High speed interfolder

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 45/24 (2006.01) B65H 45/16 (2006.01) B65H 45/28 (2006.01)

Patent

CA 2624698

An interfolding apparatus including a knife roll rotatable about an axis and operable to cut successive sheets from a stream of web material issuing from a source in a downstream direction. A folding roll is positioned downstream of the knife roll and is rotatable in a first direction at a first roll speed. An additional roll is disposed adjacent to the folding roll and is rotatable about an axis in a second direction at a second roll speed. The additional roll is operable to receive the successive sheets and release the successive sheets in the downstream direction toward the folding roll. The folding roll and the additional roll define a nip therebetween, the successive sheets passing through the nip. The first roll speed of the folding roll is different from the second roll speed of the additional roll, the difference in speed between the folding roll and the additional roll operable to overlap adjacent portions of the successive sheets onto the folding roll.

La présente invention concerne un dispositif plieur comprenant un rouleau à couteau pouvant tourner autour d'un axe et permettant de couper des feuilles successives d'un flux de matériau en bande en provenance d'une source en aval. Un rouleau plieur en aval du rouleau à couteau peut tourner dans un premier sens à une première vitesse. Un rouleau additionnel est placé à côté du rouleau plieur et peut tourner autour d'un axe dans un deuxième sens à une deuxième vitesse. Ce rouleau additionnel permet de recevoir des feuilles successives et de libérer ces feuilles successives en aval en direction du rouleau plieur. Ce rouleau plieur et ce rouleau additionnel définissent un espace entre eux, des feuilles successives passant à travers cet espace. La première vitesse de rouleau du rouleau plieur est différente de la deuxième vitesse du rouleau additionnel, cette différence de vitesse entre le rouleau plieur et le rouleau additionnel permettant de faire chevaucher des parties contiguës de feuilles successives sur le rouleau plieur.

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