Arylamine Containing Patents (Class 430/58.65)
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Publication number: 20080032216Abstract: A photoconductor containing a substrate, an undercoat layer thereover wherein the undercoat layer includes, for example, a polyol resin, an aminoplast resin, a polymeric phosphate ester adhesion component, and a metal oxide; and at least one imaging layer, such as a photogenerating and charge transport layer, formed on the undercoat layer.Type: ApplicationFiled: August 1, 2006Publication date: February 7, 2008Inventors: Daniel V. Levy, Jin Wu, Liang-Bih Lin, Francisco J. Lopez
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Publication number: 20080032220Abstract: A photoconductor containing a substrate, a layer thereover, which layer contains, for example, a polyol resin, an aminoplast resin, a silicone free polyester, and a metal oxide dispersed therein; and at least one imaging layer formed on the polyol resin containing layer.Type: ApplicationFiled: August 1, 2006Publication date: February 7, 2008Inventors: Daniel V. Levy, Jin Wu, Liang-Bih Lin, Francisco J. Lopez
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Publication number: 20080032218Abstract: A photoconductor containing a substrate, an undercoat layer thereover comprising a polymeric resin, a silanol, and a metal oxide; and a photogenerating layer; and at least one charge transport layer.Type: ApplicationFiled: August 1, 2006Publication date: February 7, 2008Inventors: Jin Wu, Daniel V. Levy, Geoffrey M.T. Foley, Liang-Bih Lin
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Publication number: 20080026308Abstract: A photoconductive having an overcoat layer that includes a cured or substantially crosslinked product of at least a melamine-formaldehyde resin and a charge transport compound, and an optional phenol compound.Type: ApplicationFiled: July 25, 2006Publication date: January 31, 2008Applicant: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu
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Patent number: 7312008Abstract: An imaging member includes a substrate, a charge generating layer, and a charge transport layer, wherein an external of the imaging member includes a polyhedral oligomeric silsesquioxane modified silicone dispersed therein.Type: GrantFiled: February 10, 2005Date of Patent: December 25, 2007Assignee: Xerox CorporationInventors: Jin Wu, Yuhua Tong, John J. Wilbert, Liang-bih Lin, Jennifer Y. Hwang, Timothy J. O'Brien, Anthony Uttaro, Jr., Linda L. Ferrarese
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Publication number: 20070275314Abstract: The present invention provides a diphenyl amine derivative having the excellent solubility to a solvent and compatibility to a binding resin, an efficient production method therefor, and an electrophotographic photoconductor having the excellent sensitivity, capable of effectively preventing generation of the black dots. A diphenyl amine derivative represented by the following general formula (1) is used: (In the general formula (1), R1 to R12 each are a hydrogen atom, an alkyl group which may have a substituent, or the like, Z is a ring structure linked with a benzene ring, which is a 4 to 8-membered ring including a hydrogen atom, a nitrogen atom, an oxygen atom, a carbon atom or a sulfur atom, m1, m2, n1, n2 each are 0 or 1, m1+n1 is 1 or 2, and m2+n2 is 1 or 2.Type: ApplicationFiled: April 26, 2007Publication date: November 29, 2007Inventor: Hideki Okada
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Patent number: 7300731Abstract: The present invention relates to new a charge transport layer that includes first charge transport material which is spatially doped with a second charge transport material. The charge transport layer may either be a hole or electron transport layer and is useful in organic electronic devices.Type: GrantFiled: August 10, 2004Date of Patent: November 27, 2007Assignee: E.I. du Pont de Nemours and CompanyInventor: Ying Wang
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Patent number: 7291428Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.Type: GrantFiled: December 15, 2006Date of Patent: November 6, 2007Assignee: Xerox CorporationInventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
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Patent number: 7267917Abstract: A charge transport layer composition for a photoreceptor includes at least a binder, at least one arylamine charge transport material, e.g., N,N?-diphenyl-N,N?-bis(3-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, and at least one polymer containing carboxylic acid groups or groups capable of forming carboxylic acid groups. The charge transport layer forms a layer of photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.Type: GrantFiled: September 21, 2004Date of Patent: September 11, 2007Assignee: Xerox CorporationInventors: Yuhua Tong, Kenny-Tuan T. Dinh, Markus R. Silvestri, Michael E. Zak, John F. Yanus, Min-Hong Fu, David M. Skinner, Kathleen M. Carmichael, Colleen A. Helbig, Dale S. Renfer, John A. Bergfjord, Sr., Susan M. Van Dusen, Anthony M. Horgan, Jin Wu, Steven M. Sterling
