Patents by Inventor Mark C. Petropoulos
Mark C. Petropoulos 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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Patent number: 11318733Abstract: According to aspects of the embodiments, there is provided a method of determining the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is determined from diagnostic images that are printed and analyzed using the existing Image Based Controls (IBC). An analysis of the density of solids, halftones, and background as a function of the fountain solution control parameter is performed to decide on the appropriate level of fountain solution. A latitude window of control parameters is then derived for which the digital offset lithography printing system in operation minimizes the undesirable effects of too much or too little fountain solution.Type: GrantFiled: June 30, 2020Date of Patent: May 3, 2022Assignee: Xerox CorporationInventors: Mark J. Hirsch, David C. Craig, Mark C. Petropoulos, Eliud Robles Flores
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Patent number: 11305572Abstract: According to aspects of the embodiments, there is provided a method of determining the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is determined by examining optical density of some halftone or solid patch versus laser current level. The apparatus and method uses a variable current signal to dither or perturb the laser imaging system to irradiate a fountain solution layer to create patches at different laser current levels. An aptly programmed controller then process optical density measurements to indirectly estimate fountain solution level.Type: GrantFiled: June 30, 2020Date of Patent: April 19, 2022Assignee: Xerox CorporationInventors: David C. Craig, Mark J. Hirsch, Mark C. Petropoulos, Eliud Robles Flores
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Patent number: 11298964Abstract: Provided herein is an imaging blanket for variable data lithography comprising (i) a substrate and (ii) a thermally-conductive composition disposed on the substrate comprising a silicone elastomer and a thermally-conductive filler selected from metal oxides, wherein the thermally-conductive composition has a thermal conductivity ranging from about 0.6 W/m2 to about 1.6 W/m2. Further provided herein a method of making the imaging blanket, as well as a printing system comprising the imaging blanket, wherein the imaging blanket has improved thermal conductivity.Type: GrantFiled: March 28, 2019Date of Patent: April 12, 2022Assignee: XEROX CORPORATIONInventors: Varun Sambhy, Joseph Sheflin, Peter Knausdorf, Mark C. Petropoulos, Jack T. LeStrange, Santokh S. Badesha
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Patent number: 11230135Abstract: The present disclosure is directed to a multilayer imaging blanket for a variable data lithography printing system, including: a multilayer base having a lower contacting surface configured to wrap around or to be mounted on a cylinder core of the variable data lithography printing system; and a platinum catalyzed fluorosilicone surface layer opposite the lower contacting surface; wherein the multilayer base is a sulfur-free carcass including: a top layer including a sulfur-free rubber substrate such as an ethylene propylene diene monomer (EPDM) rubber substrate, a bottom layer including the lower contacting surface; and a compressible layer disposed between the top layer and the bottom layer, the compressible layer being attached to a surface of the top layer opposite the platinum catalyzed fluorosilicone surface layer and a surface of the bottom layer opposite the lower contacting surface, optionally the top layer further comprises a reinforcing fabric layer, the reinforcing fabric layer attached to a surfaType: GrantFiled: May 7, 2019Date of Patent: January 25, 2022Assignee: XEROX CORPORATIONInventors: Varun Sambhy, Lin Ma, Kyle B. Tallman, Santokh S. Badesha, Michael S. Roetker, Mark C. Petropoulos, Jack T. LeStrange, Joseph C. Sheflin, Peter J. Knausdorf, Jorge A. Alvarez
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Publication number: 20210402756Abstract: According to aspects of the embodiments, there is provided a method of determining the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is determined from diagnostic images that are printed and analyzed using the existing Image Based Controls (IBC). An analysis of the density of solids, halftones, and background as a function of the fountain solution control parameter is performed to decide on the appropriate level of fountain solution. A latitude window of control parameters is then derived for which the digital offset lithography printing system in operation minimizes the undesirable effects of too much or too little fountain solution.Type: ApplicationFiled: June 30, 2020Publication date: December 30, 2021Inventors: Mark J. HIRSCH, David C. CRAIG, Mark C. PETROPOULOS, Eliud ROBLES FLORES
