Blank for manufacturing a device for packaging at least one windscreen wiper blade, and corresponding packaging device

A method for manufacturing a packaging device for at least one windshield wiper blade, using a blank,

• wherein the blank is of elongate shape and comprises at least first and second adjacent longitudinal zones,
• wherein each of the at least first and second longitudinal zones is configured to form a longitudinal face of the packaging device,
• wherein the first and second longitudinal zones are respectively articulated at each of their ends to first and second end zones via a transverse fold line,
• wherein the first and second end zones are able to form respectively first and second substantially transverse flaps of the packaging device,
• wherein the longitudinal length of the first end zone is greater than that of the second end zone,
• the method comprising forming the first flap from the first end zone and then forming the second flap from the second end zone by folding and gluing.