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Patent number: 7258958Abstract: An organic photoconductor, comprises a conductive base, a charge generating lager and a charge transport layer, wherein the charge generating lager and the charge transport layer are provided in this order on the conductive base, wherein when a curve is drawn by plotting integrated-values of a detected current in terms of time in measurement of transient photocurrent by TOF (time of flight) measurement with an electric field intensity of 10V/?m , crossing angle ? of two tangent lines tangent to the curve is 15° to 45°; and the charge transport lager has a film thickness of 20 to 35 ?m.Type: GrantFiled: June 15, 2004Date of Patent: August 21, 2007Assignee: Konica Minolta Business Technologies, Inc.Inventors: Akihiko Itami, Kazuhisa Shida
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Patent number: 7244485Abstract: A seamed flexible belt having a substrate and a seam having interlocking seam members, wherein the interlocking seam members are held together by an adhesive having polyamide and an optional electrically conductive filler, for use in electrostatographic, contact electrostatic, digital and other like printing machines.Type: GrantFiled: April 11, 2001Date of Patent: July 17, 2007Assignee: Xerox CorporationInventors: Ralph A. Mosher, T. Edwin Freeman, Theodore Lovallo, Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri, Gerald M. Fletcher, Antonio DeCrescentis, Ihor W. Tarnawskyj
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Patent number: 7232634Abstract: A charge transport layer for an imaging member comprising a charge transport material with a nitrogen molecular defense system not exhibiting early onset of charge transport layer fatigue cracking. The nitrogen molecular defense system includes attaching bulky organic groups to charge transport materials. The bulky groups aid in preventing recrystallization of the charge transport molecule and shield the nitrogen from molecular attack, such as by oxidation. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and outstanding print quality.Type: GrantFiled: September 30, 2004Date of Patent: June 19, 2007Assignee: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Sean X. Pan, John F. Yanus, Alexander N. Klymachyov, Min-Hong Fu, Dennis J. Prosser, Susan M. VanDusen
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Patent number: 7192678Abstract: A charge transport layer composition for a photoreceptor includes at least a binder and a charge transport material of about 100% to about 40% by weight of a total of the charge transport layer N,N-dimethylphenyl)-4-biphenylamine and about 0% to about 60% N,N?-dephenyl-N,N?-bis(3-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, and wherein the total charge transport material in the composition is 48% or less of the total solids of the composition. The charge transport layer forms a layer of a photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.Type: GrantFiled: July 13, 2004Date of Patent: March 20, 2007Assignee: Xerox CorporationInventors: Yuhua Tong, Kenny-Tuan T. Dinh, Markus R. Silvestri, Michael E. Zak, John F. Yanus, Min-Hong Fu, David M. Skinner, Kathleen M. Carmichael, Colleen A. Helbig, Dale S. Renfer, John A. Bergfjord, Sr., Susan M. Van Dusen
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Electrophotographic photoreceptor, electrophotographic process cartridge and image forming apparatus
Patent number: 7175955Abstract: An electrophotographic photoreceptor comprising a conductive substrate, and at least one layer, which contains a polymeric compound having a repeating unit selected from repeating units represented by the following general formulas (I) to (III), provided on the conductive substrate, as well as an electrophotographic process cartridge and an image forming apparatus using the electrophotographic photoreceptor. In general formulas (I) to (III), R1a and R1b each independently represent an alkylene group, X represents an arylene group or an alkylene group, Y represents a divalent aromatic group, and n represents a repeating unit number.Type: GrantFiled: December 29, 2003Date of Patent: February 13, 2007Assignee: Fuji Xerox Co., Ltd.Inventors: Kenji Yao, Masahiro Iwasaki, Katsumi Nukada -
