Patent Grant
11919691
The present disclosure relates to a thermoplastic flexible package that can be used to carry items.
Articles such as food, healthcare, personal care, office, home and garden supplies, etc. can be held within paper-based containers or paperboard cartons. The articles may be contained within a smaller package that may be contained in the paper-based containers or paperboard cartons. For example, some food items such as beverages can be contained in rigid or semi-rigid plastic bottles. Several of the bottles may be placed onto a paper-based or corrugated tray that is then shrink-wrapped with plastic film. In another example, beverages can be contained in cans. Several of the is cans may be placed into a paperboard carton.
The shrink-wrapped paper-based tray and the paperboard carton packaging formats allow for display on a store shelf and for transport of smaller items. However, there are drawbacks to each of these paper-based packaging formats. The shrink-wrapped paper-based tray may have distorted graphics due to uneven shrinkage of the shrink film around the tray where the package is unaesthetically pleasing and/or makes it difficult for the user to read information on the package. Further, the shrink-wrapped paper-based tray may be difficult fora user to carry as the edges of the shrink-wrapped film are not designed to accommodate user's hands or may tear while the user is carrying the package.
Drawbacks related to paperboard cartons include interrupted graphics due to misalignment of the various folds and edges of the carton that may also be unaesthetically pleasing and/or makes it difficult for the user to read information on the package. The paperboard cartons may also tear when being carried by a user. Further, paperboard cartons that contain beverage cans are commonly used in outdoor environments and/or in situations where ice is present to keep the beverages cold. The paperboard cartons do not withstand moisture well and can also tear unexpectedly and allows the cans to spill out of the carton when not intended.
There is a need for a flexible package that can be used to display items, can be used to carry items, especially without unintentional tearing, and that can withstand moist environments. The present application describes such a thermoplastic flexible package.
In an aspect, the thermoplastic flexible package includes a first non-shrinkable panel, an opposing second non-shrinkable panel, a first shrinkable panel and an opposing a second shrinkable panel. A panel seal connects each the first non-shrinkable panel to the first shrinkable panel, the first non-shrinkable panel to the second shrinkable panel, the second non-shrinkable panel to the first shrinkable panel and the second non-shrinkable panel to the second shrinkable panel. A first seal connects the first shrinkable panel and the second shrinkable panel. A second seal that is opposite the first seal connects the first and second non-shrinkable panels and the first and shrinkable panels. The first and second non-shrinkable panels and the first and shrinkable panels each include a first longitudinal edge that opposes a second longitudinal edge and each panel includes a first upper transverse edge that opposes a second lower transverse edge. The first non-shrinkable panel and the second non-shrinkable panel oppose each other such that the first upper transverse edges and the second lower transverse edges correspond with each other. The first shrinkable panel and the second shrinkable panel oppose each other such that the first upper transverse edges and the second lower transverse edges correspond with each other. The panel seals connect the longitudinal edges of the first and second non-shrinkable panels to the first and second shrinkable panels. The first non-shrinkable panel and the second non-shrinkable panel each forms a gusset. The package includes a second seal that includes the second lower edges of the first and second non-shrinkable panels and the first and second shrinkable panels.
Other features that may be used individually or in combination with respect to any aspect of the disclosure are as follows.
The thermoplastic flexible package may include a first handle perimeter in the first shrinkable panel positioned between the first seal and the first upper edge of the first shrinkable panel and a second handle perimeter in the second shrinkable panel that corresponds to the first handle perimeter.
The thermoplastic flexible package may include a first extension and a second extension that each extend longitudinally away from the first seal. The first extension includes a third handle perimeter and the second extension includes a fourth handle perimeter that corresponds to the third handle perimeter. The third handle perimeter and the fourth handle perimeter correspond to the first handle perimeter and the second handle perimeter when the first extension and the second extension are folded at the first seal toward either the first shrinkable panel or the second shrinkable panel.
The thermoplastic flexible package may include that the first extension and the second extension can be attached to either first shrinkable panel or the second shrinkable panel.
The thermoplastic flexible package may include that the first shrinkable panel and the second shrinkable panel include a free shrink value in the range of greater than 5 percent to 20 percent in each the machine direction and the cross direction of the shrinkable panels.
