Patent ID: 7261232

Claim:
A rectangular, one-piece blank ( 1 ) adapted to form a flat folded box, the folded box being manually erectable into a substantially tubular box with its ends being closed automatically, the blank comprising: two principal wall sections ( 5 , 9 ) which are connected to each other on one side by a principal folding line ( 10 ), two side wall sections ( 11 , 12 ) with tapering ends formed each in a respective one of the two principal wall sections ( 5 , 9 ) by two folding lines ( 14 , 15 ; 16 , 17 ) which are separated from each other in the center and merge into each other at their ends, the two side wall sections ( 11 , 12 ) being identical in shape and being each symmetrical with respect to a center line defined by the tapering ends of each side wall section ( 11 , 12 ), two closing sections ( 41 , 42 , 45 , 46 ; 43 , 44 , 47 , 48 ) connected each to the principal wall sections ( 5 , 9 ) by a continuous closure folding line ( 28 , 29 , 32 , 33 ; 26 , 27 , 30 , 31 ) which is disposed substantially transversely to the principal folding line ( 10 ), wherein the two folding lines of each sidewall section ( 14 , 15 ; 16 , 17 ) merge at the closure folding lines ( 28 , 29 , 32 , 33 ; 26 , 27 , 30 , 31 ) into two terminating folding lines ( 22 , 23 , 24 , 25 ) each extending in a respective one of the closing sections ( 41 , 42 , 45 , 46 ; 43 , 44 , 47 , 48 ) parallel to the principal folding line ( 10 ) and wherein no further transverse folding lines are provided between the two closure folding lines ( 28 , 29 , 32 , 33 ; 26 , 27 , 30 , 31 ), and a flap ( 39 ) connected to the side of one ( 5 ) of the principal wall sections ( 5 , 9 ) by a further terminating folding line ( 37 ) which is parallel to the principal folding line ( 10 ), wherein the principal folding line ( 10 ) and the further terminating folding line ( 37 ) each extend in the closing sections ( 41 , 42 , 45 , 46 ; 43 , 44 , 47 , 48 ) and wherein the principal folding line ( 10 ), the two folding lines ( 14 , 15 ; 16 , 17 ) and the further terminating folding line ( 37 ) are disposed such that when the two principal wall sections ( 5 , 9 ) are folded onto each other along the principal folding line ( 10 ), the further terminating folding line ( 37 ) coincides with an edge ( 35 ) of the opposite principal wall section ( 9 ) and the two side wall sections ( 11 , 12 ) are lying onto each other and that in the assembled state of the flat folded box ends of the folded box formed by the two closing sections ( 41 , 42 , 45 , 46 ; 43 , 44 , 47 , 48 ) are automatically closed by pressing the principal folding line ( 10 ) and the further terminating folding line ( 37 ) together.