Applying Overlayer Patents (Class 430/132)
-
Patent number: 7572561Abstract: An imaging member with a unique overcoat composition adapted for forming protective, scratch-resistant overcoats is disclosed. The overcoat composition comprises a binder component that includes particular proportions of a acrylated polyol and propylene glycol. The overcoat composition also comprises a transport agent and a crosslinking agent.Type: GrantFiled: February 22, 2006Date of Patent: August 11, 2009Assignee: Xerox CorporationInventors: Kenny-Tuan Dinh, Dale S. Renfer, Kendra M. Giza, Michael L. Mehan, Susan M. Vandusen, Markus R. Silvestri, John F. Yanus
-
Publication number: 20090186287Abstract: Disclosed is an electrophotographic photoreceptor having a protective overcoat layer including a polyol binder; a hole transport material; a curing agent; and a surface-treated tin oxide particle filler. Also disclosed is a process for forming a photoreceptor that includes providing a photoreceptor substrate; applying a charge generating layer; applying a charge transport layer; and applying a protective overcoating layer over the substrate; such that the protective overcoat layer includes a polyol binder; a hole transport material; a curing agent; and a surface-treated tin oxide particle filler. Also included is a method of forming an image, including the disclosed photoreceptor.Type: ApplicationFiled: January 23, 2008Publication date: July 23, 2009Applicant: XEROX CORPORATIONInventors: Kathy L. DE JONG, Yu QI, Vladislav SKOROKHOD, Nan-Xing HU, Johann JUNGINGER, Markus SILVESTRI, John F. YANUS, Kenny-Tuan DINH
-
Patent number: 7553594Abstract: An electrophotographic photosensitive member having excellent electrophotographic properties, a method of manufacturing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are provided. The surface layer of the electrophotographic photosensitive member includes a polymer having a specific repeating structural unit and fluorine-atom-containing resin particles. The fluorine-atom-containing particles in the surface layer are dispersed so as to be provided with particle sizes almost up to those of primary particles.Type: GrantFiled: April 15, 2008Date of Patent: June 30, 2009Assignee: Canon Kabushiki KaishaInventors: Harunobu Ogaki, Nobumichi Miki, Kazunori Noguchi, Nobuo Kosaka
-
Patent number: 7541125Abstract: An embodiment may be an organic photoreceptor, which comprises a conductive support; a photosensitive layer provided on the conductive support; and a surface layer containing a binder and a fluorine-containing resin fine particle having a number average primary particle diameter between about 0.02 ?m and about 0.20 ?m and a crystallinity of less than 90% and a binder resin; wherein a contact angle of the surface layer for water is 90° or more and a dispersion of the contact angle is within ±2.0°.Type: GrantFiled: February 18, 2005Date of Patent: June 2, 2009Assignee: Konica Minolta Business Technologies, Inc.Inventors: Keiichi Inagaki, Nobuaki Kobayashi, Shigeaki Tokutake
-
Publication number: 20090130576Abstract: An electrophotographic photosensitive member having excellent electrophotographic properties, a method of manufacturing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are provided. The surface layer of the electrophotographic photosensitive member includes a polymer having a specific repeating structural unit and fluorine-atom-containing resin particles. The fluorine-atom-containing particles in the surface layer are dispersed so as to be provided with particle sizes almost up to those of primary particles.Type: ApplicationFiled: January 14, 2009Publication date: May 21, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Harunobu Ogaki, Nobumichi Miki, Kazunori Noguchi, Nobuo Kosaka
-
Patent number: 7524598Abstract: Disclosed is an electrophotographic photoreceptor. The electrophotographic photoreceptor includes an organic photoreception layer that is formed on a conductive base and includes at least polycarbonate. An outermost surface of the organic photoreception layer has been subjected to surface treatment using plasma of gas including hydrogen, or hydrogen and nitrogen.Type: GrantFiled: November 13, 2006Date of Patent: April 28, 2009Assignee: Fuji Xerox Co., Ltd.Inventors: Takeshi Iwanaga, Shigeru Yagi
-
Patent number: 7521165Abstract: A varnish composition and the method of making a varnish composition comprising at least one latex emulsion, water, at least one amino alcohol or at least one alkali base and at least one surfactant.Type: GrantFiled: April 5, 2006Date of Patent: April 21, 2009Assignee: Xerox CorporationInventors: Christine D Anderson, T Brian McAneney, Gordon Sisler, Kurt I Halfyard
-
