Information
-
Patent Grant
-
6394340
-
Patent Number
6,394,340
-
Date Filed
Friday, October 6, 200024 years ago
-
Date Issued
Tuesday, May 28, 200222 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
-
CPC
-
US Classifications
Field of Search
US
- 229 232
- 229 214
- 229 226
- 229 217
- 229 228
- 229 229
- 229 207
- 229 209
-
International Classifications
-
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.
US Referenced Citations (25)