Polycyclo Ring System Having The Hetero Ring As One Of The Cyclo Systems Patents (Class 430/78)
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Patent number: 11264572Abstract: A method for producing an organic non-fullerene electron transport compound includes mixing naphthalene-1,4,5,8-tetracarboxylic dianhydride and an amine compound in dimethylformamide. The method also includes heating the mixture to a temperature greater than or equal to 70° and less than or equal to 160° C. for an amount of time greater than or equal to 1 hour and less than or equal to 24 hours. The method further includes isolating an organic non-fullerene electron transport compound reaction product.Type: GrantFiled: November 23, 2020Date of Patent: March 1, 2022Assignee: CubicPV Inc.Inventors: Michael David Irwin, Minh Tu Nguyen, Kamil Mielczarek
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Patent number: 11169453Abstract: The present disclosure provides an electrophotographic photosensitive member having a surface layer in which an occurrence of the image deletion is suppressed; a process cartridge equipped with the electrophotographic photosensitive member; and an electrophotographic apparatus provided with the process cartridge. An electrophotographic photosensitive member has a surface layer that includes a copolymerized product of a composition including a metal oxide particle having a polymerizable functional group on a surface thereof and a polymerizable compound having a particular structure.Type: GrantFiled: June 8, 2020Date of Patent: November 9, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Eileen Takeuchi, Koichi Nakata, Shubun Kujirai, Haruki Mori
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Patent number: 11036151Abstract: An electrophotographic photoreceptor, including a photosensitive layer formed on an electroconductive substrate. The photosensitive layer includes a charge-generating material and an electron-transporting material, and the electron-transporting material includes first and second electron-transporting materials. A difference in lowest unoccupied molecular orbital (LUMO) energy between the first electron-transporting material and the charge-generating material is in a range from 1.0 to 1.5 eV, and a difference in LUMO energy between the second electron-transporting material and the charge-generating material is in a range from 0.6 to 0.9 eV. A ratio of mass of the second electron-transporting material to a total of mass of the first electron-transporting material and the mass of the second electron-transporting material is in a range from 3 to 40%.Type: GrantFiled: April 1, 2020Date of Patent: June 15, 2021Assignee: FUJI ELECTRIC CO., LTD.Inventors: Seizo Kitagawa, Kazuya Saito, Shinjiro Suzuki, Toshiki Takeuchi
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Patent number: 10899940Abstract: Disclosed herein as a printing method and system which includes providing a substrate and depositing an interlayer composition including a polymer selected from the group of epoxy resins, polyvinyl phenols and poly(melamine-co-formaldehyde) and an interlayer composition solvent on the substrate. The interlayer composition is cured to form cured interlayer. A conductive metal ink composition is deposited on the cured interlayer and the conductive metal ink composition is cured to form a solid metal trace on the cured interlayer.Type: GrantFiled: January 25, 2017Date of Patent: January 26, 2021Assignee: Xerox CorporationInventors: Naveen Chopra, Chad Smithson, Kurt Halfyard, Gail Song, Michelle Chretien
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Patent number: 10359714Abstract: An electrophotographic photosensitive member includes a conductive substrate and a single-layer photosensitive layer. The photosensitive layer contains at least a charge generating material and a compound represented by general formula (1). In general formula (1), R1 represents an aryl group having a carbon number of at least 6 and no greater than 22 and optionally having an alkyl group having a carbon number of at least 1 and no greater than 10, an alkyl group having a carbon number of at least 3 and no greater than 20, an aralkyl group having a carbon number of at least 7 and no greater than 20, a cycloalkyl group having a carbon number of at least 3 and no greater than 20, or an alkoxy group having a carbon number of at least 1 and no greater than 6. Chemical groups R2 each represent a halogen atom.Type: GrantFiled: October 23, 2018Date of Patent: July 23, 2019Assignee: KYOCERA Document Solutions Inc.Inventor: Hideki Okada
