Thermally Protected Shipping Container

Abstract

A container for storage and shipping of objects includes a lid assembly having two configurations and an open-top box. In the first configuration the container can be loaded with objects for storage or collection while limiting physical and visual access to the contents of the box and in the second configuration, the container is sealed for shipping. The lid assembly contains side flaps which may be used to stabilize the lid assembly in the first configuration, and in the second configuration, secure the lid assembly to the open-top box. Preferably, the container is formed from one contiguous blank. The blank is preferably made of corrugated cardboard but may be formed from any substantially rigid material. The container is thermally protected with a flame-retardant treatment, such as a thermally protective lining.

Claims

1. A container comprising: an open-top box having an upper edge and including a top flap attached to the upper edge along a first fold line; and a lid assembly attached to the upper edge of the open-top box along a second fold line and comprising: a back panel; a front panel attached to the back panel and including an opening; and a pair of side flaps attached to at least one of the back panel and the front panel along a pair of fold lines, wherein the lid assembly has a first configuration in which the lid assembly is coupled to the top flap such that the opening in the front panel provides access to an interior of the open-top box with the pair of side flaps folded to form a side closure to the lid assembly; and wherein the lid assembly has a second configuration in which the pair of side flaps secure the lid assembly to the open-top box such that the container is sealed for shipment, and wherein at least a portion of the container includes a flame-retardant treatment.

2. The container of claim 1, wherein the front panel of the lid assembly further comprises a door configured to substantially close the opening.

3. The container of claim 1, wherein the front panel is directly attached to the back panel along a third fold line.

4. The container of claim 1, wherein the lid assembly further comprises a top panel, wherein the front panel is attached to the back panel via the top panel with the top panel being attached the front panel along a third fold line and attached to the back panel along another fourth fold line.

5. The container of claim 1, wherein the pair of side flaps are attached to the front panel of the lid assembly along a pair of fold lines.

6. The container of claim 1, wherein the pair of side flaps are attached to the back panel of the lid assembly along a pair of fold lines.

7. The container of claim 1, wherein the open-top box and lid assembly are formed from one contiguous, foldable sheet of a substantially rigid material.

8. The container of claim 1, wherein the flame-retardant treatment comprises a thermally protective lining.

9. The container of claim 8, wherein the thermally protective lining comprises polyethylene terephthalate.

10. A blank of substantially rigid material comprising: a first plurality of contiguous panels joined along a plurality of fold lines and foldable into an open-top box having an upper edge; and a second plurality of contiguous panels attached to the first plurality of foldable panels along a lid assembly fold line and including a plurality of fold lines such that the second plurality of contiguous panels is foldable into a lid assembly, the second plurality of contiguous panels comprising: a back panel; a front panel including an opening; and a pair of side flaps adjacent to at least one of the back panel and the front panel and demarcated by a pair of fold lines; a flame-retardant treatment applied to at least some of the panels of the first plurality of contiguous panels or the second plurality of contiguous panels, wherein the lid assembly has a first configuration in which the lid assembly is coupled to the top flap such that the opening in the front panel provides access to an interior of the open-top box with the pair of side flaps folded to form a side closure to the lid assembly; and wherein the lid assembly has a second configuration in which the pair of side flaps secure the lid assembly to the open-top box such that the container is sealed for shipment.

11. The blank of claim 10, wherein the front panel of the lid assembly further comprises a door configured to substantially close the opening.

12. The blank of claim 10, wherein the front panel is directly attached to the back panel along a fold line.

13. The blank of claim 10, wherein the lid assembly further comprises a top panel, wherein the front panel is attached to the back panel via the top panel with the top panel being attached the front panel along a fold line and attached to the back panel along another fold line.

14. The blank of claim 10, wherein the pair of side flaps are attached to the front panel of the lid assembly along a pair of fold lines.

15. The blank of claim 10, wherein the pair of side flaps are attached to the back panel of the lid assembly along a pair of fold lines.

16. The blank of claim 10, wherein the flame-retardant treatment comprises a thermally protective lining.

17. The container of claim 16, wherein the thermally protective lining comprises polyethylene terephthalate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a front view of an assembled container in the first configuration.

[0017] FIG. 2 is an isometric view of the front of an assembled container in the first configuration.

[0018] FIG. 3 is an isometric view of the front of a partially unassembled container.

[0019] FIG. 4a is an isometric view of the front of a container being converted into the second configuration.

[0020] FIG. 4b is an isometric view of the front of a container being converted into the second configuration.

[0021] FIG. 4c is an isometric view of the front of an assembled container in the second configuration.

[0022] FIG. 5 is an isometric view of the back of a partially unassembled container.

[0023] FIG. 6 is a top-down view of an unassembled container formed from one contiguous foldable sheet of substantially rigid material.

