Patent ID: 7172151
Filing Date: 2007-02-06
Classification: B65H

Abstract:
1. A rewinding machine to form logs of wound web material comprising: a first winding roller; a second winding roller; a nip defined between said first winding roller and said second winding roller, through which web material is fed; a surface, extending upstream of said nip in relation to a direction of feed of the web material and defining, with the first winding roller, a channel into which winding cores are fed, said channel having an inlet and an outlet; a core feeder to feed said winding cores towards said channel; a pinch member to pinch said web material between said pinch member and said first winding roller, wherein said pinch member is arranged upstream of said channel and arranged to periodically pinch said web material upstream of said channel, said pinch member having a speed lower than a peripheral speed of said first winding roller when pinching the web material; said first winding roller having suction openings in a cylindrical surface thereof; and a suction box is provided inside said first winding roller, arranged to retain a leading edge of said web material by suction through said suction openings and to transfer the leading edge to a new core introduced into said channel by said core feeder.