Apparatus and method for on-line control of the fiber orientation cross profile

An apparatus for on-line control of the fiber orientation cross profile of a moving paper or board web in a a headbox having a headbox nozzle comprehensive paper machine comprises at least one the fiber orientation profile online regulating closed-loop control, in the as an adjusting means comprises means for feeding and / or drawing off of a respective predetermined volume flow is incorporated into or out of the two lateral edge areas of the headbox nozzle of the headbox. There is also provided a corresponding method for online control of the fiber orientation transverse profile.