Product Having Overlayer On Radiation-conductive Layer Patents (Class 430/66)
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Patent number: 9477164Abstract: A surface layer of an electrophotographic photosensitive member contains a cured product of a composition containing a hole transporting substance having an acryloyloxy group and/or a methacryloyloxy group and a siloxane-modified acrylic compound.Type: GrantFiled: October 14, 2014Date of Patent: October 25, 2016Assignee: Canon Kabushiki KaishaInventors: Shinji Takagi, Koichi Nakata
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Patent number: 9436108Abstract: An electrophotographic photoreceptor includes an electrically conductive support, a photosensitive layer formed on the electrically conductive support and a surface layer formed on the photosensitive layer. The surface layer contains a resin produced by polymerizing a cross-linkable polymerizable compound, N-type semiconductor fine particles and P-type semiconductor fine particles.Type: GrantFiled: March 6, 2015Date of Patent: September 6, 2016Assignee: KONICA MINOLTA, INC.Inventors: Daisuke Kodama, Toshiyuki Fujita, Hirofumi Hayata
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Patent number: 9417537Abstract: An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a urethane resin having at least six radical polymerizable functional groups and a charge transport molecule having at least one radical polymerizable functional group. The amount of the urethane resin having at least six radical polymerizable functional groups in the curable composition is about 35 percent to about 65 percent by weight. The amount of the charge transport molecules having at least one radical polymerizable functional group in the curable composition is about 35 percent to about 65 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its useful life.Type: GrantFiled: December 15, 2014Date of Patent: August 16, 2016Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Mark Thomas Bellino, David Glen Black, Weimei Luo, Scott Daniel Reeves
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Patent number: 9417538Abstract: A method of preparing a photoconductor drum having an overcoat layer is provided. The photoconductor drum is used in an electrophotographic image forming device. The photoconductor drum is prepared from a curable composition including a urethane resin having at least six radical polymerizable functional groups and a charge transport molecule having at least one radical polymerizable functional group. The amount of the urethane resin having at least six radical polymerizable functional groups in the curable composition is about 35 percent to about 65 percent by weight. The amount of the charge transport molecules having at least one radical polymerizable functional group in the curable composition is about 35 percent to about 65 percent by weight. This overcoat layer improves wear resistance of the photoconductor drum without negatively altering the electrophotographic properties, thus protecting the photoconductor drum from damage and extending its useful life.Type: GrantFiled: December 15, 2014Date of Patent: August 16, 2016Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Mark Thomas Bellino, David Glen Black, Weimei Luo, Scott Daniel Reeves
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Patent number: 9360822Abstract: An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a triphenylamine charge transport containing two ethyl acrylate functional groups and a urethane resin containing six radical polymerizable functional groups. The amount of the triphenylamine charge transport containing two ethyl acrylate functional groups in the curable composition is about 20 to about 80 percent by weight. The amount of the urethane resin containing six radical polymerizable functional groups in the curable composition is about 20 to about 80 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and ultimately providing a photoconductor with a longer useful life when compared to other organic photoconductors commercially available.Type: GrantFiled: December 13, 2013Date of Patent: June 7, 2016Assignee: LEXMARK INTERNATIONAL, INC.Inventors: David Glenn Black, Mark Thomas Bellino, James Alan Hartman, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
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Patent number: 9348253Abstract: The present invention is an image-forming method in which, when ?(A) is the contact angle relative to water of a surface of a photosensitive member and ?(B) is the contact angle relative to water of a surface of an intermediate transfer member, ?(B) is from 100° to 150°; ?(A) and ?(B) satisfy ?70°??(A)??(B)<0°; the toner has a toner particle that contains a binder resin; and the contact angle relative to water of a surface of a pellet molding of the toner is from 60° to 80°.Type: GrantFiled: October 9, 2015Date of Patent: May 24, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Ichiro Kanno, Takeshi Hashimoto, Hideki Kaneko, Masayuki Hama, Nozomu Komatsu, Takakuni Kobori, Hiroyuki Fujikawa
