BOTTLED WATER SHIPPING RACK

Abstract: A stackable crate (Fig. 1) and a modular rack system (Fig. 8) for horizontally retaining large bottles. The individual crates may be adapted to retain multiple bottles held in various configurations. The crates are designed to provide stability when stacked on top of one another to form a modular rack (Fig. 8). The individual crates (Fig. 1) include an alignment feature (13, 26), and a locking feature (23, 11) which also provides for sliding one stacked crate over another.

Description: - 1 - BOTTLED WATER SHIPPING RACK FIELD OF THE INVENTION This invention relates in general to rack systems for supporting large bottles used in the bottled water industry and, more particularly, to a modular rack system for containing and supporting such bottles. BACKGROUND OF THE INVENTION Two known devices are commonly used for supporting large bottles, such as a five gallon water bottle, a three gallon square water bottle, or a three gallon round water bottle, typically used in the drinking water industry. These two devices are a crate and a metal rack. A crate is essentially a square wooden or molded plastic container adapted to contain one bottle. Crates are adapted to be stacked upon one another to allow transport and handling of a plurality of bottles. To stabilize a stack of crates, however, the stack must be wrapped with shrink-wrap plastic. After transport of the stacked crates, in, for example, a delivery van, a worker must individually lift and unload each of the full crates to remove the bottles for delivery. This adds significant labor time and provides a higher risk for injury, especially wrist and back injuries, and injuries from falling crates. During transport, crates expose the bottle caps allowing caps to hit other crates which causes leaking. Most crate systems transport the bottle in the crate into the clean, filler room. This contaminates the clean room, as simple crate washers cannot fully remove all contaminants. The additional weight of the crates causes additional wear and tear on transport equipment. Metal racks are fixed in size and shape. After unloading the bottles from a delivery or transport truck using metal racks, the truck must return with the empty bottles held by the same metal rack that was used to deliver the bottles. The metal rack cannot be collapsed or rearranged to a more efficient shape. This means that the same number of vehicles must be used to transport racks full of empty bottles as racks of full bottles between the source and the distributor. In addition, metal rusts and tends to rapidly corrode when exposed to the ozone used in many water purification processes, and the metal racks, which are fixed in WO 99/44900 _ _\ _ PCT/US99/04507 size and shape, can cause damage to the interior walls and flooring of a transport or delivery vehicle. SUMMARY OF THE INVENTION The present invention is embodied in a stackable crate, comprising a top portion defining an upper plane having four corners, a bottom portion defining a lower plane having four corners, two opposite end portions forming a front and a rear, a distance between the front and rear defining a length, and two opposite side portions. The stackable crate includes at least one hollow retaining member for holding a plurality of bottles. The retaining member includes a retaining wall having an inner surface, an outer surface and includes a plurality of supporting beams connected to the outer surface of the retaining wall. The beams extend to top portion or the bottom portion to provide support. A front opening is formed on the front of the crate for loading and unloading bottles. A peripheral wall extends generally from the upper plane to the lower plane and includes a plurality of vertical support ribs protruding inwardly from and extending along the wall to provide strength points. The retaining member is positioned to retain the plurality of bottles in a horizontal orientation and along a common axis. The present invention includes an alignment system with alignment ribs extending diagonally inward from the corners of the crate, both on the top and bottom of the crate. The present invention also includes a locking mechanism to lock the units into place on top of one another. The locking mechanism includes projections from the top of a unit which fit into a cavity formed in the bottom of a unit stacked on top. The present invention also includes a sliding mechanism, which allows one stacked unit to slide over the upward projections which form the locking mechanism of a subjacent unit. DETAILED DESCRIPTION The present invention is embodied in a plastic modular rack having a plurality of stackable individual units that may hold one, two, three, four, or other numbers of bottles in a number of configurations. One example of unit construction holds four bottles, two wide and two deep. The units are stackable and are designed to provide mechanical stability when stacked as high as ten units. The racks are modular and may be custom fit to any number of bottles wide or high, for example, five bottles high as is the industry standard. The present invention provides for better utilization of space in storage or transport systems, as the number of racks stacked may be varied. For example, in a delivery truck where stacks of 5 units high may be the standard, a shortened stack of 3 units high may be used over the wheelwell. This invention provides significant improvements over one additionally known stackable plastic tray product (such as the Aqua-Caddie available from Jeco Plastic Products of Plainfield, Indiana). The Aqua-Caddie has four contact points for mating the stackable trays. Its disadvantages include that it is too big and heavy for easy manual loading, requiring a forklift to be used. The forklift may damage the bottles because of the lack of clearance between the top of the retained bottle and the lifting surface. The height of each unit is considerably greater than that of the bottles they retain, so that stacking the units is not an efficient use of vertical space. Additionally, the trays cannot easily slide over one another and it is difficult to use this product with the automated equipment that is typically used in the bottled water industry. The Aqua-Caddie is typically blow-molded or rotation molded, methods which use open cavity molds that preclude the addition of openings through solid features to serve as drainage features. This invention provides significant improvements in safety and ergonomics. The units are designed to slide over and off one another, rather than having to be lifted, thereby helping to prevent injury to users due to lifting - a bottle and crate typically weighs 50 pounds. Because they may be two bottles wide, the stacks are also more stable than the crate stacks, and do not require the use of shrink-wrap to enhance stability. The units may be made to snap together to enhance stability. The interlocks and wide footprint also enhance stability, and thus the safety of the stack. The individual units can be pulled off by means of the sliding mechanism and stacked on a dolly, thereby promoting ease of handling. Alternatively, a number of individual units may be fastened together to form a larger rack system, which can be easily disassembled or reconfigured, and therefore offers an advantage over a fixed metal rack system. Metal or other strapping means may be used to fasten the stacked units together. The molding may include bosses, or openings through which a metal rod may be inserted to secure the units together. The present invention offers the advantage of flexibility as to method of production, and material of construction. Each unit may be molded in one integral piece or in two or more pieces adapted to snap or otherwise be fastened together. Any kind of molding procedure is suitable for this fabrication. The molding may be done from the top or from the side. The unit may be molded, for example, using structural foam. It may be molded using injection molding techniques such as gas assisted injection molding or reaction injection molding. Alternatively, it may be molded using compression molding, structural web molding or vacuum forming. The preferred material of construction