Publication number: 20090004588Abstract: Photoconductor structure processing methods and imaging device photoconductor structures are described. According to one embodiment, a photoconductor structure processing method includes processing a photoconductor structure of an imaging device and wherein the photoconductor structure comprises charge transport material configured to conduct electrical charges generated responsive to reception of light to form a latent image during an electro-photographic imaging process, the processing comprising removing at least some of the charge transport material from at least a portion of the photoconductor structure. The photoconductor structure may also be further treated to reduce the migration of charge transport material. Additional embodiments are described in the disclosure.Type: ApplicationFiled: June 27, 2007Publication date: January 1, 2009Inventors: Xia Sheng, Hou T. Ng
-
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
-
Publication number: 20080311496Abstract: An image forming medium includes a substrate; an imaging layer including an imaging material coated on said substrate, wherein the imaging material exhibits a reversible transition between a colorless state and a colored state; and a protective layer over the imaging layer, the protection layer including dipolar molecules that can be reversibly switch between a UV light transmission state and a UV light absorption state, wherein the dipolar molecules in their random orientation absorb in substantially the same spectral region as the imaging material in its un-imaged state, and wherein the imaging layer is imageable by ultraviolet light when the dipolar molecules are in the UV light transmission state, but the imaging layer is substantially not imageable by ultraviolet light when the dipolar molecules are in the UV light absorption state.Type: ApplicationFiled: June 13, 2007Publication date: December 18, 2008Applicant: XEROX CORPORATIONInventors: Gabriel IFTIME, Hadi K. MAHABADI, Peter M. KAZMAIER
-
Patent number: 7449272Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; and a photosensitive layer overlying the electroconductive substrate, which includes a crosslinked layer at the surface thereof, wherein the crosslinked layer is formed by a method including: coating a coating liquid, which includes a solvent; a radical polymerizing monomer having three or more functional groups and no charge transportable structure; and a radical polymerizing compound having a charge transportable structure on the photosensitive layer; and irradiating the coating liquid to be hardened while the surface of the photosensitive layer is controlled to have a temperature not higher than a boiling point of the solvent.Type: GrantFiled: November 15, 2005Date of Patent: November 11, 2008Assignee: Ricoh Company, Ltd.Inventors: Yoshiaki Kawasaki, Tetsuro Suzuki, Hiroshi Ikuno, Tetsuya Toshine
-
Publication number: 20080199794Abstract: An electrophotographic photosensitive member having excellent electrophotographic properties while being prevented from the generation of blade turn-up, a method of manufacturing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are provided. The surface layer of the electrophotographic photosensitive member contains a polymer having a specific repeating structural unit.Type: ApplicationFiled: April 15, 2008Publication date: August 21, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Hirotoshi Uesugi, Yukihiro Abe, Daisuke Miura, Nobumichi Miki, Harunobu Ogaki
-
Patent number: 7413840Abstract: A production method of an electrophotographic photosensitive member which has high productivity when producing a surface layer in which depressed portions which are independent respectively are formed on an electrophotographic photosensitive member surface, and can produce highly uniform depressed portions in a photosensitive member surface, characterized by producing the surface layer by (1) a coating step of producing a coating liquid for a surface layer containing a binder resin and a specific solvent, and coating it on a surface of a cylindrical supporting member, (2) a condensation step of holding the cylindrical supporting member on which the coating liquid for a surface layer is coated, and condensing the surface of the cylindrical supporting member, and (3) a drying step of baking the cylindrical supporting member.Type: GrantFiled: June 28, 2007Date of Patent: August 19, 2008Assignee: Canon Kabushiki KaishaInventors: Harunobu Ogaki, Atsushi Ochi
-
Publication number: 20080166654Abstract: This method to make an original photoconductor or replacement element uses a two-slot coating process to substantially simultaneously deposit a new SMTL coating layer and a thinner overcoating on an already existing SMTL layer or on a substrate. The total thickness of the existing SMTL layer plus the new SMTL layer plus the overcoating thickness should not exceed the thickness of a belt area of a marking machine or corresponding components in the to be replaced photoconductor element or the tolerances set for said SMTL and overcoating layer when making a new belt.Type: ApplicationFiled: November 1, 2006Publication date: July 10, 2008Inventor: Robert J. Meyer
