FOLDING, OR INTERFOLDING, UNIT FOR FOLDING, OR INTERFOLDING SHEETS OF PAPER FOR A MACHINE FOR PAPER CONVERTING

摘要

A folding, or interfolding, unit, (100) for folding, or interfolding, a first and a second plurality of sheets of paper (105a, 105b) in a machine for converting paper, comprises a first and a second folding, or interfolding, counter-rotating rolls (1a, 1b) configured to rotate about a respective longitudinal rotational axis (110a, 110b) and providing a plurality of suction holes (11a, 11b, 12a, 12b). A vacuum generation device and a vacuum distribution device (40a, 40b) are, furthermore, provided for selectively putting into pneumatic communication the vacuum generation device with at least a row of the aforementioned suction holes (11a, 11b, 12a, 12b). The folding, or interfolding, unit, (100) comprises, furthermore, a first and a second cutting device (60a, 60b) providing, respectively, at least a first and a second cutting blade (65a,65b) which cooperates with a first and a second plurality of counter-blades (5a, 5b) distributed along the folding, or interfolding rolls (1a, 1b) in order to cut a first and a second web of paper (101a, 101b), in the first and in the second plurality of sheets (105a, 105b).