Container having enhanced wall integrity and alignment element

Abstract

A container having enhanced wall integrity and a rotational element is provided that includes a sidewall having polygonal cross-sectional shape and an alignment structure formed therein. The alignment structure is adapted for orienting the container with respect to a second container such that the panel sections of the containers become parallel with one another and the containers may be fully nested one within the other. The alignment structure can be recessed into the sidewall to form peaks and valleys along an inner surface of the container. The peaks include first and second faces sloping in opposite directions designed to direct corners of the first container's sidewall toward the interior valleys of the second container in order to orient the containers as they are stacked.

Claims

1. A container comprising: a bottom wall; a frustoconical sidewall extending upward from said bottom wall, said sidewall including a plurality of axially-extending alignment structures circumferentially spaced around said sidewall and extending at least a portion of a height of said sidewall; an exterior surface of said sidewall; and an interior surface of said sidewall, said interior surface radially and axially conforming to said exterior surface of said sidewall; wherein each of said axially-extending alignment structures comprises first and second oppositely-sloping faces, said faces intersecting along a longitudinally-extending apex; wherein each of said axially-extending alignment structures further comprises an indention extending around said first and second oppositely-sloping faces; wherein said indention of each of said plurality of axially-extending alignment structures is recessed into said sidewall and forms into said sidewall a v-shaped lower edge of said axially-extending alignment structure; wherein said v-shaped lower edges of said axially-extending alignment structures are spaced from said bottom wall; wherein said v-shaped lower edges are circumferentially aligned with said sidewall and extend radially outward to a diameter equal to a diameter of said sidewall along a height of said sidewall equal to a height of said v-shaped lower edges; wherein said container is capable of being fully nested within a second identical container; wherein said axially-extending alignment structures having said v-shaped lower edges are adapted for causing rotational movement of said container with respect to said second container about a longitudinal axis as the two containers are stacked one within the other; the container further comprising a plurality of peaks, each said peak being positioned between two said alignment structures; wherein said apexes, said peaks, and said indentions therebetween form a wave structure.

2. The container of claim 1, wherein said plurality of axially-extending alignment structures form a plurality of intermittent peaks on said exterior surface of said sidewall corresponding to a plurality of intermittent valleys in said interior surface of said sidewall.

3. The container of claim 2, wherein said first and second faces of each said alignment structure protrude outwardly to form a said peak on said exterior surface of said sidewall.

4. The container of claim 2, wherein said indention of each of said axially-extending alignment structures exists on each side of each said peak on said exterior surface of said sidewall.

5. The container of claim 2, wherein said intermittent peaks on said exterior surface of said sidewall of said container are configured for being received by said intermittent valleys in said interior surface of said sidewall of said second container when said container is nested within said second container.

6. A container comprising: a bottom wall; a circumferential sidewall extending upward from said bottom wall, said sidewall having an interior surface that corresponds and conforms to an exterior surface of said sidewall; and a plurality of axially-extending alignment structures defined in said sidewall and circumferentially spaced around said sidewall, wherein each axially-extending alignment structure is orientated longitudinally and has a v-shaped lower edge; wherein said v-shaped lower edges of said axially-extending alignment structures are spaced from said bottom wall; wherein each axially-extending alignment structure contains two oppositely-sloped faces orientated longitudinally and a longitudinal apex located at an intersection of said two oppositely-sloped faces, and an indention recessed into said sidewall and extending around said two oppositely-sloped faces and forming said v-shaped lower edge of said axially-extending alignment structure into said sidewall; wherein said v-shaped lower edges are circumferentially aligned with said sidewall and extend radially outward to a diameter equal to a diameter of said sidewall along a height of said sidewall equal to a height of said v-shaped lower edges; wherein said two oppositely-sloped faces of each axially-extending alignment structure extend axially outward relative to said sidewall in the direction of said longitudinal apex forming first peaks along said longitudinal apexes of said axially-extending alignment structures on said exterior surface of said sidewall and valleys along said longitudinal apexes of said axially-extending alignment structures on said interior surface of said sidewall; wherein said container is capable of being fully nested within a second identical container; wherein said axially-extending alignment structures having said v-shaped lower edges are adapted for causing rotational movement of said container with respect to said second container about a longitudinal axis as the two containers are stacked one within the other; the container further comprising a plurality of second peaks, each of said second peaks being positioned between two said alignment structures; wherein said first peaks, said second peaks, and said indentions therebetween form a wave structure.

