Heavy duty folded corrugated pallet

Abstract

The invention generally relates to devices used for material handling, such as specifically, pallets and skids. More specifically, the present invention is directed toward a folded corrugated pallet. The folded corrugated pallet includes a body defined by a single sheet of corrugated cardboard. The sheet includes a plurality of scored lines extending parallel with respect to each other. The sheet is folded along the scored lines to define a plurality of legs extending in the direction of the scored lines. The sheet further includes at least one base wall extending between each of the legs, and a pair of wings. Each of the wings defines terminal edges that extend parallel to the scored lines and lie adjacent to each other when the wings are folded over the base wall. A planar interior panel of corrugated cardboard is disposed between the wings and the base wall.

Description

BACKGROUND

1. Field of the Invention

The invention relates, generally, to devices used for material handling, and more specifically, pallets and skids. More specifically, the present invention is directed toward a folded corrugated pallet.

2. Description of the Related Art

Typically, pallets are made from wood and molded polymers, allowing them to support heavy loads and be reused more than once or twice. While wood and molded polymer pallets have generally worked for their intended purposes, they suffer from certain disadvantages. For example, these types of pallets are relatively heavy, weighing approximately forty-five pounds. The weight of the pallets becomes significant when the number of pallets needed to accompany any given shipment of goods increases. The added weight reduces fuel economy and other efficiencies in the material handling process. In addition, and notwithstanding the relatively robust weight of the wood and molded polymer pallets of the type known in the related art, they suffer from the fact that they often end up broken after use of less than six times and are not recyclable.

In the past, there have been attempts at providing corrugated cardboard pallets as a low cost alternative to wood and molded polymer pallets. However, these attempts have been largely unsuccessful because the corrugated pallets have a much lower weight capacity than that of a wood or polymer pallet. Additionally, corrugated cardboard pallets typically do not last as long as wood or polymer pallets. Thus, there remains a need for a low cost corrugated cardboard pallet with an increased weight capacity and able to be reused several times.

SUMMARY

The present invention overcomes the deficiencies in the related art in a folded corrugated pallet including a body defined by a single sheet of corrugated cardboard. The sheet includes a plurality of scored lines extending parallel with respect to each other. The sheet is folded along the scored lines to define a plurality of legs extending in the direction of the scored lines. The sheet further includes at least one base wall extending between each of the legs, and a pair of wings. Each of the wings defines terminal edges that extend parallel to the scored lines and lie adjacent to each other when the wings are folded over the base wall. A planar interior panel of corrugated cardboard is disposed between the wings and the base wall. The pallet further includes an outer shell layer at least partially surrounding the body. The outer shell layer is defined by a single sheet of corrugated cardboard including a plurality of scored lines extending parallel with respect to each other. The sheet of the outer shell layer is folded along the scored lines to define a plurality of legs extending in the direction of the scored lines and at least one base wall extending between each of the legs.

Advantages of the corrugated pallet include increased strength and durability, as well as greatly reduced weight when compared to wood or polymer pallets. The increased strength affords the pallet a greater weight capacity. The greater weight capacity allows the pallet to be used in place of more expensive wood pallets. The increased durability allows the pallet to be reused several times, which reduces costs and waste from disposed pallets. Finally, the corrugated pallets of the type contemplated by the present invention are recyclable at the end of their useful life, thereby drastically reducing the environmental impact of this material handling component.

BRIEF DESCRIPTION OF THE DRAWINGS

Other advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:

FIG. 1 is a perspective view of a folded corrugated pallet.

FIG. 2 is an end view of the folded corrugated pallet of FIG. 1.

FIG. 3A is a plan view of a first sheet of corrugated cardboard with scored lines according to one embodiment.

FIG. 3B is a plan view of a first sheet of corrugated cardboard with scored lines according to one embodiment.

FIG. 4 is a cross-section view of a single-point scored line being formed in a sheet of corrugated cardboard.

FIG. 5 is a cross-section view of the sheet of corrugated cardboard of FIG. 4 folded along the single-point scored line.

FIG. 6 is a cross-section view of a point-to-point scored line being formed in a sheet of corrugated cardboard.

FIG. 7A is a cross-section view of the sheet of corrugated cardboard of FIG. 6 folded in a first direction along the point-to-point scored line.

FIG. 7B is a cross-section view of the sheet of corrugated cardboard of FIG. 6 folded in a second direction along the point-to-point scored line.

FIG. 8 is a perspective view of a body of a folded corrugated pallet according to one embodiment.

FIG. 9 is a perspective view of an outer wrap of a folded corrugated pallet according to one embodiment.

FIG. 10 is an exploded perspective view of a folded corrugated pallet including support pedestals and support beams.

FIG. 11 is an exploded perspective view of the folded corrugated pallet of FIG. 10 including a planar interior panel.

FIG. 12 is an exploded perspective view of the folded corrugated pallet of FIG. 10 including a planar interior panel.