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Patent number: 10197928Abstract: The present invention relates to an electrophotographic photoreceptor which is a positive charging type electrophotographic photoreceptor comprising a conductive support and a photosensitive layer on the conductive support, wherein the photosensitive layer contains at least a charge generating material, a hole transport material, an electron transport material, and a binder resin in the same layer, and a residual potential VL1 at a point at which an exposure amount for forming a latent image is 0.3 ?J/cm2 is equal to or lower than 130 V when an initial surface potential V0 is set to +700 V, exposure with monochromatic light of 780 nm is performed and measurement is performed by a dynamic method.Type: GrantFiled: May 10, 2017Date of Patent: February 5, 2019Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Hiroe Fuchigami, Mitsuo Wada
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Patent number: 10185237Abstract: An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and the amount of bisphenol residues represented by formula (3) after the polyarylate resin is hydrolyzed, is 0.2% to 1%, in terms of intensity ratio, based on the total amount of bisphenol residues represented by formula (2) and formula (3) after the polyarylate resin is hydrolyzed, the bisphenol residues being detected with a gas chromatograph employing a hydrogen flame ionization detector (FID).Type: GrantFiled: January 11, 2016Date of Patent: January 22, 2019Assignee: Mitsubishi Chemical CorporationInventors: Akiteru Fujii, Rui Zhao, Yuka Nagao, Atsushi Yoshizawa, Yuuta Kumano
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Patent number: 10095135Abstract: Provided is an excellent phthalocyanine crystal having high sensitivity and little fluctuation in sensitivity for a humidity change in a use environment and applicable to the martial for solar battery, electronic paper, electrophotographic photoreceptor, etc. Namely, phthalocyanine crystal obtained by bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form. Also, provided is an electrophotographic photoreceptor that not only exhibits high sensitivity but also has little fluctuation in sensitivity for a humidity change in a use environment. Further, provided is an electrophotographic photoreceptor cartridge and an image-forming device, both of which can produce a stable quality images for a humidity change in a use environment by using the electrophotographic photoreceptor.Type: GrantFiled: August 7, 2017Date of Patent: October 9, 2018Assignee: Mitsubishi Chemical CorporationInventors: Mitsuo Wada, Kazutaka Ida, Teruyuki Mitsumori, Hiroaki Takamura, Tadashi Mizushima
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Patent number: 10067437Abstract: An electrostatic charge image developer includes: toner particles; silica particles treated with a silicone oil, which are externally added to the toner particles; and a carrier, wherein a volume average particle diameter of the carrier is equal to or greater than 20 ?m and smaller than 30 ?m, and a quantity ratio of an elemental silicon derived from a silicone oil and an elemental silicon derived from silica which are present on the surface of the carrier (silicone oil-derived elemental silicon/silica-derived elemental silicon) is in a range of 0.05 to 0.2.Type: GrantFiled: November 1, 2016Date of Patent: September 4, 2018Assignee: FUJI XEROX CO., LTD.Inventors: Masashi Ikeda, Emi Takahashi, Yuka Ishihara, Manabu Furuki, Makoto Kamisaki, Teppei Yawada
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Patent number: 9971257Abstract: An electrophotographic photosensitive member including a surface layer containing a charge generating material and a polyester resin is provided. The polyester resin contains a structure having a 12- or higher-membered cycloalkylene group.Type: GrantFiled: February 14, 2017Date of Patent: May 15, 2018Assignee: Canon Kabushiki KaishaInventors: Kazumichi Sugiyama, Kazunori Noguchi, Harunobu Ogaki
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Patent number: 9696641Abstract: An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material and a hole transport material represented by general formula (1) shown below in a single layer. Titanyl phthalocyanine contained as the charge generating material exhibits a main peak at a Bragg angle 2?±0.2°=27.2° in a CuK? characteristic X-ray diffraction spectrum and satisfies either (B) or (C), shown below, in a differential scanning calorimetry spectrum. (B) A peak is not present in a range from 50° C. to 400° C., other than a peak resulting from vaporization of adsorbed water. (C) A peak is not present in a range from 50° C. to 270° C., other than a peak resulting from vaporization of adsorbed water, and a peak is present in a range from 270° C. to 400° C.Type: GrantFiled: January 29, 2016Date of Patent: July 4, 2017Assignee: KYOCERA Document Solutions Inc.Inventors: Yuko Iwashita, Kazutaka Sugimoto, Takafumi Matsumoto
