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US 4,378,904 AGranted
Collapsible open side carton
AssigneeChampion International Corporation
InventorDuane R. Mode
Life of this patent
Estimating the term…
Abstract
The carton is made from a one-piece blank which is erectable to an expanded condition from a flattened condition. The assembled carton is folded to the flattened condition at the point of manufacture for shipping to the point of filling. At the point of filling the flattened carton is expanded and the contents are placed in it. The carton has free end inwardly extending side wall panels which engage the end wall panels of the carton to hold the carton in the expanded condition.
Claims4
A collapsible paperboard carton comprising:
- (a) opposed front and back panels;
- (b) opposed end panels foldably connected to opposite ends of said front and back panels;
- and
- (c) opposed side panels foldably connected to opposite sides of one of said front and back panels, said side panels being free of connection with said end panels and the other of said front and back panels, said side panels being folded inwardly into the confines of said carton in face-to-face engagement with said front and back panels when said carton is in a flattened collapsed form, and said side panels, due to the inherent springiness of the paperboard, being operable to swing to a position disposed at an acute angle with respect to said one of said front and back panels, when said carton is in an expanded form and at least one end edge of each of said side panels being disposed in engagement with at least one of said end panels to retain said carton in said expanded form.
1 more element
Dependencies are inferred from the claim text.