The present disclosure relates in general to packaging for products, and more particularly to structures for packaging, such as wrappers for stackable media (e.g., reams of paper). The disclosure is especially concerned with structures for wrapping packages that include a line of weakness configured to facilitate opening of the package without necessitating the user of a tear strip or pull tab to initiate tearing of the wrapper.
Stackable media, such as reams of paper, are often packaged in discrete bundles using a wrapper, such as a laminate sheet that is sealed to create the package. The arrangement of the package contents in such cases is often important for facilitating a consumer's use of the contents. In the case of a ream of paper, for example, maintaining the paper in a stacked orientation is important for allowing the user to feed the paper into a machine for end use, such as into a copier or printer.
At the same time, OEMs, converters, and manufacturers aim to produce products in a simple, cost-efficient way while meeting consumer needs.
Embodiments of the invention described herein therefore provide improved structures for creating packages, such as wrappers for packaging reams of paper, that include a line of weakness that is configured to facilitate the initiation and controlled propagation of a tear in the wrapper to allow the package to be opened without the use of a separate opening feature or mechanism, such as a tear strip or pull tab. Because the line of weakness is built-into the structures (e.g., not an add-on feature), the structures can be produced and used for packaging in a more simple and cost effective manner. At the same time, the configuration of the line of weakness allows the package to be opened while substantially preserving the arrangement and orientation of the package contents, such that the contents can be more easily accessed and used.
Accordingly, in some embodiments, a media wrapper for wrapping a stack of print media is provided. The media wrapper comprises a structure configured to be wrapped and sealed around a stack of print media to form a wrapped package. The structure has a front edge, a rear edge, a left edge, and a right edge. Upon wrapping the structure around the stack of print media, the structure is configured to form two pairs of longitudinal fold lines, two pairs of transverse fold lines, and two pairs of lateral fold lines defining a left side, a right side, a front side, a rear side, a top side, and a bottom side of the wrapped package. Moreover, one of the left or right edges of the structure is configured to overlap the other to form a girth seal on the bottom side of the wrapped package.
The front and rear edges of the structure are each configured to be folded into an envelope fold so as to form the front and rear sides of the wrapped package, each envelope fold being defined by fold lines arranged to form a pair of side flaps, a bottom flap overlapping the side flaps, and a top flap overlapping and sealed to the bottom flap. In addition, the structure includes a line of weakness configured to facilitate opening of the media wrapper. The line of weakness comprises a first line of weakness portion that extends along a fold line of the envelope fold forming a respective one of the front or rear sides of the wrapped package, a second line of weakness portion that extends substantially perpendicularly to the respective longitudinal fold lines, and a connecting line of weakness portion that extends between the first line of weakness portion and the second line of weakness portion and is disposed at a non-zero angle with respect to each.
In some embodiments, the non-zero angle of the connecting line of weakness portion may be selected such that a tear initiated along the first line of weakness portion is directed towards the second line of weakness portion and propagates along substantially an entire length of the second line of weakness portion. Additionally or alternatively, the second line of weakness portion may circumscribe the wrapped package. A distance between a proximal end of the first line of weakness portion and the second line of weakness portion may be greater than a distance between the proximal end of the first line of weakness portion and the front edge of the structure. In some cases, a depth of the line of weakness is greater along at least part of the first line of weakness portion or the connecting line of weakness portion as compared to the second line of weakness portion.
The structure may be a laminate structure and may comprise two layers of material. A first layer of the two layers may comprise oriented polypropylene (OPP) and a second layer of the two layers may comprise polyethylene terephthalate (PET).
In some cases, the first line of weakness portion may at least partially define one of the side flaps of the wrapped package. Moreover, the line of weakness may be laser scored. The structure may further include a printed indicia proximate the first line of weakness portion indicating a location for a user to initiate a tear to open the media wrapper.
In other embodiments, a media wrapper for wrapping a stack of print media is provided, the media wrapper comprising a structure configured to be wrapped and sealed around a stack of print media. In an unwrapped configuration, the structure has a front edge, a rear edge, a left edge, and a right edge. The structure includes a line of weakness configured to facilitate opening of the media wrapper. In the unwrapped configuration the line of weakness comprises a first line of weakness portion that extends away from the front edge of the structure to a point disposed from the front edge of the structure, a second line of weakness portion that extends substantially parallel to the front edge of the structure and is spaced from the first line of weakness portion, and a connecting line of weakness portion extending between the first line of weakness portion and the second line of weakness portion at an a non-zero angle with respect to each of the first and second line of weakness portions. The line of weakness is configured such that, in the wrapped configuration, a tear initiated along the first line of weakness portion is directed towards the second line of weakness portion via the connecting line of weakness portion and propagates substantially an entire length of the second line of weakness portion to open a wrapped stack of print media.
