1. Field of the Invention
This invention relates generally to containers, and more specifically to container made from a recyclable material used to transport bulk amorphous materials such as liquids and/or powders that exert substantial lateral forces on containers sidewalls while in transit.
2. Description of the Related Art
Historically bulk products such as liquids, powders, and other amorphous materials have been transported in large metal containers or drums. The metal containers or drums traditionally provided the greatest strength to withstand the lateral forces exerted by the flow of the contents when in transit. Metal containers have in large part been replaced part by containers and drums made from rigid polymeric resins. Flexible bladders have also been used to hold the contents, but were unsuitable for shipment alone because of their inability to remain rigid. More rigid external shells had to be used to constrain the bladders. The more rigid containers such as metal or plastic gaylords present a problem in terms of cost since most are shipped back empty to the source or origin. With the overall trend to greener technologies and recycling, metal and plastic containers present an environmental and cost issue.
The instant invention greatly reduces the cost associated with shipping containers. The instant invention is also easily recyclable, thus reducing the need to return empty containers to a point of origin. A better understanding of the invention and the different embodiments may be obtained from a reading of the following detailed description taken in combination with the attached drawing figures.
An object of the invention is to overcome the disadvantages of the prior containers by providing a recyclable container of sufficient dimension to handle products in bulk quantities and with sufficient strength and attributes to constrain the contents while providing an easy and inexpensive manner for dispensing the contents. The containers can be shipped one way and recycled at the destination, thus reducing the cost for return shipping. This invention also provides the added benefit of reusing the containers without contamination by simply replacing the protective container lining.
According to one form of the invention, the invention comprises a floor assembly, a multi-faceted rigid exterior sidewall integrally connected to and extending upwardly from the floor assembly defining an upper edge. A tray assembly is disposed within the multi-faceted rigid exterior sidewall and rest upon the floor assembly. A disposable protective bladder is disposed upon the tray assembly to contain the contents to be transported. The protective bladder includes an outlet valve assembly that extends through a hole formed in the multi-faceted rigid exterior sidewall. A cap assembly closes the top of the container enabling stacking of the containers.
According to another form of the invention, the container comprises at least one channel member disposed over the upper edge of the multi-faceted exterior sidewall for reinforcing the sidewall. The channel member may include a first and a second leg, where the first leg may be substantially longer than the second leg to provide stability to the sidewall. If desired the first leg immediately adjacent the sidewall may be adhered to an interior surface of multi-faceted rigid exterior sidewall. A plurality of tabs may extend from the upper edge of the multi-faceted rigid exterior sidewall for folding inwardly into the container to provide reinforcement for the rigid exterior sidewall. The tray may include a plurality of sidewalls configured to lie adjacent an interior of the multi-faceted rigid sidewall. At least one of the sidewalls of the tray preferably includes a port for receiving there through the outlet valve assembly of the bladder. The multi-faceted rigid exterior sidewall may be comprised of a plurality of laminated sheets of corrugated paper. A first plurality of the laminated sheets of corrugated paper may have at least one edge overlapping and compressed against an edge of a second plurality of the laminated sheets of corrugated paper to form a stepped joint. The floor assembly may be comprised of a plurality of folding tabs, each integral with and extending from a lower edge of an opposing facet of the multi-faceted rigid sidewall, each of the folding tabs including a plurality of end tabs configured to interweave with and interlock with a corresponding plurality of end tabs on an opposing folding tab.
In yet another form of the invention, a recyclable container is provided for transporting bulk materials. The recyclable container comprises a primary panel assembly having an upper edge, a lower edge, and opposing ends, the opposing ends interconnected together along a staggered joint to form a plurality of interconnected sidewall panels. Extending from the lower edge of the primary panel and integrally connecting opposing ones of the plurality of sidewall panels are a plurality of tabs. The tabs are foldable toward one another and interlock with an opposing one of the tabs to form a floor assembly for the container. Portions of two opposing tabs extend beyond a perimeter of the sidewall panels to provide a platform for the container. A tray assembly is disposed within the recyclable container upon the floor assembly and includes a plurality of sidewalls for nesting against the interior of the recyclable container. One of the sidewalls of the tray assembly includes a port that is aligned with a port formed in one of the sidewall panels of the container. A protective bladder is disposed upon the tray assembly and includes a nozzle that extends through the ports formed in the tray assembly and the sidewall panel to allow removal of the contents of the bladder. At least one channel reinforces the upper edge of the primary panel. The channel may include one leg that extending along and lies immediately adjacent the sidewall panels to provide additional strength. A cap assembly closes the container by resting upon the upper edge of the sidewalls.