FIG. 13 is an exploded perspective view of one embodiment of a first support panel for a support pedestal.

FIG. 14 is a perspective view of the support pedestal of FIG. 13.

FIG. 15 is an exploded perspective view of the support pedestal of FIG. 13 including the first support panel and a second support panel.

FIG. 16 is another perspective view of the support pedestal of FIG. 13.

FIG. 17 is a perspective view of a sheet for a support beam with scored lines according to one embodiment.

FIG. 18 is an exploded perspective view of the support beam of FIG. 17 and the support pedestal of FIG. 16.

FIG. 19 is a perspective view of the support beam of FIG. 18.

FIG. 20 is a perspective view of another embodiment of a first support panel for a support pedestal.

FIG. 21 is an exploded perspective view of the support pedestal of FIG. 20 including a second support panel.

FIG. 22 is a perspective view of the support pedestal of FIG. 21.

FIG. 23 is an exploded perspective view of another embodiment of a support pedestal including a first support panel, a second support panel, and a third support panel.

FIG. 24 is a perspective view of the support pedestal of FIG. 23.

FIG. 25 is a top view of the support pedestal of FIG. 23.

FIG. 26 is an exploded perspective view of another embodiment of a support pedestal including a first support panel and a pair of second support panels.

FIG. 27 is a perspective view of the support pedestal of FIG. 26.

FIG. 28 is a perspective view of a sheet for another embodiment of a support beam with scored lines.

FIG. 29 is a perspective view of the support beam of FIG. 28.

FIG. 30 is a partially cut-away perspective view of a planar interior panel and a corrugated inner layer according to one embodiment.

FIG. 31 is a partially cut-away perspective view of a planar interior panel and a corrugated inner layer according to another embodiment.

FIG. 32 is a perspective view of a planar interior panel according to yet another embodiment.

FIG. 33 is a perspective view of a planar interior panel according to yet another embodiment including cutouts.

FIG. 34 is a perspective view of a planar interior panel according to yet another embodiment including cutouts.

DETAILED DESCRIPTION

With reference to the Figures, wherein like numerals indicate like parts throughout the several views, a folded corrugated pallet 30 is generally shown in FIGS. 1 and 2. As one non-limiting example, the pallet 30 may be used to support goods during transport and storage. Goods may include boxes, materials, refuse, and the like.

The pallet 30 includes a body 32 defined by a single sheet 34 of corrugated cardboard. The sheet 34 includes a plurality of scored lines 36 extending parallel with respect to each other. The sheet 34 is folded along the scored lines 36 to define a plurality of legs 38 extending in the direction of the scored lines 36. The sheet further defines at least one base wall 40 extending between each of the legs 38 and a pair of wings 42. The body 32 has a first corrugation direction 37 that may extend perpendicular to the plurality of scored lines 36.

The pallet 30 further includes an outer shell layer 170 defined by a single sheet 172 of corrugated cardboard. The sheet 172 includes a plurality of scored lines 174 extending parallel with respect to each other. The sheet 172 is folded along the scored lines 174 to define a plurality of legs 176 extending in the direction of the scored lines 174. The sheet 172 further defines at least one base wall 178 extending between each of the legs 176. The outer shell 170 has a first corrugation direction 37 that may extend perpendicular to the plurality of scored lines 174.

As shown in FIG. 3A, the plurality of scored lines 36 are formed on the sheet 34 of the body 32 prior to folding. As will be discussed in more detail below, the scored lines 36 may be point-to-point scored lines. In the embodiment shown, the sheet 34 includes twelve scored lines 36. The sheet 34 is folded at each of the scored lines 36 to form the body 32 and to define three legs 38 and two base walls 40. Each leg 38 is formed from four scored lines 36. The scored lines 36 are arranged in groups of four scored lines 36 for each leg 38 that is to be formed. Those having ordinary skill in the art will appreciate that the quantity of scored lines 36 may be more or less depending on the quantity of legs 38. For example, a pallet 30 having only two legs 38 would have fewer than twelve scored lines 36, while a pallet having four legs 38 would have more than twelve scored lines 36. Each leg 38 is defined by a pair of downwardly extending side walls 39 and a bottom panel 41 parallel to the base wall 40. A height 43 of the legs 38 is defined between the bottom panel 41 and the base wall 40. The side walls 39 and bottom panel 41 each extend along the length of the scored lines 36, as will be discussed below.

