This invention is directed to strap-reinforced compressed packaging, including paperboard packaging with separation of wares in the packaging, and the integration of the container in the package. Separation spacers, a tensioned strap, and portions of the package wrapper form a tightly-held load-bearing structural unit suited to multi-layer palletizing, the rigors of transportation, storage and shelf display purposes, with significant economic and ecological benefits.
Paperboard packaging is extensively used for the transportation and display of goods. Current packaging practice does not follow structural engineering principles of integrating all the elements of a package contents with those of the packaging, per se. Thus the available intrinsic strengths of the containers forming the package contents are not fully utilized with that of the package elements per se to provide a robust integrated load-bearing package unit.
This failure to optimize package strength is then reflected in potential failure of individual packages in a multi-tiered palletized or transported load, with consequent damage to the integrity of the whole pallet load, under the stresses resulting from the static and dynamic forces of transportation.
Current packaging practice relies in large measure on the structural strength and rigidity of the exterior carton per se for pallet load stability, thus requiring a cardboard box structure of undue strength and rigidity, with correspondingly high paperboard and glue content. The profligate use of materials to construct such large and thick packaging for multi-layer palletizing, transportation and storage is a little-recognized but important factor that contributes to the generation of greenhouse gases and global warming, and to the denuding of forests.
The current modes of packaging frequently permit relative movement and fretting between adjacent containers within a package, which translates, under transportation conditions, into goods and/or containers damaged from mutual impact with containers within the package. Such internal movement of containers within a package can include sliding, pivoting and tilting, and can result in skewing of containers within the package, which renders the package unstable, thus destroying the stability and integrity of the pallet load, with a consequent cascade of further damage to adjoining packages and their contents.
The prior use of strapping has been generally ineffective, and raises problems of pallet-load-bearing stability, having been used primarily in a bundling role, with a failure to recognize the strap's potential contribution in an integrated load bearing structural component. Earlier theoretical packaging work resulted in undependable packages in the load-bearing sense with un-predicted failures. These shortcomings have been and are particularly disadvantageous in the supply/distribution service, where the primary focus is on palletized handling and transportation of packages of wares. Consequently, commercial application of any similar horizontal tensioned strapped package constructs in the supply chain has not been previously achieved.
Strapped packages having rows and/or columns of three or more containers, upon the application of the forces of transportation, face an additional problem. Unless the containers are prevented from lateral movement, horizontally applied outside forces cause the containers in one column or row to shift, or “nest” relative to the containers in adjacent rows or columns. This shifting causes the containers to become loose in the strapped package, and to possibly rotate or skew in the package, such that the package and containers lose their ability to withstand the application of vertical, horizontal or other transportation forces resulting from the dynamic forces applied to the package during transportation, such as impact forces, shear forces and rotary forces.
The present invention in an embodiment provides a transportation suitable package assembly of significantly reduced packaging material content, based upon the principle of combining the structure and load bearing capability of the goods containers in the package with the structure of the package per se, using inelastic tensioned binding members, such as inelastic straps, to compress the package and its contents of goods containers into an integrated, stable, structural load-bearing unit.
It will be understood that to meet the needs of industry, packages are required to be suited for loading onto pallets, and also to be able to withstand the rigors of long term rugged transportation and potential mishandling. In this context, more than simple vertical load-bearing capability is required, as transverse dynamic (i.e. skewing or pivoting) loading during transportation may be an inescapable reality, so that resistance to skewing loads may be an essential characteristic of the subject packages, which are referred to as “substantially rigid,” to encompass the requisite anti-skewing and anti-pivoting capability.
Separation between individual containers within the package of the present invention is provided by the provision of spacer media, where each spacer media is compressed between adjacent containers by the tensioned binding inelastic strap member, or members, against the walls of the containers in the package, creating a frictional linking element to prevent skewing of the containers in the package, and further integrating the package and its contents into a stable unitary structural load-bearing, substantially rigid unit that can be arranged in layers upon pallets.
Such pallet loads may consist of a single, uniform product, or may consist of mixed, multi-product pallets, for convenient shipping and distribution in the supply chain.
