Including Conductive Base Or Support Patents (Class 430/69)
  • Patent number: 10732527
    Abstract: An electrophotographic photoreceptor of a negatively-chargeable laminate-type includes a conductive substrate; a charge generation layer provided on the conductive substrate and including a charge generating material; and a charge transport layer provided on the charge generation layer and containing, as a binder resin, a copolymerized polycarbonate resin having a repeating unit represented by Formula (1); as a hole transporting substance, a compound having a structure represented by Formula (2); as an electron transporting substance, a compound having a structure represented by Formula (3), and, as an antioxidant, a compound represented by Structural Formula (4), where a mass ratio H/(B+H) represents a ratio of mass (H) of the hole transporting substance with respect to a sum of mass (B) of the binder resin and the mass (H) of the hole transporting substance, and satisfies Formula (5), 0.20 by mass?H/(B+H)?0.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: August 4, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Masaru Takeuchi, Hirotaka Kobayashi, Toshiki Obinata, Fengqiang Zhu
  • Patent number: 10626517
    Abstract: An aluminum alloy is described and has compositions with mass percentage content consisting of: 5.0%-5.4% Zn; 0.9%-1.2% Mg; Cu<0.05%; Si<0.05%; Fe<0.1%; Mn<0.05%; Zr<0.1%; Ti<0.05%; other impurities <0.15%; and the remaining composition being Al. An anodizing method of the aluminum alloy described above is described and has: a degreasing treatment, a first black-film stripping treatment, a chemical polishing treatment, a second black-film stripping treatment, an anodizing treatment, a hole filling treatment and a drying treatment which are performed in turn. The aluminum alloy has a higher strength while eliminating an influence of a formed compound phase on a material texture.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: April 21, 2020
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LT
    Inventor: Yuanqing Zeng
  • Patent number: 10168628
    Abstract: A metallic ingot for impact pressing includes a contact surface of the metallic ingot to contact a male mold in impact pressing having a maximum height roughness Rz of 20 ?m to 50 ?m and an average length of a roughness curve element RSm of 150 ?m to 400 ?m, the male mold being to be used in combination with a female mold in the impact pressing.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: January 1, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kenta Shingu, Hiroshi Tamemasa, Daisuke Haruyama
  • Patent number: 10114302
    Abstract: A photoconductor is provided. The photoconductor includes a support, an undercoat layer overlying the support, and a photosensitive layer overlying the undercoat layer. The undercoat layer includes a binder resin and a zinc oxide particle. The photosensitive layer includes a compound represented by the following formula (1): where each of R1 and R2 independently represents an alkyl group or an aromatic hydrocarbon group.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: October 30, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryohta Takahashi, Akihiro Sugino, Eiji Kurimoto, Hidetoshi Kami, Keisuke Shimoyama, Tetsuro Suzuki, Tomoharu Asano, Toshihiro Ishida
  • Patent number: 10025209
    Abstract: A metallic ingot for impact pressing includes a contact surface of the metallic ingot to contact a male mold in impact pressing having a maximum height roughness Rz of 20 ?m to 50 ?m and an average length of a roughness curve element RSm of 150 ?m to 400 ?m, the male mold being to be used in combination with a female mold in the impact pressing.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: July 17, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kenta Shingu, Hiroshi Tamemasa, Daisuke Haruyama
  • Patent number: 10001742
    Abstract: An image forming apparatus includes a transfer belt, a photoconductor drum, and a transmission member. The transfer belt includes a transfer surface. The photoconductor drum faces the transfer surface of the transfer belt in an attachment state where the photoconductor drum is attached to an apparatus main body. The transmission member is attached to a drum end of the photoconductor drum on the insertion direction side and transmits an input rotational driving force to the photoconductor drum. The transmission member includes a flange and a gear. The flange is larger than the photoconductor drum in outer diameter. The gear projects from the flange in the insertion direction with teeth being formed on an outer circumferential surface of the gear, the teeth receiving the rotational driving force. The gear is larger than the photoconductor drum and smaller than the flange in outer diameter.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: June 19, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masahiro Kashimoto
  • Patent number: 9817326
    Abstract: A support, a conductive layer, and an intermediate layer of an electrophotographic photosensitive member have a particular surface profile. The intermediate layer is a cured film containing particles.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: November 14, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuki Yamamoto, Atsushi Fujii, Atsushi Okuda, Yuka Ishiduka, Kazunori Noguchi, Akihiro Maruyama, Nobuhiro Nakamura, Kazuko Sakuma