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Patent number: 9335712Abstract: A method applicable to an image forming apparatus with a lubricant to be applied to a surface of a photoreceptor for measuring surface roughness of the surface of the photoreceptor after lubricant application, the method including: a first step of measuring a surface profile of the photoreceptor and obtaining first data indicating the surface profile; a second step of generating second data on the basis of the first data, the second data indicating arithmetic mean roughness Ra within a predetermined range; and a third step of calculating a difference value ?Ra between second data before lubricant application and second data after lubricant application obtained by performing the first and second steps both before and after the lubricant is applied to the photoreceptor.Type: GrantFiled: March 24, 2014Date of Patent: May 10, 2016Assignee: KONICA MINOLTA, INC.Inventors: Tomohisa Yoshida, Tsugihito Yoshiyama, Yoshiki Nakane, Yohei Ito, Masanori Kawada
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Patent number: 9323151Abstract: A photosensitive oligomer for photosensitive resist comprising unsaturated double-bond group and flexible group. The monomers or compounds for synthesizing the photosensitive oligomer include unsaturated double-bond containing organic acid-based monomers, unsaturated double-bond containing organic ester-based monomers, unsaturated double-bond containing organic acid chloride/ethylene-based monomers, unsaturated double-bond containing alcohol-based compounds, and flexible group-containing silane/ether-based compounds. The present invention further provides a negative photosensitive resist resin composition comprising the photosensitive oligomer.Type: GrantFiled: June 3, 2013Date of Patent: April 26, 2016Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Wenwen Sun, Zhuo Zhang
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Patent number: 9250546Abstract: A member for electrophotography having a multilayer structure or a single-layer structure, including an outermost layer which satisfies the following A, B and C: A: the outermost layer has perfluoropolyether and a binder resin, and in the outermost layer, the ratio of the number of fluorine atoms to the number of carbon atoms is 0.10 or more and 0.40 or less; B: in a 19F-NMR spectrum of the outermost layer, the relaxation time T2 of a peak derived from CF2 moieties of perfluoropolyether is 13 milliseconds or more at 22° C.; and C: the total sum of the contents of CF3 moieties, CF2 moieties, and CF moieties in the binder resin is 5% by mass or less.Type: GrantFiled: June 24, 2014Date of Patent: February 2, 2016Assignee: Canon Kabushiki KaishaInventors: Naoto Kameyama, Kenji Onuma, Rieko Sakamoto, Yasushi Shimizu, Koichi Sato, Kimihiro Yoshimura, Akira Watanabe, Maho Tanaka, Shigeki Takishita, Hiroshi Tominaga, Keiji Karube, Takenori Sueoka
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Patent number: 9245779Abstract: A method of preparing a thin film includes coating a thin film-forming composition on a substrate, and heat-treating the coated thin film-forming composition under a pressure less than 760 Torr. The thin film includes a compact layer having a thickness in a range of greater than 50 ? to about 20,000 ? and a refractive index in a range of about 1.85 to about 2.0.Type: GrantFiled: August 3, 2012Date of Patent: January 26, 2016Assignees: Samsung Electronics Co., Ltd., Samsung Display Co., Ltd.Inventors: Myung-kwan Ryu, Jong-baek Seon, Sang-yoon Lee
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Patent number: 9188884Abstract: An organic photoconductor includes an inner charge generation layer for generating charges and an outer charge transport layer for facilitating charge transport. The charge transport layer comprises a semi-interpenetrating hole-transport polymer or oligomer network in which the polymer or oligomer is cross-linked. A process for forming a charge transport layer in an organic photoconductor is also provided.Type: GrantFiled: November 30, 2011Date of Patent: November 17, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Zhang-Lin Zhou, Krzysztof Nauka, Hou T. Ng
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Patent number: 9170507Abstract: Provided is a method of producing an electrophotographic photosensitive member including a support and a surface layer formed on the support, the method including the steps of forming a coat of a surface-layer coating solution, and drying the coat to form the surface layer, in which the surface-layer coating solution includes resin ?, resin ?, solvent ?, and compound ?.Type: GrantFiled: January 6, 2014Date of Patent: October 27, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Kazumichi Sugiyama, Daisuke Tanaka, Tsutomu Nishida
