Patent ID: 8464975
Filing Date: 2013-06-18
Classification: B65H

Abstract:
1. An unwinding device ( 10 ) for unwinding rolls ( 12 , 14 ) of one-ply or two-ply web-like material ( 24 ), the device ( 10 ) comprising: a support group for sustaining a first roll ( 12 ) and a second roll ( 14 ), said support group being composed of a support pin ( 16 ) for each roll ( 12 , 14 ), said support pins ( 16 ) being bound on two opposite sides of a vertical column ( 18 ) made integral with the base ( 20 ) of said unwinding device ( 10 ); an unwinding mechanism ( 22 ) for each of said first roll ( 12 ) and second roll ( 14 ), adapted to unwind said web-like material ( 24 ) from said first roll ( 12 ) and second roll ( 14 ); said unwinding device also comprising deflection means ( 28 ) for deflecting said one-ply or two-ply web-like material ( 24 ), said deflection means being placed downstream of said first roll ( 12 ) and second roll ( 14 ), in order to deflect said web-like material ( 24 ) coming from said first roll ( 12 ) and second roll ( 14 ) and send it towards a joining mechanism ( 26 ) adapted to join together specific portions of said web-like material ( 24 ) respectively coming from said first roll ( 12 ) and second roll ( 14 ), said joining mechanism ( 26 ) being provided with at least one joining pad ( 32 , 32 ′) adapted to retain said web-like material ( 24 ) by means of one or more suction systems ( 38 , 38 ′), characterised in that a first of said support pins ( 16 ) is bound to said vertical column ( 18 ) at a height (H 1 ), measured with respect to said base ( 20 ), that is different from the height (H 2 ), measured with respect to said base ( 20 ), of the second of said support pins ( 16 ) bound on the opposite side of said vertical column ( 18 ).