Paper Pallet

Abstract: There is disclosed a paper pallet comprising of a first sheet (10), a second sheet (20) and support means (30), wherein the support means (30) is part of the first sheet (10) and second sheet (20) formed by cutting, creasing, folding and securing tongues (35,37). The tongue (35) intersects at a 90 degree angle with the tongue (37) and a flange (32) is secured to the slot (34) which forms "slot in" locking means. the strength of the present invention can be further increased by adding a reinforcement core (36) to the inside of the hollow space within the support means (30) or alternatively the reinforcement core (36) may enclose the fastened tongues (35,37) to form the support means (30). The invention can be varied in dimension, height and numbers of the support means (30).

Description: This invention relates to a paper pallet in accordance with the preamble of claim 1 for supporting cargoes during transportation, shipment and storage. A pallet is an apparatus widely used to transport cargoes from one place to another. The idea of a pallet is to facilitate cargo shipment or delivery in an easy and safe manner. There are a wide range of pallets with different types and functions according to the type of cargoes to be transported. Paper pallets have long been used for the transportation and storage of various merchandise. Lately, such pallet structures have become increasingly sophisticated to meet varying standards and demands. An example of a prior pallet is given in US-A-4228 744, which discloses a pallet of paperboard, which is made of two sheets of such paperboard which are cut to define interlocking tabs. These tabs have a tendency to splay, and hence the pallet can collapse under a load of a cargo thereon. Another example is found in DE-U-9 106 264. It is an object of the invention to overcome the disadvantages of known paper pallets. Thus, according to the invention, there is provided a pallet as set out in the introduction, in which pallet on at least some of the tongues a slot is located between the end of the opening and the hinge, and the openings on those tongues intersecting with tongues with slots have a flange extending into the opening to form a constricted portion of the opening, said flange being capable of being received in the slot to lock the tongues together. The pallet of the invention may comprise a reinforcing member or members, which may be disposed around and/or within at least one of said plurality of support means. It is preferred that the pallet of the invention and the reinforcing means comprise corrugated fibreboard and/or paperboard or any other suitable material, and they may be treated with a water resistant coating. According to a second aspect of the invention there is provided a kit for assembly of a pallet as hereinbefore defined. Thus it will be understood that a pallet embodying the invention is easily assembled and each part of it is joined and secured by way of "slot in" locking means without using any added materials such as glue, nails, metal wire stitches or any other adhesive substance, so there is no difficulty in sorting or sifting out materials for recycling. Such pallets are environmentally friendly and easily recycled, as biodegradable materials may be used such as for example corrugated fibreboard, solid paperboard or any other suitable material. As in the known prior art a pallet embodying the invention may be space-saving and be easily transported and distributed, as such a pallet may be delivered as a flat corrugated fibreboard or solid paperboard. These materials are also very light in weight so that tremendous saving can be achieved in the cost of transportation or distribution especially when using airfreight cargo. Such a pallet may also be variable in size and yet have the configuration of a conventional pallet so that lifting and moving the pallet with cargo can be done by an ordinary forklift truck, thus avoiding unnecessary modification on the forklift truck. Unlike some conventional pallets which have nine legs, the number of legs in the present invention can be varied according to the size of the pallet. The present invention can be coated or impregnated with wax or chemical in order to make it water resistant. The present invention will become more fully understood from the detailed description given hereinbelow, by way of examples of the preferred embodiment of a paper pallet made in accordance with the present invention. Reference will be made to the accompanying drawings in which; Fig. 1 shows an assembled paper pallet of the present invention; Fig. 2 illustrates an exploded view of the support and securing means; Fig. 3 shows an assembled paper pallet with side walls; Fig. 4a shows a plan view of cut lines and crease lines to