Patents Examined by Hoa Van Le
-
Patent number: 7326507Abstract: The present invention relates to a toner and process for preparing a toner for reproduction of a metallic, preferably golden or silvery, hue by a printing process, especially for electrophotography. A congeneric process and/or a congeneric toner is preserved with regard to its metallic hue and at the same time not to impair the essential properties of the toner for the printing process in which it is to be used. At least one metallic pigment is provided with a coating of silicate and subsequently with an organic layer and combining the thus obtained particle with toner material.Type: GrantFiled: January 26, 2005Date of Patent: February 5, 2008Assignee: Eastman Kodak CompanyInventors: Detlef Schulze-Hagenest, Udo Dräger, Dinesh Tyagi
-
Patent number: 7323283Abstract: A pulverized starting material is supplied quantitatively from a quantitative feeder 1 to a first mechanical pulverizer 2 where the material is pulverized moderately, the resulting moderately pulverized material is supplied quantitatively from a quantitative feeder 3 to a second mechanical pulverizer 4 where the material is finely pulverized, and the resulting finely pulverized material is introduced into a coarse-powder classifier 5 to classify coarse powder not smaller than a predetermined particle diameter. The finely pulverized material from which the coarse powder was removed by classification is further classified fine powder not larger than a predetermined size by a fine-powder classifier 7 to produce a classified product, while the separated classified coarse powder is introduced into a returning-powder feeder 6.Type: GrantFiled: March 2, 2005Date of Patent: January 29, 2008Assignee: Toyo Ink Mgf. Co., Ltd.Inventors: Nobuyuki Yoshimoto, Hirokazu Kambara, Tomomi Yamazaki
-
Patent number: 7320851Abstract: Toner particles comprise resin, wax and optionally colorants, and the wax is substantially excluded from the interior core of the toner particles. Processes for preparing such toner particles comprise providing an aqueous dispersion of resin particles and optionally colorants, mixing the aqueous dispersion in presence of a coagulant, aggregating to form particles, coalescing to form fused particles, and removing the fused particles from the aqueous dispersion. Wax dispersions can be added either after mixing or during aggregation, so that wax is excluded from the core of the toner particles.Type: GrantFiled: January 13, 2005Date of Patent: January 22, 2008Assignee: Xerox CorporationInventors: Ke Zhou, Enno Eric Agur, Wafa Faisul Bashir, Maria N. V. McDougall, Emily Louise Moore, Shigang Steven Qiu, Vladislav Skorokhod, Daryl W. Vanbesien, Edward Graham Zwartz, Joseph August Bartel, Patricia Ann Burns, T. Brian McAneney, Richard P. N. Veregin, Paul Joseph Gerroir
-
Patent number: 7318990Abstract: A toner includes toner particles which have a binder resin and a colorant. The toner has a weight average particle diameter of from 4 to 7 ?m and includes toner particles having a circle equivalent diameter of from 0.6 to 2.0 ?m in an amount not greater than 5% by quantity, toner particles having a particle diameter of from 3.17 to 4.00 ?m in an amount of from 10 to 40% by quantity, toner particles having a diameter of from 4.00 to 5.04 ?m in an amount of from 20 to 40% by quantity, and toner particles having a diameter not less than 12.7 ?m in an amount of from 0 to 1.0% by weight. The toner satisfies the following relationship: 1.04?D4/D1?1.30, wherein D4 represents the weight average particle diameter and D1 represents a number average particle diameter of the toner.Type: GrantFiled: December 13, 2004Date of Patent: January 15, 2008Assignee: Ricoh Company, Ltd.Inventors: Nobuyasu Makino, Masakazu Nakada, Tohru Suganuma, Fumitoshi Murakami
-
Patent number: 7316894Abstract: The present invention provides an aqueous regenerator for addition to an aqueous developer that contains an organic solvent, a dispersing agent and a weak base, and has a pH of between about 8 and less than about 13. The aqueous regenerator includes an organic solvent, dispersing agent, and an effective amount of a strong base such that the regenerator has a greater pH than the developer into which the regenerator is to be added.Type: GrantFiled: March 24, 2006Date of Patent: January 8, 2008Assignee: Eastman Kodak CompanyInventors: Gary Roger Miller, Kevin Wieland, Melanie Kelim
-
Patent number: 7316881Abstract: A method of producing a custom color particulate toner for use in a two-component developer by mixing two or more component color toners. The component color toners are each surface treated with a blend of two or more types of silica particles, which differ in the functional groups appended to them. The silica blend for each component color toner is chosen so that, when the component color toners are mixed together to form the custom color mixture, they will all tribocharge to the same charge-to-mass ratio when mixed with a carrier to form a developer.Type: GrantFiled: October 25, 2004Date of Patent: January 8, 2008Assignee: Eastman Kodak CompanyInventors: Donald S. Rimai, William K. Goebel, Matthew C. Ezenyilimba, Peter S. Alexandrovich, Dinesh Tyagi, James H. Anderson
