Package with easy-opening cover portion

Information

  • Patent Grant
  • 6394340
  • Patent Number
    6,394,340
  • Date Filed
    Friday, October 6, 2000
    23 years ago
  • Date Issued
    Tuesday, May 28, 2002
    22 years ago
Abstract
An easy-opening, liquid-tight package has an interior space for storage. The package includes a front wall, a rear wall opposing the front wall, a pair of opposing side walls, a bottom wall and a top wall opposing the bottom wall. A seal wall is contiguous with the top wall and extends from a juncture of the top wall and the seal wall. The seal wall has an edge that is opposite the juncture. The seal wall is sealed to the front wall at an exterior surface of the front wall. At least one line of weakness is formed in the top wall, extending from the seal wall at the edge into the top wall. The line of weakness defines a cover portion of the top wall. The cover portion is formed from a portion of the seal wall and a portion of the top wall. When the top wall and seal wall are separated along the line of weakness, the cover portion is separable from the package to define an open area for accessing the interior storage space of the package. A blank for the package is also disclosed.
Description




FIELD OF THE INVENTION




The present invention relates to a package having an easy-open feature for providing a wide access area into the package. More specifically, the present invention relates to an easily opened, wide access area package formed from standard gable top and brick-type packages.




BACKGROUND OF THE INVENTION




Gable top and brick-type packages have become widely accepted by consumers, packagers and the like, for packaging liquid foods, such as, milk and juice. To a much lesser extent, these packages are in use for packaging particulate-containing liquid foods and solid foods. However, due to the nature and arrangement of these packages, vis-a-vis the container opening or spout, their use has been limited with respect to solid foods. This is particularly true for packages that are configured for use as a serving plate, such as a bowl.




Numerous types of packaging have been developed for use as serving plates, such as bowls. One type of package is formed as a styrofoam or like bowl into which a solid food product (e.g., dry cereal) is filled. The bowl is then sealed across its top rim with, for example, a polymeric film-like liner material by well-known methods. The seal is then pealed away and milk can be added directly to the cereal which is then eaten from the serving bowl. Although this is an effective method for packaging and use, it is an inefficient use of space in distribution and shipping as well as for retailing shelf space considerations. Moreover, often, these materials cannot be used for directly heating the packaged goods, such as soups, that could otherwise be heated in a microwave oven.




Another type of package includes a rectangular cardboard box into which dry food, such as a cereal, may be stored within a high density polyethylene (HDPE), wax or like bag. This type of arrangement cannot be used for serving in that milk cannot be directly poured into the cereal. Rather, the cereal must be removed from the package and bag and placed into a conventional serving bowl. Again, these materials cannot be used for directly heating the packaged goods.




Known gable top or brick-type packages are also not suitable for this purpose. Many gable top packages now include a plastic spout or like pouring fitment. Alternately, as was known prior to these fitments (and in less costly packaging), these packages were opened by separating or opening the gable panels of the package. The gable panels are formed on a relatively small area or surface (portion) of the carton. Thus, typically, these cartons are deep and narrow which does not lend itself well for use as a serving bowl. Likewise, brick-type packages often include a closure or other opening means on a small surface of the package. Again, this does not lend itself well for use as a serving-type package.




Accordingly, there is a need for a package that can be used as a serving type of package for solid and particulate-containing foods. Desirably, such a package permits the addition of a liquid into the solid foods for serving directly therefrom. Most desirably, such a package has an enlarged opening area relative to the depth of the package. Most desirably, such a package is liquid impermeable and can be placed into a microwave oven in order to heat the contents therein.




SUMMARY OF THE INVENTION




An easy-opening liquid-tight package defines an interior storage space. The package includes a front wall, a rear wall opposing the front wall, a pair of opposing side walls, a bottom wall and a top wall opposing the bottom wall. A seal wall is contiguous with the top wall and extends from a juncture of the top wall and the seal wall. The seal wall has an edge that is opposite the juncture. The seal wall is sealed to the front wall at an exterior surface of the front wall.




At least one, and preferably two lines of weakness are formed in the top wall. The lines of weakness can be formed as perforations that extend from the seal wall at the edge into the top wall, to define a cover portion. The cover portion is formed from a portion of the seal wall and a portion of the top wall. When the top wall and seal wall are separated along the line of weakness, the cover portion is separable, at least in part, from the package to define an open area for accessing the interior storage space of the package.




