Packet for tobacco products and flat blank for making the packet

A packet for tobacco products, the packet substantially shaped as a parallelepiped and extending along a main direction, the packet comprising:

• a front wall,
• a rear wall facing the front wall,
• a pair of side walls including a first side wall and a second side wall,
• a bottom wall and a top wall, the bottom wall and the top wall being perpendicular to the main direction and having a same perimeter extension length;
• a first pair of corner walls comprising respectively a first corner wall and a second corner wall each having a transversal dimension variable along the main direction;
• the first corner wall having a geometry complementary to a geometry of the second corner wall to keep substantially constant a perimeter extension length of a transverse section of the packet along the main direction, the transverse section being defined on a plane perpendicular to the main direction;
• wherein the first corner wall is interposed between the first side wall and the front wall and the second corner wall is interposed between the second side wall and the rear wall such that the first and second corner walls are positioned at opposite sides of the packet with respect to a central axis of the packet;
• a second pair of corner walls comprising respectively a third corner wall and a fourth corner wall, each having a transversal dimension variable along the main direction;
• the third corner wall having a geometry complementary to a geometry of the fourth corner wall to keep substantially constant the perimeter extension length of the transverse section of the packet along the main direction;
• wherein the third corner wall is interposed between the second side wall and the front wall and the fourth corner wall is interposed between the first side wall and the rear wall such that the third and fourth corner walls are positioned at opposite sides of the packet with respect to the central axis of the packet;
• wherein the first corner wall and the third corner wall converge toward one of the top wall and the bottom wall, and the second corner wall and the fourth corner wall converge toward the other of the top wall and the bottom wall;
• a box body including an upper edge forming an opening for access to a compartment for containing the tobacco products;
• a lid hinged to the box body at the upper edge to rotate relative to the box body between a position in which the access opening is closed and a position in which the access opening is open;
• the first and second corner walls extending partly on the box body and partly on the lid.