-
Patent number: 7384717Abstract: An electrophotographic imaging member includes a substrate, a charge generating layer, a charge transport layer, and an overcoating layer, the overcoating layer including a cured polyester polyol or cured acrylated polyol film forming resin and a charge transport material.Type: GrantFiled: September 26, 2005Date of Patent: June 10, 2008Assignee: Xerox CorporationInventors: Kenny-Tuan T Dinh, John F Yanus, Kendra M Giza, James R Backus, T Edwin Freeman, Markus R Silvestri, Michael L Mehan
-
Publication number: 20080107980Abstract: A coating composition having a polymer resin composition containing at lest an acid catalyst and a masking agent, wherein the masking agent is selected from the group consisting of compound A, compound B, and the acylated derivatives of compound A, where compound A is given by the structural formula (I): where X represents a substituent selected from the group consisting of —OR and —NR?R?, wherein R, R?, and R? each independently represent a hydrogen atom or a hydrocarbyl group; and compound B is given by the structural formula (II): where Y and Z independently represent —OH or —NH2.Type: ApplicationFiled: November 6, 2006Publication date: May 8, 2008Applicant: Xerox CorporationInventors: Kathy L. De Jong, Hany Aziz, Nan-Xing Hu
-
Publication number: 20080102388Abstract: A photoreceptor with a substrate, a charge generating layer, a charge transport layer including N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, having a purity of from about 95 percent to about 100 percent, and a protective overcoating layer, optionally including a hole transport material other than N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, that will discharge form about 85% to about 100% of its surface potential in from 0 to about 40 milliseconds upon being subjected to xerographic charging and exposure to radiant energy of from about 1 erg/cm2 to about 5 ergs/cm2.Type: ApplicationFiled: May 31, 2007Publication date: May 1, 2008Applicant: XEROX CORPORATIONInventors: Hany Aziz, Gregory McGuire, Jennifer A. Coggan, Johann Junginger, Kathy L. De Jong, Ah-Mee Hor, Nan-Xing HU
-
Publication number: 20080070137Abstract: An electrophotographic imaging member comprises a substrate, an electrophotographic imaging layer and an overcoat layer comprising a cross-linkable polymer and a hole transport material, wherein the overcoat layer provides at least one of solvent resistance and hydrocarbon resistance to the electrophotographic imaging layer.Type: ApplicationFiled: September 14, 2006Publication date: March 20, 2008Inventors: John F. Yanus, Kenny-Tuan T. Dinh, Dale S. Renfer, Nancy L. Belknap, Anthony M. Horgan
-
Publication number: 20080063960Abstract: An electrophotographic photoreceptor comprising a photosensitive layer and a protective layer is disclosed. The protective layer comprises a resin which is prepared by allowing at least two acrylic or methacrylic compounds to react, and the acrylic or methacrylic compounds include a minimum acryloyl equivalent compound having minimum acryloyl equivalent and a maximum acryloyl equivalent compound having maximum acryloyl equivalent and relationships 1) and 2) are satisfied; 100?maximum acryloyl equivalent?minimum acryloyl equivalent?400 ??1) 0.1?weight of minimum acryloyl equivalent compound/weight of maximum acryloyl equivalent compound?1.6.Type: ApplicationFiled: August 3, 2007Publication date: March 13, 2008Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hirofumi HAYATA, Masahiko KURACHI, Kunihiro OGURA
-
Patent number: 7341814Abstract: An electrophotographic photoconductor includes an electroconductive substrate, a photoconductive layer arranged over the electroconductive layer with or without the interposition of an undercoat layer, and a surface top layer containing a crosslinkable resin arranged over the photoconductive layer, the photoconductive layer includes a charge generation layer containing a charge generating material, and a charge transport layer containing a charge transporting material, in which the surface top layer is substantially free from hydroxyl groups and residual uncured portions.Type: GrantFiled: January 7, 2005Date of Patent: March 11, 2008Assignee: Ricoh Company, Ltd.Inventors: Hidetoshi Kami, Naohiro Toda, Yoshiaki Kawasaki, Maiko Kondo, Ryoichi Kitajima, Narihito Kojima, Hiroshi Nagame
-
