Method and unit for flexing a flat blank for producing a rigid package

摘要

A method and unit (10) for flexing a flat blank having preformed fold lines (8'); the flat blank (1) is fed by a seat (12) on a conveyor (11) along a path (P1) through a flexing station (13), where a rigid folding body (18) is rolled over the seat (12) to fold the blank (1) against two fixed folding spindles (15) of the seat (12) and about the preformed fold lines (8'); and, on leaving the flexing station (13), the blank (1) is allowed to spring back to its flat shape.