How does sheetfed scanner work?
A sheetfed scanner moves individual sheets of paper/document past a fixed or stationary scan assembly at one fixed point, rather than moving the scan assembly past a stationary paper or object. The paper/document is usually fed using an Automatic Document Feeder (ADF) which pulls one sheet of paper through at a time at a controlled speed past the stationary scanner assembly so the image is consistant with the original image. Here is a website that may also help: http://www.ehow.com/about_5329965_sheet-… Best of luck.
