Reusable stackable tray for cans

Abstract: A reusable stackable tray (20) for cans being formed by a rectangular wall structure, a web-like floor structure (34) secured to and extending down from the wall structure and a plurality of spaced redoubt floor members (56) spaced on and about and extending down from the bottom surface of the floor structure. Each of the redoubt floor members has a bevelled bottom edge perimeter such that a tray filled with cans can, without being lifted, be slidingly pulled and pivoted on the redoubt floor members directly on top of a layer of cans in another tray beneath it.

Description: The present invention relates to trays for transporting and storing containers such as beverage containers, and more particularly for those storing two or more six-packs of pull-top aluminium cans. It further relates to such trays which can be securely stacked one on top of another both when full and when empty. Pull-top aluminium cans for soft drinks, other beverages and the like are stored and transported during the distribution stage typically in short-walled cardboard trays or in cardboard boxes. On the other hand as to bottles, because of the ever increasing cost in disposable tertiary packaging, returnable, reusable containers are becoming popular for the storage and handling of bottles. However, unlike plastic or glass bottles which have rounded edges on their crown or top, pull-top aluminium cans have square sharp corners (as compared with bottle tops) where the top of the can attaches to the sides thereof. Therefore, particular difficulties have been encountered in the stacking and manipulating of the trays of cans stacked relative to one another. In fact, there are no known returnable, reusable trays suitable for supporting pull-top aluminium cans and which can, when filled with such cans, be stacked securely one on top of another, so that the top tray of a stack of filled trays can be easily pulled off and along the stack without being lifted. In other words, the trays should be constructed so that when loaded they can be easily pivoted and slid off of loaded trays beneath them without having to be lifted. GB 1152038 discloses a bottle case which displays these problems in that it comprises a base having circular indentations defined by an inclined surface, for locating the tops of bottles in a subjacent crate. These indentations serve to prevent sliding movement between stacked crates. Accordingly, it is a principal object of the present invention to provide a returnable and reusable tray for storing and transporting cans. It is a further object of the present invention to provide a returnable plastic tray adapted to accommodate and support therein twenty-four twelve ounce pull-top aluminium cans. It is a still further object of the present invention to provide a returnable tray, particularly adapted for cans having square sharp top corners, which when full can be pulled and pivoted, without being lifted, on and along a top surface of another layer of such cans. Another object of the present invention is to provide a novel, sturdy, reusable tray for storing and handling containers, and such tray having a webbed floor design which is interesting and aesthetically pleasing. A further object of the present invention is to provide a sturdy reusable tray for supporting, storing and transporting beverage containers which tray is lightweight and thus can be easily manipulated and carried, and which can also be economically constructed. Directed to achieving these objects, a unique stackable, reusable tray in accordance with attached claim 1 is provided especially designed for stacking and storing cans having sharp top edges. The tray has amongst other things, protuberance means comprising a plurality of spaced,island protuberance members. The protuberance members have their bottom perimeters defining edges bevelled preferably at an angle of approximately twenty-five degrees plus or minus five degrees relative to the rest of the floor structure. The bottom surfaces of the protuberance members thereby are configured so that a full tray can be easily slid and pivoted on the top of a layer of aluminium cans directly beneath it. An embodiment of the present invention will now be described in conjunction with the accompanying drawings. Figure 1 is a top perspective view of a reusable stackable tray for cans of the present invention. Figure 2 is is a perspective view of the tray of Figure 1 when upside down. Figure 3a is a top plan view of the tray of Figure 1. Figure 3b is a view similar to that of Figure 3a illustrating a variation on the design of the tray of Figure 1. Figure 4 is is a bottom plan view of the tray of Figure 1. Figure 5 is an end elevational view of the tray of Figure 1. Figure 6 is a side elevational view of the tray of Figure 1. Figure 7 is a fragmentary cross-sectional view of a side (or end) of a pair of empty trays of Figure 1 showing their interlocking nesting arrangement. Figure 8 is a cross-sectional view of a portion of the tray of Figure 1 when loaded, locked and supported on a similar said loaded tray. Figure 9 is a view similar to that of Figure 8 showing the trays thereof in a lock broken and sliding relation. Figure 10 is an enlarged cross-sectional view taken along line 10-10 in Figure 3a. Referring to the drawings a reusable, stackable tray for cans is illustrated generally at 20, and is formed by a unitary integral plastic construction. It comprises a pair of end walls 22, 24, and a pair of opposed side walls 26, 28 wherein the end and side walls are integrally joined to form four rounded corners as shown for example at 30. As seen, the end and side walls 22, 24, 26, 28 form a rectangular structure shown generally at 32. A floor structure designated generally by reference numeral 34 is positioned within and secured to the base of the rectangular structure 32. The perimeter structure 36 of the floor structure 34 has its outer surfaces 37 spaced inward about the entire perimeter thereof inside of the inside surface 38 of the rectangular structure 34 to thereby provide a stepped-in design. This allows one tray 20 to be stacked and nested securely, but removably, within another similar or identical empty tray 20' and thereby resist relative lateral movement as to the surface 38' of the rectangular structure 34'. This nesting relation is best illustrated in Figure 7. The floor structure 34, as seen in the drawings, defines a web-like construction which minimizes the use of the plastic material thereby making the tray 20 lighter and easier to handle and also reducing the amount of the plastic construction material required. It further presents a pleasing and interesting design. The central dividing struts 42, 44 thereof extending, respectively, between the centers of the opposed side walls 26, 28 and the centers of the opposed end walls 22, 24 divide the floor structure 34 into four equal cells shown generally at 46, 48, 50 and 52, and aid in manufacturing by providing flow channels for the plastic material from the point of injection at the part center to the walls. Each cell then represents the storage space for an interconnected six-pack of beverage cans, and includes six spaced circular members such as shown by 54 in two-by-three arrays. Spaced downward projections or redoubt members such as shown by 56 are positioned in the middle of four adjacent circular members 54. Members 56 are referred to as downward projections because they project downwardly from the bottom or outer surface of floor structure 34, as explained below. A plurality of struts such as shown generally at 58 then interconnects the circular members 54, the redoubt members 56, and the floor perimeter structure 36. The struts 58 comprise lateral struts such as shown by 60 which directly connect laterally adjacent circular members 54, longitudinal struts such as shown at 62 which directly connect longitudinally adjacent circular members 54, and radial struts such as shown at 64 which directly connect the sides of the redoubt members 56 to the circular members 54. For the redoubt members 56 positioned within the cells 46, 48, 50 or 52, radial struts 64 extend therethrough, as shown in Figure 3a, for example. In another and perhaps more preferred design, the radial struts 64 do not extend through the redoubt members, as illustrated in Figure 3b. Similarly, the dividing struts 42, 44 extend through the redoubt members 56 positioned between adjacent cells 46, 48, 50 or 52. Partial side and end engaging redoubt members such as shown at 66, 68, respectively, are positioned spaced along the floor perimeter structure 34, and are shown in elevation in Figures 5 and 6. These partial side and end engaging redoubt members 66, 68 have lateral or longitudinal redoubt struts 70, 72, respectively, extending through them as shown. Additionally, the corners such as shown at 74 of the floor perimeter structure 34 are rounded and have corner engaging redoubt members thereat such as shown at 76. The top of each of the struts 58, redoubt members 56, and circular members 54 all have their upper surfaces defining a smooth upper plane illustrated generally at 78 on which beverage cans can be positioned, supported and easily slid along without obstruction for inserting the cans into the tray 20 and removing them from it. A plurality of spaced reinforcing posts such as shown at 79, interconnect the floor structure 34 with the rectangular structure 32 by engaging the top of adjacent lateral or longitudinal struts 60, 62 and extending up and secured to the inside surface 38 of the rectangular structure 32. The redoubt members 56 are each formed by a continuous upright wall 80 and a redoubt floor 82 secured at the bottom end thereof, as best shown in Figure 10. The redoubt walls 80 are configured in a square-like shape having rounded corners 83 and with the middles 84 of each of the sides thereof (where the radial struts 64 engage) being curved inwardly a slight amount. The bottom surfaces of the redoubt walls 81 lie generally in the plane of the bottom surfaces of the struts 58, the floor perimeter structure 36 and the circular members 54. The redoubt floor 82, however, extends below that plane. The redoubt floor 82 has about its entire bottom perimeter a bevelled edge 85 which is formed at an angle 86 of, for example, twenty-five degrees plus or minus five degrees relative to the bottom plane of the rest of the floor structure 36. This angle is appropriate for the current material and market can design. However, this angle would be adjusted as needed to accommodate different materials and can designs. These small, permanent, spaced redoubt members 56 assist the trays 20 when full to stack securely upon layers of cans 88 beneath them, as shown in Figure 8. The cans 88 are those such as described earlier herein and have square sharp top corners 90. They also allow the tray 20 to be twisted or pivoted slightly while stacked on a similar layer of cans 88 therebeneath and then slid easily off of the loaded tray beneath it. This motion is best illustrated in Figure 9. This allows a delivery driver, for example, to pull off the top tray 20 of any tall stack without having to lift that top tray. In other words, a loaded tray 20 can be easily slid off the loaded tray directly beneath it. These redoubt members 56 are also spaced evenly relative to one another to conform to a twenty-four can configuration. It is also within the scope of this invention for tray 20 to be configured and proportioned differently as needed to accommodate different numbers, sizes and arrangements of containers. From the foregoing detailed dscription, it will be evident that there are a number of changes, adaptations, and modifications of the present invention which come within the province of those skilled in the art. However, it is intended that all such variations not departing from the spirit of the invention be considered as within the scope thereof as limited solely by the claims appended hereto.

