Patent ID: 9187204
Filing Date: 2015-11-17
Classification: B31B,B65D

Abstract:
1. A packaging box of polygonal section formed from at least two blanks of uncorrugated or corrugated cardboard sheet material, the at least two blanks comprising: a first blank comprising a series of at least four main flaps terminated by a fixing tab, linked to each other by first fold lines parallel to each other, said series of at least four main flaps comprising two opposite flap(s), each having an opening arranged to authorize access for a user to the inside of the box, said series of at least four main flaps forming the external walls of the packaging box and being linked on one side to a series of flaps by second fold lines perpendicular to said first fold lines, said series of flaps forming the top of said packaging box, and a second blank comprising a first central panel and four lateral second panels connected to said first central panel by third fold lines and connected together via flaps by fourth fold lines to form an external bottom tray for said packaging box, wherein the first and second blanks are configured to form the packaging box by winding first and second blanks simultaneously around a first mandrel, the fourth fold lines being in contact and stretched on their whole length against and along the first fold lines by edges of said first mandrel with which they are in contact, so that the corner of the walls of said box and the corners of said bottom tray are formed by compression on each other, wherein two panels are configured to be placed flat on opposite sides of a second mandrel, wherein said second mandrel is configured to be lowered inside the packaging box, until it stops at the bottom, with said two panels parallel and in front of the two opposite main flaps of said first blank adjacent to said flaps having an opening, and wherein the second mandrel is configured to be withdrawn upwards so as to obtain the packaging box with internal reinforcement on opposite walls formed by said flaps adjacent to said flaps having the opening.