Patent Application
20120292221
Bricks and other masonry materials are typically bundled as a plurality of stacked individual units (i.e., individual bricks) formed into a 3-dimensional bundle. The bundle includes one or More package straps, corner protectors, and a void board that is placed between two horizontal layers of bricks. Generally, the void board is placed above a layer of bricks that has bricks omitted, e.g., forming openings in the bundle. Additional layers of bricks are placed on top of the board. The openings, which are typically centrally disposed, are configured to allow the tines of a forklift or similar device to pass into the bundle. In moving the package of bricks, the forklift exerts a force on the underside of the board to lift the entire package. Typically, the openings are formed extending through the entire depth of the bundle.
One known void board is formed as a veneer. These veneer void boards are often of poor quality and have a tendency to warp and degrade after prolonged exposure to the elements. Warping results in uneven surfaces upon which layers of bricks are stacked, which in turn can result in package instability and/or the inability to insert the forklift tines.
Other void boards use solid or ribbed plastic sheets. Such void boards are disclosed in Duke et al., U.S. Pat. No. 6,989,184, Varma, et al., U.S. Pat. No. 7,838,095, and Kruelle et al., Published U.S. Patent applications publication Nos. 2008/0311334 and 2008/0311335, all of which are commonly assigned with the present application and incorporated herein by reference. While the polymeric void boards have been found to function well at a given thickness, they require a higher material weight (and thus, cost) than desired for such a consumable item. When a thinner sheet is used (and thus, less material), it has been found that the boards may not have the desired stiffness. To increase stiffness, a board having a wide, ski-like element formed on one or both sides of the board has been used. While this functions well for some applications, it also adds material weight and cost to the board.
Moreover, there has been an industry shift to the use of textured bricks. These bricks, unlike conventional bricks, may not have flat sides or faces. Rather, the faces of the bricks may be irregularly shaped or non-planar. As such, when a ski-containing sheet-like board is used, the bricks may tend to lean or skew to one side, because the ski creates a fulcrum on which the bricks rest. This results in the brick bundle not being properly strapped and can cause package (bundle) instability and/or failure.
Other polymeric or plastic sheets have been used that include embossings or shapes formed in the sheets, transverse to the plane of the sheet. It has been observed that the embossings can collapse under the weigh of the bricks, especially when the bundle is subject to vibration, as during transport, and consequently bundle failure can occur.
Accordingly, there is a need for a void board that is of consistent quality, reliability, and strength to allow stable stacking of bricks for bundle forming, without crushing the board. Desirably, such a void board does not collapse after exposure to the elements and/or vibration, and provides a planar, consistent support, even when used with irregularly surfaced bricks.
More desirably, such a void board is used as a component in a brick package or bundle in which corner edge protectors and straps are used to complete the package to, for example, facilitate storage, handling, shipping and the like.
A polymeric void board is configured for placement between adjacent horizontal layers of bricks to maintain an opening in a lower of the brick layers. The board includes a relatively thin base element having first and second opposing sides. A plurality of ribs extends along a length of the base element. The ribs extend from both the first and second sides, generally transverse to the base element.
In an embodiment, the ribs are positioned such that the ribs extending from the first side of the base are offset from the ribs extending from the second side of the base element. The base element has a longitudinally extending central region, between a closest pair of ribs, that is devoid of ribs.
In this embodiment, the ribs extend from the base element at a base portion. The base portion has a width that is less than a width of an end of the ribs. In such a configuration, the ribs have a truncated pyramidical profile that defines a truncated portion that is contiguous with the base element. The ribs can be formed in mirror image relation to one another relative to a longitudinal centerline of the base element. A recess can be formed in the base element, on the side opposite of each rib.
The void board is preferably formed from a thermoplastic or thermoplastic-blend material. The material can be a filled polymer.
In another embodiment void board is formed as a relatively thin base element having first and second opposing sides and a plurality of ribs extending along a length of the base element. The ribs extend from the first and second sides, generally transverse to the base element, and are positioned such that the ribs extending from the first side of the base element are aligned with the ribs extending from the second side of the base element. Each rib, when viewed in cross-section, has a semi-circular profile.
