Patent Grant
RE49894
This application is a Reissue of U.S. patent application Ser. No. 10,882,657, which issued on Jan. 5, 2021, from U.S. patent application Ser. No. 15/428,770, filed Feb. 9, 2017, which application claims the benefit of priority under 35 U.S.C. § 119(e) of U.S. provisional application Ser. No. 62/293,856 filed on Feb. 11, 2016, each of which is hereby incorporated by reference in its entirety.
This disclosure relates generally to containers formed from blanks of sheet material, and, more specifically, to a blank of sheet material for forming a crush-tolerant container, and methods for forming the container.
Corrugated board containers are often used to hold products therein, and are frequently stacked during shipping and storage of those products. At least some known containers are configured such that the side walls must hold the weight of the containers(s) stacked thereupon. If the weight on the bottommost container(s) increases to the point that the sidewalls fail (i.e., collapse inwards or outwards relative to the interior of the container), and the products inside may be damaged or crushed. At least some known containers are manufactured to include double- or triple-ply walls to increase the stacking strength thereof, but such an approach necessitates the use of more blank material, which increases the cost of the container.
In one aspect, a blank for constructing a crush-tolerant container is provided. The blank includes a plurality of panels coupled together in series along substantially parallel fold lines, the plurality of panels including a first side panel, a bottom panel, a second side panel, and a top panel. The blank also includes at least one cutout and at least one bridge portion positioned along a first fold line between the top panel and the first side panel. The at least one bridge portion is configured to maintain the top panel in a plane spaced above a top edge of the first side panel when the container is formed and the top panel is not under a stacking load. The at least one bridge portion and the at least one cutout are configured to allow the top panel to move downwardly such that at least a portion of the top panel is substantially co-planar with the top edge of the first side panel when the container is formed and the top panel is under the stacking load.
In another aspect, a crush-tolerant container formed from a blank of sheet material is provided. The container includes a top wall, an opposing bottom wall, and two opposing side walls. The top wall, the two side walls, and the bottom wall define a cavity. The container further includes a first compression zone defined between the top wall and a first side wall of the two side walls. The first compression zone includes a first cutout and at least a first bridge portion. The first compression zone maintains the top wall in a first plane separated from a top edge of the first side wall by a compression depth when the top wall is not under a stacking load, and the first compression zone is configured to enable displacement of the top wall toward the cavity by the compression depth when the top wall is under the stacking load.
In yet another aspect, a method for forming a crush-tolerant container from a blank of sheet material is provided. The blank includes a plurality of panels coupled together in a series along substantially parallel fold lines. The plurality of panels includes a top panel, a first side panel, a bottom panel, a second side panel, and a glue flap. The blank further includes at least one cutout and at least one bridge portion positioned along a first fold line between the top panel and the first side panel. The method includes rotating the plurality of panels about the plurality of fold lines to form a plurality of walls of the container, such that the plurality of walls define a cavity, and such that the at least one bridge portion extends between a first side wall and a top wall of the plurality of walls. The method also includes securing the glue flap to the top panel. The at least one bridge portion maintains the top wall in a plane spaced above a top edge of the first side wall by a compression depth when the top wall is not under a stacking load. The at least one bridge portion and the at least one cutout are configured to allow the top wall to move downwardly such that at least a portion of the top panel is substantially co-planar with the top edge of the first side panel when the top wall is under the stacking load.
An assembly of stacked crush-tolerant containers is provided, the assembly including a first crush-tolerant container and a second crush-tolerant container stacked vertically on top of the first container. The first container includes a top wall, an opposing bottom wall, and two opposing side walls. The top wall, the two side walls, and the bottom wall define a cavity. The first container also includes a first compression zone defined between the top wall and a first side wall of the two side walls, the first compression zone including a first cutout and at least a first bridge portion. Under a load of the second container, the first compression zone enables displacement of the top wall toward the cavity of the first container by a compression depth.
The following detailed description illustrates the disclosure by way of example and not by way of limitation. The description clearly enables one skilled in the art to make and use the disclosure, describes several embodiments, adaptations, variations, alternatives, and use of the disclosure, including what is presently believed to be the best mode of carrying out the disclosure.
