Aggregat för att reglera utgående spänning i en materialbana

摘要

The present invention relates to a unit for controlling the tension of an outgoing web of material (1) passing through the unit and being delivered to a process line (16) for manufacturing absorbent disposable articles, wherein the unit includes a pretensioned or spring-biassed dancing arm (2) which is pivotable about a fixed axle (3) and which is intende to support a web loop in its free end. According to the invention the pretension force in the dancing arm (29 acts in a direction opposite to the direction of the gravitational force acting on said arm, and the biassing force or pretension force is generated by a spring (19) whose one end is is pivotally attached to a lever arm (11) which projects out from the dancing arm (2) at the end thereof connected to the pivot axle (3).