Patent ID: 9662851
Date: 2017-05-30
CPC Classifications: B31B,B65D

Claim:
1. A method for the production of a packing case with a polygonal section from a one-piece blank made of a corrugated cardboard sheet, the one-piece blank comprising a band, the band comprising a series of at least four main rectangular panels terminated by a fixing tongue to form side walls of the case, said series of at least four main rectangular panels and said fixing tongue being connected to one another by fold lines parallel to one another and the band being provided on one side with a first series of flaps connected to said series of at least four main rectangular panels for forming at least partly a bottom of the case, and being provided on an another side with a second series of flaps connected to said series of at least four main rectangular panels for forming a top of the case, the band comprising a pre-cut transverse line over the series of at least four main rectangular panels making it possible to divide the one-piece blank into a first half-blank and a second half-blank, wherein the method comprises the steps of: unstacking the one-piece blank, separating said first half-blank from said second half-blank, placing the first half-blank in a transfer channel, while holding the second half-blank in a plane higher than that of the transfer channel, transferring the first half-blank to a mandrel and applying adhesive to the first half-blank during the transferring to the mandrel, wrapping the first half-blank around the mandrel, resulting in a wrapped first half-blank, lowering the second half-blank to the transfer channel, transferring, via the transfer channel, the second half-blank to the mandrel, and wrapping the second half-blank around the wrapped first half-blank to form the side walls of the case before folding the first and second series of flaps around the mandrel to form at least partly the bottom or the top of the case.