Arylamine Containing Patents (Class 430/58.65)
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Patent number: 7666560Abstract: An imaging member includes a charge generating layer and a charge transport layer. The charge transport layer includes a first surface in contact with the charge generating layer and a second surface. The charge transport layer includes a film forming polymer binder and a charge transport component dispersed therein. The concentration of the charge transport component in the charge transport layer is at a peak in a region of the charge transport intermediate the first and second surfaces of the charge transport layer.Type: GrantFiled: June 21, 2005Date of Patent: February 23, 2010Assignee: Xerox CorporationInventors: Satchidanand Mishra, Anthony M. Horgan, Kent Evans, George Liebermann, Kathleen M. Carmichael, Dennis J. Prosser, Richard L. Post, Edward Domm, Johann Junginger, Michael Zak
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Patent number: 7659043Abstract: The object of the present invention is to provide a composition for conductive materials from which a conductive layer having a high carrier transport ability can be made, a conductive material formed of the composition and having a high carrier transport ability, a conductive layer formed using the conductive material as a main material, an electronic device provided with the conductive layer and having high reliability, and electronic equipment provided with the electronic device.Type: GrantFiled: October 17, 2005Date of Patent: February 9, 2010Assignee: Seiko Epson CorporationInventors: Takashi Shinohara, Yuji Shinohara, Koichi Terao
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Publication number: 20100015539Abstract: The presently disclosed embodiments are directed to an improved low wear overcoat for an imaging member having a substrate, a charge transport layer, and an overcoat layer positioned on the charge transport layer, and a process for preparing the same, where the overcoat layer includes an aromatic polyol binder, a hole transport molecule, and a melamine formaldehyde curing resin.Type: ApplicationFiled: July 16, 2008Publication date: January 21, 2010Applicant: XEROX CORPORATIONInventors: Yu Qi, Nan-Xing Hu, Vladislav Skorokhod, Yvan Gagnon, Ah-Mee Hor
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Patent number: 7642029Abstract: A flexible imaging member which does not require the use of an anti-curl back coating is disclosed herein. The flexible imaging member has a layer comprising two charge transport molecules dispersed in a film-forming polymer binder and an overcoat layer. The first charge transport molecule is a biphenyl amine, terphenyl diamine, or bis(triarylamine) stilbene. The second charge transport molecule is a bis(triarylamine), tri-p-tolylamine, or triphenylamine. The weight ratio of second charge transport molecule to first charge transport molecule is from about 90:10 to about 66:34. Trifluoro acetic acid is also added to the layer containing the charge transport material.Type: GrantFiled: October 28, 2005Date of Patent: January 5, 2010Assignee: Xerox CorporationInventors: Anthony M. Horgan, Robert C. U. Yu, Kathleen M. Carmichael
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Publication number: 20090325095Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and a charge transport layer that includes a charge transport component, and a mixture of a bis(enylaryl)arylamine and a tris(enylaryl)amine.Type: ApplicationFiled: June 30, 2008Publication date: December 31, 2009Applicant: XEROX CORPORATIONInventor: Jin Wu
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Publication number: 20090324300Abstract: The present invention provides an electrophotographic carrier which includes a core particle, a first resin layer containing a charge-generating material for coating the core particle, and a second resin layer containing a hole-transporting material for coating the first resin layer. The invention also provides a two-component developer comprising said carrier, and an image-forming process and apparatus using said developer. According to the invention, high quality images can be formed, with excellent image density (especially when developing solid images) and less fogging.Type: ApplicationFiled: June 23, 2009Publication date: December 31, 2009Inventor: Keigo MITAMURA
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Publication number: 20090324281Abstract: An electrophotographic photoreceptor is provided that contains a conductive substrate, an undercoat layer, a charge generation layer, and a charge transport layer, wherein the under coat layer contains a binder resin and multiple inorganic pigments each having different average primary particle diameters in a total amount of from 75 to 86% by weight, the charge generation layer contains a binder resin and a titanyl phthalocyanine pigment having a specific X-ray diffraction spectrum in an amount of from 70 to 85% by weight, the charge transport layer comprises a specific distyryl compound, and the following formulae (2-1) to (2-3) are satisfied: 0.2?(D(F2)/D(G))?0.5??(2-1) 0.2?D(F1)??(2-2) D(F2)?D(F1)??(2-3) wherein D(F1) (?m) and D(F2) (?m) represent average primary particle diameters of the largest and smallest inorganic pigments, respectively, and D(G) (?m) represents an average primary particle diameter of the titanyl phthalocyanine pigment.Type: ApplicationFiled: June 23, 2009Publication date: December 31, 2009Applicant: RICOH COMPANY, LTD.Inventors: Hiromi Tada, Nozomu Tamoto, Tomoyuki Shimada, Takafumi Iwamoto