may be polyethylene, but polypropylene or resins including engineering resins may be used. Additionally, the present invention may be rotationally molded, or blow molded, although embodiments molded using these methods would lack some of the features described hereinafter. Another advantage associated with the method of construction of the present invention is the relative ease of maintaining a set of tight dimensional tolerances in the manufacture of a plastic modular rack unit. In comparison, it is much more difficult to manufacture a metal rack system to the same set of tolerances. With the units of the modular rack system manufactured to a tighter set of tolerances, the automated equipment used in stacking the units, and in loading, and unloading bottles, runs more efficiently. Alternatively, each unit may be molded in two equal pieces which lock together, and which utilize the alignment feature to secure the units into position. Each unit may be made to house two or more bottles and the completed, stacked unit may be of any suitable width, height, and depth. Typically, the bottled water industry uses stacks of four bottles wide, five bottles high, and two bottles deep. Stacks of three bottles wide, five bottles high, and two bottles deep are also used. The modular units of this invention may be made to comport with any of these or other desired dimensions. For the 4x5x2 construction commonly used in the bottled water industry, two 2x2 units, each holding four 5 gallon bottles, may be used side by side and then stacked five high, one upon the other. Each 2x2 unit may include two hollow retaining members, side by side, whereby each retaining member is sized to hold two bottles held along a common axis. To retain and allow for easy insertion and removal of the 5 gallon bottles commonly used in the bottled water industry, a cylinder with a diameter of 10.95 inches may be used to retain the bottles. For 3x5x2 construction, each unit can be three bottles wide and two bottles deep and adapted to be stacked five high. The units are desirably configured to fit on industry standard pallets. Ideally, a 40" x 48" or 36" x 40" footprint is desirable to allow the units to be loaded and stacked onto industry standard pallets inserted and transported in a delivery or transport truck. Alternatively, a single 2 x 2 unit may be stacked upon a 24" x 40" pallet which is also commercially available. Ergonomically, the empty crates may be easily arranged, reconfigured, and restacked to maximize space usage in delivery or transport vehicles. In this manner, less floor area is used transporting empty racks than full ones, thereby requiring fewer vehicles and related expenses in transporting empty racks from the distributor to the source. The plastic modular rack was conceived with the primary objective to combine the positive factors of both plastic crates and metal racks into a system superior to both. The stability of the modular rack allows current crate users to eliminate the need to stretch wrap outgoing loads, which eliminates the considerable expenses associated with the equipment, labor and materials required by the stretch wrapping process. In addition, the labor required to stack 16 crates, for example, and then stretch wrap them is reduced to simply stacking four plastic modules. This may be done even faster with the aid of an available forklift/lateral clamp attachment. By allowing full access to all the bottles on the truck, the modular rack eliminates the need to individually unload each crate, therefore reducing bottle unloading time by an average of 30 percent per stop. The crate user enjoys the identical return pay load benefit of crates, as the plastic modular rack may be stacked seven high for the return trip to the bottling plant. The bottles may be easily unloaded from the units by use of automated unloading equipment. The time associated with removing the shrink wrap, is eliminated. Without the crates, the bottles are transported into the clean room by themselves, which reduces filler room contamination. This also allows for a smaller filler to be used, and reduces the wear and tear on conveyors and drive motors. Yet another advantage of the modular rack system is that the use of plastic pallets with the modular rack will reduce production line downtime caused by splintered pallets or crates, and help maintain the clean environment necessary in the bottling plant. Metal rack users, if they switch to modular racks according to the present invention, are able to utilize all available space on return transport, providing freight savings of up to 30 percent. Ongoing labor expenses for repair of metal racks are also avoided using the present invention. This eliminates downtime in automated equipment from deformed metal racks. Plastic racks require less ongoing repair time. The racks or pallets, if damaged, can be removed, quickly replaced and the system immediately returned to service. The damaged part can then be easily recycled. The price of the modular rack may be comparable to that for metal racks. The weight of plastic racks may be less, saving on fuel and allowing a higher outgoing payload on transports. Plastic racks will not damage the flooring or interior walls of the delivery or transport vehicle. Transport space will be more fully utilized, as the modular racks can be stacked very high (for example 7 as typical in the industry for return loads) increasing payload in transports by up to 30%. The plastic modular rack system also enhances plant appearance. Plastic does not rust as does metal. Unsightly rusting metal racks, scraps of stretch wrap, and the wood pallets used for stacking stretch wrapped crates, are eliminated. The racks rarely leave the delivery vehicle, except when returned to the plant or distribution center, and are less attractive for uses outside the bottling industry. Thus, losses due to theft are reduced. The plastic modular rack provides major reductions in both production and distribution costs as well as labor saving compared to the crate or metal rack users. In the plant, the present Plastic Modular rack system invention offers the following advantages over crates. Crates require both a depalletizer at the start of the line and a palletizer at the end of the production line. If either machine fails, production cannot continue. The modular rack requires only a single stacker /unstacker. Racks will be completely stacked at the beginning of the production line, as received with empty bottles. In the event that the stacker /unstacker malfunctions, the racks may be manually staged and loaded on the production line, allowing production to continue. The present invention can be best understood through a detailed description of an exemplary embodiment depicted in the following drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an exemplary embodiment of a single unit in the rack system of this invention. FIG. 1A is a perspective view of a corner depicting the upper alignment feature of the invention. FIG. 2 is a perspective view showing the bottom of the unit. FIG. 3 is a perspective view from the top, rear of a unit. FIG. 4 is a front view of the exemplary unit. FIG. 5 is a top view of the exemplary unit. FIG. 6 is a bottom view of the exemplary unit. FIG. 7 is a side view of the exemplary unit. FIG. 8 shows an exemplary stacked model of several units on a pallet. FIG. 9 is a perspective view of detachable alignment units attached to a pallet. FIG. 10 is a top view of a pallet with detachable alignment units. FIG. 11 is a perspective view of a pallet with one unit loaded onto the pallet and aligned onto a detachable alignment unit. FIG. 12 is a side elevation view of a pallet with one unit loaded onto the pallet and aligned onto detachable alignment units. FIG. 13 is a perspective view of a detachable alignment unit. FIG. 14 is a perspective view of a pallet with one unit loaded onto the pallet and aligned using an alternative embodiment of a flat detachable alignment unit. FIG. 15 illustrates an alternative embodiment of a detachable alignment unit. FIG. 16 is a perspective view of a pallet having a friction pad as an upper surface. FIG. 17 is a perspective view of a pallet with a retaining curb on