And Specified Charge Generator Layer Patents (Class 430/59.1)
  • Patent number: 10353340
    Abstract: There is provided an electrophotographic photosensitive member in which the variation in potential during repeated use is reduced. The electrophotographic photosensitive member is the electrophotographic photosensitive member of which an undercoat layer comprises a urethane resin and titanium oxide particles whose primary particle and secondary particle diameters are defined.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: July 16, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ikuyo Kuroiwa, Kumiko Takizawa, Tsuyoshi Shimada, Eileen Takeuchi, Wataru Kitamura
  • Patent number: 9952521
    Abstract: A naphthalenedicarboximide derivative is represented by general formula (1) or (2). In general formulas (1) and (2), R1, R2, and R3 each represent, independently of one another, an alkyl group which has a carbon number from 1 to 10 and which may have an aryl group having a carbon number from 6 to 14, an aryl group which has a carbon number from 6 to 14 and which may have an alkyl group having a carbon number from 1 to 10, a cycloalkyl group having a carbon number from 3 to 10, or an alkoxy group having a carbon number from 1 to 6, and m represents an integer from 0 to 4. When m represents an integer of 2 or more, chemical groups R2 may each be the same or may each be different.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: April 24, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hideki Okada
  • Patent number: 9223234
    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 surface modified quantum dots is disclosed.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: December 29, 2015
    Assignee: BROTHER INTERNATIONAL CORPORATION
    Inventors: Farzad Parsapour, Rodney Loyd, Juzo Kuriyama
  • Patent number: 9068083
    Abstract: Provided is a method of producing an electrophotographic photosensitive member having improved sensitivity and capable of outputting an image having less image defects due to a ghost phenomenon not only under a normal-temperature, normal-humidity environment but also under a low-temperature, low-humidity environment as a particularly severe condition. The method of producing a gallium phthalocyanine crystal includes subjecting a gallium phthalocyanine and a specific amine compound, which are added to a solvent, to a milling treatment to perform crystal transformation of the gallium phthalocyanine. In addition, the gallium phthalocyanine crystal is used in the photosensitive layer of the electrophotographic photosensitive member.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: June 30, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masato Tanaka, Masataka Kawahara, Kaname Watariguchi, Takeshi Murakami, Akira Yoshida
  • Publication number: 20150147690
    Abstract: A photoconductor that includes, for example, a supporting substrate, an optional anticurl layer, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, a charge transport layer, and an optional protective coating, and where the photogenerating layer contains a polyarylatecarbonate.
    Type: Application
    Filed: November 23, 2013
    Publication date: May 28, 2015
    Applicant: XEROX CORPORATION
    Inventor: Jin Wu
  • 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: 20150024310
    Abstract: The disclosure provides a flexible electrophotographic imaging member comprising a single novel polymer binder in the formulation of the imaging layers. In particular, the present embodiments provide multi-layered electrophotographic imaging members prepared by using the same polymer binder in the two contiguous imaging formation layers to improve mechanical and photoelectrical performance. The embodiments also include a process for making and using the imaging member.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 22, 2015
    Inventors: ROBERT C.U. YU, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato, J. Robinson Cowdery-Corvan, Dennis J. Prosser
  • Patent number: 8841052
    Abstract: In order to provide an electrophotographic photosensitive member with which a ghost is suppressed even under a low temperature and low humidity environment, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member, the electrophotographic photosensitive member has a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer and comprising a charge generating material and a hole transporting material, wherein the undercoat layer comprises a particular amine compound.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: September 23, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kaname Watariguchi, Takeshi Murakami, Masataka Kawahara, Masato Tanaka, Akira Yoshida
  • Patent number: 8790853
    Abstract: The present disclosure is directed to charge generating compositions and methods of making the charge generating compositions. The composition may comprise one or more polymers comprising styrene units and allyl alcohol units, and one or more photoconductive particles. Electrophotographic devices employing the compositions, including methods of making the devices, are also disclosed.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: July 29, 2014
    Assignee: Xerox Corporation
    Inventors: Jin Wu, John J. Wilbert, Marc J. Livecchi, Liang-bih Lin
  • Patent number: 8785091
    Abstract: A photoconductor that includes, for example, a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, a charge transport layer, and an optional protective coating, and where the charge transport layer contains a mixture of a charge transport component and a polyarylatecarbonate.
