Patents by Inventor James Spence

James Spence 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).

  • Patent number: 12005700
    Abstract: A printing system comprises an ink deposition assembly and a media transport assembly. The ink deposition assembly comprises a printhead arranged to eject a print fluid to a deposition region of the ink deposition assembly. The media transport assembly comprises a vacuum source and a movable support surface. The movable support surface comprises valves having holes through the media support surface. The media transport assembly is configured to hold one or more print media against the movable support surface by vacuum suction communicated from the vacuum source through valves. The valves are each configured to transition between a closed state in which airflow through the hole of the respective valve is prevented and an open state in which airflow through the hole of the respective valve is allowed.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: June 11, 2024
    Assignee: XEROX CORPORATION
    Inventors: Brian M. Balthasar, John Patrick Baker, Emmett James Spence, Robert Jian Zhang, Megan Zielenski
  • Patent number: 11850842
    Abstract: A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a carrier plate and a printhead arranged to eject a print fluid through an opening of the carrier plate to a deposition region. The media transport device holds a print medium against the movable support surface by vacuum suction and transports the print medium through the deposition region. The air flow control system comprises an air supply unit comprising air flow guide structure extending into the opening of the carrier plate between the carrier plate and the printhead to flow air through the opening. The air flow control system controls the air supply unit to selectively flow the air based on a location of a print medium relative to the printhead.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: December 26, 2023
    Assignee: XEROX CORPORATION
    Inventors: Patrick Jun Howe, John Patrick Baker, Brian M. Balthasar, Glenn Batchelor, Anthony Salvatore Condello, Ali R. Dergham, Timothy P. Foley, Douglas K. Herrmann, Richard A. Kalb, Peter John Knausdorf, Jason M. LeFevre, Jack T. Lestrange, Chu-Heng Liu, Paul J. McConville, Seemit Praharaj, Palghat S. Ramesh, Joseph C. Sheflin, Emmett James Spence, Robert Jian Zhang, Megan Zielenski
  • Patent number: 11772391
    Abstract: A printing system comprises a media transport device which holds print media, such as paper, against a movable support surface, such as a belt, by vacuum suction through holes in the media transport device and transports the print media though a deposition region of one or more printheads, which deposit a print fluid, such as ink, on the print media. The printing system comprises an airflow control device comprising one or more dampers that are moveable in a cross-process direction between an undeployed configuration and a deployed configuration, each damper blocking at least one row of the holes in the deployed configuration. The airflow control device also comprises one or more actuators to move the damper(s). The actuator(s) are controlled to selectively move the damper(s) between the undeployed and deployed configuration based on a position of an inter-media zone between adjacent print media held against the movable support surface.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: October 3, 2023
    Assignee: Xerox Corporation
    Inventors: Megan Zielenski, John Patrick Baker, Brian M. Balthasar, Emmett James Spence, Robert Jian Zhang
  • Patent number: 11697296
    Abstract: A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a carrier plate and a printhead arranged to eject a print fluid through an opening of the carrier plate to a deposition region. The media transport device comprises a movable support surface to transport a print medium along a process direction through the deposition region, the media transport device holding the print medium against the movable support surface by vacuum suction. The air flow control system is arranged to selectively flow air through the opening of the carrier plate between the carrier plate and the printhead based on a location of a print medium transported by the media transport device relative to the printhead.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: July 11, 2023
    Assignee: Xerox Corporation
    Inventors: Douglas K. Herrmann, Linn C. Hoover, Patrick Jun Howe, Joseph C. Sheflin, Robert Jian Zhang, John Patrick Baker, Brian M. Balthasar, Glenn Batchelor, Anthony Salvatore Condello, Ali R. Dergham, Timothy P. Foley, Richard A. Kalb, Peter John Knausdorf, Jason M. LeFevre, Jack T. Lestrange, Chu-Heng Liu, Paul J. McConville, Seemit Praharaj, Palghat S. Ramesh, Erwin Ruiz, Emmett James Spence, Rachel Lynn Tanchak, Kareem Tawil, Carlos M. Terrero, Megan Zielenski
  • Patent number: 11332653