  • Patent number: 9811010
    Abstract: An electrophotographic photosensitive member includes a conductive base and a single-layer-type photosensitive layer on the conductive base. The photosensitive layer contains a binder resin, a charge generation material, a hole transport material, a fluorine-atom-containing electron transport material, and fluorine-atom-containing resin particles. An amount of the charge generation material in the photosensitive layer is 0.5% by weight or more and less than 2.0% by weight. The charge generation material has a distribution that satisfies Formula (1): 30?a/b in a thickness direction of the photosensitive layer where a and b are as defined in the specification, and b may be 0. The fluorine-atom-containing electron transport material has a distribution that satisfies Formula (2): 30?c/d in the thickness direction of the photosensitive layer where c and d are as defined in the specification, and d may be 0.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: November 7, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuhiro Niida, Kazuyuki Tada, Jiro Korenaga, Yukimi Kawabata
  • Patent number: 9235146
    Abstract: A photoconductor, which contains an electrically conductive support, and at least a photoconductive layer provided over the electrically conductive support, wherein the photoconductive layer contains a compound represented by the following general formula (1): where R1, R2, R3, R4, R5 and R6 are each independently a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an alkoxy group, or an aralkyloxy group; n, a, b, c, and d are each independently an integer of 1 to 4 and m is 1 or 2; and a plurality of R1, R2, R3, R4, R5 or R6 may be the same or different when n, m, a, b, c, or d is an integer of 2 or greater.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: January 12, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventor: Tomoyuki Shimada
  • Patent number: 9040215
    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: Grant
    Filed: January 29, 2013
    Date of Patent: May 26, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masayoshi Nomura, Ryota Arai
  • Patent number: 9023563
    Abstract: An electrophotographic photoreceptor includes a cylindrical conductive substrate that has a thickness of from 0.4 mm to 0.6 mm and a Young's modulus of from 20 GPa to 80 GPa, and a photosensitive layer that is provided on the conductive substrate, wherein an elastic deformation ratio of a layer forming the outermost surface is from 0.35% to 0.47%.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: May 5, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Shinya Yamamoto
  • Patent number: 8980512
    Abstract: An electrophotographic photoreceptor is disclosed. The electrophotographic photoreceptor includes a resin substrate including a carbon nanotube; and a photosensitive layer located overlying the substrate. In addition, a method for producing an electrophotographic photoreceptor is disclosed. The method includes forming a resin substrate by molding a resin forming material including a carbon nanotube; and forming a photosensitive layer overlying the resin substrate.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: March 17, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshiaki Kawasaki, Hongguo Li, Tomohiro Hirade
  • 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: 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
  • Patent number: 8835085
    Abstract: Present embodiments relate generally to the flexible electrostatographic imaging members prepared to comprise a plasticized charge transport layer, plasticized ground strip layer, and a novel plasticized anti-curl back coating layer prepared to have internal stress/strain reduction, superb wear resistance property, and render the resulting flexible imaging members with absolute flatness to meet the functional requirement of electrostatographic imaging apparatuses. More particularly, the embodiments pertain to the reformulation of an anti-curl back coating layer comprising a novel high molecular weight film forming A-B diblock copolymer, a copolyester adhesion promoter, an organic or inorganic particles dispersion, and a plasticizer in the layer's material matrix.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: September 16, 2014
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 8795936
    Abstract: An undercoat layer of an electrophotographic photosensitive member contains a polymer having a specific repeating structural unit in order to provide an electrophotographic photosensitive member that suppresses positive ghost, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: August 5, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunihiko Sekido, Michiyo Sekiya, Akihiro Maruyama, Shinji Takagi, Hideaki Nagasaka
  • 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: 8765341
