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CCD-base bar code scanner

  • US 5,984,186 A
  • Filed: 10/29/1997
  • Issued: 11/16/1999
  • Est. Priority Date: 10/29/1997
  • Status: Expired due to Term
First Claim
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1. A bar code scanning system, comprising:

  • a first conveyor for moving objects from a first location to a second location;

    a second conveyor for receiving the objects from the first conveyor and for moving the objects to a third location;

    a light emitting device positioned in a gap underneath a top surface of the first and second conveyors, the light emitting device configured to shine light onto bar code labels on a bottom side of objects as the objects traverse from the first conveyor to the second conveyor;

    a light receiving device positioned in the gap, the light receiving device configured to receive reflected light from the bottom side of the objects due to the light being shined on the objects by the light emitting device; and

    a window-like unit disposed entirely within the gap, the window-like unit having a top surface disposed along a same plane as the top surfaces of the first and second conveyors,wherein the top surface of the window-like unit provides a substantially continuous surface with the top surfaces of the first and second conveyors as the objects traverse from the first location to the third location,wherein the window-like unit provides a magnification to the light output by the light emitting device and the received light directed to the light receiving device.

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