EASY OPENING PACKAGING ARTICLE
Various embodiments of the present invention are generally directed to an easy opening packaging article, such as an end-seal bag or the like, having a tear initiator and one or more grip assisters. According to various embodiments, the tear initiator and grip assisters are configured to assist a user in opening the packaging article. In particular, the grip assisters are configured to reduce the likelihood that a loose piece of plastic is generated during the opening process, and to reduce the likelihood that undesired tears in the packaging article are generated during the opening process.
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1. Field of the Invention
Various embodiments of the present invention described herein generally relate to packaging articles, particularly heat-shrinkable, easy opening packaging articles for packaging food products.
2. Description of Related Art
Flexible packaging articles made from plastic film are commonly used for the packaging of a variety of products. In particular, food products (e.g., meat) are often vacuum packed in heat-shrinkable, plastic packaging articles. In order to keep packed food products fresh and enhance shelf life, it is important for these packaging articles to possess moisture and oxygen barrier properties, as well as high impact strength, high seal strength, and high puncture resistance. However, packaging articles having these properties are typically tough and difficult to open.
To make tough packaging articles of this type easier to open, recent art suggests providing one or more tear initiators near an edge of a packaging article for initiating a manual tear that can be propagated to open the packaging article and allow a product to be readily removed therefrom. In particular, U.S. Publication No. 2009/0116768 (herein “the '768 publication”) suggests providing grip-assist holes adjacent a tear initiator to assist a user with gripping the packaging article, initiating a tear at the tear initiator, and propagating the tear to open the packaging article. In some cases, these grip-assist holes may be formed by cutting a hole in the packaging article and removing the resulting piece of plastic film to form each grip-assist hole. However, as recognized in the '768 publication, this process produces small, loose pieces of film that may lodge inside the packaging article during manufacturing of the packaging article. To prevent production of these loose pieces of film, the '768 publication suggests cutting a partial hole in the packaging article's film that results in an opening and leaves a hanging chad connected to the packaging article. In this configuration, the aforementioned loose pieces of film are less likely to be produced during manufacturing of the packaging article.
However, when a user opens a packaging article having grip-assisters of this type, the user typically inserts an index finger through a grip-assist hole, pinches the index finger with a thumb, and pulls away from the tear initiator. During this opening process, the user may inadvertently pinch the grip-assister's hanging chad between the index finger and thumb and tear the hanging chad off of the packaging article during opening. Hanging chads inadvertently removed from the packaging article in this way may easily fall into the packaging article as the user is opening the article.
For sellers of products that must not be contaminated with loose plastic pieces, such as meats and other food products, it is important that loose pieces of plastic are not produced during manufacturing of the packaging article or during end use of the packaging particle (e.g., a user opening the article). Accordingly, there is a need in the art for a flexible, easy opening packaging article that can be manufactured and used without the risk of loose pieces of plastic becoming lodged within the packaging article.
BRIEF SUMMARY OF THE INVENTIONVarious embodiments of the present invention are directed to a flexible packaging article. According to various embodiments, the flexible packaging article comprises a plastic film formed into an enclosure for receiving a product and defining at least one openable portion, at least one seal closing the openable portion of the enclosure, at least one article skirt comprising a portion of plastic film extending outwardly from the seal and opposite the enclosure, at least one tear initiator defined on the skirt, the at least one tear initiator being configured for initiating one or more manually-propagated tears capable of being propagated through the seal to open at least the openable portion of the enclosure, and one or more grip assisters defined on the skirt and configured for assisting grip of the plastic film during manual tearing. The one or more grip assisters comprise at least one cut in the skirt defining: an opening, a first hanging chad on a first side of the cut, and a second hanging chad on a second side of the cut. The first hanging chad comprises at least a pair of projected portions and a recessed portion in between the pair of projected portions, and the second hanging chad comprises at least one projected portion aligned with the first hanging chad's recessed portion.