    Type: Grant
    Filed: April 13, 2013
    Date of Patent: July 22, 2014
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Kenny-Tuan T Dinh, Terry L Street, Robert W Hedrick, Linda L Ferrarese, Than Sorn, Lanhui Zhang, Lin Ma, Stanley J Pietrzykowski, Jr.
  • 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: 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: 8748069
    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: Grant
    Filed: December 9, 2010
    Date of Patent: June 10, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Fengqiang Zhu, Shinjiro Suzuki, Masaru Takeuchi, Quanqiu Zhang
  • Patent number: 8709688
    Abstract: An oxide material including gallium, zinc and oxygen, a ratio of the number of atoms of zinc to the number of atoms of gallium (number of atoms of zinc/number of atoms of gallium) being from about 0.01 to about 0.6 and a ratio of the number of atoms of oxygen to the sum of the number of atoms of gallium and the number of atoms of zinc (number of atoms of oxygen/(number of atoms of gallium+number of atoms of zinc)) being from about 1.0 to about 1.6, is disclosed. An electrophotographic photoreceptor including a layer which includes the oxide material is also disclosed. An electrophotographic photoreceptor including a substrate; and a photosensitive layer including gallium, oxygen and zinc is also disclosed.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: April 29, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeru Yagi, Takeshi Iwanaga
  • Patent number: 8703371
    Abstract: A charge generating layer of an electrophotographic photosensitive member contains a charge generating substance, polyvinyl acetal, and a fluorenone derivative.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: April 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wataru Kitamura, Kenichi Kaku, Mai Murakami
  • Patent number: 8703372
    Abstract: An electrophotographic photosensitive member includes a support, a charge-generating layer disposed on the support, and a charge-transporting layer disposed on the charge-generating layer, in which the charge-generating layer contains a charge-generating substance and a compound represented by the formula (1). A process cartridge includes the electrophotographic photosensitive member described above. An electrophotographic apparatus includes the electrophotographic photosensitive member described above.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: April 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Murakami, Masataka Kawahara, Kaname Watariguchi, Masato Tanaka, Akira Yoshida
  • Publication number: 20140004453
    Abstract: An electrophotographic photosensitive member has a laminated body, and a hole transporting layer formed on the laminated body, wherein the laminated body is a laminated body having a conductive support, an electron transporting layer and a charge generating layer. When an impedance is measured by forming a circular-shaped gold electrode having a thickness of 300 nm and a diameter of 10 mm on a surface of the charge generating layer of the laminated body by sputtering, and applying an alternating electric field of 100 mV and 0.1 Hz between the conductive support and the gold electrode, the laminated body of the electrophotographic photosensitive member satisfies the following expression (1): R_opt/R_dark?0.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 2, 2014
    Inventors: Kenichi Kaku, Michiyo Sekiya, Kunihiko Sekido, Atsushi Okuda, Nobuhiro Nakamura, Yota Ito, Hiroyuki Tomono, Yuka Ishiduka
  • Patent number: 8617777
    Abstract: An electrophotographic photosensitive member having a support and a photosensitive layer formed on the support, wherein the photosensitive layer contains a boron complex which is a product of the reaction of a compound having a phenolic hydroxyl group and a carbonyl group with a boron halide. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: December 31, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masato Tanaka
  • Patent number: 8568945
    Abstract: An electrophotographic photoreceptor, including a charge generation layer and a charge transport layer on an electroconductive substrate, wherein the charge generation layer includes titanylphthalocyanine and a binder resin which is a crosslinked material of a resin comprising a polyvinylbutyrat site having the following formula (1) and an isocyanate compound having the following formula (2): wherein R1 and R2 independently represent an alkyl group having 1 to 3 carbon atoms; k, l, m and n represent composition ratios and k+1 is from 0.60 to 0.80, wherein k or 1 may be 0, m is from 0.02 to 0.03, and n is from 0.20 to 0.40; wherein A represents a substituted or unsubstituted organic group having 2 to 4 valences; and O represents an integer of from 2 to 4.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: October 29, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiromi Tada, Naohiro Toda, Yuuji Tanaka, Norio Nagayama, Yoshinori Inaba, Takafumi Iwamoto
  • Patent number: 8563204
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a hydroxygallium phthalocyanine, a hydroxyaluminum phthalocyanine, a polymeric binder, and a silanol.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: October 22, 2013
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8507162
    Abstract: An electrophotographic photosensitive member comprises a conductive support, an intermediate layer provided on the conductive support, and a photosensitive layer provided on the intermediate layer, in which at least one of the intermediate layer and the photosensitive layer comprises a compound represented by the following formula (1):