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Patent number: 9417541Abstract: A toner including: toner particles each including a toner base particle and an external additive attached thereon, where the toner base particle includes a binder resin and a colorant, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.10 ?m or more but less than 0.50 ?m, a standard deviation of the lengths of the long sides of the protrusions is 0.2 or less, a coverage rate of the protrusions on the surface of the toner base particle is 10% to 90%, and the external additive includes fine inorganic particles whose surfaces have been treated with an amino group-containing silane coupling agent.Type: GrantFiled: April 25, 2012Date of Patent: August 16, 2016Assignee: Ricoh Company, Ltd.Inventors: Yoshimichi Ishikawa, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Kazuoki Fuwa, Tomohiro Fukao, Tomoharu Miki
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Patent number: 9400438Abstract: The present invention relates to an electrophotographic photoreceptor comprising a conductive support and at least a photosensitive layer provided thereon, wherein the electrophotographic photoreceptor comprises an outermost layer which contains a specific charge transport substance and a specific compound.Type: GrantFiled: August 6, 2014Date of Patent: July 26, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Akiteru Fujii, Yuka Nagao
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Patent number: 9268244Abstract: An electrostatic image developing toner including: toner base particles each including a binder resin and a colorant; and an external additive, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.1 ?m or more but less than 0.5 ?m, a standard deviation of the lengths of the long sides of the protrusions is 0.2 or less, a coverage rate of the protrusions on the surface of each toner base particle is 10% to 90%, and the external additive includes an external additive (A) which is fine inorganic particles each containing silicone oil.Type: GrantFiled: April 25, 2012Date of Patent: February 23, 2016Assignee: Ricoh Company, Ltd.Inventors: Tomohiro Fukao, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Kazuoki Fuwa, Tomoharu Miki
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Patent number: 9229342Abstract: A surface layer of an electrophotographic photosensitive member contains (?) a particular siloxane-modified resin, (?) a particular compound, and a charge transporting substance. (?) is at least one compound selected from the group consisting of 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, and sulfolane.Type: GrantFiled: November 12, 2013Date of Patent: January 5, 2016Assignee: Canon Kabushiki KaishaInventors: Takashi Anezaki, Kazuhisa Shida, Masashi Nishi, Hirofumi Kumoi, Daisuke Tanaka, Kazumichi Sugiyama
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Patent number: 9141008Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer, in which the undercoat layer contains a polymerized product of a compound represented by the formula (1) or a polymerized product of a composition containing a compound represented by the formula (1).Type: GrantFiled: April 23, 2014Date of Patent: September 22, 2015Assignee: Canon Kabushiki KaishaInventors: Kunihiko Sekido, Nobuhiro Nakamura, Atsushi Okuda, Michiyo Sekiya, Yota Ito
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Publication number: 20150147691Abstract: A photosensitive layer of an electrophotographic photosensitive member contains a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2?±0.2° of 7.0°, 16.6°, 20.8°, and 26.9° in X-ray diffraction with CuK? radiation.Type: ApplicationFiled: November 24, 2014Publication date: May 28, 2015Inventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
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Patent number: 8906586Abstract: A coating fluid for photosensitive-layer formation having high productivity and stability and a process thereof are provided. Also provided are a high-performance electrophotographic photoreceptor and an image-forming apparatus which are capable of forming high-quality images even in various use environments and are less apt to cause image defects such as black spots or color spots. The objects are accomplished with a process for producing a coating fluid which is for forming a photosensitive layer of an electrophotographic photoreceptor and comprises a charge-generating material and a binder resin, wherein a dispersing medium having an average particle diameter in the range of from 1.0 ?m to 350 ?m is used as a dispersing medium for dispersing the charge-generating material in the coating fluid for photosensitive-layer formation. The coating fluid for photosensitive-layer formation produced by this process is preferable as a photosensitive layer of an electrophotographic photoreceptor.Type: GrantFiled: May 18, 2007Date of Patent: December 9, 2014Assignee: Mitsubishi Chemical CorporationInventors: Teruyuki Mitsumori, Kozo Ishio, Hiroe Fuchigami
