive member having a matrix-domain structure including: a matrix including a component ? (at least one resin of a polycarbonate resin C having a specific repeating structural unit and a polyester resin D having a specific repeating structural unit), and ? (charge-transporting substance having a specific structure); and a domain including a component ? (polycarbonate resin A having a repeating structural unit containing a specific siloxane moiety).
    Type: Application
    Filed: October 5, 2011
    Publication date: November 29, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Anezaki, Kazunori Noguchi, Shio Murai, Kazuhisa Shida, Atsushi Okuda, Harunobu Ogaki
  • Publication number: 20120301181
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising: at least one resin selected from the group consisting of a polycarbonate resin C and a polyester resin D; and at least one charge-transporting substance selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (1?), and a domain comprising a polycarbonate resin A.
    Type: Application
    Filed: August 18, 2011
    Publication date: November 29, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Harunobu Ogaki, Kazunori Noguchi, Atsushi Okuda, Shio Murai, Kazuhisa Shida, Takashi Anezaki
  • Patent number: 8293439
    Abstract: An electrophotographic photoreceptor including a conductive substrate, a photosensitive layer, and a surface layer, which satisfies the following inequations: 0.005<WRa(LMH)<0.03??(i) 0.010<WRa(LHH)<0.03??(ii) 0.005<WRa(LML)<0.20??(iii) WRa(LLH)>WRa(LMH)??(iv) WRa(LLH)>WRa(LHH)??(v) wherein WRa (?m) represents a center-line average roughness of frequency components LHH, LHL, LMH, LML, LLH, and LLL that are obtained by subjecting a one-dimensional data array of a surface profile of the electrophotographic photoreceptor to wavelet transformation multiresolution analysis so as to be separated into 6 frequency components; thinning a one-dimensional data array of the lowest frequency component so that the number of data array is reduced to 1/40; and subjecting the thinned one-dimensional data array to wavelet transformation multiresolution analysis so as to be separated into the 6 frequency components LHH, LHL, LMH, LML, LLH, and LLL.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: October 23, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukio Fujiwara, Hidetoshi Kami, Kazuhiro Egawa, Shinji Nohsho, Mayumi Yoshihara, Mihoko Matsumoto, Kohsuke Yamamoto
  • Publication number: 20120263494
    Abstract: Provided is an electrophotographic photosensitive member which is excellent in terms of both continuous reduction of contact stress with contact members and the like and potential stability during repeated use. A charge transport layer which serves as a surface layer of an electrophotographic photosensitive member has a matrix-domain structure including a matrix containing a component [?] (polycarbonate resin D having a specific repeating structural unit) and a charge-transporting substance and domains containing a component [?] (polycarbonate resin A having a repeating structural unit including a specific siloxane moiety).
    Type: Application
    Filed: April 10, 2012
    Publication date: October 18, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Harunobu Ogaki, Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Shio Murai
  • Patent number: 8283433
    Abstract: The present invention is directed to a polycarbonate resin comprising a structural unit represented by the following general formula (I), wherein the structural unit of general formula (I) occupies 5 to 100 mol % relative to all the structural units, and the limiting viscosity of the polycarbonate resin is 0.3 to 2.0 dl/g: wherein in the formula, R1 through R8 independently represent a hydrogen atom, a halogen group, an alkyl group having a carbon number of 1 through 9, an aryl group having a carbon number of 6 through 12, an alkenyl group having a carbon number of 2 through 5, an alkoxy group having a carbon number of 1 through 5, or an aralkyl group having a carbon number of 7 through 17.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: October 9, 2012
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventor: Jun Tajima
  • Publication number: 20120243904
    Abstract: The present invention provides an electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus, each of which has the electrophotographic photosensitive member. In the electrophotographic photosensitive member, a charge transport layer used as a surface layer contains a charge transport material, a polycarbonate resin A which has a specific amount of a specific repeating structural unit of a specific siloxane moiety, and a polyester resin C and/or a polycarbonate resin D, each of which has a specific repeating structural unit. In the charge transport layer, a matrix-domain structure is formed in which a matrix is formed from the charge transport material and the polyester resin C and/or the polycarbonate resin D, and domains are formed in the above matrix from the polycarbonate resin A.
