OPPOSING-FOIL PANEL HAVING ONE OR MORE ZONES WITH A DISTRIBUTED INTERCONNECTING STRUCTURE
An opposing-foil panel includes spaced apart planar foils, a first zone between the foils and defining a first zone length in a machine direction and a first zone width extending in a cross-machine direction, normal to the machine direction, across a first portion of the foil width, a plurality of elongated support members affixed to the foils in the first zone and extending along the first zone length and spaced apart along the first zone width, a second zone between the foils adjacent to the first zone and defining a second zone length and a second zone width extending across a second portion of the foil width, and a distributed interconnecting structure affixed to the foils in the second zone and distributed across the second zone width with greater density than the first plurality of elongated support members is distributed across the first zone width.
This patent application claims the benefit of, and priority to, U.S. Provisional Patent Application Ser. No. 62/219,133, filed Sep. 16, 2015, the disclosure of which is incorporated herein by reference in its entirety.
FIELD OF THE INVENTIONThe present invention relates generally to rigid or semi-rigid opposing-foil panels and methods of forming such panels, and more specifically to such panels having one or more zones with a distributed interconnecting structure.
BACKGROUNDConventional opposing-foil panels are used to construct various panel products including, for example, collapsible container sleeves for shipping and/or storage of one or more items. Such sleeves typically have formed therein a number of vertically extending and spaced apart living hinges, and some panels used to make such sleeves typically have complicated designs for supporting the structures and repeated operation of such living hinges, for ensuring adequate bonding of such panels along their edges, and/or for providing high compressive load bearing capacity. Such panels can therefore be expensive to manufacture and to purchase. It is therefore desirable to design and manufacture opposing-foil panels for use in constructing such collapsible sleeves and/or for other uses that will support the structures and repeated operation of living hinges, ensure adequate bonding of such panels along their edges and/or provide one or more zones of high compressive load bearing capacity, yet be more cost efficiently manufactured than conventional opposing-foil panels having one or more such features.
SUMMARYThe present invention may comprise one or more of the features recited in the attached claims, and/or one or more of the following features and combinations thereof. In a first example aspect, an opposing-foil panel may comprise first and second planar foils each defining a foil height extending linearly along a machine direction between first and second foil ends, a foil width extending linearly along a cross-machine direction, normal to the machine direction, between first and second foil sides and an interior surface between the first and second foil ends and the first and second foil sides, the interior surface the first planar foil spaced apart from the interior surface of the second planar foil, a first zone between the first and second planar foils, the first zone defining a first zone length extending along the machine direction and coextensive with the foil height and a first zone width parallel to and extending in the cross-machine direction across a first portion of the foil width, a first plurality of elongated support members affixed to the interior surfaces of the first and second planar foils in the first zone, the first plurality of elongated support members extending along the first zone length in the machine direction and spaced apart along the first zone width in the cross-machine direction, a second zone between the first and second planar foils adjacent to the first zone, the second zone defining a second zone length extending along the machine direction and coextensive with the foil height and a second zone width parallel to and extending in the cross-machine direction across a second portion of the foil width, and a distributed interconnecting structure affixed to the interior surfaces of the first and second planar foils in the second zone and extending along the second zone length in the machine direction, the distributed interconnecting structure including a plurality of support members distributed across the second zone width with greater density than the first plurality of elongated support members is distributed across the first zone width.
A second example aspect includes the subject matter of the first example aspect, and wherein the plurality of support members may comprise a second plurality of elongated support members each affixed to the interior surface of at least one of the first and second planar foils in the second zone, the second plurality of elongated support members extending along the second zone length in the machine direction and spaced apart along the second zone width in the cross-machine direction.
A third example aspect includes the subject matter of the second example aspect, and wherein the first plurality of elongated support members defines a first distance along the first width of the first zone between each adjacent one of the first plurality of elongated support members, and wherein the second plurality of elongated support members defines a second distance along the second width of the second zone between each adjacent one of the second plurality of elongated support members, and wherein the first distance is greater than the second distance.
A fourth example aspect includes the subject matter of the second example aspect, and wherein the distributed interconnecting structure further comprises a first plurality of lateral support members affixed to and between adjacent ones of the second plurality of elongated support members and spaced apart from the interior surfaces of the first and second foils, each of the first plurality of lateral support members extending between adjacent ones of the first plurality of lateral support members in the cross-machine direction and extending along the second zone length in the machine direction.
A fifth example aspect includes the subject matter of the fourth example aspect, and wherein the distributed interconnecting structure may further comprise a second plurality of lateral support members affixed to and between the adjacent ones of the second plurality of elongated support members and spaced apart from the interior surfaces of the first and second foils and from the first plurality of lateral support members, each of the second plurality of lateral support members extending between the adjacent ones of the first plurality of lateral support members in the cross-machine direction and extending along the second zone length in the machine direction.
A sixth example aspect includes the subject matter of the second example aspect, and wherein the second plurality of elongated support members comprises at least one of a plurality of linear or arcuate-shaped ribs.
