One-piece reinforced container

• US 4,214,695 A
• Filed: 03/26/1979
• Issued: 07/29/1980
• Est. Priority Date: 03/26/1979
• Status: Expired due to Term

• Current Assignee: International Paper Company
• Original Assignee: International Paper Company
• Inventors: Cooper, Keith A.
• Primary Examiner(s): Moorhead, Davis T.
• Application Number:
  US06/023,861
• Time in Patent Office: 491 Days
• Field of Search: 221/31 R, 221/31 FS, 221/33, 221/34 R, 221/36
• US Class Current: 229/143
• CPC Class Codes: B65D 5/248 and at least one side being extended and doubled-over to enclose the adjacent gusset flaps
• CPC Class Codes: B65D 5/443 Integral reinforcements, e.g. folds, flaps double walls B65D5/02

Abstract

A one-piece reinforced paperboard container suitable for rapid manual filling and assembling is described and claimed. The container has novel multi-purpose corner constructions in that they impart to the container enhanced structural strength while providing a locking feature. Assembling the container requires no manufacturer'"'"'s joints, eliminating the need for stitching, stapling, taping and the like. The container is suitable for packing many products such as meat.

Claims

1. A one-piece cut and scored paperboard blank for making a one-piece reinforced container comprising:

a generally rectangular bottom panel defined by a pair of first longitudinal scorelines and a pair of first lateral scorelines;

a pair of generally rectangular side panels, each hingedly connected to the bottom panel along one of the first longitudinal scorelines, each of the side panels being defined by one of the first longitudinal scorelines, and by a pair of second lateral scorelines which are offset from and meet said pair of first longitudinal scorelines slightly inwardly from their ends;

a pair of generally rectangular end panels, each hingedly connected to the bottom panel along one of the first lateral scorelines, each of the end panels being defined by one of the first lateral scorelines, and a pair of second longitudinal scorelines;

four generally rectangular corner members hingedly connected to;

(a) the side panels along the second lateral scorelines;

(b) the end panels along the second longitudinal scorelines; and

(c) portions of the bottom panel along the offsets of the first longitudinal scorelines, each corner member containing a diagonal, perforated scoreline beginning at the intersection of the lateral ends of the side panel with the bottom panel, whereby the corner member is adapted to fold along this diagonal scoreline as the side panels and end panels are folded upwardly;

four connecting members, each hingedly connected to a corner member and to a locking wing along a lateral scoreline;

four locking wings, each hingedly connected to a connecting member along a lateral scoreline, the length of each locking wing being substantially equal to the width of each side panel;

a pair of generally rectangular cover flaps, each hingedly connected to an end panel along a third lateral scoreline;

four container locking assemblies, each hingedly connected to a cover flap along a fourth longitudinal scoreline, and each cut free from a corner locking wing along a first oblique cut and a first lateral cut, so that the outermost portion of each container locking assembly is a generally rectangular tab whose length is substantially equal to the width of each side panel; and

four generally trapezoidal cut-outs, each of which communicates with an end panel along a longitudinal cut, with a container locking assembly along a second lateral cut, with a connecting member along a second oblique cut, and with a cover flap along a third oblique cut, the second and third oblique cuts being in parallel relationship.

2. The blank according to claim 1 further comprising four generally rectangular slots located in the bottom panel, each slot being positioned along one of the first longitudinal scorelines to be aligned with and to receive one of the locking wings upon assembly of the container from the blank.

3. The blank according to claim 2 further comprising two generally rectangular aligning tabs, each of which is situated generally medially along an outer longitudinal edge of a side panel and protrudes outward from the side panel a distance substantially equal to the thickness of the paperboard whereby the cover flaps of the assembled container will rest upon the aligning tabs.

4. The blank according to claim 3 in which the cover flaps are hingedly connected to the end panels along double lateral scorelines.

5. The blank according to claim 4 wherein the paperboard is corrugated paperboard.

6. A leak-resistant one-piece reinforced container constructed from paperboard coated or impregnated with a fluid barrier material and comprising:

a generally rectangular bottom panel;

a pair of generally rectangular side panels hingedly connected

to opposite sides of the bottom panel;

a pair of generally rectangular end panels hingedly connected

to opposite ends of the bottom panel;

four diagonally folded corner members hingedly connecting the end panels to the side panels so that the end panels meet the side panels to form a corner and the corner members fold to exteriorly abut the side panels;

four connecting members hingedly connected to the diagonally folded corner members along their upper lateral edges to span portions of the upper longitudinal edges of the side panels;

four locking wings hingedly connected to the connecting members and interiorly abutting the side panels;

securing means to engage the locking wings with the bottom panel thereby imparting structural integrity to the container;

a pair of generally rectangular cover flaps hingedly connected to the upper lateral edges of the end panels;

aligning tabs situated medially along the upper longitudinal edge of the side panels and protruding above the side panels a distance substantially equal to the thickness of the paperboard thereby preventing the cover panels from bowing downward particularly upon stacking; and

four container locking assemblies hingedly connected to the longitudinal edges of the cover flaps, each locking assembly comprising (a) a substantially triangular portion exteriorly abutting one of the side panels and one of the corner members to thereby retard leakage along the upper longitudinal edge of the side panel, and, (b) a generally rectangular tab having a length substantially equal to the width of a side panel and communicating with the exterior surface of the side panel to thereby impart additional support to the container.

7. The container according to claim 6 in which the paperboard is corrugated paperboard.