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Publication number: 20210402821Abstract: According to aspects of the embodiments, there is provided a method of determining the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is determined by examining optical density of some halftone or solid patch versus laser current level. The apparatus and method uses a variable current signal to dither or perturb the laser imaging system to irradiate a fountain solution layer to create patches at different laser current levels. An aptly programmed controller then process optical density measurements to indirectly estimate fountain solution level.Type: ApplicationFiled: June 30, 2020Publication date: December 30, 2021Inventors: David C. CRAIG, Mark J. HIRSCH, Mark C. PETROPOULOS, Eliud ROBLES FLORES
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Publication number: 20200353770Abstract: The present disclosure is directed to a multilayer imaging blanket for a variable data lithography printing system, including: a multilayer base having a lower contacting surface configured to wrap around or to be mounted on a cylinder core of the variable data lithography printing system; and a platinum catalyzed fluorosilicone surface layer opposite the lower contacting surface; wherein the multilayer base is a sulfur-free carcass including: a top layer including a sulfur-free rubber substrate such as an ethylene propylene diene monomer (EPDM) rubber substrate, a bottom layer including the lower contacting surface; and a compressible layer disposed between the top layer and the bottom layer, the compressible layer being attached to a surface of the top layer opposite the platinum catalyzed fluorosilicone surface layer and a surface of the bottom layer opposite the lower contacting surface, optionally the top layer further comprises a reinforcing fabric layer, the reinforcing fabric layer attached to a surfaType: ApplicationFiled: May 7, 2019Publication date: November 12, 2020Applicant: XEROX CORPORATIONInventors: Varun Sambhy, Lin Ma, Kyle B. Tallman, Santokh S. Badesha, Michael S. Roetker, Mark C. Petropoulos, Jack T. LeStrange, Joseph C. Sheflin, Peter J. Knausdorf, Jorge A. Alvarez
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Publication number: 20200307293Abstract: Provided herein is an imaging blanket for variable data lithography comprising (i) a substrate and (ii) a thermally-conductive composition disposed on the substrate comprising a silicone elastomer and a thermally-conductive filler selected from metal oxides, wherein the thermally-conductive composition has a thermal conductivity ranging from about 0.6 W/m2 to about 1.6 W/m2. Further provided herein a method of making the imaging blanket, as well as a printing system comprising the imaging blanket, wherein the imaging blanket has improved thermal conductivity.Type: ApplicationFiled: March 28, 2019Publication date: October 1, 2020Applicant: XEROX CORPORATIONInventors: Varun Sambhy, Joseph Sheflin, Peter Knausdorf, Mark C. Petropoulos, Jack T. LeStrange, Santokh S. Badesha
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Patent number: 7380976Abstract: A device comprising a flow channel having an inlet for introducing a flow of a first material, an outlet for exiting a flow of a second material; a plunger disposed and slidably movable coaxially within the flow channel; a first cooling device disposed adjacent to and substantially surrounding the flow channel comprising a housing having an internal sealable chamber for containing a first cooling fluid, an inlet having a first seal, and an outlet having a second seal, wherein the first cooling fluid is sealable within the sealable chamber; a second cooling device disposed adjacent to and substantially surrounding the first cooling device comprising a housing having an internal channel for a flow of a second cooling fluid, an inlet in fluid communication with the internal channel, an outlet in fluid communication with the channel, and a device for controlling the flow of second cooling fluid.Type: GrantFiled: July 18, 2005Date of Patent: June 3, 2008Assignee: Xerox CorporationInventors: Debra A. Mattison, Mark C. Petropoulos, Mark S. Thomas, Sean X. Pan
