Patents by Inventor David A. VanKouwenberg

David A. VanKouwenberg 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: 11483435
    Abstract: A method is disclosed. For example, the method executed by a processor of a multi-function device (MFD) includes tracking a machine state of the MFD, predicting a potential defect based on a determination that the machine state is associated with a defect class of a plurality of different defect classes, determining a maintenance routine associated with the defect class, and executing the maintenance routine to prevent the potential defect.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: October 25, 2022
    Assignee: Xerox Corporation
    Inventors: Stuart A. Schweid, Martin L. Frachioni, David A. Vankouwenberg, David M. Gurak, Christopher Mieney
  • 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
  • Patent number: 11427021
    Abstract: An inkjet printhead assembly includes a controller operatively connected to an actuator so the controller can operate the actuator to tilt a carrier plate in which a plurality of printheads are mounted after a purge of the printheads has been performed. The tilt assists gravity in directing the purged ink to a wiper that is moved by another actuator operated by the controller to wipe the faceplates of one or more printhead faceplates in the carrier plate. After the wiper is returned to its home position, the carrier plate is returned to its level position and the printhead assembly is returned to its operational position for printing.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: August 30, 2022
    Assignee: Xerox Corporation
    Inventors: Joseph M. Ferrara, Jr., David A. VanKouwenberg, Jason M. LeFevre
  • 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
  • Publication number: 20220247888
    Abstract: A system and method enable determining a total colorant limit for printing images. The system includes memory which stores instructions for: determining a grain value for each of a set of printed patches printed on a first print media, the grain value being based upon a visual contrast sensitivity function computed for the respective patch, the set of printed patches including patches printed on the print media at different total colorant values; determining a total colorant limit for the first print media, as a function of the total colorant values and corresponding grain values for the printed patches in the set, wherein the total colorant limit is a total colorant value which corresponds to a grain value which does not exceed a threshold grain value for the first print media. A processor executes the instructions.
    Type: Application
    Filed: February 3, 2021
    Publication date: August 4, 2022
    Applicant: Xerox Corporation
    Inventors: Stuart A. Schweid, John T. Newell, Chu-Heng Liu, Roger L. Triplett, Mojgan Rabbani, Martin S. Maltz, David A. VanKouwenberg, Seemit Praharaj, Douglas R. Taylor, Martin L. Frachioni, Paul J. McConville
  • Patent number: 11376839
    Abstract: Examples of the preferred embodiments use an ink quantity metric (e.g., lightness L*, darkness, image density, line width) of printed content to determine thickness of fountain solution applied by a fountain solution applicator on an imaging member surface and/or determine image forming device real-time image forming modifications for subsequent printings. For example, in real-time during the printing of a print job, a sensor (e.g., spectrometer) may measure the ink quantity metric of the current printing on print substrate. Based on this measurement of printed content output from the image forming device, the image forming device may adjust image forming (e.g., fountain solution deposition flow rate) to reach or maintain a preferred fountain solution thickness on the imaging member surface for subsequent (e.g., next) printings of the print job.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: July 5, 2022
    Assignee: Xerox Corporation
    Inventors: Martin L. Frachioni, Christopher Mieney, David A. Vankouwenberg, David M. Gurak, Stuart A. Schweid
  • Publication number: 20220201129
    Abstract: A method is disclosed. For example, the method executed by a processor of a multi-function device (MFD) includes tracking a machine state of the MFD, predicting a potential defect based on a determination that the machine state is associated with a defect class of a plurality of different defect classes, determining a maintenance routine associated with the defect class, and executing the maintenance routine to prevent the potential defect.