Patent number: 7166396Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and thereover a charge transport layer comprised of a charge transport component or components, a polymer binder and metal oxide particles, wherein said metal oxide particles contain or are attached with or to a silane or a siloxane, or alternatively a polytetrafluoroethylene.Type: GrantFiled: April 14, 2004Date of Patent: January 23, 2007Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, John F. Graham, Liang-Bih Lin, Cuong Vong
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Patent number: 7125633Abstract: An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transport layer comprises a lower concentration of different charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the second (top) charge transport layer is a high mobility hole transport compound. The charge transport compound in each layer is dissolved or molecularly dispersed in an electrically inactive film forming polymer to form a solid solution. In such a construction, the resulting dual charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: GrantFiled: December 12, 2003Date of Patent: October 24, 2006Assignee: Xerox CorporationInventors: Satchidanand Mishra, Houy Jen Yuh, Anthony M. Horgan, Markus R. Silvestri, Robert C. Yu, Yuh Tong, Dale Renfer, Kenny-tuan Dinh, Geoff Foley, Jack Yanus, Timothy Fuller
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Patent number: 7115347Abstract: 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, and R4 comprise, each independently, an alkyl group, an alkenyl group, an aromatic group, a heterocyclic group, or a part of a ring group; X and X? comprise, each independently, an aromatic group; Y and Y? comprise, each independently, a (disubstituted)methylene group; and Z is a linking group; (b) a charge generating compound; and (c) an electrically conductive substrate on which said charge transport material and said charge generating compound are located. Corresponding electrophotographic apparatuses and imaging methods are also described.Type: GrantFiled: January 16, 2004Date of Patent: October 3, 2006Assignee: Samsung Electronics Co., LTDInventors: Zbigniew Tokarski, Nusrallah Jubran, Vytautas Getautis, Valentas Gaidelis, Maryte Daskeviciene, Edmundas Montrimas, Ingrida Paulauskaite, Jonas Sidaravicius
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Patent number: 7115345Abstract: According to the present invention is an electrophotographic imaging member which is a thin dual layer structure comprising a top layer of a durable and wear-resistant layer and a bottom layer which is bipolar. The electrophotographic imaging member of the invention may be top surface charge generating or bottom surface charge generating and in either case has an overall negative charging mode of operation.Type: GrantFiled: February 17, 2004Date of Patent: October 3, 2006Assignee: Xerox CorporationInventors: Andronique Ioannidis, Timothy J. Fuller, Nancy L. Belknap, Markus R. Silvestri, Cindy C. Chen, Timothy P. Bender, John F. Graham, James M. Duff, Kenny-Tuan T. Dinh, John F. Yanus, James M. Markovics, Lanhui Zhang
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Patent number: 7078139Abstract: An electrophotographic photoreceptor for wet development including an electrically conductive substrate, and an organic photosensitive layer formed on the electrically conductive substrate, wherein a surface layer of the organic photosensitive layer includes at least a binder resin comprising a polymer compound and a charge transport material comprising a low molecule compound, the surface layer having an oxygen gas permeation coefficient of 5×10?13 cm3 (STP)*cm/s*cm2*cmHg or less. The electrophotographic photoreceptor has high durability for liquid developer used in a wet development technique and can produce good image characteristics.Type: GrantFiled: October 8, 2003Date of Patent: July 18, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Saburo Yokota, Hwan-koo Lee, Kyung-yoi Yon
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Patent number: 7037631Abstract: A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, allyl glycidyl ether, hydroxy containing polymer.Type: GrantFiled: February 19, 2003Date of Patent: May 2, 2006Assignee: Xerox CorporationInventors: Jin Wu, Liang-Bih Lin, John S. Chambers
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Patent number: 7033714Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: GrantFiled: December 16, 2003Date of Patent: April 25, 2006Assignee: Xerox CorporationInventors: Anthony M. Horgan, Robert C Yu, Satchidanand Mishra, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
