Patent ID: 8839836

Claim:
A device for applying at spaced positions (P 1 , D) over a moving web of material (S) superposed strips of a first material (A) and a second material (B), the device comprising: a first cutting unit including a first knife to be fed with said first material (A) and a first anvil roll to co-operate with said first knife in cutting said strips of said first material; a second cutting unit including a second knife to be fed with said second material (B) and a second anvil roll to co-operate with said second knife in cutting said strips of said second material to be applied superposed with strips of said first material (A) at spaced positions (P 1 , D) over said moving web of material (S), wherein said first anvil roll and said second anvil roll are arranged facing each other, movable of concordant motions relative to one another, and configured for passing said strips of said first material (A) onto said second anvil roll by superposing them onto said strips of said second material (B) carried with a capability of sliding by said second anvil roll such that the strips of the first material (A) and the strips of the second material (B) can slip on the first and second anvil rolls, thus varying a distance, at a cutting step, between the strips of the first material (A) and the strips of the second material (B).