As shown in FIG. 3B, the plurality of scored lines 174 are formed on the sheet 172 prior to folding. The scored lines 174 may be point-to-point scored lines. In the embodiment shown, the sheet 172 includes ten scored lines 174. The sheet 172 is folded at each of the scored lines 174 to form the outer shell 170 and to define three legs 176 and two base walls 178. Each leg 176 is formed from at least three scored lines 174. The scored lines 174 are arranged into groups for each leg 176 that is to be formed. Those having ordinary skill in the art will appreciate that the quantity of scored lines 174 may be more or less depending on the quantity of legs 176. For example, a pallet 30 having only two legs 38 would utilize an outer shell layer 170 with only two legs 176, which would have nine scored lines 174. Each leg 176 is defined by a pair of downwardly extending side walls 180 and a bottom panel 182 parallel to the base wall 178. A height 184 of the legs 176 is defined between the bottom panel 182 and the base wall 178. The side walls 180 and bottom panel 182 each extend along the length of the scored lines 174, as will be discussed below.

In the embodiment shown throughout the Figures, the base walls 40 may be further defined as a first base wall 40A, and a second base wall 40B. The legs 38 may be further defined as a pair of outer legs 38A and a center leg 38B. The pair of outer legs 38A is arranged such that each leg 38A forms one side of the pallet 30. The center leg 38B is arranged between the pair of outer legs 38A. The first base wall 40A extends between one of said outer legs 38A and said center leg 38B. The second base wall 40B extends between the other of said outer legs 38A and said center leg 38B. In other embodiments (not shown), the pallet 30 may include more than three legs 38 and therefore more than two base walls 40. In such embodiments, a base wall 40 would extend between each leg 38 to form the body 32.

Each of the wings 42 defines terminal edges 44 that extend parallel to the scored lines 36. The terminal edges 44 lie adjacent to each other when the wings 42 are folded over the base wall 40 during assembly. When the wings 42 are folded over the base wall 40 and the terminal edges 44 lie adjacent to each other, the body 32 generally defines a support surface 46 on the pallet 30. In some embodiments, the wings 42 may be configured such that when folded over the base wall 40, the terminal edges 44 lie adjacent to and in contact with each other. Alternatively, the wings 42 may be folded such that the terminal edges 44 are adjacent to each other with a gap. It is contemplated that the wings 42 may be configured such that the terminal edges 44 lie adjacent to each other and are spaced apart by some predetermined distance. It is also contemplated that in some embodiments, the wings 42 may be configured such that the terminal edges 44 lie adjacent to each other, as well as with the wings 42 overlapping to some predetermined extent.

The support surface 46 is generally flat such that goods may be placed on the pallet 30 for transport and storage. For example, boxes may be stacked on the pallet 30 and secured with strapping or shrink wrap. It is contemplated that raised walls may extend from the support surface 46 to contain irregular goods not easily stacked.

The legs 38 extend downward from the body 32 and elevate the support surface 46 when the pallet 30 is placed on a surface such as a trailer, a floor surface, or the like. The body 32 defines at least one fork channel 48 arranged between each leg 38 and the base wall 40. The fork channel 48 is configured to accept forks (not shown) commonly used to lift and transport the pallet 30. Those having ordinary skill in the art will appreciate that other lifting devices may utilize the fork channel 48 in order to lift the pallet 30. By way of non-limiting example, the lifting device may be a forklift, a pallet jack, a lift table, lifting straps, and other lifting devices known in the art.

Referring now to FIG. 8, the sheet 34 is folded along the scored lines 36 to define the legs 38 and base wall 40. The sheet 34 is folded to form the body 32, which defines an interior 50. As shown, each leg 38 has three sides folded to define a leg cavity 52 extending therethrough. The leg cavities 52 are open to the interior 50 of the body 32. The interior 50 is further defined by the wings 42, which are folded over the base wall 40 to define the support surface 46. A planar interior panel 54 may be disposed in the interior 50 between the wings 42 and the base wall 40. The interior panel 54 is supported by the base walls 40 and spans each of the leg cavities 52.

Similarly, in FIG. 9, the sheet 172 is folded along the scored lines 174 to define the legs 176 and base wall 178. The sheet 172 is folded to form the outer shell 170, which at least partially surrounds the body 32. As shown, each leg 176 has three sides folded to define an upwardly opening leg cavity 180 extending therethrough. The leg cavities 184 are open toward the body 32 of the pallet. The outer shell 170 is placed around the body 32 such that the leg cavities 184 of the outer shell 170 receive the legs 38 of the body 32. The outer shell 170 may be adhesively attached to the body 32.

As mentioned above, the scored lines 36, 174 may be any type used for articles constructed with folded corrugated cardboard. Referring to FIG. 4, one type of scored lines 36, 174 used with corrugated cardboard is single-point scores 140. Here, a sheet 142 of corrugated cardboard is sandwiched between two rollers, an upper roller 144 and a lower roller 146. Each sheet 142 includes two opposing surfaces, an upper surface 148 in contact with the upper roller 144 and a lower surface 150 in contact with the lower roller 146. The upper roller 144 includes a pointed male die 152 arranged about a circumference of the upper roller 144. The lower roller 146 may be flat, such as shown here, or may include a female die to receive the male die 152. The male die 152 is generally triangular with an apex extending toward the lower roller 146. As the corrugated sheet 142 passes between the rollers 144, 146 the male die 152 creates a single-point score 140 on the upper surface 148 of the sheet 142. As shown in FIG. 5, single-point scores 140 create a line about which the sheet 142 may be folded in one direction by allowing the upper surface 148 to buckle without tearing the lower surface 150.