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Patent number: 9170506Abstract: In an electrophotographic photosensitive member including a support, and a photosensitive layer formed on the support, a surface layer of the electrophotographic photosensitive member includes specific resin (?), resin (?) and compound (?).Type: GrantFiled: January 2, 2014Date of Patent: October 27, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Daisuke Tanaka, Kazumichi Sugiyama, Tsutomu Nishida
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Patent number: 9164406Abstract: The charge transporting layer as the surface layer of an electrophotographic photosensitive member includes a charge transporting substances represented by any one of formulae (1) to (5), a specific compound, and a specific resin (binder resin). The specific compound is hexanol, heptanol, cyclohexanol, benzyl alcohol, ethylene glycol, 1,4-butanediol, 1,5-pentanediol, diethylene glycol, diethylene glycol ethyl methyl ether, ethylene carbonate, propylene carbonate, nitrobenzene, pyrrolidone, N-methylpyrrolidone, methyl benzoate, ethyl benzoate, benzyl acetate, ethyl 3-ethoxypropionate, acetophenone, methyl salicylate, dimethyl phthalate, or sulfolane.Type: GrantFiled: January 10, 2014Date of Patent: October 20, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Masashi Nishi, Takashi Anezaki, Kazuhisa Shida, Hirofumi Kumoi, Daisuke Tanaka, Kazumichi Sugiyama
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Patent number: 9158214Abstract: There are provided an electrophotographic photosensitive member and an intermediate transfer member each having good lubricity and good cleaning property on its surface, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and an electrophotographic apparatus including the intermediate transfer member. Therefore, a surface layer of the electrophotographic photosensitive member or intermediate transfer member of the present invention contains a matrix component and a rotatably-retained spherical particle that is not bound with the matrix component and is rotatably retained in a pore in the matrix component.Type: GrantFiled: May 30, 2012Date of Patent: October 13, 2015Assignee: Canon Kabushiki KaishaInventors: Kimihiro Yoshimura, Yohei Miyauchi, Keiko Yamagishi, Kazuhisa Shirayama, Maho Hori
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Patent number: 9129887Abstract: A non-volatile resistive switching memory device. The device includes a first electrode, a second electrode, a switching material in direct contact with a metal region of the second electrode, and a resistive material disposed between the second electrode and the switching material. The resistive material has an ohmic characteristic and a resistance substantially the same as an on state resistance of the switching device. The resistive material allows for a change in a resistance of the switching material upon application of voltage pulse without time delay and free of a reverse bias after the voltage pulse. The first voltage pulse causes a programming current to flow from the second electrode to the first electrode. The resistive material further causes the programming current to be no greater than a predetermined value.Type: GrantFiled: January 11, 2013Date of Patent: September 8, 2015Assignee: Crossbar, Inc.Inventor: Sung Hyun Jo
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Patent number: 9052619Abstract: Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising an overcoat layer which comprises a soluble filler that improves low surface energy and wear. The soluble filler is a silicone poly(ethylene glycol) ester which improves low surface energy and wear without negatively impacting electrical properties of the overcoat layer.Type: GrantFiled: October 22, 2013Date of Patent: June 9, 2015Assignee: XEROX CORPORATIONInventors: Jin Wu, Kenny-Tuan T. Dinh, Qi Ying Li, Lin Ma, Than Sorn, Marc J. LiVecchi, Linda L. Ferrarese, Robert W. Hedrick
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Patent number: 9040215Abstract: To provide an amine compound, represented by General Formula (I) below: [In General Formula (I), R1 and R2 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group, which may be identical or different; m and n are an integer of 1 or 0; Ar1 represents a substituted or unsubstituted aromatic hydrocarbon group; Ar2 and Ar3 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group; and Ar1 and Ar2 or Ar2 and Ar3 may bind to each other to form a substituted or unsubstituted heterocyclic group including a nitrogen atom.Type: GrantFiled: January 29, 2013Date of Patent: May 26, 2015Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masayoshi Nomura, Ryota Arai