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: August 13, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Maruyama, Kunihiko Sekido, Hideaki Nagasaka, Shinji Takagi
  • Patent number: 8481235
    Abstract: A photoconductor that includes, for example, a supporting substrate, an undercoat layer thereover that contains a metal oxide, a phenolic resin, and a pentanediol ester; a photogenerating layer; and at least one charge transport layer.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: July 9, 2013
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Jin Wu, Nancy L. Belknap, Helen R. Cherniack, Marc J. Livecchi
  • Patent number: 8481240
    Abstract: Disclosed herein is an electrophotographic imaging member comprising a substrate, and a charge generating layer containing a phthalocyanine pigment, a binder, and a solvent. The charge generating layer has a pigment particle separation distance of 28 nm or less after evaporation of the solvent. A coating system, a method of making an electrophotographic imaging member, and a method of printing also are disclosed.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: July 9, 2013
    Assignee: Xerox Corporation
    Inventors: Cindy C. Chen, Lanhui Zhang, Linda L. Ferrarese, James M. Markovics, Marc J. LiVecchi, Edward C. Savage, James R. Backus
  • Patent number: 8450034
    Abstract: Provided is an electrophotographic photoreceptor exhibiting not only excellent durability together with high sensitivity but also excellent image reproduction, which is suitable for an image forming method by which imagewise exposure is performed employing a light source having an emission wavelength peak being in the range of 350-500 nm to form a high density electrostatic latent image on a photoreceptor, and also provided are an image forming method employing the electrophotographic photoreceptor, and an image forming apparatus thereof.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: May 28, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masanori Yumita, Toyoko Shibata, Shinichi Hamaguchi
  • Patent number: 8445168
    Abstract: The present invention provides an electrophotographic photosensitive member including a photoconductive layer, an intermediate layer made of hydrogenated amorphous silicon carbide on the photoconductive layer, and a surface layer made of hydrogenated amorphous silicon carbide on the intermediate layer, wherein a ratio (C/(Si+C); C2) in the surface layer is 0.61 to 0.75, and a sum of atom density of silicon and carbon is 6.60×1022 atoms/cm3 or more, a ratio (C/(Si+C); C1) and a sum (D1) of atom density of silicon and carbon in the intermediate layer increase continuously from the photoconductive layer toward the surface layer without exceeding C2 and D2, and the intermediate layer has a continuous region in which C1 is 0.25 to C2 while D1 is 5.50×1022 to 6.45×1022 atoms/cm3, the region being 150 nm or larger in a layer thickness direction, and an electrophotographic apparatus equipped therewith.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: May 21, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuyoshi Akiyama, Tomohito Ozawa, Daisuke Tazawa, Yuu Nishimura
  • Patent number: 8440377
    Abstract: An electrophotographic photosensitive member includes a substrate, a photoconductive layer, an intermediate layer, and a surface layer sequentially formed. The intermediate layer contains silicon, carbon and hydrogen, and a distribution of a hydrogen ratio, which is a ratio of the number of hydrogen atoms to the number of silicon, carbon and hydrogen atoms, in the intermediate layer has a maximum region. A largest hydrogen atomic ratio in the intermediate layer is larger than a hydrogen atomic ratio in the surface layer, and the hydrogen atomic ratio in the surface layer is 0.30 to 0.45. A distribution of a carbon atomic ratio, which is a ratio of the number of carbon atoms to the number of silicon and carbon atoms, in the intermediate layer has a maximum and a minimum region. A carbon atomic ratio in the maximum region is 0.53 to 0.63, a carbon atomic ratio in the minimum region is 0.47 or more, and the maximum hydrogen region in the intermediate layer is partially superimposed on the minimum carbon region.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: May 14, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohito Ozawa, Motoya Yamada, Kazuyoshi Akiyama, Daisuke Tazawa
  • Patent number: 8415078
    Abstract: The charge generation layer of an electrophotographic photosensitive member is made to contain a specific amine compound in order to provide an electrophotographic photosensitive member that can output images that are practically free from an image flaw or have less image flaws attributable to a ghost phenomenon under low temperature and low humidity environment and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: April 9, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Tanaka, Masaki Nonaka
  • Patent number: 8377615
    Abstract: A photoconductor that includes a supporting substrate, a ground plane layer, a hole blocking layer, an adhesive layer, a photogenerating layer, and at least one charge transport layer of a charge transporting polycarbonate or a mixture of a charge transporting polycarbonate and a second polymer such as a polycarbonate.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: February 19, 2013
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8372566
    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 and a second electroactive segment.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: February 12, 2013