A package in accordance with the present invention permits the addition of a liquid into the solid foods for serving directly therefrom. Such a package has an enlarged opening area relative to the depth of the package. Preferably, such a package is formed from liquid impermeable materials. The package can be formed from materials that permit microwave heating the package with the contents therein.




In one embodiment, the package is formed from a laminate material having a paperboard core having a thickness. The material is liquid-tight, having an inner coating layer and an outer coating layer. The perforations are formed into the laminate material. The perforations can penetrate the outer coating layer. Alternately, the perforations can penetrate the outer layer and at least a portion of, if not the entire the thickness of the paperboard core. In this manner, separation occurs, at least in part, within the paperboard core. This is carried out by forming the perforations through none of, a portion less than the entire thickness, or the entire thickness of the paperboard core.




The cover can hingedly attach to the package by discontinuation (e.g., separation) of the line of perforation. Alternately, the perforation lines connect to one another for removal of the entirety of the cover from the package.




The perforation lines can be substantially linear and parallel to one another. Alternately, they can diverge from the front of the package rearward. In such an arrangement, the cover portion can extend essentially the entire width of the package.




In either the hinged arrangement or the complete removal arrangement, the perforation lines can extend in an arcuate manner from the edge of the seal wall into the top wall toward the rear wall. In this manner, the opening can be formed resembling the rim of a bowl.




The ratio of the surface area of the cover to the overall surface area of the package can be greater than 0.5 to provide for a large access area into the package.




The package can include a tab panel extending from and contiguous with the seal wall edge to facilitate opening the package. The tab has a length that is less that the length of the seal wall. The tab is affixed to the front wall of the package at a lesser strength than the walls are sealed to one another to facilitate separating the tab from the front wall.




A perforation line can also be formed in the front wall, beneath the location at which the seal wall is sealed to the front wall. This influences tearing of the material within the core at the front wall, to facilitate opening the package.




The package can also include a dispensing opening panel disposed below the cover. The dispensing opening panel includes an opening therein for dispensing the contents from the package.




A blank for the liquid-tight package is formed from a laminated material having a paperboard core having a thickness, a coating layer on a first side of the paperboard and a coating layer on a second side of the paperboard core. The blank includes a front wall panel, a bottom wall panel contiguous with the front wall panel and separated therefrom by a first crease line, a rear wall panel contiguous with the bottom wall panel and separated therefrom by a second crease line, a top wall panel contiguous with the rear wall panel and separated therefrom by a third crease line, a seal wall panel contiguous with the top wall panel and separated therefrom by a fourth crease line and a pair of side wall panel sets.




Each of the side wall panel sets extends from and is contiguous with opposing sides of the front, bottom, rear, top and seal walls. Each of the pair of side wall panel sets is separated from their respective front, bottom, rear, top and seal walls by fifth and sixth crease lines, respectively.




At least one line of weakness is formed in the seal wall panel and the top wall panel. Preferably, two lines of weakness are formed in the blank as lines of perforations. The lines of perforations extend inwardly from an edge of the seal wall panel, across the fourth crease.




The lines of perforations can be formed substantially linear and parallel to one another. Alternately, the lines of perforations can connect. Alternately, still the lines of perforations can be formed having an arcuate path to, for example, resemble the outline of the rim of a bowl.




The lines of perforations can extend substantially to the third crease, in which case the third crease serves as a hinge.




The lines of perforations can be formed into the laminate material penetrating one of the coating layers only, one of the coating layers and at least a portion of the thickness of the paperboard core, or one of the coating layers and the entire thickness of the paperboard core, without penetrating the other of the coating layers. The lines can be formed by mechanical contact, such as by a blade or the like. Alternately, the lines of perforation can be “cut” by a laser. The lines can be formed as a series of discrete cuts into the material, or as one or more continuous lines.




These and other features and advantages of the present invention will be apparent from the following detailed description, the accompanying drawings, and the appended claims.











