Apparatus and method for producing logs of sheet material

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 18/20 (2006.01) B65H 19/22 (2006.01) B65H 19/30 (2006.01)

Patent

CA 2482828

The present invention provides an apparatus and a method for forming and ejecting logs (22) from the winding cradle of a surface-driven rewinder comprising a winding cradle formed by a plurality of parallel rollers (12, 14, 16) having gaps there between and wherein at least one of the rollers is moveable relative to the others thereby forming first and second gaps of variable length. The rewinder further includes a first driver (26) that is operatively connected to and controls the rotational speed of at least one of the rollers (14, 16), and a second driver t (30) hat is operatively connected to and controls the rotational speed of at least one of the rollers (12), and wherein the rollers (14, 16) driven by the first driver (26) are different than the rollers (12) driven by the second driver (30). The rotational speed and/or direction of one or more of the rollers (12, 14, 16) can be varied whereby a log (22) of sheet material formed within the winding cradle can be ejected through either the first or second gap.

L'invention concerne un appareil et un procédé de formation et d'éjection de bobines (22) du support d'enroulement d'un enrouleur à entraînement tangentiel comprenant un support d'enroulement formé de plusieurs rouleaux en parallèle (12, 14, 16) espacés entre eux et dans lequel au moins un des rouleaux est mobile par rapport aux autres formant ainsi des premier et second espacements de longueur variable. L'enrouleur comprend aussi un premier dispositif d'entraînement (26) qui lui est connecté et qui commande la vitesse de rotation d'au moins un des rouleaux (14, 16), et un second dispositif d'entraînement (30) qui lui est connecté et qui commande la vitesse de rotation d'au moins un des rouleaux (12), les rouleaux (14, 16) entraînés par le premier dispositif d'entraînement (26) étant différents des rouleaux (12) entraînés par le second dispositif d'entraînement (30). La vitesse de rotation et/ou la direction d'un ou de plusieurs rouleaux (12, 14, 16) peut être variée grâce à quoi une bobine (22) de matériau en feuille formée sur le support d'enroulement peut être éjectée à travers l'un des deux espacements.

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