Nitrogen Hetero Ring Compound Patents (Class 430/58.5)
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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: 20090162764Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and a nitrogen heterocyclic component such as a triazine.Type: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Applicant: XEROX CORPORATIONInventors: Jin Wu, Linda L. Ferrarese, Marc J. Livecchi, Edward C. Savage
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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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Publication number: 20090123176Abstract: The present invention relates to a polyvinyl acetal resin having a specific repeating structural unit, an electrophotographic photosensitive member using the polyvinyl acetal resin, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member.Type: ApplicationFiled: December 5, 2006Publication date: May 14, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Masato Tanaka, Atsushi Fujii, Yuka Ishiduka, Masataka Kawahara, Masaki Nonaka
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Publication number: 20090104551Abstract: Disclosed is an electrophotographic photoreceptor comprising on an electrically conductive support, a charge generation layer and a charge transport layer, wherein the charge transport layer comprises a charge transport material represented by formula (1) and exhibits a transmittance at 370 nm of not more than 10% and a transmittance at 405 nm of not less than 70%, and the charge transport layer further comprising a compound represented by formula (2), (3) or (4).Type: ApplicationFiled: October 9, 2008Publication date: April 23, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tomoko SAKIMURA, Toyoko SHIBATA, Tomoo SAKIMURA, Takeshi ISHIDA, Shinichi HAMAGUCHI
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Publication number: 20090098474Abstract: A laminated type electrophotographic photoreceptor including an electrically conductive substrate and a charge generating layer and a charge transporting layer disposed on the electrically conductive substrate, wherein the charge transporting layer includes a naphthalenetetracarboxylic acid diimide derivative represented by Formula 1 below, and an electrophotographic imaging apparatus including the electrophotographic photoreceptorType: ApplicationFiled: May 22, 2008Publication date: April 16, 2009Applicant: Samsung Electronics Co., LtdInventors: Beom-jun KIM, Ji-uk KIM
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Publication number: 20090097881Abstract: To provide a novel triamine compound usable for providing an electrophotographic photoreceptor having excellent in effect of an ozone resistance, and causing no adverse effect in other characteristic aspects, and a method for producing the same, as well as an electrophotographic photoreceptor using the triamine compound, and an image forming apparatus having the same, there is provided the electrophotographic photoreceptor formed by laminating a monolayer type photosensitive layer containing a charge generating material and a charge transporting material, or a laminate type photosensitive layer having a charge generating layer containing the charge generating material and a charge transporting layer containing the charge transporting material laminated in this order, on a conductive supporting member made of a conductive material, the monolayer type photosensitive layer or the charge transporting layer of the laminate type photosensitive layer containing a specific triamine compound.Type: ApplicationFiled: October 15, 2008Publication date: April 16, 2009Inventors: Akihiro Kondoh, Takatsugu Obata
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Publication number: 20090092910Abstract: A photoconductor comprising a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein at least one of the photogenerating layer and the charge transport layer contains at least one of a pyridimium salt and a tetrazolium salt.Type: ApplicationFiled: October 9, 2007Publication date: April 9, 2009Applicant: XEROX CORPORATIONInventor: Jin Wu
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Publication number: 20090092908Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the at least one charge transport layer contains at least one charge trapping releaser.Type: ApplicationFiled: October 9, 2007Publication date: April 9, 2009Applicant: XEROX CORPORATIONInventor: Jin Wu
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Publication number: 20090092909Abstract: A photoconductor that includes for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and where the photogenerating layer contains at least one charge trapping releaser.Type: ApplicationFiled: October 9, 2007Publication date: April 9, 2009Applicant: XEROX CORPORATIONInventor: Jin Wu
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Publication number: 20090087763Abstract: The present invention is an electrophotographic photoconductor having a photosensitive layer on a conductive substrate. The photosensitive layer contains N-arylphthalimides additives.Type: ApplicationFiled: September 27, 2007Publication date: April 2, 2009Inventors: David S. Weiss, William T. Gruenbaum, John C. Wilson