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Publication number: 20090325094Abstract: Provided is an imaging member such as photoreceptor comprising a substrate, a charge generation layer, a first charge transport layer, a second charge transport layer, and an optional overcoat layer. The first charge transport layer is formed from a first CTL formulation comprising an aromatic monoamine and a first polymeric film forming binder material. The second charge transport layer is formed from a second CTL formulation comprising aromatic diamine and a second polymeric film forming binder material. The imaging member has gained improved properties such as removal of anti-curl layer, desirable structural flatness, electrical properties, mechanical robustness, flexibility, longevity, and copy image qualities over extended use, among others.Type: ApplicationFiled: September 16, 2009Publication date: December 31, 2009Applicant: Xerox CorporationInventors: Yuhua Tong, John F. Yanus, Jin Wu, Steven M. Sterling, Susan M. VanDusen
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Publication number: 20090317136Abstract: A multilayered electrophotographic photoreceptor comprising at least 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 transport layer contains, as the charge transport material, an amine type compound represented by the following formula (I): wherein R1 to R9, which may be the same or different, respectively represent a hydrogen atom; a halogen atom; or an alkyl, cycloalkyl, alkenyl or alkoxy group which may have a substituent, provided that either one of R2 and R3 represents —N(Ar1)(Ar2); and Ar1 to Ar4, which may be the same or different, respectively represent an aromatic hydrocarbon residue or an aromatic heterocyclic residue which may have a substituent, and Ar1 and Ar2, or Ar3 and Ar4 may be combined with each other to form a condensed ring; and has photosensitive properties in coherent light of wavelength range from 400 to 450 nm.Type: ApplicationFiled: May 19, 2009Publication date: December 24, 2009Applicant: SHARP KABUSHIKI KAISHAInventors: Hiroshi SUGIMURA, Akihiro KONDOH
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Patent number: 7635548Abstract: An electrophotographic imaging member includes a substrate, a photogenerating layer, and an optional overcoating layer, where the photogenerating layer includes a self-assembled carbon nanotube material having pendant charge transport materials.Type: GrantFiled: August 8, 2006Date of Patent: December 22, 2009Assignee: Xerox CorporationInventor: Timothy P. Bender
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Patent number: 7629094Abstract: An electrophotographic photoreceptor including an electroconductive substrate and a photosensitive layer located overlying the electroconductive substrate, wherein the photosensitive layer comprises units obtained from a radical polymerizing monomer, in which an aliphatic group having two radical polymerizing groups and a charge transporting group including no radical polymerizing group are connected to each other in a single bond, at the surface thereof.Type: GrantFiled: December 27, 2005Date of Patent: December 8, 2009Assignee: Ricoh Company, Ltd.Inventors: Kazukiyo Nagai, Tetsuro Suzuki, Hiroshi Tamura, Hongguo Li, Tamotsu Horiuchi
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Patent number: 7618756Abstract: A photoconductor containing a supporting substrate, a photogenerating layer; and at least one charge transport layer where the photogenerating layer contains a photogenerating pigment and a chelating additive or agent.Type: GrantFiled: March 6, 2007Date of Patent: November 17, 2009Assignee: Xerox CorporationInventors: Jin Wu, Kent J. Evans, Dennis J. Prosser, Liang-Bih Lin, Raymond K. Crandall
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Patent number: 7618757Abstract: Provided is an imaging member such as photoreceptor comprising a substrate, a charge generation layer, a first charge transport layer, a second charge transport layer, and an optional overcoat layer. The first charge transport layer is formed from a first CTL formulation comprising an aromatic monoamine and a first polymeric film forming binder material. The second charge transport layer is formed from a second CTL formulation comprising aromatic diamine and a second polymeric film forming binder material. The imaging member has gained improved properties such as removal of anti-curl layer, desirable structural flatness, electrical properties, mechanical robustness, flexibility, longevity, and copy image qualities over extended use, among others.Type: GrantFiled: May 11, 2005Date of Patent: November 17, 2009Assignee: Xerox CorporationInventors: Yuhua Tong, John F. Yanus, Jin Wu, Steven M. Sterling, Susan M. VanDusen
