Method for folding a corrugated cardboard blank intended to form a folded box

A folding-gluing unit for manufacturing a folded box made of corrugated cardboard, the folding-gluing unit comprising:

• at least one driving device adapted to driving a blank of corrugated cardboard provided with at least one longitudinal crease,
• at least one conveyor adapted to move the blank of corrugated cardboard in a longitudinal direction from the at least one driving device,
• at least one liquid application arrangement adapted to apply a liquid to the at least one longitudinal crease, the application arrangement comprising a liquid-ejection nozzle provided with a liquid outlet, and at least one aspiration device adapted to generate a negative pressure inside an aspiration compartment of the at least one liquid application arrangement and adapted to aspirate liquid, and
• at least one folding device adapted to fold the blank of corrugated cardboard around the at least one longitudinal crease, wherein
• the liquid-ejection nozzle and the aspiration device are on a same side of the blank.

A folding-gluing unit for manufacturing a folded box made of corrugated cardboard, the folding-gluing unit comprising:

• at least one driving device adapted to drive a blank of corrugated cardboard provided with at least one longitudinal crease,
• at least one conveyor adapted to move the blank of corrugated cardboard in a longitudinal direction from the at least one driving device,
• at least one liquid applicator adapted to apply a liquid to the at least one longitudinal crease, the liquid applicator comprising:
• a housing comprising a guide plate with a liquid outlet;
• a liquid-ejection nozzle configured to eject liquid through the liquid outlet;
• and,
• an aspiration device adapted to generate a negative pressure inside an aspiration compartment of the at least one liquid applicator and adapted to aspirate liquid from between the guide plate and the blank, and
• a folding device adapted to fold the blank of corrugated cardboard around the at least one longitudinal crease, wherein
• the liquid-ejection nozzle ejects liquid at a bottom side of the blank.