The process of cutting paper from a roll into sheets (called sheeting) takes place on special machines called roll sheeters. It consists of several key stages:
- Mounting and unwinding the roll – The paper roll is placed on an unwind stand. The paper unwinds gradually into the machine. Proper tension is maintained to avoid wrinkles.
- Guiding and decurling the web – The paper passes through guide rollers. A decurling mechanism removes the “roll memory.” This eliminates the curl caused by winding.
- Slitting – Circular slitting knives trim the web edges to the desired width. They can also slice one wide web into several narrower strips.
- Crosscutting – A knife mechanism cuts the moving web crosswise. It usually uses a drum with a rotating knife. This sets the specific sheet length (e.g., A1, B1 format).
- Delivery and stacking – Finished sheets move via conveyor belts to the delivery table. An automatic jogger stacks them perfectly on a pallet. They are ready for sheet-fed printing.