Canon IMAGEFORMULA CR-190I Instructions Manual page 54

Open the Feed Supporter to the left.
Feed Supporter
Pinch the Separation Roller at the rim and the fixing lever, and
then remove it with pressing the Separation OFF Mode
Button.
54
If the Separation Roller is not removed easily because of the fixing lever
position, turn the Pickup Roller in anticlockwise direction by hand.
Fixing Lever
NOTE
Pinch the Feed Roller at the rim and the fixing lever, and then
remove it.
Fixing Lever