The use of reduced areas of packaging materials, and of discontinuous package surfaces is particularly helpful in affording improved package ventilation, in the changing of packaged product temperature, by heating or by cooling, with concomitant savings in plant and operating costs.
Further advantages of the present system are: the provision of packaging providing pallet loads of enhanced stability; improved capability for palletizing with a mixture of goods packages; faster shelf transfer due to reduced de-packaging requirements; reduction in material return shipment or discard; facilitated package breakdown due to reduced joints and use of low-tension glue, with improved return handling and transportation; and enhanced re-use of packaging.
The rising costs of packaging, in both materials and labor costs for packaging production and for the handling of packaged goods, together with the adverse impact upon the environment from extreme levels of corrugate production presently required, all combine to make commercial application of the present invention both feasible and highly desirable.
Thus, there is provided a package construct having an outer wall structure; a plurality of containers in tightly packed relation, substantially filling at least the lower portion of the outer wall structure; spacers or spacer walls between a portion of each container and adjacent containers, and inelastic tensioned strapping means wrapped about the wall structure compressing the wall structures, the plurality of containers and the spacers together to provide a substantially rigid unitary structural unit well-suited for stacking in self-supporting, multi-layers, including palletization for shipping. A package of the present invention, which may contain rigid or semi-rigid containers having a load bearing capability, and combinations thereof, can be handled as a structural unit, in the manner of a traditional rigid box.
In most instances, the individual containers within a package are substantially identical. Flaps and spacers between containers, or between portions of containers, can provide a protective cushion between the contents of the package, such spacers serving also to cushion and protect adjacent containers. The tensioned strap compresses the spacers against the containers, or portions of containers, to create a frictional holding force between adjacent containers, which force aids in preventing lateral movement of the containers when transportation forces are applied.
The spacers stabilize and integrate the strength of the containers with the package. The use of interposed spacers between the containers also limits or prevents mutual working, fretting and frictional movement between the goods containers during prolonged and rugged shipping and handling.
The claimed package also serves favorably for display purposes as individual package constructs by the simple expedient, in many instances, of removing the strapping from the package. The present packages also lend themselves to pallet, multiple construct displays. The pallet displays include a single, pallet-size container incorporating the principles and physical attributes of the present invention, to provide a belted, rigid construction.
The surfaces of the paperboard packaging material can lend themselves to printed advertising, and for purposes of pallet-contents, determination in warehouses and storerooms.
The subject package system is readily used with a wide range of products, including cans, bottles, jars, and other containers both rigid and semi-rigid.
The simplified packaging of the present invention protects the package contents against damage due to impact with adjoining package units and/or the application of external forces incurred in transporting the packages, and stabilizes the containers in the package against mutual slipping, sliding, skewing and impact. The packaging in combination with the goods containers themselves form structural, load bearing units, which can function in a support role to overlying layers of packages in multi-tier pallet loads.
The use of a binding member such as an inelastic tensioned strap or straps serves to trap, compress and immobilize the intervening spacer members and the containers in the package, in a compressed relation with adjacent product container surfaces. This stabilized contact induces high frictional forces between the compressed surfaces, such that the spacer members are effectively anchored at both ends, so as to serve as effective bracing struts between the package wall or divider and the product container per se. These high frictional forces also oppose skewing or pivoting tendencies of the container under load forces.
In a subject package containing a number of such stabilized product containers, the package, combined with the containers, becomes a structural unit with enhanced stability and load bearing and load sharing capability. In many instances, such as semi-rigid and rigid products per se, the product and the package paperboard serve as rigid components, compressed together and integrated by the classic lateral compressive forces of the tensioned strapping into a substantially rigid, load-bearing package unit capable of withstanding transportation forces.
In an embodiment of the present invention, the positioning of a strap or straps can be defined by the location of strap recess cut-outs in the side wall portions of the wrapper assembly, which recess cut-outs may also form associated spacers by which the strap compresses the spacer into engagement with a portion of the adjoining goods container.
The subject package construct achieves corners of strength and integrity that provide the idealized “sweet-zones” localized surfaces that are highly resistant to deformation and buckling under compressive lateral strapping loads.
