Polygonal paperboard drum

A generally flat, collapsed envelope for a polygonal paperboard container, which comprises:

• a one-piece reinforcing member, consisting of at least six, foldably connected, substantially rectangular, reinforcing flaps, arranged in a row;
• and
• a one-piece body member, formed by two sets of at least three, substantially rectangular, foldably connected, side wall panels, arranged in a row, and a polygonal bottom panel of at least four sides, formed from two foldably connected, polygonal, bottom flaps and foldably connected along its opposite sides to the central side wall panel of each set of side wall panels;
• the lateral sides of the reinforcing member being in substantially abutting relationship but not overlapping;
• one bottom flap of the bottom panel lying directly atop the other bottom flap of the bottom panel;
• the sets of side wall panels being located on opposite sides of the reinforcing member, the side wall panels being bonded to the reinforcing flaps, and the lateral sides of one set of side wall panels being in close proximity to but not overlapping the lateral sides of the other set of side wall panels;
• the abutting lateral sides of the reinforcing member being located inwardly adjacent to a fold line between adjacent side wall panels of the body member and the closely proximate lateral sides of the sets of side wall panels of the body member being located outwardly adjacent to fold lines between adjacent reinforcing flaps of the reinforcing member;
• a substantially rectangular, body flange being foldably connected to each side wall panel along one side of each set of side wall panels remote from the bottom panel;
• and
• the lateral sides of the body flanges being connected by tabs, so that the lateral sides of the body flanges are connected until the container is to be closed.