In some cases, a depth of the line of weakness may be greater along at least part of the first line of weakness portion or the connecting line of weakness portion as compared to the second line of weakness portion. The second line of weakness portion may circumscribe the wrapped package. Additionally or alternatively, the structure may be a laminate structure and may comprise two layers of material.
In still other embodiments, a method of forming a media wrapper for wrapping a stack of print media is provided. The method comprises providing a structure having a front edge, a rear edge, a left edge, and a right edge; wrapping the structure around a stack of print media so as to define a left side, a right side, a front side, a rear side, a top side, and a bottom side of a wrapped package formed by two pairs of longitudinal fold lines, two pairs of transverse fold lines, and two pairs of lateral fold lines; and sealing one of the left or right edges of the structure in an overlapping configuration with respect to the other of the left or right edges of the structure to form a girth seal on the bottom side of the wrapped package. The method further comprises folding each of the front and rear edges of the structure into a respective envelope fold so as to form the front and rear sides of the wrapped package by creating fold lines arranged to form a pair of side flaps, a bottom flap overlapping the side flaps, and a top flap overlapping the bottom flap for each of the front and rear sides; sealing each top flap to the corresponding bottom flap; and creating a line of weakness in the structure.
The line of weakness comprises a first line of weakness portion that extends along a fold line of the envelope fold forming a respective one of the front or rear sides of the wrapped package, a second line of weakness portion that extends substantially perpendicularly to the respective longitudinal fold lines, and a connecting line of weakness portion that extends between the first line of weakness portion and the second line of weakness portion and is disposed at a non-zero angle with respect to each.
Providing the structure may comprise laminating a first layer of material to a second layer of material. Creating the line of weakness may comprise varying a depth of the line of weakness such that the depth is greater along at least part of the first line of weakness portion or the connecting line of weakness portion as compared to the second line of weakness portion. The first line of weakness portion may at least partially define one of the side flaps of the wrapped package. Creating the line of weakness may comprise laser scoring the line of weakness. Moreover, the method may comprise providing a printed indicia proximate the first line of weakness portion indicating a location for a user to initiate a tear to open the media wrapper.
Having thus described the disclosure in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
The present invention now will be described more fully hereinafter with reference to the accompanying drawings in which some but not all embodiments of the inventions are shown. Indeed, these inventions may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.
As noted above, stackable products, such as sheets of paper or other print media, for example, are typically packaged for distribution and sale in discrete quantities in a stacked arrangement. In the case of paper, for example, a quantity of paper (e.g., 500 sheets) may be packaged together by applying a wrapper to produce a wrapped ream of paper. The wrapper may be a sheet of material, such as a larger sheet of paper or a laminate structure formed of multiple plies of material, such as a polymer film laminate. The sheet forming the wrapper may be applied to the stacked products (e.g., the stacked quantity of paper) and sealed so as to enclose the products within the wrapper. As a result, a user of such conventionally wrapped products generally must manually break the seal (e.g., by tearing apart folded edges) or otherwise cut through the wrapper (e.g., such as by using a sharp edge or scissors) to gain access to the products contained therein. In the process of such labor intensive efforts to access the products, the arrangement of the products contained therein may be disturbed, such that the once generally vertical stack (of paper, for example) may, upon removal of the conventional wrapper, no longer be in a vertical orientation, but rather may be in a slanted or otherwise disheveled pile. In addition, if a sharp object is used to cut through the wrapper there is a risk of damaging the products held therein, such as by inadvertently cutting through one or more of the sheets of paper directly adjacent to the wrapper that is being cut, or (worse yet) causing bodily injury to the user due to mishandling of the sharp object used to cut through the wrapper.
In some cases, conventional wrappers may be modified in an effort to facilitate the opening of the packaged product, such as by providing tear strips or pull tabs to allow the wrapper to be removed more easily. In the case of a conventional tear strip, the tear strip, which may be a strip of material embedded or otherwise applied to the wrapper that, upon separation of the tear strip from the wrapper, results in a portion of the wrapper being removed or becoming separable from the remainder of the wrapper, thereby providing access to the contents therein. In the case of a conventional pull tab, which is applied and secured to the wrapper, a portion of the wrapper secured to the pull tab may be configured to be moved with the pull tab, such that separation of the pull tab by the user initiates a tearing of the wrapper as the attached portion of the wrapper is displaced with the pull tab. In each of these conventional cases, however, the incorporation of the tear strip or the pull tab to the wrapper is an additional step in the manufacturing process that must be undertaken by the converter or OEM, which adds cost to the process and often slows down the process of packaging and distributing the product.
