Konica Minolta PS5000C Operator's Manual page 53

Note for all cases
Do not place the original askew.
Do not place the book with its top edge beyond the stopper.
Be careful to avoid the condition shown in the figure below if pressing the original
from the bottom.
When the original is spread open, be careful not to produce gaps between pages.
Press both pages and then pull them apart.
Original
原稿
Stopper
ストッパー
Spread
すきま
Chapter 4 Operation
4-5