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Publication number: 20140356772Abstract: A photoconductor that includes, for example, a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, and a charge transport layer, and where the charge transport layer contains a mixture of a charge transport component and a bio-based polycarbonate.Type: ApplicationFiled: June 3, 2013Publication date: December 4, 2014Applicant: Xerox CorporationInventor: Jin Wu
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Patent number: 8889324Abstract: An image bearing member including an electroconductive substrate, and a photosensitive layer provided overlying the electroconductive substrate, the photosensitive layer containing at least one charge transport materials selected from the group consisting of a naphthalene tetracarboxylic acid diimide-isoindol derivative represented by the following chemical structure 1, a naphthalimide-isoindol derivative represented by the following chemical structure 2, and a triphenyl amine-isoindol derivative represented by the following chemical structure 3, where R1 and R2 independently represent a hydrogen atom, a substituted or non-substituted alkyl group, an alkoxy group, a substituted or non-substituted aromatic hydrocarbon group, a halogen atom, and a nitro group, k represents an integer of 1 to 4, and l represents an integer of from 1 to 5 and R3 represents a substituted or non-substituted alkyl group, a substituted or non-substituted cycloalkyl group, and a substituted or non-substituted aromatic hydrocarboType: GrantFiled: February 8, 2011Date of Patent: November 18, 2014Assignee: Ricoh Company, Ltd.Inventors: Ryota Arai, Tomoyuki Shimada
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Patent number: 8846282Abstract: Provided is an excellent phthalocyanine crystal having high sensitivity and little fluctuation in sensitivity for a humidity change in a use environment and applicable to the martial for solar battery, electronic paper, electrophotographic photoreceptor, etc. Namely, phthalocyanine crystal obtained by bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form. Also, provided is an electrophotographic photoreceptor that not only exhibits high sensitivity but also has little fluctuation in sensitivity for a humidity change in a use environment. Further, provided is an electrophotographic photoreceptor cartridge and an image-forming device, both of which can produce a stable quality images for a humidity change in a use environment by using the electrophotographic photoreceptor.Type: GrantFiled: April 6, 2012Date of Patent: September 30, 2014Assignee: Mitsubishi Chemical CorporationInventors: Mitsuo Wada, Kazutaka Ida, Teruyuki Mitsumori, Hiroaki Takamura, Tadashi Mizushima
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Publication number: 20140242507Abstract: A positively chargeable single-layer electrophotographic photosensitive member includes a single-layer photosensitive layer. The single-layer photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The electron transport material contains two or more compounds selected from the group consisting of compounds represented by the chemical formulas (1) to (4) below.Type: ApplicationFiled: February 26, 2014Publication date: August 28, 2014Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventors: Tomofumi SHIMIZU, Hiroki TSURUMI, Yohei YAMAMOTO, Eiichi MIYAMOTO
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Publication number: 20140212804Abstract: A solution of a gallium phthalocyanine contains a compound of formula (1) and a gallium phthalocyanine of formula (2), H2N—CH2—R1—CH2—NH2??(1) wherein R1 represents a single bond, or a substituted or unsubstituted alkylene group having 1 to 10 main-chain carbon atoms, a substituent of the substituted alkylene group is an alkyl group having 1 to 3 carbon atoms, an alkyl group having 1 to 3 carbon atoms and being substituted with an amino group, or a hydroxy group, one of the carbon atoms in the main chain of the alkylene group may be replaced with an oxygen atom, a sulfur atom, or a bivalent group represented by the formula —NR2—, and R2 represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or an alkyl group having 1 to 3 carbon atoms and being substituted with an amino group, and wherein X1 represents a chlorine atom or hydroxy group.Type: ApplicationFiled: January 29, 2014Publication date: July 31, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