    Assignee: Xerox Corporation
    Inventors: Adrien P. Cote, Matthew A. Heuft
  • Patent number: 8354210
    Abstract: An electrophotographic photoconductor that stabilizes electrical performances and prevents generation of image faults such as memories, irrespective of types of organic materials of resin binder and charge transport material, and variation of temperature and humidity of the operation environment. An electrophotographic photoconductor includes at least a photosensitive layer formed over a conductive substrate, wherein the photosensitive layer contains a cyclohexane dimethanol-diaryl ester compound represented by the formula (I): in formula (I), each of R1 through R10 represents independently, a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group of carbon number of from 1 to 5, a substituted or unsubstituted aryl group, or a substituted or unsubstituted alkoxy group of carbon number of from 1 to 5.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: January 15, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Ikuo Takaki, Yoichi Nakamura, Kazuki Nebashi
  • Patent number: 8304153
    Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer overlying the conductive substrate. The photosensitive layer comprises a phthalimide isoindole derivative having a specific chemical formula.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: November 6, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Ryota Arai
  • Patent number: 8288065
    Abstract: An objective is to provide an organic photoreceptor exhibiting high sensitivity, suitable for exposure to a semiconductor laser having an emission wavelength of 350-500 nm or a light emitting diode, with which generation of memory images as well as image defects caused by very small charge leakage is inhibited, and also to provide an image forming apparatus fitted with the organic photoreceptor. Also disclosed is an organic photoreceptor possessing a charge generation layer and a charge transport layer provided on a conductive substrate, wherein the charge generation layer contains particles made of a condensed polycyclic pigment, having an average major axis length of 500 nm or less, an average aspect ratio of 2.5-5.0, and an aspect ratio variation coefficient of 16% or less.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: October 16, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoo Sakimura, Takeshi Ishida
  • Patent number: 8216752
    Abstract: An objective is to provide an organic photoreceptor exhibiting high sensitivity, suitable for exposure to a semiconductor laser having an emission wavelength of 350-500 nm or a light emitting diode, with which generation of memory images as well as image defects caused by very small charge leakage is inhibited, and also to provide an image forming apparatus fitted with the organic photoreceptor. Also disclosed is an organic photoreceptor possessing a charge generation layer and a charge transport layer provided on a conductive support, wherein the charge generation layer contains particles made of a condensed polycyclic pigment, having an average major axis length of 500 nm or less, an average aspect ratio of 2.5-5.0, and an aspect ratio variation coefficient of 16% or less.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: July 10, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoo Sakimura, Takeshi Ishida
  • Patent number: 8211603
    Abstract: An electrophotographic imaging member includes a substrate, a photogenerating layer, and an optional overcoating layer, where the photogenerating layer includes a chemically functionalized carbon nanotube material.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: July 3, 2012
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, James D. Mayo
  • Patent number: 8163449
    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 a polymer blend of an anti-static polymer and a low surface energy A-B diblock copolymer polymer and an adhesion promoter. The embodiments provide an imaging member belt with the anticurl back coating that is electrically conductive and also substantially reduces its surface contact friction to help suppress/eliminate tribo-electrical charge build-up at the backside of the imaging member belt under normal machine imaging member belt operational conditions in the field.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: April 24, 2012
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Edward F. Grabowski, Yuhua Tong
  • Patent number: 8158314
    Abstract: An object of the present invention is to form a high density electrostatic latent image on an organic photoreceptor via image exposure using a semiconductor laser or a light-emitting diode of an oscillation wavelength of 350-500 nm; and to provide an organic photoreceptor exhibiting improved sensitivity and repetition characteristics or improved dot reproducibility deterioration, and an image forming apparatus employing the organic photoreceptor. In an organic photoreceptor having a charge generating layer and a charge transporting layer on a conductive support, an organic photoreceptor wherein a charge generating layer incorporates a binder resin and a Br substituted pyranthrone-based compound and the spectral spectrum of the charge generating layer has maximum absorption values each in the region of 430-445 nm, 500-510 nm, and 530-545 nm.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: April 17, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoko Sakimura, Toyoko Shibata, Shinichi Hamaguchi
  • Patent number: 8153341