7. A container comprising: a bottom wall; a frustoconical sidewall extending upward from said bottom wall, said sidewall including a plurality of axially-extending alignment structures circumferentially spaced around said sidewall and extending at least a portion of a height of said sidewall; a plurality of peaks, each said peak being positioned between two said alignment structures; an exterior surface of said sidewall; and an interior surface of said sidewall, said interior surface radially and axially conforming to said exterior surface of said sidewall; wherein each of said axially-extending alignment structures comprises first and second oppositely-sloping faces, said faces intersecting along a longitudinally-extending apex; wherein each of said axially-extending alignment structures further comprises an indention extending around said first and second oppositely-sloping faces; wherein said indention of each of said plurality of axially-extending alignment structures is recessed into said sidewall and forms into said sidewall a v-shaped lower edge of said axially-extending alignment structure; wherein said apexes, said peaks, and said indentions therebetween form a wave structure; wherein said container is capable of being fully nested within a second identical container; wherein said axially-extending alignment structures having said v-shaped lower edges are adapted for causing rotational movement of said container with respect to said second container about a longitudinal axis as the two containers are stacked one within the other.

8. The container of claim 7, wherein said v-shaped lower edges of said axially-extending alignment structures are spaced from said bottom wall.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) In the accompanying drawings, which form a part of the specification and are to be read in conjunction therewith in which like reference numerals are used to indicate like or similar parts in the various views:

(2) FIG. 1 is a side perspective view of a container in accordance with a preferred embodiment of the present invention;

(3) FIG. 2A is a side perspective view of two partially nested containers having their respective panel sections angularly offset from one another in accordance with a preferred embodiment of the present invention;

(4) FIG. 2B is a sectional view of the containers of FIG. 2A taken generally along line 2B-2B in the direction of the arrows in accordance with a preferred embodiment of the present invention;

(5) FIG. 3A is a side perspective view of two partially nested containers having their respective panel sections parallel with one another in accordance with a preferred embodiment of the present invention;

(6) FIG. 3B is a sectional view of the containers of FIG. 3A taken generally along line 3B-3B in the direction of the arrows in accordance with a preferred embodiment of the present invention;

(7) FIG. 4 is a side perspective view of a container having identical finger structures in accordance with a preferred embodiment of the present invention;

(8) FIG. 5 is a side perspective view of a container having indentions in accordance with a preferred embodiment of the present invention;

(9) FIG. 5A is a sectional view of the container of FIG. 5 taken generally along line 5A-5A in the direction of the arrows in accordance with a preferred embodiment of the present invention; and

(10) FIG. 6 is a side perspective view of a container having protrusions in accordance with a preferred embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

(11) The invention will now be described with reference to the drawing figures, in which like reference numerals refer to like parts throughout. For purposes of clarity in illustrating the characteristics of the present invention, proportional relationships of the elements have not necessarily been maintained in the drawing figures.

(12) A storage container 10 embodying various features of the present invention is shown in the figures. The container 10 may be suitable for holding food and beverage products or any other goods or products that would typically be held within a container. In a first embodiment, as shown generally in FIGS. 1-3B, the container 10 includes a circumferential sidewall 12 extending upwardly from a bottom wall 14. The sidewall has interior and exterior surfaces 22 and 26. An annular rolled rim or lip 18 may be provided at the top end of the sidewall 12 to form a comfortable drinking surface for the mouth of a user, may provide rigidity to the top of the container 10 and, optionally, for attaching a lid (not shown) to the container 10.

(13) The container 10 preferably is an open-ended container of any suitable size, shape and configuration. In one embodiment, the container 10 has a frustoconical shape; that is, the container 10 has a generally circular cross-section decreasing in diameter as the sidewall 12 tapers from top to bottom such that the top open mouth 16 is generally larger than the bottom wall 14. The upwardly and outwardly taper of the container 10 provides a means for stacking a plurality of containers 10, as illustrated in FIGS. 2A-3B. It will be appreciated, however, by those skilled in the art that different shapes may serve equally as well and may be required by a desired application. The container 10 may be manufactured of a thin polymeric, non-polymeric or plastic material and in manner utilizing a thermoforming process as is typically known in the art. As such, the container 10 can be made of materials such as polyethylene, polypropylene, polyester, polystyrene or another suitable material now known or hereafter developed.