The embodiments described herein provide a stackable, crush-tolerant container formed from a single sheet of blank material, and a method for constructing the container. The container may be constructed from a blank of sheet material using a machine and/or by hand. In one embodiment, the blank is fabricated from a corrugated cardboard material. The blank, however, may be fabricated using any suitable material, and therefore is not limited to a specific type of material. In alternative embodiments, the blank is fabricated using cardboard, plastic, fiberboard, paperboard, foamboard, corrugated paper, and/or any suitable material known to those skilled in the art and guided by the teachings herein provided.
In an example embodiment, the blank includes at least one marking thereon including, without limitation, indicia that communicates the product, a manufacturer of the product and/or a seller of the product. For example, the marking may include printed text that indicates a product's name and briefly describes the product, logos and/or trademarks that indicate a manufacturer and/or seller of the product, and/or designs and/or ornamentation that attract attention. “Printing,” “printed,” and/or any other form of “print” as used herein may include, but is not limited to including, ink jet printing, laser printing, screen printing, giclée, pen and ink, painting, offset lithography, flexography, relief print, rotogravure, dye transfer, and/or any suitable printing technique known to those skilled in the art and guided by the teachings herein provided. In another embodiment, the blank is void of markings, such as, without limitation, indicia that communicates the product, a manufacturer of the product and/or a seller of the product.
Referring now to the drawings, and more specifically to
Blank 10 has a first or interior surface 12 and an opposing second or exterior surface 14. Further, blank 10 defines a leading edge 16 and an opposing trailing edge 18. In one embodiment, blank 10 includes, in series from leading edge 16 to trailing edge 18, a plurality of panels including a first side panel 20, a bottom panel 22, a second side panel 24, a top panel 26, and a glue flap 28, coupled together along preformed, generally parallel, fold lines 30, 32, 34, and 36, respectively. More specifically, first side panel 20 extends between leading edge 16 and fold line 30, bottom panel 22 extends from fold line 30, second side panel 24 extends from fold line 32, top panel 26 extends from fold line 34, and glue flap 28 extends between fold line 36 and trailing edge 18. In an alternative embodiment, glue flap 28 extends from first side panel 20 opposite bottom panel 22.
Fold lines 30, 32, 34, and 36, as well as other fold lines and/or hinge lines described herein, may include any suitable line of weakening and/or line of separation known to those skilled in the art and guided by the teachings herein provided.
In the example embodiment, first side panel 20 and second side panel 24 are substantially congruent and have a rectangular shape, and bottom panel 22 and top panel 26 are substantially congruent and have a rectangular shape. In alternate embodiments, panels 20, 22, 24, and 26 have any suitable shape that enables blank 10 to function as described herein. Moreover, first side panel 20 and second side panel 24 each have a width W1, and bottom panel 22 and top panel 26 each have a width W2 that is less than W1. In alternative embodiments, W2 is substantially equal to or greater than W1.
In addition, blank 10 includes a plurality of end flaps extending from the plurality of panels. More specifically, a first major end flap 40 extends from a first end edge of first side panel 20 defined by a fold line 41, and a second major end flap 42 extends from a second end edge of first side panel 20 defined by fold line 43. A third major end flap 44 extends from a first end edge of second side panel 24 defined by a fold line 45, and a fourth major end flap 46 extends from a second end edge of second side panel 24 defined by a fold line 47. In the example embodiment, first major end flap 40, second major end flap 42, third major end flap 44, and fourth major end flap 46 are substantially congruent. In alternative embodiments, at least one of major end flap 40, 42, 44, and 46 is other than substantially congruent to at least one other of major end flaps 40, 42, 44, and 46.
A first minor end flap 50 extends from a first end edge of bottom panel 22 defined by a fold line 51, and a second minor end flap 52 extends from a second end edge of bottom panel 22 defined by a fold line 53. A third minor end flap 54 extends from a first end edge of top panel 26 defined by a fold line 55, and a fourth minor end flap 56 extends from a second end edge of top panel 26 defined by a fold line 57. In the example embodiment, first minor end flap 50, second minor end flap 52, third minor end flap 54, and fourth minor end flap 56 are substantially congruent. In alternative embodiments, at least one of minor end flap 50, 52, 54, and 56 is other than substantially congruent to at least one other of minor end flaps 50, 52, 54, and 56. In the example embodiment, fold lines 41, 43, 45, 47, 51, 53, 55, and 57 are generally parallel to each other and generally perpendicular to fold lines 30, 32, 34, and 36.
