Method in winding of a paper web

B - Operations – Transporting – 65 – H

Patent

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B65H 18/08 (2006.01)

Patent

CA 2219489

A method for winding a paper web in which the paper web is wound by a winder or equivalent winding apparatus onto a roll and the running speed of the winder is controlled based on the frequency of rotation of the roll so that when the frequency of rotation of the roll approaches a range of oscillation, i.e., a range of frequency of rotation of the roll in which intensive oscillation occurs, the running speed is lowered quickly so that the frequency of rotation of the roll is reduced to a level lower than the lower frequency of the range of oscillation. Thereafter, the running speed of the winder is increased so that the frequency of rotation of the roll remains substantially constant until, e.g., the running speed of the winder prior to the reduction thereof as the frequency of rotation of the roll approached the range of oscillation is reached.

Méthode d'enroulage d'une bande continue de papier sur un rouleau, au moyen d'un enrouleur ou d'un appareil d'enroulage équivalent. La vitesse de rotation de l'enrouleur dépend de la fréquence de rotation du rouleau, de sorte que lorsque cette fréquence s'approche d'une plage d'oscillation (c.-à-d., une gamme de fréquences de rotation du rouleau à l'intérieur de laquelle survient une oscillation intensive), la vitesse de rotation diminue rapidement pour que la fréquence de rotation du rouleau soit réduite à un niveau inférieur à la fréquence la plus basse de la plage d'oscillation. Par la suite, la vitesse de rotation de l'enrouleur est augmentée afin que la fréquence de rotation du rouleau demeure essentiellement constante jusqu'à ce que, par ex., la vitesse de rotation de l'enrouleur soit atteinte avant la réduction, alors que la fréquence de rotation du rouleau s'approche de la plage d'oscillation.

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