(14) In order to increase the structural rigidity and integrity of the sidewall 12, as compared to commonly-known round containers, the sidewall 12 may have a generally symmetrical polygonal cross-sectional shape. This sidewall 12 structure increases the strength and rigidity of the sidewall 12, allowing the sidewall 12 to be made thinner, thereby potentially reducing the container's 10 weight and cost. The sidewall's 12 cross-sectional shape may take a variety of shapes, including but not limited to, octagonal, nonagonal, decagonal, hendecagonal, dodecagonal or any other suitable polygonal shape.

(15) The sidewall 12 may be formed of a plurality of generally rectangular-shaped panel sections 20 extending upwardly from the container's bottom wall 14. As set forth above and shown in the figures, the sidewall 12 has an upwardly and outwardly taper allowing a plurality of containers 10 to be stacked or nested together during shipping and storage. The sidewall 12 may be of any suitable size, shape and configuration. As such, in one embodiment, each sidewall panel section 20 is in the shape of an isosceles trapezoid in order for the container 10 to have a generally frustoconical shape. Similar to the sidewall 12, panel sections 20 are each tapered such that they are wider at their top ends and narrower at their lower ends.

(16) When a plurality of containers 10 having polygonal sidewalls 12 are stacked one on top of the other, it is generally preferred that the respective sidewall panel sections 20 of the containers 10, particularly those of two adjacently-stacked containers 10, are aligned parallel with one another so that the containers 10 become fully nested one within the other. However, when such containers 10 are stacked, it is common that the two adjacently-stacked containers 10 will be oriented in a manner such that their respective sidewall panel sections 20 are not aligned parallel to each other. In such a case, the containers 10 cannot become fully nested. When this happens, the stack of containers 10 may be more susceptible to tipping and will take up more space than if all of the containers 10 were fully nested. Additionally, it can result in multiple containers sticking together during the manufacturing process or when a user intends to grab only one container from the stack. Thus, it is desirable for the respective panel sections 20 of adjacently-stacked containers 10 to be aligned.

(17) As illustrated in FIG. 1, the container 10 includes at least one generally axially-extending rotational element or alignment structure 30 associated with one or more of the sidewall panel sections 20 for urging misaligned containers 10 to become aligned. In doing so, the alignment structure 30 is adapted to cause one container 10 to rotate and orient itself with respect to a second container 10 about a longitudinal axis A-A as the two containers 10 are being stacked.

(18) As shown in FIGS. 2A and 2B, when one container 10a is partially inserted within another generally identical container 10b during the stacking process, the two containers 10a and 10b may not be aligned with one another as described above. In FIG. 2B, one of the panel sections 20 of one container 10a lies in plane A while the respective panel section of the other container 10b lies in plane B. As demonstrated, the two containers 10a and 10b are axially misaligned from one another by an angle α. Absent the alignment structure 30, the two containers 10a and 10b would not rotate axially with respect to one another and therefore would never become fully nested.

(19) As shown in FIGS. 1-3B, the container 10 may include ribs 28 protruding outwardly from the corners formed at the intersections of adjacent sidewall panel sections 20. In another embodiment, the container does not include such ribs 28 protruding from its corners.

(20) In the embodiment illustrated in FIGS. 1-3B, the alignment structures 30 of container 10 are at least partially recessed within the sidewall 12. In other words, the alignment structures 30 are indented into the exterior surface 26 of the sidewall 12 and, thus, correspondingly protrude inwardly from the inner surface 22 of the sidewall 12 into the interior of the container 10. The alignment structures 30 can each be shaped to include a boundary edge 36, which may protrude outwardly from the exterior surface 26 of the sidewall 12 and form a v-shaped lower edge 36. As shown in FIGS. 2B and 3B, because the alignment structure 30 is recessed into the sidewall 12, a resulting alternating series of generally radially intermittent, circumferentially-spaced peaks 38 and valleys 40 are formed into the interior surface 22 of the sidewall 12. Each interior peak 38 is divided to include first and second faces 42 and 44 sloping in opposite directions. Due to its formation into the sidewall 12, the alignment structure 30 also results in an alternating series of generally circumferentially-spaced peaks 46 and valleys 48 formed into the exterior surface 22 of the sidewall 12.