-
Patent number: 7314694Abstract: An imaging member comprised of a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a metal alkyoxide, an amino siloxane, and at least one polymer binder containing epoxy groups.Type: GrantFiled: March 31, 2005Date of Patent: January 1, 2008Assignee: Xerox CorporationInventors: Yuhua Tong, Nancy L. Belknap, John F. Yanus, Jin Wu
-
Patent number: 7314692Abstract: A phenylazomethylene-cyclohexadienone derivative and an electrophotographic photoreceptor include a compound that is represented by the following formula: wherein R1 and R2 are independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 20 carbon atom(s), a substituted or unsubstituted alkoxy group having 1 to 20 carbon atom(s), a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, and a halogen; A is selected from the group consisting of nitro group, cyano group and sulfone group; l is a natural number of 0 to 4; m is a natural number of 0 to 4; and n is a natural number of 1 to 5, and the electrophotographic photoreceptor according to the present invention comprises the phenylazomethylene-cyclohexadienone derivative. An electrophotographic photoreceptor having an improved electrical characteristic and a desirable image quality is provided.Type: GrantFiled: October 15, 2004Date of Patent: January 1, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Beom-jun Kim, Saburo Yokota, Kyung-yol Yon, Hwan-koo Lee, Seung-ju Kim
-
Patent number: 7314705Abstract: A composition, method, and system for recording an image. The system includes an imaging material in which radiation energy is absorbed by an antenna material. The antenna material may be chosen from the group consisting of phthalocyanines and naphthalocyanines.Type: GrantFiled: June 2, 2006Date of Patent: January 1, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventor: Makarand P. Gore
-
Patent number: 7312009Abstract: The present invention relates to a non-magnetic mono-component toner comprising a toner mother particle, and a coating layer formed on the mother particle where the coating layer comprises fatty acid metal salt having average particle size of 0.05 to 3.0 ?m, a first organic particle having average particle size of 0.3 to 2.0 ?m, a second organic particle having average particle size of 0.05 to 0.25 ?m, and silica having average particle size of 0.006 to 0.04 ?m. The color toner has narrow charge distribution, high chargeability, a low environmental dependence, and excellent image quality, transfer efficiency, and long-term stability by significantly reducing the contamination of the charging elements.Type: GrantFiled: May 13, 2005Date of Patent: December 25, 2007Assignee: LG Chem, LtdInventors: Hyeung-Jin Lee, Joo-Yong Park, Chang-Soon Lee
-
Patent number: 7309565Abstract: Disclosed is an image forming process having the steps of exposing by an exposure device a photothermographic dry imaging material with a support having thereon an image forming layer containing photosensitive silver halide, a reducing agent for silver ions, a binder and a light-insensitive organic silver salt, and developing the photothermographic dry imaging material by a developing device, while the photothermographic dry imaging material is transported, wherein a surface having the image forming layer is brought into contact with sticky rollers during or before each of exposing and developing so as to make an amount of peel-off static electrification between the photothermographic dry imaging material and the sticky roller to be from ?5 to +5 kV.Type: GrantFiled: October 19, 2006Date of Patent: December 18, 2007Assignee: Konica Minolta Medical & Graphic, Inc.Inventor: Hiroyuki Yanagisawa
-
Patent number: 7309552Abstract: To provide a highly sensitive and highly durable electrophotographic photoconductor, electrophotography, photographic apparatus and process cartridge for the electrophotographic apparatus which is practical for a high-speed copying machine as well as for a laser printer. The electrophotographic photoconductor includes a photoconductive layer on a conductive support, in which the photoconductive layer contains an azo compound expressed by Formula (1) and wherein at least one of “Cp1” and “Cp2” contains a coupler residue selected from Formula (2), Formula (3) and Formula (4).Type: GrantFiled: September 17, 2004Date of Patent: December 18, 2007Assignee: Ricoh Company, Ltd.Inventors: Yuko Arizumi, Masayuki Shoshi
-
Patent number: 7303865Abstract: A photothermographic material including, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer, wherein the photothermographic material contains a metal phthalocyanine dye represented by formula (I): wherein, M represents a metal atom; R1, R2, R3, R4, R5, R6, R7, and R8 each independently represent a hydrogen atom or a substituent, with at least one of them being a substituent; X1, X2, X3, and X4 each independently represent a hydrogen atom or a substituent; and at least one of R1, R2, R3, R4, R5, R6, R7, R8, X1, X2, X3, and X4 is an oil-soluble group. The invention provides a photothermographic material which exhibits preferable image tone and excellent image storability.Type: GrantFiled: October 19, 2005Date of Patent: December 4, 2007Assignee: FUJIFILM CorporationInventor: Yasuhiro Yoshioka