    Abstract: The present invention relates to drilling fluid comprising one or more linear internal olefin having from 15 to 18 carbon atoms and containing less than 25% branching based on the total amount of the linear internal olefin and a hydrogenated Fischer-Tropsch derived product.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: May 17, 2022
    Assignee: SHELL OIL COMPANY
    Inventors: Burnell Lee, David Matthew Brown, Graham Francis Whale, Michael James Spence, Delina Yvonne-Marie de Souza Lyon
  • Patent number: 11322905
    Abstract: A single longitudinal mode ring Raman laser including: a pump source outputting a pump light power, resonantly coupled to a first ring resonator; a optical measurement and piezo-actuator for stabilising the resonant coupling of the pump light power to a first ring resonator; a first ring resonator including a Raman gain medium, wherein the Raman gain medium receives the pump light power and undergoes Raman lasing generating resonated Stokes power at the corresponding Stokes output wavelength; the first ring resonator acting as a feedback loop for the pump light power and the resonated Stokes power and outputting a portion of the Stokes power as the laser output.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: May 3, 2022
    Assignee: Macquarie University
    Inventors: David James Spence, Ondrej Kitzler, Jipeng Lin, Richard Paul Mildren, Helen M. Pask, Graeme P. A. Malcolm, Nils Hempler, Stephen Webster
  • Patent number: 11028705
    Abstract: A transition piece can include: an inner transition piece providing a gas channel; a plurality of cooling rings disposed on the inner transition piece; a plurality of film holes formed on the inner transition piece; and a plurality of impingement holes formed on the plurality of cooling rings, wherein the plurality of film holes are arranged to correspond to the plurality of cooling rings. Each of the plurality of cooling rings includes a cavity such that the plurality of film holes connect the cavity to the gas channel and the plurality of impingement holes connect the cavity to an outside of the inner transition piece.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: June 8, 2021
    Assignee: Doosan Heavy Industries Construction Co., Ltd.
    Inventors: Esam Abu-Irshaid, Michael Brody, Kevin James Spence
  • Publication number: 20210075182
    Abstract: A single longitudinal mode ring Raman laser including: a pump source outputting a pump light power, resonantly coupled to a first ring resonator; a optical measurement and piezo-actuator for stabilising the resonant coupling of the pump light power to a first ring resonator; a first ring resonator including a Raman gain medium, wherein the Raman gain medium receives the pump light power and undergoes Raman lasing generating resonated Stokes power at the corresponding Stokes output wavelength; the first ring resonator acting as a feedback loop for the pump light power and the resonated Stokes power and outputting a portion of the Stokes power as the laser output.
    Type: Application
    Filed: December 22, 2017
    Publication date: March 11, 2021
    Applicant: Macquarie University
    Inventors: David James Spence, Ondrej Kitzler, Jipeng Lin, Richard Paul Mildren, Helen M. Pask, Graeme P. A. Malcolm, Nils Hempler, Stephen Webster
  • Patent number: 10944232
    Abstract: A frequency electromagnetic radiation generation system including: a non linear crystal producing THz frequency electromagnetic radiation; a fundamental beam that interacts with the non linear crystal thereby emitting a THz frequency electromagnetic radiation emission; a silicon intermediary coupled to the non linear crystal for output channeling the THz frequency electromagnetic radiation emission to an output environment; the system utilising a fundamental beam which has a photon energy below the bandgap energy of silicon.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: March 9, 2021
    Assignee: Macquarie University
    Inventors: Andrew Lee, Helen M. Pask, David James Spence
  • Patent number: 10590797
    Abstract: A combustion system can include: a liner defining a combustion chamber; a casing covering the combustion chamber; a first tube disposed in the liner; a machined union disposed inside the casing and connected to the first tube; a second tube passing through the casing and connected to the machined union; a sensor housing disposed outside the casing and connected to the second tube; and an infinite tube connected to the sensor housing.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: March 17, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Esam Abu-Irshaid, Kevin James Spence
  • Publication number: 20190280456
    Abstract: A Raman Laser device having an nth Stokes shifted output the device including: a laser pump input; a lasing cavity having feedback elements at each end; and a diamond Raman active gain medium within the cavity, exhibiting first and higher Stokes emissions when subjected to pumping by the laser pump input; wherein the feedback elements feeding back the pump input, and 1st Stokes output from the gain medium, and a gain portion of the higher Stokes outputs, with a transmitting portion of the nth Stokes output being the output of the device.
