AU2007226508A1

AU2007226508A1 - Blister pack with integral access tool

Info

Publication number: AU2007226508A1
Application number: AU2007226508A
Authority: AU
Inventors: John A. Gelardi; William Roger Rigby
Original assignee: Meadwestvaco Corp
Current assignee: WestRock MWV LLC
Priority date: 2006-03-15
Filing date: 2007-03-15
Publication date: 2007-09-20
Also published as: WO2007106901A1; US20090057185A1; EP1996483A1; WO2007106901B1

Description

WO 2007/106901 PCT/US2007/064100 BLISTER PACK WITH INTEGRAL ACCESS TOOL TECHNICAL FIELD This invention relates generally to blister packs and, more specifically, to 5 blister packs including a tool for accessing an interior of a blister. BACKGROUND OF THE INVENTION A blister pack is a type of package that protects one or more items or articles, by sealing the articles between a substantially planar substrate and a 10 concave compartment structure. The concave compartment structure is typically referred to as a blister or a bubble. Blisters are typically formed of a plastic or foil type material and the substrate is frequently paper, foil, plastic, paperboard or a laminate of one or more of these materials. The encased article is typically accessed by pushing the article, from the bubble side of the 15 blister pack, until the article breaks through the substrate. Frequently, the blister pack includes lines of demarcation that define each segment having an individual blister. Each line of demarcation may be a frangible line, such as a perforated line, that facilitates separation of a segment of a blister from the blister pack. 20 A problem with blisters is that it is often difficult to push the product encased in the blister through the blister substrate. This problem can exist because the substrate is made particularly durable to maintain the freshness and efficacy of the encased product, or to inhibit removal of the encased 1 WO 2007/106901 PCT/US2007/064100 product in order to increase the child-resistance rating. Thus, a need exists for a means for facilitating removal of an encased item or article from a blister. One solution has entailed using a tool, which is not packaged with the blister pack, to puncture or cut the substrate of a blister. However, a tool such 5 as this is not always available in every environment. Further, the tool may have a cutting blade that is a hazard to users. Another solution is to include a cutting apparatus in, or as part of, the package that includes the blister pack. However, these cutting apparatuses are manufactured separately from the blister packs and the rest of the package, thereby adding to material and 10 manufacturing costs. Although prior attempts to solve the problem of removing an encased article from its protective seal are known, there remains a need for a convenient and cost effective means for safely and efficiently penetrating the substrate or protective seal of a blister. 15 SUMMARY OF THE INVENTION The present invention overcomes the shortcomings of the prior art by providing a blister pack that includes at least one blister segment with substrate covering a blister bubble opening and at least one integral tool for penetrating 20 the substrate of the blister segment. According to one aspect of the invention the tool is at least partially formed from a flanged portion of the blister pack. The blister pack includes a tray and a substrate. The flanged portion of the blister pack includes a substantially planar portion of the tray to which the substrate is attached. Lines 2 WO 2007/106901 PCT/US2007/064100 of demarcation, including frangible lines and perforated lines, define the tool in the blister pack and facilitate detachment of the tool from the blister pack. According to another aspect of the invention, the tool comprises a reinforced region and a blade region for cutting and/or puncturing substrate 5 material. The reinforced region reinforces the blade region such that the blade region can penetrate, puncture or cut the substrate of a blister without undue deformation that might limit the tool's effectiveness. In one facet of this aspect, the reinforced region is in the form of a raised member. In another facet of this aspect the raised member is offset from an edge of the tool. In an additional 10 facet of this aspect, the raised member is proximate a cutting edge of the tool. According to still another aspect of the invention, the tool is at least partially formed from a flanged portion of the blister pack and reinforcement is provided by a folded-over tab structure. The reinforced region of the tool is formed by folding the tab structure of the flanged portion along a fold line. 15 According to an additional aspect of the invention, the tool includes a blister bubble that defines the reinforced region. According to yet another aspect of the invention, a system is provided including a blister pack and a package. The blister pack includes at least one blister. A tool for penetrating the substrate of a blister of the blister pack is 20 integral to the package. According to further aspect of the invention, a method for accessing an article in a blister in a blister pack is provided. The blister pack includes at least one blister and at least one tool. The method includes detaching a tool from the blister pack and using the tool to penetrate the substrate of a blister. 