DETAILED DESCRIPTION

[0024] FIG. 1 illustrates a container 10 according to one embodiment of the instant disclosure, assembled in the first configuration, as viewed from the front of container 10. The container 10 includes an open-top box portion 11 having an upper edge 12 (the rear portion of which is shown in phantom) and including a top flap 13 which is attached to the upper edge 12 along a fold line 60. It should be understood that, as used herein, the term attached is not limited to the joining of separate pieces. Indeed, the term attached as used herein encompasses components that are integrally formed, such as from a single blank, and demarcated or otherwise separated by a perforation, fold line (including perforated fold lines), or the like.

[0025] Container 10 further includes a lid assembly 14, which is attached to the upper edge 12 of the open-top box portion 11 along a fold line 61. Fold lines 60 and 61 partially define upper edge 12 of the open top box portion 11. FIG. 1 further depicts front panel 15, which includes an opening 16. FIG. 1 depicts an optional door 17, which substantially covers the opening 16.

[0026] The open-top box portion 11 is a box as understood by one of ordinary skill in the art. As shown in FIG. 3, the open-top box portion 11 has a bottom and four sides. The top of the open-top box portion 11 is open. The top flap 13 is attached to the upper edge 12 along a fold line 60. As seen in FIG. 3, the top flap 13 can be folded such that top flap 13 at least partially covers the top of the open-top box portion 11. One of ordinary skill in the art will readily appreciate the construction of open-top box portion 11, such that further description herein is not necessary.

[0027] As shown in FIG. 2, the lid assembly 14 includes a back panel 20 and a front panel 15 attached to the back panel 20 via an optional top panel 21. In the depicted embodiment, the top panel 21 is attached to both the front panel 15 and the back panel 20 along fold lines 62 and 63, respectively. It should be understood, however, that top panel 21 is not necessary. That is, though FIG. 2 depicts back panel 20 and front panel 15 interconnected via top panel 21, it is contemplated that, according to aspects of the disclosure, back panel 20 can bed directly connected to front panel 15 along a fold line (e.g., without intervening top panel 21).

[0028] As illustrated in FIGS. 2 and 3, a pair of side flaps 22 are attached to the front panel 15 along fold lines 64. In the first configuration, the tabs 23 on the side flaps 22 slide into the notches 24 in the back panel 20 as seen in FIG. 2. The notches 24 are configured such that the tabs 23 can be securely locked into the notches 24. In this configuration, the side flaps 22 form the side closures to the lid assembly 14. Alternatively, the side flaps 22 can be attached to the back panel 20, while the notches 24 may be placed on the front panel 15. The tabs 23 of the side flaps 22 could still be configured to lock into notches 24 such that the side flaps 22 form the side closures of the lid assembly 14. Once the tabs 23 are locked into notches 24, the front panel 15 and back panel 20 are coupled together and the lid assembly 14 is stabilized.

[0029] It should be understood that the tab and notch assembly is not the only contemplated approach to forming side closures with the side flaps 22. One of ordinary skill in the art would recognize that any approach to securing the side flaps 22 to the back panel 20 (if side flaps 22 are attached to the front panel 15 along fold lines), or alternatively to the front panel 15 (if side flaps 22 are attached to the back panel 20 along fold lines) can suffice to form side closures for the lid assembly 14.

[0030] FIG. 3 further illustrates sliding tabs 30 and top flap slots 31 that allow the lid assembly 14 to be coupled to the top flap 13. Once the lid assembly 14 is formed by securing the side flaps as described above, the sliding tabs 30 can be placed in corresponding top flap slots 31, thus coupling the lid assembly 14 to the top flap 13 as illustrated in FIG. 2. Again, it is to be understood that any approach to coupling the lid assembly to the top flap may be used, without limitation to the sliding tab and slot assembly particularly illustrated in FIGS. 2 and 3.

[0031] When in the first configuration, as shown in FIGS. 1-2, various objects (e.g., rechargeable batteries) can be placed in the container through the opening 16. A door 17 can substantially cover the opening 16, further limiting visual access to the contents of the container. When the container is full, the lid assembly can be disassembled as shown in FIG. 3. and then reconfigured in the second configuration as described below for shipment of the container.

[0032] The reconfiguration of the lid assembly for shipment of the container will be described with reference to FIGS. 4a-4c. The lid assembly 14 is brought downwards, towards the open-top box portion 11 such that the back panel 20 lays flat against the top of the open-top box 11 as shown in FIGS. 4b-4c. In embodiments with top panel 21, the top panel 21 also lays flat against the top of the open-top box portion 11 as shown in FIGS. 4b-4c. In embodiments without a top panel 21 (not shown), it is contemplated that the back panel 20 covers the entire top of the open-top box portion 11. Thus, the back panel 20 and optionally, the top panel 21, cover the opening of the open-top box portion 11, forming a top to the open-top box portion 11. The side flaps 22 may then be secured to the sides of the open-top box portion 11 by packaging tape, adhesive, pre-applied adhesive, or other methods that will be familiar to those of ordinary skill in the art. Preferably, the side flaps 22 tuck into slots 35 in the front of the open-top box portion 11. As seen in FIG. 4c, once the side flaps 22 are secured in slots 35, the container 10 is sealed and ready for shipment.