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Patent number: 7018756Abstract: A photoconductive imaging member is disclosed comprising a charge generation layer and a charge transport layer comprising an oxidative inhibitor. An electrophotographic imaging process using the imaging member of the invention is also described.Type: GrantFiled: September 5, 2003Date of Patent: March 28, 2006Assignee: Xerox CorporationInventors: Damodar M. Pai, Kent J. Evans, Kathleen M. Carmichael, Colleen A. Helbig, John F. Yanus, Yuhua Tong, Timothy J. Fuller, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch
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Patent number: 7005222Abstract: An imaging member having a charge transport layer with multiple regions is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein at least the top or uppermost transport layer comprises a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be of the same or different compounds from that included in the top or additional charge transport layer(s). The charge transport compound present in each layer may be dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: GrantFiled: December 16, 2003Date of Patent: February 28, 2006Assignee: Xerox CorporationInventors: Anthony M. Horgan, Satchidanand Mishra, Robert C. Yu, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
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Patent number: 6994941Abstract: An electrophotographic photosensitive member is provided having a support and a photosensitive layer provided on the support and containing at least one kind of charge-transporting material which has a specific structure with a molecular weight of from 1,500 to 4,000, and is held in a proportion of from 90% by weight to 100% by weight based on the total weight of the charge-transporting material.Type: GrantFiled: August 28, 2003Date of Patent: February 7, 2006Assignee: Canon Kabushiki KaishaInventors: Takakazu Tanaka, Itaru Takaya, Yuka Ishiduka, Harunobu Ogaki, Kenichi Kaku
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Patent number: 6991880Abstract: A member including for example, a substrate, a charge generating layer, a charge transport layer comprising a poly(phenylsilsesquioxane), molecule, and a film forming binder.Type: GrantFiled: July 23, 2002Date of Patent: January 31, 2006Assignee: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Sean X. Pan, John F. Yanus, Cindy C. Chen, Min-Hong Fu, Dennis J. Prosser, Susan M. VanDusen
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Patent number: 6969573Abstract: An electrostatographic article including: a substrate; a charge generator layer overcoated on the substrate and which layer is sensitive to blue light; and a charge transport layer overcoated on the charge generator layer and which charge transport layer is transparent to blue light.Type: GrantFiled: June 28, 2002Date of Patent: November 29, 2005Assignee: Xerox CorporationInventors: Timothy P. Bender, John F. Graham
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Patent number: 6958204Abstract: An electrophotographic photosensitive member includes a charge generating material and a charge transfer material. The charge transfer material contains a triarylamine compound synthesized from an amine compound and an aryl halide in the presence of a catalyst comprising a phosphine compound represented by formula (1) and a palladium compound: wherein Ar1 to Ar3 are each independently an alkyl or aryl group which may have a substituent group, and at least one of Ar1 to Ar3 is an aryl group. A process cartridge includes the electrophotographic photosensitive member.Type: GrantFiled: August 25, 2004Date of Patent: October 25, 2005Assignee: Canon Kabushiki KaishaInventors: Takakazu Tanaka, Mitsuhiro Kunieda, Yuka Nakajima, Harunobu Ohgaki
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Patent number: 6946225Abstract: A multi-active electrophotographic charge generation element comprises a conductive support, a charge generation layer (CGL) disposed on the conductive support, and a charge transport layer (CTL) disposed on the charge generation layer. The charge generation layer (CGL) includes a charge-generation material comprising an aggregated or crystalline form of a first dye or pigment and a first polymeric binder. The charge transport layer (CTL) comprises at least one charge-transport agent, a second dye or pigment having absorption in a selected spectral region that at least partially overlaps the absorption of a dissolved non-aggregated or non-crystalline form of the first dye or pigment, and a second polymeric binder. The second dye or pigment in the charge transport layer absorbs radiation in the selected spectral region that is incident on the charge transport layer, thereby shielding the charge generation layer from that radiation and mitigating visible radiation-induced photofatigue.Type: GrantFiled: July 22, 2002Date of Patent: September 20, 2005Assignee: Eastman Kodak CompanyInventors: Albert V. Buettner, Dennis R. Fronheiser, Anne F. Lairmore, David S. Weiss, Jeffrey R. Murray, Marie B. O'Regan
