Patents by Inventor Peter S. Alexandrovich
Peter S. Alexandrovich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230107991Abstract: Foil images are formed simultaneously with color toner images on a receiver material. One or more color toner latent images are formed on the receiver material using dry color toners. Each dry color toner has a (a) polymeric resin, a (b) pigment colorant, and a (c) wax that has a melting temperature defined as Tcolor. A foiling latent image is formed using a dry foiling toner that has a (a?) polymeric resin and a (c?) wax that has a melting temperature defined as Tfoiling. The foiling latent image is in an area that is different from the color image areas and Tfoiling is less than Tcolor by at least 15° C. All toners are simultaneously fixed in a fuser oil-free fixing operation. A printing foil can be brought into intimate contact with the fused foiling toner at a foiling temperature (FT) that is greater than Tfoiling but less than Tcolor.Type: ApplicationFiled: September 20, 2022Publication date: April 6, 2023Inventors: Peter S. Alexandrovich, Diego A. Diaz, David F. Cahill
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Patent number: 10241457Abstract: A toner coverage sensing system is provided for sensing toner particles printed onto a surface of a process element using an electrophotographic printing system. The printed toner particles include porous color toner particles. An infrared radiation source directs infrared radiation onto the printed toner particles on the surface of the process element A diffused radiation detector senses infrared radiation scattered from the printed toner particles, wherein the diffused radiation detector is oriented such that that the sensed infrared radiation does not include specular reflections from the surface of the process element. A data processing system determines a sensed toner coverage for the porous color toner particles on the surface of the process element responsive to the sensed scattered infrared radiation.Type: GrantFiled: January 19, 2018Date of Patent: March 26, 2019Assignee: EASTMAN KODAK COMPANYInventors: Peter S. Alexandrovich, Rodney R. Bucks, Tomas G. P. McHugh, Jerry A. Pickering
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Patent number: 8507166Abstract: A toner composition includes resin core particles having outer surfaces, and surface treatment, wherein the surface treatment includes at least first metal oxide particles having a surface area equivalent average particle diameter of greater than 25 nm and a surface energy of less than 28 erg/cm2, as determined by methanol wettability midpoint at 22° C., tacked to the outer surfaces of the resin core particles, at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area, and wherein the toner composition comprises less than 0.013 g non-tacked surface treatment per square meter of resin core particles outer surface. A developer for developing electrostatic images includes magnetic carrier particles and toner as described above, wherein the developer comprises less than 0.Type: GrantFiled: June 30, 2011Date of Patent: August 13, 2013Assignee: Eastman Kodak CompanyInventors: Kevin D. Lofftus, Peter S. Alexandrovich
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Patent number: 8335464Abstract: A cleaning brush for use in an electrostatographic imaging apparatus, including a plurality of individual electrically conductive fibers secured to a brush core and having fiber tips relatively remote from the brush core, wherein the cleaning brush includes an electrically conductive plane at a surface of the brush core, or between a surface of the brush core and the electrically conductive fibers, effective for inducing an electrical potential to the conductive fibers when an electrical potential is applied to the electrically conductive plane, and at least one of a relatively non-conductive layer electrically insulating the conductive plane from the conductive fibers, or electrically insulating coatings on tips of the electrically conductive fibers remote from the brush core. The insulative, or non-conductive, layer between the fibers and the conductive plane of the brush prevent excessive current draw.Type: GrantFiled: June 30, 2010Date of Patent: December 18, 2012Assignee: Eastman Kodak CompanyInventors: Jerry A. Pickering, Kurt E. Jones, Patrick M. Lambert, Peter S. Alexandrovich
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Publication number: 20120308924Abstract: A process for adhering surface treatment to toner resin core particles includes: providing resin core particles including a binder polymer having a Tg and having outer surfaces; providing surface treatment including at least first metal oxide particles having an average particle size of greater than 25 nm and a surface energy of less than or equal to 28 erg/cm2, as determined by methanol wettability midpoint at 22° C., and tacking the at least first metal oxide particles to the resin core particles by mixing at a temperature greater than the Tg of the binder polymer. Preferably, the surface treatment is tacked to the outer surfaces of the resin core particles at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area.Type: ApplicationFiled: June 30, 2011Publication date: December 6, 2012Inventors: Kevin D. Lofftus, Peter S. Alexandrovich
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Publication number: 20120308923Abstract: A toner composition includes resin core particles having outer surfaces, and surface treatment, wherein the surface treatment includes at least first metal oxide particles having a surface area equivalent average particle diameter of greater than 25 nm and a surface energy of less than 28 erg/cm2, as determined by methanol wettability midpoint at 22° C., tacked to the outer surfaces of the resin core particles, at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area, and wherein the toner composition comprises less than 0.013 g non-tacked surface treatment per square meter of resin core particles outer surface. A developer for developing electrostatic images includes magnetic carrier particles and toner as described above, wherein the developer comprises less than 0.Type: ApplicationFiled: June 30, 2011Publication date: December 6, 2012Inventors: Kevin D. Lofftus, Peter S. Alexandrovich