its upper surface. FIG. 18 is a perspective view of a pallet with an alternate embodiment of a retaining curb on its upper surface. FIG. 19 is a perspective view of the lower portion of a unit molded as two separate pieces. DETAILED DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an exemplary embodiment of a single unit in the rack system of this invention. This unit is adapted to hold four bottles, two wide and two deep. The bottles are contained in hollow retaining members 10. In the exemplary embodiment illustrated in FIG. 1, the hollow retaining members comprise cylinders. The crate consists of an upper portion 86 and a lower portion 87. A peripheral wall 89 extends around the periphery of the crate. The crate includes a front 90 and a rear 91, and two opposed sides 92 and 93. The top of the crate unit defines an upper plane 73 and the bottom of the unit defines a lower plane 74. The top and bottom each have four corners 16. The top of the unit has raised portions 11 which include an upper rib 70 and ramps 12. The upper rib 70 is defined by a length 71, and includes an outer surface 52. This raised portion allows a unit stacked on top of the illustrated unit to lock into place and also allows for the upper stacked unit to slide on and off, into and out of position. The ramps 12 allow for a corresponding locking feature on the bottom of a unit (as depicted in FIG. 2) to slide over the rib 70 and lock into place over raised portion 11. In an alternative embodiment, ramps 12 may take on a slightly different configuration (as described in conjunction with FIG. 3), but still provide the sliding feature as above. Support beams 85 extend from the hollow retaining member 10 to the upper plane 73 to provide support for a unit stacked on top. In a preferred embodiment, bosses (not pictured) may project from support beams 85 to form a stacking feature. Openings 14 may be provided in each of the hollow retaining members 10 through which bumper pins (not shown) may be inserted to help hold the bottles in place. The bumper pins may be made of a polypropylene fleximer (or other suitable material) with a higher coefficient of friction than the material from which each unit is made. Larger openings 22 may be provided to allow for drainage and to form handles which may be used to move the modular racks. Windows 21 allow for the viewing of the bottles retained within the crate and reduce the weight of the crate. The circled portion A of FIG. 1 is illustrated in more detail in FIG. 1A. As shown in FIG. 1 A, the corners 16 on the top portion of each unit may include a sloped, raised alignment rib 13 which allows alignment with a mating rib of the corresponding lower section of a stacked unit. In addition, the alignment rib 13 allows locking of the mating portion, and facilitates the sliding feature by which allows empty units to be easily removed from a stack, as described above. Ribs 13 are flat and level with the upper surface of the unit at their outer ends, then slope upward (13A) and level off (13B) at a height above that of the upper section of the unit, at their inside edges. The ribs 13 provide strength points and assist in locking the stacked units into place. Vertical ribs 27 which line the inner vertical walls, provide additional contact/ strength points and prevent jamming of a crate with a crate stacked above or below it. Drainage slits 28 may also be used to connect stacked units together through the use of a strapping means. Typically, the bottled water industry uses stacks of four bottles wide, five bottles high, and two bottles deep. The modular units of this invention may be made to comport with these or other desired configurations. For example, with the 4x5x2 construction, two 2x2 units, as shown in FIG. 1, may be used side by side and then stacked five high, one upon the other. FIG. 2 is a perspective view showing the bottom of the embodiment depicted in FIG. 1. Support beams 85 extend from the hollow retaining member 10 to the lower plane 74 to provide support for the hollow retaining member. The bottom of the unit has a recessed longitudinal cavity 20 and a locking rib 23 at either end of the recessed longitudinal cavity. Longitudinal ribs 48 and 49 form the sides of recessed longitudinal cavity 20 and extend along the lower plane 74. The locking rib 23 has an inner surface 51. The depth 72 of the cavity is the distance between the lowermost feature within the cavity and the lower plane 74. The depth of indentation 75 represents the distance between the locking rib 23 and the lower plane 74, and is less than the cavity depth 72. The locking ribs 23 are adapted to interlock with raised portions 11 (shown in FIG. 1) of a unit onto which the unit in FIG. 2 is mounted, or alternatively a locking feature mounted on a pallet. Once the locking rib 23 clears the corresponding raised portion 11 of a subjacent crate, the raised portion 11 becomes nested within the longitudinal cavity 20 so that the outer surface 52 of the raised portion 11 is in close proximity to the inner surface 51 of the locking rib so as to lock the units into position. The surfaces 51 and 52 may be incidentally in contact with one another, but do not form a tight fit so as to jam the units together and to prevent unstacking. For the sliding mechanism, once the locking rib 23 clears the corresponding raised portion 11 , the recessed longitudinal cavity 20 provides the slide-off feature wherein each unit can slide easily with respect a stacked unit because of the graduated grooves within the recessed longitudinal cavities. The ramps 12 allow the locking rib 23 to slide easily over the opposite raised portion 11. The sliding feature works in either direction, so that racks may slide either forward or backwards. The stacking of the units is also referred to as "rendering" in the art. In an alternative embodiment, the central sliding and interlocking feature (the raised portions 11 and corresponding locking ribs 23) may be asymmetrical to prevent mis-stacking of racks. The bottom of the may unit also contain recessed alignment ribs 26 to cooperate with the alignment ribs 13 of a subjacent crate. Recessed alignment ribs 26 are flat and level with the lower surface of the unit at their outer ends, then slope upwards 26A and level off at a level above that of the bottom surface of the unit, providing an indentation portion 26B which corresponds to the raised portion of alignment rib 13 on the top of a unit to facilitate alignment upon stacking, and also to prevent jamming of one stacked crate into another in conjunction with the vertical ribs. In an alternative embodiment, the upper plane of the top of the unit may contain the recessed alignment ribs (26 in FIG. 2) with the bottom containing the raised alignment ribs (13 in FIG. 1A). In another alternative embodiment, the top of the unit may contain both raised and recessed alignment ribs, with the corresponding corner of the bottom of the unit containing the other of the two alignment ribs, so that, in each corner, a raised rib mates with a recessed rib to align the stacked units into place. In another alternative embodiment, less than four alignment ribs may be used. As few as one alignment rib, in conjunction with the locking feature, may be used to align the stacked units. It is seen that the alignment ribs can be used interchangeably, provided corresponding top and bottom corners use opposed ribs to align the stacked units. In yet another alternative embodiment, the alignment ribs are not included. In place of the set of cooperating raised and recessed alignment ribs, the corners of the units may alternatively include a diagonal, flat rib which is coplanar with its associated plane. These ribs (not shown) are substantially similar to upper alignment rib 13 as in FIG.1A, but are co-planar with the upper plane and do not contain a raised section above the plane. These ribs serve as strength points for the stacked units and prevent jamming of stacked units. Each unit preferably has sixteen strength points. Less material may be used in the construction of the units to make them light in weight, if so desired. The corners 16 of the unit include alignment ribs 13 and vertical ribs 27 which serve as strength