The present invention relates to an improved beam structure used to interlock articles such as so-called brick packages or interconnected cups or pots. Such groupings may constitute a single pair or any other desired arrangement such as two rows of two packages each, two rows of three, four or five packages each or greater number of rows of a desired number of containers. Ordinarily, such containers are smaller than an ordinary drinking glass and in order to provide for efficient handling during shipment and displays in retail outlets, it is desirable to stack the articles in tiers one above the other.
This invention relates particularly to a new beam structure which interconnects carrier side walls at their lower end. Previous beams have been constructed to form a "U-shaped" beam as highlighted in U.S. Patent No. 3,861,530, or French Patent No. 2 423 399. A further type of beam construction is that known as a "flat shape" beam. This can be found in U.S. Patent No. 2,764,284.
US 4 127 304 illustrates another type of beam structure in the form of an interior partition structure adapted to form two adjacent cells.
The problem with the U-shaped beam structure is that two folds are required along the lower end of the beam which increases the complexity of construction. The main problem associated with the flat-shape beam structure is the concentration of the score lines to one particular point, which is undesirable.
The present invention has overcome the difficulties associated with the previous types of beam, by providing a cut line to relieve the stresses caused by a concentration of score lines as well as to facilitate the beam formation.
In accordance with one aspect of the invention there is a beam structure of a carrier for packaging a plurality of articles. The beam structure bridges between opposed carrier side walls to be interposed between the articles and further to support the articles. The beam structure comprises a pair of bracket panels extending downwardly from the side walls, a pair of strips each extending between the bracket panels, a pair of gusset panels hingedly interconnecting each bracket panel with the strips. Each bracket panel is disposed in a face to face relationship with the gusset panels of a respective pair. The strips are hinged along their common lower side edge to form a beam of a substantially V-shaped cross-section. The lower end portion of each bracket panel is severed by a cut from the adjacent portions of the beam structure.
In one optional feature of this aspect of the invention, the beam formed from the strips is provided at each end thereof with the respective pair of gusset panels so that each end of the beam is hingedly connected to the each bracket panel.
In another optional feature of this aspect of the invention, each bracket panel is hingedly connected along its opposing side edges to the gusset panels of the respective pair, the side edges of each bracket panel is disposed generally perpendicular to each other, and the cut extends partially along the side edges of each bracket panel.
In a further optional feature of this aspect of the invention, each bracket panel is substantially trapezoidal in shape and is hingedly connected along its opposing oblique side edges to the gusset panels of the respective pair, and the cut extends entirely along a shorter edge of said each bracket panel.
In yet a further optional feature of this aspect of the invention, the strips define therebetween an acute angle to facilitate formation of said beam.
A second aspect of the invention provides a carrier for packaging a plurality of articles. The carrier comprises a pair of opposed side walls, and a beam structure which beam structure bridges between the side walls to support the articles.
A third aspect of the invention provides a blank for forming an article carrier having a beam structure of a substantially V-shaped cross-section. The blank comprises a pair of spaced carrier side walls, a pair of bracket panels extending toward each other from the side walls respectively, a pair of strips each extending between the bracket panels, and a pair of gusset panels hingedly interconnecting each of the bracket panels with the strips. The strips are hingedly connected together along a common side edge thereof to form the beam structure. A portion of each bracket panel is severed by a cut from the gusset panels of a respective pair.
Preferably, the beam structure to be formed from the strips may be provided at each end thereof with the respective pair of the gusset panels so that each end is hingedly connected to each bracket panel.
According to an optional feature of the third aspect of the invention each bracket panel may be hingedly connected along opposing side edges thereof to the gusset panels of the respective pair, the side edges of each bracket panel being disposed generally perpendicular to each other. Preferably, the cut may extend partially along the side edges of each bracket panel.
According to another optional feature of the third aspect of the invention each bracket panel may be substantially trapezoidal in shape and is hingedly connected along opposing oblique side edges thereof to the gusset panels of the respective pair, and the cut extends entirely along a shorter edge of each bracket panel.
Embodiments of the invention will now be described, by way of example only, with reference to the following drawings in which:
As illustrated in Figure 1, there is shown part of a carrier for forming a beam structure 10 attached to a carrier for packaging a plurality of horizontally arranged articles. The carrier is made from paperboard or similar foldable sheet material. The beam structure 10 extends between opposed carrier side walls 12, 14, and comprises a pair of oppositely disposed bracket panels 16, 18 hingedly connected to respective one of said side walls 12, 14.
Part of the carrier blank for forming one end of the beam structure 10 is shown in Figure 2. It comprises a bracket panel 16 hingedly connected along its upper edge to carrier side wall 12 along fold line 20. In this embodiment, the bracket panel 16 is substantially trapezoidal in shape. The bracket panel 16 is hinged along each of its opposing side edges 22, 24 to one of a pair of substantially triangular gusset panels 26, 28 along fold lines 30, 32 respectively. Gusset panel 26 is foldably connected along fold line 34 to a support panel 36. Likewise, gusset panel 28 is foldably connected along fold line 38 to a second support panel 40. First and second support panels 36, 40 are foldably connected together along their common side edge by fold line 42 and are connected to gusset panels 44, 46 at the opposite end of the beam structure 10, shown in Figure 1.