BRIEF DESCRIPTION OF THE FIGURES





FIG. 1

is a front perspective view of one embodiment of a package with an easy-opening cover portion in accordance with the principles of the present invention;





FIG. 1A

is a rear perspective view of the carton of

FIG. 1

;





FIG. 2

is a view of the package of

FIG. 1

with the cover portion opened and hinged rearwardly for access into the storage region of the package;





FIG. 3

is a plan view of a blank for forming the package of

FIG. 1

;





FIG. 4

is a cross-sectional view of one exemplary laminate material for forming the package taken along line


4





4


of

FIG. 3

;





FIG. 4A

is cross-sectional view of the material taken along line


4


A—


4


A of

FIG. 1

, illustrating the tab portion as it is being urged from the front wall, and the separation of the material within the core;





FIG. 5

is an alternate embodiment of the easy-open package having an oval cover portion, this embodiment being formed from a conventional gable top carton;





FIG. 6

is still another alternate embodiment of the easy-open package, this embodiment also being formed from a conventional gable top carton;





FIG. 7

is still another embodiment of the easy-open package, this embodiment being formed from a parallelepiped type package, such as a TETRA BRIK® brand package;





FIG. 8

is still another embodiment of the easy-open package, this embodiment being formed from flat-top type package;





FIG. 9

is yet another embodiment of the easy-open package, this embodiment being formed from a modified gable top carton; and





FIG. 10

is a view of the package of

FIG. 9

illustrated with the cover portion opened and with an optional dispensing panel positioned on an inside surface of the package.











DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS




While the present invention is susceptible of embodiment in various forms, there is shown in the drawings and will hereinafter be described presently preferred embodiments with the understanding that the present disclosure is to be considered an exemplification of the invention and is not intended to limit the invention to the specific embodiments illustrated.




Referring now to the figures and in particular to

FIGS. 1 and 2

, there is shown one embodiment of an easy-open package


10


, configured as a bowl, embodying the principles of the present invention. The bowl-type package


10


is intended for storing a product, such as cold cereal, and is further intended for use as a bowl, by opening the package


10


, and adding, i.e., pouring milk into the package


10


.




The package permits the addition of a liquid into the solid foods for serving directly therefrom. Such a package has an enlarged opening area relative to the depth of the package. Preferably, such a package is formed from liquid impermeable materials. The package can be formed from materials that permit microwave heating the package with the contents therein, for, for example, soup.




The package


10


illustrated in

FIGS. 1 and 2

includes front and rear walls,


12


,


14


, side walls,


16


,


18


, a bottom wall


20


and a top wall


22


. The walls


12


-


22


are formed from panels as a carton blank. A seal wall


24


(which will be described in more detail below) is formed extending from the top wall


22


for sealing to the front wall


12


of the package


10


.




The package


10


can be formed from various types of materials. However, in a current embodiment, as seen in

FIG. 4

, the package


10


is formed from a coated paperboard material


26


having a substrate or core


28


that has inner and outer sealing layers


30


,


32


, such as low density polyethylene (LDPE) and is formed in a laminate structure. The paperboard material


26


, with each wall


12


-


24


folded and sealed to adjacent respective walls, forms a liquid-tight package


10


. Further, an inner barrier layer (not shown) can be formed as part of the laminate, disposed adjacent the inner layer


30


of the package


10


. One exemplary structure is disclosed in Löfgren et al., U.S. Pat. No. 5,133,999, commonly assigned with the present application and incorporated herein by reference. Those skilled in the art will recognize that other materials and configurations can be used for the present package to achieve liquid-impermeable characteristics, as well as the ability to heat the package within, for example, a microwave oven. All such materials and configurations are within the scope and spirit of the present invention.




Advantageously, as will be recognized from a study of the figures, the side walls


16


,


18


have a “multiple panel” thickness. That is, these walls


16


,


18


are formed from a plurality of panels (as is discussed below), and thus provide an increased thickness or number of layers for thermal insulation. This enhances the ability to “handle” the package


10


when it is used, for example, as a soup bowl containing hot soup.




The package


10


is formed having at least one line of weakness


34


formed in the material


26


, for opening the package


10


. In the embodiment illustrated in FIGS.


1


and


2


, two lines of weakness


34


are formed as perforations along the package top wall


22


. These perforations


34


define a cover


36


, which in turn defines an opening area, indicate at


38


, for the package


10


. That is, the perforations


34


permit opening or separating the package material


26


therealong to form the cover or lid


36


for the package


10


.




