Olivetti D-COPIA 300MF Operation Manual page 67

Preparation before Use
Ensure that loaded originals do not exceed the level indicated. Exceeding
the maximum level may cause the originals to jam (see the figure below).
Originals with punched holes or perforated lines should be placed in such
a way that the holes or perforations will be scanned last (not first).
OPERATION GUIDE 2-29