Patent number: 7341813Abstract: The present invention provides an electrophotographic photoreceptor and an electrophotographic member, which have superior mold releasing and sliding properties and are able to maintain these properties over long periods of time, the photoreceptor comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer, the electrophotographic member comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer and filling voids in the first layer, and further provides a process cartridge equipped with said electrophotographic photoreceptor or said electrophotographic member, and an image forming apparatus.Type: GrantFiled: June 2, 2004Date of Patent: March 11, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Satoshi Shigezaki, Hiroe Okuyama, Takahiro Suzuki, Katsumi Nukada, Eiji Funabashi
-
Publication number: 20080038649Abstract: An electrophotographic photoreceptor, including: an electroconductive substrate; a photosensitive layer located overlying the electroconductive substrate; and a crosslinked surface layer located overlying the photosensitive layer, including: a tri- or more functional radical polymerizable monomer having no charge transport structure; and a radical polymerizable compound having a charge transport structure, wherein the crosslinked surface layer has a surface roughness (Ra) not greater than 0.2 ?m and a peel strength not less than 0.2 N/mm when measured by the SAICAS method.Type: ApplicationFiled: August 6, 2007Publication date: February 14, 2008Inventors: Mitsuaki HIROSE, Yoshiaki Kawasaki, Yoshiki Yanagawa
-
Patent number: 7316876Abstract: Disclosed is an electrophotographic photoreceptor which comprises a layer on a support, wherein the photoreceptor satisfies a condition represented by Formulas 1 and 2; 0<Pmax<2PFormula 1 2?(Pmax/D)×100?50Formula 2 wherein P represents an average of the layer thickness in ?m at the central position in the width direction of image forming area of the support, Pmax represents is an average of the largest value of the layer thickness in ?m without the image forming area, D represents an average of the distance in ?m from the point where the largest value is formed to the edge of the layer and a image forming method and an apparatus using the same.Type: GrantFiled: June 7, 2004Date of Patent: January 8, 2008Assignee: Konica Minolta Holdings, Inc.Inventor: Nobuaki Kobayashi
-
Patent number: 7312008Abstract: An imaging member includes a substrate, a charge generating layer, and a charge transport layer, wherein an external of the imaging member includes a polyhedral oligomeric silsesquioxane modified silicone dispersed therein.Type: GrantFiled: February 10, 2005Date of Patent: December 25, 2007Assignee: Xerox CorporationInventors: Jin Wu, Yuhua Tong, John J. Wilbert, Liang-bih Lin, Jennifer Y. Hwang, Timothy J. O'Brien, Anthony Uttaro, Jr., Linda L. Ferrarese
-
Patent number: 7309551Abstract: An imaging member includes a substrate, a charge generating layer, a charge transport layer, and an outer overcoat layer including an electron conductive material.Type: GrantFiled: March 8, 2005Date of Patent: December 18, 2007Assignee: Xerox CorporationInventors: Yuhua Tong, John F. Yanus, Anthony M. Horgan, T. Edwin Freeman, Jin Wu
-
Publication number: 20070287085Abstract: Disclosed is an electrophotographic photoreceptor. The electrophotographic photoreceptor includes an organic photoreception layer that is formed on a conductive base and includes at least polycarbonate. An outermost surface of the organic photoreception layer has been subjected to surface treatment using plasma of gas including hydrogen, or hydrogen and nitrogen.Type: ApplicationFiled: November 13, 2006Publication date: December 13, 2007Inventors: Takeshi Iwanaga, Shigeru Yagi
-
Publication number: 20070281228Abstract: An electrophotographic imaging member includes a substrate, a charge generating layer, a charge transport layer, and an overcoating layer, the overcoating layer being a cured film formed from a composition including at least a hydroxyl group-containing polymer or oligomer, a benzoguanamine compound containing at least one —CH2OR group, wherein each such R is independently an H atom or an alkyl group having from 1 to about 20 carbon atoms, and a charge transport compound.Type: ApplicationFiled: June 1, 2006Publication date: December 6, 2007Applicant: XEROX CORPORATIONInventors: Nan-Xing Hu, Kathy L. De Jong, Hany Aziz
-
Publication number: 20070269728Abstract: There is provided: an electrophotographic photoreceptor including a photosensitive layer and a surface layer laminated on a conductive substrate in this order, the photosensitive layer including an organic substance, the surface layer including a group 13 element and nitrogen, a thickness of the surface layer being from about 0.01 ?m to less than about 1 ?m, and a center line average roughness (Ra) of a surface of the surface layer being about 0.01 ?m or less; a manufacturing method thereof; a process cartridge; and an image forming device.Type: ApplicationFiled: November 8, 2006Publication date: November 22, 2007Applicant: FUJI XEROX CO., LTD.Inventor: Shigeru Yagi
