Bi-level dual cell carton

Claim 1

A bi-level, dual cell carton formed of a unitary blank of foldable sheet material such as paperboard, comprising: (a) front and rear side wall panels and first and second end wall panels foldably joined to each other to form a tubular structure open at the ends; (b) said end wall panels being of different heights; (c) an internal partition panel extending between said side wall panels in parallel relation with said end wall panels to divide the interior of said tubular structure into two adjacent cells of different heights; (d) upper and lower closure flaps joined to upper and lower edges, respectively, of said side wall and end wall panels and being folded into overlapped relation to close the upper and lower ends of said tubular structure; (e) said upper closure flaps including an extension foldably joined to shorter of said end wall panels and including: (i) a first section joined to an upper edge of said shorter end wall panel and folded normal thereto to overlie the shorter of said cells; (ii) a second section joined to an inner edge of said first section and folded normal thereto against a portion of said partition panel; (iii) a third section joined to an upper edge of said second section and folded normal thereto to overlie the taller of said cells; (f) said upper closure flaps further including a first outer closure flap foldably joined to said front side wall panel and disposed to overlie said first section of the extension and a second outer closure flap foldably joined to said rear side wall panel and disposed to overlie said third section of the extension; and (g) a lock flap foldably joined to an upper edge of said rear side wall panel and being folded downwardly 180° into engagement with said first outer closure flap.