The thermoplastic flexible package may include that the first non-shrinkable panel and the second non-shrinkable panel include a free shrink value in the range of 0 percent to 5 percent in each the machine direction and the cross direction of the non-shrinkable panels.
The thermoplastic flexible package further includes an opening feature on at least one of the first or second non-shrinkable panels. The opening feature may include a first opening portion and a second opening portion.
The thermoplastic flexible package may include that the first non-shrinkable panel and the second non-shrinkable panel are each further sealed to the first shrinkable panel and the second shrinkable panel with a gusset seal. The gusset seal extends from the panel seal towards the first seal at an angle from the panel seal in the range of greater than 0 degrees to less than 90 degrees.
The thermoplastic flexible package may contain at least a beverage can that includes a can height and a can diameter.
The thermoplastic flexible package includes a width of each of the first non-shrinkable panel and the second non-shrinkable panel that includes the can height.
The thermoplastic flexible package includes an after-shrink width of each of the first shrinkable panel and the second shrinkable panel that includes the sum of the can diameters for each can that is placed next to each other in the transverse direction.
The thermoplastic flexible package includes a second seal that may be a pinch bottom seal or a pinch, fold-over and glue seal.
Other objects and advantages of the present disclosure will become more apparent to those skilled in the art in view of the following description and the accompanying figures.
The figures show some but not all embodiments. The figures are not necessarily to scale. Like numbers used in the figures refer to like components. It will be understood, however, that the use of a number to refer to a component in a given figure is not intended to limit the component in another figure labeled with the same number.
The present disclosure relates to a flexible package that is in the form of a bag 10 that can be used for storing and transporting a variety of items. The term “flexible”, as used herein, refers to materials which are capable of being flexed or bent, especially repeatedly, such that they are pliant and yieldable in response to externally applied forces. Flexible is substantially opposite in meaning to the terms inflexible, rigid or unyielding.
With reference to
The term “panel”, as used herein, refers to a single layer or multilayer film.
The term “layer”, as used herein, refers to a structure of a single polymer-type or a blend of polymers that may be accompanied by additives and that may be continuous or discontinuous. The layer may be a monolayer or may include sublayers that are subunits of a layer.
The term “film”, as used herein, refers to a continuous polymer web of any thickness.
The term “web”, as used herein, refers a thermoplastic substrate having one or more structural layers. A “web” may include one or more paper or non-woven structural layers.
The term “multilayer”, as used herein, refers to a plurality of layers in a single film generally in the shape of a web that can be made from a polymeric material or a non-polymeric material bonded together by any conventional means known in the art, such as, but not limited to coextrusion, extrusion coating, and lamination, vacuum vapor deposition coating, solvent coating, or suspension coating, or any suitable combination of one or more thereof.
The terms “polymer” or “polymeric”, as used herein, refer to a material that is the product of a polymerization reaction of natural, synthetic, or natural and synthetic ingredients, and is inclusive of homopolymers, copolymers, terpolymers, etc. In general, the layers of a film may comprise a single polymer, a mixture of a single polymer and non-polymeric materials, a combination of two or more polymeric materials blended together, or a mixture of a blend of two or more polymeric materials and non-polymeric materials.
The term “thermoplastic”, as used herein, refers to a polymer or polymer mixture that softens when exposed to heat and then returns to its original condition when cooled to room temperature. In general, thermoplastic materials may include natural or synthetic polymers. Thermoplastic materials may further include any polymer that is cross-linked by either radiation or chemical reaction during manufacturing or post-manufacturing processes.
