Polycyclo Ring System Having The Hetero Ring As One Of The Cyclo Systems Patents (Class 430/78)
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Publication number: 20100203436Abstract: An electrophotographic photoconductor system for use in an electrophotographic device and method of using the same. The electrophotoconductor system comprises an electroconductive support, a charge generation layer disposed on the electroconductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a photosensitive material comprising titanyl phthalocyanine, and at least one oligomeric phenylene additive. The electrophotographic photoconductor system is capable of absorbing light having a wavelength of about 350 nm to about 850 nm.Type: ApplicationFiled: February 11, 2009Publication date: August 12, 2010Inventors: Mark Thomas Bellino, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
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Patent number: 7759031Abstract: A photoconductor comprising an optional supporting substrate, a fluorogallium phthalocyanine containing photogenerating layer, and at least one charge transport layer.Type: GrantFiled: May 24, 2007Date of Patent: July 20, 2010Assignee: Xerox CorporationInventors: Daniel V. Levy, Liang-Bih Lin, Jin Wu
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Patent number: 7747197Abstract: An electrophotographic image forming apparatus, including a photoreceptor, a charger charging the surface of the photoreceptor, an irradiator irradiating the surface of the photoreceptor with imagewise light to form an electrostatic latent image thereon, an image developer developing the electrostatic latent image with a developer including a toner to form a toner image on the surface of the photoreceptor, and a transferer transferring the toner image onto a transfer material, wherein the photoreceptor includes an electroconductive substrate, and a photosensitive layer overlying the electroconductive substrate and including a charge generation material and a specific charge transport material.Type: GrantFiled: September 12, 2006Date of Patent: June 29, 2010Assignee: Ricoh Company, Ltd.Inventors: Keisuke Shimoyama, Eiji Kurimoto
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Patent number: 7727692Abstract: An electrophotographic photoreceptor comprises: an electroconductive support; and a photosensitive layer on the electroconductive support, wherein the photosensitive layer comprises a functional layer, the functional layer comprising: a compound having a triple bond and a hydroxyl group in a molecule; and a cured product of a curable resin.Type: GrantFiled: March 7, 2007Date of Patent: June 1, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Wataru Yamada, Katsumi Nukada
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Patent number: 7727693Abstract: An object of the invention is to provide an electrophotographic photoreceptor showing high responsivity even under a low temperature and low humidity circumstance and capable of compatibilize the decrease of the size and the increase in the image forming speed of an electrophotographic apparatus. In a photosensitive layer of an electrophotographic photoreceptor, oxotitanium phthalocyanine having a crystal form showing a diffraction peak at a Bragg angle 2? (error: 2?±0.2°) of 27.2° in an X-ray diffraction spectrum is contained as a charge generating substance, and an enamine compound represented by the general formula for example, the structural formula (1-1) is contained as a charge transporting substance. Accordingly, the electrophotographic photoreceptor showing high responsivity even under a low temperature and low humidity circumstance is realized.Type: GrantFiled: April 16, 2004Date of Patent: June 1, 2010Assignee: Sharp Kabushiki KaishaInventors: Kazuya Ishida, Akihiro Kondoh, Takatsugu Obata
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Patent number: 7670684Abstract: Coating compositions comprising perfluoroalkyl metallo and non-metallo perfluoro-phthalocyanine compounds and associated coating methods are provided by the present invention. Perfluoroalkyl metallo and non-metallo perfluoro-phthalocyanine compounds are suitable for use as functional coatings and may be optionally combined with conductive polymers. The functional properties imparted generally include one or more of chemical resistance, thermal resistance, biological and chemical non-stick surface behavior, electrochromism, variable electromagnetic field signatures, and/or non-linear optical properties.Type: GrantFiled: February 7, 2006Date of Patent: March 2, 2010Assignee: New Jersey Institute of TechnologyInventor: Sergiu M. Gorun
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Publication number: 20100037955Abstract: A nanoscale pigment particle composition includes an organic benzimidazolone pigment, and a sterically bulky stabilizer compound, wherein the benzimidazolone pigment associates non-covalently with the sterically bulky stabilizer compound that is an alkylated derivative of an aromatic acid; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale pigment particles.Type: ApplicationFiled: October 19, 2009Publication date: February 18, 2010Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADAInventors: Rina CARLINI, Darren Andrew MAKEIFF
