Patents by Inventor Chad David Freitag
Chad David Freitag 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: 10328691Abstract: A print head has a jet stack, a jet stack heating and temperature measuring element thermally connected to the jet stack, the jet stack heating and temperature measuring element including: a first, etched copper layer having heat spreading characteristics and including a resistive heat source electrically connected in series to a voltage source and a switch; an electrically insulative on a back side of the first copper layer; and a second, etched copper layer on a side of the electrically insulative layer opposite the first copper layer, the second copper layer having a temperature sensing element to sense a temperature of the print head without a thermistor, the temperature sensing element connected in series with a voltage source and a transistor. A print head may use a thermistor but the heat spreading layer eliminates the need for a heat sink to attach to the print head.Type: GrantFiled: February 15, 2018Date of Patent: June 25, 2019Assignee: XEROX CORPORATIONInventors: Curtis Douglass Keller, Gautam Dhar, David Lylell Knierim, Chad David Freitag, Jonathan Robert Brick, Douglas Dean Darling, Nasser Alavizadeh, Bradford Stewart, William Bruce Weaver
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Patent number: 10306775Abstract: A method of forming an electrical interconnect includes etching a lattice pattern into a contact pad on a circuit substrate as a first connection point, at least partially filling the lattice pattern with a conductive epoxy, contacting the conductive epoxy with a second connection point, and curing the epoxy.Type: GrantFiled: January 19, 2017Date of Patent: May 28, 2019Assignee: XEROX CORPORATIONInventors: Chad David Freitag, Tygh James Newton, Chad Johan Slenes
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Publication number: 20180170041Abstract: A print head has a jet stack, a jet stack heating and temperature measuring element thermally connected to the jet stack, the jet stack heating and temperature measuring element including: a first, etched copper layer having heat spreading characteristics and including a resistive heat source electrically connected in series to a voltage source and a switch; an electrically insulative on a back side of the first copper layer; and a second, etched copper layer on a side of the electrically insulative layer opposite the first copper layer, the second copper layer having a temperature sensing element to sense a temperature of the print head without a thermistor, the temperature sensing element connected in series with a voltage source and a transistor. A print head may use a thermistor but the heat spreading layer eliminates the need for a heat sink to attach to the print head.Type: ApplicationFiled: February 15, 2018Publication date: June 21, 2018Inventors: CURTIS DOUGLASS KELLER, GAUTAM DHAR, DAVID LYLELL KNIERIM, CHAD DAVID FREITAG, JONATHAN ROBERT BRICK, DOUGLAS DEAN DARLING, NASSER ALAVIZADEH, BRADFORD STEWART, WILLIAM BRUCE WEAVER
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Patent number: 9931840Abstract: Print head jet stack heating and temperature measurement systems and methods are disclosed that both heat the jet stack and determine a temperature of the jet stack. The heating and temperature determination are performed by a flex circuit that includes multiple layers. One of the layers heats the jet stack and another one of the layers provides data that determines the temperature of the jet stack. The heating layer and the temperature sensing layer are separated by an insulative material in the flex circuit. The temperature of the jet stack can be sent to a print head controller that then determines whether to increase or decrease the temperature of the jet stack.Type: GrantFiled: August 22, 2013Date of Patent: April 3, 2018Assignee: XEROX CORPORATIONInventors: Curtis Douglass Keller, Gautam Dhar, David Lyell Knierim, Chad David Freitag, Jonathan Robert Brick, Douglas Dean Darling, Nasser Alavizadeh, Bradford Stewart, William Bruce Weaver
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Publication number: 20170135228Abstract: A method of forming an electrical interconnect includes etching a lattice pattern into a contact pad on a circuit substrate as a first connection point, at least partially filling the lattice pattern with a conductive epoxy, contacting the conductive epoxy with a second connection point, and curing the epoxy.Type: ApplicationFiled: January 19, 2017Publication date: May 11, 2017Inventors: Chad David Freitag, Tygh James Newton, Chad Johan Slenes
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Patent number: 9572254Abstract: An electrical interconnect has a circuit substrate and an electrical connection point on the circuit substrate. The electrical connection point includes a lattice of conductive material that is adjacent a gap in the circuit substrate and has anchor points that are attached to the circuit substrate. In some configurations, a conductive epoxy encapsulates at least a portion of the lattice of conductive material and may include a second electrical connection point that is bonded to the other electrical connection point through the conductive epoxy.Type: GrantFiled: January 17, 2012Date of Patent: February 14, 2017Assignee: XEROX CORPORATIONInventors: Chad David Freitag, Tygh James Newton, Chad Johan Slenes
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Patent number: 9358789Abstract: A method of manufacturing a flexible circuit, including forming a first set of traces, forming a second set of traces, and cutting a gap between the first and second set of traces.Type: GrantFiled: August 22, 2013Date of Patent: June 7, 2016Assignee: XEROX CORPORATIONInventors: Mirza Sabanovic, David P. Platt, Chad David Freitag, Joseph Andrew Broderick