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Publication number: 20090253061Abstract: An electrophotographic photoreceptor includes a conductive substrate, and a photosensitive layer, an intermediate layer having a thickness of 2 nm to 70 nm, and a surface layer, which are disposed in this order on the conductive substrate. The refractive index n1 of the photosensitive layer, the refractive index n2 of the intermediate layer, and the refractive index n3 of the surface layer satisfy an inequality, n2>n3>n1.Type: ApplicationFiled: December 10, 2008Publication date: October 8, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Shigeru YAGI, Takeshi IWANAGA, Masayuki NISHIKAWA, Nobuyuki TORIGOE
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Patent number: 7592111Abstract: An electrostatographic imaging member formulated with a liquid carbonate is provided. The imaging electrostatographic member exhibits improved service life.Type: GrantFiled: November 5, 2004Date of Patent: September 22, 2009Assignee: Xerox CorporationInventors: Robert C. U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Yuhua Tong, Edward F. Grabowski, Kathleen M. Carmichael, Markus R. Silvestri
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Publication number: 20090226829Abstract: Described herein are photoreceptor devices that include aligned domains of charge transport materials that have a pi-pi orbital overlap.Type: ApplicationFiled: October 1, 2008Publication date: September 10, 2009Applicant: XEROX CORPORATIONInventors: Hany AZIZ, Kathy L. DE JONG
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Patent number: 7582399Abstract: Imaging members useful in electrostatographic apparatuses, including printers, copiers, other reproductive devices, and digital apparatuses. More particularly, imaging members having nano polymeric gel particles embedded into one or more layers of the imaging member that provide for increased mechanical strength and improved wear.Type: GrantFiled: June 22, 2006Date of Patent: September 1, 2009Assignee: Xerox CorporationInventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Markus Silvestri, Susan Vandusen, Chieh-Min Cheng, Huoy-Jen Yuh, Cindy Chen, Lanhui Zhang
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Publication number: 20090214968Abstract: A mixture of bisamine compounds comprising a bisamine compound represented by Formula (1) and a bisamine compound represented by Formula (2): A-X-A??Formula (1) A-X—B??Formula (2) wherein, A and B represent a different substituted amino group represented by Formula (3), X represents a bivalent linkage group: wherein, each of Ara and Arb independently represents an aryl group which may have a substituted group, and Arc represents an arylene group which may have a substituted group, and Ara, Arb and Arc may be combined to form a ring structure.Type: ApplicationFiled: February 18, 2009Publication date: August 27, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Shinichi Hamaguchi, Toyoko Shibata, Tomoko Sakimura
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Publication number: 20090214969Abstract: A photoconductive member a layer including a substantially crosslinked product of a film-forming composition having at least a curing agent and a charge transport compound, wherein the charge transport compound has at least one group imparting charge transporting functionality, at least one crosslinking group and at least one fluorene moiety.Type: ApplicationFiled: February 26, 2008Publication date: August 27, 2009Applicant: XEROX CORPORATIONInventors: Jennifer A. COGGAN, Nan-Xing HU, Matthew A. HEUFT, Kathy L. DE JONG
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Patent number: 7575838Abstract: 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: GrantFiled: July 6, 2006Date of Patent: August 18, 2009Assignee: Xerox CorporationInventors: 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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Patent number: 7569317Abstract: An imaging member is disclosed which includes a charge generating layer and a charge transport layer. The charge transport layer includes a first charge transport layer adjacent the charge generating layer and at least a second charge transport layer adjacent the first charge transport layer. Each charge transport layer includes a film forming polymer binder and a charge transport material dispersed therein. The first charge transport material has a composition which is the same or different than the second charge transport material and of a lower concentration. It may be selected from an aryl amine, aryl diamine, or combinations thereof. The combination has the effect of reducing charge deficient spots.Type: GrantFiled: December 21, 2005Date of Patent: August 4, 2009Assignee: Xerox CorporationInventors: Satchidanand Mishra, Kathleen M. Carmichael, Yuhua Tong, Anthony M. Horgan, Edward F. Grabowski, Richard L. Post, Susan M. VanDusen
