Patents by Inventor Rachael L. McGrath
Rachael L. McGrath 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: 9884480Abstract: Functional amine release agents displaying improved wetting as compared to standard silicone oils comprise a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl, in which the concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0006 meq/g and the release agents have a viscosity of 20 cSt and 10 cSt. In an in-line tandem print system, the 20 cSt release agent is used in the upstream print engine while the 10 cSt release agent is used in the downstream print engine.Type: GrantFiled: October 19, 2016Date of Patent: February 6, 2018Assignee: Xerox CorporationInventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Publication number: 20170036440Abstract: Functional amine release agents displaying improved wetting as compared to standard silicone oils comprise a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl, in which the concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0006 meq/g and the release agents have a viscosity of 20 cSt and 10 cSt. In an in-line tandem print system, the 20 cSt release agent is used in the upstream print engine while the 10 cSt release agent is used in the downstream print engine.Type: ApplicationFiled: October 19, 2016Publication date: February 9, 2017Inventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Patent number: 9481164Abstract: Functional amine release agents displaying improved wetting as compared to standard silicone oils comprise a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl, in which the concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0006 meq/g and the release agents have a viscosity of 20 cSt and 10 cSt. In an in-line tandem print system, the 20 cSt release agent is used in the upstream print engine while the 10 cSt release agent is used in the downstream print engine.Type: GrantFiled: April 24, 2014Date of Patent: November 1, 2016Assignee: Xerox CorporationInventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Patent number: 9296219Abstract: A functional amine release agent displaying reduced coefficient of friction as compared to standard silicone oils, comprises a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl. The concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0001 meq/g. According to certain embodiments, the functional amine release agent is operable to impart a coefficient of friction of about 0.5 or more to the print media, resulting in improved finishing and converting equipment interaction. The release agent may have a viscosity of about 50 cSt.Type: GrantFiled: November 11, 2015Date of Patent: March 29, 2016Assignee: Xerox CorporationInventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Publication number: 20160067956Abstract: A functional amine release agent displaying reduced coefficient of friction as compared to standard silicone oils, comprises a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl. The concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0001 meq/g. According to certain embodiments, the functional amine release agent is operable to impart a coefficient of friction of about 0.5 or more to the print media, resulting in improved finishing and converting equipment interaction. The release agent may have a viscosity of about 50 cSt.Type: ApplicationFiled: November 11, 2015Publication date: March 10, 2016Inventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Patent number: 9221245Abstract: A functional amine release agent displaying reduced coefficient of friction as compared to standard silicone oils, comprises a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl. The concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0001 meq/g. According to certain embodiments, the functional amine release agent is operable to impart a coefficient of friction of about 0.5 or more to the print media, resulting in improved finishing and converting equipment interaction. The release agent may have a viscosity of about 50 cSt.Type: GrantFiled: April 24, 2014Date of Patent: December 29, 2015Assignee: Xerox CorporationInventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Publication number: 20150307727Abstract: Functional amine release agents displaying improved wetting as compared to standard silicone oils comprise a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl, in which the concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0006 meq/g and the release agents have a viscosity of 20 cSt and 10 cSt. In an in-line tandem print system, the 20 cSt release agent is used in the upstream print engine while the 10 cSt release agent is used in the downstream print engine.Type: ApplicationFiled: April 24, 2014Publication date: October 29, 2015Applicant: Xerox CorporationInventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Publication number: 20150306867Abstract: A functional amine release agent displaying reduced coefficient of friction as compared to standard silicone oils, comprises a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl. The concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0001 