Web tension control system for a winding structure

A process for winding a traveling, tensioned paper web utilizing a winding apparatus having at least two driven, front and back, support drums having parallel axes of rotation, and defining a winding bed between them, and a core for receiving the on-coming traveling paper web to be wound into a wound web roll thereon, as the core is disposed in the winding bed supported by the support drums, and a rider roll for engaging the web roll along a nip line of contact therewith as the web roll is being wound, comprising the steps:

• 1) decreasing the wound-in tension in the web roll being wound in an initial phase of the wound web roll winding process by selectively distributing the torque load between the driven support drums;
• 2) further decreasing the wound-in tension in the web roll being wound in a subsequent intermediate phase of the wound web roll winding process by further selectively distributing the torque load between the driven support drums, the rate of wound-in tension of the web in the wound web roll in the intermediate phase decreases at a rate which is less than the rate of wound-in tension in the initial phase;
• 3) still further decreasing the wound-in tension in the web roll being wound in a still further final phase of the wound web roll winding process by further selectively distributing the torque load between the driven support drums, the rate of wound-in tension of the web roll in the final phase is greater than the rate of wound-in tension in the intermediate phase;
• 4) coordinating the rider roll nip with the rates of wound-in tension during the initial, intermediate and final phases.