In another form of the invention, the container includes a rigid carrier upon which the container floor assembly rests. The primary panel assembly may be comprised of a plurality of layers of corrugated paper, overlapping at staggered intervals with an opposite end of the primary panel assembly to disperse the forces acting upon the seam. The many tabs extending from the lower edge of the primary panel may further include a plurality of end tabs configured to interleave with a corresponding end tab on the opposing tab for holding the floor assembly in place. Portions of the many tabs extend beyond the perimeter of the sidewall to provide a more rigid base for the container.
In yet another form of the invention, the channels used to reinforce the upper edge of the sidewall may be substituted by a plurality of tabs integral with and extending from the upper edge of the primary panel and foldable to lie substantially adjacent the primary panel.
In still another form of the invention, the shape of the container may be polygonal ranging from an octagon to substantially a cylinder. The preferred shape evenly distributes the outwardly acting forces of the contents about the exterior sidewall.
In yet another form of the invention, a recyclable bulk container is provided comprising a sidewall, a floor assembly integrally connected to a lower edge of the sidewall, the floor assembly including tabs extending outwardly beyond a perimeter of the sidewall for supporting the container; a tray assembly disposed within the sidewall and upon the floor assembly; and a cap assembly closing an upper end of the sidewall. A bladder may be disposed within the sidewall of the container and upon the tray assembly. A spout, port, nozzle or other means may be attached to the bladder and extend through the container sidewall for emptying the contents from the container upon reaching its destination.
The advantages provided by the invention include a lightweight disposable “green” container that is recyclable once it has reached its destination or end of life. The materials used to manufacture the container can be reused to produce other products at a minimal cost. The disposable and recyclable nature of the container makes it less expensive to manufacture and reduces shipping costs or returning of containers for later use. These and other advantages of the invention will become readily apparent from a reading of the detailed description and reference to the associated drawing figures.
For purposes of the following description, the terms “upper,” “lower,” “left,” “rear,” “front,” “vertical,” “horizontal” and derivatives of such terms shall relate to the invention as oriented in
In the embodiment shown in
Depending from lower edge 50 yet integrally connected to primary panel 42 are a plurality of flaps 52, 54, 56, and 58, each configured to fold along a hinge line, fold line, or crease 60 coincident with the lower margin or edge 50 to form the integral floor assembly 26 when folded together. Primary panel 42 may contain a plurality of creases, hinge lines, or fold lines formed therein by compression of the corrugated material to aid in the forming of the different sidewall elements. In a preferred embodiment of the invention, vertical creases, or hinges 62, 64, 66, 68, 70, 72, 74, 76, and 78 may be formed in the primary panel substantially perpendicular to upper edge 44 and lower margin 50 where it is desired to form the sidewall facets or panels 82, 84, 86, 88, 90, 92, 94, and 96. Sidewall panel facets 88 and 96 are intended to have the same width as do bottom panels 54 and 58. Bottom panels 52 and 54 are separated from panel 42 along cuts 98, 100, 102, and 104 which extend inwardly from the edges of the bottom panels 52 and 54 up to crease lines 64, 66, 72 and 74, respectively. When multiple plies, layers, or laminations of corrugated paper are used, it is preferred that the many flaps align even though the plies at the ends are staggered.
When exterior sidewall blank 40 is folded along fold lines 62, 64, 66, 68, 70, 72, 74, 76, and 78, and when bottom panels 52, 54, 56 and 58 are folded inwardly toward the interior of the container 20 along hinge line 60, an multi-panel sidewall is formed to create the interior confines of the container 20 and the floor assembly 26. Portions of the bottom panels 52 and 56 extend beyond the octagonal shape created by the panels 82, 84, 86, 88, 90, 92, 94 and 96 as a result of cuts 98, 100, 102 and 104 as shown in
In a preferred embodiment of the invention, each of the bottom panels 52, 54, 56 and 58 include a set of tabs intended to cooperate and interlock with corresponding tabs in an opposing panel when the bottom is folded into position. Referring again to
A better understanding of the form and construction of the tray assembly 30 shown in
In a preferred embodiment of the invention, the thickness of the corrugated paper panel used to make tray 30 may be thicker than the material used to make the other components. Alternatively, tray 30 may be formed from a paper/polymer laminated composite material to obtain the desired strength. A polymer external coating may be applied to an upper surface of the tray to prevent absorption of liquids such as may leak from the bladder, form as a result of condensation, or be deposited as a result of weather.