Blank 10 further includes a plurality of cutouts 60. In the example embodiment, each of cutouts 60 is defined along one of fold lines 30, 32, 34, and 36. More specifically, each of cutouts 60 extends symmetrically from one of fold lines 30, 32, 34, 36 into the adjacent ones of panels 20, 22, 24, 26, and 28. In the example embodiment, a pair of congruent cutouts 60 is disposed along each of fold lines 30, 32, 34, and 36. More particularly, two cutouts 65 and 66 are disposed along fold line 30 and extend into first side panel 20 and bottom panel 22, two cutouts 67 and 68 are disposed along fold line 32 and extend into bottom panel 22 and second side panel 24, two cutouts 69 and 70 are disposed along fold line 34 and extend into second side panel 24 and top panel 26, and two cutouts 71 and 72 are disposed along fold line 36 and extend into top panel 26 and glue flap 28. In an alternative embodiment in which glue flap 28 extends from first side panel 20, cutouts 71 and 72 are disposed along a fold line between glue flap 28 and first side panel 20 and extend into glue flap 28 and first side panel 20. It should be understood that any reference to cutouts 60 refers generally and collectively to cutouts 65, 66, 67, 68, 69, 70, 71, and 72. In the illustrated embodiment, cutouts 60 are arranged symmetrically about a longitudinal axis 64 of blank 10, thereby defining bridge portions 61 along fold lines 30, 32, 34, and 36. Accordingly, in the example embodiment, blank 10 includes eight cutouts 60 and twelve bridge portions 61, wherein two cutouts 60 and three bridge portions 61 are disposed along fold lines 30, 32, 34, and 36. In other embodiments, blank 10 includes additional, fewer, or differently arranged cutouts and/or no cutouts along one or more of fold lines 30, 32, 34, and/or 36. For example, in alternative embodiments, cutouts 60 are not arranged symmetrically about longitudinal axis 64.
In the example embodiment, each end flap 40, 42, 44, 46, 50, 52, 54, and 56 includes a pair of opposing side edges. More specifically, first major end flap 40 includes opposing side edges 73 and 74, second major end flap 42 includes opposing side edges 75 and 76, first minor end flap 50 includes opposing side edges 77 and 78, second minor end flap 52 includes opposing side edges 79 and 80, third major end flap 44 includes opposing side edges 81 and 82, fourth major end flap 46 includes opposing side edges 83 and 84, third minor end flap 54 includes opposing side edge 85 and 86, and fourth minor end flap 56 include opposing side edge 87 and 88. Adjacent side edges of end flaps 40, 42, 44, 46, 50, 52, 54, and 56 are spaced apart from one another by a distance d, which is measured between adjacent side edges. For example, side edge 76 of second major end flap 42 is spaced apart from side edge 79 of second minor end flap 52 by distance d.
In the illustrated embodiment, cutouts 60 have a width W3 that is approximately equal to distance d, and defined parallel to a direction 62 of internal, corrugated flutes 98 (shown in
A top edge of first side panel 20 is defined by leading edge 16. Cutouts 65 and 66 and fold line 30 collectively define a bottom edge 21 of first side panel 20 and a first side edge 23 of bottom panel 22. Cutouts 67 and 68 and fold line 32 collectively define a second side edge 25 of bottom panel 22 and a bottom edge 27 of second side panel 24. Cutouts 69 and 70 and fold line 34 collectively define a top edge 29 of second side panel 24 and a first side edge 31 of top panel 26. Cutouts 71 and 72 and fold line 36 collectively define a second side edge 33 of top panel 26 and a side edge 35 of glue flap 28. Trailing edge 18 defines a free edge of glue flap 28. Moreover, when container 100 is formed from blank 10, as shown in
Container 100 includes a top wall 102, a first side wall 104, a bottom wall 106, a second side wall 108, a first end wall 110 (shown in
In the example embodiment, top wall 102 includes top panel 26, first side wall 104 includes first side panel 20 and glue flap 28, bottom wall 106 includes bottom panel 22, and second side wall 108 includes second side panel 24. First end wall 110 includes first major end flap 40, third major end flap 44, first minor end flap 50, and third minor end flap 54. Second end wall includes second major end flap 42, fourth major end flap 46, second minor end flap 52, and fourth minor end flap 56. In an alternative embodiment in which glue flap 28 extends from first side panel 20, top wall 102 includes top panel 26 and glue flap 28, and first side wall includes first side panel 20.