Using substantially inelastic tensioned straps in the present packaging embodiments facilitates both manual and machine deconstruction/reconstruction of the subject package. The characteristics of compressively binding the same package components with the inelastic tensioned straps by hand or by machine assures maintenance of the requisite compressive forces and sustains package integrity to be maintained in the manner of a traditional rigid box undergoing transportation forces.
The paperboard typically used in carrying out the present invention is corrugated paperboard, wherein the inherent stiffness and compressive strength of the paperboard in the direction in line with or parallel to the corrugations is utilized where feasible to enhance the strength and rigidity of the ultimate pack. Such corrugate also has the property of laying flat when unpackaged, for facilitated return and re-use, or recycling. Alternatively, other materials such as molded or fabricated members such as trays or support sheets may be used functionally to also serve the purposes normally envisioned for paperboard.
The tensioned securing strap/straps of the present combination package may utilize a variety of strap features to optimize the use of these packages, both in packing and unpacking, or in repackaging. Such inelastic straps are selected from a wide range, including self-adherent straps, pealable straps, friction-welded straps, strapping with interlocking tabbed ends that are separable by transverse sliding disengagement, and knotted strapping having a pull-release free end.
The spacer used in the package is made of materials selected from the group consisting of paper, corrugated paperboard, plastic sheet stock, labels and sleeves, expanded and non-expanded carpet, rubber, fabric, pre-form egg-carton style material, plastic ring carriers, semi-structural and structural wood, cellulose and oil-based products, fiber products and interposed secondary product. The spacer can be an independent sheet or sheets inserted between the containers, which independent sheets may coincide with the container height. The independent sheets can also be less than the container height. The independent sheets are integrated with the package by compression applied by the tensioned strap and need not contact the paperboard base and paperboard walls. The spacer can also be an adhesive bond between containers. The spacer can also be part of the paperboard, such as a D-cut, protrusion, and alternatively, a flap sandwiched between containers. These D-cuts, protrusions, and flaps can extend from the bottom or from the sides of the package and from other spacers. The spacers ultimately become locked in place by the compressive force of the binding tensioned strap member.
In an embodiment that is not shown, the containers are held against movement by use of an adhesive between the bottom of each container and the lower portions of the outer wall structure. In this embodiment, each container is in abutment with all adjacent containers, and the tensioned strap that extends around the outer wall structure compresses the wall structure and containers together, whereby the adhesive acts as a “virtual” spacer preventing relative movement between the containers and the outer wall structure.
A further, major advantage of the subject packaging system is the facilitation of product handling from pallet to shelf, wherein the removal of the strap or straps then enables the package to be used as a magazine, where contents can be slid on to the shelf or the assembly can be directly placed on the shelf, in a readily viewable and hand-accessible condition, without further unpackaging, for significant manpower reduction. This obviates the current practice of carton slashing with a box cutter. The use of high-tensile, low shear adhesive connected between surfaces of the board package can provide additional integration and stability to the package, while facilitating recycling by enabling the ready reduction of glued corner pieces to their original planar (blank) form.
Environmentally, packaging in accordance with the present invention leads to significant and measurable reduction in the mass of cardboard required per unit of goods shipped, and the elimination of one ton of cardboard production has been equated to a one ton reduction of carbon dioxide emissions, so that significant ecological benefits clearly accrue from the present invention.
The present invention comprises a unitary load-bearing package formed from a cardboard or paperboard product having a base portion and side portions extending vertically around the outside of the containers or around a portion of the outside of the containers. A plurality of containers having rigid or semi-rigid side walls are located in each compartment in an embodiment of the invention, and are supported by the base portion.
At least one tensioned inelastic strap extends horizontally around the container-filled package and is in contact with at least one of the containers through a plurality of recesses in the package side walls in which the strap or straps reside. The tensioned inelastic strap applies a tight compressive force to the outer side walls of the package, the container walls, and the spacers to form a unitary load-bearing transportation package, where the walls of the containers in the package, as well as the strap, the spacers and the outer side walls of the package combine to resist the load forces on the package generated under rigorous shipping conditions.