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Publication number: 20140212801Abstract: A photosensitive layer or a charge generation layer of an electrophotographic photosensitive member contains a gallium phthalocyanine and a particular diamine compound such as 1,2-diaminoethane or 1,3-diaminopropane. The content of the particular diamine compound in the photosensitive layer or the charge generation layer is from 10 ppm to 1,000 ppm (mass ratio) based on the gallium phthalocyanine.Type: ApplicationFiled: January 29, 2014Publication date: July 31, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
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Publication number: 20140065530Abstract: A photosensitive layer of an electrophotographic photosensitive member includes a phthalocyanine pigment and a specific dicyanoethylene compound. Alternatively, the photosensitive layer and/or an undercoat layer of the electrophotographic photosensitive member include a specific dicyanoethylene compound, and the photosensitive layer includes the phthalocyanine pigment.Type: ApplicationFiled: August 29, 2013Publication date: March 6, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Tsutomu Nishida, Junpei Kuno, Kaname Watariguchi, Masataka Kawahara, Masato Tanaka
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Patent number: 8563204Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a hydroxygallium phthalocyanine, a hydroxyaluminum phthalocyanine, a polymeric binder, and a silanol.Type: GrantFiled: June 29, 2010Date of Patent: October 22, 2013Assignee: Xerox CorporationInventor: Jin Wu
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Patent number: 8530124Abstract: A hydroxygallium phthalocyanine composite pigment, which is a composite pigment wherein an azo compound expressed by the following general formula (a) is conjugated to a hydroxygallium phthalocyanine pigment, wherein the hydroxygallium phthalocyanine composite pigment has diffraction peaks at least at 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1°, and 28.3° on an X-ray diffraction spectrum with Bragg angle of 2?±0.2°, using Cu—K? X-rays: A(H)n??General Formula (a) where A is a residue of an azo compound; H is a hydrogen atom; the residue A is bonded to one or more hydrogen atoms, where the number of the hydrogen atoms is expressed with n, via one or more heteroatoms which are selected from the group consisting of N and O, and form part of the residue A; and n is an integer of 1 to 9.Type: GrantFiled: December 10, 2010Date of Patent: September 10, 2013Assignee: Ricoh Company, Ltd.Inventors: Hiromi Sakaguchi, Masafumi Ohta, Yoshiki Yanagawa
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Publication number: 20130149639Abstract: An intermediate transfer member that includes a mixture of a polyamideimide, an ammonium alkylphosphate, an optional polysiloxane, and an optional conductive filler.Type: ApplicationFiled: February 6, 2013Publication date: June 13, 2013Applicant: Xerox CorporationInventor: Xerox Corporation
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Patent number: 8441003Abstract: A phosphorescent polymer compound including structural units that are derived from a compound represented by Formula (1): wherein R1 to R8 and L are as defined herein.Type: GrantFiled: June 24, 2008Date of Patent: May 14, 2013Assignee: Showa Denko K.K.Inventor: Yoshiaki Takahashi
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Patent number: 8349457Abstract: Perfluoroisopropyl-substituted perfluorophtalocyanines, including zinc (II), copper (II) and oxo-vanadium (IV) complexes of 29H,31H,1,4,8,11,15,18,22,25-octakis-fluoro-2,3,9,10,16,17,23,24-octakis-perfluoro(isopropyl)phthalocyanine (F64Pc), may be sublimed under high vacuum conditions. The compounds/molecules produce advantageous thin films (20-100 nm) on glass substrates by physical vapor deposition. Many potential applications of the disclosed compounds/molecules are disclosed, e.g., as semiconductor materials. In situ electrical conduction and optical transmission measurements during the deposition process reveal the formation of conducting pathways and potential microscopic intermolecular electronic couplings.Type: GrantFiled: December 1, 2009Date of Patent: January 8, 2013Assignee: New Jersey Institute of TechnologyInventors: Sergiu M. Gorun, Olga Tsaryova, Lukasz Lapok
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Patent number: 8304153Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer overlying the conductive substrate. The photosensitive layer comprises a phthalimide isoindole derivative having a specific chemical formula.Type: GrantFiled: September 7, 2010Date of Patent: November 6, 2012Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Ryota Arai
