Method and device for guiding a web of material
AssigneeTrespaphan GmbH
InventorsDieter Mathieu, Wolfgang Rasp
Life of this patent
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Abstract
The present invention relates to a method for guiding a flat web of material (1) in which the web of material (1) runs in an arrangement of rotating rollers at a web speed vF. The web of material is guided in its peripheral region via a spreader roll (2) which produces a tensile stress in the transverse direction, i.e. crosswise relative to the machine direction of the web of material (1), wherein this tension in the transverse direction is controlled by means of closed-loop control of the circumferential speed vR of the spreader roll (2) and/or by open-loop control of the cant angle α and/or of the wrap angle β between the surface of the spreader roll (3) and the web of material (1) and wherein the circumferential speed vR is greater than the web speed vF.
Claims20
A method for guiding a flat web of material (1) in which the web of material (1) runs in a machine direction in an arrangement of rotating rollers at a web speed vF, comprising the step of:
- guiding the web of material (1) in its peripheral region with a spreader roll (2) which produces a tensile stress in a transverse direction which is crosswise relative to the machine direction of the web of material (1),
- wherein this tensile stress in the transverse direction is controlled by at least one of a closed-loop control of a circumferential speed vR of the spreader roll (2), an open-loop control of a cant angle α of the spreader roll (2) relative to the machine direction, and an open-loop control of a wrap angle β of the web of material (1) on the spreader roll (2), and wherein the circumferential speed vR is greater than the web speed vF.
Dependencies are inferred from the claim text.