As illustrated in

FIGS. 1 and 4

, the perforations


34


extend along the seal wall


24


to permit readily separating that portion of the seal wall


24


that extends between the perforations and is contiguous with the cover portion


36


, from those portions of the top wall that remain sealed to the front wall, as indicated at


40


.




To facilitate separating the seal wall


24


from the front wall


12


, the perforations


34


can be formed through the outer sealing layer


32


only, through the outer sealing layer


32


and partially into the paperboard core


28


, or through the outer sealing layer


32


and entirely through the core


28


, without penetrating the inner sealing layer


30


. Perforations


35


can also be formed in the front wall


12


structure in the same manner. To this end, as seen in

FIG. 4A

, when the seal wall


24


is urged outwardly to open package


10


, the front wall


12


structure can separate within the core


28


, rather than at the interface, as indicated at


42


, of the front wall


12


and the seal wall


24


. This facilitates readily opening the package


10


by tearing within the core as indicated at


44


relative to the seal wall


24


and/or, as indicated


45


relative to the front wall


12


, rather than separating the walls


12


,


24


at the interface


42


.




It has been observed that because of the strength of the inner sealing layer


30


to outer sealing layer


32


bond (when these layers are bonded to one another during package erection as by heat sealing), it is easier to tear the core


28


. This makes for an easier opening package


10


, in contrast to attempting to separate the walls


12


,


24


from one another where they are sealed or bonded together.




As is seen in

FIGS. 1 and 2

the perforations


34


can be formed in straight lines extending along the top wall


22


and seal wall


24


of the package


10


, from the front to the rear of the package


10


. The crease


46


at the top wall/rear wall juncture provides a hinge for the cover portion


36


. Alternately, as shown in

FIG. 5

, the perforations


134


can be formed in an arcuate manner to resemble the outline of a bowl when the package


110


is opened. Alternately again, as illustrated on the package


210


in

FIG. 6

, the line of weakness or perforations


234


can be formed as a continuous line so that the cover


236


can be fully removed from the package


210


rather than hinged rearwardly. Alternately, though not shown, the perforations


236


can extend over the top wall/rear wall


222


/


214


juncture, as indicated at


246


, a short distance down the rear wall


214


to provide an even greater open area.




The lines of weakness, e.g., perforations


34


,


35


,


134


,


234


,


334


, can be formed in a variety of ways and can have a variety of configurations. The perforations can be mechanically formed, such as by deep embossing or cutting into the material


26


. Alternately, the perforations can be cut by, for example, a laser cutting tool. Such tools can, as will be recognized by those skilled in the art, be controlled, vis-à-vis energy emitted, to precisely control the depth of the cut. It is contemplated that the cut depth be determined and provided to facilitate readily opening the package along the perforation lines.




To this end, the cut depth can be through the outer sealing layer


32


only, through the outer sealing layer


32


and into a portion of the thickness t of the core


28


. Alternately, the cut depth of the perforations can be though the entire thickness t of the core


28


. Still alternately, the cut depth can be through the core


28


and can contact, but not penetrate the inner sealing layer


30


, so as to stress that layer to influence tearing at the stressed location. All such perforation types, depths and methods are within the scope and spirit of the present invention.




In addition, the lines of weakness, e.g., perforations


34


,


35


,


134


,


234


,


334


, can be formed as a series of discrete cut sections (e.g., having a dashed line appearance). Alternately, the perforations can be formed as a single continuous or contiguous formation (as by continuous laser cutting or contact by a wheel or knife having a smooth cutting edge). All such perforation types and methods are within the scope and spirit of the present invention.




The type, depth and method of forming the lines of weakness, e.g., the perforations


34


,


35


,


134


,


234


,


334


, must take into consideration the rigors of packaging and distribution of the filled package


10


, while achieving the goal of providing a package


10


that opens at the desired location, e.g., along the perforations


34


,


35


,


134


,


234


,


334


.