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Publication number: 20090245867Abstract: To provide an electrophotographic photoreceptor showing suitable electric characteristics, capable of forming a favorable image even after repeated use for long term and capable of forming a high quality image free from image defects such as a memory phenomenon, an electrophotographic process cartridge using such an electrophotographic photoreceptor, and an image forming apparatus using such an electrophotographic photoreceptor. An electrophotographic photoreceptor comprising a photosensitive layer containing oxytitanium phthalocyanine showing chief diffraction peaks at Bragg angles (2?±0.2°) of 9.6°, 24.1° and 27.2° to CuK? characteristic X-ray (wavelength: 1.Type: ApplicationFiled: October 26, 2006Publication date: October 1, 2009Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Mitsuo Wada, Hiroaki Takamura, Teruyuki Mitsumori, Kazutaka Ida
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Publication number: 20090202274Abstract: A coating fluid for photosensitive-layer formation having high productivity and stability and a process thereof are provided. Also provided are a high-performance electrophotographic photoreceptor and an image-forming apparatus which are capable of forming high-quality images even in various use environments and are less apt to cause image defects such as black spots or color spots. The objects are accomplished with a process for producing a coating fluid which is for forming a photosensitive layer of an electrophotographic photoreceptor and comprises a charge-generating material and a binder resin, wherein a dispersing medium having an average particle diameter in the range of from 1.0 ?m to 350 ?m is used as a dispersing medium for dispersing the charge-generating material in the coating fluid for photosensitive-layer formation. The coating fluid for photosensitive-layer formation produced by this process is preferable as a photosensitive layer of an electrophotographic photoreceptor.Type: ApplicationFiled: May 18, 2007Publication date: August 13, 2009Applicant: Mitsubishi Chemical CorporationInventors: Teruyuki Mitsumori, Kozo Ishio, Hiroe Fuchigami
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Publication number: 20090196654Abstract: An electrophotographic photoreceptor includes an electrically conductive substrate, and a photosensitive layer formed on the electrically conductive substrate, in which the photosensitive layer includes a mixture of a bisphthalocyanine compound represented by a formula and a phthalocyanine compound represented by another formula. The mixture of the bisphthalocyanine compound represented by the formula and the phthalocyanine compound represented by the other formula has higher stability with respect to a transition of crystal type, crystal growth, and/or agglomeration in a photosensitive layer forming composition than a phthalocyanine-based charge generating material. Therefore, the electrophotographic photoreceptor including the mixture as a charge generating material has excellent and stable electrical properties. In addition, the electrophotographic photoreceptor can be prepared with relatively low manufacturing costs.Type: ApplicationFiled: November 21, 2008Publication date: August 6, 2009Applicant: Samsung Electronics Co., LtdInventor: An-kee LIM
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Patent number: 7560203Abstract: An electrophotographic photoconductor that is excellent in the stability of image quality and can realize high durability is provided. In an electrophotographic photoconductor in which an underlying layer, a photoconductive layer, and a crosslinked-type charge transportation layer are stacked on an electrically conductive support in order, the underlying layer is composed of at least two layers being a layer containing an inorganic pigment and a layer including no inorganic pigment, and the crosslinked-type charge transportation layer is formed by curing, at least, a three-or-more-functional radical-polymerizable monomer having no charge transporting structure and a radical-polymerizable compound having one-functional charge transporting structure.Type: GrantFiled: December 1, 2004Date of Patent: July 14, 2009Assignee: Ricoh Company, Ltd.Inventors: Nozomu Tamoto, Tatsuya Niimi, Tetsuro Suzuki, Katsuichi Ohta