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Patent number: 6953060Abstract: An apparatus comprising: (a) a substrate including a level intermediate region disposed between a first end region and a second end region; (b) a first external member disposed circumferentially around the first end region in a continuous manner and protruding above the level intermediate region, thereby resulting in a deposition region including the surface of the first external member covering the first end region, an optional exposed first end region portion, and the intermediate region; and (c) a dip coated layer over the entire deposition region, wherein the portion of the dip coated layer over the first external member and the optional exposed first end region portion is formed prior to the portion of the dip coated layer over the intermediate layer.Type: GrantFiled: December 19, 2001Date of Patent: October 11, 2005Assignee: Xerox CorporationInventors: Sean X. Pan, Mark S. Thomas, Mark C. Petropoulos
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Patent number: 6869651Abstract: An apparatus including: (a) a substrate including a deposition region and an optional uncoated region, wherein the deposition region includes a level intermediate region disposed between a first end region and a second end region, wherein the first end region includes a first raised surface portion extending above the level intermediate region and extending circumferentially around the first end region in a continuous manner; and (b) a dip coated layer over the entire deposition region.Type: GrantFiled: December 19, 2001Date of Patent: March 22, 2005Assignee: Xerox CorporationInventors: Sean X. Pan, Mark C. Petropoulos, Linnette Perales Rivera, Jeremy B. Pinsly, Zhilei Wang, Mark S. Thomas
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Patent number: 6652910Abstract: An apparatus, to be used when an open end of a hollow substrate contacts a coating solution to define a solution free interior portion of the substrate, for controlling the level of the coating solution relative to the substrate interior, the apparatus including: a gas container capable of changing in volume; a channel connecting the gas container to the solution free interior portion of the substrate to allow gas flow in either direction between the gas container and the solution free interior portion; and pressure means for exerting a changeable, continuous pressure on the gas container that automatically exerts an increasingly greater pressure on the gas container as the gas container expands in volume and that automatically exerts a decreasingly lesser pressure on the gas container as the gas container decreases in volume.Type: GrantFiled: February 8, 2002Date of Patent: November 25, 2003Assignee: Xerox CorporationInventors: Sean X. Pan, Mark C. Petropoulos
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Publication number: 20030152697Abstract: An apparatus, to be used when an open end of a hollow substrate contacts a coating solution to define a solution free interior portion of the substrate, for controlling the level of the coating solution relative to the substrate interior, the apparatus including: a gas container capable of changing in volume; a channel connecting the gas container to the solution free interior portion of the substrate to allow gas flow in either direction between the gas container and the solution free interior portion; and pressure means for exerting a changeable, continuous pressure on the gas container that automatically exerts an increasingly greater pressure on the gas container as the gas container expands in volume and that automatically exerts a decreasingly lesser pressure on the gas container as the gas container decreases inType: ApplicationFiled: February 8, 2002Publication date: August 14, 2003Applicant: Xerox CorporationInventors: Sean X. Pan, Mark C. Petropoulos
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Publication number: 20030113469Abstract: An apparatus including:Type: ApplicationFiled: December 19, 2001Publication date: June 19, 2003Applicant: Xerox CorporationInventors: Sean X. Pan, Mark C. Petropoulos, Linnette Perales Rivera, Jeremy B. Pinsly, Zhilei Wang, Mark S. Thomas
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Publication number: 20030113470Abstract: An apparatus comprising:Type: ApplicationFiled: December 19, 2001Publication date: June 19, 2003Applicant: Xerox CorporationInventors: Sean X. Pan, Mark S. Thomas, Mark C. Petropoulos