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Patent number: 8278016Abstract: An electrophotographic photoconductor including an electroconductive support and a photoconductive layer provided thereon, wherein the photoconductive layer includes a charge generating material, an electron transporting material and a hole transporting material, the electron transporting material being a diphenoquinone compound represented by formula (1) described herein, the hole transporting material being a compound represented by formula (2) described herein.Type: GrantFiled: June 9, 2009Date of Patent: October 2, 2012Assignee: Ricoh Company, Ltd.Inventors: Keisuke Shimoyama, Eiji Kurimoto, Takaaki Ikegami, Kohsuke Yamamoto, Tadayoshi Uchida, Takumi Shinohara, Hajime Suzuki
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Patent number: 8236469Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. In particular, the present embodiments pertain to an improved imaging member comprising a single layer in which the single layer further comprises a combination of one or more high mobility hole (charge) transport molecules and electron transport molecules.Type: GrantFiled: February 10, 2010Date of Patent: August 7, 2012Assignee: Xerox CorporationInventors: Nancy L. Belknap, Katlyn Mallory, Helen Cherniack, Edward F. Grabowski
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Patent number: 8192905Abstract: An electrophotographic photoconductor contains a photosensitive layer and a conductive substrate, wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer containing a charge generating material, an electron transporting material expressed by the General Formula (1) and a hole transporting material expressed by the General Formula (2):Type: GrantFiled: April 18, 2007Date of Patent: June 5, 2012Assignee: Ricoh Company, Ltd.Inventors: Keisuke Shimoyama, Eiji Kurimoto, Shinichi Kawamura
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Patent number: 8138300Abstract: There is disclosed an intermediate transfer member that includes a layer of a poly(imide-carbonate) copolymer having dispersed therein conductive particles. The layer can be a surface layer.Type: GrantFiled: September 21, 2010Date of Patent: March 20, 2012Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, Jin Wu
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Patent number: 8064795Abstract: An electrophotographic image forming apparatus, including a photoreceptor, a charger charging the surface of the photoreceptor, an irradiator irradiating the surface of the photoreceptor with imagewise light to form an electrostatic latent image thereon, an image developer developing the electrostatic latent image with a developer including a toner to form a toner image on the surface of the photoreceptor, and a transferer transferring the toner image onto a transfer material, wherein the photoreceptor includes an electroconductive substrate, and a photosensitive layer overlying the electroconductive substrate and including a charge generation material and a specific charge transport material.Type: GrantFiled: May 10, 2010Date of Patent: November 22, 2011Assignee: Ricoh Company, Ltd.Inventors: Keisuke Shimoyama, Eiji Kurimoto, Michitaka Sasaki, Shin-ichi Kawamura
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Publication number: 20110268472Abstract: To provide an electrophotographic photosensitive member that can reproduce good images with less positive ghost and also has a good photosensitivity, the electrophotographic photosensitive member is incorporated in its photosensitive layer with a copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (2), or a copolymer having a repeating structural unit represented by the formula (1) and a repeating structural unit represented by the formula (3).Type: ApplicationFiled: January 29, 2010Publication date: November 3, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kunihiko Sekido, Hideaki Nagasaka, Michiyo Sekiya, Shinji Takagi, Akihiro Maruyama
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Patent number: 8039625Abstract: Briefly described, embodiments of this disclosure include coronene charge-transport materials, methods of forming coronene charge-transport materials, and methods of using the coronene charge-transport materials.Type: GrantFiled: February 28, 2006Date of Patent: October 18, 2011Assignee: Georgia Tech Research CorporationInventors: Seth Marder, Zesheng An, Jungsheng Yu, Bernard Kippelen
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Patent number: 8029955Abstract: Provide is an electrophotographic photoreceptor exhibiting excellent evenness of halftone images together with fine line reproduction, and an image forming method thereof, as to a photoreceptor in which an oxytitanium phthalocyanine pigment having a maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction. Also disclosed is an electrophotographic photoreceptor possessing a body having cylindrical conductive support provided thereon photosensitive layer containing oxytitanium phthalocyanine pigment having maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction, and flanges jointed at both ends of the body, wherein at least one of flanges is fitted with driving shaft having drive hole having at least 3 sides, and a ratio B/A of cross-sectional area B of engaging part of rotation shaft to rotate the electrophotographic photoreceptor with respect to cross-sectional area A of the drive hole is 0.890-0.998.Type: GrantFiled: January 29, 2009Date of Patent: October 4, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Eiichi Sakai, Yoshihiko Eto, Kimiyuki Itou, Akihiko Itami, Takeo Oshiba
