Arrangement and web tension control unit for web delivery
AssigneeSCA Hygiene Products AB
InventorsHarald E B.o slashed.rresen, Terje Nyren
Life of this patent
Estimating the term…
Abstract
An arrangement for delivering a web of material from a storage reel to a process line for manufacturing absorbent disposable articles. The arrangement includes a web tension control unit for holding a predetermined value of tension in the web of material passing through the control unit for delivery to the process line. The control unit is placed in immediate proximity to the process line.
Claims14
A unit for controlling the tension of an outgoing web of material passing through the unit and being delivered to a process line for manufacturing absorbent disposable articles, said unit comprising:
- a spring biased dancing arm pivotable about a fixed axle and intended to support a web loop in its free end,
- wherein a spring force on the dancing arm acts in a direction opposite to the direction of the gravitational force acting on said arm;
- a position indicator for continuously sensing a rotational position of the dancing arm and delivering a position signal corresponding to the rotational position;
- a pair of feed rolls mounted at an upstream end of the unit, the web passing through the feed rolls when the unit is in operation;
- and
- control means for receiving the position signal from the position indicator and adjusting a rotational speed of the pair of feed rolls so that a predetermined tension is maintained in the web going out from the unit.
A unit for controlling the tension of an outgoing web of material passing through the unit and being delivered to a process line for manufacturing absorbent disposable articles, said unit comprising:
- a spring biased dancing arm pivotable about a fixed axle and intended to support a web loop in its free end,
- wherein a spring force on the dancing arm acts in a direction opposite to the direction of the gravitational force acting on said arm;
- a position indicator for continuously sensing multiple rotational positions of the dancing arm throughout a range of pivotable movement of the dancing arm and delivering a position signal corresponding to the sensed rotational position;
- a pair of feed rolls mounted at an upstream end of the unit, the web passing through the feed rolls when the unit is in operation;
- and
- control means for receiving the position signal from the position indicator and adjusting a rotational speed of the pair of feed rolls so that a predetermined tension is maintained in the web going out from the unit.
Dependencies are inferred from the claim text.