Various other embodiments of the present invention are directed to a flexible packaging article comprising a plastic film formed into an enclosure for receiving a product and defining at least one openable portion, at least one seal closing the openable portion of the enclosure, at least one article skirt comprising plastic film extending outwardly from the seal and opposite the enclosure, at least one tear initiator defined on the skirt, the at least one tear initiator being configured for initiating one or more manually-propagated tears capable of being propagated through the seal to open at least the openable portion of the enclosure, and one or more grip assisters defined on the skirt and configured for assisting grip of the plastic film during manual tearing, the one or more grip assisters comprising at least one curvilinear cut in the skirt defining an opening in the skirt and at least one hanging chad. The curvilinear cut includes first and second ends spaced apart from one another and the hanging chad comprises a base edge defined between the first and second ends of the curvilinear cut, and the lateral distance between the first and second ends of the curvilinear cut defining the hanging chad's base width. The hanging chad extends outwardly from its base edge in a direction away from the at least one tear initiator, and the distance between the hanging chad's base edge and its outermost edge defining the hanging chad's length. The hanging chad further comprises a first outer lobe having a substantially convex rounded edge and a second outer lobe having a substantially convex rounded edge. The first and second outer lobes are defined on lateral sides of the hanging chad and extending laterally past the first and second ends of the curvilinear cut, the lateral distance between the widest points of the first and second outer lobes defining the hanging chad's full width. The ratio of the hanging chad's base width to its full width is between 0.881:1 and 0.75:1.
Reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
The present inventions will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the inventions are shown. Indeed, these inventions may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.
Various embodiments of the present invention are generally directed to an easy opening packaging article, such as an end-seal bag or the like, having a tear initiator and one or more grip assisters. According to various embodiments, the tear initiator and grip assisters are configured to assist a user in opening the packaging article. In particular, the grip assisters are configured to reduce the likelihood that a loose piece of plastic is generated during the opening process, and to reduce the likelihood that undesired tears in the packaging article are generated during the opening process.
End-Seal Bag Having Grip AssistersIn the illustrated embodiment, the end seal 31 is a heat seal sealing the bag's first lay-flat side 12 to the bag's second lay-flat side 14. The end seal 31 can be generated by various methods, such as impulse sealing, melt-bead sealing, thermal sealing, ultrasonic sealing, hot air sealing, hot wire sealing, infrared radiation sealing, ultraviolet radiation sealing, electron beam sealing, or other methods known in the art. Although the end seal 31 extends along an arcuate path across the width of the bag 10 in the embodiment of
The interior volume of the end-seal bag 10 between the bag's end seal 31 and bottom edge 20 comprises an enclosure 19 for receiving a product to be packaged within the end-seal bag 10. As described in greater detail below, once a product is placed within the bag's enclosure 19 (e.g., via the bag opening 22), a packers seal may be applied proximate the bag's bottom edge 20 and the bag 10 may be shrunk around the product to seal the product within the bag 10.
The end-seal bag 10 also includes a skirt 32, which generally comprises the portion of the bag's plastic film outward of the end seal 31 (e.g., the excess film on the non-product side of the end seal 31, between the end seal 31 and top edge 30). As shown in
In the illustrated embodiment, the portion of the bag's first lay-flat side 12 and second lay-flat side 14 defining the skirt 32 are sealed together with a pair of perimeter seals 34 positioned proximate the bag's top edge 30. In the illustrated embodiment, the perimeter seals 34 are heat seals and may be generated using any of the methods referenced above in relation to the end seal 31. As shown in
The skirt 32 also defines a tear initiator 50 and a pair of grip assisters 100. As described in greater detail herein, the tear initiator 50 and grip assisters 100 are, together, configured to enable a user to manually initiate and manually propagate a tear along the end-seal bag 10 in order to open the bag 10 and remove a product contained therein.
In the illustrated embodiment of
With respect to the bag's plastic film, the tear initiator 50 in
Referring back to the illustrated embodiment of
In the illustrated embodiment, the first hanging chad 200 extends outwardly from a first base edge 202, which is defined between the ends 104, 106 of the curvilinear cut 102. As described in more detail herein, the first hanging chad's base edge 202 connects the first hanging chad to the skirt 32 from which it “hangs.” The first hanging chad 200 generally includes a pair of projected portions comprising a first outer lobe 204 and a second outer lobe 206. As shown in
In the illustrated embodiment, the second hanging chad 300 extends outwardly from a second base edge 302 in a direction opposite that of the first hanging chad 200. As shown in
As shown in
As shown in
As described in greater detail below, it is generally desirable for the first hanging chad's base width W1 to be nearly as wide as the first hanging chad's outer width W2, as increasing the chad's base width W1 can improve chad's resistance to being torn off of the skirt 32 by a user. However, it is also desirable for the distances D1, D2 to not be too small, as positioning the ends 104, 106 of the cut 102 away from the chad's widest edges 212, 214 can improve the grip assister's resistance to generating an undesired tear in the skirt 32 when it is used to open the bag 10. Accordingly, the ratio of the first hanging chad's base width W1 to its full width W2 can be between 0.881:1 and 0.75:1.