Moreover, when container 100 is formed from blank 10, each of side walls 104 and 108 includes corrugated flutes 98 oriented in a vertical direction 122. Accordingly, side walls 104 and 108 have improved stacking strength as compared to, for example, a container having side walls with horizontally oriented flutes (i.e., flutes oriented perpendicular to direction 122). Additionally, when container 100 is formed from blank 10, each of major end flaps 40, 42, 44, and 46 includes corrugated flutes 98 oriented in vertical direction 122.
In the example embodiment, exterior surface 14 of each of first and third major end flaps 40 and 44 is coupled to interior surface 12 of first and third minor end flaps 50 and 54, and similarly, exterior surface 14 of each of second and fourth major end flaps 42 and 46 is coupled to interior surface of second and fourth minor end flaps 52 and 56, such that each of end walls 110 and 112 are configured with the improved stacking strength of major end flaps 40, 42, 44, and 46 due to vertical flutes 98 therein. More specifically, by arranging minor and major end flaps such that the minor end flaps are exterior of the major end flaps, with respect to cavity 120, top panel 26 of top wall 102 rests on (i.e., is disposed directly on top of) major end flaps 40, 42, 44, and 46. In alternative embodiments, at least one of end walls 110 and 112 includes an alternative arrangement of minor and major end flaps.
Container 100 further includes first compression zone 150 at an intersection of top wall 102 and second side wall 108, or more specifically, between a first side edge 124 of top wall 102 and a top edge 126 of second side wall 108. Container 100 includes second compression zone 152 at an intersection of second side wall 108 and bottom wall 106, between a bottom edge 128 of second side wall 108 and a first side edge 130 of bottom wall 106. Container 100 also includes third compression zone 154 at an intersection of bottom wall 106 and first side wall 104, between a second side edge 132 of bottom wall 106 and a bottom edge 134 of first side wall 104. Container 100 further includes fourth compression zone 156 at an intersection of first side wall 104 and top wall 102, between a top edge 136 of first side wall 104 and a second side edge 138 of top wall 102. Each compression zone 150, 152, 154, and 156 extends from first end wall 110 to second end wall 112.
Top wall 102 defines a plane that is separated by a compression depth 160 from top edges 126 and 136 of side walls 108 and 104, respectively, in first and fourth compression zones 150 and 156, when top wall 102 is not under a stacking load. For example, top wall 102 defines a plane that is compression depth 160 of approximately ½ d above top edges 126 and 136 of side walls 108 and 104, respectively, in first and fourth compression zones 150 and 156, under no vertical load. Similarly, bottom wall 106 defines a plane that is separated by compression depth 160 from bottom edges 128 and 136 of side walls 108 and 104, respectively, in second and third compression zones 152 and 154, when top wall 102 is not under the stacking load. Compression zones 150, 152, 154, and 156 are configured to facilitate slight compression or crushing of container 100 under a force exerted substantially vertically on container 100 (i.e., parallel to direction 122), such as under a stacking load exerted when multiple containers 100 including products in cavity 120 are stacked upon one another. The stacking load may include any load or exerted force that exceeds a threshold amount to initiate compression of compression zones 150, 152, 154, and/or 156. The stacking load may vary between containers of different dimensions and/or containers having different numbers and/or orientations of cutouts 60 and bridge portions 61.
As shown in
Accordingly, in either embodiment, top edges 126 and 136 of side walls 104 and 108, respectively, are engaged in supporting the load, thereby engaging the stacking strength of side walls 104 and 108 to support the load on container 100. Bridge portions 61 in second and third compression zones 152 and 154 allow side walls 104 and 108 to be displaced downwards towards bottom wall 106 by compression depth 160. In one embodiment, bridge portions 61 deform, enabling side walls 104 and 108 to shift into position on either side of bottom wall 106, such that at least a portion of bottom edge 128 of second side wall 108 is substantially co-planar with first side edge 130 of bottom wall, and at least a portion of bottom edge 134 of first side wall 104 is substantially co-planar with second side edge 132 of bottom wall 106. In another embodiment, bridge portions 61 deform, with side walls 104 and 108 shifting into a position directly on top of bottom wall 106, such that interior surface of bottom wall 106 is positioned against bottom edges 128 and 134 of side walls 108 and 104, respectively.