Referring now to

FIG. 3

, the package


10


is formed from a blank


50


configuration similar to, but slightly modified from, a gable top carton of the same proportions. The blank


50


includes first, second, third, fourth and fifth panels


52


,


54


,


56


,


58


and


60


, respectively, which correspond to the front


12


, rear


14


, bottom


20


, top


22


and seal


24


walls. A tab panel


62


can be formed contiguous with and adjacent the fifth panel


60


, which tab panel


62


extends from the fifth panel


60


between the cover perforations


34


where the perforations


34


extend to the edge


64


of the fifth panel


62


. The tab


62


is shorter than the fifth panel


60


. The panels


52


-


60


are separated from one another by first, second, third and fourth crease or score lines


70


,


72


,


74


,


76


, respectively.




The blank


50


includes a pair of respective side panel sets,


66


,


68


, that correspond to the bottom and top panels of a standard gable top carton. Each set of side panel sets


66


,


68


is separated from its respective front, rear, top and bottom panels by a horizontal score or crease line


78


,


80


. It is to be noted that the term horizontal used with respect to this and the following crease or score line is used in that the orientation of the blank in the enclosed

FIG. 3

is shown in that manner. In use, the score lines or crease lines would lie vertically when the blank is laid out in the usable configuration of the carton.




The panels of side panel set


68


are configured having an otherwise gable top configuration. That is, panels


68




a-d


each include top fin panels


68




e-h


extending from an edge thereof The top fin panels


68




e-h


are sealed to one another in forming the conventional carton and the gable G is then folded over onto itself to configure the package


10


in the rectangular block-type configuration illustrated in

FIGS. 1-2

and


5


-


6


.




The panels


66




a-d


of side panel set


66


are configured in a like manner to the bottom panels of a conventional gable top carton. Panels


66




a,c


are infolded, which, in turn, urges panels


66




b,d


inwardly. A seal is made across panel


66




a


to form the sealed side wall


16


of the package


10


.




In erecting the present package


10


, unlike known gable top configurations, the fifth panel


60


is sealed to an outer surface


82


of the first panel


52


. That is, it is common for gable top and other type packages to have the fifth panel sealed to an interior surface of the first panel so that it is not visible when the package is erected. In the present package


10


configuration, however, the fifth panel


60


is sealed to the exterior surface


82


of the first panel


52


so that it is fully visible when the package


10


is erected. Upon sealing the fifth panel


60


to the exterior surface


82


of the first panel


52


, the tubular form of the blank is made.




The package


10


is erected in accordance with methods and apparatus that will be recognized by those skilled in the art. In a contemplated form, fill and seal process, the package


10


is formed, filled and sealed in a manner similar to standard gable top cartons. That is, panels


66




a-d


of side panel set


66


are folded and sealed to form the side wall


16


. As provided above, this side wall


16


corresponds to the bottom wall of a conventional gable top carton. This side wall


16


is also oriented downwardly (as is a bottom wall) during the remainder of the filling and sealing operations of the machine.




After the side wall


16


is formed (i.e., panels


66




a-d


sealed), the package


10


is filled and the other side wall


18


(corresponding to a gable top gable portion) is formed and sealed. Panels


68




a-d


are infolded and top fin panels


68




e-h


are sealed to one another by methods and apparatus that will be recognized by those skilled in the art. After the package


10


is formed having the tradition gable-formed top, the gable G is then folded down onto itself and sealed to one of the gable panels to form the rectangular, brick-like package


10


.




As set forth above, the fifth panel


60


can be formed having the tab panel


62


extending therefrom. The tab


62


is set apart from the fifth panel


60


and, unlike the fifth panel


60


, is not necessarily (liquid-tight) sealed onto the front wall


12


(e.g., first panel


52


). Rather, the tab


62


may be adhered to the front wall


12


by one or more relatively weak, readily broken seals, indicated at


84


, formed by, for example, heat sealing or a hot melt adhesive. This maintains the tab panel


62


adjacent the front wall. Essentially, the tab


62


is intended to be adhered to the front wall


12


only so that it remains “flat,” lying on the front wall


12


, but is readily urged or separated from the wall


12


, without being strongly adhered thereto. In this manner, the tab


62


is readily dislodged from (i.e., pulled from) the front wall


12


to facilitate opening the package


10


. The tab


62


can be shorter than (i.e., have a lesser length than) the fifth panel


60


.