form one of the tongues of the upper sheet; Fig. 4b shows cut lines and crease lines to form one of the tongues of the lower sheet; Figs. 5a & 5b show an alternative cutting arrangement for the tongues of the upper and lower sheets; Fig. 6 shows a reinforcement core placed inside the support and securing means; Fig. 7 shows an exploded view of an alternative arrangement for a reinforcement element for the support and securing means; Figs. 8a & 8b show in detail a plan view of the tongues 35 & 37 of an alternative embodiment; and Fig. 9 shows the assembled alternative embodiment of the present invention with the reinforcement cores being disposed outside the support and securing means. Referring to Fig. 1, & 2, the pallet of the present invention mainly comprises a first sheet 10, a second sheet 20 and support means 30. The said support means 30 are formed by cutting, creasing and folding parts of the first sheet 10 namely the tongue 35 and second sheet 20 namely the tongue 37 and the said tongues 35, 37 are secured by a simple "slot in" locking means. The first sheet's tongue 35 is folded downward (as viewed) at the crease line 38 perpendicular to the said first sheet 10, and the second sheet's tongue 37 is folded upward (as viewed) at the crease line 38 perpendicular to said second sheet 20. Thus the two tongues 35 and 37 will be assembled in an erected mode to form the said support means 30. The first sheet 10 and second sheet 20 surfaces are flat so as to properly place and support the cargoes which are to be transported in an easy and safe manner. Fig. 2 shows an exploded view of one of the support means 30 with the "slot in" locking means. The locking means may comprise securing means comprising an extended flange 32 which is part of the tongue 37 and is secured to the slots 34 to form a simple yet perfect "slot in" locking means. When all the flanges 32 of the tongues 37 are secured to the slots 34 of the tongues 35 the latter will form the said support means 30 which will stand firmly and hence provide substantially better support and rigidity to the cargoes which will be placed on top of the said paper pallet. The first sheet 10 may also be extended on all four edges so that it can be folded up to form side walls 12 as illustrated in Fig. 3. The corners of the side walls 12 are secured to each other by a suitable method. The side walls 12 protect the cargoes from sliding down from the pallet. Referring to Figs. 1, 4a, 4b, 5a & 5b, the height (h) of the pallets embodying the invention may be determined by the length of the cut line 39 which may be the same length for all the tongues 35, 37 of the first and second sheets 10, 20. The tongue 35 of the first sheet 10 may be cut perpendicularly to the tongue 37 of the second sheet 20. There may be two slots or notches 34 residing in the body 31 of the tongue 35 of the first sheet 10. There may also be a plurality of fingers 31a, having openings 33 between them. The width of the opening 33 of the tongue 35 may be slightly bigger than the thickness of the second sheet 20 and vice versa, so that a relatively perfect fit can be achieved when inserting the two together. The length (x) of the slots 34 may be slightly shorter than the length (y) of the flanges 32. therefore when the flange 32 is inserted and secured to the slot 34 it will fit tightly and hence avoid the said flange 32 from coming out of the said slot 34. The length (z) of the openings 33 may be configured in such a way that when the flange 32 is inserted in the slot 34 the tongue 35 of the first sheet 10 touches the top surface of the second sheet 20 and the tongue 37 of the second sheet 20 touches the bottom surface of the upper sheet 10. In order to facilitate inserting and securing the flanges 32 to the slots 34, the openings 33 of the first sheet's tongue 35 may be aligned to that of the second sheet's tongue 37 perpendicular to each other and then pushed all the way through the body 31 so that the flange 32 will intersect with the slot 34 at a 90 degree angle, the flange 32 may then be secured tightly to the slot 34. The openings 33 may have rounded edges in order to help with a smooth insertion. All the tongues 35, 37 of the same pallet may have the same design and configuration respectively , however it will be appreciated that they need not be in the same direction as long as the tongues 35, 37 are substantially perpendicular to each other, and therefore the same description and procedure as above can be applied to form a secure support means 30. Thus, it will be understood that to erect a pallet from the parts referred to, when the flange 32 is forced through the body 31 of the tongues 35 into slots 34, the slot 34 will catch the flange 32 and body 31 will prevent flange 32 from reversing and thereby