-
Patent number: 7279506Abstract: Ink jettable, radiation curable overprint compositions containing at least one radiation curable oligomer/monomer, at least one photoinitiator, and at least one surfactant are disclosed. The overprint compositions are particularly well-suited for protecting ink-based and toner-based images on substrates subjected to abrasives, heat, and/or sunlight since the compositions protect such images from smearing, cracking, and fading.Type: GrantFiled: May 5, 2004Date of Patent: October 9, 2007Assignee: Xerox CorporationInventors: Gordon Sisler, Kurt I. Halfyard, T. Brian McAneney, Peter G. Odell, Chris Wagner
-
Publication number: 20070224528Abstract: To provide an image bearing member protecting agent that includes at least a hydrophobic organic compound and an amphiphile organic compound. Preferred embodiments are that the hydrophobic organic compound is a hydrocarbon wax, and the hydrocarbon wax is at least a wax selected from normal paraffins, isoparaffins, and cycloparaffins; and that the amphiphile organic compound is an polyalcohol esterified compound including a nonionic surface active surfactant, and the nonionic surface active surfactant is an alkyl carboxylic acid represented by a structural formula, CnH2n+1COOH.Type: ApplicationFiled: March 14, 2007Publication date: September 27, 2007Inventors: Masahide Yamashita, Hiroshi Nakai, Jun Yura, Masato Iio, Shinya Tanaka
-
Patent number: 7270924Abstract: A photoreceptor including an electroconductive substrate, a photosensitive layer located overlying the substrate, and a protective layer overlying the photosensitive layer, wherein the photoreceptor has a property such that when the photoreceptor is charged so as to have a potential of ?700 V and then exposed to light with exposure of 0.4 ?J/cm2, the potential (PL) of a lighted portion of the photoreceptor decreases at a rate not greater than 700 V/sec during a time period of from a time 35 msec after the exposure to the transition time of the photoreceptor. An image forming apparatus and a process cartridge including the photoreceptor are also provided.Type: GrantFiled: March 19, 2004Date of Patent: September 18, 2007Assignee: Ricoh Company LimitedInventor: Hidetoshi Kami
-
Patent number: 7244485Abstract: A seamed flexible belt having a substrate and a seam having interlocking seam members, wherein the interlocking seam members are held together by an adhesive having polyamide and an optional electrically conductive filler, for use in electrostatographic, contact electrostatic, digital and other like printing machines.Type: GrantFiled: April 11, 2001Date of Patent: July 17, 2007Assignee: Xerox CorporationInventors: Ralph A. Mosher, T. Edwin Freeman, Theodore Lovallo, Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri, Gerald M. Fletcher, Antonio DeCrescentis, Ihor W. Tarnawskyj
-
Patent number: 7238456Abstract: Silicon-containing layers for electrophotographic photoreceptors which have high mechanical strength, improved electrophotographic characteristics and improved image deletion characteristics even under conditions of high temperature and high humidity are provided. Such silicon-containing layers include silicon-containing compounds, which may be cross-linked, and siloxane-containing antioxidants that can be selected from hindered phenol antioxidants, hindered amine antioxidants, thioether antioxidants and phosphite antioxidants. Electrophotographic photoreceptors and electrophotographic imaging apparatuses containing such silicon-containing layers are also provided.Type: GrantFiled: November 30, 2004Date of Patent: July 3, 2007Assignee: Xerox CorporationInventors: Timothy P Bender, Nan-Xing Hu, John F Graham, Yvan Gagnon, Jennifer A Coggan
-
Patent number: 7238458Abstract: A photo conductor has a protective surface layer whereon at least a carrier generation layer and a carrier transport layer are provided onto a conductive base. The protective surface layer includes a first protective surface layer using a hydrocarbon gas-based amorphous carbon with an ion implantation layer, and a second protective surface layer using a hydrocarbon gas-based amorphous carbon without an ion implantation layer.Type: GrantFiled: November 24, 2004Date of Patent: July 3, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yukimasa Kuramoto, Sotoshi Takimoto, Ryuichi Shingae
-
