Metso Paper Inc.

Janne Ver&auml;j&auml;nkorva

Teppo Kojo

Esa Aalto

Timo Rautakorpi

Petteri Lannes

Petri Enwald

Seppo Luomi

Markku Kyyts&ouml;nen

Jouni Tulokas

The invention relates to a method in continuous unwinding of a paper web, in which a paper reel ( ) wound on a reeling core ( ) or the like is unwound by rotating the same to guide the paper web ( ) to a further processing stage. The method is characterized in that the shape of the outer surface of the unwound paper reel ( ) is measured with the aim of detecting the defects possibly occurring in the paper reel ( ) the invention also relates to an apparatus for applying the method.

Method and device in continuously operated unwinding of a paper reel

The invention relates to a method and apparatus in a reeling process of a paper web. A paper web (PR) is continuously reeled around a reeling core ( ) via a roll assembly (T). A first press device arrangement ( ) is arranged to move with respect to the frame ( ) of the reel-up and by means of the first press device arrangement ( ) a first nip contact (N ) is maintained to the paper web (PR) that is being formed on the reeling core, and the first press device arrangement ( ) is transferred with respect to the frame ( ) of the reel-up into a nip contact (N ) with a second press device arrangement ( ). According to the invention, the section of the roll assembly (T) before the first press device arrangement ( ) and the first press arrangement ( ) are formed as separate units. The paper web (PR) is guided immediately into nip contact (N ) in the first press device arrangement ( ) via the roll assembly (T) stationary with respect to the frame ( ) of the reel-up. Furthermore, the paper reel ( ) that is being formed and the first press device assembly are transferred as a combination substantially in the travel direction of the paper web (PR) in a position controlled manner.

Method and device in the process of reeling up a paper web

The invention relates to a method for reeling up, in which a paper web or the like is continuously reeled on a reeling core. The formation of the paper reel is controlled at least by means of an actuator ( ) of the reeling core ( ), advantageously by means of a centre-drive, an actuator ( ) of a primary surface drive device ( ) of the paper reel, and a nip load (N ) effective between the outer perimeter of a paper reel ( ) formed on the reeling core ( ) and the outer perimeter of the primary surface drive device ( ) of the paper reel, said nip load being produced by means of an actuator ( ), a so-called nip load device. According to the invention the torque (M ) produced by the actuator ( ) of the primary surface drive device ( ) of the paper reel is selected to be smaller than the sum (&Sgr;M ) of the torque values produced by the other actuators driving the paper reel that is being formed.

Method for reeling up

In the method for controlling the structure of a reel, a continuous paper web (W) is reeled around a reel spool ( ) to form a reel (R), and one or more variables are measured from the web (W). When a particular, predetermined change occurs in the variable, the lateral oscillation of the web is changed, by means of which the web is guided to different locations in the reel (R) in the axial direction of the reel spool ( ). The change can be implemented by starting the oscillation or by changing the oscillation in progress. The change can be implemented on the basis of the changes in the transverse profile of the web (W).

Method and apparatus for controlling the reel structure

The invention relates to an apparatus for continuously reeling a paper web, especially a high-gloss magazine paper web, around a reel spool. The apparatus comprises means for guiding the paper web towards the reel spool, means for winding the paper web around the reel spool to form a paper roll, and means for positioning the paper web on the roll in different axial positions with respect to said reel spool. The means for positioning the paper web on the roll in different axial positions comprises oscillating means provided for an oscillating movement of the reel spool in cross direction of the paper web.

Growing community of inventors

Espoo, Finland

Janne Veräjänkorva

Growing community of inventors

Espoo, Finland

Janne Ver&auml;j&auml;nkorva

Janne Veräjänkorva