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Patent number: 9034544Abstract: Provided is a compound represented by the following Formula (I): wherein in Formula (I), F represents a charge transporting skeleton, L represents a divalent linking group including a —(CH2)n—O— group, m represents an integer of from 1 to 8, and n represents an integer of from 3 to 6.Type: GrantFiled: March 5, 2012Date of Patent: May 19, 2015Assignee: FUJI XEROX CO., LTD.Inventors: Katsumi Nukada, Wataru Yamada, Tomoya Sasaki, Yuko Iwadate, Kenji Kajiwara
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Patent number: 9017909Abstract: The present disclosure is drawn to electrostatic printing. In an example, a coated photoconductive substrate can comprise a photoconductive substrate, the photoconductive substrate including a substrate having a charge generation layer and charge transport layer adhered thereto; and a top coating adhered to the photoconductive substrate. The top coating can comprise a cross-linkable polymer, a cross-linker, and a charge transport material, where the charge transport material is dispersed throughout the top coating and may be present in the top coating in an amount ranging from 20 wt % to 50 wt %.Type: GrantFiled: April 30, 2012Date of Patent: April 28, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Sivapackia Ganapathiappan, Krzysztof Nauka, Hou T. Ng
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Patent number: 9005855Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate; a charge generating layer provided on the conductive substrate; a charge transporting layer provided on the charge generating layer; and an outermost surface layer provided on the charge transporting layer, wherein the charge transporting layer includes a charge transporting material and a polycarbonate copolymer having a solubility parameter as calculated by a Feders method of from 11.40 to 11.75, and the outermost surface layer includes a charge transporting material, fluorine-containing resin particles, and a fluorine-containing dispersant.Type: GrantFiled: April 22, 2013Date of Patent: April 14, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Yuko Iwadate, Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Tomoya Sasaki, Kenji Kajiwara
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Patent number: 8993206Abstract: An electrophotographic photoreceptor includes a conductive substrate, an organic photosensitive layer that is provided on the conductive substrate, and an inorganic protective layer that is provided on the organic photosensitive layer, wherein the inorganic protective layer includes a first layer, a second layer, and a third layer in this order from the organic photosensitive layer side and satisfies the relationship of the following expression (1): ?3??1<?2??Expression (1): wherein ?1 represents a volume resistivity (?·cm) of the first layer, ?2 represents a volume resistivity (?·cm) of the second layer, and ?3 represents a volume resistivity (?·cm) of the third layer.Type: GrantFiled: April 3, 2013Date of Patent: March 31, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Takeshi Iwanaga, Masaki Hirakata, Hideya Katsuhara, Tomoya Sasaki, Nobuyuki Torigoe, Takashi Imai
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Patent number: 8980511Abstract: An organic photoconductor includes a conductive substrate; a charge generation layer over the conductive substrate; a charge transport layer over the charge generation layer; and an overcoat layer over the charge transport layer. The overcoat layer comprises a cross-linked polyacrylate that includes a charge transport material dispersed therein and a polyhedral oligomeric silsesquioxane.Type: GrantFiled: November 8, 2012Date of Patent: March 17, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Zhang-Lin Zhou, Krzysztof Nauka, Lihua Zhao, Anthony William McLennan
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Patent number: 8980509Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component ? and a component ?, and a domain comprising a component ?.Type: GrantFiled: November 25, 2011Date of Patent: March 17, 2015Assignee: Canon Kabushiki KaishaInventors: Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda, Shio Murai, Harunobu Ogaki
