Patents by Inventor Linn C. Hoover

Linn C. Hoover 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).

  • Publication number: 20230034213
    Abstract: A three-dimensional (3D) metal object manufacturing apparatus is equipped with a vessel having a receptacle that holds melted metal. The vessel has a divider that prevents metal dross formed at a solid metal inlet of the receptacle to migrate to a portion of the receptacle where a melted metal level sensor directs light.
    Type: Application
    Filed: August 2, 2021
    Publication date: February 2, 2023
    Inventors: Jason M. LeFevre, Douglas K. Herrmann, Chu-Heng Liu, Seemit Praharaj, David A. VanKouwenberg, Linn C. Hoover
  • Publication number: 20230015142
    Abstract: A dross extraction system for a printer is disclosed, which includes an ejector defining an inner cavity associated therewith, the inner cavity retaining a liquid printing material. The dross extraction system also includes a first inlet coupled to the inner cavity of the ejector, a probe external to the ejector, which is selectably positionable to contact the liquid printing material to attract dross thereto, thereby extracting dross from the liquid printing material when the probe is withdrawn from the liquid printing material. A method of extracting dross from a metal jetting printer is also disclosed, which includes pausing an operation of the metal jetting printer, advancing a probe into a melt pool within a nozzle pump reservoir in the metal jetting printer, extracting dross from the metal printing material and onto the probe, retracting the probe from the nozzle pump reservoir, and resuming the operation of the metal jetting printer.
    Type: Application
    Filed: July 13, 2021
    Publication date: January 19, 2023
    Applicant: XEROX CORPORATION
    Inventors: Linn C. Hoover, Joseph C. Sheflin, Jason M. LeFevre, Seemit Praharaj, David Alan Vankouwenberg, Chu-Heng Liu, Douglas K. Herrmann, JR.
  • Patent number: 11547771
    Abstract: An apparatus includes, among other components, a frame adapted to be connected to the exterior surface of a device that has a touchscreen. A retractable cover is operatively connected to the frame. The size of the retractable cover is equal to at least the size of the touchscreen, and the retractable cover is positioned to extend so as to cover the touchscreen. At least one ultraviolet light is also operatively connected to the frame. The ultraviolet light is positioned to direct ultraviolet lighting toward the touchscreen when the retractable cover extends to cover the touchscreen.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: January 10, 2023
    Assignee: Xerox Corporation
    Inventors: Seemit Praharaj, Douglas K. Herrmann, Chu-Heng Liu, Paul J. McConville, Jason M. LeFevre, Linn C. Hoover, David A. VanKouwenberg
  • Patent number: 11541671
    Abstract: A universal object holding mechanism for holding three-dimensional objects for printing thereon uses multiple conformable balls mounted within a pattern of holes in a two part back plate. The multiple conformable balls are pressed into an object, which in turn, is pressed against a datum surface that represents desired spacing away from print heads. Vacuum is applied to the multiple conformable balls which grip the object. The multiple conformable balls are filled with particulates that cause the multiple conformable balls to become rigid when the vacuum is applied. This contributes to keeping the object from moving when it is being moved past a print head.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: January 3, 2023
    Assignee: Xerox Corporation
    Inventors: Jeffrey J Bradway, Linn C Hoover, Erwin Ruiz, Paul M Fromm
  • Patent number: 11541673
    Abstract: An aqueous ink printer is operated to insert media sheets from a first supply tray into a plurality of media sheets from a second tray on which ink images are being formed by the printer to absorb condensed vapors on media guides. The media sheets from the first tray are uncoated media and the media sheets from the second tray are coated media. In some embodiments, the inserted media sheets are printed with an ink image that has areas that contact the media guides with a greater ink density than other areas of the ink image that do not contact the media guides. Additionally or alternatively, the inserted media sheets are printed with an ink image that has areas that contact the media guides with an ink color that is different than an ink color used in other areas of the ink image that do not contact the media guides.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: January 3, 2023
    Assignee: Xerox Corporation
    Inventors: Linn C. Hoover, John Baker, David S. Derleth
  • Publication number: 20220402023
    Abstract: A dross abatement system for a printer is disclosed. The dross abatement system includes a print head ejector, a pump in communication with the print head ejector having an inner cavity, a first inlet coupled to the inner cavity, a supply of printing material external to the print head ejector, a heating element configured to heat the printing material in the ejector, and a supply of absorbent material external to the print head ejector. A method of abating dross in a metal jetting printer is also disclosed, which includes pausing an operation of the printer, advancing an absorbent material into a melt pool within a nozzle pump reservoir, wherein the melt pool may include a metal printing material, absorbing dross from the metal printing material, removing the absorbent material including the dross, and resuming operation of the metal jetting printer.