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Patent number: 7553593Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the photogenerating layer contains a titanyl phthalocyanine prepared, for example, by dissolving a Type I titanyl phthalocyanine in a solution comprising a trihaloacetic acid and an alkylene halide; adding the mixture comprising the dissolved Type I titanyl phthalocyanine to a solution comprising an alcohol and an alkylene halide thereby precipitating a Type Y titanyl phthalocyanine; and treating the Type Y titanyl phthalocyanine with a monohalobenzene.Type: GrantFiled: June 22, 2006Date of Patent: June 30, 2009Assignee: Xerox CorporationInventors: Jin Wu, Satchidanand Mishra, Kathleen M. Carmichael, Anthony M. Horgan, Kent J. Evans, Geoffrey M T. Foley, Yonn K. Rasmussen, Edward F. Grabowski, Liang-Bih Lin
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Patent number: 7544450Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.Type: GrantFiled: March 19, 2008Date of Patent: June 9, 2009Assignee: Xerox CorporationInventors: Timothy P. Bender, John Graham, James M. Duff
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Patent number: 7527904Abstract: An imaging device including a substrate, a charge generating layer, and a charge transport layer is disclosed. A particular charge generating layer is disclosed that includes porphine, or its derivatives, to facilitate charge generation while suppressing ghosting and improving photoreceptor performance.Type: GrantFiled: December 19, 2005Date of Patent: May 5, 2009Assignee: Xerox CorporationInventors: Jin Wu, Liang-Bih Lin
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Patent number: 7514192Abstract: A photoconductive member component comprising a supporting substrate and thereover a photogenerating layer comprising a tetrahalobenzamidazolebenzene or a bis(tetrahalophenyl)biphenylbisimidazole of the alternative following formulas or dimers thereof wherein each of R1, R2, R3, R4, and R5 are the same or different and are independently selected from the group comprising hydrogen, alkyl, aryl, and halogen, and a charge transport layer component.Type: GrantFiled: December 12, 2005Date of Patent: April 7, 2009Assignee: Xerox CorporationInventors: James McConnell Duff, Timothy P. Bender, Cuong Vong, John F. Graham
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Publication number: 20090087762Abstract: The present invention is an electrophotographic photoconductor having a photosensitive layer on a conductive substrate. The photosensitive layer contains trimellitimide esters additives.Type: ApplicationFiled: September 27, 2007Publication date: April 2, 2009Inventors: David S. Weiss, William T. Gruenbaum, John C. Wilson
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Patent number: 7494754Abstract: An electrophotographic photoreceptor and an electrophotographic imaging apparatus include an asymmetric naphthalenetetracarboxylic acid diimide derivative. The asymmetric naphthalenetetracarboxylic acid diimide derivative has increased solubility in organic solvents and improved compatibility with binder resins, thus providing excellent electron transporting ability. The electrophotographic photoreceptor containing the asymmetric naphthalenetetracarboxylic acid diimide compound according to the present invention can maintain a constant surface potential after being repeatedly used for an extended time. The electrophotographic photoreceptor according to the present invention can provide a high image quality for an extended time.Type: GrantFiled: February 15, 2006Date of Patent: February 24, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Beom-jun Kim, Seung-ju Kim, Saburo Yokota, Kyung-yol Yon, Moto Makino, Ji-Young Lee, Hwan-koo Lee
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Publication number: 20090047589Abstract: Disclosed is an electrophotographic photoreceptor which is excellent in wear resistance and electrical characteristics. Specifically disclosed is an electrophotographic photoreceptor containing a polyester resin in a photosensitive layer provided on an electroconductive substrate. The polyester resin is composed of a copolymer represented by the general formula 1 below, which has a viscosity average molecular weight (Mv) of 10,000-300,000 and contains a diphenyl ether 4,4?-dicarboxylic acid component and a bivalent phenol component. In the general formula 1, A represents a diphenyl ether 4,4?-dicarboxylic acid residue represented by the formula A below, and B represents a bivalent phenol residue represented by the formula B below. In the formula A, each of Ra1 and Ra2 independently represents a hydrogen atom or a monovalent substituent which may have a substituent, and each of n and m is independently an integer from 0 to 4.Type: ApplicationFiled: October 6, 2008Publication date: February 19, 2009Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Hiroyuki TAJIMA, Yuuta Kumano