    Type: Application
    Filed: December 21, 2020
    Publication date: June 23, 2022
    Inventors: Stuart A. Schweid, Martin L. Frachioni, David A. Vankouwenberg, David M. Gurak, Christopher Mieney
  • 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
  • Patent number: 11320737
    Abstract: According to aspects of the embodiments, there is provided a method of measuring the amount of fountain solution using a hot wire anemometer. Fountain solution thickness is measured using the flow rate of vaporized fountain solution and comparing to baseline air only flow rate. The vaporized measurement is correlated with the baseline utilizing specific heat, density and enthalpy values and keeping velocity of fluid constant. Changes in the measurement will then be related to the specific heat, density and enthalpy. Density can be back calculated to yield volume and knowing the area of the image being printed give a real time thickness value.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: May 3, 2022
    Assignee: Xerox Corporation
    Inventors: Christopher Mieney, David A. Vankouwenberg, Martin L. Frachioni, David M. Gurak, Stuart A. Schweid
  • Publication number: 20220063313
    Abstract: An inkjet printhead assembly includes a controller operatively connected to an actuator so the controller can operate the actuator to tilt a carrier plate in which a plurality of printheads are mounted after a purge of the printheads has been performed. The tilt assists gravity in directing the purged ink to a wiper that is moved by another actuator operated by the controller to wipe the faceplates of one or more printhead faceplates in the carrier plate. After the wiper is returned to its home position, the carrier plate is returned to its level position and the printhead assembly is returned to its operational position for printing.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 3, 2022
    Inventors: Joseph M. Ferrara, JR., David A. VanKouwenberg, Jason M. LeFevre
  • Publication number: 20210402755
    Abstract: Examples of the preferred embodiments use an ink quantity metric (e.g., lightness L*, darkness, image density, line width) of printed content to determine thickness of fountain solution applied by a fountain solution applicator on an imaging member surface and/or determine image forming device real-time image forming modifications for subsequent printings. For example, in real-time during the printing of a print job, a sensor (e.g., spectrometer) may measure the ink quantity metric of the current printing on print substrate. Based on this measurement of printed content output from the image forming device, the image forming device may adjust image forming (e.g., fountain solution deposition flow rate) to reach or maintain a preferred fountain solution thickness on the imaging member surface for subsequent (e.g., next) printings of the print job.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 30, 2021
    Inventors: Martin L. FRACHIONI, Christopher MIENEY, David A. VANKOUWENBERG, David M. GURAK, Stuart A. SCHWEID
  • Patent number: 11203202
    Abstract: An inkjet printhead includes a faceplate mounted to a printhead body. The faceplate has a first area in which an array of inkjet nozzle openings is positioned. The area is covered with a hydrophobic coating. A second area of the faceplate outside of the array of inkjet nozzle openings is covered with a first hydrophilic coating that does not contact the hydrophobic coating covering the first area. A third area of the faceplate between the first area and the second area is covered with a second hydrophilic coating. One end of the third area contacts the hydrophobic coating and another end of the third area contacts the first hydrophilic coating to pull ink emitted onto the hydrophobic coating during a purge operation to the second area of the faceplate.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: December 21, 2021
    Assignee: Xerox Corporation
    Inventors: Jason M. LeFevre, David A. VanKouwenberg, Joseph M. Ferrara, Jr.
  • Patent number: 11161355
    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 platen, a heater configured to direct heat toward the platen, at least one media transport belt configured to slide over the platen to move the substrates past the heater after the ink images have been formed on the substrates, and at least one belt diversion component configured to divert the at least one media belt from a straight-line path over the platen.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: November 2, 2021
    Assignee: Xerox Corporation
    Inventors: Paul J. McConville, Linn C. Hoover, Anthony S. Condello, Jason M. LeFevre, Seemit Praharaj, Douglas K. Herrmann, David A. VanKouwenberg, Chu-Heng Liu, Michael J. Levy
  • Patent number: 11117764
    Abstract: A vacuum roller system and a method of operating the vacuum roller system can include a group of vacuum rollers operable to move a sheet of media through a dryer. The vacuum rollers do not require a vacuum to be drawn between the vacuum rollers. Each vacuum roller can include a plenum operable to direct the vacuum to a top portion of the vacuum roller to drive the sheet of media from one roller to the next roller. The plenum can engage vacuum holes in a rotating vacuum roller when the vacuum holes in the vacuum roller are aligned with the plenum.
