Box made of a cardboard sheet material, blank or blank assembly, and method and device for forming such a box

A device for forming a box from at least one blank of corrugated cardboard sheet, comprising a belt which comprises at least four main rectangular panels and which is provided with at least one side having a series of flaps which are capable of at least partially forming the base of the box,

• with at least two main panels being connected to a main central panel by intermediate panels forming cut corners which do not have flaps, each cut corner being formed by at least two rectangular portions of cut face which are connected to each other by folding lines, the device comprising an assembly for picking the blank,
• characterized in that, the portions of cut face having a width between 3 mm and 20 mm and at least two opposing main panels having different widths, the device comprises means for gluing the blank during the transfer to a mandrel,
• the mandrel comprising at least two edges which comprise rounded angles capable of cooperating with the cut corners,
• means for wrapping the blank around the mandrel in order to form the belt of the box and pressing means which are configured in order to fold the cut corners on the rounded edges and the flaps around the mandrel in order to form the base of the box by adhesive bonding.

A method for forming a box from at least one blank of corrugated cardboard sheet, comprising a belt which comprises at least four main rectangular panels and which is provided with at least one side having a series of flaps which are capable of at least partially forming the base of the box,

• characterized in that,
• with at least two main panels being connected to a main central panel by intermediate panels forming cut corners which do not have flaps, each cut corner being formed by at least two intermediate panels which form rectangular portions of cut face which are connected to each other by folding lines, characterized in that, the portions of cut face having a width between 3 mm and 20 mm, and at least two opposing main panels having different widths,
• after the blank has been picked,
• the blank is glued during the transfer towards a mandrel,
• the mandrel comprising at least two edges which comprise rounded angles which are capable of cooperating with the cut corners,
• the blank is wrapped around the mandrel in order to form the belt of the box and
• the intermediate panels are pressed on the rounded edges and the flaps are pressed around the mandrel in order to form the cut corners and the base of the box.