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Patent number: 8962226Abstract: An organic photoreceptor, comprises: a conductive support; a photosensitive layer provided on the conductive support; and a protective layer provided on the photosensitive layer, wherein the protective layer contains alumina particles which contain 2 to 50 ppm of phosphorus atoms and is subjected to a surface treatment with a compound A having a reactive functional group and a curable compound B, and the protective layer is a cured layer including a cured product material formed by at least the compound A on the surfaces of the alumina particles and the curable compound B.Type: GrantFiled: August 10, 2010Date of Patent: February 24, 2015Assignee: Konica Minolta, Inc.Inventors: Seisuke Maeda, Takeshi Ishida, Masahiko Kurachi, Toshiyuki Fujita, Seijiro Takahashi
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Patent number: 8962225Abstract: A charge transporting film includes a cured film of a composition containing at least one selected from reactive compounds represented by the following Formula (I): wherein F represents a charge transporting skeleton, D represents a group represented by Formula (IIa), m represents an integer of from 1 to 8, E represents a group represented by Formula (IIb), L represents a (n+1)-valent linking group including two or more selected from the group consisting of an alkylene group, an alkenylene group, —C(?O)—, —N(R)—, —S—, —O—, and a trivalent or tetravalent group derived from alkane or alkene, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, n represents an integer of from 1 to 3, R0 represents a halogen atom, an alkyl group, or an alkoxy group, and n0 represents an integer of from 0 to 3.Type: GrantFiled: April 11, 2013Date of Patent: February 24, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Tomoya Sasaki, Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Kenji Kajiwara, Yuko Iwadate
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Patent number: 8962227Abstract: An electrophotographic photosensitive member that includes the outermost surface layer formed by curing a mixture of a charge transporting substance having a chain-polymerizable functional group and a urea compound represented by the following formula (1) or (2), and a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member.Type: GrantFiled: May 22, 2012Date of Patent: February 24, 2015Assignee: Canon Kabushiki KaishaInventors: Masato Tanaka, Masaki Nonaka
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Patent number: 8951703Abstract: An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a urethane resin having at least six radical polymerizable functional groups. The at least six radical polymerizable functional groups may include acrylate group, methacrylate group, styrenic group, allylic group, vinylic group, glycidyl ether group, epoxy group, or combinations thereof. This overcoat layer has an improved wear resistance, thus protecting the organic photoconductor drum from damage and extending its useful life.Type: GrantFiled: December 31, 2012Date of Patent: February 10, 2015Assignee: Lexmark International, Inc.Inventors: Scott Daniel Reeves, David Glen Black
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Patent number: 8940466Abstract: An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from an (UV) ultraviolet curable composition including a urethane resin having at least six radical polymerizable functional groups and a charge transport molecule having at least one radical polymerizable functional group. The amount of the urethane resin having at least six radical polymerizable functional groups in the curable composition is about 35 percent to about 65 percent by weight. The amount of the charge transport molecules having at least one radical polymerizable functional group in the curable composition is about 35 percent to about 65 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its useful life.Type: GrantFiled: December 31, 2012Date of Patent: January 27, 2015Assignee: Lexmark International, Inc.Inventors: Mark Thomas Bellino, David Glen Black, Weimei Luo, Scott Daniel Reeves
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Patent number: 8921020Abstract: Provided is an electrophotographic photosensitive member, including: a support; and a photosensitive layer, which is provided on the support, in which: a surface layer of the electrophotographic photosensitive member includes a terminal siloxane-containing polyester resin having a specific structure; and a lower layer provided in contact with the surface layer includes a polycarbonate resin, a polyester resin, or a polyvinyl acetal resin, having a specific structure.Type: GrantFiled: October 25, 2011Date of Patent: December 30, 2014Assignee: Canon Kabushiki KaishaInventors: Shio Murai, Harunobu Ogaki, Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda
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Patent number: 8900781Abstract: An electrophotographic photoreceptor belt which is excellent in durability and therefore little cracks even when fingerprints of an operator or hand cream adheres to the belt, wherein a binder resin for photosensitive layers comprising as the main component a polycarbonate resin which comprises bisphenol A type constituent units represented by the formula (I) as the main constituent unit (preferably in an amount of at least 90% by weight based on the whole of the constituent units) and which has a limiting viscosity of 1 to 1.6 dl/g and preferably a molecular weight distribution of 3.2 to 4.3 as calculated from the weight-average molecular weight and number-average molecular weight determined by GPC is used in a photosensitive layer (particularly carrier transport layer) of the belt.Type: GrantFiled: August 21, 2007Date of Patent: December 2, 2014Assignee: Mitsubishi Gas Chemical Company, Inc.Inventor: Noriyoshi Ogawa
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Patent number: 8900783Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; a photosensitive layer that is provided on the electroconductive substrate; and an outermost surface layer, wherein the outermost surface layer is a layer made of a cured product of a composition that contains position isomer mixture of at least one kind among non-charge transporting compounds represented by Formulae (I) and (II) and at least one kind among non-reactive charge transporting materials.Type: GrantFiled: August 22, 2013Date of Patent: December 2, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Yuko Iwadate, Kenji Kajiwara
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Publication number: 20140349227Abstract: An organic photoconductor includes: a conductive substrate; a charge generation layer formed on the conductive substrate; a charge transport layer formed on the charge generation layer; and a protective coating formed on the charge transport layer. The protective coating comprises nanoparticles incorporated in an in-situ cross-linked polymer matrix. A process for increasing mechanical strength in an organic photoconductor is also provided.Type: ApplicationFiled: March 30, 2012Publication date: November 27, 2014Inventors: Krzysztof Nauka, Zhang-Lin Zhou, Lihua Zhao
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Patent number: 8895216Abstract: An image forming apparatus includes an electrophotographic photoreceptor having a photosensitive layer, and a surface protective layer that contains fluororesin particles and a fluorinated alkyl group-containing copolymer; a charging unit that charges the surface of the electrophotographic photoreceptor; an electrostatic latent image forming unit that forms an electrostatic latent image; a developing unit that accommodates a developer, and develops the electrostatic latent image with the developer to form a toner image; a transfer unit that transfers the toner image to a recording medium; and a cleaning unit that removes the remained developer, wherein when the electrophotographic photoreceptor is rotated 50,000 times by repeating the formation of an image having image sections and non-image sections and having an image density of 7%, and then the surface of the electrophotographic photoreceptor is analyzed by X-ray photoelectron spectroscopy, the zinc coating ratio is in the range of from 50% to 100%.Type: GrantFiled: May 1, 2012Date of Patent: November 25, 2014Assignee: Fuji Xerox Co., Ltd.Inventor: Daisuke Haruyama
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Patent number: 8889325Abstract: The invention provides a means for improving the abrasion resistance and the scratch resistance of a protection layer by increasing the surface hardness of the protection layer of an organic photoreceptor. The invention is an organic photoreceptor constituted by laminating on an electroconductive substrate, a photosensitive layer and a protection layer successively, wherein the protection layer comprises a charge transport substance represented by the following general formula (1), a resin component obtained by curing a curable compound and tin oxide treated with a surface preparation agent having a reactive organic group, and a silica particle: in the general formula (1), R1 and R2 are each independently hydrogen atoms or methyl groups, and R3 is a straight-chain or branched alkyl group having 1 to 5 carbon atoms.Type: GrantFiled: May 2, 2013Date of Patent: November 18, 2014Assignee: Konica Minolta, Inc.Inventors: Mari Konishi, Keiichi Inagaki, Toshiyuki Fujita
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Patent number: 8883384Abstract: Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising a binderless overcoat layer which exhibits substantially improved electrical performance, such as low residual potential and good electrical cyclic stability. The overcoat layer of the present embodiments is formed from a formulation comprising a small transport molecule, a crosslinking agent, an acid catalyst and a solvent.Type: GrantFiled: September 25, 2009Date of Patent: November 11, 2014Assignee: Xerox CorporationInventors: Kenny-tuan T. Dinh, Edward C. Savage, Marc J. LiVecchi, Robert W. Hedrick, Linda L. Ferrarese, Sherri A. Toates, Stacy J. Kowsz
