The invention generally relates to the packaging of mattresses for shipment, and more particularly, to the packaging of mattresses for shipment in containers using air, sea or ground transportation.
Large quantities of mattresses are imported from overseas into Canada and the United States, in particular from China and other Asian countries. The importation of large quantities of mattresses is driven by the reality that manufacturers in China and other Asian countries are able to produce mattresses at a lower cost than manufacturers in North America. When these mattresses are being transported, they are typically packaged and carried via ship in containers. There is a cost associated with the shipping, which is in part a function of the volume occupied by the mattresses.
In view of reducing shipping costs, various methods have been used for packaging mattresses for shipment to allow placing more mattresses in a given container. As will be appreciated, if a larger number of mattresses can be packaged within a given space, the shipping costs associated with any individual mattress will be lower. One example of a method of preparing mattresses for shipment is suggested in U.S. Pat. No. 7,458,193 and U.S. Pat. No. 7,895,813, the contents of which are incorporated herein by reference. Generally speaking, the suggested approach includes first individually compressing and wrapping mattresses, for example, by vacuum sealing each individual mattress. Following this, a set of individually compressed mattresses is stacked between upper and lower shipping supports. The stack of mattresses is then further compressed between the supports, which are then fastened to one another using coupling restraints in the form of straps. Following this, the stacked mattresses with the upper and lower shipping supports can be placed within a container for shipping.
Approaches of the type described above advantageously may allow a larger number of mattresses to fit within a given container and thus may enhance transportation cost efficiency.
A deficiency associated with assemblies of stacked mattresses prepared using methods of the type described above is that, on occasion the straps and/or the shipping supports get damaged during transport or handling due in part to the pressure exerted on these components by the compressed stack of mattresses. When damage occurs, the result in some cases is that the compressed mattresses expand within the containers used for the shipment. This expansion within the containers often makes removing the mattresses from such containers without damaging the mattresses difficult. As a result, the cost savings achieved by packing a larger number of mattresses per container is reduced by the cost of the damaged mattresses, which often can no longer be sold to customers.
In light of the above, there is a need in the industry for providing an improved assembly of stacked mattresses and an improved method for preparing such an assembly that alleviates, at least in part, the deficiencies with existing assemblies and methods.
In accordance with a first aspect, the invention relates to an assembly of stacked mattresses comprising a first pallet, a second pallet, a plurality of mattresses positioned between the first pallet and the second pallet and straps coupling the first pallet to the second pallet. The plurality of mattresses is in a compressed state between the first pallet and the second pallet and the straps restrain expansion of the plurality of mattresses. The second pallet is comprised of a supporting member and a plurality of elongated reinforcing members extending across the supporting member, at least some of the reinforcing members including respective strap guiding members extending longitudinally along the elongated reinforcing member. At least some of the straps engage respective ones of the strap guiding members of the plurality of elongated reinforcing member of the second pallet.
In accordance with a first specific example of implementation, at least some of the strap guiding members are comprised of hollow tubular portions extending longitudinally along the elongated reinforcing members of the second pallet and at least some of the straps pass through at least some of the hollow tubular portions.
In accordance with a second specific example of implementation, at least some of the strap guiding members are comprised of U-shaped portions extending longitudinally along the elongated reinforcing members of the second pallet and wherein the at least some of the straps are positioned within at least some of the U-shaped portions, the U-shaped portions restraining movement of the at least some straps relative to the supporting member of the second pallet.
In accordance with another alternative specific example of implementation, at least some of the strap guiding members extend longitudinally along the elongated reinforcing members of the second pallet and are comprised of a combination of hollow tubular portions and U-shaped portions positioned end-to-end.
In specific practical implementations, the strap guiding members may be made, for example, of a metallic material and/or a plastic material. The supporting member of the second pallet may be made at least in part of a wood-based material, such as for example a medium-density fiberboard (MDF) or a plywood material. The straps used to couple the first pallet to the second pallet may be made of any suitable material such as for example nylon, polypropylene and synthetic steel composite. Advantageously, it has been found that, in some cases, straps made of synthetic steel composite tend to be less affected by temperature variations, and in particular tend to be less affect by cold temperatures, than similarly sized nylon straps which may render such straps more durable and less likely to break that nylon straps.
In specific practical implementations, the supporting member of the second pallet has a surface area substantially similar to a surface area of an individual mattress in the plurality of mattresses. In non-limiting implementations, the supporting member of the second pallet may have a substantially rectangular shape.
In specific implementations, the plurality of mattresses may include any suitable number of mattresses. The number of mattresses in practical implementations may generally be selected based upon the number of mattresses that, when compressed between the two pallets, can reasonably fit within the specific container that is to be used for the shipment.
