Paper web control.

摘要

A method of controlling the properties of a paper web across the feed direction (cross profile) in a paper machine. The cross profile is adjusted in a plurality of setting positions (7) across the web. Proceeding from a measured cross profile and a desired cross profile, an optimum correction in the setting positions (7) is calculated, so that the cross profile is brought into agreement with the desired one. At this calculation the circumstance is utilized, that a disturbance in the stock in a certain setting position results in a corresponding change (response) in the cross profile of the paper web.