A seventh example aspect includes the subject matter of the second example aspect, and wherein at least one of the second plurality of elongated support members extends diagonally from the interior surface of at least one of the first and second planar foils along the cross-machine direction.
An eighth example aspect includes the subject matter of the second example aspect, and wherein at least one of the second plurality of elongated support members defines a cylindrical or oval cross-section in the cross-machine direction.
A ninth example aspect includes the subject matter of the second example aspect, and may further comprise an intermediate planar foil disposed between the first and second planar foils, the intermediate planar foil defining a height extending linearly along the machine direction between the first and second foil ends of the first and second planar foils, a width extending linearly along the cross-machine direction between the first and second foil sides of the first and second planar foils, a first planar surface facing the interior surface of the first planar foil and a second planar surface, opposite the first planar surface, facing the interior surface of the second planar foil, wherein a first subset of the second plurality of elongated support members is affixed to and between the interior surface of the first planar foil and the first planar surface of the intermediate planar foil in the second zone, and a second subset of the second plurality of elongated support members is affixed to at least one of the interior surface of the second planar foil and the second planar surface of the intermediate planar foil in the second zone.
A tenth example aspect includes the subject matter of the first example aspect, and wherein the second zone comprises a living hinge zone, and wherein the opposing-foil panel further comprises a living hinge formed along the length of the living hinge zone with the first and second planar foils and at least a portion of the distributed interconnecting structure.
An eleventh example aspect includes the subject matter of the first example aspect, and wherein the second zone comprises an end zone positioned between the first zone and the first or second sides of the first and second planar foils.
A twelfth example aspect includes the subject matter of the first example aspect, and wherein the second zone defines a zone of the panel in which the distributed interconnecting structure provides enhanced deformation resistance, as compared with the first zone, to compressive forces applied to an external surface of at least one of the first and second planar foils.
A thirteenth example aspect includes the subject matter of the first example aspect, and wherein the first zone defines a first volume between the interior surfaces of the first and second planar foils, the first zone length and a portion of first zone width adjacent to the second zone, and the second zone defines a second volume between the interior surfaces of the first and second planar foils, the second zone length and the second zone width, and wherein the first plurality of elongated support members disposed within the first volume defines a first mass of material, and the distributed interconnecting structure disposed within the second volume defines a second mass of material, and wherein the first volume is approximately equal to the second volume and the first mass of material is approximately equal to the second mass of material.
A fourteenth example aspect includes the subject matter of the thirteenth example aspect, and may further comprise a third zone defined between the first and second planar foils, the third zone defining a third zone length extending along the machine direction and coextensive with the foil height and a third zone width parallel to and extending in the cross-machine direction across a third portion of the foil width, the third zone adjacent to the second zone with the second zone disposed between and contiguous with each of the first and third zones, and a third plurality of elongated support members affixed to and between the interior surfaces of the first and second planar foils in the third zone, the third plurality of elongated support members extending along the third zone length in the machine direction and spaced apart along the third zone width in the cross-machine direction, wherein the third zone defines a third volume between the interior surfaces of the first and second planar foils, the third zone length and a portion of the third zone width adjacent to the second zone, and wherein the third plurality of elongated support members disposed within the third volume defines a third mass of material, and wherein the third volume is approximately equal to each of the first and second volumes and the third mass of material is approximately equal to each of the first and second masses of material.
A fifteenth example aspect includes the subject matter of the first example aspect, and wherein the first planar foil, the second planar foil, the first plurality of elongated support members and the distributed interconnecting structure are all of unitary construction.
A sixteenth example aspect includes the subject matter of the first example aspect, and may further comprise a lateral hinge extending in the cross-machine direction between the first and second foil ends along at least a portion of the first zone, the lateral hinge having a first end extending from the at least a portion of the first zone into the second zone and a second end opposite the first end, wherein the opposing-foil panel is separated along a first path extending in the machine direction through the second zone from the first foil end to the first end of the lateral hinge, and wherein the opposing-foil panel is separated along a second path extending in the machine direction from the first foil end to the second end of the lateral hinge to define a pivoting panel between the lateral hinge and the first and second paths.
A seventeenth example aspect includes the subject matter of the sixteenth example aspect, and may further comprise a third zone between the first and second planar foils adjacent to a second side of the at least a portion of the first zone opposite the first side, the third zone defining a third zone length extending along the machine direction and coextensive with the foil height and a third zone width parallel to and extending in the cross-machine direction across a third portion of the foil width, and a second distributed interconnecting structure affixed to the interior surfaces of the first and second planar foils in the third zone and extending along the third zone length in the machine direction, the second distributed interconnecting structure including a plurality of support members distributed across the third zone width with greater density than the first plurality of elongated support members is distributed across the first zone width, wherein the second path extends in the machine direction through the third zone from the first foil end to the second end of the lateral hinge.