Patent number: 7229730Abstract: The invention provides a process for producing a negative-charging electrophotographic photosensitive member which can improve the adherence between a first layer and a second layer without lowering the effect of lessening image defects and realize a reduction in overall costs, a negative-charging electrophotographic photosensitive member produced by the process, and an electrophotographic apparatus. In the process for producing a negative-charging electrophotographic photosensitive member, a first layer is deposited on a substarte, at least the vertexes of protuberances are removed, the substrate with the first layer deposited theron is placed in a film forming furnace, the first layer surface is plasma-treated with a gas containing at least a Group 13 element in the periodic table and a dilution gas composed of at least one selected from hydrogen, argon and helium, and a layer formed of a non-single-crystal material is deposited as the second layer on the first layer.Type: GrantFiled: January 27, 2006Date of Patent: June 12, 2007Assignee: Canon Kabushiki KaishaInventors: Jun Ohira, Satoshi Kojima, Makoto Aoki, Kazuto Hosoi
-
Patent number: 7226711Abstract: An object of the present invention is to improve a phenomenon of the life-shortening of the endurance life due to scratch occurring when recesses of a fixed dimple shape are formed on the surface of the surface layer, in order to inhibit the chattering and folding back of a cleaning blade and the fracture of an edge, which occurs because friction between the surface layer of the surface of an electrophotographic photosensitive member and an abutting member is high; and particularly to improve the above described problems, from initial printing through printing on many sheets, which become particularly remarkable when using an electrophotographic photosensitive member with the use of a curable resin that is improved so as to have a high elastic deformation rate for the surface layer, in order to improve the strength of the surface layer, for the purpose of increasing the durability of an electrophotographic photosensitive member.Type: GrantFiled: September 28, 2005Date of Patent: June 5, 2007Assignee: Canon Kabushiki KaishaInventors: Shoji Amamiya, Koichi Nakata, Tatsuya Ikezue, Takahiro Mitsui, Akira Shimada, Hiroki Uematsu, Shuji Ishii, Akio Maruyama
-
Patent number: 7132208Abstract: A composition forms an overcoat layer for an organic photoreceptor by combining an organic silane compound, an acrylic polymer, polyvinyl butyral and a solvent. The organic photoreceptor has increased electrical and mechanical properties, leading to improved life characteristics. Also, unlike when a single material of either acrylic polymer or silsesquioxane is used in forming an overcoat layer, when the composition of the present invention is used, it is not necessary to coat a primer or an adhesive layer, thereby simplifying a coating process and reducing the cost required in forming additive layers.Type: GrantFiled: April 15, 2003Date of Patent: November 7, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Nam-jeong Lee, Kyung-yol Yon
-
Patent number: 7115346Abstract: A multi-layered electrophotographic positively charged organic photoconductor includes a conductive substrate, a charge transport layer formed on the conductive substrate, and a charge generating layer formed on the charge transport layer. A composition to form the charge transport layer includes at least one hole transport material, a binder resin and an organic solvent, and a composition to form the charge generating layer includes a charge generating material, a binder resin, an organic solvent and a hole transport material. An organic photoconductor has improved static electrical properties by controlling interfacial conditions of the charge transport layer and the charge generating layer. The charge generating layer may be readily coated on the charge transport layer. In addition, the organic photoconductor has excellent electric properties such as an improved sensitivity and a low discharge voltage.Type: GrantFiled: October 1, 2003Date of Patent: October 3, 2006Assignee: Samsung Electronics Co., LTDInventors: Saburo Yokota, Kyung-yol Yon, Hwan-koo Lee, Hae-ree Joo, Boem-jun Kim, Nam-jeong Lee
-
Patent number: 7060406Abstract: A light-receiving member comprising a conductive substrate, and formed superposingly thereon a photosensitive layer and a surface protective layer in order. The light-receiving member has a surface roughness Ra of from 15 nm to 100 nm. Also disclosed is an image-forming apparatus having such a light-receiving member, and an image-forming method of rendering visible an electrostatic pattern formed on the light-receiving member. The light-receiving member promises stable formation of images over a long period of time.Type: GrantFiled: May 2, 2003Date of Patent: June 13, 2006Assignee: Canon Kabushiki KaishaInventors: Kunimasa Kawamura, Shigenori Ueda, Toshiyuki Ehara, Junichiro Hashizume, Ryuji Okamura, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki
-