meq/g. According to certain embodiments, the functional amine release agent is operable to impart a coefficient of friction of about 0.5 or more to the print media, resulting in improved finishing and converting equipment interaction. The release agent may have a viscosity of about 50 cSt.Type: ApplicationFiled: April 24, 2014Publication date: October 29, 2015Applicant: Xerox CorporationInventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Patent number: 9108427Abstract: A functional amine release agent displaying improved wetting ability as compared to standard silicone oils comprises a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl; wherein the concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0006 meq/g and a viscosity of 20 cSt. The release agent may be particularly useful in a single engine duplex printing system.Type: GrantFiled: April 24, 2014Date of Patent: August 18, 2015Assignee: Xerox CorporationInventors: Jason M. LeFevre, Paul J. McConville, James M. Chappell, Joanne L. Lee, Rachael L. McGrath, Santokh S. Badesha
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Publication number: 20150210066Abstract: There is described a transfer member or blanket for use in aqueous ink jet printer. The transfer member includes a surface layer that includes a fluoropolymer and 3-aminopropyl trimethoxy silane wherein the 3-aminopropyl trimethoxy silane is present in an amount of from about 1 weight percent to about 10 weight percent. A method of manufacturing the transfer member is described.Type: ApplicationFiled: January 28, 2014Publication date: July 30, 2015Applicant: Xerox CorporationInventors: Matthew Michael Kelly, Srinivas Mettu, Anthony Salvatore Condello, Santokh S. Badesha, Mandakini Kanungo, David Joseph Gervasi, Chu-heng Liu, Rachael L. McGrath
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Patent number: 9056464Abstract: An inkjet printer and method therefore including a detector to monitor a quantity of release agent applied to a spreader drum. The inkjet printer includes a drum maintenance unit which applies the release agent to the spreader drum with a metering device, such as a metering blade, and determines a flow rate of unused release agent returned to a release agent sump. The determined flow rate of release agent provides a determination of the quantity of release agent applied to the spreader drum. Upon the determination that too much release agent has been applied based on the flow rate, an alert signal is generated indicating that the metering blade should be inspected and replaced if necessary. Monitoring the amount of release agent applied to the spreader drum in this way enables a more robust printing and in-line coating system.Type: GrantFiled: July 16, 2013Date of Patent: June 16, 2015Assignee: Xerox CorporationInventors: James Michael Chappell, Jason Matthew LeFevre, Paul J. McConville, Rachael L. McGrath
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Publication number: 20150022570Abstract: An inkjet printer and method therefore including a detector to monitor a quantity of release agent applied to a spreader drum. The inkjet printer includes a drum maintenance unit which applies the release agent to the spreader drum with a metering device, such as a metering blade, and determines a flow rate of unused release agent returned to a release agent sump. The determined flow rate of release agent provides a determination of the quantity of release agent applied to the spreader drum. Upon the determination that too much release agent has been applied based on the flow rate, an alert signal is generated indicating that the metering blade should be inspected and replaced if necessary. Monitoring the amount of release agent applied to the spreader drum in this way enables a more robust printing and in-line coating system.Type: ApplicationFiled: July 16, 2013Publication date: January 22, 2015Inventors: James Micheal Chappell, Jason Matthew LeFevre, Paul J. McConvill, Rachael L. McGrath
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Patent number: 8913934Abstract: A system to combine the transfer and fixing xerographic steps of a xerographic printer into one, as well as to eliminate the need for an electrical field for transfer. The image is transfixed directly from a photoconductor to the paper or other suitable substrate. Appropriate pressure is applied during this step to cold-pressure fix the toner on the paper, taking into account the type of substrate and type of toner. The cold pressure transfix can be done either directly from a photoreceptor, without an intermediate transfer belt (ITB), eliminating all electrostatic transfer subsystems and a fusing operation. Alternatively, for engines with an intermediate transfer belt (ITB), the cold pressure transfix could replace a needed second transfer and fuser system.Type: GrantFiled: July 7, 2010Date of Patent: December 16, 2014Assignee: Xerox CorporationInventors: George C Cardoso, John F Knapp, Rachael L Mcgrath, Dale R Mashtare
