Abstract: A folding and stacking machine of a web of paper has first and second feed lines. The machine also has a folding section with folding rollers having a linear folding speed, VP. The folding rollers are adapted to receive a plurality of sheets of length L that can overlap each other for a fraction Y of their length L and to fold them into a plurality of panels P. The machine also has rollers adapted to feed at the folding speed VP the series of cut sheets but not yet folded towards the folding rollers. The rollers are located at the confluence of the two sheet feeding lines. Upstream of the first and feed lines a single cutting section is provided to cut a web of paper that proceeds along a direction of movement at a speed V(1).

Abstract: Folding and stacking machine (100) of a web of paper, or similar products comprising a first sheet feeding line (201) and a second sheet feeding line (202). The machine (100) comprises, furthermore, a folding section (200) having a couple of folding rollers (7, 8) that work at a linear folding speed VP and are adapted to receive a plurality of sheets (11) of length L that are overlapped for a fraction Y of their length L and to fold them into a plurality of panels (P). The first and the second sheet feeding lines (201, 202) provide respective cutting sections of the sheets starting from webs of paper (10, 10?). These proceed respectively at a speed V1 and V2 with respect to the folding speed VP, where a first speed (V1) has a ratio X1 with respect to the folding speed VP, V2 and a second has speed V2 second h a ratio X2 with respect to the folding speed VP. The first and the second sheet feeding lines (201, 202) can be operated selectively and independently, i.e.

Abstract: A method for separating two consecutive interfolded sheets, during the production of packages of paper products, even if there is present at least one tear-off line or “tab bond”. The sheets are fed in an interfolded way from interfolding rollers on a table by means of suitable folding arms. At a predetermined height of the stack a first plurality of separators, arranged along the length of the stack and at opposite sides with respect to it, are inserted in the same stack. This introduction divides the formed stack from the growing stack. Between the separators and the table a side of a sheet stretching board is introduced. The formed stack is then arranged between the table and the sheet stretching board. These are lowered vertically and move away from each other autonomously from the separators up to cause the disengagement of the growing stack from the formed stack.