securing and complete the "lock-in" process. The construction of paper pallets can also be made by reversing or exchanging the said first sheet 10 with the second sheet 20 or vice versa. In addition, the support means 30 can also be configured and designed with several different cuts on the parts of the first sheet 10 and the second sheet 20 comprising the tongues 35, 37. For instance two alternative cutting arrangements are shown in Figs. 4a, 4b to Figs. 5a, 5b, where the arrangement of the tongues 35, 37 can be either opposite or in series with each other. The said support means 30 are substantially hollow, therefore in order to provide further reinforcement to the present invention, if necessary, a reinforcement core 36 may be placed in some or all of the support means 30. The said reinforcement core 36 can be of any suitable shape (i.e. cylindrical, cube block etc.) and can be made of corrugated fibreboard, solid paperboard, multiple layers of paper material wound together either spirally or flat or any other paper material. The size and height of the said reinforcement core 36 may advantageously correspond respectively to the said hollow space inside the said support means 30 so that the said reinforcement core 36 gives extra support to the said pallet so as not to wobble inside the said support means 30. Figure 6 illustrates the exploded view of the said support means 30 with an example of a reinforcement core 36 placed within. Referring to Figs. 7, 8 and 9 there is illustrated an alternative embodiment of the present invention which can also be constructed by having only one "slot in" locking means for each of the said support means 30. Thus in this embodiment each of the support means 30 has only one pair of tongues 35, 37, that is the top tongue 35 cut out from the first sheet 10 which consists of a slot 34 and opening 33, and the bottom tongue 37 cut out from the second sheet 20 which consists of a flange 32 and opening 33. The tongues 35, 37 may be cut perpendicularly to each other so that the flange 32 and the slot 34 will intersect each other at a 90 degree angle. For this alternative embodiment the fastened tongues 35, 37 may be placed inside the said reinforcement core 36 to form the support means 30 as illustrated in Figs. 7 and 9. The procedure for fastening the flange 32 and the slot 34 is the same as mentioned above in the preferred embodiment.

Claims: A pallet comprising first and second sheet members (10, 20) and a plurality of support means (30) arranged between the first and second sheet members (10, 20) to hold the first and second sheet members (10, 20) together in spaced parallel relation, the support means (30) being formed by hinged tongues (35, 37) integral with the first and second sheet members (10, 20) and having openings (33) that extend from the free ends of the tongues (35, 37) towards the hinges (38), the tongues (35) on the first sheet member (10) intersecting at right angles with the tongues (37) on the second sheet members (20), characterised in that on at least some of the tongues (35, 37) a slot (34) is located between the end of the opening (33) and the hinge (38), and the openings (33) on those tongues (35, 37) intersecting with tongues (35, 37) with slots (34) have a flange (32) extending into the opening (33) to form a constricted portion of the opening (33), said flange (32) being capable of being received in the slot (34) to lock the tongues (35, 37) together. A pallet according to Claim 1, wherein the tongues (35, 37) each have a single opening (33). A pallet according to Claim 1 or Claim 2, including a plurality of reinforcing members (36) each comprising a tubular member surrounding a support means (30). A pallet according to Claim 1, wherein the tongues (35, 37) each have a pair of openings (33) and are arranged such that each support means (30) is formed by a pair of parallel tongues (35) on first sheet (10) intersecting with a pair of parallel tongues (37) on second sheet (20) such that the support means (30) formed thereby encloses a rectangular space. A pallet according to Claim 4, including a plurality of reinforcing members (36) said reinforcing members (36) being received in the rectangular space enclosed within each support means (30). A pallet according to any preceding claim, wherein the sheet members are of corrugated fiberboard or paper board having a water resistant coating. A kit comprising, in unassembled form, the first sheet member (10) and the second sheet member (20) of a pallet according to Claim 1. A kit according to Claim 7, wherein the tongues (35, 37) lie flat in the plane of the sheet members (10, 20).

Inventors: CHOW PAK LIM, CHOW, PAK LIM
Applicants: CHOW PAK LIM, CHOW, PAK LIM
Application year: 1993
Main classification: B65D19
IPC codes: B65D19