Alternatively, the scored lines 36, 174 may be point-to-point scores 154, such as shown in FIGS. 6-7B, which facilitate folding the sheet 142 in two directions. Referring to FIG. 6, the sheet 142 or corrugated cardboard is sandwiched between two rollers, an upper roller 156 and a lower roller 158. Each sheet 142 includes two opposing surfaces, an upper surface 160 in contact with the upper roller 156 and a lower surface 162 in contact with the lower roller 158. The point-to-point scores 154 are defined by the upper surface 160 disposed in adjacent relationship with the lower surface 162. Each of the upper surface 160 and the lower surface 162 defines an apex 164 of a triangle with each apex 164 disposed in opposing adjacent relationship with respect to each other.

The upper roller 156 and the lower roller 158 each includes a pointed male die 166 arranged about a circumference of each roller 156, 158. Each male die 166 is generally triangular with an apex, with each male die 166 arranged such that respective apexes are arranged in opposing adjacent relationship with the other. As the corrugated sheet 142 passes between the rollers 156, 158 the male die 166 creates a point-to-point score 154 on both the upper surface 160 and the lower surface 162 of the sheet 142.

The point-to-point scores 154 are formed by two male roller elements that cooperate to define the scores in the corrugated cardboard. In this regard, point-to-point scoring may be imparted to the product in the corrugation machine, thereby eliminating any secondary scoring operations that could increase the cost of manufacturing the pallet 30 of the present invention. As shown in FIGS. 7A and 7B, point-to-point scores 154 create a line about which the sheet 142 may be folded in two directions by allowing either of the opposing surfaces 160, 162 to buckle without tearing the other.

To form the body 32 of the pallet 30, the scored sheet 34 is folded along the scored lines 36. As shown in FIG. 8, the sheet 34 must be folded along the scored lines 36A adjacent to the legs 38 and the base wall 40 in a direction opposite of that of the non-adjacent scored lines 36B. In embodiments of the pallet 30 having two legs 38, two of the scored lines 36A are adjacent to one of the legs 38 and the base wall 40. In embodiments of the pallet 30 having three legs 38, such as is shown in FIG. 3A, four of the scored lines 36A are adjacent to one of the legs 38 and one of the base walls 40. In order to allow the sheet 34 to be folded along the adjacent scored lines 36A in the opposite direction, these scored lines 36A are point-to-point scores 154. In order to further enhance the manufacturing efficiency of the pallet 30, the non-adjacent scored lines 36B may also be point-to-point scores 154.

To form the outer shell 170 of the pallet 30, the scored sheet 172 is folded along the scored lines 174. As shown in FIG. 9, the sheet 172 must be folded along the scored lines 174A adjacent to the legs 176 and the base wall 178 in a direction opposite of that of the non-adjacent scored lines 174B. In embodiments of the pallet 30 having two legs 38, two of the scored lines 174A are adjacent to one of the legs 38 and the base wall 40. In embodiments of the pallet 30 having three legs 38, such as is shown in FIG. 3B, four of the scored lines 174A are adjacent to one of the legs 176 and one of the base walls 178. In order to allow the sheet 172 to be folded along the adjacent scored lines 174A in the opposite direction, these scored lines 176A are point-to-point scores 154. In order to further enhance the manufacturing efficiency of the pallet 30, the non-adjacent scored lines 174B may also be point-to-point scores 154.

During assembly of the pallet 30, as shown in FIGS. 11 and 12, the planar interior panel 54 is placed on top of the base wall 40 in the interior 50 of the body 32. The wings 42 are folded over the base wall 40 and coupled to the interior panel 54 using any conventional fastening mechanism, such as an adhesive. The wings 42 secure the interior panel 54 in the interior 50. The interior panel 54 may be formed from one or more layers of corrugated cardboard. Each layer is arranged or stacked together to form the interior panel 54. As will be discussed in detail below, the interior panel 54 may be defined by a single sheet of corrugated cardboard, multiple sheets of corrugated cardboard, or an individual sheet of corrugated cardboard folded to define each layer. Each of the layers may be coupled to one another during assembly. For example, the layers may be bonded using an adhesive applied between each layer, with staples, or by any other suitable fastening mechanism. Each sheet may be single-wall corrugated cardboard or double-wall corrugated cardboard.