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Patent number: 6861188Abstract: Electrophotographic photoreceptor having a photosensitive layer containing an amino compound selected from formulae 1 to 22 in the specification.Type: GrantFiled: September 6, 2002Date of Patent: March 1, 2005Assignee: Ricoh Company LimitedInventors: Takaaki Ikegami, Yasuo Suzuki, Tomoyuki Shimada, Nozomu Tamoto, Hidetoshi Kami
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Publication number: 20040265717Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:Type: ApplicationFiled: January 16, 2004Publication date: December 30, 2004Inventors: Zbigniew Tokarski, Nusrallah Jubran, Vytautas Getautis, Valentas Gaidelis, Maryte Daskeviciene, Edmundas Montrimas, Ingrida Paulauskaite, Jonas Sidaravicius
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Publication number: 20040265716Abstract: An organic photoconductor, comprises a conductive base, a charge generating lager and a charge transport layer, wherein the charge generating lager and the charge transport layer are provided in this order on the conductive base, wherein when a curve is drawn by plotting integrated-values of a detected current in terms of time in measurement of transient photocurrent by TOF (time of flight) measurement with an electric field intensity of 10V/&mgr;m , crossing angle &thgr; of two tangent lines tangent to the curve is 15° to 45°; and the charge transport lager has a film thickness of 20 to 35 &mgr;m.Type: ApplicationFiled: June 15, 2004Publication date: December 30, 2004Inventors: Akihiko Itami, Kazuhisa Shida
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Patent number: 6835512Abstract: An electrophotographic photosensitive member is disclosed in which a photosensitive layer and a protective layer are formed on a conductive substrate in that order. In this photosensitive member, when its surface is charged to −700 V under a 23° C./5% RH environment and irradiated with white light in a light quantity of 10 lux·sec, if the surface potential at the time 0.2 seconds have passed from the irradiation and the surface potential at the time 0.5 seconds have passed from the irradiation are defined as Vsl(0.2) and Vsl(0.5), respectively, the absolute value of Vsl(0.2) and the absolute value of Vsl(0.2)−Vsl(0.5) satisfy specific conditions.Type: GrantFiled: December 19, 2002Date of Patent: December 28, 2004Assignee: Canon Kabushiki KaishaInventors: Yosuke Morikawa, Tatsuya Ikezue, Kouichi Nakata, Kimihiro Yoshimura, Daisuke Tanaka
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Patent number: 6818368Abstract: An electrophotographic photosensitive member includes a charge generating material and a charge transfer material. The charge transfer material contains a triarylamine compound synthesized from an amine compound and an aryl halide in the presence of a catalyst comprising a phosphine compound represented by formula (1) and a palladium compound: wherein Ar1 to Ar3 are each independently an alkyl or aryl group which may have a substituent group, and at least one of Ar1 to Ar3 is an aryl group. A process cartridge includes the electrophotographic photosensitive member.Type: GrantFiled: April 12, 2001Date of Patent: November 16, 2004Assignee: Canon Kabushiki KaishaInventors: Takakazu Tanaka, Mitsuhiro Kunieda, Yuka Nakajima, Harunobu Ohgaki
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Patent number: 6806009Abstract: In an electrophotographic photosensitive member comprising a cylindrical support, and provided thereon a photosensitive layer and a protective layer in this order, which cylindrical support has an outer diameter of less than 30 mm, the difference between a coefficient of thermal expansion &agr;1 measured from the top of the protective layer and a coefficient of thermal expansion &agr;2 measured after the protective layer has been removed, |&agr;1−&agr;2|, is more than 5.0×10−7° C.−1 to less than 1.0×10−4° C.−1, and the modulus of elastic deformation We % measured from the top of the protective layer is more than 30% to less than 60%. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.Type: GrantFiled: December 9, 2002Date of Patent: October 19, 2004Assignee: Canon Kabushiki KaishaInventors: Daisuke Tanaka, Yosuke Morikawa, Tatsuya Ikezue, Kouichi Nakata, Kimihiro Yoshimura