    Abstract: A photoconductor that includes, for example, a supporting substrate, an undercoat layer thereover wherein the undercoat layer contains a metal oxide, a phenolic resin, and a phosphate; a photogenerating layer; and at least one charge transport layer.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: April 10, 2012
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Jin Wu, Nancy L Belknap, Helen R Cherniack, Marc J Livecchi
  • Patent number: 8129083
    Abstract: An electrophotographic photoreceptor is disclosed, comprising on or over an electrically conductive support a photosensitive layer containing a charge generation material and a charge transfer material, wherein the charge generation material is comprised of two or more compounds represented by the following formula wherein X and Y are each an alkyl group or a halogen atom, n is an integer of 1 to 6 and m is an integer of 0 to 6, and wherein the compounds differ in at least one of m and n of the formula.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: March 6, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoko Sakimura, Toyoko Shibata, Fumitaka Mochizuki, Shinichi Hamaguchi, Masanori Yumita
  • Publication number: 20120052428
    Abstract: A photoconductor that includes, for example, a supporting substrate, an undercoat layer thereover that contains a metal oxide, a phenolic resin, and a pentanediol ester; a photogenerating layer; and at least one charge transport layer.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 1, 2012
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Jin Wu, Nancy L. Belknap, Helen R. Cherniack, Marc J. Livecchi
  • Patent number: 8119316
    Abstract: A photoconductor comprising a 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 thiuram sulfide additive.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: February 21, 2012
    Assignee: Xerox Corporation
    Inventors: Liang-Bih Lin, Daniel V Levy, Jin Wu, Markus R Silvestri
  • Patent number: 8110327
    Abstract: A photoconductor that includes a first 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 first layer is in contact with the supporting substrate on the reverse side thereof, and which first layer includes a fluorinated nano diamond component.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: February 7, 2012
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Edward F. Grabowski, Lanhui Zhang, Lin Ma
  • Publication number: 20120028180
    Abstract: A photoconductor that includes a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, and at least one charge transport layer, and where the charge transport layer contains a spirodilactam based polycarbonate.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 2, 2012
    Applicant: XEROX CORPORATION
    Inventor: Jin Wu
  • Patent number: 8105739
    Abstract: An electrophotographic photoreceptor includes a conductive support and a photosensitive layer. The photosensitive layer is disposed on the conductive support, and includes a layer that includes, in the same layer, at least a charge generating material and a compound having a triple bond and a hydroxy group.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: January 31, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Yukiko Furushiro
  • Patent number: 8105740
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein the photogenerating layer contains a vulcanized fatty ester.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: January 31, 2012
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Publication number: 20120003576
    Abstract: The charge generation layer of an electrophotographic photosensitive member is made to contain a specific amine compound in order to provide an electrophotographic photosensitive member that can output images that are practically free from an image flaw or have less image flaws attributable to a ghost phenomenon under low temperature and low humidity environment and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member.
    Type: Application
    Filed: June 3, 2011
    Publication date: January 5, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masato Tanaka, Masaki Nonaka
  • Patent number: 8088542
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, a charge transport layer, and an overcoat layer that contains a titanocene.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: January 3, 2012
    Assignee: Xerox Corporation
    Inventors: Jin Wu, John F. Yanus, Kenny-Tuan Dinh, Kent J Evans, Min-Hong Fu, Susan M. Vandusen
  • Publication number: 20110318679
    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: Application
    Filed: June 25, 2010
    Publication date: December 29, 2011
    Applicant: XEROX CORPORATION
    Inventor: Jin Wu
  • Patent number: 8076047
    Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer formed by laminating a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material in this order, on a conductive support, wherein the charge generation layer contains an oxotitanylphthalocyanine as the charge generation material and metal oxide microparticles, and the electrophotographic photoreceptor has photosensitive properties in light source of wavelength range from 360 to 420 nm.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: December 13, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kotaro Fukushima, Kohichi Toriyama
  • Patent number: 8067138
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein at least one of the charge transport layer and the photogenerating layer contains a pyrrole.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: November 29, 2011
    Assignee: Xerox Corporation
    Inventor: Jin Wu