    Type: Application
    Filed: September 21, 2017
    Publication date: September 12, 2019
    Applicant: Macquarie University
    Inventors: Robert Williams, Richard Paul Mildren, David James Spence, Oliver Lux
  • Publication number: 20180323572
    Abstract: A Raman laser device including: a Raman lasing medium adapted to undergo Raman lasing; and at least one pumping beam, for pumping a Stokes seed beam by stimulated Raman scattering whilst it traverses the Raman lasing medium.
    Type: Application
    Filed: November 18, 2016
    Publication date: November 8, 2018
    Inventors: Richard Paul Mildren, Aaron McKay, David James Spence, David Coutts
  • Patent number: 9941660
    Abstract: A tunable lasing device including a vertical external cavity surface emitting laser, adapted to generate a fundamental laser beam in response to pumping from a pump source, said fundamental laser beam having a fundamental wavelength and a fundamental linewidth; a fundamental resonator cavity adapted to resonate the fundamental beam therein; a first optical element located within the fundamental resonator cavity for control of the fundamental linewidth of the fundamental beam; a Raman resonator located at least partially in said fundamental resonator adapted to receive the fundamental beam and comprising therein, a solid state Raman active medium located therein for generating at least a first Stokes beam from the fundamental beam wherein said Raman resonator cavity is adapted to resonate said Stokes beam therein and further adapted to emit an output beam; and further comprising a nonlinear medium located within the Raman resonator cavity for nonlinear frequency conversion of at least one of the beams present
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: April 10, 2018
    Assignee: Macquarie University
    Inventors: Jipeng Lin, Helen M. Pask, David James Spence, Craig J. Hamilton, Graeme P. A. Malcolm
  • Patent number: 9837787
    Abstract: A method and system for generating a Raman second Stokes light to a source light comprising generating a Raman first Stokes light from the source light by a Raman interaction in a nonlinear optical medium disposed in an optical resonator, and resonating the Raman first Stokes light in the optical resonator; generating a seed light at the frequency of the Raman second Stokes light from the source light and the Raman first Stokes light by a four wave mixing process which is not phase matched in the nonlinear medium; amplifying the seed light by transferring power from the first Stokes light resonating in the optical resonator to the seed light using a Raman amplification process in the nonlinear medium; and extracting from the optical resonator a majority of the power of the seed light so amplified.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: December 5, 2017
    Assignee: MACQUARIE UNIVERSITY
    Inventors: David James Spence, David Coutts, Richard Paul Mildren, Helen Margaret Pask, Jipeng Lin, Aravindan Warrier
  • Patent number: 9586426
    Abstract: An apparatus, method and non-transitory computer readable medium for printing on a profile of a printing medium having an irregular surface are disclosed. For example, the apparatus includes a print bar having one or more print heads, a shuttle, a loading carriage for holding the printing medium, wherein the loading carriage is coupled to the shuttle, a profile template coupled to the loading carriage via a cam follower and a controller coupled to the print bar and the shuttle, wherein the controller controls movement of the shuttle to cause the cam follower to move the loading carriage along a path that follows the profile of the printing medium and maintain a minimum print head gap during printing between the one or more print heads and the profile of the printing medium.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: March 7, 2017
    Assignee: Xerox Corporation
    Inventor: James Spence
  • Publication number: 20150325976
    Abstract: A laser configured to optimise output power at a desired wavelength, by suppression of unwanted Stokes orders in a Raman cascade, the laser comprising a resonating structure configured to resonate precursor light and Raman light frequencies, having a Raman medium configured to interact with the precursor resonating light to generate the Raman light; a control nonlinear medium configured to reduce an extraction of power from the precursor resonating light by the Raman process; and an output nonlinear medium configured to interact with the precursor resonating light to generate a desired output light thereby extracting power from the precursor resonating light; whereby the control nonlinear medium reduces the extraction of power from the precursor resonating light by the Raman process to enhance the extraction of power from the precursor resonating light by the output nonlinear medium interacting with the precursor resonating light thereby increasing the power of desired output the light.
