An interfolding
machine (100) having a
modular structure and with variable
cut-off, having a frame (21) comprising a first plate (21a) and a second plate (21b), parallel to each other, interconnected by means of beams (25). Between the plates (21a and 21b) folding rollers (8 and 9), means for moving (10) and an overlap roller (6), are arranged. Each plate (21a, or 21b), has a complementary shape to a respective upper plate (31a, or 31b). The higher plates (31a and 31b) are connected by means of beams (35) among one another. Between the plates (31a and 31b) instead the
cutting roller (16), the transfer roller (5) and the cutter (17) with the blade (3) are arranged. This way, a modular portion (30) is formed removable independently from a main portion (20) of the frame. Alternatively, the removable portion (30) can comprise the only
cutting roller (16) and the cutter (17) with the blade (3). Alternatively, the only transfer roller (5) may be provided. The
advantage of the invention is that the removable portion brings with it gearings, bearings, supports, etc. of the substituted rollers, and it is exchanged with another equivalent but with different
cut-off with a
machine stop that is very short. The removable portion (30) can be slidingly mounted on longitudinal guides (36). This assists its removal from the working position, and provides a change with another removable portion (30) provided with rollers (16, 17 and 5) of
diameter corresponding to the length of the interfolded sheets of the final stack.