FINGER TAB

Abstract

A carton having a finger tab of a flap is easily opened by users but is also able to withstand the rigors of shipping and handling.

Description

FIELD OF THE INVENTION

The present invention is directed to a carton comprising a finger tab for an openable flap.

BACKGROUND OF THE INVENTION

Rectangular cartons containing, for example a tube of toothpaste, are ubiquitous. Users often open the carton to access the contents of the carton from either end (i.e., smallest dimension of the sides). Users report being frustrated in opening a side panel and further frustrated by sometimes having to shake the carton to jostle the contents free from the interior of the carton (given the relatively small opening that is provided by the side panel). There is a need for users to more easily access the tube of toothpaste contained in the carton. Moreover, there is a need by manufacturers to connote a premium package and opening experience to users to provide a premium product and experience.

On approach to address the need is the use of a flap that on one or more sides of the carton, i.e., along the length. In one example, the flap extends across the top and front sides of the carton. The use of a finger tab is used to initiate the opening of the flap. However, the finger tab must be relatively easy to open by the user, but have enough structural integrity not be opened prematurely (e.g., during manufacturing, shipping, or handling). If the finger tab opens prematurely, potential user may view the overall product negatively as lacking quality or as opening to allow contaminants to enter the carton. However, if the finger tab is difficult to open, the user may become frustrated with the packaging experience and may view of the overall product negatively as lacking quality.

SUMMARY OF THE INVENTION

The present invention is based on the surprising discovery, at least in part, that a finger tab comprising a first intersection, wherein the first intersection is formed by a first ½ cut of weakness intersecting a first perforation that is at least 1 mm in length, provides for the finger tab that is easy to open by the user but does not open prematurely (under typical shipping and handling conditions). Accordingly, one aspect of the invention provides a carton comprising a finger tab for initiating the opening of a flap, wherein the finger tab comprises a first intersection, wherein the first intersection is formed by a first ½ cut line of weakness intersecting a first perforation. Another aspect provides for a method of opening a carton comprising the step of digitly pressing the finger tab inward to grasp and then open the flap of the carton to expose the interior of the carton. Another aspect provides the use of a finger tab to open a flap of a carton, wherein the flap is openable from a front side and an adjoining top side, that is easy to open by the user but does not open prematurely (under typical shipping and handling conditions).

These and other features, aspects and advantages of specific embodiments will become evident to those skilled in the art from a reading of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The embodiments set forth in the drawings are illustrative in nature and not intended to limit the invention defined by the claims. The following detailed description of the illustrative embodiments can be understood when read in conjunction with the following drawings, and in which:

FIG. 1 is a perspective view of a carton comprising an inventive finger tab for initiating the opening of a flap;

FIG. 2 is a front view of the finger tab of FIG. 1;

FIG. 3 is a front view of a first comparative finger tab (A);

FIG. 4 is a front view of a first comparative finger tab (B);

FIG. 5 is a front view of a first comparative finger tab (C);

FIG. 6 is a front view of a first comparative finger tab (D);

FIG. 7 is a front view of a first comparative finger tab (E);

FIG. 8 is a front view of a first comparative finger tab (F); and

FIG. 9 is a front view of a first comparative finger tab (G);

DETAILED DESCRIPTION OF THE INVENTION

The following text sets forth a broad description of numerous different embodiments of the present disclosure. The description is to be construed as exemplary only and does not describe every possible embodiment since describing every possible embodiment would be impractical, if not impossible. It will be understood that any feature, characteristic, component, composition, ingredient, product, step or methodology described herein can be deleted, combined with or substituted for, in whole or part, any other feature, characteristic, component, composition, ingredient, product, step or methodology described herein. Numerous alternative embodiments could be implemented, using either current technology or technology developed after the filing date of this patent, which would still fall within the scope of the claims.

FIG. 1 is a perspective view of a carton (1) comprising a finger tab (3) for initiating the opening of a flap (5). A longitudinal axis (1) is along the length of the carton (10). The carton is preferably rectangular, preferably made from paperboard, and preferably having dimensions that are typical of those containing oral care products such as toothpaste. For example, the tube of toothpaste may contain from 5 g to 300 g of toothpaste, preferably from 80 g to 250 g; non-limiting examples include 90 g, 140 g, and 300 g of toothpaste.