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Publication number: 20090185821Abstract: An electrophotographic photoreceptor including a conductive substrate; a charge generation layer comprising a metal phthalocyanine pigment as a charge generation material, located overlying the conductive substrate; a charge transport layer comprising a charge transport material having a triarylamine structure, located overlying the charge generation layer; and a cross-linked charge transport layer formed by hardening a radical-polymerizable monomer having no charge transport structure and a radical-polymerizable compound having a charge transport structure, located overlying the charge transport layer. The electrophotographic photoreceptor satisfies the following equations (1) and (2): ?0.16?Ip(T)?Ip(G)?0.07 ??(1) 0.07<Ip(O)?Ip(G)?0.33 ??(2) wherein Ip(G), Ip(T), and Ip(O) represent ionization potentials of the charge generation layer, the charge transport layer, and the cross-linked charge transport layer, respectively.Type: ApplicationFiled: January 12, 2009Publication date: July 23, 2009Applicant: RICOH COMPANY, LTDInventors: Takafumi Iwamoto, Nozomu Tamoto, Hiromi Tada
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Patent number: 7560208Abstract: A photoconductor containing a substrate, an undercoat layer thereover comprising a resin mixture of, for example, a polyol resin, and an aminoplast resin, and a polyester, and a metal oxide; a photogenerating layer and at least one, such as 1 to about 4, charge transport layer.Type: GrantFiled: August 1, 2006Date of Patent: July 14, 2009Assignee: Xerox CorporationInventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Francisco J. Lopez
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Patent number: 7560205Abstract: A photoconductive imaging including at least a substrate, a charge generating layer, a charge transport layer, and an overcoat layer. The overcoat layer includes a crosslinked product of at least a phenolic resin and a phenol compound.Type: GrantFiled: August 31, 2005Date of Patent: July 14, 2009Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, Cheng-Kou Hsiao
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Patent number: 7547842Abstract: Disclosed herein is an organic electronic device comprising a charge transport layer comprising a host charge transport material and a guest charge transport material, wherein the guest material is not homogeneously distributed in the host material and is spatially doped within the host material. The charge transport layer may be either a hole or electron transport layer and is useful in a variety of organic electronic devices.Type: GrantFiled: October 17, 2007Date of Patent: June 16, 2009Inventor: Ying Wang
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Publication number: 20090117476Abstract: Disclosed is an electrophotographic imaging member that includes a substrate; a charge generating layer; a charge transport layer; and a protective overcoat layer having a polyol binder; a hole transport material; an acid catalyst; a leveling agent; and no melamine formaldehyde curing agent or cross-linking additive. Also disclosed is a process for forming a photoreceptor that includes providing a substrate; applying to it a charge generating layer, charge transport layer; and protective over coating layer having a polyol binder; a hole transport material; an acid catalyst; a leveling agent; and no melamine formaldehyde curing agent or cross-linking additive. Additionally provided is a method of forming an image with the disclosed electrophotographic imaging member.Type: ApplicationFiled: November 7, 2007Publication date: May 7, 2009Applicant: XEROX CORPORATIONInventors: Matthew A. HEUFT, Hany AZIZ, Kathy L. DE JONG, Nan-Xing HU
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Patent number: 7527903Abstract: A flexible imaging member which does not require the use of an anti-curl back coating is disclosed herein. The flexible imaging member has a layer comprising two charge transport molecules dispersed in a film-forming polymer binder. The first charge transport molecule is a biphenyl amine, terphenyl diamine, or bis(triarylamine) stilbene. The second charge transport molecule is a bis(triarylamine), tri-p-tolylamine, or triphenylamine. The weight ratio of second charge transport molecule to first charge transport molecule is from about 90:10 to about 67:33. Trifluoro acetic acid is also added to the layer containing the charge transport material.Type: GrantFiled: October 28, 2005Date of Patent: May 5, 2009Assignee: Xerox CorporationInventors: Kathleen M. Carmichael, Kent J. Evans, Kathy Lippman, legal representative, Satish Parikh, Donald Sullivan
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Patent number: 7510809Abstract: An electrophotographic photoreceptor including a charge generating layer and a charge transfer layer accumulated on a support member, the charge transfer layer including at least two layers of a support side layer and a surface side layer, wherein the support side layer contains A mol/cm3 of charge mol/cm3 of charge transfer material having a dipolar moment of not more than 0.75 and inorganic particles having a number average primary particle diameter of 3-150 nm, wherein A and B satisfies relations of (1) and (2), 9.0×10?4>A>3.0×10?4??(1) 8.0×10?4>B>2.0×10?5??(2).Type: GrantFiled: November 21, 2005Date of Patent: March 31, 2009Assignee: Konica Minolta Business Technologies, Inc.Inventors: Chigusa Yamane, Keiichi Inagaki, Kunihiro Ogura