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Patent number: 7479357Abstract: An organophotoreceptor that includes: (a) a charge transport material having the formula wherein A is selected from heterocyclic groups, naphthyl group, alkylsulfonylphenyl, stilbenyl or the group X, wherein X is represented by the formula B is selected from hydrogen, alkyl group, and an aryl group, with the proviso that when A is naphthyl, B is naphthyl; or where R1 is selected from the group consisting of N-pyrrolyl, N-pyrazolyl, N-tetrazolyl, N-indolyl, N-carbazolyl, N-triazolyl, N-imidazolyl, N-benzimidazolyl, N-indazolyl, and N-benzotriazolyl group, and R3 is a 9-fluorenone group. (b) a charge generating compound; and (c) an electrically conductive substrate.Type: GrantFiled: September 13, 2002Date of Patent: January 20, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katritzky, Ritu Jain, Rexiat Maimait, Anatoliy V. Vakulenko
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Publication number: 20080305419Abstract: The present invention relates to a titanylphthalocyanine represented by the formula (1): comprising a polymorph having a peak at a Bragg angle (2?±0.2°) in X-ray diffraction spectrum with CuK ?-ray: 9.0°, 9.6°, 14.1°, 14.9°, 17.9°, 18.3°, 23.4°, 24.5° and 27.2°; and 1.3<Ir1<1.8; 1.0<Ir2; 1.3<Ir3<2.0; and 0.9<Ir4<1.1 wherein Ir1 is a ratio (9.6°/9.0°) of an intensity of the peak at Bragg angle of 9.6° to an intensity of the peak at Bragg angle of 9.0°; Ir2 is a ratio (14.1°/14.9°) of an intensity of the peak at Bragg angle of 14.1° to an intensity of the peak at Bragg angle of 14.9°; Ir3 is a ratio (17.9°/18.3°) of an intensity of the peak at Bragg angle of 17.9° to an intensity of the peak at Bragg angle of 18.3°; and Ir4 is a ratio (24.5°/23.4°) of an intensity of the peak at Bragg angle of 24.5° to an intensity of the peak at Bragg angle of 23.4°.Type: ApplicationFiled: March 17, 2008Publication date: December 11, 2008Inventors: Kenji Takaki, Yasuhiro Yamasaki
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Publication number: 20080305418Abstract: Provided is a monolayer type photoconductor superior in sensitivity characteristics that allows reliable production by easy confirmation of the sensitivity characteristics, and an image forming device using such a monolayer type photoconductor. A monolayer type photoconductor including a base body and a single photo sensitive layer formed on the base body, the single photo sensitive layer containing a charge generating agent, a hole transfer agent, an electron transfer agent and a binding resin, wherein a maximum absorption wavelength (?max) of the photo sensitive layer is set to a value of below 850 nm and an absorbance (A850) of light at a wavelength of 850 nm per unit thickness of the photo sensitive layer is set to a value of 0.05 ?m?1 or less.Type: ApplicationFiled: March 13, 2008Publication date: December 11, 2008Applicant: Kyocera Mita CorporationInventors: Kazunari Hamasaki, Yuko Iwashita, Daisuke Kuboshima, Keiji Maruo, Shiho Kuboshima
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Publication number: 20080305414Abstract: A photoconductor that, for example, includes a supporting substrate, and a single layer thereover comprised of at least one photogenerating pigment, at least one charge transport component, needle shaped particles with, for example, an aspect ratio of from 2 to about 200, and an optional electron transport compound.Type: ApplicationFiled: June 11, 2007Publication date: December 11, 2008Inventors: Jin Wu, Daniel V. Levy, Liang-Bih Lin, Lin Ma
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Patent number: 7449578Abstract: The present invention provides substituted phenanthroline compounds with high two photon absorption cross sections, as well as substituted phenanthroline compounds which additionally have quenched fluorescence emission upon two photon absorption.Type: GrantFiled: March 23, 2005Date of Patent: November 11, 2008Assignee: The Research Foundation of State University of New YorkInventors: Qingdong Zheng, Paras N. Prasad, Guang S. He
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Patent number: 7449270Abstract: A two-layered electrophotographic photoreceptor is formed. The two-layered electrophotographic photoreceptor includes an electrically conductive substrate and a charge generating layer and a charge transporting layer form on the electrically conductive substrate, wherein the charge generating layer is a naphthalenetetracarboxylic acid diimide derivative represented by: The two-layered electrophotographic photoreceptor has high photosensitivity and low residual potential.Type: GrantFiled: June 12, 2006Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Beom-jun Kim, Seung-ju Kim, Saburo Yokota, Kyung-yol Yon, Moto Makino, Hwan-koo Lee, Ji-uk Kim, Ji-Young Lee
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Patent number: 7446166Abstract: The present invention relates to pyrrole derivatives and photosensitive film using the same and more particularly, the pyrrole derivatives consist of pyrrole units to allow polymerization chemically and electrochemically and a perylene diimide unit to absorb light so that perylene diimide film can be produced by crosslinking the pyrrole units by irradiation of visible light having wavelengths longer than 500 nm and become insoluble in most solvents. Such perylene diimide films can be widely used in the manufacture of electrical, electronical and optical devices such as photo diodes, solar batteries, liquid crystal displays, and luminescent diodes, etc.Type: GrantFiled: October 21, 2005Date of Patent: November 4, 2008Assignee: Industry - University Cooperation Foundation Sogang UniversityInventors: Hoosung Lee, Bongjin Moon, Heung Cho Ko, Woonghyun Choi, Suk-ho Kim