points and prevent jamming. Therefore, if a unit is dropped, damage will be minimized, and the corners will not collapse. Each unit may have holes 24 on the top of space 10 which serve as handles that facilitate loading and unloading. Holes 24 are sized to allow a finger to extend through so as to grasp the unit. Additional smaller openings 17 on the top of spaces 10 also provide for drainage. FIG. 3 is a perspective view from the top, rear of the embodiment depicted in FIG. 1 and FIG. 2. It can be seen that the hollow retaining members 10 consists of a wall having an inner surface 97 and outer surface 98. Windows 21 are provided in the unit for viewing the bottle. These windows allow easy visual determination of whether the bottles have a cap, and hence whether the bottles are full or empty. The rear openings 25 are provided and sized to allow debris to be forced out of the unit when bottles are inserted, and also to allow the bottles to be pushed from the rear manually or with automated equipment to facilitate unloading. The bottom section of retaining members 10 are flush with the bottom portion of rear openings 25 so that small objects will not be retained within the retaining members 10. The sides of rear openings 25 form barriers which will not allow bottles to pass through. Ramps 12 provide for the sliding feature as discussed in conjunction with FIG. 1. In an alternative embodiment (not shown), the ramps may take on another configuration. In the alternative embodiment, junction 12B (shown in FIG. 3) is not included. Rather, ramp 12 includes a continuously sloped section extending from junction 12A to junction 12C in the alternative embodiment. The alternative embodiment still provides for the longitudinal sliding feature as discussed above, and also provides for a lateral stacking/sliding feature. A stackable unit, or a stack of units, may be grasped from the sides (opposed sides 92 and 93 as shown in FIG. l) by the automated equipment typically used within the industry. The ramp 12 as described for the alternative embodiment, allows for an upper unit to slide laterally over a subjacent unit, and to lock into place. When an upper unit is aligned to a subjacent unit, with respect to the front and rear of the units, it may be lowered onto the subjacent unit. If the upper unit is displaced laterally with respect to the lower unit, so long as longitudinal ribs 48 or 49 as shown in FIG. 2, contact upper rib 70 of the top of the subjacent crate, the units may be slid laterally with respect to one another. The units may be slid until upper rib 70 and raised portion 11 become nested within recessed longitudinal cavity 20, as described in conjunction with FIG. 2, to secure the units into place on top of one another. FIG. 4 is a front view of the exemplary unit showing the hollow retaining members 10 wherein the bottles are held. In this exemplary embodiment, the crates are sized to hold two bottles in each of two hollow retaining members 10. In a_preferred embodiment, the hollow retaining members 10 may be cylindrical and sized to retain standard sized 5 gallon bottles commonly used in the bottled water industry. In this preferred embodiment, a diameter of approximately 11 inches may be used to retain the bottles, while also allowing for easy insertion and removal of the industry standard bottles. The exemplary diameter may be in the range of 10.95 to 11.25 inches. Other embodiments may be configured to retain more or less bottles per retaining member and also may include more or fewer retaining members. In this exemplary embodiment, the bottles may be positioned with the top, cap end facing forward for easy removal. The projections of alignment ribs 13 are also depicted, indicating where the ribs 13 project above the top surface of the unit, to align with corresponding mating rib 26 which form recesses from the lower side of the unit stacked on top. The locking features described with reference to FIGs. 1, 1A, and 2, are located within upper longitudinal compartment 58 and the lower longitudinal compartment 59 formed within the upper portion 86 and lower portion 87 of the unit respectively, between the laterally disposed retaining members 10. FIG. 5 is a top view of the exemplary unit. A plurality of vertical ribs 27 line the inner vertical walls to provide additional contact/strength points. Openings 24 positioned at the apex of the hollow retaining members 10 may provide for handles. Slits 28 are positioned along the sides of the unit to allow for drainage and may also provide for stacked units to be strapped together. Metal or other strapping means may be used to secure stacked units together. FIG. 6 is a bottom view of the exemplary unit. The front 90 and the rear 91 are separated by a length 95. This bottom view shows the holes 22 which function as drain holes, and alternatively may be used as handles. Additional holes may be provided in the unit. Recessed lower alignment ribs 26 correspond to upper alignment ribs 13 (FIG. 4). Ribs 13 extend above the top of a stacked unit (not pictured) to mate with recessed ribs 26 to align the units. When the units are stacked, recessed ribs 26 are substantially in contact with ribs 13 extending from the top of a subjacent crate to provide strength points. FIG. 7 is a side view of the exemplary unit. Windows 21 provide a view of the loaded bottles. Alignment ribs 13 project upward from the corners. Raised portions 11, upper ribs 70, and ramps 12 provide the locking / alignment unit and allow for sliding one unit over another. FIG. 8 shows an exemplary stacked model in which nine of ten units have been assembled. In addition to the locking/alignment features of the exemplary embodiment, other alignment/locking means may be used. Bosses may be included to project upward from the top of a crate and the bottom of a crate may include receiving units to receive the bosses and secure a unit stacked on top of another. In a preferred embodiment, the bosses may project from support beams (feature 85 in FIG. 1) which form the upper plane 73. It may be understood by one of skill in the art that other suitable alignment/locking means may also be used. The present invention also contemplates the combination of the stacked modular unit and a molded pallet whereby the bottom unit in the rack system may be positioned on the pallet with the use of a detachable alignment unit affixed on top of the pallet. As illustrated in FIG. 9, the pallet 39 may have raised attachments 40 which serve as detachable alignment units onto which a unit may be aligned and stacked. Recessed longitudinal cavities 20 (FIG. 2) are configured to cooperate either with the locking rib 23 (FIG. 2) on the underside of each unit to lock the unit on to raised portion 11 (FIG. 1) of a subjacent unit or alternatively onto detachable alignment units 40 affixed to a pallet. The detachable alignment units 40 are adapted to align the units and incorporate the interlocking (and sliding) feature of this invention, and are positioned so that the units may be stacked in either direction on the pallets. FIG. 10 is a top view of the pallet with detachable alignment units 40 positioned on the pallet. FIG. 11 is a perspective view of such an exemplary pallet 39 with one unit loaded onto the pallet and locking onto detachable alignment unit 40. Note that an exemplary crate unit may be sized, and that the detachable alignment units 40 may be positioned so that the crate can retain two five gallon water bottles and fit on an industry standard pallet 39 whereby the rear of the unit 91 essentially lines up with the back of the pallet 46 and the front of the unit 90 does not extend fully to the front of the pallet 47, producing a foot 78 part of the pallet. In this manner, two industry standard water bottles 80 may be stacked in contact with one another, whereby the neck 79 of the front bottle protrudes slightly out of the front opening 99 of the crate and overhangs the foot 78, to prevent damaging the bottles. In this manner, no cap to crate contact occurs during transport. FIG. 12 is a side elevation view of the exemplary embodiment of the stackable crate on an exemplary pallet also depicted in FIG. 11. A stackable crate loaded onto the pallet is aligned