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Publication number: 20090067891Abstract: The present invention provides an electrophotographic photoconductor including, an uppermost crosslinked surface layer including a cured product of a crosslinked surface layer composition containing a tri- or more functional radical-polymerizable monomer having no charge transportable structure, organosilica sol, an isocyanate group-containing radical-polymerizable monomer, and a curable charge transport material.Type: ApplicationFiled: September 9, 2008Publication date: March 12, 2009Applicant: RICOH COMPANY, LTD.Inventors: Hidetoshi Kami, Tetsuro Suzuki, Hiroshi Tamura, Yukio Fujiwara, Hiroshi Ikuno
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Publication number: 20090011349Abstract: An object of the invention is to provide a photoreceptor for electrophotography which has a low residual potential in an initial stage, is inhibited from increasing in residual potential, is prevented from decreasing in charge potential, undergoes little fatigue deterioration even upon repeated use, and is less apt to pose a problem concerning toxicity or environmental pollution. The invention relates to a photoreceptor for electrophotography which has a photosensitive layer containing an aromatic hydroxycarboxylic acid metal complex represented by the following general formula (1): and one or more charge-transporting agents each having an arylaminophenyl group in the molecule.Type: ApplicationFiled: January 18, 2007Publication date: January 8, 2009Applicant: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Makoto Koike, Atsushi Takesue
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Publication number: 20080318142Abstract: A photoreceptor including an electroconductive substrate; a photosensitive layer, which is located overlying the electroconductive substrate and which includes a charge generation material, a charge transport material having no radical polymerizability, a binder resin having no radical polymerizability, and a crosslinked polymer including a unit obtained from a first radically polymerizable monomer having three or more functional groups and no charge transport structure and a unit obtained from a second radically polymerizable monomer having a charge transport structure; and an outermost layer, which is located on the photosensitive layer and which includes a crosslinked polymer including a unit obtained from a third radically polymerizable monomer having three or more functional groups and no charge transport structure and a unit obtained from a fourth radically polymerizable monomer having a charge transport structure. An image forming method and apparatus, and a process cartridge using the photoreceptor.Type: ApplicationFiled: May 28, 2008Publication date: December 25, 2008Applicant: RICOH COMPANY, LTD.Inventors: Yoshiaki KAWASAKI, Akihiro Sugino, Mitsuaki Hirose
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Publication number: 20080286670Abstract: A photoconductor that includes an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the charge transport layer contains a phenolic chelating additive.Type: ApplicationFiled: May 18, 2007Publication date: November 20, 2008Inventors: Jin Wu, Kent J. Evans, Sherri A. Colon, Dale S. Renfer
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Patent number: 7432028Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport composition comprising molecules having the formula where n is an average of a distribution of integers generally between 2 and 50,000, and in which n is at least 2; R1, R2, R3, and R4 comprise, each independently, H, an alkyl group, an alkenyl group, a heterocyclic group, or an aromatic group; X comprises an (N,N-disubstituted)arylamine group; and Y is a bridging group; (b) a charge generating compound; and (c) an electrically conductive substrate over which the charge transport composition and the charge generating compound are located.Type: GrantFiled: February 4, 2004Date of Patent: October 7, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Vytautas Getautis, Tadas Malinauskas, Juozas V. Grazulevicius, Valentas Gaidelis, Vygintas Jankauskas, Zbigniew Tokarski, Nusrallah Jubran, Kam W. Law
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Publication number: 20080227007Abstract: An image forming apparatus including an image bearing member, a charger, an irradiator, and a developing device, wherein the relationships T1?T2 and T2=W/V are satisfied, wherein T1 (msec) represents a real transit time, defined as a value on X-axis of a first flection point, at which a surface potential (Y) of the image bearing member firstly rises up when a time (X) between irradiating the image bearing member and measuring the surface potential of the irradiated portion thereof is shortened, in a graph showing a relationship between X and Y; T2 (msec) represents a charging time; W (mm) represents a charging width of the charger; and V (mm/msec) represents a linear velocity of the image bearing member.Type: ApplicationFiled: March 7, 2008Publication date: September 18, 2008Inventors: Nozomu Tamoto, Hiromi Tada, Yoshinori Inaba, Katsuichi Ohta