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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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Publication number: 20090068577Abstract: The present invention provides a naphthalenetetracarboxylic acid diimide derivative represented by the following general formula (1): wherein R1 and R2, which are identical or different, each represent a substituted or non-substituted alkyl group or a substituted or non-substituted aromatic hydrocarbon group; R3 represents an alkyl group having 1 to 8 carbon atoms or an aromatic hydrocarbon group; R4, R5, R6 and R7, which are identical or different, each represent a hydrogen atom, a substituted or non-substituted alkyl group, or a substituted or non-substituted aromatic hydrocarbon group; and R1 and R2 may be linked to form a substituted or non-substituted heterocyclic group including a nitrogen atom; with compounds where all of R1, R2 and R3 are a methyl group, and compounds where both of R1 and R2 are a methyl group and R3 is a 1-octyl group being excluded.Type: ApplicationFiled: September 5, 2008Publication date: March 12, 2009Applicant: RICOH COMPANY, LTD.Inventors: Masafumi OHTA, Tomoyuki SHIMADA, Yuuji TANAKA, Eiji KURIMOTO, Keisuke SHIMOYAMA
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Publication number: 20090061335Abstract: The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an improved electrostatographic imaging member having a specific photoreceptor material package comprising an undercoat layer, a charge generation layer having a specific pigment blend, a long life charge transport layer, and an optional overcoat layer.Type: ApplicationFiled: August 28, 2007Publication date: March 5, 2009Applicant: Xerox CorporationInventors: Nancy L. Belknap, Lanhui Zhang, Kathryn A. Wallace, Jodie L. Watson
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Publication number: 20090053636Abstract: The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an improved electrostatographic imaging member having a charge transport layer that is partially crosslinked, wherein the crosslinking is achieved by incorporating a small amount of compatible thermalsetting resins into the layer. Incorporation of these resins, using a fast curing system, have been shown to increase charge transport life while providing improved manufacture of a photoreceptor in which curing is faster and possible at a lower temperature.Type: ApplicationFiled: August 21, 2007Publication date: February 26, 2009Applicant: Xerox CorporationInventors: Liang-Bih Lin, Daniel V. Levy
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Publication number: 20090047588Abstract: An imaging member including a substrate; a charge generation layer; a charge transport layer containing a mixture including a polymer and charge transport components, wherein the mixture has a glass transition temperature of less than about 70° C.; and an overcoat having a crosslinked polymer network including a resin, charge transport molecules, crosslinking component, an acid catalyst and an optional low surface component, and wherein the resin is a resin selected from the group consisting of polyester and polyol resins, and further wherein the resin has crosslinking sites selected from the group consisting of hydroxyl and carboxy groups.Type: ApplicationFiled: August 14, 2007Publication date: February 19, 2009Applicant: XEROX CORPORATIONInventors: John F. Yanus, Kenny-Tuan Dinh, Markus R. Silvestri, Dale S. Renfer
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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: 20090004583Abstract: According to the invention, there is provided an electrophotographic photoreceptor comprising a conductive substrate and a photosensitive layer provided on a surface of the conductive substrate, an outermost layer of the photosensitive layer containing a crosslinked product composed of a guanamine compound and at least one charge transporting material having at least one substituent selected from the group consisting of —OH, —OCH3, —NH2, —SH, and —COOH.Type: ApplicationFiled: March 17, 2008Publication date: January 1, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Katsumi NUKADA, Wataru YAMADA, Masahiro IWASAKI, Kazuhiro KOSEKI
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Publication number: 20080298840Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer located overlying the conductive substrate which includes a naphthalenetetracarboxylic acid diimide derivative having a specific formula; and an image forming apparatus and a process cartridge using the electrophotographic photoreceptor are provided.Type: ApplicationFiled: June 3, 2008Publication date: December 4, 2008Inventor: Tomoyuki SHIMADA