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Patent number: 8877413Abstract: The presently disclosed embodiments relate generally to a flexible imaging member having a novel ground strip layer. The flexible imaging member may have a full flexible imaging member structure with an anticurl backing coating (ACBC) as well as a structurally simplified flexible imaging member being ACBC-free.Type: GrantFiled: August 23, 2011Date of Patent: November 4, 2014Assignee: Xerox CorporationInventor: Robert C. U. Yu
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Publication number: 20140322638Abstract: An alcohol-soluble organic coating including a hole transport material formed on a surface of organic photoconductor is provided. The coating comprises a cationic alternate fluorene-based copolymer with phosphonium salt terminal groups embedded in an in-situ cross-linked polymer.Type: ApplicationFiled: December 20, 2011Publication date: October 30, 2014Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Zhang-Lin Zhou, Krzysztof Nauka, Lihua Zhao
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Patent number: 8865382Abstract: An electrophotographic photosensitive member having a surface layer containing a polymeric product obtained by polymerizing a specific adamantane compound, a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member, and a process for producing the electrophotographic photosensitive member.Type: GrantFiled: May 6, 2011Date of Patent: October 21, 2014Assignee: Canon Kabushiki KaishaInventors: Masaki Nonaka, Masato Tanaka
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Patent number: 8859173Abstract: An electrophotographic photoreceptor is disclosed, in which an outermost surface layer of the electrophotographic photoreceptor is made of a cured film of a composition including a compound represented by the following Formula (M1) and a charge transporting material having a chain polymerizable functional group:Type: GrantFiled: August 16, 2010Date of Patent: October 14, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Wataru Yamada, Katsumi Nukada, Takatsugu Doi, Tsuyoshi Miyamoto, Kenya Sonobe
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Patent number: 8859174Abstract: An electrophotographic photosensitive member has a surface layer that contains a urea compound having two or more urea moieties. Each of the urea moieties has a carbonyl group and two nitrogen atoms. Each of the two nitrogen atoms connects to an alkyl group and a substituted or unsubstituted aryl group or a substituted or unsubstituted arylene group.Type: GrantFiled: May 22, 2012Date of Patent: October 14, 2014Assignee: Canon Kabushiki KaishaInventors: Masaki Nonaka, Masato Tanaka
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Patent number: 8852833Abstract: Imaging members having a support, an imaging layer disposed on the support, an outer layer disposed on the imaging layer and fluoropolymer particles imbedded in an outer surface of the outer layer. Image forming apparatuses having such imaging members. Processes for preparing an imaging member for an electrophotographic apparatus, the process involving coating an imaging layer with an outer layer formulation. The imaging layer can be disposed on a support. The outer layer formulation can be dried to form an outer layer disposed on the imaging layer and has an outer surface. Fluoropolymer particles are applied to the outer layer.Type: GrantFiled: April 27, 2012Date of Patent: October 7, 2014Assignee: Xerox CorporationInventors: Gregory McGuire, Richard Klenkler, Yvan Gagnon, Yu Liu
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Patent number: 8846281Abstract: An electrophotographic photosensitive member having a surface layer which contains a silicon-containing compound in an amount of less than 0.6% by mass based on the whole solid content in the surface layer, where the silicon-containing compound in the surface layer has a siloxane moiety in an amount of 0.01% by mass or more, based on the whole solid content in the surface layer, and its surface has specific depressions. Also disclosed are a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member.Type: GrantFiled: September 24, 2009Date of Patent: September 30, 2014Assignee: Canon Kabushiki KaishaInventors: Atsushi Okuda, Hirotoshi Uesugi, Kazunori Noguchi, Tsutomu Nishida
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Patent number: 8841053Abstract: An organic photoconductor includes: a conductive substrate; a charge generation layer on the conductive substrate; and a charge transport layer on the charge generation layer. An overcoat layer is formed on the charge transport layer. The overcoat layer is a latex polymer in which a charge transport material is dispersed.Type: GrantFiled: July 19, 2012Date of Patent: September 23, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Zhang-Lin Zhou, Krzysztof Nauka, Lihua Zhao, Hou T. Ng
