Patents by Inventor Julie Catherine Hogan

Julie Catherine Hogan 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: 11820139
    Abstract: A print chip includes: an elongate silicon substrate defining nominal leading and trailing longitudinal sides of the print chip; circuitry layers positioned on the silicon substrate; and a MEMS layer positioned on the circuitry layers. The MEMS layer includes a plurality of parallel nozzle rows, each nozzle row having a plurality of inkjet nozzle devices arranged in a main row portion and a dropped row portion offset from the main row portion. The circuitry layers include data latches configured to provide dot data for the inkjet nozzle devices. A first row of data latches is positioned adjacent a leading row of the main row portion, and a second row of data latches is positioned adjacent a trailing row of the dropped row portion.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: November 21, 2023
    Assignee: Memjet Technology Limited
    Inventors: Julie Catherine Hogan, Ronan Palliser, John Sheahan, Brian Brown, Caitriona Forbes, Pat Lehane
  • Patent number: 11813861
    Abstract: A method of printing an image from a printhead module having a plurality of horizontal nozzle rows. Each nozzle row has a main row portion and a corresponding dropped row portion vertically offset from the main row portion. The method includes the steps of: determining a predetermined delay for the dropped row portions based on the offset, a print speed and a print resolution; allocating dot data for image lines to respective nozzle rows based on the print speed and print resolution, sending first dot data for each main row portion and second dot data for each dropped row portion to the printhead module; and firing nozzles from the main row portions and dropped row portion in a predetermined sequence. Each dropped row portion is fired independently of its corresponding main row portion and delayed relative to its corresponding main row portion by the predetermined delay.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: November 14, 2023
    Assignee: Memjet Technology Limited
    Inventors: Julie Catherine Hogan, Ronan Palliser, John Sheahan, Brian Brown, Caitriona Forbes, Pat Lehane
  • Patent number: 11772376
    Abstract: A method of printing an image from a printhead module having a plurality of horizontal ink planes M supplied with a same ink. Each ink plane has a nozzle row and the nozzles rows of all ink planes have vertically aligned nozzles. The method includes the steps of: defining contiguous span groups along each nozzle row, each span group containing N nozzles; allocating dot data for each image line of the image to a predetermined number of nozzles P in each span group of each nozzle row; sending the dot data to the printhead module and firing nozzles sequentially from the ink planes to print the image line. Only one nozzle from each span group in a same nozzle row is fired simultaneously, N is an integer multiple of M, and P is N divided by M.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: October 3, 2023
    Assignee: Memjet Technology Limited
    Inventors: Julie Catherine Hogan, Ronan Palliser, John Sheahan, Brian Brown, Caitriona Forbes, Pat Lehane
  • Publication number: 20220072854
    Abstract: A method of printing an image from a printhead module having a plurality of horizontal nozzle rows. Each nozzle row has a main row portion and a corresponding dropped row portion vertically offset from the main row portion. The method includes the steps of: determining a predetermined delay for the dropped row portions based on the offset, a print speed and a print resolution; allocating dot data for image lines to respective nozzle rows based on the print speed and print resolution, sending first dot data for each main row portion and second dot data for each dropped row portion to the printhead module; and firing nozzles from the main row portions and dropped row portion in a predetermined sequence. Each dropped row portion is fired independently of its corresponding main row portion and delayed relative to its corresponding main row portion by the predetermined delay.
    Type: Application
    Filed: September 7, 2021
    Publication date: March 10, 2022
    Inventors: Julie Catherine HOGAN, Ronan PALLISER, John SHEAHAN, Brian BROWN, Caitriona FORBES, Pat LEHANE
  • Publication number: 20220072852
    Abstract: A print chip includes: an elongate silicon substrate defining nominal leading and trailing longitudinal sides of the print chip; circuitry layers positioned on the silicon substrate; and a MEMS layer positioned on the circuitry layers. The MEMS layer includes a plurality of parallel nozzle rows, each nozzle row having a plurality of inkjet nozzle devices arranged in a main row portion and a dropped row portion offset from the main row portion. The circuitry layers include data latches configured to provide dot data for the inkjet nozzle devices. A first row of data latches is positioned adjacent a leading row of the main row portion, and a second row of data latches is positioned adjacent a trailing row of the dropped row portion.
    Type: Application
    Filed: September 7, 2021
    Publication date: March 10, 2022
    Inventors: Julie Catherine HOGAN, Ronan PALLISER, John SHEAHAN, Brian BROWN, Caitriona FORBES, Pat LEHANE
  • Publication number: 20220072850
    Abstract: A method of printing an image from a printhead module having a plurality of horizontal ink planes M supplied with a same ink. Each ink plane has a nozzle row and the nozzles rows of all ink planes have vertically aligned nozzles. The method includes the steps of: defining contiguous span groups along each nozzle row, each span group containing N nozzles; allocating dot data for each image line of the image to a predetermined number of nozzles P in each span group of each nozzle row; sending the dot data to the printhead module and firing nozzles sequentially from the ink planes to print the image line. Only one nozzle from each span group in a same nozzle row is fired simultaneously, N is an integer multiple of M, and P is N divided by M.
    Type: Application
    Filed: September 7, 2021
    Publication date: March 10, 2022
    Inventors: Julie Catherine HOGAN, Ronan PALLISER, John SHEAHAN, Brian BROWN, Caitriona FORBES, Pat LEHANE
  • Patent number: 8485638
    Abstract: An inkjet printhead includes: a substrate having a drive circuitry layer; a plurality of nozzle assemblies disposed on an upper surface of the substrate and arranged in one or more nozzle rows extending longitudinally along the printhead; a nozzle plate extending across the printhead; and a conductive track disposed on the nozzle plate which extends longitudinally along the printhead and parallel with the nozzle rows. The conductive track is connected to a common reference plane in the drive circuitry layer via a plurality of conductor posts extending between the drive circuitry layer and the conductive track.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: July 16, 2013
    Assignee: Zamtec Ltd
    Inventors: Gregory John McAvoy, Rónán Pádraig Seán O'Reilly, Julie Catherine Hogan
  • Patent number: 8356884
    Abstract: An inkjet printhead integrated circuit (IC) includes: a substrate having a drive circuitry layer; a plurality of nozzle assemblies disposed on an upper surface of the substrate and arranged in one or more nozzle rows extending longitudinally along the printhead IC; a nozzle plate extending across the printhead IC; and a conductive track fused to the nozzle plate which extends longitudinally along the printhead IC and parallel with the nozzle rows. The conductive track is connected to a common reference plane in the drive circuitry layer via a plurality of conductor posts extending between the drive circuitry layer and the conductive track.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: January 22, 2013
    Assignee: Zamtec Ltd
    Inventors: Gregory John McAvoy, Rónán Pádraig Seán O'Reilly, Julie Catherine Hogan