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Publication number: 20080299472Abstract: A coating composition that contains a mixture of an alkyl alcohol, a glycol monoether, a charge transport component, a crosslinking component, and at least one hydroxyl containing polymer, and a photoconductor thereof with a supporting substrate, a photogenerating layer, and at least one charge transport layer, and an overcoating layer in contact with and contiguous to the charge transport layer, and which overcoating is comprised of a mixture of an alkyl alcohol, a glycol monoether, an acrylated polyol, a polyalkylene glycol, a crosslinking component, and a charge transport component.Type: ApplicationFiled: May 31, 2007Publication date: December 4, 2008Inventors: Kathy L. DeJong, Nan-Xing Hu, Hany Aziz, Jennifer A. Coggan, Johann Junginger, Ah-Mee Hor, John F. Yanus, Kenny-Tuan Dinh
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Publication number: 20080280220Abstract: Disclosed herein is an electrophotographic imaging member comprising a substrate, and a charge generating layer containing a phthalocyanine pigment, a binder, and a solvent. The charge generating layer has a pigment particle separation distance of 28 nm or less after evaporation of the solvent. A coating system, a method of making an electrophotographic imaging member, and a method of printing also are disclosed.Type: ApplicationFiled: May 7, 2007Publication date: November 13, 2008Inventors: Cindy C. Chen, Lanhui Zhang, Linda L. Ferrarese, James M. Markovics, Marc J. LiVecchi, Edward C. Savage, James R. Backus
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Publication number: 20080280221Abstract: An electrophotographic photoreceptor including a conductive substrate; and a photosensitive layer located overlying the conductive substrate, including a charge generation material, an electron transport material having a specific formula, and a hole transport material having a specific formula.Type: ApplicationFiled: May 5, 2008Publication date: November 13, 2008Inventors: Keisuke Shimoyama, Eiji Kurimoto
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Patent number: 7449268Abstract: 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: May 27, 2005Date of Patent: November 11, 2008Assignee: Xerox CorporationInventors: Timothy P. Bender, John Graham, James M. Duff
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Patent number: 7410738Abstract: A photoconductive imaging member containing an optional supporting substrate, an optional hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the charge transport layer contains a phenol of, for example, the alternative formulasType: GrantFiled: February 10, 2004Date of Patent: August 12, 2008Assignee: Xerox CorporationInventors: John F. Yanus, Kenny-Tuan T. Dinh, Markus R. Silvestri, H. Bruce Goodbrand, M. John Hinckel, Dale S. Renfer, Yuhua Tong
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Patent number: 7358015Abstract: Plasticizers in a charge transfer layer to reduce surface cracking and crazing having a hydrocarbon chain, attached to a hindered phenol containing triazole or triazine moiety. Plasticizers found useful for this application can be used in a concentration (by weight of the charge transfer layer) in the order of magnitude of 10% to about 25%. The plasticizer additive may also be used in combination with other known plasticizers such as those containing a 2-ethylhexyl group.Type: GrantFiled: June 3, 2005Date of Patent: April 15, 2008Assignee: Lexmark International, Inc.Inventors: Mark Thomas Bellino, Catherine Mailhé Randolph, Kasturi Rangan Srinivasan
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Patent number: 7358014Abstract: A novel charge transport compound, a novel process using that novel compound and an organophotoreceptor includes: (a) a novel charge transport compound having the formula where R1 and R2 are selected so that R1 and R2 form, with the included nitrogen atom, a group selected from the group consisting of heterocyclic rings, aromatic rings, and dinaphthylamine; or R1 comprises an aryl group and R2 comprises a group selected from the group consisting of sulfolanyl, pyrrolyl, pyrazolyl, benzotriazolyl, stilbenyl, tetrazolyl, and group A, wherein group A is represented by the structure or R1 comprises hydrogen, alkyl group, aryl group and R2 comprises sulfonylphenyl. R3 is hydrogen, alkyl group, aryl group, a heterocyclic group or a hydrocarbon group; and Q is a 3-carbazole group; (b) a charge generating compound; and (c) an electrically conductive substrate.Type: GrantFiled: August 9, 2002Date of Patent: April 15, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katritzky, Ritu Jain, Rexiat Maimait
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Patent number: 7297449Abstract: There is provided an optical recording medium comprising a recording layer containing a charge-generating material capable of generating a first electric charge and a second electric charge by beam irradiation, the second electric charge having a different polarity from that of the first electric charge, a charge-transport material enabling at least the first electric charge to be transported to isolate the first electric charge and the second electric charge, and a trapping material retaining the first electric charge. The optical characteristics of the recording layer is changed in accordance with changes in spatial distribution of the first and second electric charges, and the trapping material is provided with a conjugated system and with at least one nitrogen-containing heterocyclic group, and bonded through an unsaturated carbon atom of the heterocyclic group to the conjugated system.Type: GrantFiled: April 21, 2006Date of Patent: November 20, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Takayuki Tsukamoto, Akiko Hirao, Kazuki Matsumoto, Hideyuki Nishizawa
