The roll-up conveyer collects the broke and empties it into the pulper at a convenient time. Mainly used on machines producing light grades.
The conveyer belt is returned to collect position after discharging the broke.
To clean up under a paper machine is an unpleasant and risky job because of the heat, moisture and the risk that a roll journal can break and fall down. Also consider the risk of fire and how dirty the paper becomes after it has been handled by manual system.