    Abstract: An electrophotographic photoreceptor includes a conductive substrate, a photosensitive layer that is provided on the conductive substrate, and a surface layer that is provided on the photosensitive layer or is contained in the photosensitive layer, wherein the surface layer is formed of a cured film of a composition including a first reactive charge transport material having a hydroxyl group and a second reactive charge transport material having a methoxy group, and has an elastic deformation ratio R satisfying the following Expression (1): 0.40?R?0.51.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: July 1, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Jiro Korenaga, Daisuke Haruyama
  • Patent number: 8725036
    Abstract: An electrophotographic photoreceptor includes: an electrophotographic photoreceptor body containing a cylindrical electroconductive substrate having openings at both ends in an axial direction, the cylindrical electroconductive substrate having a thickness of approximately 2 mm or more at a center portion in an axial direction and having a socket joint portion on each of inner surfaces of both end portions in an axial direction; and a photosensitive layer provided on an outer surface of the electroconductive substrate; and a support member fit in the openings of the electroconductive substrate, having an fitting portion which has an outer diameter that is larger than a diameter of the opening by a range of from approximately 0.01 mm to approximately 0.1 mm, the fitting portion being press-fit into the opening.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: May 13, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takayuki Yamashita, Isamu Ishiko
  • Patent number: 8722288
    Abstract: [Problems] To provide a novel compound which has a high carrier mobility and is useful as a charge-transporting agent that is not only capable of stably forming a photosensitive layer without precipitating crystals or forming pinholes at the time of forming the photosensitive layer but is also capable of forming an organic photosensitive material for electrophotography that has a high sensitivity and a low residual potential. [Means for Solution] A diphenylnaphthylamine derivative represented by the following general formula (1), wherein R1 to R3 are alkyl groups, k is an integer of 0 to 3, j is an integer of 0 to 4, l is an integer of 0 to 6, and X1 and X2 are hydrocarbon groups having at least one ethylenically unsaturated bond.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: May 13, 2014
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Shigetaka Numazawa, Katsumi Abe, Makoto Koike, Kiyotaka Ihara
  • Patent number: 8685601
    Abstract: An electrophotographic member including an electrically conductive substrate and an electrically conductive resin layer corresponding to a surface layer. The resin layer includes electrically conductive particles and a binder resin.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: April 1, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Nose, Masaaki Harada, Hiroaki Watanabe, Takumi Furukawa, Kenya Terada
  • Patent number: 8679711
    Abstract: An electrophotographic photoreceptor is disclosed, comprising, on an electrically conductive substrate, a photosensitive layer and a surface layer provided sequentially in that order, in which the surface layer is a layer formed by polymerizing a polymerizable compound (I) containing seven to ten functional groups and exhibiting a reactive group equivalent of not more than 140 and not less than 100.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 25, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Morio Osada, Takeshi Ishida, Toshiyuki Fujita, Seisuke Maeda
  • Patent number: 8669030
    Abstract: A photoreceptor including an electroconductive substrate; a photosensitive layer which is located overlying the electroconductive substrate and which is not radically crosslinked; and an outermost layer which is located overlying the photosensitive layer and which includes a radically crosslinked material, wherein the radically crosslinked material includes a unit having a specific formula. An image forming method, an image forming apparatus, and a process cartridge, which use the photoreceptor.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: March 11, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Yukio Fujiwara, Tetsuro Suzuki, Kazukiyo Nagai, Hiroshi Tamura, Hiroshi Ikuno, Hidetoshi Kami
  • Patent number: 8669031
    Abstract: Reduced are interferential streaks in a halftone image, which are produced when using a cylindrical photoreceptor conductive substrate having been subjected to tool bit cutting processing, and provided are an electrophotographic photoreceptor capable of obtaining high image quality in response to a light printing field or the like and an image forming method employing the electrophotographic photoreceptor. Disclosed is an electrophotographic photoreceptor possessing a cylindrical substrate having been finished via cutting processing and provided thereon, a photosensitive layer, wherein among peaks other than at a lag of 0 in a correlogram of a substrate surface profile in a direction along a central axis of the substrate, a mean value from a maximum peak in height to a third peak in height is 0.3-0.8, each of the peaks in height corresponding to an autocorrelation coefficient.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: March 11, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoo Sakimura, Shinchi Hamaguchi, Mayuko Matsusaki, Hisashi Nozaki, Toshiko Nozaki
