Patent ID: 8911339

Claim:
A method of erecting a carton blank, the carton blank comprising: a first side panel, a bottom panel, a second side panel foldably connected to the bottom panel at a first transverse fold line, a first top panel foldably connected to the first side panel at a second transverse fold line, a second top panel foldably connected to the second side panel, a first bottom end panel at a first end of the bottom panel, a second bottom end panel at a second end of the bottom panel, at least one first top flap foldably connected to a first end of the first top panel at a first longitudinal fold line, the at least one first top flap comprising a pair of first top flap portions connected to one another at a first oblique fold line; at least one second top flap foldably connected to a second end of the first top panel at a second longitudinal fold line, the at least one second top flap comprising a pair of second top flap portions connected to one another at a second oblique fold line; at least one third top flap foldably connected to a first end of the second top panel at a third longitudinal fold line, the at least one third top flap comprising a pair of third top flap portions connected to one another at a third oblique fold line, and at least one fourth top flap foldably connected to a second end of the second top panel at a fourth longitudinal fold line, the at least one fourth top flap comprising a pair of fourth top flap portions connected to one another at a fourth oblique fold line; the method comprising: folding the at least one first top flap at the first oblique fold line, and folding the at least one second top flap at the second oblique fold line; folding the at least one third top flap at the third oblique fold line, and folding the at least one fourth top flap at the fourth oblique fold line; folding the first top panel with respect to the first side panel about the second transverse fold line; folding the second side panel with respect to the bottom panel about the first transverse fold line; folding the blank to form a tubular structure; folding the at least one first top flap and the at least one third top flap with respect to the first top panel and the second top panel about the first longitudinal fold line and the third longitudinal fold line, respectively; folding the first bottom end panel with respect to the bottom panel, gluing the first bottom end panel to an inner portion of the at least one first top flap and the at least one third top flap; and folding an outer portion of the at least one first top flap and the at least one third top flap about the first longitudinal fold line and the third longitudinal fold line, respectively, to overlap the first bottom end panel and to close a first end of the carton.