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Publication number: 20070264047Abstract: An image forming apparatus having an image bearing member having a substrate and a photosensitive layer having a charge generating layer and a charge transport layer, a charging device for uniformly charging the surface of the image bearing member, an irradiating device having a light source for irradiating the image bearing member to form a latent electrostatic image thereon, a developing device for developing the latent electrostatic image, a transfer device for transferring the developed image to a recording medium and a cleaning device for cleaning the surface of the image bearing member, wherein the charge transport layer contains a charge transport material represented by the following chemical formula, the light source emits light having a wavelength not less than 600 nm and the image bearing member is not irradiated with light having a wavelength less than 600 nm, wherein R1 and R2 independently denote a hydrogen atom, a substituted or non-substituted alkyl group, a substituted or non-substituteType: ApplicationFiled: May 11, 2007Publication date: November 15, 2007Inventors: Eiji Kurimoto, Keisuke Shimoyama, Shinich Kawamura
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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: 7285366Abstract: An organic photoreceptor for an electro-photography, comprising a conductive support member and at least a light sensitive layer, and comprising a toner image forming surface of the photoreceptor having a surface roughness Ra between 0.02 ?m and 0.1 ?m and a surface roughness Rz between 0.1 ?m and 1 ?m, and an image forming apparatus comprising the same are disclosed.Type: GrantFiled: September 28, 2004Date of Patent: October 23, 2007Assignee: Konica Minolta Business Technologies, Inc.Inventors: Akihiko Itami, Shigeki Takenouchi, Satoshi Uchino
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Publication number: 20070160921Abstract: An electrophotographic photoconductor of the invention comprising: an conductive support; a light-sensitive layer formed on the conductive support and containing a charge generating material and a charge transport material; and a surface protective layer formed on the light-sensitive layer and made of a resin composition, wherein the resin composition constituting the surface protective layer contains an amine compound represented by the following formula (1): wherein R1 and R2 are, the same or different, each an alkyl group or an allyl group which may have a substituent or a heterocyclic residue to be formed through or not through a nitrogen atom or an oxygen atom together with the nitrogen atom to which R1 and R2 are bonded, R3 and R4 are, the same or different, each an alkyl group having a substituent and n denotes 1 or 2, provided that when n is 1, X is a hydrogen atom, a halogen atom, or an alkyl group, a hydroxyl group or a mercapto group which may have a substituent, or a ring optionally containingType: ApplicationFiled: December 21, 2006Publication date: July 12, 2007Applicant: Sharp Kabushiki KaishaInventors: Hiroshi Sugimura, Kotaro Fukushima, Koichi Toriyama
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Patent number: 7175956Abstract: The invention is to provide an organic photoconductive material capable of realizing electrophotographic photoreceptors of high reliability that have high charge potential, high sensitivity, good responsiveness to light and good durability, of which the characteristics do not lower even when they are driven at low temperatures or at high speed and even when they are exposed to light, and to provide an electrophotographic photoreceptor that comprises the material and an image-forming apparatus. An organic photoconductive material of the following general formula (1), for example, an enamine compound of the following structural formula (1-1) is produced.Type: GrantFiled: September 3, 2003Date of Patent: February 13, 2007Assignee: Sharp Kabushiki KaishaInventors: Takatsugu Obata, Akihiro Kondoh, Kazuya Ishida
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Patent number: 7163771Abstract: A photoconductive member containing a supporting substrate; a photogenerating layer comprised of a photogenerating component, a hole transport component, an electron transport component, and a polymer binder; and a charge transport layer comprised of a charge transport component, an electron transport component and a polymer binder.Type: GrantFiled: June 29, 2004Date of Patent: January 16, 2007Assignee: Xerox CorporationInventors: Andronique Ioannidis, Zoran D. Popovic, Nancy L. Belknap, John F. Graham, Cindy C. Chen, Peter A. Veneman