Referring now to FIGS. 9-11, the pallet 30 may further include a plurality of support beams 58 disposed in the legs 38 in spaced relationship with respect to each other. The support beams 58 act to strengthen the legs 38 further supporting the interior panel 54, and stabilize the legs 38 when the pallet 30 is loaded with goods. Each support beam 58 defines a height 59. The height 59 of the support beams 58 is equal to the height 43 of the legs 38. When the support beams 58 extend from the bottom panel 41 of the leg 38 to the interior panel 54 the shear strength of the pallet 30 is increased by maintaining perpendicularity of horizontal and vertical walls of the pallet 30.

Shown in FIGS. 17-19, each support beam 58 may include a beam wrap 190 and a plurality of support pedestals 56. Each of the support beams 58 is disposed in one of the legs 38 in spaced relationship with respect to each other. The support beams 58 provide increased strength to the pallet so as to prevent the legs 38 from buckling when the pallet 30 is loaded with goods by supporting the interior panel 54.

A first embodiment of a support pedestal 56 is shown in FIGS. 13-16 as a wrap block 192. The wrap block 192 includes a first support panel 206 having a plurality of scored lines 208 extending parallel with respect to each other. The wrap block 192 further includes a pair of second support panels 210 each defining a slot 212 and a scored line 214. The second support panels 210 are arranged into an X shape with slot 212 of each second support panel 210 intersecting with the slot 212 of the other second support panel 210. Each second support panel 210 is then folded along the respective scored line 214. The first support panel 206 is folded along the scored lines 208 into a generally rectangular shape defining an open middle portion 216. The pair of folded second support panels 210 is inserted into the open middle portion 216 such that the first support panel 206 least partially surrounds the second support panels 210.

The beam wrap 190 for the support beam 58 is formed from a single sheet of corrugated cardboard. Each beam wrap 190 has two terminal edges 194 and a plurality of scored lines 196 extending parallel with respect to each other and the terminal edges 194. The beam wrap 190 is folded along the scored lines 196 to define an interior 198. More specifically, each terminal edge 194 is folded toward the other, and in the same direction, along the scored lines 196. When viewed in an end view, the folded beam wrap 190 further defines two outer support walls 200 having a first length and extending parallel with respect to each other, and an inner support wall 202 having a second length and extending parallel with respect to and disposed between the outer support walls 200. The inner support wall 202 has two layers of corrugated cardboard disposed in adjacent side by side relationship. The second length of the inner support wall 202 is less than the first length of the two outer support walls 200 and therefore does not extend through the entire interior 198. Due to the shorter inner support wall 202, two outer portions 204 of the interior 198 are enlarged.

In FIG. 18 the folded beam wrap 190 and support pedestals 192 are shown an in exploded view with the support pedestals 192 outside the two outer portions 204. In FIG. 19 the support pedestals 192 are arranged in each of the outer portions 204 of the interior 198 in spaced relationship with each other such that the beam wrap 190 partially surrounds each support pedestal 192. Here, each support beam 58 includes four support pedestals 192 disposed in the interior 198. In embodiments of the pallet 30 having three legs 38, there may be one support beam 58 in each of the legs 38 for a total of three support beams 58. Consequently, each pallet 30 would include twelve support pedestals 192.

In some scenarios, the forks that are used to lift the pallet 30 may be inserted only partially into the fork channels 48 (i.e. the length of the forks is less than a length of the pallet 30) leaving the base walls 40 unsupported. In these scenarios, unsupported weight on the pallet 30 creates a shear force and a bending moment on the legs 38. These shear forces and bending moment may cause the body 32 and legs 38 to tear. In order to prevent the body 32 and legs 38 from tearing, the support beams 58 are inserted in each of the leg cavities 52.

Several alternatives of both the support beams 58 and support pedestals are contemplated and will be discussed below. For example, the pallet 30 may have any number of support pedestals 56 as necessary to support the interior panel 54. In one embodiment, three support pedestals 56 may be disposed in each leg 38 for a total of nine support pedestals 38 with two support beams 58 arranged in each leg 38 between the support pedestals 56. The support pedestals 56 are generally equally spaced along each leg 38 in order to distribute weight placed on the pallet 30. In some instances, it may be advantageous to space the support pedestals 56 unequally along each leg 38. For example, if the pallet 30 is used to support a load having an unequal weight distribution, the support pedestals 56 may be arranged closer together in areas of greater weight concentration.

In other embodiments, the pallet 30 may include fewer support pedestals 56. For example, two support pedestals 56 may be disposed in each leg 38, for a total of six support pedestals 56. Alternatively, the pallet 30 may have two legs 38 with three support pedestals 56 disposed in each leg 38, for a total of six support pedestals 56. It is contemplated that any combination of legs 38 and support pedestals 56 may be utilized as necessary to meet specifications for weight capacity.