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Publication number: 20080268357Abstract: A phthalocyanine composite with high sensitivity and low environmental dependence is provided. It comprises both a at least one phthalocyanine compound expressed by general formula (1) and a at least one phthalocyanine compound expressed by general formula (2): where, in the general formulae (1) and (2), M1 represents at least one arbitrary atom or atomic group that is capable of binding to a phthalocyanine, M2 represents an atom, or an atomic group containing an atom, selected from the second and subsequent periods of the periodic table and capable of binding to a phthalocyanine, M1 and M2 being different in kind from each other, X1-X4 represent, independently of each other, a halogen atom, and a, b, c, and d represent, independently of each other, an integer between 0 and 4 and satisfy a+b+c+d>1.Type: ApplicationFiled: March 4, 2005Publication date: October 30, 2008Applicant: Mitsubishi Chemical CorporationInventors: Mitsuo Wada, Kazutaka Ida, Akiteru Fujii
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Publication number: 20080254380Abstract: 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: ApplicationFiled: March 24, 2008Publication date: October 16, 2008Applicant: FUJI XEROX CO., LTD.Inventors: Wataru Yamada, Katsumi Nukada, Yukiko Furushiro
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Patent number: 7432029Abstract: An electrophotographic photoreceptor is provided containing a specific asymmetric naphthalenetetracarboxylic acid diimide derivative having a nitro group. An electrophotographic imaging apparatus, an electrophotographic cartridge, and an electrophotographic drum employing the electrophotographic photoreceptor are also provided. The naphthalenetetracarboxylic acid diimide derivative has high solubility in an organic solvent, compatibility with a binder resin, and electron transporting ability. The electrophotographic photoreceptor manufactured using the naphthalenetetracarboxylic acid diimide derivatives has an excellent electrostatic property.Type: GrantFiled: December 29, 2005Date of Patent: October 7, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Seung-ju Kim, Beom-jun Kim, Ji-Young Lee, Saburo Yokota, Kyung-yol Yon, Moto Makino, Hwan-koo Lee
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Patent number: 7427460Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where Ar is an aryl group; X comprises a bond or a linking group; R1, R2, and R3 each comprise H, a carboxyl, an amino group, a halogen, an alkyl group, an acyl group, an alkoxy group, an alkylsulfanyl group, an alkenyl group, an alkynyl group, a heterocyclic group, an aromatic group, or a part of a ring group; R4 comprises H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; and R5, R6, R7, and R8 each comprise an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, a heterocyclic group, or a part of a ring group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.Type: GrantFiled: July 30, 2004Date of Patent: September 23, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Ruta Budreckiene, Gintaras Buika, Vygintas Jankauskas, Juozas V. Grazulevicius, Jonas Sidaravicius, Nusrallah Jubran, Zbigniew Tokarski
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Publication number: 20080199793Abstract: An electrophotographic photoreceptor is provided including an undercoat layer and a photosensitive layer that are sequentially formed on an electrically conductive substrate, wherein the undercoat layer includes a silane compound represented by Formula 1, a metal oxide, and a binder resin, and an electrophotographic imaging apparatus employing the electrophotographic photoreceptor. where R1 to R are each independently a C1-C9 alkyl group, a C1-C9 alkoxy group, a phenyl group, or a phenoxy group. The electrophotographic photoreceptor has excellent electrical properties such as low residual potential and high sensitivity and excellent image quality and stability.Type: ApplicationFiled: December 20, 2007Publication date: August 21, 2008Inventor: An-kee Lim