In addition, in the example embodiment, as container 100 is vertically compressed (top wall 102 being displaced downwards, side walls 104 and 108 being displaced downwards), interior surface 12 of top wall 102 adjacent fold line 41 engages at least one of major end flaps 40 and 44, and/or interior surface 12 of top wall 102 adjacent fold line 43 engages at least one of major end flaps 42 and 46. Accordingly, at least one of major end flaps 40, 42, 44, and 46 is engaged to support the load on container 100. In the example embodiment, the alignment of side edges of major end flaps 40, 42, 44, 46 with side edges of cutouts 60, as described above with respect to
In containers without compression zones, the side walls are immediately engaged in supporting a full amount of any stacking load and, as such, are vulnerable to buckling or collapsing. By contrast, compression zones 150, 152, 154, and 156 in container 100 absorb an initial impact of a stacking load, such that side walls 104 and 108 and major end flaps 40, 42, 44, 46 of end walls 110 and 112 are not immediately engaged but rather are more incrementally engaged, which improves the integrity and viability of container 100 under heavier stacking loads. Moreover, container 100 is crush-tolerant under increased loads, by permitting initial compression in compression zones 150, 152, 154, and 156 to prevent side-wall buckling. Thus, container 100 exhibits improved stacking strength over other single-walled containers without requiring double- or triple-walled construction.
To form container 100 from blank 10, first side panel 20 is rotated inwardly about fold line 30 toward interior surface 12 of bottom panel 22, into a substantially perpendicular relationship with bottom panel 22. Second side panel 24 is rotated inwardly about fold line 32 into a substantially perpendicular relationship with bottom panel 22, and top panel 26 is rotated inwardly about fold line 34 into a substantially perpendicular relationship with second side panel 24. Glue flap 28 is coupled to first side panel 20, using, for example, adhesive, another suitable bonding material, fasteners, and/or any other suitable method for attaching panels. In the example embodiment, exterior surface 14 of glue flap 28 is coupled to interior surface 12 of first side panel 20. In an alternative embodiment, interior surface 12 of glue flap 28 is coupled to exterior surface 14 of first side panel 20.
In addition, each of end flaps 40, 42, 44, 46, 50, 52, 54, 56 is rotated inwardly into a substantially perpendicular relationship with the respective panel 20, 22, 24, 26 from which the end flap extends. First and third minor end flaps 50 and 54 are placed into face-to-face relationship with first and third major end flaps 40 and 44, and second and fourth minor end flaps 52 and 56 are placed into face-to-face relationship with second and fourth major end flaps 42 and 46. First and third minor end flaps 50 and 54 are then coupled to first and third major end flaps 40 and 44 as described above, and second and fourth minor end flaps 52 and 56 are coupled to second and fourth major end flaps 42 and 46 as described above, using, for example, adhesive, another suitable bonding material, fasteners, and/or any other suitable method for attaching panels.
Exemplary embodiments of blanks, containers, and methods, are described and/or illustrated herein in detail. The blanks, containers, and methods are not limited to the specific embodiments described herein, but rather, elements of each blank and container and steps of each method may be utilized independently and separately from other elements and steps described herein. Each blank and container element and each method step can also be used in combination with other blank and container elements and/or method steps.
When introducing elements, components, etc. of the methods and assemblies described and/or illustrated herein, the articles “a”, “an”, “the” and “said” are intended to mean that there are one or more of the element(s), component(s), etc. The terms “comprising”, “including” and “having” are intended to be inclusive and mean that there may be additional element(s), component(s), etc. other than the listed element(s), component(s), etc.
This written description uses examples to disclose the embodiments of the present disclosure, including the best mode, and also to enable any person skilled in the art to practice embodiments of the present disclosure, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the embodiments described herein is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
| Number | Name | Date | Kind |
|---|---|---|---|
| 1329531 | Kitt | Feb 1920 | A |
| 2721689 | Nye | Oct 1955 | A |
| 3899123 | Stollberg | Aug 1975 | A |
| 5860590 | Blomfield | Jan 1999 | A |
| 7780067 | Holley, Jr. | Aug 2010 | B2 |
| 8851362 | Aksan | Oct 2014 | B2 |
| 20060278689 | Boshinski | Dec 2006 | A1 |
| 20110036904 | Lopez Masague | Feb 2011 | A1 |
| 20110174655 | Gonn | Jul 2011 | A1 |
| 20140021082 | Holley, Jr. | Jan 2014 | A1 |
| 20140374303 | Martinez | Dec 2014 | A1 |
| 20180297745 | Borek | Oct 2018 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15428770 | Feb 2017 | US |
| Child | 17675981 | US |