    Type: Application
    Filed: December 2, 2010
    Publication date: September 27, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Tsutomu Nishida
  • Patent number: 8263299
    Abstract: An electrophotographic photoreceptor comprises: an electroconductive support; and a photosensitive layer on the electroconductive support, wherein the photosensitive layer having a dynamic hardness of from 20×109 to 150×109 N/m2 and an elastic deformation ratio of from 15 to 80%.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: September 11, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kaori Iemura, Katsumi Nukada, Hidemi Nukada, Kazuyuki Nakamura
  • Patent number: 8263301
    Abstract: Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: September 11, 2012
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Kathleen M. Carmichael
  • Patent number: 8232030
    Abstract: Present embodiments are directed to the improvement of flexible imaging members used in electrophotography. More particularly, embodiments pertain to a structurally simplified curl-free flexible electrophotographic imaging member without the need for an anticurl back coating, having a functionally improved top outermost exposed slippery imaging layer which furthers extends service life, and provides a process for making and using the member.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: July 31, 2012
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong, Stephen T. Avery
  • Patent number: 8192904
    Abstract: An electrophotographic photoconductor including: an outermost layer, wherein the outermost layer comprises an amino group-containing acryl-modified polyorganosiloxane, wherein the amino group-containing acryl-modified polyorganosiloxane is a copolymer in which a polyorganosiloxane represented by the following structural formula (1) and an acrylic monomer are graft-polymerized
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: June 5, 2012
    Assignees: Ricoh Company, Ltd., Nissin Chemical Industry Co., Ltd.
    Inventors: Kazukiyo Nagai, Hongguo Li, Tetsuro Suzuki, Harukazu Okuda
  • Publication number: 20120058422
    Abstract: Provided is a photoreceptor for electrophotography, a process for producing the photoreceptor, and an electrophotographic apparatus that includes the photoreceptor. The photoreceptor has a photosensitive layer which contains a resin binder that is a copolymerized polyallylate resin. An electrophotographic apparatus having a photoreceptor drum that includes this photoreceptor has a reduced surface frictional resistance throughout the printing period from the beginning to after printing, thus reducing the amount of surface wear while producing satisfactory images.
    Type: Application
    Filed: February 16, 2009
    Publication date: March 8, 2012
    Applicant: FUJI ELECTRIC CO., LTD
    Inventors: Shinjiro Suzuki, Yoichi Nakamura, Seizo Kitagawa, Fengqiang Zhu, Kazuki Nebashi
  • Patent number: 8119249
    Abstract: A silicone resin composition is provided, which includes polysiloxane including (PSA1), (PSA2), (PSB) and (PSC), and a hydrosilylating catalyst, wherein a weight ratio between (PSA2) and (PSA1) (w2/w1) is 0.03-0.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: February 21, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinji Murai, Koji Asakawa
  • Patent number: 8110328
    Abstract: An electrophotographic photoreceptor comprising a conductive support and a photosensitive layer provided on or above the conductive support, the photosensitive layer having an outermost layer comprising a cured product of a composition comprising a curable resin, a surfactant containing a fluorine atom, and a charge transporting organic compound having a specific structure.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: February 7, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada
  • Patent number: 8071267
    Abstract: A photoconductor that includes, for example, a substrate, an optional ground plane layer, an undercoat layer thereover wherein the undercoat layer contains an aminosilane and a phenol polysulfide, a photogenerating layer, and at least one charge transport layer.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: December 6, 2011
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Kathleen M Carmichael, J. Robinson Cowdery-Corvan, David M Skinner, Jean D Van Epps, Jr., Richard A Williams
  • Patent number: 8067137
    Abstract: A photoconductor that includes a supporting substrate, a photogenerating layer, and at least one charge transport layer that contains at least one charge transport component, and a polysiloxane/polyetherimide polymer.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 29, 2011
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8043776
    Abstract: An electrophotographic photoreceptor comprising a conductive support and a photosensitive layer provided on or above the conductive support, the photosensitive layer having an outermost layer comprising a cured product of a composition comprising a curable resin, a surfactant containing a fluorine atom, and a charge transporting organic compound having a specific structure.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: October 25, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada
  • Patent number: 7998646
    Abstract: Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: August 16, 2011
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Kathleen M. Carmichael
  • Publication number: 20110177438
    Abstract: A charge transport layer, which is the surface layer of an electrophotographic photosensitive member, contains a charge transporting material, and a polyester resin A having a repeating structural unit including a specific siloxane moiety and at least one of a polyester resin C having a specific structure and a polycarbonate resin D having a specific structure as a binder resin. The content of the siloxane moiety in the polyester resin A is from 5% by mass or more to 30% by mass or less based on the total mass of the polyester resin A. The charge transport layer includes a domain made of the polyester resin A in a matrix made of the charge transporting material and at least one of the polyester resin C and the polycarbonate resin D.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 21, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazunori Noguchi, Harunobu Ogaki, Shio Murai, Atsushi Ochi, Koji Takahashi