with, and locked onto raised attachments 40. The neck 79 of the front bottle 80 protrudes slightly from the crate and overhangs the foot 78 of pallet 39. FIG. 13 is a perspective view of an exemplary embodiment of the detachable alignment unit 40 which may be secured to a pallet to position and lock the stackable crate unit into place onto the pallet. The detachable alignment units 40 include a base 60, a central rib 65, and a foot 57 on either side of the central rib. The foot 57 has a height 61 which is less than or equal to the depth of indentation 75 of the locking rib 23 as depicted in FIG. 2. The detachable alignment units 40 also include a central rib 65 with a height 68 which is less than or equal to the cavity depth 72 (depicted in FIG. 2) enabling the detachable alignment unit 40 to fit within the recessed longitudinal cavity of FIG. 2, with a foot 57 positioned under the locking rib 23. The detachable alignment units 40 may be affixed to the pallet using any method common in the art. The central rib 65 includes front and rear faces 66 which will contact the inner surface of the locking rib of the bottom of a unit stacked on top of the alignment units, when the unit is positioned into place on top of the alignment unit 40. The length WO 99/44900 - 14 - PCT/US99/04S07 67 of the detachable alignment unit 40 is this exemplary embodiment is chosen to be substantially equal to the length 71 of the upper rib 70 of FIG. 1 so as to prevent lateral sliding of a unit locked onto the detachable alignment unit 40. As would be obvious to one skilled in the art, the detachable alignment units may alternatively, be of any suitable shape. By way of example, they may be pyramidal shaped in the longitudinal (locking) direction, or may not include the rounded edges as depicted. FIG. 14 represents an alternative embodiment of detachable alignment units which may be used to align the stackable crates onto a pallet, and lock them into place. Rectangular members 77 are secured to the pallet 39. Rectangular members 77 fit within openings 37 formed within the bottom of the stackable unit to align the stackable units onto the pallet 39. FIG. 15 is a perspective view of a rectangular member used as a detachable alignment unit 77 for aligning the stackable crates to the pallet. However, it can be appreciated by one familiar with the art, that the rectangular member is presented by way of example. The detachable alignment units may be of any suitable shape capable of fitting within a corresponding opening or indentation formed in the bottom of the unit, to align and lock the units into place on the pallet. FIG. 16 is a perspective view of an exemplary embodiment of an alternative feature for securing the stacked unit into position on the pallet. Pallet 39 includes a friction pad 31 as its top surface. The friction pad is used to provide friction between the pallet and a stacked unit to maintain the stacked unit (not shown) in position and to prevent slippage without additional locking features. In a preferred embodiment, the friction pad 31 may be a rubber mat, but other suitable materials may be used. FIG. 17 is an alternative embodiment of the present invention. Pallet 39 includes a retaining curb 33 which protrudes above top surface 35. Retaining curb 33 extends laterally about the top surface 35 to form an outline which is configured and sized to snugly receive one or more units (not shown) placed on the pallet. In FIG. 17, the retaining curb 33 is sized and shaped to accommodate two 2x2 units disposed side by side on an industry standard pallet, but the retaining curb 33 may be sized and shaped to accommodate a variety of sizes of stackable units of the present invention, stacked individually or side by side on a pallet. FIG. 18 is an alternative embodiment of the retaining curb shown in FIG. 17. In the present embodiment, the retaining curb 34 does not form a continuous curb extending to form the outline, but serves the same function. Retaining curb 34 may also be sized and configured to accommodate a variety of sizes of stackable units of the present invention, stacked individually or side by side on a pallet. In another embodiment, the stackable crate unit may be constructed as two separately formed components capable of being fastened together to form a stackable crate unit. FIG. 19 is a perspective view of the lower component of a stackable crate molded as two separate units which are adapted to fasten together. Each component contains at least one U-shaped retaining member 81. In the exemplary embodiment of FIG. 19, there are two U-shaped retaining members 81. The components are molded so that when one of the components is stacked on top of another upside-down component, with the open sections of the U-shaped members facing each other, the two components combine to form a stackable crate with a corresponding number of hollow retaining members for retaining bottles within, similar to the crate depicted in the previous figures. Openings 35 may extend through the component to receive fastening members projecting through both components, to fasten the components together, or other internal or external fastening means may be used, such as snaps. As an alternative to the openings 35, the open surface 95, may include cylindrical orifices extending from the open surface 95, into the component. These cylindrical orifices may be capable of receiving a rod, such that each rod extends into corresponding orifices from the open surfaces of each of two components stacked on top of one another (with open surfaces facing each other) to form a complete stackable crate unit. The rods may have knurled ends to aid in securing the components tightly together. The rods may be inserted into the components while the components are still hot after molding, as an alternative means of securely fastening the units together. The stackable crate constructed as two separate units, may also include the alignment rib set discussed with reference to FIGs. 1, 1A, 2 and 4. In a preferred embodiment, the corners along one side of the unit may include raised ribs similar to rib 13 in FIG. 1A, and corners on the opposed side of the same plane may include recessed ribs similar to recessed ribs 26 as depicted in FIG 2. In this manner, the two separate pieces molded to combine to form one stackable crate unit, may be identical. When the stackable two-piece crate is assembled, the two sets of alignment ribs from an upper stacked crate will mate with two opposed sets of alignment ribs from a subjacent crate to align the units on top of one another, provide strength points, and lock the units into position. In an alternative embodiment, less than four alignment ribs may be used. This feature whereby different embodiments of the two alignment ribs are used in the same (upper or lower) plane to mate with the opposite alignment rib of the opposed plane of a stacked crate, is also applicable to the unit constructed as one complete unit. Likewise, in an alternative embodiment, the stackable crate unit formed as one piece, may also use less than four alignment ribs per plane. The foregoing represents a detailed description of a 2x2 exemplary embodiment of the present invention. It may be understood that the units may be dimensioned and configured differently. The number of hollow retaining members may be more or less than the two illustrated in the drawings, and the crates may be sized to hold more or less than the two bottles held along the same axis within each retaining member, as depicted in the drawings of the exemplary embodiment. Likewise, for the crate embodiment consisting of two units fastened together, it may be understood that the units to be fastened together to form a crate, may be of different configuration. From the foregoing detailed description, it will be evident that there are a number of other changes, adaptations, and modifications of the present invention which come within the province of one skilled in the art. However, it is considered that all such variations not departing from the spirit of the invention, will be considered as within the scope of the present invention, which will be understood to be limited solely by the scope of the claims appended hereto.