Referring now to FIGS. 28 and 29, an alternative embodiment of the support beam 58 is shown. Each support beam 58 may be formed from a single sheet 64 of corrugated cardboard having two terminal edges 66 and a plurality of scored lines 68 extending parallel with respect to each other and the terminal edges 66. The sheet 64 is folded along the scored lines 68 to define the vertical support walls 60 and the horizontal support walls 62. More specifically, each terminal edge 66 is folded toward the other, and in the same direction, along the scored lines 68. When viewed in an end view, the support beam 58 has one vertical support wall 60 having two layers of corrugated cardboard disposed in adjacent side by side relationship and a part of the horizontal support wall 62 disposed in spaced relationship with respect to each other.

The pallet 30 may have any number of support beams 58 as necessary to support the legs 38. For example, two support beams 58 are disposed in each leg 38, for a total of six support beams 58. The support beams 58 are generally spaced at an equal distance along each leg 38 in order to equally distribute weight placed on the pallet 30; however, in some instances it may be advantageous to space the support beams 58 at an unequal distance along each leg 38. For example, if the pallet 30 is used with a load having an unequal weight distribution, the support beams 58 may be arranged closer together in areas of greatest weight concentration. Additionally, each support beam 58 may be longer or shorter depending on the specific requirements.

In other embodiments, the pallet 30 may include fewer support beams 58. For example, the pallet 30 may have two legs 38 with two support beams 58 disposed in each leg 38, for a total of four support beams 58. Those having ordinary skill in the art will recognize from the description of the invention as set forth herein that any combination of legs 38 and support beams 58 may be utilized as necessary to meet specifications for weight capacity. Furthermore, the support beams 58 may be omitted in order to reduce cost and weight.

Turning to FIGS. 20-27 several alternative support pedestals 56 are shown, each may include a first support panel 70 and a second support panel 72. The first support panel 70 has a plurality of scored lines 74 extending parallel with respect to each other. The first support panel 70 is folded along the scored lines 74 to at least partially surround the second support panel 72.

Referring now to FIGS. 20-22, a first alternative embodiment of the support pedestal 56 is shown as an X-block 76. In this embodiment, the X-block 76 includes a first support panel 78 and a second support panel 80. The first support panel 78 has a plurality of scored lines 82 extending parallel with respect to each other. Each of the first support panel 78 and the second support panel 80 defines a slot 84A, 84B. The scored lines 82 divide the first support panel 78 into six segments 86. The segments 86 are folded toward each other to form a rectangle with two of the segments forming a center cross panel. The second support panel 80 is inserted perpendicular to the two outermost panels 86 such that the slot 84A in the first support panel 78 is intersects with the slot 84B in the second support panel 80. When viewed in cross-section taken along a plane defined parallel to the base wall 40, the first support panel 78 and the second support panel 80 define an X shape.

The first support panel 78 and the second support panel 80 may be formed from corrugated cardboard. The support panels 78, 80 may be formed by die cutting, stamping, or cut with a saw. The slots 84A, 84B may be formed by any of the same processes as the support panels 78, 80. Additionally, the first support panel 78 may include perforations 88 along the scored lines 82 to aid in folding.

Referring now to FIGS. 23-25, a second alternative embodiment of the support pedestal 56 is shown. Here, the support pedestal 56 is shown as a star-block 90. The star-block 90 includes a first support panel 92, a second support panel 98A, and a third support panel 98B. Each of the support panels 92, 98A, 98B defines at least one slot. The first support panel 92 has a plurality of scored lines 94 extending parallel with respect to each other. The first support panel 92 defines a plurality of slots 96 with a tapered shape to aid during assembly. Each of the second support panel 98A, and 98B defines at least one slot 100A, 100B. The slot 100A in the second support panel 98A is inserted in the slot 100B in the third support panel 98B to form a cross shape with radially extending arms 102. Each radially extending arm 102 defines a slot 104. The second support panel 98A and the third support panel 98B may each be formed from two sheets of corrugated cardboard arranged adjacent to each other.

The first support panel 92 is folded along the plurality of scored lines 94 to form a generally round shape when viewed in cross-section taken along a plane defined parallel to the base wall 40. The second and third support panels 98A, 98B are inserted into the first support panel 92 such that the slot 104 in each radially extending arm 102 intersects with one of the slots 96 in the first support panel 92.

A third alternative embodiment of the support pedestal 56 is shown in FIGS. 26 and 27. Here, the support pedestal 56 is shown as a channel block 106. The channel block 106 includes a first support panel 108 having a plurality of scored lines 110 extending parallel with respect to each other and a pair of second support panels 112. The scored lines 110 divide the first support panel 108 into at least four segments 114. The segments 114 are folded toward each other along the scored lines 110 to form a rectangle when viewed in cross section taken along a plane defined parallel to the base wall 40. The pair of second support panels 112 are inserted into the rectangle formed by the first support panel 108. The pair of second support panels 112 are made from paperboard that has been formed to have two flat faces that meet at a corner and a curved face wrapped around the two flat faces. Other configurations for the second support panels 112 are possible, for example circular, rectangular, or octagonal.