In an eighteenth example aspect, an opposing-foil panel may comprise first and second planar foils each defining a foil height extending linearly along a machine direction between first and second foil ends, a foil width extending linearly along a cross-machine direction, normal to the machine direction, between first and second foil sides and an interior surface between the first and second foil ends and the first and second foil sides, the interior surface the first planar foil spaced apart from the interior surface of the second planar foil, a plurality of panel zones between the first and second planar foils each defining a panel zone length extending along the machine direction and coextensive with the foil height and a panel zone width parallel to and extending in the cross-machine direction across a different portion of the foil width, each of the plurality of panel zones including therein multiple elongated support members affixed to the interior surfaces of the first and second planar foils with each of the multiple elongated support members extending along the panel zone length of the corresponding panel zone in the machine direction and spaced apart along the panel zone width of the corresponding panel zone in the cross-machine direction, a plurality of living hinge zones defined between the first and second planar foils and spaced apart along the foil width, each of the plurality of living hinge zones defining a living hinge zone length extending along the machine direction and coextensive with the foil height and a living hinge zone width parallel to and extending in the cross-machine direction across a different portion of the foil width between and adjacent to different ones of the plurality of panel zones, each of the plurality of living hinge zones including therein a distributed interconnecting structure affixed to the interior surfaces of the first and second planar foils and extending along the corresponding living hinge zone length in the machine direction and distributed across the corresponding zone width with greater density than the multiple elongated support members are distributed across the panel widths of each of the plurality of panel zones, and a plurality of living hinges each formed along the length of a different one of the plurality of living hinge zones with the first and second planar foils and at least a portion of the corresponding distributed interconnecting structure.
In a nineteenth example aspect, an opposing-foil panel for a collapsible container sleeve may comprise a first planar foil having a foil height extending and a foil width, a second planar foil also having the foil height and the foil width and spaced apart from the first planar foil, the foil height defining a machine direction parallel therewith and the foil width defining a cross-machine direction parallel therewith, the cross-machine direction normal to the machine direction, the foil width terminating at each of first and second opposite sides of the first and second planar foils to define respective first and second panel sides, a first panel zone defined between the first and second planar foils and having a length extending across the foil height and a width extending along a first portion of the foil width, a first plurality of elongated support members affixed to the opposed interior surfaces of the first and second planar panel members in the first panel zone, each of the first plurality of elongated support members extending across the length of the first panel zone and spaced apart along the width of the first panel zone, a panel end zone defined between the first and second planar foils and having a length extending across the foil length and a width extending along a second portion of the foil width with one side thereof adjacent to the first panel zone and an opposite side thereof terminating at the first panel side, and a distributed interconnecting structure affixed to the opposed interior surfaces of the first and second planar foils along the length of the panel end zone and distributed across the width of the panel end zone with greater density than the first plurality of elongated support members is distributed across the width of the first panel zone, the first panel side being joinable with one of the second panel side and a panel side of another panel to form the collapsible container sleeve.
A twentieth example aspect includes the subject matter of the nineteenth example aspect, and may further comprise a plurality of spaced apart living hinges each extending along the panel in the machine direction.
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to a number of illustrative embodiments shown in the attached drawings and specific language will be used to describe the same. For purposes of this disclosure, the term “living hinge” is defined as a thin flexible hinge or flexure bearing made by thinning an area, or adjacent areas, of a relatively rigid material so the material will bend along a line defined by the hinge.
Referring to the attached figures, an embodiment is shown in
Details of the panel stock 10 and of panels 12 cut or otherwise separated from the panel stock 10 shown in
In one embodiment, the panel stock 10 is of unitary construction and is illustratively provided in the form of a polymer structure fabricated in accordance with a conventional extrusion process. In some such embodiments, the polymer panel stock 10 is a thermoplastic polyolefin, examples of which may be or include, but are not limited to, polypropylene, polyethylene, polymethylpentene, and/or polybutene-1. In alternate embodiments, the panel stock 10 may be formed, in whole or in part, from one or more non-polymer materials, and/or may be formed using one or more processes other than, or in addition to, a conventional extrusion process, and it will be understood that any such alternate panel stock material(s) and/or formation process(es) is/are intended to fall within the scope of this disclosure.
