Guiding device

A guiding device for guiding a sheet of packaging material in a packaging machine for producing sealed packages, the guiding device comprising:

• a plurality of folding rollers defining a passage for the sheet of packaging material, the passage having a longitudinal axis, wherein the plurality of folding rollers are configured to cause a first longitudinal edge of the sheet of packaging material to superimpose to a second longitudinal edge of the sheet of packaging material, opposite the first longitudinal edge, wherein the first longitudinal edge and the second longitudinal edge define an overlapping area having an extension,
• wherein the plurality of folding rollers include:
• a group of first folding rollers configured to rotate around first rotation axes arranged in a common first plane, and
• at least one second folding roller configured to rotate around a second rotation axis arranged in a second plane, different from the first plane, and
• a driving arrangement configured to move the at least one second folding roller towards and away from the longitudinal axis of the passage so as to control the extension of the overlapping area,
• wherein the first folding rollers define a C-shaped arrangement, a gap being defined between opposite ends of the C-shaped arrangement, the at least one second folding roller being arranged at the gap of the C-shaped arrangement.