Claims: What is Claimed: 1. A stackable crate, comprising: a top portion defining an upper plane having four corners; a bottom portion defining a lower plane having four corners; two opposite end portions forming a front and a rear, said front and said rear being separated by a distance defining a length; two opposite side portions; at least one hollow retaining member for holding at least one bottle, said member including a retaining wall having an inner surface, an outer surface and including a plurality of supporting beams connected to the outer surface of the retaining wall, each of said beams extending to at least one of said top portion and said bottom portion, and a front opening formed on the front of the crate; and a peripheral wall generally extending from said upper plane to said lower plane and having a plurality of vertical support ribs protruding inwardly from and extending along said peripheral wall; wherein each retaining member is positioned to retain said at least one bottle in a horizontal orientation 2. A stackable crate as in claim 1 , further comprising an alignment system including: at least one lower alignment rib, each lower alignment rib extending diagonally inward from one of said corners of said bottom portion, each said lower alignment rib having an indented portion, a flat portion parallel to the lower plane, and a sloped section connecting the indented portion and the flat portion; and at least one upper alignment rib, each upper alignment rib corresponding to one of the at least one lower alignment rib, each said upper alignment rib extending diagonally inward from one of said corners of said top portion, each said upper alignment rib having a flat section parallel to said upper plane, a raised section, and a sloped portion connecting said flat section to said raised section; wherein each lower alignment rib of said at least one lower alignment rib is configured to mate with an upper alignment rib of said at least one upper alignment rib from an identical subjacent crate to align the crate with the subjacent crate. 3. A stackable crate as in claim 1 , further comprising a locking mechanism, including: a set of locking ribs positioned parallel to, and extending laterally with respect to, said lower plane, said locking ribs being indented from said lower plane by a depth of indentation, to form a recessed longitudinal cavity having a cavity depth and extending between the set of locking ribs and between respective inner surfaces of the locking ribs; a set of locking members on said top portion corresponding to said set of locking ribs, each locking member including a vertical projection having: an upper rib projecting above, and extending laterally with respect to, the upper plane at a height greater than said depth of indentation, said upper rib having a length and including an outer surface; and a pair of sloped ribs extending perpendicularly from said upper rib, said sloped ribs being directed inwardly, and positioned to urge the locking rib of an identical superjacent crate over the upper rib, when the crate and the superjacent crate are slid longitudinally with respect to one another; wherein said locking members are conditioned to be nested within said recessed longitudinal cavity whereby the inner surface of each of said locking ribs is parallel to and in close proximity with an outer surface of a respective one of said of locking members, and whereby each of said pair of sloped ribs is nested within the recessed longitudinal cavity when the crate is stacked on top of the subjacent crate. 4. A stackable crate as in claim 1 , wherein said length is chosen to allow each said retaining member to retain a plurality of bottles along a common axis. 5. A stackable crate as in claim 1 , wherein said retaining members are two in number and are disposed laterally in said crate. 6. A stackable crate as in claim 1 wherein each said hollow retaining member defines a cylindrical cavity. 7. A stackable crate as in claim 3, wherein said retaining members are two in number, disposed laterally in the crate, and each retaining member defines a cylindrical cavity having an uppermost section and a lowermost section, and wherein said locking mechanism is positioned within longitudinal compartments formed on said top portion between said uppermost sections and on said bottom portion between said lowermost sections of the laterally disposed cylindrical cavities. 8. A stackable crate as in claim 6, wherein the cylindrical cavity is circumferentially sized to retain standard sized five gallon bottles used in the bottled water industry, and to allow for insertion and extraction of said bottles. 9. A stackable crate, comprising: a) a top portion defining an upper plane having four corners; b) a bottom portion defining a lower plane having four corners; c) two opposite end portions forming a front and a rear, said front and said rear separated by a distance defining a length ; d) two opposite side portions; e) at least one cylinder configured to hold a plurality of bottles, each cylinder including a retaining wall having an inner surface, an outer surface and including a plurality of supporting beams connected thereto, each of said beams extending to at least one of said top portion and said bottom portion, and a front opening formed on the front of the crate; f) a peripheral wall generally extending from said upper plane to said lower plane and having a plurality of vertical support ribs protruding inwardly from and extending along said peripheral wall; g) an alignment system including at least one lower alignment rib, each lower alignment rib extending diagonally inward from one of said corners of said bottom portion, each said lower alignment rib having an indented portion, a flat portion parallel to the lower plane, and a sloped section connecting the indented portion and the flat portion; and at least one upper alignment rib, each upper alignment rib corresponding to one of the at least one lower alignment rib, each said upper alignment rib extending diagonally inward from one of said corners of said top portion, each said upper alignment rib having a flat section parallel to said upper plane, a raised section, and a sloped portion connecting said flat section to said raised section; wherein each lower alignment rib of said at least one lower alignment rib is configured to mate with an upper alignment rib of said at least one upper alignment rib from an identical subjacent crate to align the crate with the subjacent crate; and h) a locking mechanism including a set of locking ribs positioned parallel to, and extending laterally with respect to, said lower plane, said locking ribs being indented from said lower plane by a depth of indentation, to form a recessed longitudinal cavity having a cavity depth and extending between the set of locking ribs and between respective inner surfaces of the locking ribs; a set of locking members on said top portion corresponding to said set of locking ribs, each locking member including a vertical projection having: an upper rib projecting above, and extending laterally with respect to, the upper plane at a height greater than said depth of indentation, said upper rib having a length and including an outer surface; and a pair of sloped ribs extending perpendicularly from said upper rib, said sloped ribs being directed inwardly, and positioned to urge the locking rib of an identical superjacent crate over the upper rib, when the crate and the superjacent crate are slid longitudinally with respect to one another; wherein said locking members are conditioned to be nested within said recessed longitudinal cavity whereby the inner surface of each of said locking ribs is parallel to and in close proximity with an outer surface of a respective one of said of locking members, and whereby each of said pair of sloped ribs is nested within the recessed longitudinal cavity when the crate is stacked on top of the subjacent crate; wherein the cylinder is positioned within the crate to retain the plurality of bottles in a horizontal orientation and along a common axis. 10. A stackable crate as in claim 9, wherein said cylinders are two in number and are disposed laterally in said crate. 11. A stackable crate as in claim 10, wherein each cylinder is circumferentially sized to receive standard sized five gallon bottles used in the bottled water industry and to allow for insertion and extraction of said bottles. 12. A stackable crate as in claim 11 , wherein each cylinder is sized to receive two of said five gallon bottles arranged end to end. 13. A stackable crate as in claim 3, wherein the locking mechanism is positioned off-center along the length of the crate to provide for non-uniform stacking when stacked crates are rotated 180 degrees with relation to one another. 14. A stackable crate as in claim 1, wherein the peripheral wall further includes apertures therethrough, said apertures generally extending at least upward from said lower plane and downward from said upper plane, and wherein the retaining wall includes retaining wall apertures therethrough for viewing the bottles. 15. A stackable crate as in claim 1, wherein the inner surface of the retaining wall includes a plurality of bores for receiving bumper pins, the bores being situated adjacent to said front opening and located along a lowermost portion of said retaining member. 16. A stackable crate as in claim 15, further comprising bumper pins secured within said bores for retaining bottles within said retaining member, 17. A stackable crate as in claim 1 , wherein the retaining wall includes a plurality of openings therethrough configured to serve as drain holes. 18. A stackable crate as in claim 17, wherein the plurality of openings includes at least two openings located adjacent to said front opening and along a lowermost portion of said retaining member to form lower handles. 