Referring now to
In any case, the panel stock 10 illustrated in
The panel stock 10, and therefore each panel 12, may include any number of living hinge areas or zones positioned at any corresponding number of locations along the panel stock 10 (and panels 12) to establish corresponding hinge locations thereat. In the example embodiment shown in
In some embodiments, the panel 12 is cut or otherwise separated from the panel stock 10 illustrated in
When the panel 12 is cut or otherwise separated from the panel stock 10 illustrated in
A container sleeve 17 of the type and configuration illustrated in
Referring now to
The interconnecting support walls 22 each have a height J defined by the distance between the opposed, interior faces of the panel foils 20A, 20B, a length H defined by the height of the panel 12 and a thickness K1 as illustrated in
The foregoing dimensions of the panel members 20A, 20B, the interconnecting support walls 22 and the spaces 24 between the interconnecting support walls 22 are typically selected based on a number of considerations such as the desired performance characteristics of the panel 12, the weight of the finished panel 12, the cost of producing the panel 12 (including material cost), and/or the like. In one specific example embodiment, the width W2, of the panel 12 is approximately 93 inches, the widths of the areas A-D are approximately 5 inches, 22.5 inches, 48 inches and 17.5 inches respectively and the height H is approximately 45 inches, such that the resulting closed-sided container sleeve 17 illustrated in
It is desirable to provide collapsible container sleeves 17 of the type illustrated in
In the embodiment illustrated in
The interconnecting support members 32 illustrated in
In embodiments in which panels 12 are extruded, either individually or in the form of a continuous panel stock 10 from which individual panels 12 are separated as illustrated in
Thus, in order to promote uniform cooling or curing of the panels 12 and/or panel stock 10 across the lengths and widths thereof, the total amount, i.e., the total mass, of material AM1 used to form the distributed interconnecting structure 30 within the volume V18A, i.e., the amount of material used to form the distributed interconnecting structure 30 along the length H and across the width G of the volume V18A, should be the same, or substantially the same, as the total amount, i.e., the total mass, of material AM2 used to form the portion of the interconnecting structure 31 contained within the adjacent and contiguous volume VFJH, i.e., the amount of material used to form the number of interconnecting support walls 22 along the length H and across the width F of the volume VFJH, wherein VFJH=F×J×H. In the example illustrated in
Whereas the amount of material AM1 is to be distributed with greater density across the width G of the volume V18A than the amount of material AM2 is distributed across the width F of the volume VFJH in order to provide sufficient material in and along the lengths of the area or zone 18A, e.g., for supporting the structure and operation of a living hinge formed in this area or zone, it is further desirable to use the same amount of material AM1 in the volume V18A as the material AM2 used in the volume VFJH, and to distribute of this amount of material AM1 along the length H of the volume V18A substantially as the amount of material AM2 is distributed along the length H of the volume VFJH to thereby promote uniform cooling or curing of the panels 12 and/or panel stock 10 along the height H of the panels 12 (i.e., along the machine direction E). In the example illustrated in
As just described above, the distributed interconnecting structure 30 is illustratively designed relative to the volume V18A of the panel stock 10 and panels 12 within which it is formed such that the material making up the distributed interconnecting structure 30 is illustratively distributed across the width G of the volume V18A with greater density than is the material making up the portion of the interconnecting structure 31 defined by the number of interconnecting walls 22 spanning the width of an adjacent, contiguous and equal volume VFJH of the panel 12. This is illustratively the case not only with respect to the volume VFJH of the panel 12 to the left of the volume V18A but also with respect to an identical adjacent, contiguous and equal volume VFJH of the panel 12 to the right of the volume VFJH. As used herein, the term “density” is defined as a degree of consistency measured by the quantity of mass and/or surface area per unit volume. In the example illustrated in
In the example living hinge formation process of
In the simplified diagram illustrated in
It will be appreciated, as evident from
It will be understood that the description of the distributed interconnecting structure 30 with respect to
Referring again to
In embodiments in which it is desirable to have the panels 12 and/or panel stock 10 cool or cure to create relatively uniform surfaces along their lengths and widths, the amount of material used to form the distributed support structure 35 within the volume of the panel defined by the panel end area or zone 16 is illustratively selected to be the same, or approximately the same, as the amount of material used to form the number of interconnecting support members 22 within adjacent and contiguous volumes of the panel 12 on either side of the panel end area or zone 16 as described above with respect to the distributed interconnecting structure 30 formed within the volume V18A.