In a specific implementation, the first pallet has a configuration similar to that of the second pallet and is comprised of:
In the assembly, at least some straps engage respective ones of the strap guiding members of the plurality of elongated reinforcing members of the first pallet.
In accordance with another aspect, the invention relates to a pallet for use in shipping bedding products. The pallet comprises a supporting member and a plurality of elongated reinforcing members extending across the supporting member. At least some of the elongated reinforcing members include respective strap guiding members extending longitudinally along the elongated reinforcing members.
In accordance with a first specific implementation, at least some of the strap guiding members are comprised of hollow tubular portions extending longitudinally along the elongated reinforcing members, the hollow tubular portions being adapted for receiving there through straps.
In accordance with a second specific implementation, at least some of the strap guiding members are comprised of U-shaped portions extending longitudinally along the elongated reinforcing members. The U-shaped portions are configured to receive therein straps and for restraining movement of straps positioned therein.
In specific practical implementations, the strap guiding members may be made, for example, of a metallic material or a plastic material. The supporting member of the second pallet may be made at least in part of a wood-based material, such as for example a medium-density fiberboard (MDF) or a plywood material. The straps used to couple the first pallet to the second pallet may be made of any suitable material such as for example nylon, polypropylene and synthetic steel composite.
In accordance with another aspect, the invention relates to the use of a pallet of the type described above for shipping bedding products, such as for example mattresses, pillows and the like.
In accordance with another aspect, the invention relates to a method for preparing mattresses for shipment. The method comprises providing a first pallet and a second pallet. The second pallet is comprised of a supporting member and of a plurality of elongated reinforcing members extending across the supporting member, at least some of the elongated reinforcing members including respective strap guiding members extending longitudinally along the elongated reinforcing members. The method further comprises placing a plurality of mattresses on a surface of one of the first pallet and the second pallet and placing the other one of the first pallet and the second pallet on top of the plurality of mattresses. The method also comprises compressing the plurality of mattresses between the first pallet and the second pallet and coupling the first pallet to the second pallet using straps, the straps restraining expansion of the compressed plurality of mattresses. At least some of the straps engage respective ones of the strap guiding members of the plurality of elongated reinforcing members of the second pallet.
In accordance with a first specific example of implementation, at least some of the strap guiding members are comprised of hollow tubular portions extending longitudinally along the elongated reinforcing members. In the method, the step of coupling the first pallet to the second pallet includes passing at least some of the straps through at least some of the hollow tubular portions.
In accordance with a second specific example of implementation, at least some of the strap guiding members are comprised of U-shaped portions extending longitudinally along the elongated reinforcing members. In the method, the step of coupling the first pallet to the second pallet includes positioning at least some of the straps within at least some of the U-shaped portions. In some implementations, the U-shaped portions may restrain movement of the at least some straps relative to the supporting member of the second pallet.
In a specific practical implementation, the supporting member of the second pallet has a surface area substantially similar to a surface area of an individual mattress in the plurality of mattresses.
In specific implementations, the plurality of mattresses may include any suitable number of mattresses. The number of mattresses in practical implementations may generally be selected based upon the number of mattresses that, when compressed between the two pallets, can reasonably fit within the specific container that is to be used for the shipment. Practical implementations may include placing two or more mattresses upon the first pallet.
In a specific implementation, the method further comprising compressing individually the mattresses in the plurality of mattresses prior to placing the plurality of mattresses on the first pallet.
In a specific implementation, the first pallet has a configuration similar to that of the second pallet and is comprised of:
In this specific implementation, coupling the first pallet to the second pallet may further include engaging at least some of the straps with respective ones of the strap guiding members of the plurality of elongated reinforcing members of the first pallet.
In accordance with another aspect, the invention relates to an assembly of stacked mattresses prepared for shipment in accordance with a method of the type defined above.
In accordance with another aspect, the inventions relates to an assembly of stacked mattresses. The assembly comprises a first pallet, a second pallet, a plurality of mattresses positioned between the first pallet and the second pallet and straps coupling the first pallet to the second pallet. The plurality of mattresses is in a compressed state between the first pallet and the second pallet and the straps restrain expansion of the plurality of mattresses. The second pallet is comprised of a supporting member and of a plurality of elongated grove members extending across the supporting member. At least some of the straps engage respective ones of the elongated grove members of the second pallet.
These and other aspects of the invention will now become apparent to those of ordinary skill in the art upon review of the following description of embodiments of the invention in conjunction with the accompanying drawings.