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Patent number: 8007972Abstract: An object of the present invention is to provide an image forming apparatus containing an electrophotographic photoconductor, a charging unit, an exposing unit, a developing unit, a transfer unit and a cleaning unit, wherein the electrophotographic photoconductor contains a support and at least a photosensitive layer disposed on the support, wherein the photosensitive layer contains a charge generating material and a compound expressed by the following Structural Formula (1), and wherein, in the Structural Formula (1), “R1” and “R2” may be identical to each other or different, and represent any one of hydrogen atom, alkyl group which may be substituted, cycloalkyl group which may be substituted and aralkyl group which may be substituted.Type: GrantFiled: September 15, 2006Date of Patent: August 30, 2011Assignee: Ricoh Company, Ltd.Inventors: Eiji Kurimoto, Keisuke Shimoyama, Michio Kimura, Shinichi Kawamura, Takeshi Takada, Yasuyuki Yamashita, Naohiro Toda, Hideo Nakamori
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Patent number: 7998650Abstract: Disclosed herein is a method for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of mixing 30˜100 wt % sulfuric acid and an oxytitanium phthalocyanine crude in a mixing ratio between 100:1 and 1:1, homogeneously grinding the mixture in a wet grinder filled with zirconia or glass beads as grinding media at ?20° C.˜60° C. for 0.1˜24 hours, and removing the grinding media from the ground mixture using a solvent. According to the method, oxytitanium phthalocyanine usable as a high-quality charge generating material can be prepared without the use of expensive and difficult-to-handle reactants, such as trifluoroacetic acid and pentafluoropropionic acid. Further disclosed is an oxytitanium phthalocyanine charge generating material prepared by the method.Type: GrantFiled: October 7, 2004Date of Patent: August 16, 2011Assignee: PHTALOS Co., Ltd.Inventors: Ki Suck Jung, Jong Ho Kwon, Seong Soo Park, Jun Sik Shin, Woo Ho Son, Seung Wook Song
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Publication number: 20110159420Abstract: To provide a gallium phthalocyanine compound, which is expressed by the following general formula (I) where R1 to R32 are each independently a hydrogen atom, an alkoxy group, an alkylthio group, an alkyl group, a halogen atom, a nitro group, or an aryl group.Type: ApplicationFiled: December 27, 2010Publication date: June 30, 2011Inventors: Hiromi Sakaguchi, Masafumi Ohta, Yoshiki Yanagawa
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Patent number: 7947417Abstract: A process for preparing a high sensitivity titanyl phthalocyanine (TiOPc) pigment includes dissolving a Type I TiOPc in a suitable solvent, precipitating an intermediate TiOPc pigment by quenching the solution comprising the dissolved Type I TiOPc in a solvent system comprising an alcohol and alkylene chloride such as, for example, methylene chloride, and treating the intermediate TiOPc pigment with monochlorobenzene. The resultant TiOPc pigment, which is designated as a Type V TiOPc, is suitable for use as a charge generating material in a photoreceptor of an imaging device.Type: GrantFiled: November 18, 2004Date of Patent: May 24, 2011Assignee: Xerox CorporationInventors: Jin Wu, Liang-Bih Lin, Ah-Mee Hor, Roger E. Gaynor, Justin F. Galloway
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Patent number: 7919220Abstract: An electrophotographic photoreceptor, comprising: an electroconductive substrate; and a photosensitive layer located overlying the electroconductive substrate, wherein the photosensitive layer is a single-layered layer comprising a charge generation material and an electron transport material having the following specific formula (1): wherein the charge generation materials is a titanylphthalocyanine having a specific CuK? 1.542 ? X-ray diffraction spectrum.Type: GrantFiled: October 30, 2007Date of Patent: April 5, 2011Assignee: Ricoh Company, Ltd.Inventors: Keisuke Shimoyama, Eiji Kurimoto, Shinichi Kawamura