  • Patent number: 8652717
    Abstract: An image bearing member having an electroconductive substrate, a photosensitive layer overlying the electroconductive layer, and a cross-linked surface layer overlying the photosensitive layer, which contains a cross-linked polymer and a first compound consisting essentially of a nitrogen atom and a phenyl group, biphenyl group, and condensed polycyclic hydrocarbon group, or a second compound consisting essentially of a nitrogen atom and hydrogen atoms, halogen atoms, alkyl groups, alkoxy groups, or aryl groups, substituted or non-substituted alkyl groups, substituted or non-substituted alkoxy groups, substituted or non-substituted aralkyl groups, substituted or non-substituted aryl group, substituted or non-substituted alkylene groups, cyano groups, nitro groups, or —OCO?CH2R16, in which R16 represents a hydrogen atom, a substituted or non-substituted alkyl group, a substituted or non-substituted alkoxy group, or a substituted or non-substituted aryl group.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: February 18, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Shimoyama, Hiroshi Ikuno, Tetsuya Toshine, Tomoharu Asano, Yasuhito Kuboshima, Yuuji Tanaka
  • Patent number: 8652716
    Abstract: Provided is an electrophotographic photoreceptor having a conductive substrate and a photosensitive layer, such that the layer constituting the outermost surface of the photosensitive layer is formed by polymerizing a cross-linkable charge transporting material having a reactive hydroxyl group and a cross-linkable charge transporting material having a reactive alkoxy group, and the ionization potential of the outer surface of the layer constituting the outermost surface is higher by about 0.1 eV or more than the ionization potential of the inner surface of the layer constituting the outermost surface.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: February 18, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masahiro Iwasaki, Jiro Korenaga, Yuko Yamano, Yukimi Kawabata, Daisuke Haruyama
  • Patent number: 8655220
    Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer provided on a surface of the conductive substrate, an outermost layer of the photosensitive layer containing a crosslinked product formed from at least one charge transporting material having at least one substituent selected from the group consisting of —OH, —OCH3, —NH2, —SH, and —COOH and at least one selected from a guanamine compound or a melamine compound, the content of the at least one charge transporting material being at least about 90% by weight, and the content of the at least one selected from the guanamine compound or the melamine compound being from about 0.1% by weight to about 5% by weight.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: February 18, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masahiro Iwasaki, Katsumi Nukada, Wataru Yamada, Kenta Ide, Hirofumi Nakamura, Mitsuhide Nakamura, Koji Bando, Kaori Iemula, Kazuya Hongo, Yasuhiro Nida
  • Patent number: 8652714
    Abstract: The present invention provides an electrophotographic photoconductor including an intermediate layer having sufficient electron transportability and blocking property and capable of suppressing image defects such as fogging and dots. The electrophotographic photoconductor according to the present invention includes a conductive support, a photosensitive layer disposed on the conductive support, and an intermediate layer disposed between the conductive support and the photosensitive layer, wherein the intermediate layer comprises metal oxide particles and a binder resin. The metal oxide particles are surface-treated with an alkoxysilane oligomer represented by the following Formula (1): SinOn-1(OR1)m(OR2)l??Formula (1) wherein R1 and R2 each individually represents a C1-4 alkyl group; n represents an integer of 2 to 20; and m and l each individually represents an integer of 0 or more and satisfies an equation of m+1=2n+2.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: February 18, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Shinichi Hamaguchi, Tomoo Sakimura, Mayuko Matsusaki
  • Publication number: 20140045112
    Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate having a centerline average roughness (Ra) of from 1.0 ?m to 1.7 ?m and a maximum height (Rmax) of from 3.0 ?m to 4.0 ?m as a surface roughness; and a photosensitive layer disposed on the conductive substrate, in which the outermost surface layer contains fluorine-containing particles.
    Type: Application
    Filed: May 8, 2013
    Publication date: February 13, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yoshifumi SHOJI, Takayuki YAMASHITA, Masaru AGATSUMA, Shinya YAMAMOTO, Yuko YAMANO
  • Publication number: 20140045110
    Abstract: An electrophotographic photoreceptor includes a cylindrical conductive substrate that is formed of a metal or an alloy and has an average area of crystal grains of 100 ?m2 or greater; and a photosensitive layer that is provided on the conductive substrate.