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Publication number: 20080220352Abstract: A photoconductor containing a supporting substrate, a photogenerating layer; and at least one charge transport layer where the photogenerating layer contains a photogenerating pigment and a chelating additive or agent.Type: ApplicationFiled: March 6, 2007Publication date: September 11, 2008Inventors: Jin Wu, Kent J. Evans, Dennis J. Prosser, Liang-Bih Lin, Raymond K. Crandall
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Publication number: 20080220350Abstract: A photoconductor containing a substrate; an undercoat layer thereover wherein the undercoat layer includes an electroconducting component dispersed in a rapid curing polymer matrix; a photogenerating layer, and at least one charge transport layer.Type: ApplicationFiled: March 6, 2007Publication date: September 11, 2008Inventors: Jin Wu, Dennis J. Prosser, Satchidanand Mishra, Liang-Bih Lin, Daniel V. Levy, Lin Ma
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Patent number: 7416824Abstract: According to the present invention, an enamine compound having a specific structure is used as an organic photoconductive material. This enamine compound is obtained based on asymmetrical secondary naphtylamine which is readily available at a lowest price, by introducing phenyl groups containing substituents, as constituents units of the enamine part and presents excellent compatibility with binder resins, will not present detrimental effects such as partial crystallization at film forming and have a high charge mobility. The compound is able to realize highly reliable electrophotographic photoreceptor and an image forming apparatus which present a high electrostatic potential, high sensitivity and high enough light response and are excellent in durability and will not degrade in these characteristics under a low-temperature environment or in a high-speed process and will not lower in these characteristics even due to exposure to light.Type: GrantFiled: May 10, 2004Date of Patent: August 26, 2008Assignee: Sharp Kabushiki KaishaInventors: Akihiro Kondoh, Takatsugu Obata, Kazuya Ishida
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Publication number: 20080199217Abstract: An object is to provide an electrophotographic photoconductor which prevents an increase in the friction coefficient of the photoconductor surface caused when printing takes place for a long period of time or in large amounts, which has sustainability of the low photoconductor surface friction coefficient, low wear properties and high durability, and which is particularly superior in polymerized toner (or spherical toner) cleaning capability; a process cartridge incorporating the electrophotographic photoconductor; and an image forming apparatus incorporating the electrophotographic photoconductor.Type: ApplicationFiled: February 21, 2008Publication date: August 21, 2008Inventors: Takafumi IWAMOTO, Tetsuro Suzuki, Hiroshi Tamura, Hiroshi Ikuno, Hidetoshi Kami, Yukio Fujiwara
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Patent number: 7403735Abstract: An image formation apparatus using an elecrophotographic process for obtaining a high quality image with tone value R2 of equal to or more than 0.98 is provided. The resolution for light-writing is equal to or more than 1200 dpi and/or light-writing is performed based on image data formed by applying halftone processing at a line frequency of equal to or more than 200 lpi. Light-writing means is accomplished with a laser light beam with a beam diameter equal to or less than 35 ?m. The photoconductor includes a charge generating layer containing a charge generating material and a charge transfer layer containing a charge transfer material laminated on a conductive support. The ionization potential of the charge generating material Ip(CG) and ionization potential of the charge transfer material Ip(CT) satisfy the relationship of Ip(CG)?Ip(CT).Type: GrantFiled: January 24, 2003Date of Patent: July 22, 2008Assignee: Ricoh Company, Ltd.Inventors: Kei Yasutomi, Yasuo Suzuki
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Publication number: 20080153020Abstract: The present invention provides an electrophotographic photoconductive member comprising a substrate, and a photoconductive layer containing a hole transferring material, a charge generating material and a binder resin, wherein a value (IV/OV value) in which the inorganic value is divided by the organic value of the binder resin is 0.Type: ApplicationFiled: December 19, 2007Publication date: June 26, 2008Applicant: Kyocera Mita CorporationInventors: Kazunari Hamasaki, Shiho Kuboshima, Daisuke Kuboshima, Yuko Iwashita