Claims: A can tray (20) comprising: floor structure (34) having a floor bottom; and wall structure (32) connected to and extending up from said floor structure; characterised by protuberance means (56, 66, 68) for locking the tray when loaded on a layer of rimmed cans therebeneath in a locked position wherein free sliding on the layer is blocked and for unlocking the locked and loaded tray by twisting the loaded tray a slight amount about a generally vertical axis to an unlocked position wherein the loaded tray, with no significant lifting thereof, can be slid on the layer of rimmed cans therebeneath; wherein said protuberance means includes a plurality of spaced, island protuberance members, each having a bevelled edge perimeter, secured to and depending down from said floor bottom and on which the loaded tray when in the unlocked position can slide on the rims of the cans therebeneath. The can tray of claim 1 wherein said protuberance members (56, 66, 68) are positioned between adjacent rimmed cans in the layer therebeneath when the loaded tray is in the locked position. The can tray of claim 1 or 2 wherein said floor structure includes a plurality of struts (44, 62, 64, 70, 72) connected to said protuberance members. The can tray of claim 3 wherein said floor structure include a plurality of spaced circular members (54) spaced from said protuberance members and connected thereto by said struts. The can tray of any preceding claim wherein said bevelled edge perimeter extends down at an angle of twenty-five plus or minus five degrees. The can tray of any preceding claim, wherein said floor is formed by moulding polyethylene.

Inventors: APPS WILLIAM P, LANG-REE ARNE, APPS, WILLIAM P., LANG-REE, ARNE
Applicants: REHRIG PACIFIC CO, REHRIG PACIFIC COMPANY INC.
Application year: 1989
Main classification: B65D71
IPC codes: B65D71