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Patent number: 8164790Abstract: Methods of improving image quality by reducing grain and texture in a printed image are provided. According to one embodiment, a method of reducing grain and texture in an image includes the steps of providing a light color toner and a dark color toner, providing an aperiodic micrononuniformity map, using the aperiodic micrononuniformity map to determine an acceptable domain that includes a plurality of combinations of the light color toner and the dark color toner, and forming an image by selecting one combination of the light color toner and the dark color toner from the plurality of combinations of the light color toner and the dark color toner.Type: GrantFiled: March 5, 2009Date of Patent: April 24, 2012Assignee: Eastman Kodak CompanyInventors: Yee S. Ng, Mamie Kam Ng, legal representative, Hwai-Tzuu Tai, Peter S. Alexandrovich, Chung-Hui Kuo
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Publication number: 20120003022Abstract: A cleaning brush for use in an electrostatographic imaging apparatus, including a plurality of individual electrically conductive fibers secured to a brush core and having fiber tips relatively remote from the brush core, wherein the cleaning brush includes an electrically conductive plane at a surface of the brush core, or between a surface of the brush core and the electrically conductive fibers, effective for inducing an electrical potential to the conductive fibers when an electrical potential is applied to the electrically conductive plane, and at least one of a relatively non-conductive layer electrically insulating the conductive plane from the conductive fibers, or electrically insulating coatings on tips of the electrically conductive fibers remote from the brush core. The insulative, or non-conductive, layer between the fibers and the conductive plane of the brush prevent excessive current draw.Type: ApplicationFiled: June 30, 2010Publication date: January 5, 2012Inventors: Jerry A. Pickering, Kurt E. Jones, Patrick M. Lambert, Peter S. Alexandrovich
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Patent number: 8012915Abstract: The present invention is a release oil of the general formulae: wherein (Z) is an amine. The solvent extracted portion of the release oil has a ratio of A:B less than 1:5. Less than 10% of the molecular weight distribution of the release oil is less than m/z 1000. The release oil preferably has a viscosity of between 200 and 500 centistokes.Type: GrantFiled: October 19, 2007Date of Patent: September 6, 2011Assignee: Eastman Kodak CompanyInventors: Wayne T. Ferrar, Jerry A. Pickering, David F. Cahill, Peter S. Alexandrovich, Andrew J. Hoteling
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Patent number: 7914963Abstract: The present invention is a toner that includes a polymeric binder and a polyethylene wax or ester wax. A dispersing agent of poly(ethylene vinyl acetate) is included in the toner that dispersed the wax and reduces the amount of free wax particles.Type: GrantFiled: December 12, 2007Date of Patent: March 29, 2011Assignee: Eastman Kodak CompanyInventors: Robert D. Fields, Charles T. Havens, Peter S. Alexandrovich, Dinesh Tyagi
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Publication number: 20100224090Abstract: Methods of improving image quality by reducing grain and texture in a printed image are provided. According to one embodiment, a method of reducing grain and texture in an image includes the steps of providing a light color toner and a dark color toner, providing an aperiodic micrononuniformity map, using the aperiodic micrononuniformity map to determine an acceptable domain that includes a plurality of combinations of the light color toner and the dark color toner, and forming an image by selecting one combination of the light color toner and the dark color toner from the plurality of combinations of the light color toner and the dark color toner.Type: ApplicationFiled: March 5, 2009Publication date: September 9, 2010Inventors: Yee S. Ng, Hwai-Tzuu Tai, Peter S. Alexandrovich, Chung-Hui Kuo
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Patent number: 7601473Abstract: The invention relates to a developer for developing electrostatic images. The developer includes magnetic carrier particles at a loading of from 60 to 99 weight percent of the developer. Toner particles are at a loading of 1 to 40 weight percent of the developer. The toner particles include a resin core particle having an outer surface and 0.05 to 5 weight percent a first metal oxide powder is substantially fixed to the outer surface. The toner particles further include 0.05 to 2 weight percent of a second metal oxide powder that is substantially free to transfer between outer surface of the toner particles and an outer surface of the magnetic carrier surface.Type: GrantFiled: June 23, 2006Date of Patent: October 13, 2009Assignee: Eastman Kodak CompanyInventors: Kevin D. Lofftus, Satyanarayan Srinivsan, David D. Putnam, Peter S. Alexandrovich
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Publication number: 20090155704Abstract: The present invention is a toner that includes a polymeric binder and a polyethylene wax or ester wax. A dispersing agent of poly(ethylene vinyl acetate) is included in the toner that dispersed the wax and reduces the amount of free wax particles.Type: ApplicationFiled: December 12, 2007Publication date: June 18, 2009Inventors: Robert D. Fields, Charles T. Havens, Peter S. Alexandrovich, Dinesh Tyagi