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Patent number: 7396624Abstract: An electrophotographic photoreceptor containing a naphthalenetetracarboxylic acid diimide derivative of Formula (1), which has a branched alkyl group substituted with an aryl group at the ?-position with regard to nitrogen atoms of imide groups: wherein R1 and R2 are independently selected from the group consisting of a hydrogen atom, a halogen atom, a C1-C20 substituted or unsubstituted alkyl group, and a C1-C20 substituted or unsubstituted alkoxy group; R3 is selected from the group consisting of a C1-C20 substituted or unsubstituted alkyl group, a C1-C20 substituted or unsubstituted alkoxy group, a C7-C30 substituted or unsubstituted aralkyl group, and a group having the formula —(CH2)n—Y—R4; Ar is a C6-C30 substituted or unsubstituted aryl group; Y is an oxygen or sulfur atom; R4 is a hydrogen atom or a C1-C20 substituted or unsubstituted alkyl group; and n is an integer between 1 and 12.Type: GrantFiled: April 1, 2005Date of Patent: July 8, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Beom-jun Kim, Seung-ju Kim, Saburo Yokota, Kyung-yol Yon, Hwan-koo Lee
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Patent number: 7381512Abstract: A hydroxygallium phthalocyanine pigment is characterized by having a maximum peak wavelength within a range of from 810 nm to 839 nm in optical absorption spectrum in a wavelength range of from 600 nm to 900 nm.Type: GrantFiled: August 30, 2004Date of Patent: June 3, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuya Hongo, Kozo Ota, Masahiko Miyamoto, Yukiko Kamijo, Hidemi Nukada, Kenji Inoue
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Publication number: 20080076916Abstract: Processes for making organic photosensitive pigments for charge generating layers of imaging members. The pigments may include titanyl phthalocyanine. The pigments may be synthesized through a partially electrochemical or purely electrochemical process. The pigments may be used in a charge generating layer of an imaging member having a substrate, the charge generating layer, and a charge transfer layer.Type: ApplicationFiled: September 21, 2006Publication date: March 27, 2008Applicant: Xerox CorporationInventors: Liang-bih Lin, William Herbert, Jin Wu, Daniel Levy, Francisco Lopez
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Publication number: 20080026310Abstract: The invention provides an oxo-titanylphthalocyanine crystal which is stable, is superior in dispersibility in a photoreceptive layer and efficiently contributes to improvements in sensitivity and charge retention rate of an electrophotographic photoreceptor when it is used as a charge generating agent, a method for producing the oxo-titanylphthalocyanine crystal, and an electrophotographic photoreceptor.Type: ApplicationFiled: July 10, 2007Publication date: January 31, 2008Inventors: Daisuke Kuboshima, Jun Azuma, Yoshio Inagaki, Junichiro Otsubo, Keiji Maruo
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Patent number: 7320849Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where Y1 and Y2 are, each independently, an arylamine group; R1 and R2 comprise, each independently, H, an alkyl group, an alkenyl group, a heterocyclic group, or an aromatic group; X1 and X2, each independently, are bridging groups; E1 and E2 are, each independently, an epoxy group; and Z is a linking group comprising an alkyl group, an alkenyl group, a heterocyclic group, or an aromatic group; and (b) a charge generating compound. The charge transport materials can be crosslinked to a polymeric bind, either directly or through a crosslinking agent. Corresponding electrophotographic apparatuses and imaging methods are described.Type: GrantFiled: December 31, 2003Date of Patent: January 22, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Nusrallah Jubran, Zbigniew Tokarski, Vytautas Getautis, Tadas Malinauskas, Vygintas Jankauskas, Valentas Gaidelis
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Publication number: 20080014520Abstract: An organic photoreceptor and an electrophotographic image forming apparatus employing the organic photoreceptor are provided, where the organic photoreceptor has high photosensitivity with respect to light radiation at short wavelengths and low exposure potential. Specifically, an organic photoreceptor for short wavelengths having a photosensitive layer including a naphthalene tetracarboxylic acid diimide derivative is formed on an electrically conductive substrate.Type: ApplicationFiled: November 30, 2006Publication date: January 17, 2008Inventors: Beom-jun Kim, Ji-young Lee, Saburo Yokota, Moto Makino
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Publication number: 20080008948Abstract: An imaging member including a substrate; thereover a charge generation layer comprising a thiophosphate; and at least one charge transport layer positioned on the charge generation layer.Type: ApplicationFiled: July 6, 2006Publication date: January 10, 2008Inventors: Jin Wu, Geoffrey M.T. Foley, Satchidanand Mishra, Liang-bih Lin, Anthony M. Horgan, Yonn K. Rasmussen, Kathleen M. Carmichael, Edward F. Grabowski, Markus Rudolf Silvestri
