To avoid skew feeding, documents loaded on the document tray are retained in the horizontal direction by the slide guide. Then, the documents are
separated one sheet each using differences in the coefficient of friction among the separation roller, documents, and separation guide.
After that, the feeder roller feeds the document onto the reading glass, and the Contact sensor reads out image data of the document; then, the delivery
roller delivers it to the delivery tray.
The document feed motor drives the various rollers of the ADF.