Method and apparatus in unwinding

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 19/18 (2006.01)

Patent

CA 2320749

In the method in unwinding, paper web (W) is discharged from a reel (R1) that is becoming empty and the paper web of a new full reel (R2) is spliced at the discharge speed to the paper web discharged from the reel that is becoming empty. The terminal end point (L) of the web of the reel (R1) that is becoming empty is stored as information indicating its position in the longitudinal direction of the web in a readable memory (M) corresponding to the reel. During the discharge the distance travelled by the web is determined and compared to the memory, and when there is a predetermined length of web to the terminal end point (L) remaining on the reel (R1) that is becoming empty, a splicing command is given, whereafter the leading end of the paper web of a new full reel (R2) is spliced to the paper web (W) being discharged.

L'invention concerne un procédé de déroulement consistant à décharger la bande de papier (W) d'une bobine (R1) qui se vide et à joindre la bande de papier de la nouvelle bobine pleine (R2) à la vitesse de décharge avec la bande de papier déchargée de la bobine qui se vide. Le point d'extrémité (L) de la bande de la bobine (R1) qui se vide est mémorisé sous forme d'information indiquant sa position dans le sens de la longueur de la bande dans une mémoire lisible (M) correspondant à la bobine. En cours de décharge, la distance parcourue par la bande est déterminée et comparée à la mémoire et lorsqu'une certaine longueur déterminée de la bande reste au point d'extrémité (L) sur la bobine (R1) qui se vide, une commande d'assemblage est lancée pour joindre la bande de papier (W) en cours de décharge avec l'extrémité menante de la bande de papier de la nouvelle bobine pleine (R2).

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