Device and method for controlling the separation of sheets of paper strips in rewinding machines and rewinding machine included with said device

摘要

Device for controlling the separation of the sheets of rolled paper bands in the form of rolls, arranged and acting in a station for the formation of rolls comprising a guide roller (RA) that cooperates with additional means (R4, R5) for the winding of a band (2) of paper in order to form a roll of paper and cooperating with adapted means to form lines of previous incision in the band (2) of paper in order to divide said band (2) into a plurality of separable sheets, in which the device for controlling the separation of the sheets comprises pneumatic separation means (SP) adapted to direct a jet (J) of fluid towards a pre-incision line (p) separating the last sheet (LS) ) of a roll (RO) in formation of the first sheet (FS) of a subsequent roll to be formed, in which said pneumatic separation means (SP) are arranged inside said guide roller (RA), in the that said roller (RA) of The guide has an outer surface (72) with a plurality of through holes (73) that allow the jet (J) of fluid produced by the pneumatic separation means (SP) to be directed towards said pre-incision lines (p), the device being characterized by which it comprises suction means (200, 201) disposed downstream with respect to said separation means (SP) with respect to a direction (K) of rotation of said guide roller (RA), by which said means (200, 201) of suction are arranged inside the same guide roller (RA) in which the pneumatic separation means (SP) are arranged, and by which said suction means (200, 201) cause a suction through said through holes (73).