Each gusset panel 26, 28 is partially separated from bracket panel 16 by cut lines 48, 50 respectively which extend from fold lines 30, 32 respectively to the intersections of fold lines 34 and 38. Another cut line 52 separates bracket panel 16 from support panels 36, 40 and extends between cut lines 48 and 50 respectively.
The opposite end of beam structure 10 comprises a bracket panel 18 and gusset panels 44, 46 hingeably connected to bracket panel 18 and the other end of first and second support panels 32, 34. The above-mentioned panels 18; 44, 46 are in symmetrically opposite positions to bracket panel 16 and gusset panels 26, 28 and are of similar construction and not therefore more specifically described.
Turning to the construction of the carrier and in particular the beam structure 10, shown in Figure 1, the carrier is part erected to provide a pair of oppositely disposed side walls 12, 14. The bracket panels 16, 18 are hingeably connected to opposed carrier side walls 12, 14 such that the beam structure 10 is formed below the side walls 12, 14. The beam structure 10 is constructed by folding first and second support panels 36, 40 along their common fold line 42 and into an angular relationship with each other. Gusset panels 26, 28 folded into a face to face relationship with bracket panel 16 along fold line 30, 32. Likewise, gusset panels 44, 46 are folded in a face to face relationship with bracket panel 18 along fold lines 53, 55 respectively. The expression "face to face relationship" as used herein refers to either the arrangement wherein each gusset panel is in contact with the respective bracket panel face to face or the arrangement wherein each gusset panel is opposed to the respective bracket panel face to face with a space therebetween. In a face to face contacting relationship, each gusset panel 26, 28; 44, 46 may be attached to the respective bracket panel 16, 18 by glue or other means known in the art.
Each pair of gusset panels 26, 28; 44, 46 are folded about fold lines 36, 38; 54, 56 and are thereby brought into a substantially perpendicular arrangement with support panels 36, 40, to form the beam structure 10, shown in Figure 1. The other panels of the carrier can be placed in a set up condition such that the beam structure is able to receive and support at lip portion at least one article by the upper edges of support panels 36, 40.
As shown in Figure 1, the beam structure 10 extends between opposed carrier side walls 12, 14 enabling the structure to be interposed between articles and further to support the articles. The beam structure 10 comprises bracket panels 16, 18 extending downwardly from side walls 12, 14 and pairs of gusset panels 26, 28; 44, 46 hingeably connected with said bracket panels 16, 18 to form face to face relationship. Strips 36, 40 extend between and are hingeably connected to the gusset panels 26, 28; 44, 46. The strips 36, 40 are hinged along their common lower side edge 42 to form a beam of a substantially V-shaped cross-section, the lower end portion of each bracket panel 16, 18 being severed by a cut 48, 50, 52 from the adjacent portions of said beam structure 10.
Figure 3 illustrates part of the forming tool "T" used to fold the support panels 36, 40 along the fold line 42 and also illustrates a relief angle α formed between the support panels 36, 40. The relief angle α facilitates the engagement and disengagement of the forming tool "T" upon formation of the beam structure 10. To form the beam structure 10, the forming tool "T" is moved in the direction "A" as indicated in Figure 3. Cut lines 48, 50 and 52 separate the lower end portion of the bracket panel 16 from the gusset panels 26, 28 as well as from the support panels 36, 40. It will be appreciated by those skilled in the art that the relief angle α can be altered by moving fold lines 30, 32; 34, 38 and/or cut lines 48, 50 or 52 according to particular requirements of the beam structure 10. The bracket panels 16, 18 are not necessarily trapezoidal in shape but may be triangular, pentagonal, or hexagonal. The positioning of cut lines 48, 50, 52 can be altered to any desired position in order to provide relief to the stresses caused by the concentration of fold lines. However, it is preferred that the relief angle α is kept small enough to allow smooth introduction of articles into the carrier. A beam structure with a too wide relief angle would interfere with the articles to be loaded into the carrier. A preferred relief angle is an acute angle less than thirty (30) degrees.
The present invention and its preferred embodiment relates to a beam structure in a top gripping carrier which is shaped to provide satisfactory strength to hold at least one article securely but with a degree of flexibility so that the load transferred to the beam structure is absorbed by a carrier. The shape of the blank minimizes the amount of paperboard required. The carrier can be applied to an array of articles by hand or automatic machinery. It is anticipated that the invention can be applied to a variety of carriers including, but not limited to, those disclosed in U.S. Patent Nos. 2,764,284; 2,823,063; 2,823,064; 3,861,530; and 5,682,996 and French Patent No. 7811397 which patents are hereby incorporated by reference.