Apparatur og fremgangsmåde til foldning af papirkasser

摘要

Apparatus and method for folding flaps onto panels formed in folded box blanks, particularly those constructed from corrugated cardboard. As a blank advances along a paper line (28), a first station (22) engages leading edges of the flaps and forces the flaps into an intermediate plane representing a partial folding operation. Then a second station (23) controls the relative velocities of the flaps along the paper line with respect to the panels to compensate for skew that can occur in other stations. A final station (24) completes the folding operation. The resulting fold is made about an axis, or fold line. If the flap is to be folded about a prestamped score line, the fold and score lines are coextensive. Typically the flaps are folded 180 and the first station produces intermediate folds that are displaced 90 from the panels.