So I posted a question regarding nip and torque and I'm starting to realize that I need to know more about the mechanics of a nip roller to fully understand them. Here a pic I already posted just to give you a visual http://i.imgur.com/ReGYoVm.png Are nips meant to completely isolate tension zones? How does the force applied to the nip rollers affect torque? What is the purpose of apply more force between nip rolls? Does increased force mean less slippage of web between nip rollers? I've tried google, but I can't seem to find a good document talking about the physics of a driven nip roller as well as the applications of them. Any help?