In addition, the first outer lobe 204 has a length L1 defined by the distance between the first outer lobe's outermost point 216 and the base edge 202. Likewise, the second outer lobe 206 has a length L2 defined by the distance between the second outer lobe's outermost point 218 and the base edge 202. According to various embodiments, the greater of these two lengths L1, L2 defines the “length” of the first hanging chad 200. According to various embodiments, the lengths L1 and L2 can be between 0.3 inches and 0.38 inches. In certain embodiments, the lengths L1 and L2 are the same. For example, in one embodiment, the first outer lobe's length L1 and the second outer lobe's length L2 are 0.34 inches. In such an embodiment, the “length” of the first hanging chad 200 would be 0.34 inches as L1 and L2 are the same.
As shown in
Furthermore, the second hanging chad 300 has a length L3 defined by the distance between the medial lobe's outermost point 319 and the base edge 302. According to various embodiments, the second hanging chad's length L3 can be between 0.12 inches and 0.20 inches. For example, in one embodiment, the second hanging chad's length L3 is 0.19 inches.
In addition, the rounded edge 308 of the medial lobe 304 has a radius of curvature R3. As will be appreciated from
In the illustrated embodiment of
As will be appreciated from
According to various embodiments, the tear initiator 50 and grip assisters 100 are configured to enable a user to manually initiate and manually propagate a tear along the end-seal bag 10 in order to open the bag 10 and remove a product contained therein. As described above, each of the grip assisters 100 includes a curvilinear cut 102 in the skirt 32.
Each grip assister 100 is configured such that its opening 110 is large enough for an adult finger to fit through. When an adult finger is inserted through the opening 110, the hanging chads 200, 300 are generally moved to the position shown in
As shown in
During the aforementioned opening process, each of the user's fingers will apply a force to the skirt 32 proximate the base edge 302 of a respective grip assister 100 (shown in
To prevent such tearing, as described above in relation to
In addition, during the aforementioned opening process, a user will typically insert an index finger through the grip assister's opening 110 and pinch the index finger with a thumb in order to grip the grip assister 100. In the illustrated embodiment of
Furthermore, even where the second hanging chad 200 is inadvertently pinched and pulled away from its base edge 202, the chad 200 is dimensioned to resist being torn off of the skirt 32. For example, the second hanging chad's base width W1 is relatively wide and provides a greater contact area between the chad 200 and skirt 32 than a chad having a narrower base width. By increasing the contact area between the second hanging chad 200 and the skirt 32, the chad 200 is made more resistant to being torn off of the skirt 32 when it is inadvertently pulled. As a result, the end-seal bag 10 having the grip assisters 100 can be opened without generating loose plastic pieces that may fall into the bag 10 and contaminate the product 120.
According to various embodiments, the grip assisters 100 are also capable of being used with a machine configured for opening packaging articles. For example, certain machines may include components (e.g., rods) that are inserted through the grip assisters 100 and pulled away from one another in order to automatically open the end-seal bag 10. Accordingly, it will be understood that the tear initiator 50 and grip assisters 100 can be used by an automated machine to initiate and propagate a tear in the end-seal bag 10.
Further EmbodimentsAs will be appreciated from the description herein, the end-seal bag 10 shown and described in
As further examples,
Furthermore, as will be appreciated from the description herein, the grip assister 100 shown and described in
In various embodiments, the hanging chad 501 can have the same base width, full width, and length dimensions described above in relation to the first hanging chad 200. As such, the grip assister 500 retains many of the advantageous properties of the grip assister 100. For example, as the ends 504,506 of the curvilinear cut 502 defining the hanging chad 501 are positioned inward of the chad's widest edges, the curvilinear cut 502 will be resistant to generating a tear in the skirt 32. Likewise, as the chad 501 has a wide base edge 507 and relatively short length, the chad 501 will be less likely to be inadvertently pinched by a user and, even if it is, will be resistant to tearing off of the skirt 32.
The dimensions of the various grip assisters described herein (e.g., the grip assisters 100, 500, 600) represent certain embodiments of the present invention. As will be appreciated from the description herein, the grip assisters provided in other dimensions and configured to perform as described herein are within the scope of the present invention.