19. A stackable crate as in claim 1 , wherein the retaining wall contains a plurality of openings therethrough, at least two of said openings located adjacent to said front opening and along an uppermost portion of said retaining member to form upper handles. 20. A stackable crate as in claim 1 , wherein said crate is formed from injection molded material. 21. A stackable crate as in claim 1 , wherein said crate is formed from blow molded material. 22. A stackable crate as in claim 1, wherein said crate is formed from rotational molded material. 23. A stackable crate as in claim 1 , wherein said crate is formed from structural foam. 24. A stackable crate as in claim 1 , wherein said crate is formed from gas-assisted injected molded material. 25. A stackable crate as in claim 1, wherein said crate is formed from reaction-injected molded material. 26. A stackable crate as in claim 1 , wherein said crate is formed from compression molded material. 27. A stackable crate as in claim 1 , wherein said crate is formed from structural web molded material. 28. A stackable crate as in claim 1 , wherein said crate is formed from vacuum formed material. 29. A stackable crate as in claim 2, further comprising a locking mechanism, including: a set of locking ribs positioned parallel to, and extending laterally with respect to, said lower plane, said locking ribs being indented from said lower plane by a depth of indentation, to form a recessed longitudinal cavity having a cavity depth and extending between the set of locking ribs and between respective inner surfaces of the locking ribs; a set of locking members on said top portion corresponding to said set of locking ribs, each locking member including a vertical projection having: an upper rib projecting above, and extending laterally with respect to, the upper plane at a height greater than said depth of indentation, said upper rib having a length and including an outer surface; and a pair of sloped ribs extending perpendicularly from said upper rib, said sloped ribs being directed inwardly, and positioned to urge the locking rib of an identical superjacent crate over the upper rib, when the crate and the superjacent crate are slid longitudinally with respect to one another; wherein said locking members are conditioned to be nested within said recessed longitudinal cavity whereby the inner surface of each of said locking ribs is parallel to and in close proximity with an outer surface of a respective one of said of locking members, and whereby each of said pair of sloped ribs is nested within the recessed longitudinal cavity when the crate is stacked on top of the subjacent crate. 30. A stackable crate as in claim 1 , wherein said crate is a two-piece crate and wherein said top portion and said bottom portion are separate components which are secured together. 31. A two-piece stackable crate as in claim 30, wherein said top portion and said bottom portion are substantially identical. 32. A two-piece stackable crate as in claim 30, wherein said top portion and said bottom portion are secured together by internal fastening means. 33. A stackable crate as in claim 1, further comprising a rear opening having an area which is smaller than an area defined by the inner surface of the retaining member taken along a plane parallel to said rear, wherein said rear opening is sized to allow a pusher of an automatic unloading machine to be inserted therethrough. 34. A stackable crate as in claim 1, wherein said peripheral wall includes an inner surface and an outer surface, and includes a plurality of vertical slits extending along said inner surface, said slits being capable of receiving strapping means to secure a plurality of stacked crates together. 35. A stackable crate as in claim 1, further comprising a plurality of bottles held within said at least one hollow retaining member. 36. A stackable crate as in claim 1 , wherein said top portion includes a plurality of bosses extending therefrom, and wherein said bottom portion includes a corresponding plurality of receiving members, disposed to receive said plurality of bosses of an identical subjacent crate, when the crate is stacked on top of the subjacent crate. 37. A stackable crate as in claim 8, wherein the length of the crate is sufficient to hold two of said standard sized five gallon bottles whereby a portion of the front bottle protrudes slightly from the front of the crate when said two bottles are in contact with one another and the rear bottle is in contact with the rear of said crate. 38. A stackable crate component comprising: a top portion defining an upper plane having four corners; a bottom portion defining a lower plane having four corners; two opposite end portions forming a front and a rear, said front and said rear separated by a distance defining a length; two opposite side portions; at least one horizontal U-shaped retaining member extending from said front to said rear, said member including a retaining wall having an inner surface, an outer surface and including a plurality of supporting beams connected to the outer surface of the retaining wall, each of said beams extending to at least one of said top portion and said bottom portion, and a front opening formed on the front of the crate; and a peripheral wall generally extending from said upper plane to said lower plane and having a plurality of vertical support ribs protruding inwardly from and extending along said peripheral wall; wherein the open section of each of said U-shaped retaining member extends to said bottom portion; and whereby one said crate component may be secured to an identical subjacent said crate component positioned upside-down, to form a stackable crate, said crate including at least one horizontal retaining member, each horizontal retaining member comprising a cylinder formed by the mating of the open section of one said U-shaped retaining member with a corresponding open section of said U-shaped member of said identical subjacent crate component. 39. A stackable crate component as in claim 38, further comprising an alignment system including: at least one recessed alignment rib, each recessed alignment rib extending diagonally inward from one of said corners and having an indented portion, a flat portion parallel to its associated plane, and a sloped section connecting the indented portion and the flat portion; and at least one raised alignment rib, each raised alignment rib extending diagonally inward from one of said corners and having a flat section parallel to its associated plane, a raised section, and a sloped portion connecting said flat section to said raised section, each said raised alignment rib configured to mate with one of the at least one recessed alignment rib. 40. A stackable crate component as in claim 38, further comprising fastening means for fastening two said stackable crate components together to form a stackable crate, said fastening means comprising a plurality of receiving means included in said bottom portion, and a corresponding plurality of rods having knurled ends, each of said receiving means capable of receiving a portion of one of said plurality of rods. 41. A stackable crate as in claim 1 , further comprising an alignment system including: at least one recessed alignment rib, each recessed alignment rib extending diagonally inward from one of said corners and having an indented portion, a flat portion parallel to its associated plane, and a sloped section connecting the indented portion and the flat portion; and at least one raised alignment rib, each raised alignment rib extending diagonally inward from one of said corners and having a flat section parallel to its associated plane, a raised section, and a sloped portion connecting said flat section to said raised section, each said raised alignment rib configured to mate with one of the at least one recessed alignment rib. 42. A modular rack system comprising a plurality of stacked crates, each of said crates comprising: a top portion defining an upper plane having four corners; a bottom portion defining a lower plane having four corners; two opposite end portions forming a front and a rear, said front and said rear being separated by a distance defining a length; two opposite side portions; at least one hollow retaining member for holding at least one bottle, said member including a retaining wall having an inner surface, an outer surface and including a plurality of supporting beams connected to the outer surface or to the retaining wall, each of said beams extending to at least one of said top portion and said bottom portion, a front opening formed on the front of the crate; and a peripheral wall generally extending from said upper plane to said lower plane and having a plurality of vertical support ribs protruding inwardly from and extending along said peripheral wall; wherein the at least one hollow retaining member is positioned to retain said at least one bottle in a horizontal orientation and along a common axis. 43. The modular rack system of claim 42 further comprising external fastening means to permanently secure the stacked crates together. 44. The modular rack system of claim 42 wherein each of said stackable crates includes a plurality of vertical slits extending along an inner surface of said peripheral wall, said slits capable of receiving strapping means to secure a plurality of stacked crates together. 45. The modular rack system of claim 44 further comprising strapping means inserted through said vertical slits to permanently secure a plurality of stacked crates together. 