    Type: Grant
    Filed: November 10, 2019
    Date of Patent: September 14, 2021
    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: 11110709
    Abstract: A system for cleaning and treating a printhead includes (a) a movable carriage having affixed to a base of the movable carriage a cleaning blade and an absorptive pad, (b) a low vapor pressure organic solvent, the low vapor pressure organic solvent is deliverable to the absorptive pad via a pump, the low vapor pressure organic solvent has a vapor pressure lower than water and (c) a carriage moving mechanism that moves the carriage so that the cleaning blade and the absorptive pad pass over the printhead.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: September 7, 2021
    Assignee: XEROX CORPORATION
    Inventors: Michael J. Levy, Seemit Praharaj, Jason M. LeFevre, Linn C. Hoover, Paul J. McConville, Chu-heng Liu, Douglas K. Herrmann, David A. Vankouwenberg
  • Patent number: 11077679
    Abstract: A marker transport system and a method of operating the marker transport system can include one or more print heads and a marker transport platen upon which a sheet of media moves. The transport platen can include airflow sections comprising process-direction slots. The plates can move in a cross-process direction, and can control airflow in an area under the print heads. The one or more plates in a first position can allow for airflow when the sheet of media is located at the first position and in a second position can block the airflow at the second position. A vacuum can be provided under the sheet of media as the sheet of media traverses a print path across the marker transport platen. A no-vacuum inter-document zone can be provided, which moves along with the sheet of media under the one or more print heads.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: August 3, 2021
    Assignee: Xerox Corporation
    Inventors: David A. VanKouwenberg, Seemit Praharaj, Michael J. Levy, Douglas K. Herrmann, Paul McConville, Chu-Heng Liu, Linn C. Hoover, Jason M. Lefevre
  • Patent number: 11059289
    Abstract: A directionality detector is configured for use in an inkjet printer to attenuate the effects of ink drying in the nozzles of a printhead during printing operations. The directionality detector includes an optical sensor that generates image data of a test pattern formed on media by the printer, a diffuser that emits humidified air toward the media before the media is printed, and a controller operatively connected to the optical sensor and diffuser. The controller is configured compare the image data of the test pattern to stored image data of the test pattern printed at a previous time and determine whether any difference between the two images is greater than a predetermined threshold. The controller then operates the diffuser to direct humidified air toward the media passing the diffuser using the differences between the stored image data of the test pattern and the image data of the test pattern.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: July 13, 2021
    Assignee: Xerox Corporation
    Inventors: Seemit Praharaj, Douglas K. Herrmann, Paul J. McConville, Jason M. LeFevre, Chu-heng Liu, David A. VanKouwenberg, Michael J. Levy, Linn C. Hoover, Thomas J. Wyble, John P. Meyers
  • Publication number: 20210187988
    Abstract: A method includes printing, by one or more printer heads of the printing system, a reactive layer onto print media. The method also includes printing, by the one or more printer heads, a determined number of transmission layers and a determined number of barrier layers in alternation with one another. At least a portion of the reactive layer is configured to migrate through the transmission layers. The method further includes printing, by the one or more printer heads, a reactant layer that is configured to change color responsive to a reaction that occurs between the reactant layer and the reactive layer upon migration of the reactive layer through the determined number of transmission layers. The reaction is configured to occur on a received expiration date.
    Type: Application
    Filed: March 3, 2021
    Publication date: June 24, 2021
    Inventors: Linn C. Hoover, Erwin Ruiz, David A. VanKouwenberg, Paul M. Fromm, Jeffrey J. Bradway
  • Publication number: 20210187953
    Abstract: An environmental conditioner in an aqueous inkjet printer conditions the print zone in the printer so aqueous ink at the nozzles of the printheads maintains its low viscosity state and does not dry. The environmental conditioner includes a humidifying chamber having a reservoir configured to contain a volume of water, a heater configured to heat the water in the water reservoir to a predetermined temperature range, an air inlet to move air into the humidifying chamber, an air discharge configured to remove humidified air from the humidifying chamber and direct the humidified air into a space between a faceplate of a printhead and a path for media passing by the faceplate of the printhead. The chamber can include an ultrasonic atomizer to produce a moisturized mist for absorption by the heated air or wicking material to transfer moisture to the air.
    Type: Application
    Filed: December 18, 2019
    Publication date: June 24, 2021
    Inventors: Chu-Heng Liu, Douglas K. Herrmann, Paul J. McConville, Jason M. LeFevre, Seemit Praharaj, David A. VanKouwenberg, Michael J. Levy, Linn C. Hoover, Thomas J. Wyble, John P. Meyers