3 WO 2007/106901 PCT/US2007/064100 Other systems, methods, features, and advantages of the present invention will be or become apparent to one with skill in the art upon examination of the following drawings and detailed description. All such additional systems, methods, features, and advantages are included within the 5 scope of the present teaching and are protected by the accompanying claims. The foregoing has broadly outlined some of the aspects and features of the present invention, which should be construed to be merely illustrative of various potential applications of the invention. Other beneficial results can be obtained by applying the disclosed information in a different manner or by 10 combining various aspects of the disclosed embodiments. Accordingly, other aspects and a more comprehensive understanding of the invention may be obtained by referring to the detailed description of the exemplary embodiments taken in conjunction with the accompanying drawings, in addition to the scope of the invention defined by the claims. 15 BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a perspective view of an exemplary embodiment of blister pack, according to the present invention. FIG. 2 is a plan view showing the blister pack of FIG. 1, according to the 20 present invention. FIG. 3 is a perspective view showing the blister pack of FIG. 1, wherein an exemplary embodiment of a blister segment is being detached from the blister pack, according to the present invention. 4 WO 2007/106901 PCT/US2007/064100 FIG. 4 is an elevation view showing the blister pack of FIG. 1, with an exemplary embodiment of a detached blister segment poised for use as an exemplary embodiment of a tool to puncture substrate over an opening of a selected blister bubble, according to the present invention. 5 FIG. 5 is an elevation view similar to FIG. 4, showing the exemplary embodiment of the tool being used to puncture substrate over an opening of a selected blister bubble, according to the present invention. FIG. 6 is a perspective view of the blister pack of FIG. I and tool in use as shown in FIG. 5, according to the present invention. 10 FIG. 7 is a perspective view that is essentially the same view as FIG. 6 but with a reinforcing tab corner folded in reverse of its position in FIG. 6 and disposed on the side of the blister segment opposite the blister bubble, according to the present invention. FIGs. 8 and 9, are related perspective views showing two steps (pre 15 puncturing and puncturing, respectively) in the use of an exemplary embodiment of a detached tool to open a detached blister segment, according to the present invention. FIG. 10 is a perspective view of an exemplary embodiment of a tool disposed beside an opened blister segment, according to the present invention. 20 FIG. 11 is a perspective view of an exemplary embodiment of a tool using a blade portion that is proximate a reinforcing raised member to puncture substrate over a blister bubble opening of a blister segment, according to the present invention. 5 WO 2007/106901 PCT/US2007/064100 DETAILED DESCRIPTION As required, detailed embodiments of the present invention are disclosed herein. It must be understood that the disclosed embodiments are 5 merely exemplary of the invention that may be embodied in various and alternative forms, and combinations thereof. As used herein, the word "exemplary" is used expansively to refer to embodiments that serve as an illustration, specimen, model, or pattern. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of 10 particular components. In other instances, well-known components, systems, materials, or methods have not been described in detail in order to avoid obscuring the present invention. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the 15 art to variously employ the present invention. Referring now to the drawings, wherein like numerals indicate like elements throughout the several views, the drawings illustrate certain of the various aspects of exemplary embodiments of a blister pack that includes at least one blister and at least one tool for penetrating the substrate of a selected 20 blister. The tool includes a strengthening element that provides structural rigidity to the tool in general and to a penetrating corner of the tool in particular. To help distinguish the various elements of the invention, the term "blister bubble" will be used to refer to the cavity, blister, bubble or compartment to which access is sought through use of the tool. The term 6 WO 2007/106901 PCT/US2007/064100 "blister segment" will be used to refer to the segment of the blister pack tray that may be separated from the tray itself. The blister segment comprises a blister bubble at least partially surrounded by a flange and having substrate covering the opening to the interior of the blister bubble. 5 Referring first to FIGs. I and 2, an exemplary blister pack 10 is illustrated that includes multiple individual blister segments 12 (best shown in FIG. 3). The blister pack 10 includes a tray Y that can be formed from a plastic type sheet to include cavities or bubbles 14. The tray Y of the exemplary embodiment is a substantially planar structure having blister bubbles 14. The 10 size and shape of the bubbles 14 are design choices that are made such that one or more of an article can be disposed within a blister bubble 14. The blister pack 10 also includes a planar substrate 16 (shown in FIG. 7) that is formed from one or more layers of material. The substrate 16 may be paper, foil, plastic, paperboard or a laminate of one or more of these materials. The 15 substrate 16 is attached to a substantially planar portion of the tray Y to cover the openings of the blister bubbles 14 and thereby enclose or seal articles within the blister bubbles 14. The planar portion of the tray Y and the corresponding attached portion of the substrate 16 define a flanged portion F of the blister pack 10, and of each 20 blister segment 12. Each portion of the substrate 16 that is disposed over the open end of a blister bubble 14 defines a gate 18 (shown in FIG. 7). Each blister segment 12 is defined in the blister pack 10 by lines of demarcation 20. Referring to FIGs. 1, 2 and 3 simultaneously, the lines of demarcation 20 facilitate detachment of a single blister segment 12 from the blister pack 10. 