46. The modular rack system of claim 42 wherein each of said crates further comprises a locking mechanism, including: a set of locking ribs positioned parallel to, and extending laterally with respect to, said lower plane, said locking ribs being indented from said lower plane by a depth of indentation, to form a recessed longitudinal cavity having a cavity depth and extending between the set of locking ribs and between respective inner surfaces of the locking ribs; a set of locking members on said top portion corresponding to said set of locking ribs, each locking member including a vertical projection having: an upper rib projecting above, and extending laterally with respect to, the upper plane at a height greater than said depth of indentation, said upper rib having a length and including an outer surface; and a pair of sloped ribs extending perpendicularly from said upper rib, said sloped ribs being directed inwardly, and positioned to urge the locking rib of an identical superjacent crate over the upper rib, when the crate and the superjacent crate are slid longitudinally with respect to one another; wherein said locking members are conditioned to be nested within said recessed longitudinal cavity whereby the inner surface of each of said locking ribs is parallel to and in close proximity with an outer surface of a respective one of said of locking members, and whereby each of said pair of sloped ribs is nested within the recessed longitudinal cavity when the crate is stacked on top of the subjacent crate. 47. The modular rack system of claim 46, further comprising a pallet having a front and a rear defining a distance, said distance being an industry standard pallet length, whereby said stacked crates are stacked on top of said pallet. 48. The modular rack system of claim 47, further comprising a set of detachable alignment units for locking said crates into position on top of said pallet, each of said alignment units including: a base having a height less than or equal to said depth of indentation of said locking rib; a width less than or equal to the length of said upper rib of said locking member; a top having a height less than or equal to said cavity depth of said recessed longitudinal cavity; and a central rib extending along entire said width and having a front face, a rear face, and an upper section forming said top; wherein the base forms a foot extending along the front face and the rear face of said central rib. 49. The modular rack system of claim 48, wherein the alignment units of said set of detachable alignment units are secured to said pallet to lock a lowermost crate of said plurality of stacked crates into place, said lowermost crate cooperating with said set of alignment units wherein said set of alignment units are nested within said recessed longitudinal cavity of said lowermost stacked crate, whereby said front face of said central rib of a first alignment unit of said set of alignment units is parallel to and in close proximity with said inner surface of a first locking rib of said set of locking ribs, and whereby said rear face of said central rib of a second alignment unit of said set of alignment units is parallel to and in close proximity with said inner surface of a second locking rib of said set of locking ribs. 50. The modular rack system of claim 49, wherein said set of alignment units is positioned on said pallet so that the rear of each of said plurality of stacked crates is coincident with rear of said pallet. 51. The modular rack system of claim 50, wherein the length of each crate is sufficient to hold two standard sized five gallon bottles used in the bottled water industry within said retaining member, whereby the front bottle protrudes slightly from the front of the crate when said two bottles are in contact with one another and the rear bottle is in contact with the rear of said crate; and whereby the length is less than said industry standard pallet length, creating an exposed foot of said pallet extending forward of said front of said stackable crate; and whereby said front bottle protrudes over said exposed foot of said pallet and does not protrude over the front of said pallet. 52. The modular rack system of claim 42 wherein each of said crates further comprises an alignment system including: at least one lower alignment rib, each lower alignment rib extending diagonally inward from one of said corners of said bottom portion, each said lower alignment rib having an indented portion, a flat portion parallel to the lower plane, and a sloped section connecting the indented portion and the flat portion; and at least one upper alignment rib, each upper alignment rib corresponding to one of the at least one lower alignment rib, each said upper alignment rib extending diagonally inward from one of said corners of said top portion, each said upper alignment rib having a flat section parallel to said upper plane, a raised section, and a sloped portion connecting said flat section to said raised section; wherein each lower alignment rib of said at least one lower alignment rib is configured to mate with an upper alignment rib of said at least one upper alignment rib from an identical subjacent crate to align the crate with the subjacent crate. 53. The modular rack system of claim 42 wherein each of said crates further comprises an alignment system including: at least one recessed alignment rib, each recessed alignment rib extending diagonally inward from one of said corners and having an indented portion, a flat portion parallel to its associated plane, and a sloped section connecting the indented portion and the flat portion; and at least one raised alignment rib, each raised alignment rib extending diagonally inward from one of said corners and having a flat section parallel to its associated plane, a raised section, and a sloped portion connecting said flat section to said raised section, each said raised alignment rib configured to mate with one of the at least one recessed alignment rib. 54. The modular rack system of claim 42, further comprising a pallet, whereby said stacked crates are stacked on top of said pallet. 55. The modular rack system of claim 54, wherein said pallet includes a top surface comprising a friction pad, said friction pad resistant to sliding. 56. The modular rack system of claim 55, wherein said friction pad comprises a rubber mat. 57. The modular rack system of claim 54, wherein said pallet includes a top surface and a retaining curb extending above said top surface and forming an outline, said outline sized and shaped to receive said bottom portion of at least one said stackable crate securely within said outline. 58. The modular rack system of claim 57, wherein said retaining curb is a continuous rib. 59 The modular rack system of claim 57, wherein said retaining curb is a discontinuous rib. 60. A stackable crate as in claim 1, further comprising a corner support system including: at least one lower corner support rib, each lower corner support rib being coplanar with said lower plane and extending diagonally inward from one of said corners of said bottom portion; and at least one upper corner support rib, each upper corner support rib corresponding to one of the at least one lower corner support rib, each said upper corner support rib being coplanar with said upper plane and extending diagonally inward from one of said corners of said top; WO 99/44900 _ 3! . PCT/US99/04507 wherein each lower corner support rib of said at least one lower corner support rib is configured to contact a corresponding upper corner support rib of said at least one upper corner support rib from an identical subjacent crate to support the stacked crates. 61. The modular rack system of claim 42 wherein each of said crates further comprises a corner support system including: at least one lower corner support rib, each lower corner support rib being coplanar with said lower plane and extending diagonally inward from one of said corners of said bottom portion; and at least one upper corner support rib, each upper corner support rib corresponding to one of the at least one lower corner support rib, each said upper corner support rib being coplanar with said upper plane and extending diagonally inward from one of said corners of said top; wherein each lower corner support rib of said at least one lower corner support rib is configured to contact a corresponding upper corner support rib of said at least one upper corner support rib from an identical subjacent crate to support the stacked crates. 62. A stackable crate as in claim 1, further comprising a lateral placement feature, including: a pair of parallel longitudinal ribs extending longitudinally along said lower plane; a recessed longitudinal cavity extending laterally between said pair of parallel longitudinal ribs and extending longitudinally between a set of cavity ribs extending laterally with respect to, and at least partially parallel to, said lower plane, said set of cavity ribs including a front cavity rib including a front inner surface, and a rear cavity rib including a rear inner surface; a set of locking members on said top portion corresponding to said set of cavity ribs, each locking member including a vertical projection having: an upper rib projecting above, and extending laterally with respect to, the upper plane, and including an outer surface; and a pair of sloped ribs extending perpendicularly from said upper rib, said sloped ribs being directed centrally and sloping downward to said upper plane; wherein the set of locking members is positioned to allow a longitudinal rib of said pair of parallel longitudinal ribs of a superjacent crate, to slide along an upper rib of each locking member of said set of locking members, when the superjacent crate and said crate are slid laterally with respect to one another, until the set of locking members become nested within said recessed longitudinal cavity of said superjacent crate, wherein the inner surface of each said cavity rib is parallel to, and in close proximity with, an outer surface of a respective one of said locking members, thereby locking said superjacent crate into position on top of said crate.

Inventors: DONNELL EMERSON B JR, KELLY DANIEL E, DONNELL, EMERSON, B., JR., KELLY, DANIEL, E.
Applicants: DONNELL EMERSON B JR, KELLY DANIEL E, DONNELL, EMERSON, B., JR., KELLY, DANIEL, E.
Application year: 1999
Main classification: B65D21
IPC codes: B65D1, B65D19, B65D21