The cruciform-shaped spacer 26 for use in a package in accordance with the present invention may consist of two rectangles of corrugated board, each having a mid-width slot extending parallel with the flutes of the board for half the length of each board. One board is reversed and turned at right angles to the other, and the slots slide over each other, to interdigitate the boards, and establish the load-bearing cruciform.
Alternatively, two unslotted boards 26 may be formed at right angles along their midline, and glued back-to-back to form the cruciform section, again with the flutes of the corrugations extending vertically to the height of the cruciform. The cruciform spacer 26 height may be selected to coincide with the top of the package 10, so as to form a strong, load bearing prop, in supporting relation with a superimposed stack of packages.
The four laterally extending arms of the cruciform spacer 26 are of sufficient lateral extent to be sandwiched between centrally located adjacent containers 20, serving to separate and frictionally cushion the containers. The vertical orientation of the corrugated flutes enables the cruciform 26 arms to readily conform to both the initial and the compressed ‘strapped’ location of the respective containers, and to exert high friction/tensile stabilization forces on the containers 20, when the package is strapped.
The high frictional forces thus developed by the cruciform spacer 26 under the persistent compression force of the tensioned strap/straps 18 also serve to mutually stabilize the containers 20 along a vertical axis to counter any skewing or pivoting tendencies of the container engendered from loads applied externally to the package, such as experienced during transportation. The package 10 has a bottom portion 28 to support the containers 20 and spacers 22, 24 and 26. Under the compressive forces provided by the strap or straps 18, the spacers 22, 24, 26 are compressed between adjacent containers 20 into high-friction integrating contact, thereby integrating the package into a unitary, load-bearing structural unit with all elements of the package 10 remaining immobile relative to each other upon the application of transportation forces.
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The D-cuts 38 have their base lines 40 located and oriented to be tangential to the bottom of containers 34, such that, when bent upwardly normal to the plane of bottom sheet 36, the laterally inclined, upwardly projecting portion 42 of the D-cut 38 has an angled, ‘wrapping’ component of its length to provide an extended contact area with the surfaces of adjoining adjacent containers 34. The D-cuts 38 now serve as spacers to separate the containers 34 from each other. The portion of each D-cut 38 adjacent the base line 40 abuts and locates the base of the adjoining container 34.
A tensioned inelastic strap or band 44 compresses the side walls 32 of the package 30, and across corner flaps 46 contacts a portion of the containers 34 and compresses the containers 34 into tightly abutted, mutually bracing relation. The respective D-cuts 38 that are in compressed relation with the sides of the containers 34 create a series of high frictional links between the respective individual containers 34, the D-cuts 38 and adjacent containers, while securing the bottoms of containers 34 to package bottom sheet 36.
The tensioned strap 44 holds the corner flaps 46 in place. The tensioned strap 44 compresses the side walls 32 of the package 30, at least a portion of the surface of ‘corner’ goods containers 34, and the D-cut spacers 38, thereby locking the entire compressed assembly of containers 34 and D-cuts 38 in highly frictionally unitary integrated relation with the side walls 32 and bottom sheet 36 of package 30, so as to form a structural, load bearing package 30.
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Specific embodiments of structural tensioned strapped multi-pack packaging has been described for the purpose of illustrating the manner in which the invention is made and used. It should be understood that the implementation of other variations and modifications of the invention and its various aspects will be apparent to one skilled in the art, and that the invention is not limited by the specific embodiments described. Therefore, it is contemplated to cover the present invention and any and all modifications, variations, or equivalents that fall within the true spirit and scope of the basic underlying principles disclosed and claimed herein.
This application is a continuation-in-part of U.S. patent application Ser. No. 11/594,187, filed Nov. 8, 2006 which is a continuation-in-part of U.S. patent application Ser. No. 11/082,984, filed Mar. 18, 2005.
Number | Date | Country | |
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Parent | 11594187 | Nov 2006 | US |
Child | 13679474 | US | |
Parent | 11082984 | Mar 2005 | US |
Child | 11594187 | US |