Patents by Inventor Jubayer Ahmed

Jubayer Ahmed 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: 5801721
    Abstract: A printing system includes a scanner, a graphics computer, and a printer. The scanner optically scans an image and reduces it to a series of pixels represented in gray scale. After the scanner finishes converting the image into pixels, the graphics computer converts the gray scale representations of each pixel into a pixel conveying uniform density color information. The graphics computer then outputs the uniform density pixels to a print control system of the printer. The print control system receives the uniform density pixels and controls a printhead to print a reproduction of the image on a substrate suspended within the printer. Alternatively, the print control system controls a pair of printheads positioned on opposite sides of the substrate suspended within the printer to print a reproduction of the image on one side of the substrate and a mirror of the image on the opposite side of the substrate such that the images are in registry.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: September 1, 1998
    Assignee: Signtech U.S.A. Ltd.
    Inventors: James Gandy, Jubayer Ahmed, Don Ray Janysek
  • Patent number: 5751308
    Abstract: A substrate guide and tensioning apparatus utilized with a printing system ensures the substrate does not flex or curl during printing to eliminate color mismatch among printed pixels. The printing system includes a scanner, a graphics computer, and a printer. The scanner optically scans an image and reduces it to a series of pixels represented in gray scale. After the scanner finishes converting the image into pixels, the graphics computer converts the gray scale representations of each pixel into a pixel conveying uniform density color information. The graphics computer then outputs the uniform density pixels to a print control system of the printer. The print control system receives the uniform density pixels and controls a printhead to print a reproduction of the image on a substrate suspended within the printer.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: May 12, 1998
    Assignee: Signtech USA., Ltd.
    Inventors: James Gandy, Jubayer Ahmed, Don Ray Janysek