CONCLUSIONMany modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims
1. A flexible packaging article comprising:
- a plastic film formed into an enclosure for receiving a product and defining at least one openable portion;
- at least one seal closing the openable portion of the enclosure;
- at least one article skirt comprising a portion of plastic film extending outwardly from the seal and opposite the enclosure;
- at least one tear initiator defined on the skirt, the at least one tear initiator being configured for initiating one or more manually-propagated tears capable of being propagated through the seal to open at least the openable portion of the enclosure; and
- one or more grip assisters defined on the skirt and configured for assisting grip of the plastic film during manual tearing, the one or more grip assisters comprising at least one cut in the skirt defining: an opening, a first hanging chad on a first side of the cut, and a second hanging chad on a second side of the cut, wherein the first hanging chad comprises at least a pair of projected portions and a recessed portion in between the pair of projected portions, and wherein the second hanging chad comprises at least one projected portion aligned with the first hanging chad's recessed portion.
2. The flexible packaging article of claim 1, wherein each of the one or more grip assisters is defined by a single cut in the skirt.
3. The flexible packaging article of claim 1, wherein the first hanging chad's pair of projected portions comprise a first outer lobe having a substantially convex rounded edge and a second outer lobe having a substantially convex rounded edge.
4. The flexible packaging article of claim 3, wherein the first hanging chad's recessed portion includes a substantially concave rounded edge; and
- wherein the second hanging chad's projected portion comprises a medial lobe having a substantially convex rounded edge.
5. The flexible packaging article of claim 4, wherein the first outer lobe, second outer lobe, and medial lobe are sized such that they cannot be easily grasped by a user.
6. The flexible packaging article of claim 5, wherein the radius of curvature of the first outer lobe's substantially convex rounded edge, the radius of curvature of the second outer lobe's substantially convex outer edge, and the radius of curvature of the medial lobe's substantially convex outer edge are between 0.12 inches and 0.20 inches.
7. The flexible packaging article of claim 1, wherein the ratio of the first hanging chad's base width to its full width is between 0.881:1 and 0.75:1.
8. The flexible packaging article of claim 1, wherein the length of the first hanging chad is between 0.3 and 0.38 inches
9. The flexible packaging article of claim 1, wherein the opening defined by the at least one cut is sufficiently large to enable an adult human finger to extend through the opening.
10. The flexible packaging article of claim 1, wherein the at least one tear initiator comprises one or more longitudinally aligned slits, the one or more slits being configured for generating the manually-initiated, manually-propagated tear in a machine direction along the packaging article.
11. The flexible packaging article of claim 1, wherein the at least one tear initiator comprises one or more longitudinally aligned slits, the one or more slits being configured for generating the manually-initiated, manually-propagated tear in a transverse direction along the packaging article.
12. The flexible packaging article of claim 1, wherein the first hanging chad's pair of projected portions extend away from the at least one tear initiator and in a direction that is generally perpendicular to the tear initiator; and
- wherein the second hanging chad's projected portion extends toward the tear initiator and in a direction that is generally perpendicular to the tear initiator.
13. The flexible packaging article of claim 1, wherein the one or more grip assisters comprise a first grip assister and a second grip assister, the first grip assister being spaced from the tear initiator and positioned on a first side of the tear initiator, and the second grip assister being spaced from the tear initiator and positioned on a second side of the tear initiator.
14. The flexible packaging article of claim 13, wherein the first grip assister, second grip assister, and at least one tear initiator are configured such that, when a user inserts at least one finger into the first and second grip assisters and pulls both the first and second grip assisters in a transverse direction away from the at least one tear initiator, the tear initiator generates a tear that manually propagates from the tear initiator, through the seal, and along at least a portion of the enclosure in a machine direction.
15. The flexible packaging article of claim 13, wherein the at least one cut defining the first grip assister and the at least one cut defining the second grip assister are configured such that stress concentration points generated by a user pulling both the first and second grip assisters in a transverse direction away from the at least one tear initiator are located away from the ends of the cut defining the first grip assister and away from the ends of the cut defining the second grip assister.
16. The flexible packaging article of claim 1, wherein the packaging article has a first side and a second side, the first side of the article being sealed to the second side of the article at the at least one seal;
- wherein the at least one tear initiator comprises a first-side tear initiator defined on the first side of the article and a second-side tear initiator defined on the second side of the article, the first-side and second-side tear initiators being aligned with one another; and
- wherein each of the one or more grip assisters comprises a pair of grip assisters aligned with one another, each grip assister pair comprising a first-side grip assister defined on the first side of the article and a second-side grip assister defined on the second side of the article.