To open the package


10


it is merely necessary to dislodge the tab panel


62


and urge it upwardly so that the front wall


12


“tears” along the perforations


35


. Continued urging separates the cover portion


36


from the top wall


22


. As set forth above, the perforations


35


can be formed partially into the paperboard core


28


so that separation (at the seal wall


24


) occurs within the core


28


rather than at the outer/inner layer sealed juncture or interface


42


of the front wall/seal wall


12


/


24


.




Optionally, as illustrated in

FIG. 3

, the blank


50


can include a cut-out


86


formed in the first panel


52


. The cut-out


86


further facilitates separating the seal wall


24


from the front wall


12


when opening the package


10


. The cut-out


86


can also be configured for resealing the package


10


, by insertion of the tab


62


behind the front wall


12


at the cut-out


86


. Of course, the blank


50


can be formed without the cut-out


86


in the first panel


52


.




Another alternate embodiment of the package


310


is illustrated in FIG.


7


. In this embodiment, the basic structure of the package


310


as well as the perforations


334


and forming thereof into the material are the same as that shown in the embodiments of

FIGS. 1-2

and


5


-


6


. In this embodiment, however, the basic package


310


shape and configuration is that of the well-recognized parallelepiped container such as a TETRA BRIK® brand container.




In such a configuration, the perforations


334


can be formed parallel to one another (not shown), or they can be formed at angles to one another along the top wall


322


. In this manner, the cover


336


separates from the top wall


322


along lines that diverge from the seal wall


324


so that the cover portion


336


can be formed to extend essentially the entire width of the package


310


. Optionally (as best seen in FIG.


10


), a panel can be disposed below the cover


336


, which panel has an opening (shown as shadowed at


388


in

FIG. 7

) formed therein. This opening


388


can be formed having a relatively large area for dispensing larger solid product, such as, for example, corn flakes, bran flakes and the like, or for particulate-containing product, such as soup.





FIG. 8

illustrates yet another embodiment in which a flat top container


410


has a cover


436


arrangement similar to that shown in the embodiment illustrated in FIG.


7


. Again, an optional panel can be disposed under the cover panel


436


having an opening


488


therein for dispensing contents.




Still another embodiment of the package


510


is shown in

FIGS. 9 and 10

. In this embodiment, the package


510


is formed from a modified gable top carton. The cover panel


536


is formed on a top or gable panel


590


of the container that would otherwise be configured to have the standard gable arrangement. Again, an optional panel


596


having a dispensing opening


588


can be disposed under the cover


536


to facilitate dispensing contents from the package


510


.




In the present disclosure, the words “a” or “an” are to be taken to include both the singular and the plural. Conversely, any reference to plural items shall, where appropriate, include the singular.




From the foregoing it will be observed that numerous modifications and variations can be effectuated without departing from the true spirit and scope of the novel concepts of the present invention. It is to be understood that no limitation with respect to the specific embodiments illustrated is intended or should be inferred. The disclosure is intended to cover by the appended claims all such modifications as fall within the scope of the claims.