    Type: Application
    Filed: February 26, 2013
    Publication date: February 13, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Keiko MATSUKI, Takayuki YAMASHITA, Yoshifumi SHOJI, Mitsuhide NAKAMURA, Yuko YAMANO, Shinya YAMAMOTO
  • Publication number: 20130330104
    Abstract: A photoreceptor includes an electroconductive substrate, and a laminate structure formed of at least a charge generating layer and a charge transport layer and provided overlying the electroconductive substrate, wherein the charge transport layer contains a charge transport material, a compound represented by the following formula 1 and a compound represented by the following formula 2: in the formula 1, R1 and R2 each independently represent substituted or non-substituted alkyl groups or aromatic hydrocarbon groups and one of R1 and R2 represents a substituted or non-substituted aromatic hydrocarbon group, R1 and R2 bonded to the same nitrogen atom may be bonded together to form a substituted or non-substituted nitrogen-containing heterocyclic group, and Ar represents a substituted or non-substituted hydrocarbon group; in the formula 2, R3 and R4 each independently represent substituted or non-substituted alkyl groups or aromatic hydrocarbon groups.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 12, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Keisuke Shimoyama, Akihiro Sugino, Mitsuaki Hirose, Tomoharu Asano, Noboru Toriu, Hideo Nakamori
  • Patent number: 8603710
    Abstract: The presently disclosed embodiments related generally to a layer that provides overall flatness to flexible imaging members and components for use in electrostatographic apparatuses. More particularly, the embodiments pertain to a flexible electrophotographic imaging member belt prepared to include an anti-curl back coating formulated to comprise a mechanically robust copolymer binder that does have enhanced wear resistance and improved imaging member curl control.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: December 10, 2013
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 8603709
    Abstract: A photoconductor that includes a backing layer, a supporting substrate thereover, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, and wherein the backing layer is in contact with the supporting substrate on the reverse side thereof, and the outermost layer of the backing layer is comprised of a polyurethane comprised of a dendritic polyester polyol and a polyisocyanate.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: December 10, 2013
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Publication number: 20130316278
    Abstract: Provided are an electrophotographic photoconductor that satisfies sufficient wear resistance as well as various characteristics as a photoconductor, and that is little affected by harmful gas or the temperature and humidity environment, and a method for producing such an electrophotographic photoconductor. The electrophotographic photoconductor has at least a photosensitive layer on a conductive substrate. The photosensitive layer contains a diadamantyl diester compound represented by Formula (I) (in Formula (I), R1, R2 and R3 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted C1-C6 alkyl group, a substituted or unsubstituted C1-C6 alkoxyl group, a C6-C20 aryl group or a heterocyclic group; l, m and n each represent an integer from 1 to 4; U and W represent a single bond or a substituted or unsubstituted C1-C6 alkylene group; and V represents an OCO group or a COO group).
    Type: Application
    Filed: December 9, 2010
    Publication date: November 28, 2013
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Fengqiang Zhu, Shinjiro Suzuki, Masaru Takeuchi, Quanqiu Zhang
  • Patent number: 8574799
    Abstract: This invention provides an electrophotographic photoreceptor having improved resistance to soiling by a human body-derived substance and a high image stability. The electrophotographic photoreceptor comprises an electroconductie substrate and a photosensitive layer provided on the substrate and is characterized in that the photosensitive layer contains, as a binder resin, a polycarbonate resin comprising constituent units represented by the following formula (A) and the following formula (B), wherein R1 to R4 represent a hydrogen atom, a methyl group or the like; and X represents an alkylene group or the like. 3 to 50% by weight of the total constituent units is accounted for by the constituent units of formula (A) and the intrinsic viscosity is 0.3 to 2 dl/g. [Chemical formula 1] (A)(B).