(21) The alignment structure 30 urges one container 10a (or container 10b, as the case may be) to rotate with respect to an adjacently stacked container 10b (or container 10a, as the case may be). It should be understood that the containers 10 may be stacked in an upright orientation, such that one container 10b is placed within another container 10a, or stacked in an upside-down orientation, such that one container 10a is placed over another container 10b. The alignment structures 30 are designed to cause rotational movement of one container 10 with respect to another container 10 until and to the point where the respective sidewall panel sections 20 of the containers 10 are generally aligned parallel with one another as shown in FIGS. 3A and 3B. As one container 10b is inserted into another container 10a, the corners (or the ribs 28 protruding therefrom) of the first container 10b engage the interior peaks 38 of the second container 10a. As described above, the peaks 38 each have first and second faces 42 and 44 meeting at an apex and sloping away from one another. The apex of each peak 38 splits the peak 38 and causes the corner (or protruding rib 28) of the other container to engage either the first face 42 or second face 44 of the peak 38.

(22) FIGS. 2A and 2B illustrates one container 10a partially inserted within another container 10b during the stacking process, wherein the two containers 10a and 10b are not be aligned with one another. The ribs 28 of container 10b contact the interior peaks 38 of container 10a as the two containers 10a and 10b are stacked. The ribs 38 are directed to either the first faces 42 or second faces 44 of the peaks 38. If the ribs 28 engage the first faces 42, then container 10b will rotate clockwise (as shown from this angle) with respect to container 10b as the two containers 10a and 10b become stacked. If the ribs 28 engage the second faces 44, then container 10b will rotate counter-clockwise (as shown from this angle) with respect to container 10b as the two containers 10a and 10b become stacked. Such rotation will continue to the point where the respective sidewall panel sections 20 of the containers 10a and 10b are substantially aligned parallel with one another, as shown in FIGS. 3A and 3B. In this sense, the containers 10 are adapted to be generally self-aligning. Consequently, little or no manipulation may be required for the containers 10 to properly nest.

(23) As demonstrated in FIG. 3B, when the respective sidewall panel sections 20 of the containers 10a and 10b are aligned parallel with one another, the corners or ribs 28 of container 10b are generally received within the valleys 40 of container 10a. Once the containers 10a and 10b are aligned with one another, as shown in FIGS. 3A and 3B, the containers 10a and 10b may become fully nested. The containers 10a and 10b are considered fully nested when the bottom of one container 10b comes into contact with the one or more stacking shoulders 24 indented into the other container 10a.

(24) The alignment structure 30 may have a parabolic-like shape, as shown in FIG. 1, a curvilinear shape or any other shape suitable for achieving the alignment outcome described herein. The alignment structure 30 may be either recessed into the sidewall 12, protruding outwardly from the sidewall 12 or both recessed into and protruding outwardly from the sidewall 12. In one embodiment, the container 10 includes some alignment structures 30 which are recessed into the sidewall 12 and some alignment structures 30 that are protruding therefrom. The alignment structure 30 can increase the structural rigidity and integrity of the sidewall 12 and can provide the sidewall 12 with contoured edges which aid a user in gripping the container 10.

(25) Turning now to another embodiment, FIG. 4 shows a container 10 having an alignment structure 50 that comprises a plurality of circumferentially-spaced fingers 52 that may be recessed into or protruding from the container's sidewall 12. In the illustrated embodiment, the fingers 52 are indented into the sidewall 12 and extend inwardly into an interior of the container 10. The indented fingers 52 form radially intermittent peaks 58 and valleys 60 along the inner surface 22 of the sidewall 12. They also form corresponding peaks 62 and valleys 64 along the outer surface 26 of the sidewall 12. The fingers 52 have first and second ends 54 and 56. In FIG. 4, the fingers 52, which form the peaks 60 along the inner surface 22 of the sidewall 12, are tapered and decrease in width from a wider first (lower) end 54 to a narrower distal second (upper) end 56. Correspondingly, the valleys 60 along the inner surface 22 of the sidewall 12 are tapered and increase in width from a narrower lower (not shown) end to a wider upper end 61.