    Type: Application
    Filed: June 16, 2021
    Publication date: December 22, 2022
    Applicant: XEROX CORPORATION
    Inventors: Seemit Praharaj, Jason M. LeFevre, Douglas K. Herrmann, Chu-Heng Liu, David Alan VanKouwenberg, Linn C. Hoover
  • Patent number: 11499873
    Abstract: A method for determining a temperature of an object includes contacting the object with a first electrical conductor. A difference in electronegativity between the object and the first electrical conductor is greater than a predetermined value. The method also includes contacting the object or a substrate on which the object is positioned with a second electrical conductor. A difference in electronegativity between the object or the substrate and the second electrical conductor is less than the predetermined value. The method also includes connecting the first and second electrical conductors together. The method also includes measuring the temperature of the object using the first and second electrical conductors. The first and second electrical conductors form at least a portion of a thermocouple.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: November 15, 2022
    Assignee: XEROX CORPORATION
    Inventors: Christopher Douglas Atwood, Erwin Ruiz, David M. Kerxhalli, Douglas K. Herrmann, Linn C. Hoover, Derek A. Bryl, Ali R. Dergham
  • Patent number: 11485089
    Abstract: A method operates a three-dimensional (3D) metal object manufacturing system to maintain a temperature of an uppermost layer of a 3D metal object being formed within a temperature range conducive for bonding between the uppermost layer and a next layer to be formed. A controller of the system compares a temperature of the uppermost layer with at least a low end temperature of the temperature range and operates an electrical resistance switching network using 3D model data to provide electrical power selectively to heating elements in a modular heater to heat the 3D metal object being formed when the temperature indicated by the signal from the sensor is less than the predetermined temperature.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: November 1, 2022
    Assignee: Xerox Corporation
    Inventors: Ali R. Dergham, Douglas K. Herrmann, Christopher D. Atwood, Erwin Ruiz, Derek A. Bryl, Linn C. Hoover
  • Patent number: 11478991
    Abstract: A system for determining a temperature of an object includes a three-dimensional (3D) printer configured to successively deposit a first layer of material, a second layer of material, and a third layer of material to form the object. The 3D printer is configured to form a recess in the second layer of material. The material is a metal. The system also includes a temperature sensor configured to be positioned at least partially with the recess and to have the third layer deposited thereon. The temperature sensor is configured to measure a temperature of the first layer of material, the second layer of material, the third layer of material, or a combination thereof.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: October 25, 2022
    Assignee: XEROX CORPORATION
    Inventors: Christopher Douglas Atwood, Erwin Ruiz, David M. Kerxhalli, Douglas K. Herrmann, Linn C. Hoover, Derek A. Bryl, Ali R. Dergham
  • Patent number: 11483442
    Abstract: A method is disclosed. For example, the method executed by a processor of a multi-function device (MFD) includes monitoring operating parameters of a component in the MFD, calculating a life set point for the component based on the operating parameters, and changing a default life set point for the component stored in a memory of the MFD to the life set point that is calculated based on the operating parameters.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: October 25, 2022
    Assignee: Xerox Corporation
    Inventors: Rachel Lynn Tanchak, Erwin Ruiz, Carlos M. Terrero, Kareem Tawil, Linn C. Hoover
  • Publication number: 20220305818
    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 printhead to eject a print fluid through an opening of a 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 is to flow air through the carrier plate to the movable support surface via a port through the carrier plate on an inboard side the carrier plate and to control a flow rate of the air flowed through the port based on a size of a print medium transported by the media transport device.
    Type: Application
    Filed: March 29, 2021
    Publication date: September 29, 2022
    Applicant: XEROX CORPORATION
    Inventors: Linn C. HOOVER, Erwin RUIZ, Rachel Lynn TANCHAK, Kareem TAWIL, Carlos M. TERRERO
  • Publication number: 20220305815
    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: Application
    Filed: March 29, 2021
    Publication date: September 29, 2022
    Applicant: 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: 11453162
    Abstract: A system treats uneven surfaces of additive manufactured objects to improve the transparency and glossiness of the surfaces. The system operates an actuator to dip the additive manufactured object into a bath of fluid material that is the same as the material used to form the uneven surface to smooth the surface of the object and operates a sprayer to apply another fluid material to a surface of the object that is identified as being rougher based on the object's geometric data. A heater is provided to dry non-UV curable material applied to the object and a source of UV radiation is provided to cure UV curable material applied to the object.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: September 27, 2022
    Assignee: Xerox Corporation
    Inventors: Ron E. Dufort, Linn C. Hoover, Erwin Ruiz, Mandakini Kanungo
  • Publication number: 20220283683
    Abstract: Devices include first and second frame elements having mounting points connectable to opposite ends (e.g., first end, second end) of the touchscreen. First and second rollers are connected, respectively, to the first and second frame elements. A web of transparent material is supported by and between the first and second rollers. Further, an ultraviolet light device is connected to the second frame element and is positioned to expose the web of transparent material to ultraviolet radiation to disinfect the transparent material between users.