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: November 5, 2013
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventor: Takahiro Adachi
  • Patent number: 8574797
    Abstract: An electrophotographic photoconductor includes a base, an undercoat layer that contains a metal oxide and an electron-accepting material and has a thickness of about 3 ?m or more and about 15 ?m or less, and a photosensitive layer containing a polymer having a repeating unit represented by general formula (1) where R1 and R2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 5 to 7 carbon atoms, or an aryl group having 6 to 12 carbon atoms; and m and n each independently represent an integer of 0 to 4.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: November 5, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeto Hashiba, Kazuhiro Koseki, Satoya Sugiura, Kenta Ide, Fuyuki Kano
  • Patent number: 8551678
    Abstract: Disclosed is an electrophotographic photosensitive body which does not cause image defects such as black spots and image unevenness when image exposure is performed using light having a wavelength of 350-500 nm, which is so-called short-wavelength light. The electrophotographic photosensitive body is characterized by having at least an intermediate layer, a charge-generating layer containing a metal phthalocyanine pigment and a charge-transporting layer on a conductive supporting body which has a skewness of the profile (Rsk) within the range of ?8<Rsk<0.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: October 8, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Shigeaki Tokutake
  • Publication number: 20130252148
    Abstract: An electrophotographic photoreceptor includes a conductive substrate, a photosensitive layer that is provided on the conductive substrate, and a surface layer that is provided on the photosensitive layer or is contained in the photosensitive layer, wherein the surface layer is formed of a cured film of a composition including a first reactive charge transport material having a hydroxyl group and a second reactive charge transport material having a methoxy group, and has an elastic deformation ratio R satisfying the following Expression (1): 0.40?R?0.51.
    Type: Application
    Filed: September 7, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Jiro KORENAGA, Daisuke HARUYAMA
  • Patent number: 8518617
    Abstract: The present invention provides an electrophotographic photoreceptor including at least an electroconductive substrate and a photosensitive layer provided on or above the electroconductive substrate, wherein an outermost layer of the electrophotographic photoreceptor is a layer composed of a cured film of a composition including at least one of compound having a chain-polymerizable functional group and a charge-transportable backbone in the molecule thereof, a polymerization initiator and a radical deactivator.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: August 27, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tsuyoshi Miyamoto, Wataru Yamada, Takatsugu Doi, Kenya Sonobe, Katsumi Nukada
  • Patent number: 8518616
    Abstract: Reduced can be interferential streaks produced in a halftone image when using a photoreceptor support (also called a drawn tube) having been subjected to tool bit cutting processing, and provided can be an electrophotographic photoreceptor capable of obtaining high quality in response to the light printing field or the like and an image forming method employing the electrophotographic photoreceptor. Also disclosed is an electrophotographic photoreceptor possessing a cylindrical support and provided thereon, a photosensitive layer, the cylindrical support possessing a processing profile regularly formed along a central axis, provided on a circumferential surface of the cylindrical support, wherein the processing profile satisfies Formula 1: Formula 1 ?L?10 ?m, where ?L, represents a difference between a processing period width and another processing period width in a central axis direction of the cylindrical support in an image region.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: August 27, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoo Sakimura, Naoki Nozaki, Teruo Sasaki, Mayuko Ushiro
  • Patent number: 8481238
    Abstract: An electrophotographic photoreceptor is provided which comprises a conductive substrate and a photosensitive layer formed thereover, wherein the photosensitive layer contains at least a polyarylate resin having a repeating structure represented by the following formula [1] and a compound represented by the following formula [6]. This photoreceptor has excellent abrasion resistance under practical load, has high mechanical strength, and further has highly excellent electrical properties.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: July 9, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Rui Zhao, Yuka Nagao, Teruyuki Mitsumori, Tadashi Mizushima, Shunichiro Kurihara, Takayuki Shoda
  • Patent number: 8465893