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Publication number: 20080008949Abstract: An imaging member including a substrate; an optional undercoat layer situated on the substrate; an optional adhesive layer situated on the substrate or on the optional blocking layer; a charge generation layer situated on the substrate, on the optional undercoat layer, or on the adhesive layer, the charge generation layer comprising a rylene pigment, a pigment sensitizing dopant having an electron acceptor molecule and an optional binder component; and at least one charge transport layer situated on the charge generation layer.Type: ApplicationFiled: July 6, 2006Publication date: January 10, 2008Inventors: Jin Wu, Linda L. Ferrarese, John J. Wilbert, Liang-bih Lin
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Patent number: 7314692Abstract: A phenylazomethylene-cyclohexadienone derivative and an electrophotographic photoreceptor include a compound that is represented by the following formula: wherein R1 and R2 are independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 20 carbon atom(s), a substituted or unsubstituted alkoxy group having 1 to 20 carbon atom(s), a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, and a halogen; A is selected from the group consisting of nitro group, cyano group and sulfone group; l is a natural number of 0 to 4; m is a natural number of 0 to 4; and n is a natural number of 1 to 5, and the electrophotographic photoreceptor according to the present invention comprises the phenylazomethylene-cyclohexadienone derivative. An electrophotographic photoreceptor having an improved electrical characteristic and a desirable image quality is provided.Type: GrantFiled: October 15, 2004Date of Patent: January 1, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Beom-jun Kim, Saburo Yokota, Kyung-yol Yon, Hwan-koo Lee, Seung-ju Kim
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Publication number: 20070298341Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the photogenerating layer contains a titanyl phthalocyanine prepared, for example, by dissolving a Type I titanyl phthalocyanine in a solution comprising a trihaloacetic acid and an alkylene halide; adding the mixture comprising the dissolved Type I titanyl phthalocyanine to a solution comprising an alcohol and an alkylene halide thereby precipitating a Type Y titanyl phthalocyanine; and treating the Type Y titanyl phthalocyanine with a monohalobenzene.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Inventors: Jin Wu, Satchidanand Mishra, Kathleen M. Carmichael, Anthony M. Horgan, Kent J. Evans, Geoffrey M.T. Foley, Yonn K. Rasmussen, Edward F. Grabowski, Liang-Bih Lin
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Patent number: 7309552Abstract: To provide a highly sensitive and highly durable electrophotographic photoconductor, electrophotography, photographic apparatus and process cartridge for the electrophotographic apparatus which is practical for a high-speed copying machine as well as for a laser printer. The electrophotographic photoconductor includes a photoconductive layer on a conductive support, in which the photoconductive layer contains an azo compound expressed by Formula (1) and wherein at least one of “Cp1” and “Cp2” contains a coupler residue selected from Formula (2), Formula (3) and Formula (4).Type: GrantFiled: September 17, 2004Date of Patent: December 18, 2007Assignee: Ricoh Company, Ltd.Inventors: Yuko Arizumi, Masayuki Shoshi
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Patent number: 7300732Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula, where R comprises a hydrogen, an alkyl group, an alkenyl group, a heterocyclic group, or an aromatic group; X comprises an arylamine group; and Y comprises a 9-fluorenylidene group having at least a solubilizing substituent; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.Type: GrantFiled: February 10, 2004Date of Patent: November 27, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam W. Law
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Patent number: 7297458Abstract: A photoconductive member containing a supporting substrate, a photogenerating layer, and a charge transport layer and wherein the photogenerating layer comprises a photogenerating component, and an electron transport component.Type: GrantFiled: June 29, 2004Date of Patent: November 20, 2007Assignee: Xerox CorporationInventors: Nancy L. Belknap, Andronique Ioannidis, Cindy C. Chen, Lanhui Zhang, James M. Duff, John F. Graham, Timothy P. Bender
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Patent number: 7291429Abstract: Naphthalenetetracarboxylic acid diimide derivatives and an electrophotographic photoconductive material containing the naphthalenetetracarboxylic acid diimide derivatives. The naphthalenetetracarboxylic acid diimide derivatives have a structure represented by the following formula: in which, R1 and R2 are each independently selected from the group consisting of a substituted or non-substituted C1-C20 alkyl group; a substituted or non-substituted C1-C20 alkoxy group; a substituted or non-substituted C6-C30 aryl group; and a substituted or non-substituted C7-C30 aralkyl group; and halogen. The electrophotographic photoconductive material includes the naphthalenetetracarboxylic acid diimide derivatives as an electron transferring material.Type: GrantFiled: June 3, 2004Date of Patent: November 6, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Beom-jun Kim, Saburo Yokota, Kyung-yol Yon, Hwan-koo Lee, Seung-ju Kim