17. The flexible packaging article of claim 1, wherein the at least one seal comprises a heat seal.
18. The flexible packaging article of claim 1, wherein the plastic film is a heat-shrinkable multilayer film.
19. The flexible packaging article of claim 1, wherein the packaging article is a lay-flat, end-seal bag and the plastic film comprises seamless plastic film tubing.
20. The flexible packaging article of claim 1, wherein the packaging article is a lay-flat, side-seal bag and the plastic film comprises seamless plastic film tubing.
21. A flexible packaging article comprising:
- a plastic film formed into an enclosure for receiving a product and defining at least one openable portion;
- at least one seal closing the openable portion of the enclosure;
- at least one article skirt comprising plastic film extending outwardly from the seal and opposite the enclosure;
- at least one tear initiator defined on the skirt, the at least one tear initiator being configured for initiating one or more manually-propagated tears capable of being propagated through the seal to open at least the openable portion of the enclosure; and
- one or more grip assisters defined on the skirt and configured for assisting grip of the plastic film during manual tearing, the one or more grip assisters comprising at least one curvilinear cut in the skirt defining an opening in the skirt and at least one hanging chad, wherein: the curvilinear cut includes first and second ends spaced apart from one another and wherein the hanging chad comprises a base edge defined between the first and second ends of the curvilinear cut, the lateral distance between the first and second ends of the curvilinear cut defining the hanging chad's base width; the hanging chad extends outwardly from its base edge in a direction away from the at least one tear initiator, the distance between the hanging chad's base edge and its outermost edge defining the hanging chad's length; the hanging chad further comprises a first outer lobe having a substantially convex rounded edge and a second outer lobe having a substantially convex rounded edge, the first and second outer lobes being defined on lateral sides of the hanging chad and extending laterally past the first and second ends of the curvilinear cut, the lateral distance between the widest points of the first and second outer lobes defining the hanging chad's full width; and the ratio of the hanging chad's base width to its full width is between 0.881:1 and 0.75:1.
22. The flexible packaging article of claim 21, wherein the hanging chad's base width is between 0.69 inches and 0.88 inches and the hanging chad's full width is between 0.75 inches and 1.0 inches.
23. The flexible packaging article of claim 21, wherein the hanging chad's length is between 0.3 inches and 0.38 inches.
24. The flexible packaging article of claim 21, wherein the enclosure has a closed bottom, a closed first side edge, a closed second side edge, and an open top, and
- wherein the at least one seal comprises a plastic-film-to-plastic-film seal defining at least a portion of at least one member selected from the group consisting of: the closed bottom, the closed first side edge, and the closed second side edge.
25. The flexible packaging article of claim 21, wherein the packaging article has a first side and a second side, the first side of the article being sealed to the second side of the article at the at least one seal;
- wherein the at least one tear initiator comprises a first-side tear initiator defined on the first side of the article and a second-side tear initiator defined on the second side of the article, the first-side and second-side tear initiators being aligned with one another; and
- wherein each of the one or more grip assisters comprises a pair of grip assisters aligned with one another, each grip assister pair comprising a first-side grip assister defined on the first side of the article and a second-side grip assister defined on the second side of the article.
26. The flexible packaging article of claim 21, wherein the at least one tear initiator comprises one or more longitudinally aligned slits, the one or more slits being configured for generating the manually-initiated, manually-propagated tear in a machine direction along the packaging article.
27. The flexible packaging article of claim 21, wherein the at least one tear initiator comprises one or more longitudinally aligned slits, the one or more slits being configured for generating the manually-initiated, manually-propagated tear in a transverse direction along the packaging article.
28. The flexible packaging article of claim 21, wherein the at least one seal comprises a heat seal.
29. The flexible packaging article of claim 21, wherein the plastic film is a heat-shrinkable multilayer film.
30. The flexible packaging article of claim 21, wherein the packaging article is a lay-flat, end-seal bag and the plastic film comprises seamless plastic film tubing.
31. The flexible packaging article of claim 21, wherein the packaging article is a lay-flat, side-seal bag and the plastic film comprises seamless plastic film tubing.
Type: Application
Filed: Sep 28, 2011
Publication Date: Mar 28, 2013
Applicant: CRYOVAC, INC. (Duncan, SC)
Inventors: Robert A. Odabashian (Greer, SC), Richard K. Watson (Simpsonville, SC)
Application Number: 13/247,747
International Classification: B65D 65/28 (20060101); B65D 33/16 (20060101); B65D 65/32 (20060101);