The intent of this invention is to provide a recyclable container for carrying bulk items such as liquids, powders, granular material or the like. Although the container is suitable for carrying substantially any type of goods or materials including parts and the like, a preferred embodiment of the invention is to transport fluid materials or materials that behave as a fluid such as liquids, powders or granular materials including palletized plastic or grain. For liquid materials or fine powder or granular material it may be desired to use a liner or bladder such as generally referenced by numeral 32 to hold the contents without leaking through the container floor. One option of the invention is that the contents may be contained simply within a liner or bag disposed within and constrained by the sidewalls. The bag or liner may substantially fill the interior of the container 20 and hold the contents, to be emptied either by a vacuum or other conveyance from the top opening of the container. However, in a preferred embodiment of the invention, the container would be used to transport bulk liquids or powders contained within the bladder 32. A spout, valve, or closeable opening 36 is provided toward the bottom of the bladder such that it can extend through the port 38 formed through the sidewalls, and by opening 209 formed in the tray tab 196. The volume to be held by the bladder 32 may be substantial as provision has been made for the sidewalls to withstand substantially outward radial forces. The size of the bladder 32 may be such as to fill the entire cavity within the sidewalls. Substantially any suitable impermeable material may be used for bladder 32 including commonly recyclable polymers.
Cap assembly 34 is preferably cut from a single sheet of corrugated paper material commonly known in the art, although it is anticipated that polymer coated corrugated paper may also be used as the cap assembly may have greater exposure to the elements that other components of the assembly. Polymeric layers or exterior coats, or wax impregnation of the material should inhibit absorption of moisture or other liquids. As best illustrated in
Briefly mentioned above, it may be desired to reinforce the upper edges 44 and 132 of the exterior and interior sidewalls 24, 28 with reinforcement members 39 to protect them against crushing impacts and the radial forces exerted by the contents of the container. The reinforcement of the sidewalls 24 and 26 at the upper edges 44 and 132 also serve to strengthen the intermediate portions of the sidewalls furthest from the crease or hinge lines from the forces exerted from the interior of the container 20 by the contents. According to one aspect of the invention, suitable reinforcement may be obtained by a U-shaped corrugated channel 250 such as shown in
An alternate embodiment of an exterior sidewall blank 260 of the invention is shown in
In operation the various blanks are cut from the desired material. The exterior sidewall assembly 24 is preferably folded about the vertical hinge lines to produce a substantially octagonal cylinder. Portions of panel 84 overlaps with a portion of panel 96 where a suitable adhesive is used to holds the panels together. As mentioned above, portion 84 may have a plurality of stepped or staggered lamination of corrugations that overlaps with the corresponding end to produce a joint where the forces are distributed over an angular arc. Tabs 52, 54, 56 and 58 may be folded inwardly to close the bottom of the exterior sidewall tube. End tabs 106, 108 and 110 may be engaged by one or more tabs 120, 122 and 124 extending from flaps 54 and 58 to aid in holding the bottom of the container closed. Once the exterior sidewall 24 and floor assembly 26 are formed, interior sidewall blank 130 is folded along the identified hinge lines such that end 136 of panel 132 overlaps with and is adhered to panel 154 and forms the octagonal interior sidewall insert 28. It is further contemplated that the exterior of sidewall 28 may be sprayed or have otherwise applied a suitable adhesive such that when interior sidewall 28 is concentrically located within exterior sidewall 24 the adhesive bonds and forms a very rigid octagonal box.
Depending upon the embodiment of the invention selected, the upper edge 44 and 50 of the sidewalls 24 and 28 may be reinforced, either by the application of the U-shaped channels or by the folding over of the tabs 262, 264, 266 and 268 described and shown in
With the body of the container substantially complete tray blank 172 is folded and bladder or liner 32 may be disposed thereon such that the spout, valve or outlet 36 is received by the port 209. The tray 30 and bladder 32 are then placed within the container 20 against the floor 26 and the spout or valve 36 is worked through the ports 38 formed in the sidewall. The bladder is then suitable arranged on the tray 30 so that it may be easily accessed from the top opening of the container for filling at a later stage. The top of the container is closed with the folded cap assembly 34. Folding of the cap assembly 34 is rather straight forward and is simply provided to prevent unwanted debris or contaminants access to the interior of the container.
The above description is considered that of the preferred embodiments only. Modifications of the invention will occur to those skilled in the art and to those who make or use the invention. Therefore, it is understood that the embodiments shown in the drawings and described above are merely for illustrative purposes and not intended to limit the scope of the invention.
This application claims the benefit of U.S. provisional patent application Ser. No. 61/227,503 filed Jul. 22, 2009 pursuant to 35 U.S.C. § 119, the contents of which are incorporated herein by reference in its entirety to provide continuity of disclosure.
Number | Date | Country | |
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61227503 | Jul 2009 | US |