Patents by Inventor Michael J. Levy

Michael J. Levy 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: 20220203749
    Abstract: According to aspects of the embodiments, there is provided a method of measuring the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is measured using a glass roll at a lower temperature than the fountain solution. The lower temperature causes the fountain solution to undergo a change in state and in a solid state the fountain solution crystalizes and changes roll opacity with the thickness of the film. When radiated with a light source the opacity is continuously measured through the surface of the roller. The thickness of the crystallized fountain solution can then be determined via the opacity level increase by the crystallization and the impact to the opacity on the glass roll.
    Type: Application
    Filed: December 30, 2020
    Publication date: June 30, 2022
    Inventors: Douglas K. HERRMANN, Chu-heng LIU, Seemit PRAHARAJ, Paul J. MCCONVILLE, Jason M. LEFEVRE, Michael J. LEVY
  • 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: 11243121
    Abstract: An indicator tag and a method for fabricating the same are disclosed. For example, the indicator tag includes a three-dimensional mesh comprising a plurality of pores, wherein the three-dimensional mesh is printed with a water soluble and ultra-violet (UV) light curable ink, a container enclosing the three-dimensional mesh, a membrane coupled to the three-dimensional mesh, and a dye dispensed on top of the membrane, wherein the three-dimensional mesh interacts with the dye when in contact with the dye to provide an indication.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: February 8, 2022
    Assignee: Xerox Corporation
    Inventors: Seemit Praharaj, Michael J. Levy, Paul J. McConville
  • Publication number: 20210387459
    Abstract: A purge cycle is performed with an ink delivery system of an inkjet printer by applying a pressure pulse to a printhead in the printer that is substantially shorter than pressure pulses previously used. A pressure at a predetermined threshold is generated behind a valve and then release to the printhead. The duration of the pressure application is in a range of about 150 milliseconds to about 250 milliseconds. This pressure pulse substantially reduces the amount of ink emitted during the purge. A bidirectional wipe of the printhead face is effective for restoring inkjets in the printhead even though the amount of emitted ink is substantially reduced.
    Type: Application
    Filed: June 10, 2020
    Publication date: December 16, 2021
    Inventors: Seemit Praharaj, Paul J. McConville, Jason M. LeFevre, Michael J. Levy, Thomas J. Wyble
  • 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: 20210187968
    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: Application
    Filed: December 23, 2019
    Publication date: June 24, 2021
    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
  • Publication number: 20210187948
    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: Application
    Filed: December 23, 2019
    Publication date: June 24, 2021
    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: 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
  • Publication number: 20210170766
    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: Application
    Filed: December 4, 2019
    Publication date: June 10, 2021
    Inventors: David A. VanKouwenberg, Seemit Praharaj, Michael J. Levy, Douglas K. Herrmann, Paul McConville, Chu-Heng Liu, Linn C. Hoover, Jason M. Lefevre
  • Publication number: 20210138803
    Abstract: A marker transport system and a method of operating the marker transport system. A group of print bars is located with respect to a marker transport platen and a marker transport belt. A vacuum source and a pneumatic solenoid block are associated with the marker transport platen. The marker transport platen includes airflow sections divided into process-direction slots and cross-section direction slots. The cross-section direction slots are located beneath the print bars and are connected to the vacuum source via the pneumatic solenoid block, which facilitates an individual control of each of the cross-process direction slots. Pneumatic valves are associated with the pneumatic solenoid block, which supplies a flow of vacuum to the cross-process direction vacuum slots. The pneumatic vales can be timed to allow the vacuum to be present when a sheet is present over a corresponding vacuum slot among the process-direction slots and the cross-section direction slots.
    Type: Application
    Filed: November 10, 2019
    Publication date: May 13, 2021
    Inventors: Jason M. Lefevre, Seemit Praharaj, Michael J. Levy, Douglas K. Herrmann, Paul McConville, Chu-Heng Liu, Linn C. Hoover, David A. VanKouwenberg
  • Publication number: 20210138802
    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: Application
    Filed: November 10, 2019
    Publication date: May 13, 2021
    Inventors: Douglas K. Herrmann, Seemit Praharaj, Michael J. Levy, Jason M. Lefevre, Paul McConville, Chu-Heng Liu, Linn C. Hoover, David A. VanKouwenberg
  • Publication number: 20210078814
    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: Application
    Filed: September 13, 2019
    Publication date: March 18, 2021
    Inventors: Douglas K. Herrmann, Seemit Praharaj, Michael J. Levy, Jason M. Lefevre, Paul McConville, Chu-heng Liu, Linn C. Hoover, David A. VanKouwenberg
  • Publication number: 20210060955
    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: Application
    Filed: February 3, 2020
    Publication date: March 4, 2021
    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: 10933641
    Abstract: An inkjet printer is configured with capping stations for storing printheads in the printer during periods of printer inactivity so the viscosity of the ink in the nozzles of the inkjets of the printheads does not increase significantly. Each capping station has a printhead receptacle that encloses a volume, a planar member configured to move between a first position at which the planar member is located within the printhead receptacle and a second position at which the planar member is external of the printhead receptacle, a first actuator operatively connected to the planar member, the first actuator being configured to move the planar member from the first position to the second position, and a controller configured to operate the first actuator to move the planar member from the first position to the second position to mate the planar member with a face of a printhead.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: March 2, 2021
    Assignee: Xerox Corporation
    Inventors: David A. VanKouwenberg, Linn C. Hoover, Michael J. Levy, Jason M. LeFevre, Chu-heng Liu, Paul J. McConville, Douglas K. Herrmann, Seemit Praharaj
  • Patent number: 10894411
    Abstract: A cap is positioned to contact a printhead when the printhead is not ejecting liquid ink. The cap and the printhead create a sealed space adjacent printhead nozzles when contacting each other. A flexible blade is positioned to contact the printhead when the printhead is not in contact with the cap. The flexible blade is adapted to fold over to spread a liquid solution on the nozzles in a first direction, and the flexible blade is adapted to remove excess amounts of the liquid solution from the nozzles in a second direction. A humidifier is connected to the cap and adapted to supply a moisture form of the liquid solution to the sealed space. A moisture sensor is connected to the cap. The humidifier is adapted to vary supply of the moisture to the sealed space based on the amount of moisture detected by the moisture sensor.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: January 19, 2021
    Assignee: Xerox Corporation
    Inventors: Michael J. Levy, Seemit Praharaj, Paul J. McConville, Jason M. LeFevre, Linn C. Hoover, Chu-heng Liu, David A. VanKouwenberg, Douglas K. Herrmann, John T. Newell, Richard A. Campbell, Ali R. Dergham, Glenn D. Batchelor, Robert A. Clark, Senthil Sivaraman