Metso Paper Inc.

Helena Lepp&auml;koski

Pekka Koivukunnas

Timo Torvi

Kari Hasanen

Petteri Venetjoki

The present invention relates to a method for calendering a moving web ( ) of paper or board. The web ( ) is passed to a calender ( ) and calendered therein. At least one quality of the calendered web ( ) is measured at a first measurement point ( ) adapted at a location downstream from the calender ( ). Additionally, at least one quality of the web ( ) entering the calender ( ) is measured at a second measurement point ( ) adapted at a location between the calender ( ) and the preceding section of the line. A control variable ( ) affecting the calendering effect on the calender ( ) is controlled by a feedback control scheme based on the measurement result obtained from said first measurement point ( ) and a control variable ( ) affecting the processability of the web ( ) to be calendered is controlled by a feedback control scheme based on the measurement result obtained from said second measurement point ( ).

Growing community of inventors

Lempäälä, Finland

Helena Leppäkoski

Growing community of inventors

Lempäälä, Finland

Helena Lepp&auml;koski

Helena Leppäkoski