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Patent number: 8835084Abstract: An electrophotographic photoreceptor including an electroconductive substrate, a charge generation layer located overlying the electroconductive substrate, a hole transport layer located on the charge generation layer, and a hole transport protective layer located on the hole transport layer. The hole transport protective layer includes a three-dimensionally crosslinked material obtained by irradiating a composition including at least a radically polymerizable hole transport compound with ultraviolet rays or electron beams so that the radically polymerizable hole transport compound causes chain polymerization. In addition, the protective layer includes a specific cyano-containing styryl aromatic compound or a specific cyano-containing distyryl aromatic compound.Type: GrantFiled: September 22, 2011Date of Patent: September 16, 2014Assignee: Ricoh Company, Ltd.Inventors: Kazukiyo Nagai, Tetsuro Suzuki, Hongguo Li
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Patent number: 8822114Abstract: An electrophotographic photoreceptor includes a substrate; a photosensitive layer that is provided on the substrate; and a surface layer that is provided on the photosensitive layer, contains fluororesin particles, is a single layer having a thickness of 3 ?m or greater, and has a cross-section, taken along a thickness direction thereof, which satisfies specific expressions.Type: GrantFiled: September 21, 2012Date of Patent: September 2, 2014Assignee: Fuji Xerox Co., Ltd.Inventor: Shinya Yamamoto
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Patent number: 8822115Abstract: An electrophotographic photoreceptor includes a conductive substrate, a photosensitive layer, and a surface layer that is provided on the photosensitive layer. The surface layer includes a cross-linked component which is a reaction product of compound A and compound B. The compound A is at least one compound selected from guanamine compounds and melamine compounds, and the compound B is a charge-transporting material. A structure derived from at least one compound selected from the guanamine compounds and the melamine compounds included in the surface layer amounts for 0.1% by weight to 5% by weight, and a structure derived from the charge-transporting material included in the surface layer amounts for 85% by weight or greater. Surface roughness Rz of the surface layer is from 0.1 ?m to 0.3 ?m, and the surface has at least one compound selected from fatty acid metal salt and fluorine resin particles.Type: GrantFiled: September 25, 2012Date of Patent: September 2, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Yuko Yamano, Daisuke Haruyama, Shinya Yamamoto
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Patent number: 8815481Abstract: An imaging member includes a supporting substrate, an optional hole blocking layer, an optional adhesive layer, an imaging layer, and an overcoat layer, wherein the overcoat layer comprises a fluorosulfonamide. The overcoat layer can further include a charge transport compound and a melamine resin.Type: GrantFiled: September 26, 2012Date of Patent: August 26, 2014Assignee: Xerox CorporationInventors: Jin Wu, David Skinner, Than Sorn, Lin Ma, Lanhui Zhang, Marissa Anne Linne, J. Robinson Cowdery-Corvan, Kenny-tuan T. Dinh
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Patent number: 8808950Abstract: An electrophotographic photoreceptor includes a substantially cylindrical support and a coating disposed on the support and including a photosensitive layer. The coating has lines due to polishing extending in a direction crossing a circumferential direction of a surface of the photoreceptor in at least part of a region outside an effective region available for image formation in an axial direction.Type: GrantFiled: May 17, 2012Date of Patent: August 19, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Yuichi Fujisawa, Masami Tanase, Keiichi Aoyagi
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Patent number: 8802339Abstract: An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a urethane methacrylate functional charge transport molecule, and a photoinitiator. The urethane acrylate functional charge transport molecule is a reaction product of hydroxyl functional charge transport molecule and a monomer having an isocyanate group and an acrylate group. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its useful life.Type: GrantFiled: December 31, 2012Date of Patent: August 12, 2014Assignee: Lexmark International, Inc.Inventor: Scott Daniel Reeves