A detailed description of embodiments of the invention is provided below, by way of example only, with reference to the accompanying drawings, in which:
In the drawings, embodiments of the invention are illustrated by way of example. It is to be expressly understood that the description and drawings are only for the purpose of illustrating certain embodiments of the invention and are an aid for understanding. They are not intended to be a definition of the limits of the invention.
The plurality of mattresses 302 is arranged in a stack atop the first pallet 401 and the second pallet 501 is positioned on top of the plurality of mattresses 302. The assembly 790 also includes straps 510 coupling the first pallet 401 to the second pallet 501. In a specific implementation, the plurality of mattresses 302 is in a compressed state between the first pallet 401 and the second pallet 501 and the straps 510 restrain the expansion of the plurality of mattresses 302. In the example depicted, an optional protective cover 908 shields the plurality of stacked mattresses from outside elements. The optional protective cover 908 may be made of any suitable material which may include, without being limited to corrugated cardboard, packaging paper, plastic wrapping and/or a woven nylon protective material.
In the example depicted, the upper (or second) pallet 501 includes a supporting member 502 and a plurality of elongated reinforcing members 503 extending across the supporting member 502. The reinforcing members 503 include respective strap guiding members 504 extending longitudinally along the elongated reinforcing member 503. The straps 510 engage respective ones of the strap guiding members 504 as they couple together the first and second pallets 401501. Advantageously, the elongated strap guiding members 504 may restrain movement of the straps 510 relative to the supporting member 502 and in that manner may reduce the amount of wear endured by the straps, which in turn may reduce the likelihood the straps will break. In this specific example, the elongated strap guiding members 504 include hollow tubular portions extending longitudinally along the elongated reinforcing members 503. The hollow tubular portions accommodate the straps 510, which pass through the hollow tubular portions.
In another example, not show in
In yet another example of implementation, not show in
In the specific example depicted, the lower (or first) pallet 401, is configured in a manner similar to the upper (or second) pallet 501 and includes a supporting member 402 and a plurality of elongated reinforcing members 403 extending across the supporting member 402. The reinforcing members 403 include respective strap guiding members 404 extending longitudinally along the elongated reinforcing member 403.
The straps 510 engage respective ones of the strap guiding members 404 and strap guiding members 504 as they couple the first and second pallets 401501 with one another. The straps 510 may be made of any suitable material such as nylon, polypropylene, synthetic steel composite or any other suitable material. In some embodiments, the straps 510 may be steel bands. In the example depicted, the ends of the strap 510 are coupled together with respective coupling devices 810.
In the example depicted, optional protective strips 910 positioned on the sides of the stack of compressed mattresses 302 may be provided. These protective strips 910 are generally aligned with the straps 510 extending between the first and second pallets 501401. More specifically, in some embodiments, the protective strips may be positioned to be generally aligned with the strap guiding members 404 and strap guiding members 504. Moreover, in some embodiments, the protective strips 910 may be placed on top of the protective cover 908, while in other embodiments the protective cover 908 may overlay the protective strips 910. The optional protective strips 910 may be made of any suitable material which may include, without being limited to polyurethane foam or felt padding. The use of protective strips 910 may advantageously reduce friction between the straps 510 and the stacked mattresses 302 and hence reduce the likelihood the straps will damage the mattresses during transport.
As depicted, the pallet 201 includes a supporting member 202 and a plurality of elongated reinforcing members 203 (where 203x, denote a specific elongated reinforcing member from the plurality of elongated reinforcing members 203) extending across the supporting member 202. In this example, the supporting member 202 has a first surface 207 and a second surface 206 and the plurality of elongated reinforcing members 203 are attached to the first surface 207 of the supporting member 202. In
The supporting member 202 may be made, for example, at least in part of wood, plastic, metal, and/or any other suitable material. More specifically, in some embodiments, the supporting member 202 may be made at least in part of wood-based materials which may include one or more wooden planks, plywood planks, boards and the like. The supporting member 202 may have a surface area that is substantially similar to a surface area of an individual mattress 301 in the stack of mattresses 302 in order to distribute the pressure exerted by the compressed mattresses over the surface of the supporting member 202. In specific practical implementations, the supporting member 202 may have a substantially rectangular shape generally corresponding to the shaped the mattresses being shipped. In specific practical implementations, the supporting member 202 may be a single sheet of plywood or a single sheet of medium-density fiberboard (MDF) that has dimensions (length and width) substantially similar to the dimensions of the mattress 301. In implementations in which the supporting member 202 is a single sheet of plywood or medium density fiberboard, the single sheet of plywood or medium density fiberboard may have any suitable thickness. In non-limiting implementations, a sheet of plywood having a thickness in the range of ¼ inch to 2 inches may be used. It is noted that the reinforcing members 204 increase the tensile strength of such a sheet of plywood and therefore permit a sheet of plywood of a lesser thickness to be used without compromising the solidity of the pallet 201.