Claims
  • 1. A liquid-tight package defining an interior storage space comprising:a front wall; a rear wall opposing the front wall; a pair of opposing side walls; a bottom wall; a top wall opposing the bottom wall; a seal wall contiguous with the top wall and extending from a juncture of the top wall and the seal wall, the seal wall having an edge thereof opposite the juncture, the seal wall being sealed to the front wall at an exterior surface of the front wall; the opposing side walls being formed from a plurality of side wall panels, the side wall panels being contiguous with and connected to adjacent, respective panels defining the front wall, the rear wall, the bottom wall, the top wall and the seal wall, the side wall panels further being contiguous with and connected to adjacent side wall panels; and at least one line of weakness formed in the top wall, the line of weakness extending from the seal wall at the edge into the top wall and defining a cover portion, the cover portion being formed from a portion of the seal wall and a portion of the top wall, wherein when the top wall and seal wall are separated along the line of weakness, the cover portion is separable from the package, at least in part, to define an open area for accessing the interior storage space of the package, the front wall defining a cut-out portion disposed such that the seal wall overlies the entirety of the cut-out portion when the package is constructed.
  • 2. The liquid-tight package in accordance with claim 1 wherein the package is formed from a laminate material having a paperboard core having a thickness, an inner coating layer and an outer coating layer, and wherein the at least one line of weakness is formed as a line of perforation into the laminate material penetrating the outer coating layer and at least a portion of the thickness of the paperboard core.
  • 3. The liquid-tight package in accordance with claim 2 wherein the line of perforation is formed as a series of discrete cut sections into the laminate material.
  • 4. The liquid-tight package in accordance with claim 2 wherein the line of perforation is formed as a substantially continuous cut section in the laminate material.
  • 5. The liquid-tight package in accordance with claim 1 wherein the at least one line of weakness extends through less than the thickness of the paperboard core.
  • 6. The liquid-tight package in accordance with claim 1 wherein the at least one line of weakness extends through the thickness of the paperboard core.
  • 7. The liquid-tight package in accordance with claim 1 wherein the package includes two lines of weakness, each extending from the seal wall edge to a juncture of the top wall and the rear wall.
  • 8. The liquid-tight package in accordance with claim 7 wherein the lines of weakness are substantially linear and parallel to one another.
  • 9. The liquid-tight package in accordance with claim 7 wherein a juncture of the cover and the rear wall define a hinge region for hingedly opening the cover.
  • 10. The liquid-tight package in accordance with claim 1 including a further line of weakness disposed, at least in part, beneath the seal wall where the seal wall is sealed to the front wall, wherein the line of weakness lies adjacent the cut-out portion.
  • 11. The liquid-tight package in accordance with claim 1 wherein the top wall has a surface area and the cover has a surface area, and wherein the ratio of the cover surface area to the top wall surface area is greater than 0.5.
  • 12. The liquid-tight package in accordance with claim 1 including a tab panel extending from and contiguous with the seal wall, the seal wall having a length that is greater than a length of the tab panel.
  • 13. The liquid-tight package in accordance with claim 1 including a further line of weakness disposed, at least in part, beneath the seal wall where the seal wall is sealed to the front wall.
  • 14. A blank for a liquid-tight package, the blank formed from a laminate material having a paperboard core having a thickness, a coating layer on a first side of the paperboard and a coating layer on a second side of the paperboard core, the blank comprising:a front wall panel; a bottom wall panel contiguous with the front wall panel and separated therefrom by a first crease line; a rear wall panel contiguous with the bottom wall panel and separated therefrom by a second crease line; a top wall panel contiguous with the rear wall panel and separated therefrom by a third crease line; a seal wall panel contiguous with the top wall panel and separated therefrom by a fourth crease line; a pair of side wall panel sets, each of the sets extending from and contiguous with opposing sides of the front, bottom, rear, top and seal walls, each of the pair of side wall panel sets being separated from their respective front, bottom, rear, top and seal walls by fifth and sixth crease lines, respectively, each of the side wall panel sets being formed from a plurality of side wall panels, the side wall panels being contiguous with and connected to adjacent side wall panels within its respective set; and at least one line of weakness formed in the seal wall panel and the top wall panel, extending inwardly from an edge of the seal wall panel, the at least one line of weakness extending across the fourth crease, wherein the front wall defines a cut-out portion disposed such that the seal wall overlies the entirety of the cut-out portion when the package is constructed.
  • 15. The blank in accordance with claim 14 including two lines of weakness, each extending inwardly from the edge of the seal wall panel across the fourth crease.
  • 16. The blank in accordance with claim 15 wherein the two lines of weakness are substantially linear and parallel to one another.
  • 17. The blank in accordance with claim 15 wherein the two lines of weakness extend substantially to the third crease.
  • 18. The blank in accordance with claim 14 wherein the at least one line of weakness is a line of perforation into the laminate material penetrating one of the coating layers and at least a portion of the thickness of the paperboard core.
  • 19. The blank in accordance with claim 14 wherein the at least one line of weakness is a line of perforation into the laminate material penetrating through the thickness of the paperboard core.
  • 20. The blank in accordance with claim 14 including a tab panel extending from and contiguous with the seal wall panel.
  • 21. The blank in accordance with claim 20 wherein the seal wall panel has a length and the tab panel has a length that is less than the length of the seal wall panel.
  • 22. The blank in accordance with claim 14 including a further line of weakness formed in the front wall panel extending inwardly from about an edge thereof, the further line of weakness having a length less than a length of the seal wall panel.
  • 23. The blank in accordance with claim 14 including a further line of weakness disposed, at least in part, between the cut-out portion and the fourth crease line.
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