    Type: Application
    Filed: July 5, 2013
    Publication date: November 12, 2015
    Applicant: Macquarie University
    Inventors: David James Spence, Helen Margaret Pask, Andrew Lee
  • Publication number: 20140269787
    Abstract: A tunable lasing device including a vertical external cavity surface emitting laser, adapted to generate a fundamental laser beam in response to pumping from a pump source, said fundamental laser beam having a fundamental wavelength and a fundamental linewidth; a fundamental resonator cavity adapted to resonate the fundamental beam therein; a first optical element located within the fundamental resonator cavity for control of the fundamental linewidth of the fundamental beam; a Raman resonator located at least partially in said fundamental resonator adapted to receive the fundamental beam and comprising therein, a solid state Raman active medium located therein for generating at least a first Stokes beam from the fundamental beam wherein said Raman resonator cavity is adapted to resonate said Stokes beam therein and further adapted to emit an output beam; and further comprising a nonlinear medium located within the Raman resonator cavity for nonlinear frequency conversion of at least one of the beams present
    Type: Application
    Filed: November 9, 2012
    Publication date: September 18, 2014
    Applicant: Macquarie University
    Inventors: Jipeng Lin, Helen M. Pask, David James Spence, Craig J. Hamilton, Graeme P. Malcolm
  • Patent number: 8668318
    Abstract: A leveling and spreading system has been developed that enables the speed and position of the web to be determined from a sensor on a first roller. In a duplex print process, the first roller also reduces a temperature of the media web and an ink image printed in the first side print operation to within a first predetermined temperature range. A second roller modulates the temperature of the media web and ink ejected onto the media web immediately before the web enters the leveling and spreading system to within a second predetermined temperature range to enable uniformity of the ink and web temperatures for spreading the ink in a nip formed with a third roller.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: March 11, 2014
    Assignee: Xerox Corporation
    Inventors: James M. Chappell, Jason M. LeFevre, James E. Williams, Paul McConville, Paul S. Bonino, James Spence, Roger G. Leighton, Michael F. Leo, Joseph C. Sheflin, Michael J. Levy, Howard A. Mizes
  • Publication number: 20140028747
    Abstract: A leveling and spreading system has been developed that enables the speed and position of the web to be determined from a sensor on a first roller. In a duplex print process, the first roller also reduces a temperature of the media web and an ink image printed in the first side print operation to within a first predetermined temperature range. A second roller modulates the temperature of the media web and ink ejected onto the media web immediately before the web enters the leveling and spreading system to within a second predetermined temperature range to enable uniformity of the ink and web temperatures for spreading the ink in a nip formed with a third roller.
    Type: Application
    Filed: July 26, 2012
    Publication date: January 30, 2014
    Applicant: XEROX CORPORATION
    Inventors: James M. Chappell, Jason M. LeFevre, James E. Williams, Paul McConville, Paul S. Bonino, James Spence, Roger G. Leighton, Michael F. Leo, Joseph C. Sheflin, Michael J. Levy, Howard A. Mizes
  • Patent number: 8345717
    Abstract: A continuous wave Raman laser for producing visible laser output comprising: a resonator cavity; at least a first reflector and a second reflector said first and second reflectors being located at opposite ends of the resonator cavity; a laser gain medium located in the resonator cavity for generating a continuous wave fundamental beam which resonates within the resonator cavity when pumped by a pump beam from a pump source external to the resonator cavity; a solid Raman-active medium positioned in the resonator cavity for Raman shifting the fundamental beam to produce a continuous wave Raman beam which resonates within the resonator cavity; and a non-linear medium positioned in the resonator cavity for frequency converting the continuous wave Raman beam to a converted wavelength to produce a continuous wave converted beam.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: January 1, 2013
    Assignee: Macquarie University
    Inventors: Peter Dekker, Helen Margaret Pask, James Austin Piper, David James Spence