The first non-shrinkable panel 20 and the second non-shrinkable panel 30 may be formed from any flexible material that does not have shrinkage or has negligible shrinkage. The term “shrinkage”, as used herein, refers to the use of a packaging film manufactured in such a way that when it is exposed to a certain amount of heat, the film will contract in at least one direction along its length or width, preferably in both directions, reducing its overall surface area. Shrinkage values are obtained by measuring unrestrained shrink of a 10 cm square specimen immersed in a water bath. Four test specimens are cut from a given sample of the film to be tested. Specimens are cut into squares of 10 cm in the machine direction (MD) of the film by 10 cm in the transverse direction (TD) of the film. Each specimen is completely immersed for 5 seconds in a 90 degrees Celsius water bath. The specimen is removed from the bath and the distance between the ends of the shrunken specimen is measured for both the MD and TD of the film specimen. The difference in the measured distance for the shrunken specimen and each original 10 cm side is multiplied by ten to obtain the percent of shrinkage for the specimen for each direction. The MD shrinkage for the four specimens is averaged for the MD shrinkage value and the TD shrinkage for the four specimens is averaged for the TD shrinkage value. For the purposes of this disclosure, the term “non-shrinkable” refers to shrinkage of 5 percent or less in either direction, and the term “shrinkable” refers to shrinkage of greater than 5 percent in either direction. For example, the first non-shrinkable panel 20 and the second non-shrinkable panel 30 may have an unrestrained shrinkage value in the MD or the TD in the range of 0 percent to 5 percent, from 1 percent to 4 percent, from 2 percent to 3 percent, and more specifically of less than 1 percent.
The first shrinkable panel 40 and the second shrinkable panel 50 may also be formed from any flexible material that is characterized as a heat shrinkable film, at 90 degrees Celsius. The term “heat shrinkable film at 90 degrees Celsius”, as used herein, refers to a film having an unrestrained shrinkage value of greater than 5 percent in at least one direction upon application of heat less than or equal to 90 degrees Celsius. For example, the first shrinkable panel 40 and the second shrinkable panel 50 each may have an unrestrained shrinkage value in the MD or the TD in a range of greater than 5 percent to 20 percent; for example, greater than 6 percent, greater than 7 percent, greater than 8 percent, greater than 9 percent, greater than 10 percent, greater than 11 percent, greater than 12 percent, greater than 13 percent, greater than 14 percent, greater than 15 percent, greater than 16 percent, greater than 17 percent, greater than 18 percent, greater than 19, and no greater than 20 percent.
The first non-shrinkable panel 20 is opposite to the second non-shrinkable panel 30. The first shrinkable panel 40 is opposite to the second shrinkable panel 50. The first non-shrinkable panel 20, the second non-shrinkable panel 30, the first shrinkable panel 40, and the second shrinkable panel 50 are conjoined along respectively mutual adjacent edges in the longitudinal direction L that forms panel seals 15 to provide a generally rectangular or square shaped bag 10. The first non-shrinkable panel 20 and the second non-shrinkable panel 30 each function as a gusset G and respectively, and are shown in an unfolded configuration in
The bag 10 further includes a first seal 55. In various embodiments, the first seal 55 is positioned in the transverse direction T and may be at, near or towards 1) the first upper edge of the first non-shrinkable panel 20U and the first upper edge of the second non-shrinkable panel 30U, 2) the first upper edge of the first shrinkable panel 40U and the first upper edge of the second shrinkable panel 50U, or 3) the first upper edge of the first non-shrinkable panel 20U, the first upper edge of the second non-shrinkable panel 30U, the first upper edge of the first shrinkable panel 40U, and the first upper edge of the second shrinkable panel 50U. In an embodiment shown in
The bag 10 includes a second seal 65. The second seal 65 connects the second lower edges 20L, 30L, 40L or 50L, or an area near the second lower edges 20L, 30L, 40L, or 50L. The second seal 65 encloses the bag 10 to provide an inner compartment 60 to contain products 70. After the inner compartment 60 is filled with products 70 and sealed by the second seal 65, the bag 10 can form a flat bottom. The second seal 65 may be, but is not limited to being a pinch bottom seal or a pinch, fold-over and glue seal as is known by one skilled in the art. The term “inner compartment”, as used herein, refers to an interior section of the bag 10 that is configured to hold an item(s) 70 to be packaged in the bag 10. The bag 10 may be referred to as a quad seal bag 10, a side gusset bag 10 or a quattro seal bag 10 as is known by one skilled in the art.
