Set of blanks, box, method and machine for making a box from said set of blanks

Packaging box (1', 29, 34, 42, 47, 57, 60, 62, 70, 77, 90, 93, 121, 125) of polygonal section, formed from at least two blanks made from a material in the form of sheets of board or corrugated board, namely a first blank (2, 48, 59, 81, 126, 140) comprising a series of at least four principal leaves (4, 85, 86, 87, 86') ending in a fixing tab (15, 15", 61), said principal leaves and said tab being connected together via first fold lines (5) parallel to each other, directly or via secondary leaves, said series of leaves forming a ring of walls for the box and being connected on one side to a first series (6) of flaps by second fold lines (7) perpendicular to said first fold lines, said series of flaps forming the base of said box, and a second blank (3, 24, 33, 38, 38', 44, 49, 53, 63, 73, 79, 92, 111, 127, 141) comprising at least two panels (10, 11, 12, 13;

• 25, 26;
• 39, 40, 41;
• 45, 46, 47;
• 49;
• 55, 56;
• 64, 65, 66, 67, 68;
• 74, 75, 76;
• 94, 96, 97;
• 112, 114, 116, 117, 118, 119) connected together by a third fold line, namely a first panel and one or more second panels, characterized
• in that the first panel is fixed and/or centered on the first blank, the second blank overlapping at least one fold line of the first blank, and
• in that said second panel or at least one of said second panels is fixed to said first blank by means (83, 83', 84, 84', 88, 89) arranged so as to permit relative movement of said second panel or panels with respect to the first blank when the box is being formed, said box being formed by a rolling up of the prejoined blanks around a volume of defined dimensions, the third fold line or lines of the second blank being superimposed on the corresponding fold lines of the first blank.

Machine (150, 170, 160) for constructing a polygonal-section packaging box from at least two blanks made of a material in the form of sheets of board or corrugated board, namely a first blank comprising a series of at least four principal leaves ending in a fixing tab, connected together by first fold lines parallel to each other, said series of leaves forming a ring of walls for the box and being connected on one side to a first series of flaps by second fold lines perpendicular to said first fold lines, said series of flaps forming the base of said box, a second blank comprising at least two panels connected together by a third fold line, namely a first panel and one or more second panels, said second blank forming a reinforcement for said box, characterized in that it comprises

• means (157, 158, 165) for positioning the second blank on the first blank, the third fold line or lines of the second blank being positioned with respect to the first or second fold lines of the first blank so as to permit said blanks to be rolled around said volume of defined dimensions with compensation for the extra thicknesses of the sheets of board,
• means (156, 167) for fixing at least one second panel to the first blank with glue to permit relative movement of said second panel or panels with respect to the first blank, the second blank overlapping at least one fold line of the first blank, and
• means (161) for forming the box by rolling the connected blanks around a volume of defined dimensions, permitting the second panel or panels to slide with respect to the first blank.