As shown in
At least some of the elongated reinforcing members 203 include respective strap guiding members 204 extending longitudinally along the elongated reinforcing member 203. While all the reinforcement members shown in
The strap guiding members 204 may be configured to receive and guide one or more straps 510 (not shown in FIGS. 2A and 2B—shown in
The hollow tubular portions may be of a generally square, rectangular, semi-circular cross-sectional shape or of any other suitable shape. For example, the strap guiding members 204 may be A500 grade steel structural square tubes having a height of 2 inches, width of 2 inches and a wall thickness of ⅛ of an inch. However, the dimensions of the strap guiding members 204 are not limited to the example given above and any suitable dimension and cross-section may be used. By way of an example, the strap guiding members 204 may be made at least in part of metal, plastic or wood square or rectangular tubes having a height in the range of ½ an inch to 4 inches, a width in the range of in the range of ½ an inch to 4 inches and a wall thickness in the range of 0.065 of an inch to ½ an inch.
The elongated reinforcing members 203 may be fastened to the surface 207 of supporting member 202 using any suitable fastener or any suitable binding material. For example, the plurality of elongated reinforcing members 203 may be fastened to the supporting member 202 by one or more screws, nails, tacks, brackets or any other suitable mechanical fastener. In alternative embodiments, the reinforcing members 203 may be bound to the supporting member 202 using a glue, an adhesive or any suitable chemical binder. In the non-limiting embodiment depicted in
As depicted, the pallet 201′ includes a supporting member 202 and a plurality of elongated reinforcing members 203′ extending across the supporting member 202. In this example, the supporting member 202 has a first surface 207 and a second surface 206 and the plurality of elongated reinforcing members 203′ are attached to the first surface 207 of the supporting member 202. As shown in
At least some of the elongated reinforcing members 203′ include respective strap guiding members 204′ extending longitudinally along the elongated reinforcing member 203′. While all the reinforcement members shown in the figure including strap guiding members 204′, it is to be appreciated that in alternative embodiment only some reinforcing member 203′ may include strap guiding members 204′. As such, the number of strap guiding members 204′ need not be the same as the number of reinforcing members 203′.
The strap guiding members 204′ may be configured to receive and guide one or more straps 510 (not shown in FIGS. 2C and 2D—shown in
In this embodiment, at least some of the strap guiding members 204′ are comprised of U-shaped portions extending longitudinally along the reinforcing members 203′. The U-shaped portions are configured for receiving therein one or more straps 510 (not shown in
Although in
In addition, while the embodiments depicted in
The elongated grove members 2003 are configured for receiving and guiding one or more straps 510 (not shown in
In this embodiment, at least some of the elongated grove members 2003 are formed as U-shaped portions extending longitudinally along the reinforcing members 2003. The U-shaped portions are configured for receiving therein one or more straps (not shown in
In a specific implementation, the supporting member 2002 may be made of may be made, for example, at least in part of wood, plastic, metal, and/or any other suitable material and the elongated grove members 2003 are formed within the surface of the supporting member 2002. In a specific implementation, the U-shaped channels may have a width in the range of ½ an inch to 6 inches and a leg or flange height in the range of in the range of ½ an inch to 2 inches. It is noted that the leg or flange height will depending on the thickness of the supporting member 2002. Optionally, portions of the elongated grove members 2003 may be covered (not shown in the figures) to prevent straps engaged in the grove members 2003 from being displaced once the assembly of mattresses is formed.
