| 摘要 |
A scanning device includes an input tray, an input path, an output path, an output tray, a first scanning head, a second scanning head and a sheet-transporting mechanism. The input tray stores a plurality of documents. The input path is connected to the input tray and the output path, and the output tray is connected to the output path. The first scanning head on the input path scans a backside of each document to output a backside image signal. The second scanning head on the output path scans a front side of each document to output a front side image signal. The sheet-transporting mechanism transports each document from the input tray to the output tray sequentially along the input path and the output path. The sheet-transporting mechanism transports each document in the input path in one direction and in the output path in a reverse direction.
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