Referring now to
Referring now to
The interconnecting structure 31 has been illustrated and described hereinabove in the form of a plurality of elongated, spaced-apart members 22 affixed to and extending substantially perpendicularly between the opposed interior surfaces of the panel foils 20A, 20B. It will be understood that such members 22 represent only one non-limiting example embodiment of the interconnecting structure 31, and that this disclosure contemplates myriad other forms of the interconnecting structure 31 that may be formed within any one or more of the panel zones 19A-19G. As one example,
In another example,
In yet another example,
In still another example,
It will be understood that the various interconnecting structures 31′-31IV illustrated
The various distributed interconnecting structures 30, 30′, 30″ and 35, 35′, 35″ within the living hinge zones 18A-18D and end zones 16A, 16B respectively have been illustrated and described hereinabove in the form of various ones and/or combinations of generally linear, elongated support members, e.g., 32, 36A, 36B, 80, 82, 90, 92, 94, 96. However, at least within the living hinge zones 18A-18C, the panel foils 20A, 20B are compressed toward each other during the living hinge formation process, e.g., as illustrated by example in
Referring to
In any case,
In some embodiments, it is desirable to minimize, or at least reduce, the number and/or size of voids formed between adjacent elongated members as they collapse during the living hinge formation process. In such embodiments in which the distributed interconnecting structure 30′″ is provided in the form of a plurality of arcuate-shaped elongated members 140 as illustrated in
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
In still a further embodiment illustrated in
In yet a further embodiment illustrated in
In still a further embodiment illustrated in
It will be understood that, while not shown detail in
Referring now to
In the example illustrated in
The dimensions of the panel 12 illustratively represent one dimensional configuration used to produce one common closed-container sleeve widely used in the U.S., and the dimensions of the panel 12′ illustratively represent another dimensional configuration used to produce another common closed-container sleeve widely used in Europe. By designing an extrusion tool to selectively expand and place the living hinge zones 18A, 18B and 18C relative to, for example, the left (or right) edge 10A′ (or 10B′) of the panel stock 10 such that living hinges 381, 382 and 383 can be formed within such zones for each panel 12, 12′, a common panel stock 10 may thus be used to provide both types of panels 12, 12′ using a single extrusion tool. In the illustrated embodiment, the width (along the cross-machine direction) of the living hinge zone 18A need not be expanded since 130 millimeters (distance A) is substantially close to 5 inches. However, the difference between the distances B of the two the panels 12 and 12′ is approximately 2.8 inches and the width (along the cross-machine direction) of the living hinge zone 18B should thus be at least approximately 3.5 inches. The difference between the distance C of the two panels 12 and 12′ is approximately 0.75 inches, and the width (along the cross-machine direction) of the living hinge zone 18C should thus be at least approximately 4.5 inches. As the total length of the panel 12 is approximately 93 inches and the total length of the panel 12′ is only approximately 2, 200 millimeters, the width of the end zone 16B should be at least approximately 6.5-7 inches to account for the loss of a portion of the width of the panel 12′.
As illustrated in
Referring now to
In the illustrated embodiment, the panel product 300 may illustratively include edge areas 302A, 302B and 304 that may be particularly weak or otherwise exhibit insufficient deformation to compression forces applied to the outer surfaces of the foils 20A, 20B if the panel 12 includes, for example, only the interconnecting structures 31 of the type described used in the panel zones 19A-19D as described with respect to
In the illustrated embodiment, the panel product 300 may further include an internal area 306 that is particularly susceptible to compressive forces and/or is subject to substantial and/or repeated compressive forces. The panel stock 10 may accordingly be formed to include a zone 184 which contains one of the embodiments 30, 30′, 30″, etc. of the distributed interconnecting structure illustrated and described herein. Inclusion of such a distributed interconnecting structure within the zone 184 illustratively enhances deformation resistance of the area 306 to compression forces applied to the outer surface of the foil 20A and/or the foil 20B in such an area 306 of the panel product 300. Referring now to
In embodiments in which the secondary foil 20C is formed on the exterior surface of the top foil 20A and/or the secondary foil 20D is formed on the exterior surface of the bottom foil 20B, such formation may illustratively be accomplished, in one embodiment, using a conventional co-extrusion process. Those skilled in the art will recognize other techniques for forming the secondary foil 20C on the exterior surface of the top foil 20A and/or forming the secondary foil 20D on the exterior surface of the bottom foil 20B, and it will be understood that any such other techniques are contemplated by this disclosure. In embodiments in which the secondary foil 20C is attached to the exterior surface of the top foil 20A and/or the secondary foil 20D is attached to the exterior surface of the bottom foil 20B, such attachment may illustratively be accomplished via a conventional foil attachment structure(s), medium (media) or technique(s), examples of which include, but are not limited to, one or more adhesives or other foil bonding media, a conventional thermal bonding technique, or the like. Those skilled in the art will recognize other foil attachment structure(s), medium (media) or technique(s) for attaching the secondary foil 20C to the exterior surface of the top foil 20A and/or attaching the secondary foil 20D to the exterior surface of the bottom foil 20B, and it will be understood that any such other foil attachment structure(s), medium (media) or technique(s) are contemplated by this disclosure.
It will be understood that any combination of the embodiments 30, 30′, 30″, etc. of the distributed interconnection structures may be formed in any one or more of the living hinge areas or zones 18A-18C of any panel 12 described herein, and that any combination of the embodiments 35, 35″, 35″ of the distributed interconnection structures may be formed in either or both of the panel end areas or zones 16A, 16B of any panel 12 described herein. It will further be understood that any embodiment 30, 30′, 30″, etc. of the distributed interconnection structures may be alternatively or additionally used in whole or in part as a distributed interconnection structure in either or both of the panel end areas or zones 16A, 16B of any panel, and/or that any embodiment 35, 35′, 35″ of the distributed interconnection structures may be alternatively or additionally used in whole or in part as a distributed interconnection structure in any of the living hinge areas or zones 18A-18D.
