Epson Expression 1680 - Manual (Page 87)

4-18 Options
To remove the reflective document mat, slide it up and out of the
slots on the Transparency Unit. Be sure to store the reflective
document mat in the Transparency Unit pocket when not in use.
c
Caution:
Do not put anything but the reflective document mat into the
Transparency Unit pocket.
Using the Automatic Document Feeder
The Automatic Document Feeder (B813163) allows you to
automatically load multiple-page documents into your scanner.
This document feeder is particularly useful for OCR (optical
character recognition) scanning, or for creating an image
database.