By a News Reporter-Staff News Editor at Journal of Engineering -- A patent by the inventors Westcott, Robert M. (Holley, NY); SanGregory, Jude A. (Spencerport, NY), filed onApril 26, 2011, was published online on November 12, 2013, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.
Patent number 8582183 is assigned to Kodak Alaris Inc.(Rochester, NY).
The following quote was obtained by the news editors from the background information supplied by the inventors: "Sheet fed scanners have become a popular computer peripheral for creating digital images from documents in both the home and the office. With respect to sheet fed scanners, an image forming subsystem, such as a camera, typically a charged couple device (CCD) and a lens in combination with an illumination source, sits in a stationary position and scans an image as a sheet of paper is moved past the camera, through a narrow transport path, by a paper transport mechanism. Individual raster lines are imaged by the camera and then pieced together to create a two-dimensional (2D) image representation of the original document. The camera is basically imaging one sliver of the document many times as the document is moved past the camera. The paper motion supplies one dimension of the document image, while the width is supplied by the camera. The in-paper travel direction and the width of the document are determined by the optics magnification and the dimensions of the CCD within the image forming subsystem. In alternative designs, a CIS or Contact Image Sensor is substituted for the CCD Lens Reduction form of camera or imager. The CIS device utilizes a number of smaller CCD elements chained together to form a full width imager. This eliminates the need for a reduction lens which is replaced by a self-focusing 1 of essentially 1:1 magnification. Both forms of cameras or imagers are commonly applied in sheet fed scanners as well as flat bed scanning equipment. In some cases, the shape of the sheet fed scanners paper path is semi-circular. For example, some scanners have a semi-circular paper path wherein sheets can be fed from a tray on top and exit beneath, or vice versa. In other cases, the paper path is 'straight through.'
"In some cases, the scanner has two cameras, one for imaging the front side of the sheet or document, the other for imaging the rear side of the sheet or document. Scanners of this form are typically referred to as single pass duplex in that they can images both sides of a document with one pass of the document through the paper transport. Sheet fed scanners employing only one imager are generally referred to as Simplex scanners. In some scanners with one imager or camera, the paper path is designed in a way to provide the ability to turn the sheet over thereby allowing for imaging of both sides, but this must be done in a second or reversing pass of the document, with a penalty of increased scan time.
"FIG. 1 shows a typical sheet fed scanner with a C-shaped paper path and two cameras for duplex scanning of documents. To scan a stack of documents, a human operator places a stack of documents 10, face up, on elevator input tray 11 and initiates a scan command through an attached computer (not shown) or a button or control panel (not shown) on the scanner. Drive rollers 16 begin to continuously rotate in direction 103. Paper present sensor 17 determines that documents are in elevator input tray 11 and a motor (not shown) raises the tray to position the top of stack 10 against urging roller 13. A motor and/or clutch (not shown) rotate urging rollers 13 and feed rollers 15 to pull the top document from stack 10 and move it into the continuously rotating transport rollers 16 which transport the document through curved transport path (C-shaped) 14 in direction 110.
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