Patent number: 7060404Abstract: A photoreceptor including an electroconductive substrate; and a photosensitive layer located overlying the electroconductive substrate and comprising a charge generation material, a charge transport material and an inorganic filler, wherein the content of the inorganic filler at a surface side of the photosensitive layer is greater than that at a bottom side of the photosensitive layer near the electroconductive substrate, and wherein an outermost layer of the photoreceptor has a water vapor permeability not greater than 50 g·m?2·24 h?1.Type: GrantFiled: May 1, 2002Date of Patent: June 13, 2006Assignee: Ricoh Company, Ltd.Inventors: Hidetoshi Kami, Tatsuya Niimi, Akihiko Matsuyama, Eiji Kurimoto, Nozomu Tamoto
-
Patent number: 7033717Abstract: An electrophotographic photosensitive member production process is provided having the steps of placing a cylindrical substrate having a conductive surface in a first film-forming chamber, and decomposing a source gas with high-frequency power to deposit on the cylindrical substrate a first layer formed of a non-single-crystal material, taking out of the first film-forming chamber the cylindrical substrate with the first layer deposited thereon, and placing the cylindrical substrate with the first layer deposited thereon in a second film-forming chamber, and decomposing a source gas with a high-frequency power to deposit on the first layer a second layer having an upper-part blocking layer formed of a non-single-crystal material. Even where abnormal growth portions called spherical protuberances are present on the photosensitive member surface, they can be made not to appear on images, and image defects can vastly be remedied.Type: GrantFiled: July 31, 2003Date of Patent: April 25, 2006Assignee: Canon Kabushiki KaishaInventors: Satoshi Kojima, Toshiyuki Ehara, Hideaki Matsuoka, Junichiro Hashizume, Ryuji Okamura, Koji Hitsuishi, Hironori Ohwaki, Kazuto Hosoi
-
Patent number: 6998210Abstract: The present invention relates to an electrophotographic photosensitive member comprising a surface layer excellent in adhesiveness and abrasion resistance, having a hardness and a toughness, and not degrading the charge transport property. One aspect of the present invention provides an electrophotographic photosensitive member comprising a photosensitive layer on a conductive support, wherein a surface layer of the photosensitive member contains a crosslinked epoxy-modified resol type phenolic resin, and at least one of a charge transport material and a conductive fine particle.Type: GrantFiled: November 18, 2003Date of Patent: February 14, 2006Assignee: Canon Kabushiki KaishaInventors: Kimihiro Yoshimura, Yosuke Morikawa, Tatsuya Ikezue, Kouichi Nakata, Daisuke Tanaka
-
Patent number: 6949322Abstract: A composition forms an overcoat layer of an organophotoreceptor, the composition including polyaminoether and a solvent, and an organophotoreceptor employing the overcoat layer formed from the composition. The polyaminoether is represented by Formula 1: wherein n is an integer from 10 to 400.Type: GrantFiled: May 23, 2003Date of Patent: September 27, 2005Assignee: Samsung Electronics, Co., Ltd.Inventors: Nam-Jeong Lee, Saburo Yokota, Kyung-Yol Yon, Hwan-Koo Lee, Hae-ree Joo, Beom-Jun Kim
-
Patent number: 6846600Abstract: A process for producing an electrophotographic photosensitive member comprising the steps of depositing a non-single crystal material composed basically of silicon atoms, on a cylindrical substrate in a deposition chamber, thereafter once taking the substrate with film out of the deposition chamber, then returning it to the deposition chamber, and thereafter again depositing thereon a non-single-crystal material composed basically of carbon atoms. In another embodiment, the process comprises the steps of depositing on a cylindrical substrate a photoconductive layer formed of a non-single crystal material, subjecting to surface processing the deposited film having protrusions present at its surface, and depositing on the processed surface a surface protective layer formed of a non-single-crystal material. Also disclosed is the electrophotographic photosensitive member thus obtained, and an electrophotographic apparatus having that member.Type: GrantFiled: January 31, 2002Date of Patent: January 25, 2005Assignee: Canon Kabushiki KaishaInventors: Toshiyuki Ehara, Junichiro Hashizume, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki, Kunimasa Kawamura, Ryuji Okamura, Kazuto Hosoi
-