    Type: Application
    Filed: March 3, 2021
    Publication date: September 8, 2022
    Applicant: Xerox Corporation
    Inventors: Douglas K. Herrmann, Seemit Praharaj, Jason M. LeFevre, Paul J. McConville, Chu-heng Liu, Linn C. Hoover, David A. VanKouwenberg
  • Publication number: 20220257810
    Abstract: An apparatus includes, among other components, a frame adapted to be connected to the exterior surface of a device that has a touchscreen. A retractable cover is operatively connected to the frame. The size of the retractable cover is equal to at least the size of the touchscreen, and the retractable cover is positioned to extend so as to cover the touchscreen. At least one ultraviolet light is also operatively connected to the frame. The ultraviolet light is positioned to direct ultraviolet lighting toward the touchscreen when the retractable cover extends to cover the touchscreen.
    Type: Application
    Filed: February 17, 2021
    Publication date: August 18, 2022
    Applicant: Xerox Corporation
    Inventors: Seemit Praharaj, Douglas K. Herrmann, Chu-heng Liu, Paul J. McConville, Jason M. LeFevre, Linn C. Hoover, David A. VanKouwenberg
  • Patent number: 11383533
    Abstract: A printer is configured to apply marking material to print media to create a printed item, and a transport belt is positioned to receive the printed item from the printer and is configured to dry the marking material on the printed item. The transport belt has a middle layer attached between outer and inner layers, and the printed item contacts the outer layer. The outer and inner layers are non-perforated entangled fiber materials that are porous and that are more flexible than the middle layer.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: July 12, 2022
    Assignee: Xerox Corporation
    Inventors: Christopher M. Mieney, Paul M. Fromm, Linn C. Hoover
  • Publication number: 20220205845
    Abstract: An apparatus includes one or more layers of material printed by a three-dimensional (3D) printer. The one or more layers cool and solidify to form an object after being printed by the 3D printer. At least one of the one or more layers includes greater than 50% metal. The apparatus also includes a first temperature sensor in contact with the object. The first temperature sensor measures the temperature of the material while the object is being printed by the 3D printer, after the object has been printed by the 3D printer, or both.
    Type: Application
    Filed: March 17, 2022
    Publication date: June 30, 2022
    Applicant: XEROX CORPORATION
    Inventors: Christopher Douglas Atwood, Erwin Ruiz, David M. Kerxhalli, Douglas K. Herrmann, Linn C. Hoover, Derek A. Bryl, Ali R. Dergham
  • Publication number: 20220201131
    Abstract: A method is disclosed. For example, the method executed by a processor of a multi-function device (MFD) includes monitoring operating parameters of a component in the MFD, calculating a life set point for the component based on the operating parameters, and changing a default life set point for the component stored in a memory of the MFD to the life set point that is calculated based on the operating parameters.
    Type: Application
    Filed: December 22, 2020
    Publication date: June 23, 2022
    Inventors: Rachel Lynn Tanchak, Erwin Ruiz, Carlos M. Terrero, Kareem Tawil, Linn C. Hoover
  • Patent number: 11325799
    Abstract: A vacuum roller system and a method of operation the vacuum roller system can include an assembly of interdigitated rollers, and a vacuum system, wherein the assembly of interdigitated rollers is operably connected to the vacuum system to move sheets of media through a downstream dryer in a printer, wherein a vacuum is drawn between individual rollers among the assembly of interdigitated rollers so that the vacuum is distributed across a sheet of media and is split around the individual rollers. The spacing between the individual rollers among the assembly of interdigitated rollers is variable to vary the vacuum.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: May 10, 2022
    Assignee: Xerox Corporation
    Inventors: Douglas K. Herrmann, Seemit Praharaj, Michael J. Levy, Jason M. Lefevre, Paul McConville, Chu-heng Liu, Linn C. Hoover, David A. VanKouwenberg
  • Patent number: 11318760
    Abstract: An inkjet printer includes a dryer configured to attenuate the effects of temperature differentials arising in substrates that are caused by holes in a media transport belt and a platen covering a vacuum plenum. The dryer includes a heater, a media transport belt cooler, and a media transport belt. The media transport belt is configured to move substrates past the heater after ink images have been formed on the substrates and the media transport belt cooler is positioned to remove heat energy from the media transport belt after the media transport belt has passed the heater and the substrates have separated from the media transport belt. The substrate cooler is configured to reduce a temperature of the media transport belt to a temperature that attenuates image defects arising from temperature differentials in the media transport belt when the media transport belt is opposite the heater.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: May 3, 2022
    Assignee: Xerox Corporation
    Inventors: Linn C. Hoover, Douglas K Herrmann, Paul J. McConville, Jason M. LeFevre, Seemit Praharaj, David A. VanKouwenberg, Michael J. Levy, Chu-heng Liu, Santokh S. Badesha, Christopher Mieney, David S. Derleth