Pyramidal box envelope for receiving products to be packaged, produced by folding a prepared carton blank which has a location on which the products to be packaged are arranged, the box envelope being characterised in that the location is a quadrilateral of which: - two opposing sides (A1A2/A3A4) of peaks (A1, A2 and A3, A4) are sides produced by a folding segment (SMi) between the peaks (Ai), - the two other opposing sides (A2A3/A4A1) are each defined by the lateral segment (SLi) which is a segment of the straight line (D1, D2) which extends via the homologous peaks (A2, A3 and A4, A1) of the sides (A1A2/A3A4) produced, whose folding edges (LPi) originating from the peaks (A1 and A2) and (A3 and A4) join the respective edge of the blank, two panels (Pai) border the location and are each delimited by: - a lateral segment (SLi) extended at each end (Ai) by - a folding edge (LPi), - the panel (Pai) has a folding line (LRXi) which originates from each peak (Ai) of the lateral segment (SLi) and which is located beyond the limit segment (AiX), originating from this peak (Ai) on the straight line (D1, D2), two flaps (Rj) each border a folding segment (SMj) and are delimited by the two folding edges (LPi) which join the respective edge of the blank, - each folding edge (LPi) delimiting the flap (Rj) being located in the corner between the side produced (SMi) and the limit segment (AiX), - the folding edge (LPi) being the bisector of the angle between the folding line (LRXi) and the side produced (SMj), originating from this same peak (Ai), the two panels (Pai) form the envelope of the location by: - raising the panels (Pai) around the respective lateral segment (SLi), - folding the portion of the panel adjacent to the folding line (LPi) on the flap (Rj) in order to move the folding line (LRXi) to the side produced (SMj), and - folding the flap (Rj) which brings about the portion of the panel (Pai) adjacent to the respective folding edge (LPi) below the location where it is retained. - two opposing sides (A1A2/A3A4) of peaks (A1, A2 and A3, A4) are sides produced by a folding segment (SMi) between the peaks (Ai), - the two other opposing sides (A2A3/A4A1) are each defined by the lateral segment (SLi) which is a segment of the straight line (D1, D2) which extends via the homologous peaks (A2, A3 and A4, A1) of the sides (A1A2/A3A4) produced, whose folding edges (LPi) originating from the peaks (A1 and A2) and (A3 and A4) join the respective edge of the blank, - a lateral segment (SLi) extended at each end (Ai) by - a folding edge (LPi), - the panel (Pai) has a folding line (LRXi) which originates from each peak (Ai) of the lateral segment (SLi) and which is located beyond the limit segment (AiX), originating from this peak (Ai) on the straight line (D1, D2), two flaps (Rj) each border a folding segment (SMj) and are delimited by the two folding edges (LPi) which join the respective edge of the blank, - each folding edge (LPi) delimiting the flap (Rj) being located in the corner between the side produced (SMi) and the limit segment (AiX), - the folding edge (LPi) being the bisector of the angle between the folding line (LRXi) and the side produced (SMj), originating from this same peak (Ai), - raising the panels (Pai) around the respective lateral segment (SLi), - folding the portion of the panel adjacent to the folding line (LPi) on the flap (Rj) in order to move the folding line (LRXi) to the side produced (SMj), and - folding the flap (Rj) which brings about the portion of the panel (Pai) adjacent to the respective folding edge (LPi) below the location where it is retained.