Adjusting your tension is good advice. The other is making sure when you load the roll both the backing and the lam make sure they are both on there snug. If not when you clamp it down and one or the other is loose it will cause the wrinkles and creases.
Snug meaning flat from one side to the other up against the rollers. If when you clamp it down you notice it's a little loose on one side or the other then as it feeds through it becomes bunched up.
Also, make sure when you are threading the laminator that the backing
paper is well aligned with the laminate. And when pressing the backing
paper to the laminate make sure it is smooth and flat with no wrinkles or ridges before you start to feed it between the rollers to get it started.
That sounds longwinded but if you use a Royal Sovereign it should make sense to you.