Center/surface rewinder and winder

A process for unwinding a parent roll into multiple product rolls comprising:

• unwinding a tissue web from a parent roll and conveying the tissue web downstream on a web transport apparatus at a tension, the web transport apparatus having a first side and a second opposite side, wherein a plurality of winding modules are positioned adjacent to the web transport apparatus, each winding module containing a mandrel extending across the web transport apparatus from the first side to the second side, the mandrels being consecutively positioned and fixed along the web transport apparatus and in operative association with a driving device, wherein each of the plurality of winding modules may independently engage and disengage the tissue web moving downstream without having to stop or slow the tissue web as it is conveyed downstream;
• positioning a rotating mandrel adjacent to the transport apparatus for forming a nip between the web transport apparatus and the mandrel, the driving device driving the mandrel at a speed and the mandrel being positioned towards the transport apparatus at a nip pressure;
• conveying the tissue web into the nip formed between the mandrel and the web transport apparatus so as to initiate winding of the web onto the mandrel;
• and
• controlling at least one of the nip pressure, the incoming tension and the torque of the mandrel in order to control a roll bulk of a roll being wound.