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Patent number: 6790574Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), and at least one polycarbonate resin of the formula (4) and/or an organic additive containing at least one atom selected from the group consisting of nitrogen, oxygen, phosphorus and sulfur for an electrophotographic photoreceptor.Type: GrantFiled: September 26, 2002Date of Patent: September 14, 2004Assignee: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Chieko Inayoshi, Masaki Ohkubo, Mitsutoshi Anzai, Yasuo Murakami
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Publication number: 20040161683Abstract: A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, allyl glycidyl ether, hydroxy containing polymer.Type: ApplicationFiled: February 19, 2003Publication date: August 19, 2004Applicant: Xerox CorporationInventors: Jin Wu, Liang-Bih Lin, John S. Chambers
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Publication number: 20040161682Abstract: A photoconductive imaging member containing a hole blocking layer, a photogenerating layer, a charge transport layer, and thereover an overcoat layer comprised of a polymer With a low dielectric constant and charge transport molecules.Type: ApplicationFiled: February 19, 2003Publication date: August 19, 2004Applicant: Xerox CorporationInventors: Jin Wu, Markus R. Silvestri, Liang-Bih Lin, Cindy C. Chen
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Patent number: 6777148Abstract: Disclosed are a novel organic photoconductive material suitable as a charge-transporting material in a photosensitive layer of an electrophotographic photoreceptor or usable in various display devices, and an electrophotographic photoreceptor which uses the above organic photoconductive material in a photosensitive layer and which exhibits a high charge potential and high sensitivity and also exhibits little or almost no change in various properties in repeated use and can exhibit stabilized performances. The present invention provides an organic photoconductive material comprising a compound having a specific structure and an electrophotographic photoreceptor having a photosensitive layer containing the above photoconductive material.Type: GrantFiled: October 21, 2002Date of Patent: August 17, 2004Assignee: Mitsubishi Paper Mills LimitedInventors: Tatsuya Kodera, Koichi Torizuka
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Publication number: 20040151999Abstract: An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transport layer comprises a lower concentration of different charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the second (top) charge transport layer is a high mobility hole transport compound. The charge transport compound in each layer is dissolved or molecularly dispersed in an electrically inactive film forming polymer to form a solid solution. In such a construction, the resulting dual charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: ApplicationFiled: December 12, 2003Publication date: August 5, 2004Applicant: Xerox CorporationInventors: Satchidanand Mishra, Houy Jen Yuh, Anthony M. Horgan, Markus R. Silvestri, Robert C.U. Yu, Yuhua Tong, Dale Renfer, Kenny-Tuan Dinh, Geoff Foley, Jack Yanus, Timothy Fuller
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Publication number: 20040137345Abstract: An electrophotographic photoreceptor for wet development including an electrically conductive substrate, and an organic photosensitive layer formed on the electrically conductive substrate, wherein a surface layer of the organic photosensitive layer includes at least a binder resin comprising a polymer compound and a charge transport material comprising a low molecule compound, the surface layer having an oxygen gas permeation coefficient of 5×10−13 cm3 (STP)*cm/s*cm2*cmHg or less. The electrophotographic photoreceptor has high durability for liquid developer used in a wet development technique and can produce good image characteristics.Type: ApplicationFiled: October 8, 2003Publication date: July 15, 2004Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Saburo Yokota, Hwan-koo Lee, Kyung-yol Yon
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Publication number: 20040126684Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: ApplicationFiled: December 16, 2003Publication date: July 1, 2004Applicant: Xerox CorporationInventors: Anthony M. Horgan, Robert C.U. Yu, Satchidanand Mishra, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