Several embodiments of the interior panel 54 are shown in FIGS. 30-32. Specifically, in FIG. 30, the interior panel 54 is shown as a single sheet 116 of corrugated cardboard including a corrugated inner layer 118 having a second corrugation direction 120. The sheet 116 has at least one scored line 122 extending perpendicular to the second corrugation direction 120. The interior panel 54 is folded along the at least one scored line 122 to create two layers. It should be appreciated that additional scored lines 122 would be used to form an interior panel 54 with more than two layers.

Another embodiment of the interior panel 54 is shown in FIG. 32. Here, the interior panel 54 includes two sheets 124 of corrugated cardboard stacked together. The sheets 124 may be bonded to each other using an adhesive, such as glue, applied between each sheet 124. The sheets 124 may also be coupled together using staples, other fasteners, or a combination of fasteners and adhesive. Each sheet 124 may be single wall corrugated cardboard, having a single corrugated inner layer and two flat outer layers. Alternatively, each sheet 124 may be double wall corrugated cardboard, having two corrugated inner layers separated by a flat inner layer, and two flat outer layers.

In FIGS. 33 and 34, another embodiment of the interior panel 54 is shown. In this embodiment, the interior panel 54 includes a single sheet 126 of corrugated cardboard. The sheet 126 defines a plurality of cutouts 128 aligned with the support pedestals 56 and spaced with respect to each other. Each cutout 128 is arranged to receive one of the support pedestals 56 when the pallet 30 is assembled, which prevents the support pedestals 56 from moving in the legs 38. The cutouts 128 are shaped such that all or part of the support pedestals 56 may be inserted into the cutout 128. For example, as shown in FIG. 33, the cutouts 128A are shaped such as to receive the pair of second support panels 112 of the channel block 106. Alternatively, as shown in FIG. 34, the cutouts 128B are shaped such as to receive the star block 90.

The pallet 30 is assembled by first folding the sheet 34 along the plurality of scored lined 36 as discussed above to form the body 32. The plurality of support pedestals 56 are each assembled and inserted in the legs 38. An adhesive, such as glue, is used to secure the support pedestals 56. As shown in FIGS. 10 and 11, support beams 58 may be inserted in the legs 38 between the support pedestals 56 and secured with glue. Next, adhesive is applied to the base walls 40 and the interior panel 54 is secured in the interior 50 of the body 32. Finally, glue is applied to the interior panel 54, the wings 42 are folded over the base walls 40 and secured to the interior panel 54.

As mentioned above, the body 32 has a first corrugation direction 37 and the interior panel 54 has a second corrugation direction 120. The pallet 30 may be assembled with the first corrugation direction 37 parallel with the second corrugation direction 120. Alternatively, the pallet 30 may be assembled with the first corrugation direction 37 perpendicular to the second corrugation direction 120.

While several options have been suggested to secure each part of the pallet 30 during assembly, an adhesive such as glue is particularly advantageous. The strength of the pallet 30 is increased, and in turn, the pallet's 30 reusability. When the interior panel 54 is secured to the base walls 40 and the wings 42 are subsequently secured to the interior panel 54, the sheet 34 of the body 32 wraps around the support pedestals 56 and the interior panel 54. By wrapping, the sheet 34 is placed in tension, preventing movement of support pedestals 56 and preventing the base walls 40 from bending. When goods are placed on the support surface 46 of the body 32, the weight of the goods is supported by the tension in the sheet 34. Owing to the high shear-strength of glue, the tension in the sheet 34 is maintained, allowing the pallet 30 to support increased weight.

Advantages of the corrugated pallet 30 over the prior art include increased strength and durability, as well as reduced weight and cost of manufacture. The increased strength allows the pallet 30 to utilize a lightweight construction and a greater weight capacity. The lightweight construction enables a person to move an empty pallet 30 without additional equipment such as a pallet jack. Furthermore, the increased durability allows the pallet 30 to be reused several times, reducing costs and waste. By using sheets of corrugated cardboard in commercially standard sizes with minimal additional processing, the pallet 30 is able to be produced at a lower cost. The increased strength affords the pallet a greater weight capacity. The greater weight capacity allows the pallet to be used in place of more expensive wood pallets. The increased durability allows the pallet to be reused several times, which reduces costs and waste from disposed pallets. Finally, the corrugated pallets of the type contemplated by the present invention are recyclable at the end of their useful life, thereby drastically reducing the environmental impact of this material handling component.

The invention has been described in an illustrative manner, and it is to be understood that the terminology which has been used is intended to be in the nature of words of description rather than of limitation. Many modifications and variations of the present invention are possible in light of the above teachings, and the invention may be practiced otherwise than as specifically described.