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Publication number: 20110045390Abstract: An electrophotographic photosensitive member having a support and a photosensitive layer formed on the support, wherein the photosensitive layer contains a boron complex which is a product of the reaction of a compound having a phenolic hydroxyl group and a carbonyl group with a boron halide. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.Type: ApplicationFiled: August 6, 2010Publication date: February 24, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Masato Tanaka
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Patent number: 7871747Abstract: To provide an electrophotographic photoconductor that has a layer containing a compound represented by the following general formula (1), and an image forming apparatus using the electrophotographic photoconductor. where R1 and R2 independently represent any one of a hydrogen atom, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group, and R3, R4, R5, R6, R7, R8, R9 and R10 independently represent any one of a hydrogen atom, halogen atom, cyano group, nitro group, amino group, hydroxyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group.Type: GrantFiled: September 12, 2006Date of Patent: January 18, 2011Assignee: Ricoh Company, Ltd.Inventors: Keisuke Shimoyama, Eiji Kurimoto, Takeshi Orito, Tatsuya Niimi, Shinichi Kawamura, Yoshiki Yanagawa, Michitaka Sasaki
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Patent number: 7869749Abstract: A semiconductive rubber roller comprising a toner-transporting portion whose outermost layer is formed essentially of vulcanized rubber containing 0.1 to 30 parts by mass of a phthalocyanine compound for 100 parts by mass of the vulcanized rubber. An electric resistance value of the semiconductive rubber roller which is measured at a temperature of 23° C. and a humidity of 55% is in a range of 103 to 109?, when a voltage of 100V is applied thereto.Type: GrantFiled: October 26, 2007Date of Patent: January 11, 2011Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Yoshihisa Mizumoto, Noriaki Hitomi, Hirotoshi Murakami, Yajun Zhang
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Patent number: 7838191Abstract: The present invention provides a monolayer type electrophotographic photoconductor which can effectively suppress the generation of an exposure memory and exhibits high sensitivity and an image forming apparatus using the monolayer type electrophotographic photoconductor. In an electrophotographic photoconductor which has a monolayer type photoconductive layer including at least a charge generating agent, a hole transfer agent, an electron transfer agent and a binding resin on a substrate, the charge generating agent contains oxo-titanyl phthalocyanine crystal, the electron transfer agent has a reduction potential thereof set to a value which falls within a range from ?0.97 to ?0.83 V, and the reflection absorbance (A/?) of the photoconductive layer with respect to light having a wavelength of 700 nm, a film thickness (d/m) of the photoconductive layer, and the concentration (C/weight %) of the oxo-titanyl phthalocyanine crystal of the photoconductive layer (100 weight %) satisfy a following formula (1).Type: GrantFiled: March 12, 2007Date of Patent: November 23, 2010Assignee: Kyocera Mita CorporationInventors: Daisuke Kuboshima, Kazunari Hamasaki, Yuko Iwashita
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Patent number: 7824936Abstract: Disclosed herein is a method of preparing a low resistance metal line, is a method of manufacturing a dispersion type AC inorganic electroluminescent device and a dispersion type AC inorganic electroluminescent device manufactured thereby, in which a light-emitting layer and a dielectric layer between a lower electrode and an upper electrode are simultaneously formed through a single process using spin coating, thereby simplifying the overall manufacturing process and decreasing the manufacturing cost, and furthermore, the contact interface between the light-emitting layer and the dielectric layer is increased, therefore increasing the brightness of the device.Type: GrantFiled: January 18, 2008Date of Patent: November 2, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Shang Hyeun Park, Tae Won Jeong, Se Gi Yu, Min Jong Bae
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Patent number: 7812154Abstract: Disclosed herein are a method and an apparatus for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of homogeneously mixing an oxytitanium phthalocyanine crude with an organic solvent while microwave energy having a frequency of 0.1˜100 GHz and a power of 10˜3,000 W and ultrasonic wave energy having a frequency of 1˜1,000 kHz and a power of 10˜5,000 W are applied thereto, and reacting the mixture at 30˜100° C. for 0.5˜5 hours. The apparatus comprises: a magnetron 1 capable of generating a frequency of 0.Type: GrantFiled: October 7, 2004Date of Patent: October 12, 2010Assignee: Phthalos Co., LtdInventors: Jong Ho Kwon, Ki Suck Jung, Woo Ho Son, Seong Soo Park, Jin Phil Ko, Hyun Suk Jung