Importance

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Abstract

A system to achieve an improved winding structure while winding webs (1, 1', 1' . . . ), especially paper webs, to obtain at least one wound web roll (5, 5', 5' . . . ) on a winding machine, comprises sensors 8A, 9A for determining torque load 8 and rider roll nip load 9, respectively, in order to change the tension remaining in the wound web. The winding machine is of a supporting drum type with at least two supporting drums (2, 3), at least one of these supporting drums preferably has elastic flexible surface (2', 3'). The torque and nip loads 8, 9, respectively, for changing the tension remaining in the wound web roll operate such that the tension of the web (1, 1', 1' . . . ) first decreases at increasing web roll diameter of said at least one web roll (5, 5', 5' . . .) during an initial winding phase, then stays approximately at the same level and, after winding further, decreases further at increasing wound web roll diameter during a final winding phase.

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First Claim