A bundled load of objects is formed with the void board. In such a bundle, an array of objects are arranged in multiple horizontal layers. Each horizontal layer is formed of multiple objects. At least one opening is defined in at least one horizontal layer by an absence of at least one object.
The array defines four sides, a top and a bottom. The four sides, top and bottom define four vertical edges, four top horizontal edge and four bottom horizontal edges.
The polymeric void board is positioned between the horizontal layer of objects having the opening therein and an adjacent upper horizontal layer of objects. At least one corner edge protector is positioned on one of the top or bottom horizontal edges and strap is positioned around the array and the corner edge protector to secure the corner edge protector against the edge.
Corner edge protectors can be positioned at opposing top horizontal edges and multiple straps can be positioned around the array to form the bundle of objects.
A method of bundling a load of objects includes the steps of providing an array of objects arranged in multiple horizontal layers with each horizontal layer formed of multiple objects. The bundle includes at least one opening in at least one horizontal layer that is defined by an absence of at least one object. The array defines four sides, a top and a bottom. The four sides, top and bottom define four vertical edges, four top horizontal edges and four bottom horizontal edges,
A void board is positioned between horizontal layers of objects, above the layer having the opening therein. An edge protector is positioned on at least one top horizontal edge and a strap is positioned around the load of objects and the edge protector to secure the edge protector to the load and to bundle the load.
These and other features and advantages of the present invention will be readily apparent from the following detailed description, in conjunction with the claims.
While the present device is susceptible of embodiments in various forms, there is shown in the drawings and will hereinafter be described exemplary and non-limiting embodiments, with the understanding that the present disclosure is to be considered an exemplification of the device and is not intended to be limited to the specific embodiments illustrated.
With reference now to the figures and in particular to
The bundle 10 is maintained in the 3-dimensional configuration by straps 18 that are positioned about the bundle 10. In a typical bundle 10, vertical straps (in the y-direction) are positioned around the bundle 10 extending in both the x and z-directions. Horizontal straps (not shown) can be used. Corner edge protectors 20 are disposed along the corners of the bundle 10 between the bricks 14 and strap 18 to protect the bricks 14 from damage due to rubbing and accidental bumping. The corner protectors 20 also preclude strap 18 failure due to, for example, abrasion.
In order to readily transport the bundle 10, openings 22 are formed in the bundle 10 by removing or eliminating bricks 14 in a predetermined area of the matrix. The openings 22 are configured to, for example, permit the insertion of the t of a forklift. In this manner, the tines can be inserted into the openings 22 and the bundle 10 raised and transported as desired.
To maintain the layer 16d of 14 bricks above the opening 22, the void board 12 is placed between the horizontal layers 16c and 16d of bricks 14, that is, above the layer 16c in which the openings 22 are formed.
An embodiment of the void board 12 is illustrated in
In an embodiment of the board 12, the ribs 30 are formed extending from both sides 32, 38 of the base element. The ribs 30 can be formed in a staggered configuration so that the ribs 30a extending from one side 32 of the base element 28 do not oppose the ribs 30b extending from the other side 38 of the base element 38. That is, the ribs 30a extending from one side 32 of the base element 28 are between ribs 30b extending from the opposite side 38 of the base element 28. It has been found that this staggered arrangement of the ribs 30 prevents high and/or low spots as the bricks 14 lie on the board 12, that could otherwise tend to allow the bundle 10 to skew. The staggered arrangement can also permit the board to dissipate heat and thus cool faster during manufacture.