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Patent number: 7157196Abstract: Naphthalenetetracarboxylic acid diimide derivatives include a structure represented by the following formula: in which, R1, R2, and R3 are each independently any one selected from the group consisting of hydrogen; halogen; substituted or unsubstituted alkyl of C1 to C20; substituted or unsubstituted alkoxy of C1 to C20; substituted or unsubstituted aryl of C6 to C30; and substituted or unsubstituted aralkyl of C7 to C30. An electrophotographic photoconductive material includes the naphthalenetetracarboxylic acid diimide derivatives as an electron transferring material.Type: GrantFiled: February 2, 2004Date of Patent: January 2, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Seung-ju Kim, Saburo Yokota, Kyung-yol Yon, Hwan-koo Lee, Beom-jun Kim
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Patent number: 7118839Abstract: An organophotoreceptor that includes: (a) a charge transport compound having the formula where n is an integer between 2 and 6, inclusive; R1 is an aryl group; R2 is a sulfolanyl group; a pyrrolyl group; a tetrazolyl group; a benzotriazolyl group; a stilbenyl group; an alkylsulfonylphenyl group, an arylsulfonylphenyl; a pyrazolyl group; or group A, where A is with the proviso that when R2 is an alkylsulfonylphenyl group or an arylsulfonylphenyl, R1 may be hydrogen, an alkyl group, or an aryl group; X is an alkylene linking group as described in the specification; and Y is a bond, C, N, O, S, a —(CH2)p— group where p is an integer between 0 and 10, an aryl group, a cycloalkyl group, a cyclosiloxyl, a heterocyclic group, or a CR7 group where R7 is H, alkyl group, or aryl group; (b) a charge generating compound; and (c) an electrically conductive substrate.Type: GrantFiled: September 27, 2002Date of Patent: October 10, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski
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Patent number: 7060393Abstract: There is provided an optical recording medium comprising a recording layer containing a charge-generating material capable of generating a first electric charge and a second electric charge by beam irradiation, the second electric charge having a different polarity from that of the first electric charge, a charge-transport material enabling at least the first electric charge to be transported to isolate the first electric charge and the second electric charge, and a trapping material retaining the first electric charge. The optical characteristics of the recording layer is changed in accordance with changes in spatial distribution of the first and second electric charges, and the trapping material is provided with a conjugated system and with at least one nitrogen-containing heterocyclic group, and bonded through an unsaturated carbon atom of the heterocyclic group to the conjugated system.Type: GrantFiled: April 17, 2002Date of Patent: June 13, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Takayuki Tsukamoto, Akiko Hirao, Kazuki Matsumoto, Hideyuki Nishizawa
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Patent number: 7045261Abstract: In an electrophotographic photosensitive member having a support, and provided thereon a photosensitive layer, a surface layer of the electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less, and the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.Type: GrantFiled: August 26, 2003Date of Patent: May 16, 2006Assignee: Canon Kabushiki KaishaInventors: Takakazu Tanaka, Itaru Takaya, Harunobu Ogaki, Kenichi Kaku
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Patent number: 7018755Abstract: An electrophotographic photoconductor having at least a photosensitive layer on a conductive support, wherein the electrophotographic photoconductor comprising, in the outermost layer thereof: a filler, an organic compound having an acid value of 10–400 mgKOH/g, and at least one of compounds represented by the following general formulas 1 and 2: where R1, R2 are substituted or unsubstituted alkyl groups or aromatic hydrocarbon rings, and may be identical or different. R1, R2 may also be bonded together to form a substituted or unsubstituted heterocycle containing a nitrogen atom. R3, R4, R5 are substituted or unsubstituted alkyl or alkoxy groups, or halogen atoms. Ar is a substituted or unsubstituted aromatic hydrocarbon ring or aromatic heterocycle. n is an integer in the range 2 to 4, and k, l, m are respectively integers in the range 0 to 3. X is an oxygen atom, or a sulfur atom.Type: GrantFiled: September 23, 2003Date of Patent: March 28, 2006Assignee: Ricoh Company, Ltd.Inventors: Takaaki Ikegami, Tomoyuki Shimada, Yasuo Suzuki, Nozomu Tamoto, Hidetoshi Kami