With reference to
It should be understood that the panel seals 15, the first seal 55, the second seal 65, and the gusset seals 62 may be ultrasonic seals, heat seals, pressure seals or any other seal known in the art.
Another embodiment of the bag 10 is illustrated in
Further, the first extension 90 and the second extension 100 may include a first handle forming line of weakness 80 in the first extension 90 and a second handle forming line of weakness 85 in the second extension 100. In an embodiment, the position of each handle forming line of weakness 80 or 85 in the longitudinal direction L is at an equal distance between the first seal 55 and the first upper edges of the first shrinkable panel 40 and the second shrinkable panel 50. The position of the first and second handle forming lines of weakness 80 and 85 along the transverse direction T is at an equal distance between the panel seals 15 that connect the first shrinkable panel 40 and the second shrinkable panel 50 to the first non-shrinkable panel 20 and the second non-shrinkable panel 30. The handle forming lines of weakness 80 and 85 form a perimeter wherein upon removal of the material from within the perimeter a first handle opening and a second handle opening may be formed.
In another embodiment, the first and second handle forming lines of weakness 80 and 85 may form an unenclosed shape that does not form a complete perimeter. In this embodiment, the handle openings may alternatively be formed by breaking the first and second lines of weakness 80 and 85 such that the film is folded back onto itself to form a first handle opening and a second handle opening.
The first and second handle forming lines of weakness 80 and 85 may be formed with perforations, score lines, laser cuts, or any other cutting or scoring method that is known in the art. In an embodiment, the bag 10 may have multiple handle openings, for example to form openings for individual fingers. The first extension 90 and the second extension 100 may be connected to each other with adhesive, ultrasonic seals, heat seals, pressure seals or any other seals known in the art to provide, for example, ease of handling and/or neater appearance.
With reference to
With reference to
In another embodiment, the first extension 90 can be folded towards the first shrinkable panel 40 and the second extension 100 can be folded towards the second shrinkable extension 50; each extension 90 and 100 may be attached to the respective shrinkable panel 40 and 50. The means of attachment may include adhesive, ultrasonic seals, heat seals, pressure seals or any other seals known in the art. The purpose of attaching the first and second panel extensions 90 and 100 to the first shrinkable panel 40 and/or the second shrinkable panel 50 is to provide a reinforced area 130 of the film between the first and second handle openings and the third or fourth handle openings. The reinforced area 130 provides more material in the area where a user will grip or lift the bag 10 leading towards a better hand feel and strength especially when the bag 10 contains heavy items 70.
The bag 10 may contain individual items 70, such as, but not limited to cans, bottles, boxes, etc. The bag 10 may alternatively include bulk items. Non-limiting examples of bulk items include livestock feed, pet food, cat litter, grass seed, fertilizer, landscaping stones, water softener pellets, etc. It should be understood that in embodiments where the first seal 55 only includes the first shrinkable panel 40 and the second shrinkable panel 50, bulk items may be enclosed in a film overwrap forming a pillow pack type of package that would be contained within the bag 10 since an open area is created near the first upper edges of the first and second non-shrinkable panels 20U and 30U. The bag 10 is intended to contain items 70 where the total weight of the bag 10 and its contents is 27 kg (60 pounds) or less. For example, the bag 10 and its contents should include a weight that is reasonable for a person to carry as they are lifting, holding or carrying the bag 10 by the handle openings. The bag 10 and its contents may weigh 0.5 kg, 1 kg, 2 kg, 3 kg, 4 kg, 5 kg, 6 kg, 7 kg, 8 kg, 9 kg, 10 kg, 11 kg, 12 kg, 13 kg, 14 kg, 15 kg, 16 kg, 17 kg, 18 kg, 19 kg, 20 kg, 21 kg, 22 kg, 23 kg, 24 kg, 25 kg, 26 kg, or 27 kg.
The first non-shrinkable panel 20, the second non-shrinkable panel 30, the first shrinkable panel 40, and second shrinkable panel 50 may have any length and width to form a bag 10 of any desired size to accommodate the items 70 contained therein. The width and length of the first and second shrinkable panels 40 and 50 should be based on the after-shrink dimensions of the shrinkable film that is being used for the first and second shrinkable panels 40 and 50. The combination of the first and second non-shrinkable panels 20 and 30 and the first and second shrinkable panels 40 and 50 in bag 10 should securely hold the items 70 while providing an aesthetically pleasing package. For example, the bag 10 is essentially form-fitted to the items 70 and the inner compartment 60 is devoid of excess film that is loose or floppy around the items 70.
