Auto-erected carton bottom and associated carton blank
AssigneeThe C.W. Zumbiel Company
InventorSteven J. Block
Life of this patent
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Abstract
A carton has an automatically erected bottom that securely closes the bottom of the carton. In one embodiment, the carton blank has two major side panels and two minor side panels serially connected. The carton blank has two bottom flaps which form the bottom of the carton. Each bottom flap is connected to one of the major side panels and one of the minor side panels. The carton blank avoids the erecting and forming issues associated with prior art carton blanks which have an automatically erected bottom.
Claims20
A carton blank comprising:
- a first, a second, a third and a fourth side panel;
- a first bottom flap foldably connected to a bottom edge of each of the first and second side panels;
- a second bottom flap foldably connected to a bottom edge of each of the third and fourth side panels;
- a first bottom flap corner and a second bottom flap corner on the first bottom flap and the second bottom flap, respectively;
- and
- the first and second bottom flaps cooperating to form a bottom of a carton when the carton blank is erected into the carton with the first bottom flap corner being juxtaposed between folded portions of the second bottom flap and the second bottom flap corner being juxtaposed between folded portions of the first bottom flap.
A carton blank comprising:
- a first, a second, a third and a fourth side panel serially connected to together;
- a first bottom flap foldably connected to a bottom edge of each of the first and second side panels;
- a second bottom flap foldably connected to a bottom edge of each of the third and fourth side panels;
- a first bottom flap corner and a second bottom flap corner on the first bottom flap and the second bottom flap, respectively;
- wherein each of the first and second bottom flaps further comprises a minor panel flap portion and a major panel flap portion and each minor flap portion further comprises a triangular flap portion and an adhesive flap portion;
- the bottom flaps cooperating to form a bottom of a carton when the carton blank is erected into the carton with the first bottom flap corner being juxtaposed between the triangular flap portion and the adhesive flap portion of the second bottom flap and the second bottom flap corner is juxtaposed between the triangular flap portion and the adhesive flap portion of the first bottom flap when the carton blank is formed into the carton.
A method of forming a carton from a carton blank having four interconnected side panels and two bottom flaps, each bottom flap being foldably coupled to two adjacent side panels and having a free edge, the method comprising the steps of:
- folding a first side panel to be generally perpendicular to a second side panel adjacent thereto;
- folding a first minor flap of the bottom flap coupled to the first side panel to be generally perpendicular to the first side panel;
- forming a first slot in portions of the first minor flap;
- folding a fourth side panel to be generally perpendicular to a third side panel adjacent thereto;
- folding a second minor flap of the bottom flap coupled to the third side panel to be generally perpendicular to the third side panel;
- forming a second slot in portions of the second minor flap;
- folding the third side panel to be generally perpendicular to the second side panel adjacent thereto;
- inserting a portion of the free edge of the bottom flap coupled to the fourth side panel into the first slot;
- and
- inserting a portion of the free edge of the bottom flap coupled to the second side panel into the second slot and thereby forming a bottom on carton.
Dependencies are inferred from the claim text.