7 WO 2007/106901 PCT/US2007/064100 For example, the lines of demarcation 20 may be frangible lines or perforated lines. In general, the lines of demarcation 20 may be typical weakened lines of severance. Referring now to FIG. 3, in an exemplary embodiment, the flanged 5 portion F of each blister segment 12 includes a penetrating corner 32 and a folding corner 34. The folding corner 34 is a tab at a corner of the blister segment 12 that is defined in part by a fold line 30. The penetrating corner 32 and the folding corner 34 are defined in part by a common first edge El and are further defined by an opposite edge E2, E3, respectively. 10 An end of the fold line 30 that is adjacent to the penetrating corner 32, or is otherwise adjacent to the first edge E1, is offset from the edge E2 by a distance L1. Opposite ends of the fold line 30 are offset a distance L2, L3 from the edges E3, El, respectively. In the exemplary embodiment, the distances L2, L3 are substantially the same. 15 Referring to FIGs. 5 and 6, the folding corner 34 of the blister segment 12 is folded along fold line 30 and toward the blister bubble 14. Alternatively, the folding corner 34 may be folded away from the blister bubble 14, as shown in FIGs. 7-10. The folded corner 34 and the flanged portion F, which the folding corner 34 substantially overlaps, define a reinforced region R1. A blade 20 region B1 of the flanged portion F is defined between the reinforced region R1 and the edges El, E2. The blade region BI includes the penetrating corner 32. The reinforced region RI increases the structural rigidity of the adjacent blade region B1, including the penetrating corner 32, such that the blade region B1 can withstand an increased applied force before substantially bending, 8 WO 2007/106901 PCT/US2007/064100 buckling or otherwise deforming. Accordingly, the exemplary blister segment 12 can be used as a tool T1 for penetrating the gate 18 of a selected blister segment 12'. The selected blister segment 12' to be opened may be attached to the blister pack 10, as shown in FIGs. 4-7, or may be detached from the 5 blister pack 10, as shown in FIGs. 8 and 9. To access articles that are sealed in a selected blister segment 12', the penetrating corner 32 of the tool TI is forced through the gate 18 of the selected blister segment 12', as shown in FIG. 5, thereby penetrating, or puncturing, the selected blister segment 12'. The edges El, E2 of the tool TI 10 can be used to make and enlarge a cut C, as shown in FIG. 7, in order to facilitate access to the article. To access the encased article, the cut C may be made to facilitate tearing of the gate 18 as the article is pushed through it, to facilitate tearing gate 18 with a finger, or to create an opening that is large enough to allow a user to remove the article. 15 Referring again to FIGs. 1-4, in an exemplary embodiment, each blister segment 12 (shown in FIG. 3) includes a reinforcing bubble 40 that is disposed in a penetrating corner 42 of the flanged portion F. In this embodiment, reinforcing bubbles 40 are formed in the tray Y along with bubbles 14. Each reinforcing bubble 40 can be any suitable size or shape such that it increases 20 the effective thickness of the flanged portion F to provide a reinforced region. The reinforcing bubble 40 may be disposed such that it is offset from the edges E2, E4. A blade region B2 (shown in FIG. 3) of the flanged portion F is defined between the reinforcing bubble 40 and edges E2, E4. The reinforcing bubble 40 increases the structural rigidity of the blade region B2, including the 9 WO 2007/106901 PCT/US2007/064100 penetrating corner 42, such that the blister segment 12 can be used as a tool T2 for penetrating the gate 18 of a selected blister segment 12'. Referring to now FIG. 11, the penetrating corner 42 of the tool T2 is forced through the gate 18 of a selected blister segment 12' thereby 5 penetrating the selected blister segment 12'. Once the tool T2 has punctured the blister to form a cut C, the tool T2 can be used to propagate the cut C to facilitate access to the article. It should be noted that the reinforcing or structural element that provides the reinforced region is not limited to a reinforcing bubble 40 formed from the 10 tray Y. Rather, the structural element may be a protuberance in the form of a rib, a raised element, or an element that is attached to the tray Y or substrate 16 to provide the same functionality. It should also be noted that the tools T1, T2 do not have to be integral to a blister segment 12, as described above. For example, the tool can be a 15 flanged portion F of the blister pack 10, defined by lines of demarcation 20, or attached by a perforated edge. In additional alternative embodiments, the blister pack 10 is packaged in a carton (not shown). The carton includes a flap with a reinforcing or structural element, such as a fold line, such that the flap can be used as a tool for 20 accessing a selected blister segment 12'. The law does not require and it is economically prohibitive to illustrate and teach every possible embodiment of the present claims. Hence, the above-described embodiments are merely exemplary illustrations of implementations set forth for a clear understanding of the principles of the 10 WO 2007/106901 PCT/US2007/064100 invention. Variations, modifications, and combinations may be made to the above-described embodiments without departing from the scope of the claims. All such variations, modifications, and combinations are included herein by the scope of this disclosure and the following claims. 11