    Abstract: The presently disclosed embodiments relate generally to the formulation of an anticurl back coating layer that renders imaging apparatus flexible members and components their desirable flatness, for use in electrostatographic, including digital apparatuses. More particularly, the embodiments pertain to an imaging member comprising an anticurl back coating layer formulated to comprise conductive carbon nanotubes dispersion in a polymer blend comprising three film-forming thermoplastic polymers to: (a) render electrical conductivity effect for tribo-electrical charge elimination (b) impart static dissipation capability, and (c) provide surface energy lowering effect for contact friction reduction to ease imaging member belt drive as well as cutting tribo-electrical charge build-up under normal imaging member belt operational conditions in the field.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: June 18, 2013
    Assignee: Xerox Corporation
    Inventors: Edward F. Grabowski, Robert C. U. Yu, Kock-Yee Law, Yuhua Tong
  • Publication number: 20130137024
    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: Application
    Filed: November 29, 2012
    Publication date: May 30, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: CANON KABUSHIKI KAISHA
  • Publication number: 20130101929
    Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an uppermost surface layer thereof is constituted with a cured film of a composition that contains at least two kinds of reactive charge transporting materials selected from a first reactive charge transporting material having an —OH group as a reactive functional group and a second reactive charge transporting material having an —OCH3 group as a reactive functional group, fluororesin particles, and an alkyl fluoride group-containing copolymer having repeating units represented by the following Structural Formulae A and B, and a relative dielectric constant ?r of the uppermost surface layer satisfies the following Formula (1):
    Type: Application
    Filed: April 20, 2012
    Publication date: April 25, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Jiro KORENAGA, Keiko MATSUKI, Masahiro IWASAKI, Mitsuhide NAKAMURA
  • Patent number: 8420283
    Abstract: Provided is a coating liquid for forming an undercoat layer of an electrophotographic photoreceptor exhibiting high stability. In the coating liquid for forming an undercoat layer of an electrophotographic photoreceptor containing metal oxide particles and a binder resin, the metal oxide particles have a cumulative volume average diameter D50 of 0.1 ?m or less and a volume particle size distribution width index SD satisfying the following Expression (1) which are measured by a dynamic light-scattering method in the coating liquid for forming an undercoat layer, 0.010?SD?0.040??(1) where SD=(D84?D16)/2, where D84 represents the particle diameter (?m) at a point of 84% in the cumulative volume particle size distribution curve, and D16 represents the particle diameter (?m) at a point of 16% in the cumulative volume particle size distribution curve.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: April 16, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hiroe Fuchigami, Kozo Ishio
  • Patent number: 8409773
    Abstract: A photoconductor that includes, for example, a substrate; an undercoat layer thereover wherein the undercoat layer contains a metal oxide, and a mixture of an epoxy resin and a carboxyl resin; a photogenerating layer; and at least one charge transport layer.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: April 2, 2013
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Marc J Livecchi, Robert W Hedrick, John J. Wilbert
  • Publication number: 20130052573
    Abstract: Provided is a reactive compound represented by the following General Formula (I): wherein in General Formula (I), F represents a charge transporting skeleton, D represents a group represented by the following General Formula (III), and m represents an integer of from 1 to 8: wherein in General Formula (III), L1 represents a divalent linking group including one or more —C(?O)—O— groups.
    Type: Application
    Filed: March 26, 2012
    Publication date: February 28, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tomoya SASAKI, Katsumi NUKADA, Wataru YAMADA, Takatsugu DOI, Yuko IWADATE, Kenji KAJIWARA
  • 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: 20130022904
    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: Application
    Filed: March 1, 2010
    Publication date: January 24, 2013
    Inventors: Fengqiang Zhu, Yoichi Nakamura, Shinjiro Suzuki
  • Publication number: 20130022903
    Abstract: A photoreceptor including an electroconductive substrate; and a photosensitive layer overlying the electroconductive substrate, wherein the uppermost surface layer of the photosensitive layer has a three-dimensional cross-linked product formed by polymerization reaction of a charge transport compound A represented by the following Chemical Structure 1 and a charge transport compound B having three or more [tetrahydro-2H-pyran-2-yl)oxy]methyl groups linked with aromatic rings in which part of the [tetrahydro-2H-pyran-2-yl)oxy]methyl groups is severed and detached. In the Chemical Structure 1, Ar1 represents an aromatic hydrocarbon group having 6 to 20 carbon atoms that may have an alkyl group having one to four carbon atoms as a substitution group.
    Type: Application
    Filed: July 19, 2012
    Publication date: January 24, 2013
    Inventors: Yuuji TANAKA, Kazukiyo Nagai, Tetsuro Suzuki, Yuusuke Koizuka