Patent ID: 7293736
Filing Date: 2007-11-13
Classification: B65H

Abstract:
1. A rewinding machine for winding web material onto a core to form rolls, comprising: supply means for supplying the web material at a predefined supply speed; a first winding drum rotating with a peripheral velocity substantially corresponding to the supply speed and having a guide for the web material; means for gripping the ends of the core during winding; means for moving the core along a path in which the roll of web material wound on the core is increased; means for rotating the core in order to wind the web material onto the core to form a roll; a second winding drum located in opposition to the first winding drum, the path extending through a space defined between the first and second winding drums; means for influencing the roll to bear against and remain in contact with the two winding drums as the core moves along the path extending through a space defined between the first winding drum and the second winding drum; and means for pulling the core axially during winding of the web material, said means for pulling the core axially comprising opposed carriages facing the ends of the core and slidable on guides arranged transverse to the working path; wherein said means for gripping comprises a pin and said means for rotating the core comprises a motor for rotating the pin such that said means for gripping directly imparts a rotation to the core, said means for rotating the core being controllable to achieve a peripheral velocity of the roll being formed substantially corresponding to, less than, or greater than the supply speed of the web material.