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Publication number: 20040126685Abstract: An imaging member having a charge transport layer with multiple regions is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein at least the top or uppermost transport layer comprises a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be of the same or different compounds from that included in the top or additional charge transport layer(s). The charge transport compound present in each layer may be dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: ApplicationFiled: December 16, 2003Publication date: July 1, 2004Applicant: Xerox CorporationInventors: Anthony M. Horgan, Satchidanand Mishra, Robert C.U. Yu, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
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Publication number: 20040115544Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer comprises the application of charge transport molecules and a poly(fluoroacrylate)-graft-poly(methyl methacrylate) surfactant. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, excellent print quality and decreased crystallization of the charge transport component.Type: ApplicationFiled: December 16, 2002Publication date: June 17, 2004Applicant: Xerox CorporationInventors: Min-Hong Fu, Colleen A. Helbig, Kent J. Evans, Kathleen M. Carmichael, David M. Skinner
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Publication number: 20040115545Abstract: A charge transport layer for an imaging member comprising a dual charge transport layer and wherein the charge transport layers comprise a photogenerating layer; (1) a first charge transport layer comprised of a charge transport component and a resin binder; and thereover and in contact with the first layer; (2) a second top charge transport layer comprised of a charge transport component, a resin binder and a hindered phenol dopant. The charge transport layer exhibits, excellent electrical performance, outstanding print quality and reduces the diffusion of the anti-oxidant into the charge generator layer.Type: ApplicationFiled: December 16, 2002Publication date: June 17, 2004Applicant: Xerox CorporationInventors: Anthony M. Horgan, Satchidanand Mishra, Robert C.U. Yu, Kathleen M. Carmichael, Kent J. Evans, Timothy J. Fuller, Colleen A. Helbig, John F. Yanus, Damodar M. Pai, Karen S. Garland
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Publication number: 20040115546Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.Type: ApplicationFiled: December 16, 2002Publication date: June 17, 2004Applicant: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
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Publication number: 20040091801Abstract: An electrophotographic photoreceptor includes a support, an undercoating, and a photosensitive layer, wherein the undercoating includes a charge transport material which is soluble in an organic solvent and a binder resin.Type: ApplicationFiled: July 3, 2003Publication date: May 13, 2004Applicant: SAMSUNG Electronics Co., Ltd.Inventors: Hae-ree Joo, Beom-jun Kim, Nam-Jeong Lee, Hwan-koo Lee, Saburo Yokota, Kyung-yol Yon
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Publication number: 20040086796Abstract: An imaging member including, for example, a substrate, a charge blocking layer, an optional adhesive layer, a charge generating layer, a charge transporting layer comprising, and a film forming polymer binder substantially free of low molecular weight fractions.Type: ApplicationFiled: October 31, 2002Publication date: May 6, 2004Applicant: Xerox Corporation.Inventors: Robert C. U. Yu, Timothy J. Fuller, Kathleen M. Carmichael
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Publication number: 20040063012Abstract: An improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate wherein the photoconductive element hasType: ApplicationFiled: June 9, 2003Publication date: April 1, 2004Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam W. Law
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Patent number: 6677090Abstract: A charge transport layer for an imaging member comprising a charge transport material with a single carbon cored dendrimeric, star-like molecular structure not exhibiting early onset of charge transport layer fatigue cracking. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and outstanding print quality.Type: GrantFiled: July 23, 2002Date of Patent: January 13, 2004Assignee: Xerox CorporationInventors: Yuhua Tong, John F. Yanus, Timothy J. Fuller, Alexander N. Klymachyov, Min-Hong Fu
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Publication number: 20040002013Abstract: An electrostatographic article including: a substrate; a charge generator layer overcoated on the substrate and which layer is sensitive to blue light; and a charge transport layer overcoated on the charge generator layer and which charge transport layer is transparent to blue light.Type: ApplicationFiled: June 28, 2002Publication date: January 1, 2004Applicant: Xerox CorporationInventors: Timothy P. Bender, John F. Graham