Claims

1. A folded corrugated pallet comprising: a body defined by a single sheet of corrugated cardboard, said sheet includes a plurality of scored lines extending parallel with respect to each other, said sheet folded along said scored lines to define a plurality of legs extending in the direction of said scored lines, at least one base wall extending between each of said legs, and a pair of wings;each of said wings defining terminal edges that extend parallel to said scored lines and lie adjacent to each other when said wings are folded over said base wall;a planar interior panel of corrugated cardboard disposed between said wings and said base wall; andan outer shell layer defined by a single sheet of corrugated cardboard, said sheet of said outer shell layer includes a plurality of scored lines extending parallel with respect to each other, said sheet folded along said scored lines to define a plurality of outer shell layer legs extending in the direction of said scored lines and at least one base wall extending between each of said outer shell layer legs, wherein said outer shell layer corresponds to said body and at least partially surrounds said body.

2. The folded corrugated pallet as set forth in claim 1, wherein said plurality of scored lines in said outer shell layer is further defined as ten scored lines, said sheet folded along said scored lines to define three legs.

3. The folded corrugated pallet as set forth in claim 2, wherein said base wall is further defined as a first base wall and a second base wall and said legs are further defined as a pair of outer legs and a center leg, said first base wall extending between one of said outer legs and said center leg and said second base wall extending between the other of said outer legs and said center leg.

4. The folded corrugated pallet as set forth in claim 2, wherein at least four of said plurality of scored lines of said outer shell layer are further defined as point-to-point scores defined by opposing surfaces in adjacent relationship with respect to each other with each of said point-to-point scores adjacent to one of said plurality of legs and said at least one base wall.

5. The folded corrugated pallet as set forth in claim 4, with said opposing surfaces of said sheet of corrugated cardboard each defining an apex of a triangle with each apex disposed in opposing adjacent relationship with respect to each other.

6. The folded corrugated pallet as set forth in claim 1, wherein said plurality of scored lines in said body is further defined as twelve scored lines, said sheet folded along said scored lines to define three legs.

7. The folded corrugated pallet as set forth in claim 6, wherein at least four of said plurality of scored lines in said body are further defined as point-to-point scores defined by opposing surfaces in adjacent relationship with respect to each other with each of said point-to-point scores adjacent to one of said plurality of legs and said at least one base wall.

8. The folded corrugated pallet as set forth in claim 1, further including a plurality of support beams, said support beams disposed in said legs in spaced relationship with respect to each other.

9. The folded corrugated pallet as set forth in claim 8, wherein each of said support beams includes a beam wrap and a plurality of support pedestals, said beam wrap defined by a single sheet of corrugated cardboard having a plurality of scored lines extending parallel with respect to each other, said sheet folded along said scored lines to define an interior; said plurality of support pedestals including a first support panel having a plurality of scored lines extending parallel with respect to each other and a second support panel, said first support panel folded along said scored lines to at least partially surround said second support panel; andwherein said support pedestals are arranged in said interior of said beam wrap in spaced relationship with respect to each other.

10. The folded corrugated pallet as set forth in claim 9, wherein said beam wrap includes two outer support walls having a first length and extending parallel with respect to each other and an inner support wall having a second length and extending parallel with respect to and disposed between said outer support walls, wherein said second length is less than said first length.

11. The folded corrugated pallet as set forth in claim 9, wherein said second support panel is further defined as a pair of second support panels, and wherein each of said second support panels defines a slot, each of said slots in said second support panel intersecting with each other to define an X shape when viewed in cross-section taken along a plane defined parallel to said base wall.

12. The folded corrugated pallet as set forth in claim 9, wherein each of said first support panel and said second support panel defines a slot, said slot in said first support panel intersecting with said slot of said second support panel, said first support panel and said second support panel define an X shape with respect to each other when viewed in cross-section taken along a plane defined parallel to said base wall.

13. The folded corrugated pallet as set forth in claim 9, wherein said support pedestal further includes a third support panel with each of said support panels defining at least one slot, said slot in said second support panel intersecting with said slot in said third support panel to form radially extending arms each defining a slot, and said slot in each of said radially extending arms intersecting with one of said slots in said first support panel.

14. The folded corrugated pallet as set forth in claim 9, wherein said second support panel is further defined as a pair of support panels.

15. The folded corrugated pallet as set forth in claim 9, wherein said plurality of support beams is further defined as three support beams, with one support beam disposed in each of said legs.

16. The folded corrugated pallet as set forth in claim 9, wherein said plurality of support pedestals is further defined as twelve support pedestals with four support pedestals disposed in said interior of each of said beam wraps.

17. The folded corrugated pallet as set forth in claim 1, wherein said wings are adhesively attached to said interior panel and said outer shell layer is adhesively attached to said body.

18. The folded corrugated pallet as set forth in claim 1, wherein said planar interior panel is defined by two layers of corrugated cardboard.

19. The folded corrugated pallet as set forth in claim 1, wherein said planar interior panel includes at least one scored line and is folded along said at least one scored line to form two layers.

20. The folded corrugated pallet as set forth in claim 1, wherein said planar interior panel comprises double-wall corrugated cardboard.