Device for the rough weeding of a multilayer sheet comprising a support liner and at least one adhesive film coupled with the liner

A device for the rough weeding of a multilayer sheet comprising a support liner and at least one adhesive film coupled with the liner, the film comprising a plurality of graphic elements peripherally encircled by cuts and a weed among said graphic elements, the device comprising a sheet support plane defining a feeding direction (X), and a seizing head extending above said plane along a transverse direction (Y) crosswise with respect to said feeding direction, support and drive means adapted to drive said seizing head at least according to said feeding direction (X), wherein said seizing head is adapted to emit a pressurized air ejection substantially parallel with and adjacent to said plane with an ejection direction concordant with said feeding direction (X), and comprises seizing means comprising in turn at least one pair of seizing members adapted to seize said weed, whereby a relative motion between the seizing head and the sheet is adapted to detach the weed from the support liner, said air ejection providing for a stabilization and control of the weeding action, the device further comprising cutting means arranged along said transverse direction (Y), flush within said plane and adapted to cut only the supporting liner to realize a sheet flap foldable upwards, to assist the engagement with said seizing head, and folding means associated with said cutting means and adapted to be lifted from the plane in order to fold said flap.