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Publication number: 20090105100Abstract: The present invention is a release oil of the general formulae: wherein (Z) is an amine. The solvent extracted portion of the release oil has a ratio of A:B less than 1:5. Less than 10% of the molecular weight distribution of the release oil is less than m/z 1000. The release oil preferably has a viscosity of between 200 and 500 centistokes.Type: ApplicationFiled: October 19, 2007Publication date: April 23, 2009Inventors: Wayne T. Ferrar, Jerry A. Pickering, David F. Cahill, Peter S. Alexandrovich, Andrew J. Hoteling
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Patent number: 7343120Abstract: Controlling the charge on toner in a development station of an electrographic reproduction apparatus, wherein data relative to latent image charge carrying member voltage and image density control patches are sensed and development potential to achieve an aim density is calculated therefrom. A delta from an optimum development potential range is calculated, and in response to the determined delta, an amount of liquid charge control agent, from a supply of suitable liquid charge control agent, necessary to be added to the developer material in the development station to bring the toner to substantially a charge level that will enable a desired optimum developer potential is calculated. The calculated amount of liquid charge control agent is then injected directly into the development station.Type: GrantFiled: December 21, 2005Date of Patent: March 11, 2008Assignee: Eastman Kodak CompanyInventors: Scott T. Slattery, Peter S. Alexandrovich, Rodney R. Bucks, Timothy J. Young, Brandon H. Brown
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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
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Publication number: 20070298343Abstract: The invention relates to a developer for developing electrostatic images. The developer includes magnetic carrier particles at a loading of from 60 to 99 weight percent of the developer. Toner particles are at a loading of 1 to 40 weight percent of the developer. The toner particles include a resin core particle having an outer surface and 0.05 to 5 weight percent a first metal oxide powder is substantially fixed to the outer surface. The toner particles further include 0.05 to 2 weight percent of a second metal oxide powder that is substantially free to transfer between outer surface of the toner particles and an outer surface of the magnetic carrier surface.Type: ApplicationFiled: June 23, 2006Publication date: December 27, 2007Inventors: Kevin D. Lofftus, Satyanarayan Srinivsan, David D. Putnam, Peter S. Alexandrovich
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Patent number: 6723481Abstract: Methods for development of an electrostatic image are disclosed that utilize developer compositions with hard magnetic carrier compositions which can provide improved development efficiencies and reduced amounts of image carrier pick-up. The methods utilize hard magnetic carrier particles that are modified to have specific levels of resistivity, such as, for example, of from about 1×105 ohm-cm to about 1×1010 ohm-cm, and a carrier charge-to-mass of greater than about 1.0 &mgr;C/g, which carriers can provide greater development speeds without unacceptable levels of image carrier pick-up. In embodiments, the hard magnetic materials are doped, i.e., bulk substituted, with multi-valent metals to adjust resistivity, while in other embodiments, the hard magnetic materials are coated with at least one multi-valent metal oxide.Type: GrantFiled: May 11, 2001Date of Patent: April 20, 2004Assignees: Heidelberger Druckmaschinen AG, NexPress Solutions LLCInventors: Patrick Lambert, Eric C. Stelter, William K. Goebel, Peter S. Alexandrovich
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Patent number: 6716560Abstract: A particulate toner composition comprises a dry blend of a low viscosity polymeric particulate toner component having a first selected melt viscosity and a first selected melt elasticity, and a high viscosity polymeric particulate toner component having a second selected melt viscosity and a second selected melt elasticity. The first and second melt viscosities and first and second melt elasticities are each selected so as to produce a lower variation in measured G60 gloss values as a function of fusing temperature for fused images formed from the dry blend toner composition than the corresponding variation in measured G60 gloss values for fused images formed from the low viscosity polymeric toner component of the composition.Type: GrantFiled: February 1, 2002Date of Patent: April 6, 2004Assignee: NexPress Solutions LLCInventor: Peter S. Alexandrovich
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Publication number: 20030148205Abstract: A particulate toner composition comprises a dry blend of a low viscosity polymeric particulate toner component having a first selected melt viscosity and a first selected melt elasticity, and a high viscosity polymeric particulate toner component having a second selected melt viscosity and a second selected melt elasticity. The first and second melt viscosities and first and second melt elasticities are each selected so as to produce a lower variation in measured G60 gloss values as a function of fusing temperature for fused images formed from the dry blend toner composition than the corresponding variation in measured G60 gloss values for fused images formed from the low viscosity polymeric toner component of the composition.Type: ApplicationFiled: February 1, 2002Publication date: August 7, 2003Applicant: NexPress Solutions LLCInventor: Peter S. Alexandrovich