-
Patent number: 7303864Abstract: The invention provides a black and white photothermographic material comprising an image forming layer containing on at least one side of a support at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder, wherein: the non-photosensitive organic silver salt comprises at least one compound selected from a silver salt of an azole compound or a silver salt of a mercapto compound; and the photothermographic material further comprises, a compound that can be one-electron-oxidized to provide a one-electron oxidation product which releases one or more electrons, and an adsorptive redox compound having a group adsorbable to the silver halide and a reducing group in the molecule. The invention provides a black and white photothermographic material having high image quality and an excellent storability, and an image forming method.Type: GrantFiled: March 28, 2005Date of Patent: December 4, 2007Assignee: FUJIFILM CorporationInventor: Tomoyuki Ohzeki
-
Patent number: 7300731Abstract: The present invention relates to new a charge transport layer that includes first charge transport material which is spatially doped with a second charge transport material. The charge transport layer may either be a hole or electron transport layer and is useful in organic electronic devices.Type: GrantFiled: August 10, 2004Date of Patent: November 27, 2007Assignee: E.I. du Pont de Nemours and CompanyInventor: Ying Wang
-
Patent number: 7300734Abstract: A toner composition comprising a binder, colorant, and a charge control surface additive mixture comprising a mixture of a first titanium dioxide possessing a first conductivity and a second titanium dioxide possessing a second conductivity and which second conductivity is dissimilar than the first conductivity; wherein the mixture of the first titanium dioxide and the second titanium dioxide is selected in a ratio sufficient to impart a selected triboelectric charging characteristic to the toner composition.Type: GrantFiled: December 3, 2004Date of Patent: November 27, 2007Assignee: Xerox CorporationInventors: Maria N. V. McDougall, Richard P. N. Veregin
-
Patent number: 7297459Abstract: A process for manufacturing a toner having improved relative humidity sensitivity is described. The process comprises forming polyester toner particles by emulsion/aggratation, fluidizing the toner particles with a stream of inert gas while spraying the toner particles with a solution containing an additive affecting relative humidity sensitivity, and wherein the additive contacts a surface of the toner particles and the additive remains on the surface of the toner particles.Type: GrantFiled: November 1, 2004Date of Patent: November 20, 2007Assignee: Xerox CorporationInventors: Milan Maric, Alan E. J. Toth, Marko D. Saban
-
Patent number: 7294441Abstract: A method of producing a composite image on a final image receptor from image data in a single pass electrophotographic system is provided. The method includes steps for applying liquid transfer assist material comprising charged particles of transfer assist material to at least a portion of an element of the electrophotographic system, along with charged toner particles, in order to provide a composite image layer on a final image receptor in a single pass of a photoreceptive element through transfer of the composite image layer from another element in the system.Type: GrantFiled: June 30, 2004Date of Patent: November 13, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: James A. Baker, Truman F. Kellie, Gay Herman, Brian P. Teschendorf, A. Kristine Fordahl
-
Patent number: 7286781Abstract: A toner for developing a latent image includes, at least, a binder resin, a releasing agent, a coloring agent and a fluidizing agent. A melting point Tw of the releasing agent is higher than or equals to a softening temperature Ts of the developer measured by a capillary rheometer of a constant shear stress type. The melting point Tw of the releasing agent is lower than or equals to a melting temperature Tm of the developer measured by ½ method. Using the above described toner, it becomes possible to print a full color image at a high speed without causing an offset phenomena or sheet jam.Type: GrantFiled: July 25, 2005Date of Patent: October 23, 2007Assignee: Oki Data CorporationInventor: Kenji Koido
-
Patent number: 7282312Abstract: The present invention relates to a toner having a double- or triple-layered structure. The present invention is effective in that pigments and charge control agents are located most properly for the realization of high-resolution toners through addition and polymerization of hydrophilic monomers or polymers with the toners; the manufacture of high-resolution toners becomes very easy irrespective to the kind and amount of a wax used for polymerized toners by forming thin layers by using polar grafting agents; and long-term preservation is assured as well as the affect by moisture is minimized.Type: GrantFiled: April 8, 2004Date of Patent: October 16, 2007Assignee: LG Chem, Ltd.Inventors: Woo-cheul Jung, Woong-ki Lee, Tae-hee Yoon