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Patent number: 8854634Abstract: An indirect printer includes a system for alternating the pressure in a transfer nip by manipulating the transfer roller. The system includes a pair of pivotable collars mounted about the ends of the transfer roller. The collars are pivoted towards or away from one another to bend the transfer roller and to increase or decrease, respectively, the pressure in the longitudinal center of the nip.Type: GrantFiled: June 14, 2012Date of Patent: October 7, 2014Assignee: Xerox CorporationInventors: Bruce E. Thayer, Bin Zhang, Palghat S. Ramesh, Rachael L. McGrath, Christopher A. DiRubio
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Patent number: 8833895Abstract: An image transfer system for use in an indirect printer includes a support roller for a transfix roller. The support roller is configured to apply pressure to a center portion of a nip formed between a transfix roller and an imaging drum while the transfix roller applies pressure to the ends of the nip. This configuration is particularly advantageous for use with imaging drums and transfix rollers having thin walls.Type: GrantFiled: May 4, 2012Date of Patent: September 16, 2014Assignee: Xerox CorporationInventors: Bruce E. Thayer, Bin Zhang, Palghat S. Ramesh, Rachael L. McGrath, Christopher A. DiRubio
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Patent number: 8668302Abstract: An inkjet printer includes a plurality of color separation modules. Each color separation module includes an image receiving member and a printhead module configured to eject ink drops onto the image receiving member to form a color separation on the image receiving member. The printer is configured to transfix each color separation on each image receiving member to a single sheet to produce a composite ink image on the print medium after the print medium has passed by all of the color separation modules in the printer.Type: GrantFiled: June 13, 2012Date of Patent: March 11, 2014Assignee: Xerox CorporationInventors: Palghat S. Ramesh, Bruce E. Thayer, Rachael L. McGrath
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Patent number: 8646893Abstract: A printer includes an image drum temperature regulation system that helps reduce thermal gradients on the image drum surface. The image drum temperature regulation system includes a feedback controller and a feed-forward controller. The image drum temperature regulation system operates the heaters and fan of the image drum with reference to a temperature difference between actual temperature of the image drum and a temperature setpoint and to the thermal effect of ejecting an ink image onto the image drum.Type: GrantFiled: June 19, 2012Date of Patent: February 11, 2014Assignee: Xerox CorporationInventors: Palghat S. Ramesh, Bruce Earl Thayer, David A. VanKouwenberg, Rachael L. McGrath, Trevor J. Snyder, Walter Sean Harris
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Publication number: 20130335752Abstract: An indirect printer includes a system for alternating the pressure in a transfer nip by manipulating the transfer roller. The system includes a pair of pivotable collars mounted about the ends of the transfer roller. The collars are pivoted towards or away from one another to bend the transfer roller and to increase or decrease, respectively, the pressure in the longitudinal center of the nip.Type: ApplicationFiled: June 14, 2012Publication date: December 19, 2013Applicant: Xerox CorporationInventors: Bruce E. Thayer, Bin Zhang, Palghat S. Ramesh, Rachael L. McGrath, Christopher A. DiRubio
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Publication number: 20130335473Abstract: An inkjet printer includes a plurality of color separation modules. Each color separation module includes an image receiving member and a printhead module configured to eject ink drops onto the image receiving member to form a color separation on the image receiving member. The printer is configured to transfix each color separation on each image receiving member to a single sheet to produce a composite ink image on the print medium after the print medium has passed by all of the color separation modules in the printer.Type: ApplicationFiled: June 13, 2012Publication date: December 19, 2013Applicant: XEROX CORPORATIONInventors: Palghat S. Ramesh, Bruce E. Thayer, Rachael L. McGrath
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Publication number: 20130335476Abstract: A printer includes an image drum temperature regulation system that helps reduce thermal gradients on the image drum surface. The image drum temperature regulation system includes a feedback controller and a feed-forward controller. The image drum temperature regulation system operates the heaters and fan of the image drum with reference to a temperature difference between actual temperature of the image drum and a temperature setpoint and to the thermal effect of ejecting an ink image onto the image drum.Type: ApplicationFiled: June 19, 2012Publication date: December 19, 2013Applicant: XEROX CORPORATIONInventors: Palghat S. Ramesh, Bruce Earl Thayer, David A. VanKouwenberg, Rachael L. McGrath, Trevor Snyder, Walter Sean Harris