The various embodiments of the interconnecting structures, e.g., 31, 31′, 31″, 31′″, 31IV, have been described herein as being provided in the form of a plurality of elongated support members, e.g., 22, 100, 110, 120, 122, 130, affixed to the interior surfaces of the planar foils 20A, 20B within one or more of the panel zones, e.g., 19A-19D. It will be understood that while such interconnecting structures in the form of a plurality of such elongated support members are indeed affixed to the interior surfaces of both planar foils 20A, 20B within any one panel zone, one or more of the individual elongated support members within such a plurality may be affixed to the interior surface of only one or the other of the planar foils 20A, 20B. For example, one or more of the elongated support members 22, 100, 110, 120, 122, 130 illustrated in the attached figures may, in alternate embodiments, include a gap between opposing ends thereof, or may not otherwise extend fully from the interior surface of one of the planar foils 20A, 20B to the other. As another example, one or more of the elongated support members 120 in the embodiment illustrated in
Similarly, the various distributed interconnecting structures, e.g., 30, . . . 30XII and 35, 35′, 35″ have been described herein as being affixed to the interior surfaces of the planar foils 20A, 20B. In some of the various embodiments of such distributed interconnecting structures provided in the form of a plurality of elongated support members, e.g., 32, 80, 82, 90, 92, 94, 96, 140, 150, 154, 160, 170, 180, 182, 100, 110, 120, 122, 130, the plurality of such elongated support members have also been described herein as being affixed to the interior surfaces of the planar foils 20A, 20B within one or more of the zones 18A-18E. It will be understood that while such distributed interconnecting structures are indeed affixed to the interior surfaces of both planar foils 20A, 20B within any one such zone, and such distributed interconnecting structures provided in the form of a plurality of elongated support members are likewise affixed to the interior surfaces of both planar foils 20A, 20B within any one such zone, one or more of the individual elongated support members within any such distributed interconnecting structure or plurality of elongated support members may be affixed to the interior surface of only one or the other of the planar foils 20A, 20B. For example, one or more of the elongated support members 32, 82, 96, 140, 150, 154, 160,270 180, 182 illustrated in the attached figures may, in alternate embodiments, include a gap between opposing ends thereof, or may not otherwise extend fully from the interior surface of one of the planar foils 20A, 20B to the other. Likewise, one or more of the elongated support members 202, 206, 210, 214, 216, 218 may be affixed only to the interior surface of the planar foil 20A, to the interior surface of the planar foil 20B, to one surface of the intermediate foil 200 or to the opposite surface of the intermediate foil 200. Thus, while it is true that the plurality of elongated support members within any of the panel zones, e.g., 19A-19D, the distributed interconnecting structure within any of the various zones 16A, 16B and/or 18A-18E and/or 181-184, and the plurality of elongated support members within any of the various zones 16A, 16B and/or 18A-18E and/or 181-184, are generally affixed within such zones to the interior surfaces of both of the planar foils 20A, 20B, one or more of the individual elongated support members within any such distributed interconnecting structure or plurality of elongated support members may be affixed to the interior surface of only one or the other of the planar foils 20A, 20B.
It will be further understood that the various embodiments of the distributed interconnecting structures illustrated in
While the invention has been illustrated and described in detail in the foregoing drawings and description, the same is to be considered as illustrative and not restrictive in character, it being understood that only illustrative embodiments thereof have been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected. For example, some embodiments have been described herein with which it is desirable to promote uniform cooling or curing of the panels 12 and/or panel stock 10 across the lengths and widths thereof by forming the distributed interconnecting structure 30 in the volume, V18A, of the living hinge area or zone 18A with the same, or substantially the same, amount of material along the length H of the zone 18A and across the width G of the zone 18A as used to form the portion of the interconnecting structure 31 along the lengths and across the widths in and of adjacent, contiguous panel zones 19A-19D having the same volume as V18A. This disclosure further contemplates alternate embodiments in which the interconnecting structures between the planar foils 20A, 20B are not necessarily uniform across the panel length and/or width, but in which such interconnecting structures may be concentrated and/or compressed, and in some embodiments solid, in and along, for example, one or more of the zones in which a living hinge is to be formed. In such embodiments, for example, any warping, curling and/or other such undesirable resulting effects on the panel stock 10 and/or of the individual panels 12 that may occur in the area(s) of such one or more living hinge zones during cooling and/or curing thereof may be overcome, i.e., straightened and/or otherwise corrected, by heat and/or compression applied in such areas via a living hinge formation tool, die or press such as that described herein and/or via one or more other processing techniques that will occur to those skilled in the art.
Claims
1. An opposing-foil panel, comprising:
- first and second planar foils each defining a foil height extending linearly along a machine direction between first and second foil ends, a foil width extending linearly along a cross-machine direction, normal to the machine direction, between first and second foil sides and an interior surface between the first and second foil ends and the first and second foil sides, the interior surface the first planar foil spaced apart from the interior surface of the second planar foil,
- a first zone between the first and second planar foils, the first zone defining a first zone length extending along the machine direction and coextensive with the foil height and a first zone width parallel to and extending in the cross-machine direction across a first portion of the foil width,
- a first plurality of elongated support members affixed to the interior surfaces of the first and second planar foils in the first zone, the first plurality of elongated support members extending along the first zone length in the machine direction and spaced apart along the first zone width in the cross-machine direction,
- a second zone between the first and second planar foils adjacent to the first zone, the second zone defining a second zone length extending along the machine direction and coextensive with the foil height and a second zone width parallel to and extending in the cross-machine direction across a second portion of the foil width, and
- a distributed interconnecting structure affixed to the interior surfaces of the first and second planar foils in the second zone and extending along the second zone length in the machine direction, the distributed interconnecting structure including a plurality of support members distributed across the second zone width with greater density than the first plurality of elongated support members is distributed across the first zone width.
