Abstract: The invention relates to method for identifying plural relations in a sheet manufacturing process. Sheet properties are deduced from a response in a pseudo-property profile to a cyclic stimulation. A pseudo-property profile is calculated using a phase lag equal to half the stimulation cycle time, with and without stimulation. The properties of the sheet are deduced from the difference between an excited pseudo-property profile and a reference pseudo-property profile.

Abstract: Method for regulating the basis weight of paper or board in a paper or board machine in which the machine stock is comprised of a number of component stocks and the basis weight of the dry paper or board is measured, preferably by on-line basis-weight measurement at the end of the machine. Based on the stock target of the machine stock formed on the basis of basis-weight regulation and the predetermined stock proportions of the component stocks, a metering target is determined for each component stock. Then, based on the consistency of a component stock measured from each feed line of a component stock and on a metering target determined for each component stock, a flow target is determined for each component stock. Finally, the flow of each component stock is regulated based on the flow target determined for each component stock.

Abstract: In a tissue machine, a roll is arranged to press a paper web against a Yankee cylinder. A steam box is arranged in connection with the roll. A steaming area of the steam box is arranged against the paper web substantially above the horizontal center line of the roll.

Abstract: Method and apparatus for controlling moving paper web during manufacture or subsequent processing, wherein a web elongation profile and a moisture profile are measured. The web elongation is governed by at least two CD moisture actuators, which are situated at different stages in the web manufacturing process or subsequent processing. Means for measuring the web elongation profile and the moisture profile are situated after the CD actuators.

Abstract: The invention relates to a method and apparatus for measuring properties of a moving web. A stimulus is directed onto the moving web by an excitation element and the effect of the web on the stimulus is measured with a detection element. At the measuring point the web is supported by a measurement support sheet. The measurement support sheet comprises at least two regions having different but known responsiveness to one or more forms of stimulus or causing different but known transformation to one or more forms of stimulus.