(26) The valleys 60 formed into the inner surface 22 of the sidewall 12 of one container are adapted for receiving the peaks 62 protruding from the outer surface 26 of a second generally identical container (not shown) when the second container is placed within the container 10. Likewise, the valleys 64 formed into the outer surface 26 of the sidewall 12 of one container are adapted for receiving the peaks 58 formed into the inner surface 22 of a second generally identical container (not shown) when the second container is placed within the container 10. As the containers 10 are stacked together, the narrow ends of the peaks 58 and 62 engage the wide ends of the valleys 64 and 60, respectively. This engagement of the tapered peaks 58 and 62 and tapered valleys 64 and 60 aligns the two containers as they move closer together during the stacking process such that the sidewall panel sections 20 of the containers are aligned substantially parallel to one another. Like alignment structures 30, alignment structures 50 can increase the structural rigidity and integrity of the sidewall 12 and can provide the sidewall 12 with contoured edges which aid a user in gripping the container 10.

(27) FIGS. 5 and 5A show yet another embodiment of a container 10 including an alignment structure 66 comprising a plurality of circumferentially-spaced indentions 68. The indentions 68 form a parabolic-like shape and have a v-shaped lower edge 70. The v-shaped lower edges 70 of said alignment structures 66 are spaced from said bottom wall 14, are circumferentially aligned with said sidewall 12 and extend radially outward to a diameter equal to a diameter of said sidewall 12 along a height of said sidewall 12 equal to a height of said v-shaped lower edges 70. Because the alignment structure 66 is recessed into the sidewall 12, a resulting alternating series of generally radially intermittent, circumferentially-spaced peaks 72 and valleys 74 are formed into the interior surface 22 of the sidewall 12. Due to its formation into the sidewall 12, the alignment structure 66 also results in an alternating series of generally circumferentially-spaced peaks 76 and valleys 78 formed into the exterior surface 26 of the sidewall 12. Such a design allows for more stacking alignment opportunities as the container 10 may include more peaks and valleys 72, 74, 76 and 78 than compared with other containers. For example, in one embodiment, the container 10 includes approximately 20 or more peaks 72 and 76 and the same number of corresponding valleys 74 and 78. Such an embodiment generally requires the container 10 to undergo less rotation in order to become aligned with an adjacent container 10 than embodiments having fewer alignment structures that are spaced radially further apart from one another. In principal, the alignment structure 66 of this embodiment operates in a manner similar to the alignment structure 30 of the first embodiment described above in order to align the containers together as they are stacked. Like the other embodiments described above, the alignment structure 66 can increase the structural rigidity and integrity of the sidewall 12 and can provide the sidewall 12 with contoured edges which aid a user in gripping the container 10. The container 10 of FIGS. 5 and 5A further having a plurality of second peaks, each of said second peaks positioned between two alignment structures 66, wherein said peaks 72, second peaks, and indentions 68 therebetween form a wave structure.

(28) FIG. 6 illustrates a further embodiment of a container 10 having an alignment structure 80 comprising a generally parabolic-shape protrusion 82 extending from each sidewall panel section 20. The protrusions 82 include an exterior surface 84 extending or bulging from the outer surface 26 of the panel sections 20 and a corresponding interior surface 86 recessed into the inner surface 22 of the panel sections 20 that forms a valley 88. The protrusion may from a v-shaped lower edge 90. In principal, the alignment structure 80 of this embodiment operates in a manner similar to the alignment structures of the other embodiments described above. As one container 10 is being stacked with a second generally identical container (not shown), the protrusion 82 of the inner container engages the valley 88 of the outer container. As the two containers move closer together during the stacking process, the containers become aligned such that the sidewall panel sections 20 of the containers are aligned substantially parallel to one another. Like all the other embodiments described herein, the alignment structure 80 can also increase the structural rigidity and integrity of the sidewall 12 and can provide the sidewall 12 with contoured edges which aid a user in gripping the container 10.

(29) From the foregoing it will be seen that this invention is one well adapted to attain all ends and objects hereinabove set forth together with the other advantages which are obvious and which are inherent to the structure.

(30) It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.

(31) Since many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative, and not in a limiting sense.