The bag 10 may include an opening feature 140 in the first non-shrinkable panel 20, the second non-shrinkable panel 30 or a combination of the first and second non-shrinkable panels 20 and 30. The opening feature 140 may be formed with perforations, score lines, laser cuts, or any other cutting or scoring method that is known in the art. The opening feature 140 may be shaped in a way that is conducive to removing the items 70 from the bag 10 without difficulty. Further, the opening feature 140 may be shaped in such a way that the opening feature does not include a closed perimeter such that when the opening feature 140 is opened from the respective first or second non-shrinkable panel 20 or 30, waste or garbage is not created. In a “no waste” embodiment, the opening feature 140 allows the non-shrinkable panel material to be broken or torn from the first or second non-shrinkable panel 20 or 30 at the perforations, score lines, etc., to form an opening while the portion of the broken or torn non-shrinkable film remains attached to the first or second non-shrinkable panel 20 or 30. The opening feature 140 may be placed in the first shrinkable panel 40 and/or the second shrinkable panel 50. However, when the opening feature 140 is located in the first and/or second non-shrinkable panels 40 and/or 50, the perforations, score lines, laser cuts, etc. will not warp when exposed to heat and will tear as expected.
The bag 10 can be used to contain and carry items 70 such as a beverage can 170 or a plurality of beverage cans 170. For example, the bag 10 could be used to carry 6, 12, 15, 24, or 30 beverage cans 170, which are common counts for current paperboard cartons or packages that contain beverage cans 170. The bag 10 can provide a neat-looking package on the store shelf due to the fitted appearance of the bag 10 around the beverage cans 170. The bag 10 also allows for the ability to have graphics printed on the first and second non-shrinkable panels 20 and 30 and/or the first and second shrinkable panels 40 and 50 without any seams or other seals interrupting the face of any of the panels 20, 30, 40, or 50.
In an embodiment that is shown in
In another embodiment that is not shown, the bag 310 may include a first extension and a second extension. A third handle opening and a fourth handle opening may be respectively located in the first extension and the second extension. The third handle opening and the fourth handle opening are positioned such that they correspond to the first handle opening 282 when the first extension and the second extension are folded towards the first shrinkable panel 240 from the first seal 255. The first and second extensions may be attached to the first shrinkable panel 240. A reinforced area is located in the top panel 295.
With reference to
Each and every document cited in this present application, including any cross referenced or related patent or application, is incorporated in this present application in its entirety by this reference, unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any embodiment disclosed in this present application or that it alone, or in any combination with any other reference or references, teaches, suggests, or discloses any such embodiment. Further, to the extent that any meaning or definition of a term in this present application conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this present application governs.
Unless otherwise indicated, all numbers expressing sizes, amounts, ranges, limits, and physical and other properties used in the present application are to be understood as being preceded in all instances by the term “about”. Accordingly, unless expressly indicated to the contrary, the numerical parameters set forth in the present application are approximations that can vary depending on the desired properties sought to be obtained by a person of ordinary skill in the art without undue experimentation using the teachings disclosed in the present application.
The description, examples, embodiments, and drawings disclosed are illustrative only and should not be interpreted as limiting. The present invention includes the description, examples, embodiments, and drawings disclosed; but it is not limited to such description, examples, embodiments, or drawings. As briefly described above, the reader should assume that features of one disclosed embodiment can also be applied to all other disclosed embodiments, unless expressly indicated to the contrary. Modifications and other embodiments will be apparent to a person of ordinary skill in the packaging arts, and all such modifications and other embodiments are intended and deemed to be within the scope of the present invention.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2018/050604 | 9/12/2018 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2020/055392 | 3/19/2020 | WO | A |
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| Number | Date | Country | |
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| 20220048686 A1 | Feb 2022 | US |