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Publication number: 20080138728Abstract: To provide a latent electrostatic image bearing member including: an outermost surface layer that comprises a compound represented by the following General Formula (1) and a crosslinked resin formed by crosslinking between an isocyanate compound and a reactive charge transporting substance having at least two hydroxyl groups. where R1 and R2 may be identical or different and each represent a substituted or unsubstituted alkyl group; and R3 represents one of alkyl and aryl groups which have at least one hydroxyl group.Type: ApplicationFiled: November 29, 2007Publication date: June 12, 2008Inventors: Akihiro Sugino, Nobuya Mori
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Publication number: 20080138724Abstract: A photoreceptor drum is disclosed with a charge transport layer comprising a substituted terphenyl diamine having the structure of Formula (I): wherein R1 and R2 are independently selected from the group consisting of hydrogen, alkyl having from 1 to 10 carbon atoms, halogen, and phenyl; and wherein at least one of R1 and R2 is not hydrogen.Type: ApplicationFiled: August 9, 2007Publication date: June 12, 2008Applicant: Xerox CorporationInventors: Nancy L. Belknap, John F. Yanus, Dale S. Renfer, Anthony M. Horgan, Kendra M. Giza
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Patent number: 7374855Abstract: Methods for texturing the surface of photoreceptors are provided.Type: GrantFiled: May 10, 2005Date of Patent: May 20, 2008Assignee: Xerox CorporationInventors: William H. Wayman, Douglas A. Lundy, John S. Facci, Moritz Wagner, Michael J. Turan, Charles D. Deichmiller
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Publication number: 20080107985Abstract: A photoconductor containing an optional supporting substrate, a silanol containing photogenerating layer, at least one charge transport layer, and a top overcoating layer in contact with and contiguous to the charge transport layer.Type: ApplicationFiled: November 7, 2006Publication date: May 8, 2008Inventors: John F. Yanus, Jin Wu, Kenny-Tuan Dinh, Michael A. Morgan, Anthony M. Horgan
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Patent number: 7364823Abstract: An amine compound represented by the following general formula (1) is incorporated as a charge-transporting substance into a charge-transporting layer of an electrophotographic photoreceptor.Type: GrantFiled: March 30, 2005Date of Patent: April 29, 2008Assignee: Sharp Kabushiki KaishaInventors: Akihiro Kondoh, Takatsugu Obata
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Patent number: 7354685Abstract: A photoconductive member comprised of a hole blocking layer, a photogenerating layer, and a charge transport layer comprised of a polymer with a low dielectric constant and a charge transport component.Type: GrantFiled: January 26, 2005Date of Patent: April 8, 2008Assignee: Xerox CorporationInventors: Jin Wu, Liang-Bih Lin, James M. Duff, Timothy P. Bender
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Publication number: 20080038652Abstract: An electrophotographic imaging member includes a substrate, a photogenerating layer, and an optional overcoating layer, where the photogenerating layer includes a self-assembled carbon nanotube material having pendant charge transport materials.Type: ApplicationFiled: August 8, 2006Publication date: February 14, 2008Applicant: XEROX CORPORATIONInventor: Timothy P. BENDER
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Publication number: 20080032221Abstract: A photoconductor containing a substrate, an undercoat layer thereover comprising a polyol resin, an aminoplast resin, a polyarylate, a siloxane modified polyarylate, an epoxy modified polyarylate, or a urethane modified polyarylate, or an amine modified polyarylate, and a metal oxide; a photogenerating layer, and at least one charge transport layer.Type: ApplicationFiled: August 1, 2006Publication date: February 7, 2008Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Francisco J. Lopez
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Publication number: 20080032217Abstract: A photoconductor containing a substrate, a layer thereover wherein the layer comprises, for example, a polyol resin, an aminoplast resin, an ester of phosphoric acid adhesion component, and a metal oxide; and at least one imaging layer of, for example, a photogenerating layer and a charge transport layer formed on the polyol resin containing layer.Type: ApplicationFiled: August 1, 2006Publication date: February 7, 2008Inventors: Jin Wu, Daniel V. Levy, Robert W. Hedrick, Liang-Bih Lin
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Publication number: 20080032219Abstract: A photoconductor containing a substrate, an undercoat layer thereover comprising a resin mixture of, for example, a polyol resin, and an aminoplast resin, and a polyester, and a metal oxide; a photogenerating layer and at least one, such as 1 to about 4, charge transport layer.Type: ApplicationFiled: August 1, 2006Publication date: February 7, 2008Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Francisco J. Lopez