Through applied ingenuity and hard work, the inventors have discovered that a media wrapper may be formed for wrapping a stack of products, such as print media, where the wrapper is made of a structure that includes a line of weakness configured (e.g., having a length, depth, shape, position, etc.) to allow a user to more easily initiate a tear in the wrapper, without the need for a separate feature such as a pull tab or tear strip. The line of weakness described herein are and further configured to propagate the tear in a controlled manner to create an opening in the wrapper, thereby allowing the user to access and withdraw the products held therein in a more reliable and efficient manner.
Turning to
With continued reference to the example depicted in
A structure 25 used to form the media wrapper 20 is shown in an unwrapped configuration (e.g., as a flat sheet) in
With continued reference to
Referring to
The line of weakness 30 may further comprise a second line of weakness portion 140 that extends substantially perpendicularly to the respective longitudinal fold lines 75, 76, 77, 78, shown in
The second line of weakness portion 140 may, in some cases, circumscribe the wrapped package 10, e.g., forming a continuous loop around the wrapped package, such that a tear propagated along the entire length of the second line of weakness portion 140 serves to separate the end portion 45 of the wrapper 20 from the remainder of the wrapper, creating an access opening 50 as shown in
With reference again to
The line of weakness 30 may have various configurations, and the first line of weakness portion 130, the second line of weakness portion 140, and the connecting line of weakness portion 150 may have different lengths, depths, orientations, and so on, with respect to each other and the structure 25. Referring to
In some embodiments, a user may be guided as to the appropriate location to grip the media wrapper 20 for most efficiently initiating the tear through the use of a printed indicia 160 included on the structure 25 proximate the first line of weakness portion 130 (shown in
Turning now to
In some embodiments, a depth of the line of weakness 30 may be greater along at least part of the first line of weakness portion 130 and/or the connecting line of weakness portion 150 as compared to the second line of weakness portion 140, such as to facilitate the initiation of a tear in the first line of weakness portion and/or the connecting line of weakness portion. For example, the first line of weakness portion 130 may be cut all the way through the first layer 170 and at least partially through the second layer 175, as shown, whereas the connecting line of weakness portion 150 may be cut only through the first layer 170 (e.g., either partially or all the way through the first layer). Similarly, the second line of weakness portion 140 may be cut to the same depth as the connecting line of weakness portion 150, as shown in the depicted embodiment. In this way, when the user grips the top flap 120 of the envelope fold and starts to pull (as shown in
Once the tear has been initiated in the desired location, however, continued application of a pulling force by the user may propagate the tear along the first line of weakness portion 130, into the connecting line of weakness portion 150, and into and along the second line of weakness portion 140, regardless of the shallower depth of the line of weakness 30 in the connecting line of weakness portion 150 and/or the second line of weakness portion 140. Rather, the shallower depth of cut over the respective portions of the line of weakness 30 can reduce the risk that the media wrapper 20 will inadvertently be opened or removed from the ream of paper (for example) or other product, such as during transportation, and makes it more likely that the wrapper will only be opened when a tear is initiated in the first line of weakness portion 130 and is propagated into the connecting line of weakness portion 150 and the second line of weakness portion 140 through the continued application of force by the user.
In other embodiments, a method of forming a media wrapper for wrapping a stack of print media is provided, where the method includes providing a structure having a front edge, a rear edge, a left edge, and a right edge, such as described above and depicted in
One of the left or right edges of the structure may be sealed in an overlapping configuration with respect to the other of the left or right edges of the structure to form a girth seal on the bottom side of the wrapped package, as shown in
In some embodiments, the line of weakness may be created by varying a depth of the line of weakness such that the depth is greater along at least part of the first line of weakness portion or the connecting line of weakness portion as compared to the second line of weakness portion, as described above with respect to
Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
This application is a continuation of U.S. patent application Ser. No. 16/268,931, filed Feb. 6, 2019, which is a divisional of U.S. patent application Ser. No. 14/812,448, filed Jul. 29, 2015, now issued as U.S. Pat. No. 10,239,677, each of which are incorporated by reference herein in their entireties.
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Number | Date | Country | |
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20210130065 A1 | May 2021 | US |
Number | Date | Country | |
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Parent | 14812448 | Jul 2015 | US |
Child | 16268931 | US |
Number | Date | Country | |
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Parent | 16268931 | Feb 2019 | US |
Child | 17145913 | US |