In the embodiment illustrated in
As seen in
A present board 12 can be manufactured in a variety of length, particularly, if the board is manufactured using extrusion methods. An exemplary board 12 has a width w12 of about 5.0 to 5.5 inches and a thickness t12 of about 0.05 inches. The board 12 can include ten ribs, five on each side of the centerline A12. In this arrangement, four ribs 30a are formed on one side 32 of the board 12 and six ribs 30b on the opposite side 38 of the board 12. The ribs 30 can be formed with the inboard most ribs 30b′ formed about 2.25 inches spaced from one another (or about 1.125 inches from the centerline), and with the second set of ribs 30a′ (on the opposite side 32 of the board 12) spaced about 3.0 inches apart (or about 1.5 inches from the centerline). The remaining ribs 30a, 30b can be equally spaced outboard of the first and second ribs 30b′ and 30a′ such that the spacing between ribs 30 is about equal to the edges 42 of the board 12. The last or outboard most ribs are formed at or near the outer edges 42 of the board 12.
The ribs 30 can extend transverse from the base element 28, relative to a center C12 of the board 12 to a height h30 of about 0.0935 inches (such that a rib end 44 to rib end 44 dimension or height h44 is about 0.187 inches) and can extend from the surface 32 or 38 of the element 28 about 0.069 inches. The ribs 30, at the ends 44 can have a width w44 of about 0.115 inches. A juncture (as indicated at 46) of the ribs 30 and the base element 28 can be rounded to better distribute stresses transferred from the ribs 30 to the base element 28.
An alternate embodiment of the board 112 is illustrated in
The materials from which the board 12, 112 is formed can vary. Exemplary materials include high density polyethylene (HDPE), polyvinylchloride (PVC), polyethylene terephthalate (PET), acrylonitrile butadiene styrene (ABS), polystyrene (PS), combinations of these and other polymers, and the like. Other suitable materials will be recognized by those skilled in the art. The materials can include, as desired, fillers, stabilizers, colorants and the like to achieve certain desired physical, chemical and processing (e.g., manufacturing) characteristics.
It is anticipated that the board 12, 112 will be formed by an extrusion process, however, other methods for manufacture of the board 12, 112 are contemplated.
In an exemplary bundling operation, full courses of bricks 14 are laid (e.g., layer 16a) until the course 16c that includes the forklift openings 22. Edge protectors 20 can be positioned at about the lower edges 70 of the first course 16a of bricks 14. The edge protectors 20 can be positioned at all four edges 70a-d, or at two, opposing edges 70a, 70c as desired. It is anticipated that edge protectors 20 will be used wherever strap 18 is positioned around the bundle 10 to prevent damage to the bricks 14, to prevent strap 18 failure, for example due to abrasion, and to better stabilize the bundle 10.
A partial course 16c of bricks 14 is then positioned outboard and between the positions that the forklift openings 22 will occupy. One or more void boards 12 are then positioned over the partial course 16c of bricks 14 that define the openings 22, and a full course 16d of bricks 14 is then positioned over the partial course 16c of bricks 14 and the void board 12 until a desired height (e.g., to 16j) of the bundle 10 is achieved. Edge 20 protectors can then be positioned along the top edges, for example at edges 72a and 72c to correspond to the location and position of the edge protectors 70a and 70c on the first course 16a of bricks 14, and strap material 18 is used to secure the bundle 10. A top sheet (not shown) may be provided on the bundle 10, between the bricks 14 and the strap 18 material, to provide additional protection for the bricks 14.
In the disclosure, the use of the disjunctive is intended to include the conjunctive. The use of the definite article or indefinite article is not intended to indicate cardinality. In particular, a reference to “the” object or “a” or “an” object is intended to denote also one of a possible plurality of such objects.
All patents referred to herein, are hereby incorporated herein by reference, whether or not specifically done so within the text of this disclosure.
From the foregoing it will be observed that numerous modification and variations can be effectuated without departing from the true spirit and scope of the novel concepts of the present disclosure. It is to be understood that no limitation with respect to the specific embodiments illustrated is intended or should be inferred. The disclosure is intended to cover by the appended claims all such modifications as fall within the scope of the claims.
This application claims the benefit of priority of Provisional U.S. patent application Ser. No. 61/488,018, filed May 19, 2011, the entire disclosure of which is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61488018 | May 2011 | US |