Claims

1. A blister pack (10), comprising.: a first blister segment (12') integrally formed with said blister pack (10), said first blister segment (12') comprising a blister bubble (14) having an opening, said opening being substantially covered by a substrate (18), and a tool (TI, T2) that is integrally formed with said blister pack (10), and separate from said first blister segment (12'), said tool (T1, T2) being detachable from said blister pack (10) and adapted to penetrate said substrate (18) to gain access to the interior of said blister bubble (14).

2. The blister pack (10) of claim 1, wherein said tool (T1, T2) is detachable from said blister pack (10) along at east one weakened line of demarcation (20).

3. The blister pack (10) of claim 1, wherein said tool (TI, T2) comprises a flange (F) having a penetrating member (32, 42) for penetrating said substrate (18).

4. The blister pack (10) of claim 3, wherein said flange (F) comprises a reinforcement member (34, 40) to support said penetrating member (32, 42).

5. The blister pack (10) of claim 4, wherein said reinforcement member (34, 40) comprises a protuberance (40) that is disposed proximate said penetrating member (32, 42). AMENDED SHEET (ARTICLE 19) 16 WO 2007/106901 PCT/US2007/064100

6. The blister pack (10) of claim 4, wherein said reinforcement member (34, 40) comprises a tab (34) foldably joined to said flange (F).

7. The blister pack (10) of claim 6, wherein said tab (34) is adapted to fold out of a plane defined by said flange (F).

8. The blister pack (10) of claim 1, wherein said tool (TI, T2) is integral to a second blister segment (12).

9. The blister pack (10) of claim 8, wherein said tool (T1, T2) comprises a flange (F) of said second blister segment (12), said flange (F) having a penetrating member (32, 42) for penetrating said substrate (18) of said first blister segment (12').

10. The blister pack (10) of claim 9, wherein said flange (F) further comprises a reinforcement member (34, 40) to support said penetrating member (32, 42).

11, The blister pack of claim 10, wherein said reinforcement member (34, 40) comprises a protuberance (40) that is disposed proximate said penetrating member (32, 42)

12. The blister pack of claim 10, wherein said reinforcement member (34, 40) comprises a tab (34) foldably joined to said flange (F).

13. The blister pack of claim 12, wherein said tab (34) is adapted to fold out of a plane of said flange (F). AMENDED SHEET (ARTICLE 19) 17