Interfolder with pre-forming transfer roll

B - Operations – Transporting – 31 – F

Patent

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Details

B31F 1/10 (2006.01)

Patent

CA 2624701

An interfolding apparatus including a knife roll, a first interfolding roll, a second interfolding roll, and a transfer roll. The knife roll cuts sheets from a stream of web material issuing from a source in a downstream direction. The first interfolding roll is positioned downstream of the knife roll and receives the sheets. The first interfolding roll rotates in a first direction and the second interfolding roll rotates in a second direction. The first and second interfolding rolls interfold the sheets with additional sheets received by the second interfolding roll. A transfer roll is positioned between the knife roll and the first interfolding roll. The transfer roll has a non- uniform surface configuration and rotates in the second direction and receives the sheets from the knife roll, forms a bend in each of the sheets, and transfers the formed sheets to the first interfolding roll.

Un dispositif plieur comprend un rouleau à couteau, un premier rouleau plieur, un deuxième rouleau plieur et un rouleau de transfert. Le rouleau à couteau coupe des feuilles d'un flux de matériau en bande en provenance d'une source en aval. Le premier rouleau plieur est placé en aval du rouleau à couteau et reçoit les feuilles. Le premier rouleau plieur tourne dans un premier sens et le deuxième rouleau plieur tourne dans un deuxième sens. Le premier et le deuxième rouleau plieur plient les feuilles avec des feuilles additionnelles reçues par le deuxième rouleau plieur. Un rouleau de transfert est placé entre le rouleau à couteau et le premier rouleau plieur. Ce rouleaux de transfert possèdent une configuration de surface non uniforme, tourne dans le deuxième sens et reçoit les feuilles en provenance du rouleau à couteau, forme une courbure dans chacune des feuilles et transfère les feuilles ainsi formées vers le premier rouleau plieur.

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