2. The opposing-foil panel of claim 1, wherein the plurality of support members comprises a second plurality of elongated support members each affixed to the interior surface of at least one of the first and second planar foils in the second zone, the second plurality of elongated support members extending along the second zone length in the machine direction and spaced apart along the second zone width in the cross-machine direction.
3. The opposing-foil panel of claim 2, wherein the first plurality of elongated support members defines a first distance along the first width of the first zone between each adjacent one of the first plurality of elongated support members,
- and wherein the second plurality of elongated support members defines a second distance along the second width of the second zone between each adjacent one of the second plurality of elongated support members,
- and wherein the first distance is greater than the second distance.
4. The opposing-foil panel of claim 2, wherein the distributed interconnecting structure further comprises a first plurality of lateral support members affixed to and between adjacent ones of the second plurality of elongated support members and spaced apart from the interior surfaces of the first and second foils, each of the first plurality of lateral support members extending between adjacent ones of the first plurality of lateral support members in the cross-machine direction and extending along the second zone length in the machine direction.
5. The opposing-foil panel of claim 4, wherein the distributed interconnecting structure further comprises a second plurality of lateral support members affixed to and between the adjacent ones of the second plurality of elongated support members and spaced apart from the interior surfaces of the first and second foils and from the first plurality of lateral support members, each of the second plurality of lateral support members extending between the adjacent ones of the first plurality of lateral support members in the cross-machine direction and extending along the second zone length in the machine direction.
6. The opposing-foil panel of claim 2, wherein the second plurality of elongated support members comprises at least one of a plurality of linear or arcuate-shaped ribs.
7. The opposing-foil panel of claim 2, wherein at least one of the second plurality of elongated support members extends diagonally from the interior surface of at least one of the first and second planar foils along the cross-machine direction.
8. The opposing-foil panel of claim 2, wherein at least one of the second plurality of elongated support members defines a cylindrical or oval cross-section in the cross-machine direction.
9. The opposing-foil panel of claim 2, further comprising an intermediate planar foil disposed between the first and second planar foils, the intermediate planar foil defining a height extending linearly along the machine direction between the first and second foil ends of the first and second planar foils, a width extending linearly along the cross-machine direction between the first and second foil sides of the first and second planar foils, a first planar surface facing the interior surface of the first planar foil and a second planar surface, opposite the first planar surface, facing the interior surface of the second planar foil,
- wherein a first subset of the second plurality of elongated support members is affixed to and between the interior surface of the first planar foil and the first planar surface of the intermediate planar foil in the second zone, and a second subset of the second plurality of elongated support members is affixed to at least one of the interior surface of the second planar foil and the second planar surface of the intermediate planar foil in the second zone.
10. The opposing-foil panel of claim 1, wherein the second zone comprises a living hinge zone,
- and wherein the opposing-foil panel further comprises a living hinge formed along the length of the living hinge zone with the first and second planar foils and at least a portion of the distributed interconnecting structure.
11. The opposing-foil panel of claim 1, wherein the second zone comprises an end zone positioned between the first zone and the first or second sides of the first and second planar foils.
12. The opposing-foil panel of claim 1, wherein the second zone defines a zone of the panel in which the distributed interconnecting structure provides enhanced deformation resistance, as compared with the first zone, to compressive forces applied to an external surface of at least one of the first and second planar foils.
13. The opposing-foil panel of claim 1, wherein the first zone defines a first volume between the interior surfaces of the first and second planar foils, the first zone length and a portion of first zone width adjacent to the second zone, and the second zone defines a second volume between the interior surfaces of the first and second planar foils, the second zone length and the second zone width,
- and wherein the first plurality of elongated support members disposed within the first volume defines a first mass of material, and the distributed interconnecting structure disposed within the second volume defines a second mass of material,
- and wherein the first volume is approximately equal to the second volume and the first mass of material is approximately equal to the second mass of material.
14. The opposing-foil panel of claim 13, further comprising:
- a third zone defined between the first and second planar foils, the third zone defining a third zone length extending along the machine direction and coextensive with the foil height and a third zone width parallel to and extending in the cross-machine direction across a third portion of the foil width, the third zone adjacent to the second zone with the second zone disposed between and contiguous with each of the first and third zones, and
- a third plurality of elongated support members affixed to and between the interior surfaces of the first and second planar foils in the third zone, the third plurality of elongated support members extending along the third zone length in the machine direction and spaced apart along the third zone width in the cross-machine direction,
- wherein the third zone defines a third volume between the interior surfaces of the first and second planar foils, the third zone length and a portion of the third zone width adjacent to the second zone,
- and wherein the third plurality of elongated support members disposed within the third volume defines a third mass of material,
- and wherein the third volume is approximately equal to each of the first and second volumes and the third mass of material is approximately equal to each of the first and second masses of material.