Patent number: 6835515Abstract: A composition is provided for coating a photoreceptor having a charge generating layer and a charge transport layer. The composition includes a hole transport material, a cross-linkable film forming binder having at least one functional group that is reactive with isocyanate, a blocked isocyanate cross-linking agent and a solvent having a boiling point equal to or below the deblocking temperature. The blocked isocyanate cross-linking agent is the reaction product of an isocyanate and a blocking agent, wherein the blocking agent has a boiling point temperature equal to or below a selected deblocking temperature to allow the isocyanate to form cross-links. The invention also provides an electrophotographic imaging member with an overcoat layer comprising a cross-linked film forming binder, an isocyanate compound, a hole transport material, and optionally a surface energy reducing agent. Processes for making the imaging members are also provided.Type: GrantFiled: February 21, 2003Date of Patent: December 28, 2004Assignee: Xerox CorporationInventors: Yuhua Tong, John F. Yanus, William W. Limburg, Timothy J. Fuller, Dale S. Renfer, Markus R. Silvestri
-
Patent number: 6830858Abstract: An electrophotographic photosensitive member having a photosensitive layer provided on an electro-conductive supporting substrate and a protection layer provided on the photosensitive layer. The protection layer includes a kind of finely divided metal oxide particle, an organic acid, and a binder resin. The binder resin is a thermo-curable resin. The organic acid is contained in an amount of 0.05 wt. % to 5 wt. % for the amount of the thermo-curable resin. The photosensitive member has a high durability capable of stable image productions for a long period of utilizable time, due to the protection layer.Type: GrantFiled: June 27, 2002Date of Patent: December 14, 2004Assignee: RICOH Company, Ltd.Inventors: Akihiro Sugino, Yasuo Suzuki
-
Publication number: 20040248024Abstract: Disclosed is an electrophotographic photoconductor including at least a photoconductive layer on an electroconductive substrate, which comprises at least a cross-linked surface layer formed by curing a tri- or more-functional radical polymerizable monomer without having a charge transporting structure and a mono-functional radical polymerizable compound having a charge transporting structure wherein the cross-linked surface layer has a surface roughness Rz of 1.3 &mgr;m or less.Type: ApplicationFiled: March 19, 2004Publication date: December 9, 2004Inventors: Tetsuro Suzuki, Hiroshi Tamura, Hiroshi Ikuno, Kazukiyo Nagai, Hongguo Li
-
Publication number: 20040224245Abstract: The present invention provides an electrophotographic photoreceptor and an electrophotographic member, which have superior mold releasing and sliding properties and are able to maintain these properties over long periods of time, the photoreceptor comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer, the electrophotographic member comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer and filling voids in the first layer, and further provides a process cartridge equipped with said electrophotographic photoreceptor or said electrophotographic member, and an image forming apparatus.Type: ApplicationFiled: June 2, 2004Publication date: November 11, 2004Applicant: FUJI XEROX CO., LTD.Inventors: Satoshi Shigezaki, Hiroe Okuyama, Takahiro Suzuki, Katsumi Nukada, Eiji Funabashi
-
Publication number: 20040202949Abstract: The present invention relates to an electrically conductive coating which is producible by hydrolytic condensation of a mixture including at least one hydrolysable silicon compound of general formula SiXnR(4−n) (I), wherein at least one of the R radicals is a mercapto-substituted alkyl or aryl group and is a compound of general formula Za Si Yb R(4−a−b) (II), wherein the Z radical is for example a quaternary ammonium salt, whereby the mixture to be hydrolytically condensed comprises at least one portion of an ether containing and alkyl group. The coating is particularly suitable for toner transfer drums and has high scratch resistance and good adhesion to the substrate.Type: ApplicationFiled: July 25, 2003Publication date: October 14, 2004Inventors: Gert Neumann, Sabine Dreihofer
-
Patent number: 6797445Abstract: A flexible electrophotographic imaging member comprising a supporting substrate, at least one imaging layer on one side of the supporting substrate, a charge blocking layer, an optional adhesive layer, a charge-generating layer, a charge transporting layer, a seam overcoat layer comprising a coating solution of a co-polyester resin and having a thickness of from about 2 to about 4 micrometers and having a width of from about 2 to about 10 millimeters and wherein said co-polyester resin is present in an amount of from about 2 to about 40 percent by weight based on the total weight of said overcoat layer, and a binder. The imaging member exhibits an excellent life cycle; excellent wear resistance, excellent electrical performance, and outstanding print quality.Type: GrantFiled: December 16, 2002Date of Patent: September 28, 2004Assignee: Xerox CorporationInventors: David J. Maty, John A. Bergfjord, Sr., Stephan V. Drappel