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Patent number: 7001699Abstract: In an electrophotographic photosensitive member having a support, and provided thereon a photosensitive layer, a surface layer of the electrophotographic photosensitive member contains an electrically insulating binder resin and a random-copolymer type high-molecular-weight charge-transporting material having two kinds of specific repeating structural units. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.Type: GrantFiled: August 26, 2003Date of Patent: February 21, 2006Assignee: Canon Kabushiki KaishaInventors: Takakazu Tanaka, Akira Yoshida, Hidetoshi Hirano, Yuka Ishiduka, Harunobu Ogaki
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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: 6905804Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport material comprising a fluorenone hydrazone having a) at least two fluorenone alkylsulfonylphenylhydrazone groups, b) at least two fluorenone pyrrolylhydrazone groups, c) at least two fluorenone benzotriazolylhydrazone groups, d) at least two fluorenone sulfolanylhydrazone groups, e) at least two fluorenone pyrazolylhydrazone groups, f) at least two fluorenone naphthylhydrazone groups, g) at least two fluorenone tetrazolylhydrazone groups, h) at least two fluorenone stilbenylhydrazone groups, or i) at least two fluorenone (9H-fluoren-9-ylidene)benzylhydrazone groups. Some of these fluoreneones may be represented by the formula where n is an integer between 2 and 6, inclusive; R1 is hydrogen, an alkyl group, or an aryl group; R2 is an alkylsulfonylphenyl or one of its derivatives; X is a linking group.Type: GrantFiled: January 22, 2003Date of Patent: June 14, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katritzky, Ritu Jain, Rexiat Maimait
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Patent number: 6835514Abstract: Improved organophotoreceptor include: (a) a charge transport compound having the formula where R1 has a structure of: in which Ar is selected form the group consisting of; R4 is a hydrogen or an aromatic group and R2 and R3 are, independently, an (N,N-disubstituted) arylamine group; (b) a charge generating compound; and (c) an electrically conductive substrate. Additional improved charge transport compounds have the formula where R1 has a structure of and R2 is a julolidene group or a carbazole group.Type: GrantFiled: March 6, 2003Date of Patent: December 28, 2004Assignee: Samsung Electronics Co., Ltd.Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam W. Law
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Patent number: 6794102Abstract: A compound having the Formula I wherein: R1 is independently selected from the group consisting of a hetero atom containing group and a hydrocarbon group that is optionally substituted at least once with a hetero atom moiety; R2 and R3 are independently selected from the group consisting of hydrogen, a halogen, a hetero -atom containing group and a hydrocarbon group that is optionally substituted at least once with a hetero atom moiety; and R4, R5, R6, R7, R8, R9, R10 and R11 are independently selected from the group consisting of a nitrogen containing group, a sulfur containing group, a hydroxyl group, a silicon containing group, hydrogen, a halogen, a hetero atom containing group and a hydrocarbon group that is optionally substituted at least once with a hetero atom moiety.Type: GrantFiled: July 17, 2002Date of Patent: September 21, 2004Assignee: Xerox CorporationInventors: Timothy P. Bender, John F. Graham, James M. Duff
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Patent number: 6770410Abstract: 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 a charge transport component and a polymer binder substantially free of low molecular weight fractions.Type: GrantFiled: October 31, 2002Date of Patent: August 3, 2004Assignee: Xerox CorporationInventors: Robert C. U. Yu, Timothy J. Fuller, Kathleen M. Carmichael
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Publication number: 20040096761Abstract: A photoconductive imaging member containers of a supporting substrate, and thereover 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: ApplicationFiled: November 20, 2002Publication date: May 20, 2004Applicant: Xerox CorporationInventors: Liang-Bih Lin, Richard H. Nealey, Ah-Mee Hor, James M. Duff, Timothy P. Bender, Andrew R. Melnyk, Andronique Ioannidis, Harold F. Hammond, Linda L. Ferrarese, Cindy C. Chen, James M. Markovics, Kenny-Tuan T. Dinh
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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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Publication number: 20040048179Abstract: In an electrophotographic photosensitive member having a support, and provided thereon a photosensitive layer, a surface layer of the electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less, and the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.Type: ApplicationFiled: August 26, 2003Publication date: March 11, 2004Inventors: Takakazu Tanaka, Itaru Takaya, Harunobu Ogaki, Kenichi Kaku
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Publication number: 20040038140Abstract: A compound having the Formula I 1Type: ApplicationFiled: August 20, 2002Publication date: February 26, 2004Applicant: Xerox CorporationInventors: James M. Duff, John F. Graham, Timothy P. Bender, Yvan Gagnon, Andronique Ioannidis