Method for forming a corner join at a corner of a box, method for making a solid board blank permeable to air, box obtained using one or both methods, assembly of a box and filling, the use of a box and a box blank

A box comprising:

• a base panel (2);
• a first side wall panel (6) joined to said base panel via a first panel fold line (5);
• a second side wall panel (4) joined to said base panel via a second panel fold line (3);
• and
• a joining flap (15) joined to the first side wall panel via a joining flap fold line (7),
• wherein the joining flap (15) is the first flap section of a corner flap (8) which comprises at least three flap sections (15, 16, 17) joined to one another via fold lines running parallel to the joining flap fold line (7), and one of the flap sections (17), which is located furthest away from the joining flap, is fixed to the inside of the first side wall panel (6) to form a tubular section from the corner flap, and
• wherein a mastic-like filler (204;
• FA) in the form of a bead is applied in or on the inside of the second panel fold line (3) at the overlap area (200).

A rectangular box comprising:

• a rectangular base panel (2), having two transverse walls (6) or longitudinal walls (4), each forming a first side panel;
• and
• two longitudinal walls (4) or, respectively, transverse walls (6), each forming a second side panel,
• wherein,
• the first side panel is joined to the base panel via a first panel fold line (5),
• the second side wall panel is joined to the base panel via a second panel fold line (3),
• a joining flap is joined to the first side wall panel via a joining flap fold line (7), and
• the joining flap is the first flap section of a corner flap (8) which comprises at least three flap sections joined to one another via fold lines running parallel to the joining flap fold line, and one of the flap sections which is located furthest away from the joining flap is fixed to the inside of the first side wall panel to form a tubular section from the corner flap.