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An integral carton blank from which a carton is formed having an end with three upstanding carton walls forming a pair of spaced-apart outside corners with reinforcing corners nested within each outside corner. The reinforcing corners are formed of reinforcing shoulders integrally joined to the end

An integral carton blank from which a carton is formed having an end with three upstanding carton walls forming a pair of spaced-apart outside corners with reinforcing corners nested within each outside corner. The reinforcing corners are formed of reinforcing shoulders integrally joined to the end walls of the carton. Each reinforcing shoulder has three panel portions, two overlying a side wall and one overlying an end wall. Substantial portions of the panels of the reinforcing shoulder engage a floor of the carton to provide improved compressive strength.

대표청구항 ▼

A carton blank from which a carton is formed, having an end with three consecutive upstanding walls forming a pair of spaced-apart outside corners with reinforcing shoulders nested within each outside corner, the blank having a substantially rectangular configuration, the blank comprising: a floor p

A carton blank from which a carton is formed, having an end with three consecutive upstanding walls forming a pair of spaced-apart outside corners with reinforcing shoulders nested within each outside corner, the blank having a substantially rectangular configuration, the blank comprising: a floor panel having two pairs of opposed edges with side wall panels joined to one of the pairs of opposed edges of the floor panel, and with top cover panels on either side of said side wall panels and joined thereto with fold lines; end wall panels joined to the second pair of opposed edges of the floor panel by respective flexible joint lines, each end wall panel having a pair of generally opposed lateral edges; a reinforcing shoulder extending from each lateral edge of the end panels to opposed peripheral edges of the blank, each reinforcing shoulder including first, second and third serially adjacent reinforcing panels, the first reinforcing panel hingedly connected to a lateral edge of the side wall panel along a first hinge line, the first, second and third reinforcing panels of each reinforcing shoulder extending along one side of adjacent side wall and top cover panels such that the first panel and a portion of the second panel extend along the sidewall panel and the third panel extend along the cover panel; one pair of laterally opposed reinforcing shoulders generally coextensive with one of said sidewall panels with one cover panel located therebetween, so that the one cover panel and the reinforcing shoulders have free edges at one said peripheral edge of the blank; said one cover panel having a pair of opposed edges extending from a free edge of said one cover panel so as to form corners of the cover panel thereat, the opposed edges located opposite a pair of third reinforcing panels, respectively; a tab formed exclusively in only one pair of said third reinforcing panels so as to extend from said one cover panel adjacent a corner thereof; a second hinge lines joining each pair of first and second reinforcing panels so that said second and said third reinforcing panels can be folded against said first reinforcing panel and said end wall, respectively; third hinge lines joining said second and said third reinforcing panels, the third hinge lines located closer to the peripheral edge of the blank than the fold lines joining the cover and sidewall panels, and said third hinge lines positioned to lie adjacent said first hinge line when said first and said second reinforcing panels are folded about said second hinge line; said third reinforcing panels configures to have a lower edge lying immediately adjacent the joint line joining the end wall and floor panel when said second and said third reinforcing panels are folded about said second hinge line; said first and second panels thereafter foldable about said first and said third hinge lines so that the lower edges thereof and the lower edges of said third reinforcing panel are positioned immediately adjacent the floor panel when said side wall is folded about the joint line toward the floor panel; and edges of said first, second and third reinforcing panels together comprising a substantially continuous edge forming a colinear extension of said joint line; whereby said first, second and third reinforcing panels cooperate to form a reinforcing shoulder reinforcing adjacent ones of said side walls and said end walls.