[0033] It is also contemplated that the lid assembly 14 described above may be coupled to any open-top box structure. Referring now to FIG. 5, another embodiment of the lid assembly 14 is shown. The lid assembly 14 includes a coupling panel 40 which is used to attach the lid assembly to any open-top box 11. Various well-known methods, including tape, adhesive, and pre-applied adhesive, may be used to attach the coupling panel 40 to the open-top box 11. As described above, the lid assembly 14 can be placed in a first configuration suitable for receiving and storing various objects in the open-top box 11, or in a second configuration in which the open-top box is sealed by the lid assembly 14 and suitable for shipment.

[0034] The container described above can be formed from one contiguous blank of substantially rigid material, such as corrugated cardboard, as shown in FIG. 6. One of ordinary skill in the art, however, would recognize that any substantially rigid material that is suitable for shipping can be used in accordance with the teachings herein.

[0035] In FIG. 6, the solid lines between panels indicate that cuts separate the panels and dotted lines between panels indicate fold lines. As illustrated, the blank 50 has a first plurality of contiguous panels 51 and a second plurality of contiguous panels 52. The first plurality of contiguous panels 51 can be folded to form open-top box portion 11 having an upper edge 12 and a top flap 13. The second plurality of contiguous panels 52 is attached to the first plurality of contiguous panels 51 at upper edge 12 along fold line 61. The second plurality of contiguous panels 52 can be folded to form the lid assembly 14. As described above, the lid assembly 14 has a first configuration suitable for receiving and storing various objects in the open-top box portion 11 and has a second configuration in which the open-top box portion 11 is sealed by the lid assembly 14 and suitable for shipment.

[0036] Blank 50 may be produced on a commercial scale according to well-known methods of die cutting. For example, a mechanical press may be configured with a die shaped to cut out blank 50. The mechanical press could then be used to cut out blank 50 from sheets of the desired material passing underneath the mechanical press.

[0037] According to another aspect of the disclosure, container 10 can be thermally protected, for example by applying a flame-retardant treatment thereto. In embodiments, the flame-retardant treatment includes a thermally protective lining that is applied to at least a portion of the interior surface of container 10 (that is, the surface of container 10 facing the contents thereof).

[0038] For instance, a thermally protective lining can be formed by pelletizing polyethylene terephthalate (PET) (desirably including up to about 50% post-consumer PET), heating the pelletized PET, and extruding it into fibers that can be thermally-formed and needle-punched into sheets. The resulting PET sheets can be die cut to the desired shape and size and applied to the interior of container 10 (e.g., attached via adhesive to relevant surfaces of blank 50).

[0039] Such a PET-based thermally protective lining performed well in testing. In a first test, a selection of rechargeable batteries was placed in a container lined with a PET-based thermally protective lining. Thermal runaway was induced in a lithium ion (lithium cobalt oxide) ignitor cell within the container. Although the ignitor cell exploded with flame, the thermal event was contained (e.g., no flames exited the container, which remained intact throughout the thermal runaway event).

[0040] In a second test, a selection of rechargeable batteries was placed in a container lined with a PET-based thermally protective lining. Thermal runaway was induced in a lithium primary (lithium manganese dioxide) ignitor cell within the container. Once again, although the ignitor cell exploded with flame, the thermal event was contained (e.g., no flames exited the container, which remained intact throughout the thermal runaway event).

[0041] Another suitable material for use as a thermally protective lining is Durapad polyester, available from Marves Industries of Hildebran, N.C.

[0042] As an alternative or in addition to a thermally protective lining, the material of container 10 can be chemically treated with a flame retardant. For instance, a flame-retardant chemical, such as Spectra-Guard FR-Kote flame retardant coating from Spectra-Kote Corporation of Gettysburg, Pa., can be added to the corrugated slurry during pre-production (e.g., during manufacture of blank 50). As another example, a flame-retardant chemical, such as S320 fire retardant coating from Nochar Inc. of Indianapolis, Indiana, can be sprayed on container 10 (e.g., on blank 50).

[0043] Although several embodiments are described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the spirit or scope of this disclosure.

[0044] For example, although thermally protected containers having certain physical configurations are described herein, such description is only by way of example and illustration. It is expressly contemplated that the teachings herein regarding thermal protection can be applied to containers having other physical configurations without departing from the scope of the instant disclosure.

[0045] All directional references (e.g., upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above, below, vertical, horizontal, clockwise, and counterclockwise) are only used for identification purposes to aid the reader's understanding of the present invention, and do not create limitations, particularly as to the position, orientation, or use of the invention. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. As such, joinder references do not necessarily infer that two elements are directly connected and in fixed relation to each other.

[0046] It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the spirit of the invention as defined in the appended claims.