Two winder drums make up the VariFlex roll bed. At the beginning of the winding process, the nip pressure required for optimal winding tightness is built up by a rider roll. With increasing diameter, the growing dead weight of the paper rolls takes over this function.
Newly developed elastic covers for the winder drums such as ElaGrip™ and ElaCare™ are used for the constantly increasing line loads starting at a certain paper roll weight. They substantially extend the paper qualities and paper roll diameters of the winding system.
This system is used for winding in a wide range of grades. It is also used as a rewinder for quality assurance or elimination of problem spots in the finished roll.