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Patent number: 7291432Abstract: A photoconductive imaging member with linear and proportional collection efficiencies and substantially constant photoinduced characteristics comprised of a supporting substrate, and thereover in, for example, certain weight ratios, a single layer comprised of a mixture of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder, and wherein the photogenerating component is a pigment.Type: GrantFiled: March 23, 2004Date of Patent: November 6, 2007Assignee: Xerox CorporationInventors: Liang-Bih Lin, Surendar Jevadev, Markus R. Silvestri, James M. Markovics, Andronique Ioannidis, Linda L. Ferrarese, John S. Chambers, Anna M. Main
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Publication number: 20070248901Abstract: An electrophotographic photoconductor contains a photosensitive layer and a conductive substrate, wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer containing a charge generating material, an electron transporting material expressed by the General Formula (1) and a hole transporting material expressed by the General Formula (2): wherein R1 and R2 independently represent any one of a hydrogen atom, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group, and R3, R4, R5, R6, R7, R8, R9 and R10 independently represent any one of a hydrogen atom, halogen atom, cyano group, nitro group, amino group, hydroxyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group; and wherein R11, R12, R13, R14, R17, R18, R19 and R20 each represents a hydrogen atom, halogen atom, alkoxy grouType: ApplicationFiled: April 18, 2007Publication date: October 25, 2007Inventors: Keisuke Shimoyama, Eiji Kurimoto, Shinichi Kawamura
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Patent number: 7261987Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where Y comprises an aromatic group; X is a —(CH2)n— group, where n is an integer between 1 and 10, inclusive, and one or more of the methylene groups is optionally replaced by another atom or group; Q1, Q2, and Q3 are, each independently, O, S, or NR; and R, R1, R2, and R3 comprise, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an amino group, an acyl group, an alkoxy group, an alkylsulfanyl group, an aromatic group, or a heterocyclic group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.Type: GrantFiled: July 28, 2004Date of Patent: August 28, 2007Assignee: Samsung Electronics Co., LtdInventors: Nusrallah Jubran, Zbigniew Tokarski
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Patent number: 7245851Abstract: In an electrophotographic apparatus having a blue (purple) semiconductor laser as a light source, the electrophotographic apparatus has an electrophotographic photosensitive member, a charging means, an exposure means, a developing means, a transfer means and a destaticizing means. The exposure means has a semiconductor laser and the destaticizing means having a light-emitting diode, wherein wavelength ?a (nm) of the semiconductor laser, wavelength ?b (nm) of the light-emitting diode and wavelength ?c (nm) at which the electrophotographic photosensitive member has a maximum spectral sensitivity satisfy the following relationship (1): ?a<?c<?b??(1) and any of the ?a, the ?b and the ?c is within the range of from 380 nm to 520 nm.Type: GrantFiled: November 2, 2004Date of Patent: July 17, 2007Assignee: Canon Kabushiki KaishaInventors: Atsushi Fujii, Masato Tanaka, Ryuji Higashi
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Patent number: 7223507Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, charge transport components, and a certain electron transport component, and a certain polymer binder.Type: GrantFiled: April 4, 2003Date of Patent: May 29, 2007Assignee: Xerox CorporationInventors: Andronique Ioannidis, Nancy L. Belknap, Cindy C. Chen, Lanhui Zhang, Timothy P. Bender, John F. Graham, Ah-Mee Hor, James M. Duff
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Patent number: 7220523Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where R1, R2, R3, R4, R5, and R6 comprise, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; X1 and X2 are, each independently, a —(CH2)n— group, where n is an integer between 1 and 10, inclusive; X3 is linking group; and Q1, Q2, Q3, Q4, Q5, and Q6 are, each independently, O, S, NR, NC(?O)R? where R and R? are, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, a heterocyclic group, or an aromatic group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.Type: GrantFiled: June 10, 2004Date of Patent: May 22, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Zbigniew Tokarski, Nusrallah Jubran, Ramunas Lygaitis, Juozas V. Grazulevicius, Edmundas Montrimas, Jonas Sidaravicius