Returning now to the embodiment depicted in
As shown, at step 101, a first pallet 401 and a second pallet 501 are provided. Next at step 102, mattresses are stacked upon the first pallet 401. Then, at step 103 the second pallet 501 is placed on top of the plurality of stacked the mattresses. At step 104 the mattresses between the first pallet 401 and the second pallet 501 are compresses to reduce the height of the stack of mattresses. Then, at step 105, the first pallet 401 and the second pallet 501 are coupled together to restrain expansion of the compressed mattresses 302. The coupling of the first pallet 401 to the second pallet 501 may be done using any suitable mechanism such as for example by using straps 510. Once the first pallet 401 and the second pallet 501 are coupled together, the assembly of mattresses 790 may be placed within a container (not shown) and may be transported to a desired destination, via rail, ship or truck for example. Each of the steps of the method 100 will now be discussed in more detail with reference to
At step 101, a first pallet 401 and a second pallet 501 are provided. The first pallet 401 and/or the second pallet 501 may be constructed according to any of the embodiments discussed above regarding the pallet 201, 201′, and/or 201″. For the purpose of the present example, the process described will consider that both the first pallet 401 and the second pallet 501 are constructed in the manner described with reference to pallet 201 described with reference to
At step 102 of the method 100, mattresses are stacked on the first pallet 401, which is illustrated in the perspective view shown in
Following this, at step 103 of the method 100, a second pallet 501 is placed upon the stack of mattresses 302, which is illustrated in the perspective view shown in
Optionally, protective materials may be used to protect the mattresses from the first pallet 401 and/or the second pallet 501. This variant is illustrated in the perspective view shown in
Optionally still, not shown in
For example, a protective cover 908, such as a protective sheath, may be used to cover the periphery of the stack of mattresses 302. The protective cover 908 may be wrapped around the sides of the stack of mattresses 302 and between the upper or second pallet 501 and the lower or first pallet 401. Such protective sheath may be made of any suitable material such as corrugated cardboard, packaging paper, plastic wrapping and/or any other suitable material, to further protect the mattresses. The protective cover 908 may be made of the same material as the protective material 604 and 608 used to protect the top and bottom of the stack of mattresses 302 from the respective second pallet 501 and first pallet 401 or may be a different material.
Optional protective strips 910 may be positioned on the sides of the stack of compressed mattresses 302. The optional protective strips 910 may be made of any suitable material which may include, without being limited to, polyurethane foam or felt padding. The protective strips 910 may be positioned generally along the sides of the stack of mattresses 302 between the upper or second pallet 501 and the lower or first pallet 401. More specifically, in some embodiments, the protective strips may be positioned to be generally aligned with the strap guiding members 404 and strap guiding members 504. Moreover, in some embodiments, the protective strips 910 may be paced on top of the protective cover 908, while in other embodiments the protective cover 908 may overlay the protective strips 910. (For examples of embodiments illustrating the protective strips 910 and protective cover 908 see
After the second pallet 501 has been placed upon the stack of mattresses 302, the process proceeds to step 104.
At step 104 of the method 100, the stack of mattresses 302 between the first pallet 401 and the second pallet 501 is compresses in order to reduce the height of the stack of mattresses.
After the assembly 700 has been compressed, the process proceeds to step 105.
At step 105 of the method 100, the first pallet 401 and the second pallet 501 are coupled together to restrain expansion of the plurality of mattresses and to maintain the stack of mattresses 302 in a compressed state and at substantially the stack predetermined set height 770.
In the specific example shown in the Figures, for each of the strap guiding members 503 on the second pallet 501 there is a corresponding strap guiding members 403 on the first pallet 401 in which at least one of the straps 510 passes through. In accordance with a specific and non-limiting example, in the case where the first pallet member 401 has strap guiding members 404a, 404b, . . . and 404e and the second pallet member 501 has strap guiding members 504a, 504b, . . . and 504e, then straps 510a, 510b, . . . and 510e may engage respective strap guiding members. For example, strap 510a may engage strap guiding members 404a and 504a, strap 510b may engage strap guiding members 404b and 504b, and so forth.
Depending on the type of straps used, ends of the straps may be coupled together with a connector or coupling device.
The compressed assembly of stacked mattresses 790, as illustrated in
Weights and dimensions, presented above, have been given for the purpose of example only and practical implementations of the components presented in the present document may use other suitable measurements that may vary from those presented here.
Although in some of the embodiments discussed above, the upper and lower pallets are constructed in the same or similar way, this is not necessarily the case for some alternative embodiments of the invention. An example of such an alternative embodiment of an assembly of stacked mattresses is depicted in
Certain additional elements that may be needed for operation of some embodiments have not been described or illustrated as they are assumed to be within the purview of those of ordinary skill in the art. Moreover, certain embodiments may be free of, may lack and/or may function without any element that is not specifically disclosed herein.
Although various embodiments and examples have been presented, this was for the purpose of describing, but not limiting, the invention. For example, although in the embodiments discussed above relate to assemblies of stacked mattresses and method for preparing such assemblies, similar assemblies (and method of preparing same) may also be considered for other types of bedding products such as for example mattress covers, bedding foam, pillows, quilts, comforters. Various other modifications and enhancements will become apparent to those of ordinary skill in the art. The invention is defined more particularly by the appended claims.
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Entry |
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Flat pallets for intercontinental materials handling—Principal dimensions and tolerances—ISO 6780:2003—Abstract Only. |
Number | Date | Country | |
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20150274356 A1 | Oct 2015 | US |