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Publication number: 20150054878Abstract: Print head jet stack heating and temperature measurement systems and methods are disclosed that both heat the jet stack and determine a temperature of the jet stack. The heating and temperature determination are performed by a flex circuit that includes multiple layers. One of the layers heats the jet stack and another one of the layers provides data that determines the temperature of the jet stack. The heating layer and the temperature sensing layer are separated by an insulative material in the flex circuit. The temperature of the jet stack can be sent to a print head controller that then determines whether to increase or decrease the temperature of the jet stack.Type: ApplicationFiled: August 22, 2013Publication date: February 26, 2015Applicant: XEROX CORPORATIONInventors: Curtis Douglass Keller, Gautam Dhar, David Lyell Knierim, Chad David Freitag, Jonathan Robert Brick, Douglas Dean Darling, Nasser Alavizadeh, Bradford Stewart, William Bruce Weaver
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Patent number: 8801157Abstract: A liquid ink transport assembly mitigates the migration of ink dye from one conduit in a plurality of conduits to another conduit in the plurality of conduits. The liquid ink transport assembly includes a plurality of conduits, each conduit in the plurality having a first end and a second end, the conduits in the plurality being arranged in a parallel configuration with at least one conduit being spatially separated from an adjacent conduit by a first distance that is greater than a second distance spatially separating other conduits in the plurality of conduits, and a heater, the plurality of conduits being positioned proximate to a first side of the heater to enable the heater to heat ink being carried between the first and the second ends of the plurality of conduits.Type: GrantFiled: April 16, 2013Date of Patent: August 12, 2014Assignee: Xerox CorporationInventors: Chad David Freitag, Pratima G. N. Rao, Patricia A. Wang, Tony R. Rogers, Bhaskar T. Ramakrishnan
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Publication number: 20130333208Abstract: A method of manufacturing a flexible circuit, including forming a first set of traces, forming a second set of traces, and cutting a gap between the first and second set of traces.Type: ApplicationFiled: August 22, 2013Publication date: December 19, 2013Applicant: Xerox CorporationInventors: Mirza Sabanovic, David P. Platt, Chad David Freitag, Joseph Andrew Broderick
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Patent number: 8529022Abstract: A flexible circuit substrate has an integrated circuit mounted on the substrate, a first set of traces arranged to connect between a first voltage source and a first set of connectors on the integrated circuit, a second set of traces arranged to connect between a second voltage source and a second set of connectors on the integrated circuit, and a gap in the flexible circuit substrate between the first and second set of traces, the gap of sufficient width to stop an electrical arc-tracking between the first set of traces and the second set of traces. The substrate may have a second gap between the first gap and other traces.Type: GrantFiled: December 7, 2011Date of Patent: September 10, 2013Assignee: Xerox CorporationInventors: Mirza Sabanovic, David P Platt, Chad David Freitag, Joseph Andrew Broderick
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Patent number: 8529030Abstract: A check valve unit is provided for a high-speed phase change ink image producing machine between a reservoir for receiving and holding a volume of melted ink from a source and a receiving unit, which may be a printhead system. The check valve unit includes a plurality of ball elements trapped between upper and lower housings defining a like plurality of inlet and discharge passageways. The passageways are configured to optimize flow of melted ink through the unit during charging of the secondary reservoir. The check valve unit is scalable as to size and number of reservoirs for a particular application. The unit further incorporates features that simplify the manufacturing and assembly process while maintaining optimal performance.Type: GrantFiled: February 2, 2012Date of Patent: September 10, 2013Assignee: Xerox CorporationInventors: Ivan Andrew McCracken, Chad Johan Slenes, Tony Rogers, Shawn Michael Close, William Bruce Weaver, Chad David Freitag
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Publication number: 20130229472Abstract: A liquid ink transport assembly mitigates the migration of ink dye from one conduit in a plurality of conduits to another conduit in the plurality of conduits. The liquid ink transport assembly includes a plurality of conduits, each conduit in the plurality having a first end and a second end, the conduits in the plurality being arranged in a parallel configuration with at least one conduit being spatially separated from an adjacent conduit by a first distance that is greater than a second distance spatially separating other conduits in the plurality of conduits, and a heater, the plurality of conduits being positioned proximate to a first side of the heater to enable the heater to heat ink being carried between the first and the second ends of the plurality of conduits.Type: ApplicationFiled: April 16, 2013Publication date: September 5, 2013Applicant: Xerox CorporationInventors: Chad David Freitag, Pratima G.N. Rao, Patricia A. Wang, Tony R. Rogers, Bhaskar T. Ramakrishnan
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Publication number: 20130180771Abstract: An electrical interconnect has a circuit substrate and an electrical connection point on the circuit substrate. The electrical connection point includes a lattice of conductive material that is adjacent a gap in the circuit substrate and has anchor points that are attached to the circuit substrate. In some configurations, a conductive epoxy encapsulates at least a portion of the lattice of conductive material and may include a second electrical connection point that is bonded to the other electrical connection point through the conductive epoxy.Type: ApplicationFiled: January 17, 2012Publication date: July 18, 2013Applicant: XEROX CORPORATIONInventors: Chad David Freitag, Tygh James Newton, Chad Johan Slenes