15. The opposing-foil panel of claim 1, wherein the first planar foil, the second planar foil, the first plurality of elongated support members and the distributed interconnecting structure are all of unitary construction.
16. The opposing-foil panel of claim 1, further comprising a lateral hinge extending in the cross-machine direction between the first and second foil ends along at least a portion of the first zone, the lateral hinge having a first end extending from the at least a portion of the first zone into the second zone and a second end opposite the first end,
- wherein the opposing-foil panel is separated along a first path extending in the machine direction through the second zone from the first foil end to the first end of the lateral hinge,
- and wherein the opposing-foil panel is separated along a second path extending in the machine direction from the first foil end to the second end of the lateral hinge to define a pivoting panel between the lateral hinge and the first and second paths.
17. The opposing-foil panel of claim 16, further comprising:
- a third zone between the first and second planar foils adjacent to a second side of the at least a portion of the first zone opposite the first side, the third zone defining a third zone length extending along the machine direction and coextensive with the foil height and a third zone width parallel to and extending in the cross-machine direction across a third portion of the foil width, and
- a second distributed interconnecting structure affixed to the interior surfaces of the first and second planar foils in the third zone and extending along the third zone length in the machine direction, the second distributed interconnecting structure including a plurality of support members distributed across the third zone width with greater density than the first plurality of elongated support members is distributed across the first zone width,
- wherein the second path extends in the machine direction through the third zone from the first foil end to the second end of the lateral hinge.
18. An opposing-foil panel, comprising:
- first and second planar foils each defining a foil height extending linearly along a machine direction between first and second foil ends, a foil width extending linearly along a cross-machine direction, normal to the machine direction, between first and second foil sides and an interior surface between the first and second foil ends and the first and second foil sides, the interior surface the first planar foil spaced apart from the interior surface of the second planar foil,
- a plurality of panel zones between the first and second planar foils each defining a panel zone length extending along the machine direction and coextensive with the foil height and a panel zone width parallel to and extending in the cross-machine direction across a different portion of the foil width, each of the plurality of panel zones including therein multiple elongated support members affixed to the interior surfaces of the first and second planar foils with each of the multiple elongated support members extending along the panel zone length of the corresponding panel zone in the machine direction and spaced apart along the panel zone width of the corresponding panel zone in the cross-machine direction,
- a plurality of living hinge zones defined between the first and second planar foils and spaced apart along the foil width, each of the plurality of living hinge zones defining a living hinge zone length extending along the machine direction and coextensive with the foil height and a living hinge zone width parallel to and extending in the cross-machine direction across a different portion of the foil width between and adjacent to different ones of the plurality of panel zones, each of the plurality of living hinge zones including therein a distributed interconnecting structure affixed to the interior surfaces of the first and second planar foils and extending along the corresponding living hinge zone length in the machine direction and distributed across the corresponding zone width with greater density than the multiple elongated support members are distributed across the panel widths of each of the plurality of panel zones, and
- a plurality of living hinges each formed along the length of a different one of the plurality of living hinge zones with the first and second planar foils and at least a portion of the corresponding distributed interconnecting structure.
19. An opposing-foil panel for a collapsible container sleeve, comprising:
- a first planar foil having a foil height extending and a foil width,
- a second planar foil also having the foil height and the foil width and spaced apart from the first planar foil, the foil height defining a machine direction parallel therewith and the foil width defining a cross-machine direction parallel therewith, the cross-machine direction normal to the machine direction, the foil width terminating at each of first and second opposite sides of the first and second planar foils to define respective first and second panel sides,
- a first panel zone defined between the first and second planar foils and having a length extending across the foil height and a width extending along a first portion of the foil width,
- a first plurality of elongated support members affixed to the opposed interior surfaces of the first and second planar panel members in the first panel zone, each of the first plurality of elongated support members extending across the length of the first panel zone and spaced apart along the width of the first panel zone,
- a panel end zone defined between the first and second planar foils and having a length extending across the foil length and a width extending along a second portion of the foil width with one side thereof adjacent to the first panel zone and an opposite side thereof terminating at the first panel side, and
- a distributed interconnecting structure affixed to the opposed interior surfaces of the first and second planar foils along the length of the panel end zone and distributed across the width of the panel end zone with greater density than the first plurality of elongated support members is distributed across the width of the first panel zone, the first panel side being joinable with one of the second panel side and a panel side of another panel to form the collapsible container sleeve.
20. The opposing-foil panel of claim 19, further comprising a plurality of spaced apart living hinges each extending along the panel in the machine direction.
Type: Application
Filed: Sep 15, 2016
Publication Date: Mar 16, 2017
Inventor: Judson A. Bradford (Holland, MI)
Application Number: 15/265,986