Method to control or regulate the basis weight of a paper or cardboard web
AssigneeVoith Sulzer Papiermaschinen GmbH
InventorsWolfgang Ruf, Hans Loser, Klaus Lehleiter
Life of this patent
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Abstract
Method for regulating a basis weight of a paper or cardboard web in the manufacturing process. The method includes determining a basis weight at an end of the manufacturing process, calculating a deviation of the determined basis weight from a predetermined target value, adjusting a concentration of a material suspension supplied to a headbox via a first control loop such that the calculated deviation is corrected, one of directly and indirectly measuring a basis weight of a resulting web in a region upstream, with regard to a web travel direction, a drying section, and supplying a signal related to the measured basis weight to a second control loop.
Claims7
A method for at least one of controlling and regulating a basis weight of a paper or cardboard web during the manufacturing process comprising:
- determining a basis weight at an end of the manufacturing process;
- calculating a deviation of the determined basis weight from a predetermined target value;
- adjusting a concentration of a material suspension supplied to a headbox via a first control loop, whereby the calculated deviation is corrected;
- one of directly and indirectly measuring a basis weight of a resulting web in a region upstream, with regard to a web travel direction, a drying section;
- and
- supplying a signal related to the measured basis weight to a second control loop.
Dependencies are inferred from the claim text.