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Patent number: 8469497Abstract: A liquid ink transport assembly mitigates the migration of ink dye from one conduit in a plurality of conduits to another conduit in the plurality of conduits. The liquid ink transport assembly includes a plurality of conduits, each conduit in the plurality having a first end and a second end, the conduits in the plurality being arranged in a parallel configuration with at least one conduit being spatially separated from an adjacent conduit by a first distance that is greater than a second distance spatially separating other conduits in the plurality of conduits, and a heater, the plurality of conduits being positioned proximate to a first side of the heater to enable the heater to heat ink being carried between the first and the second ends of the plurality of conduits.Type: GrantFiled: February 4, 2010Date of Patent: June 25, 2013Assignee: Xerox CorporationInventors: Chad David Freitag, Pratima G. N. Rao, Patricia A. Wang, Tony R. Rogers, Bhaskar T. Ramakrishnan
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Publication number: 20130147878Abstract: A flexible circuit substrate has an integrated circuit mounted on the substrate, a first set of traces arranged to connect between a first voltage source and a first set of connectors on the integrated circuit, a second set of traces arranged to connect between a second voltage source and a second set of connectors on the integrated circuit, and a gap in the flexible circuit substrate between the first and second set of traces, the gap of sufficient width to stop an electrical arc-tracking between the first set of traces and the second set of traces. The substrate may have a second gap between the first gap and other traces.Type: ApplicationFiled: December 7, 2011Publication date: June 13, 2013Inventors: Mirza Sabanovic, David P. Platt, Chad David Freitag, Joseph Andrew Broderick
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Patent number: 8308281Abstract: An ink umbilical provides different colors of heated ink to multiple print heads in an integrated structure. The ink umbilical includes a first plurality of ink carrying conduits mounted on one side of a heater and a second plurality of conduits mounted on a second side of the heater opposite the first side of the heater. The heater is operated to keep the ink in the conduits on each of the heater in a predetermined temperature range.Type: GrantFiled: May 2, 2011Date of Patent: November 13, 2012Assignee: Xerox CorporationInventors: Chad David Freitag, Roger G. Leighton, Ivan A. McCracken, Antonio St. Clair Lloyd Williams
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Publication number: 20120133714Abstract: A check valve unit is provided for a high-speed phase change ink image producing machine between a reservoir for receiving and holding a volume of melted ink from a source and a receiving unit, which may be a printhead system. The check valve unit includes a plurality of ball elements trapped between upper and lower housings defining a like plurality of inlet and discharge passageways. The passageways are configured to optimize flow of melted ink through the unit during charging of the secondary reservoir. The check valve unit is scalable as to size and number of reservoirs for a particular application. The unit further incorporates features that simplify the manufacturing and assembly process while maintaining optimal performance.Type: ApplicationFiled: February 2, 2012Publication date: May 31, 2012Applicant: XEROX CORPORATIONInventors: Ivan Andrew McCracken, Chad Johan Slenes, Tony Rogers, Shawn Michael Close, William Bruce Weaver, Chad David Freitag
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Patent number: 8162462Abstract: A check valve unit is provided for a high-speed phase change ink image producing machine between a reservoir for receiving and holding a volume of melted ink from a source and a receiving unit, which may be a printhead system. The check valve unit includes a plurality of ball elements trapped between upper and lower housings defining a like plurality of inlet and discharge passageways. The passageways are configured to optimize flow of melted ink through the unit during charging of the secondary reservoir. The check valve unit is scalable as to size and number of reservoirs for a particular application. The unit further incorporates features that simplify the manufacturing and assembly process while maintaining optimal performance.Type: GrantFiled: July 22, 2008Date of Patent: April 24, 2012Assignee: Xerox CorporationInventors: Ivan Andrew McCracken, Chad Johan Slenes, Tony Rogers, Shawn Michael Close, William Bruce Weaver, Chad David Freitag
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Patent number: 8083333Abstract: An ink umbilical interface facilitates removal of the umbilical from a printhead while better preserving the integrity of the interface seal. The ink umbilical interface includes an ink umbilical connector having a plurality of conduits terminating within the connector and a tapered nozzle extending from each conduit in the plurality of conduits, each conduit communicating with a liquid ink reservoir, a backplate of a printhead having a plurality of openings, each opening being positioned to receive one of the tapered nozzles extending from the ink umbilical connector, and at least one sealing member positioned between the backplate and the ink umbilical connector, the sealing member having at least one opening to align with one of the backplate openings and receive one of the tapered nozzles.Type: GrantFiled: November 17, 2008Date of Patent: December 27, 2011Assignee: Xerox CorporationInventors: Chad David Freitag, David Roland Koehler, Edward Charles Grenier