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Publication number: 20030063971Abstract: A coating method for a hollow substrate including: (a) forming a seamed extended substrate unit composed of a substrate extension device and the substrate, and employing a chuck assembly to internally grip the substrate; (b) dip coating the extended substrate unit while the chuck assembly internally grips the substrate to deposit a layer first on the substrate extension device and then on the substrate; and (c) separating, subsequent to the dip coating the extended substrate unit, the substrate extension device from the substrate.Type: ApplicationFiled: November 6, 2002Publication date: April 3, 2003Applicant: Xerox CorporationInventors: Christopher A. Bonino, Mark C. Petropoulos, Michael J. Duggan, L, John Potter, Stanley J. Pietrzykowski, Shaun Selha, Mark S. Thomas, Eugene A. Swain
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Publication number: 20030012888Abstract: A coating method for a hollow substrate including: (a) forming a seamed extended substrate unit composed of a substrate extension device and the substrate, and employing a chuck assembly to internally grip the substrate; (b) dip coating the extended substrate unit while the chuck assembly internally grips the substrate to deposit a layer first on the substrate extension device and then on the substrate; and (c) separating, subsequent to the dip coating the extended substrate unit, the substrate extension device from the substrate.Type: ApplicationFiled: July 11, 2001Publication date: January 16, 2003Applicant: Xerox CorporationInventors: Christopher A. Bonino, Mark C. Petropoulos, Michael J. Duggan, L. John Potter, Stanley J. Pietrzykowski, Shaun Selha, Mark S. Thomas, Eugene A. Swain
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Patent number: 6503571Abstract: A coating method for a hollow substrate including: (a) forming a seamed extended substrate unit composed of a substrate extension device and the substrate, and employing a chuck assembly to internally grip the substrate; (b) dip coating the extended substrate unit while the chuck assembly internally grips the substrate to deposit a layer first on the substrate extension device and then on the substrate; and (c) separating, subsequent to the dip coating the extended substrate unit, the substrate extension device from the substrate.Type: GrantFiled: July 11, 2001Date of Patent: January 7, 2003Assignee: Xerox CorporationInventors: Christopher A. Bonino, Mark C. Petropoulos, Michael J. Duggan, L. John Potter, Stanley J. Pietrzykowski, Jr., Shaun Selha, Mark S. Thomas, Eugene A. Swain
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Patent number: 6195443Abstract: A manufacturing system including: (a) a vessel for holding a liquid; (b) a first member and a second member, each having a flat surface, wherein the flat surface of the first member faces and is spaced from the flat surface of the second member, thereby defining a gap region between the two flat surfaces, wherein a section of the first member is transparent through the thickness of the first member; (c) a liquid delivery system connected to the vessel and the gap region which delivers the liquid to the gap region and the liquid flows in the gap region in view of the transparent section of the first member; (d) a camera positioned to view through the transparent section of the first member; (e) image processing means coupled to the camera for determining the homogeneity of the liquid in the gap region; and (f) liquid dispensing equipment connected to the liquid delivery system.Type: GrantFiled: May 15, 1998Date of Patent: February 27, 2001Assignee: Xerox CorporationInventors: John M. Hammond, Jian Cai, Kent J. Evans, John G. Matta, Robert F. Dunham, Mario Errico, Julie A. Cady, Mark C. Petropoulos, Stanley J. Pietrzykowski, Jr., Mark S. Thomas
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Patent number: 5829760Abstract: There is disclosed a chuck assembly for internally holding a hollow substrate having an open end including: (a) a body including an end section having a width narrower than that of the inner width of the substrate to permit insertion of the end section through the substrate open end into the substrate interior; and (b) a compressible spring coiled around a portion of the end section, wherein prior to compression the spring has an outer width larger than that of the inner width of the substrate, wherein upon insertion of the end section of the body into the substrate the spring is compressed by contact with the substrate inner surface resulting in the chuck assembly holding the substrate by the force generated against the substrate inner surface by the spring in opposition to the compression.Type: GrantFiled: March 31, 1997Date of Patent: November 3, 1998Assignee: Xerox CorporationInventors: Alan B. Mistrater, Stanley J. Pietrzykowski, Jr., Alfred O. Klein, Loren E. Hendrix, Mark C. Petropoulos