The laminator relies on the weight of roller itself to do laminationg,no need any additional pressure. If additional pressure is required, we need to increase the cylinder stroke by adjusting the two screws up and down as shown in the illustration.( Notice, it must adjust at both ends of the laminator, not just one end.) as the picture showing:
Ajust Roller Balance(Pneumatic)
Open the right case
1.Ajust middle screw 2.Confirm spring is loose
3.Check if roller is balance of both sides.