FLATBED SCANNER
A Flatbed Scanner works in a manner similar to a copy machine except it creates a file of document in memory instead of a paper copy.
A flatbed is a type of scanner or copier that uses a flat, glass surface for scanning documents or other objects. Most flatbed scanners have an adjustable lid that can be raised to allow magazines, books, and other thick objects to be scanned. This is a significant benefit over sheet-fed scanners or copiers sometimes referred to as (automatic document feeders), which can only accept paper documents.
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http://techterms.com/definition/flatbed
A Flatbed Scanner works in a manner similar to a copy machine except it creates a file of document in memory instead of a paper copy.
A flatbed is a type of scanner or copier that uses a flat, glass surface for scanning documents or other objects. Most flatbed scanners have an adjustable lid that can be raised to allow magazines, books, and other thick objects to be scanned. This is a significant benefit over sheet-fed scanners or copiers sometimes referred to as (automatic document feeders), which can only accept paper documents.
Courtesy : http://www.slideshare.net/askme/chapter-11-280487?related=2
http://techterms.com/definition/flatbed