Patent ID: 7775476

Claim:
A rewinding machine for winding a web material onto a core to form rolls, comprising: a frame; a web supply path; along said web supply path, a first motor-driven winding drum supported by said frame and rotating at a peripheral velocity substantially corresponding to a web supply speed, at which said web is supplied along said web supply path, said web being fed in contact with and around said first winding drum; motor-driven core grippers for gripping said core during winding; a second motor-driven winding drum located in opposition to the first winding drum, a space being defined between said first winding drum and said second winding drum, said space having opposite inlet side and outlet side, said web supply path extending through said space from said inlet side to said outlet side; a core advancing path, along which the core is moved and along which the roll of web material wound on the core is increased; said core advancing path extending through said space, and said core entering said space at said inlet side and exiting said space at said outlet side; wherein said motor-driven grippers impart a rotation to the core whilst said roll of web material is in contact with and rotated by said first and second winding drums and said core is gradually moved away from the first and second winding drums while the roll diameter increases.