The flap (5) is preferably made from paperboard, and more preferably the carton (1) is made from paperboard. The paperboard has a density from 50 g/m2 to 700 g/m2, preferably from 100 g/m2 to 600 g/m2, more preferably from 200 g/m2 to 500 g/m2, yet more preferably from 300 g/m2 to 400 g/m2. The paperboard may be 100% virgin material, 100% recycled material, or a combination thereof, preferably the paper board is virgin material. The six-sided rectangular carton (1) has the following dimensions: a length of the carton (3) (measured along the longitudinal axis (10)) is from 10 cm to 40 cm, preferably 18 cm to 30 cm. The width of the carton (1) is from 3 cm to 9 cm, preferably 4 cm to 8 cm. The height of the carton (3) is from 2 cm to 8 cm, preferably from 3 cm to 7 cm. The interior volume of the carton (1), when devoid of contents, is from 300 cm3 to 900 cm3, preferably from 400 cm3 to 800 cm3. Although not shown, preferably the carton contains an oral care product (e.g., toothbrush, dentifrice, combination thereof) in the interior volume, more preferably the oral care product is a tube of toothpaste. The flap (5) of the carton (1) is formed as part of the front side (4) and top side (2), wherein the front and top sides (4, 2) are adjoining. The front and top sides (2) are along the longitudinal axis (10). These sides (4, 2) are distinguished from the left and right end sides (18, 8), which are in a plane orthogonal to the longitudinal axis (10). The finger tab (3), or more specifically the body finger tab (2), is located on the front side (4) preferably located in the in the middle ⅓ of either the length or width dimension (of the front side (4)), more preferably both the length and width dimension (of the front side (4)). The flap (5) is defined by a first line of weakness (11) and second line of weakness (12) that are opposing each other. Preferably the carton (1) has bilateral symmetry along a plane orthogonal and at a midpoint to the longitudinal axis (10). It is this plane of bilateral symmetry which the first and second lines of symmetry (11, 12) are opposing each other. There is a foldable edge (14), between the interface of the top side (2) and the back side (16), which is hinge for the flap (5) upon opening. The back side (16) opposes the front side (4). The top side (2) is between the back side (16) and the front side (4). The first line of weakness (11) and the second line of weakness (12) converge on the front side (4) to the finger tab (3). The flap (5) may occupy from 60% to 100%, preferably 70% to 95% of the surface area of the top side (2) of the carton (1). And the flap (5) may further occupy from 15% to 95%, preferably 20 to 90% of the surface rea of the front side (4) of the carton (1). The flap (5) contiguously extends from the top and front sides (2, 4).

The user uses a digitly (i.e., with a finger) presses the finger tab (3) inward (toward the interior of the carton (1) to break the press tab open from the front side (4) to grasp a now exposed edge of the flap (5) and pull the flap (5) open breaking the first and second lines of weakness (11, 12) to expose the interior of the carton (5) and the product contained therein (e.g., oral care product such a tube of toothpaste (not shown)). The flap (5) is openable from the front side (4) and adjoining top side (2). The press tab (3) and flap (2) is easy to open by the user but does not open prematurely (under typical shipping and handling conditions).

Without wishing to be bound by theory, this relatively central location of the finger tab (3) may help in balancing easy of opening and robust integrity (during typical shipping and handling) given the observation that the pressure upon opening the finger tab will be generally equal throughout the front side of the carton (vs. being biased toward a corner). Moreover, this need for balance is particularly acute in paperboard given the relatively minimal thickness and properties of the paperboard material.

Turning to FIG. 2, the left and right lines of weakness (11, 12) have a least a portion of as a ½ cut line of weakness proximate the first and second intersection (31, 32), respectively. The line of weakness may include any suitable type including, for example, perforation lines, die cut lines, or score line, to facilitate the opening of the flap (5). Preferably the entire left and right line of weakness (11, 12) are ½ cut line of weakness from the foldable edge (14) to the first and second intersection (31, 32). A “½ cut line of weakness” means a line of weakness formed when a first die having a first blade cuts into the carton precursor (e.g., paperboard) about halfway through its thickness and an opposing second die having a second blade also cuts into the carton precursor about halfway through the thickness. The cuts made by the respective blades are made in a direction transverse relative to the thickness of the carton precursor. The cuts (for the first and second blades) are not made directly opposing each other, but rather, in a distance from each other from 2 mm to 10 mm, preferably from 3 mm to 8 mm, more preferably from 4 mm to 7 mm, alternatively about 4 mm, 5 mm, or 6 mm. Accordingly, each cut line (from the first and second blade) will generally mimic the other (but at the indicated distances). The user, upon unfolding open the flap (5), is delaminating the carton precursor between the two opposing cut lines (of the ½ cut line of weakness). In one example, the carton precursor is a paperboard having a basis weight of 350 grams per square meter. Preferably the length of the first and second ½ cut line of weakness (11, 12) are each independently at least 1 cm, preferably at least 2 cm, more preferably at least 3 cm, as measured from each respective first and second intersection point (31, 32). One skilled in the art will appreciate that the distances between the first and second blades (e.g., 5 mm) will converge (i.e., distances between the blades will decrease) as the line of weakness (11, 12) meets the first and second intersection (31, 32), respectively. One advantage of a ½ line of weakness is the smooth finish provided on the surface of the carton (1), thereby providing graphics and artwork that appears of a high quality than otherwise would be if available from other types of lines of weakness that otherwise deform the smooth finish of the paperboard.

The finger tab (5) comprises a first intersection (31) is formed by a first ½ cut line of weakness (11) intersecting a first perforation (21), where the first perforation is at least 2 mm. Similarly, a second intersection (32) is formed by a second ½ cut line of weakness (12) intersecting a second perforation (22). The first and second intersection (31, 32) are opposing each other. At least one linkage (7A) is in-between the first and second perforation (21, 22) to form a first perforation line (41). “Perforation” made a cut through the thickness of a side, i.e., paperboard, of the carton (1). Preferably the cut is made an angle perpendicular to the side surface. “Linkage” means that portion of the side, i.e., paperboard, along the perforation line, that is not cut. A perforation line may be linear or arced or combination thereof.

Preferably the length of the first perforation (21) is from 2 mm to 7 mm, preferably greater than 2 mm to 5 mm, more preferably from 2.5 mm to 4.5 mm. Non-limiting examples include 3, 3.5, 3.8, 4.1, 4.5 mm in length. Preferably the length of the second perforation (22) is at least 2 mm, preferably from 2 mm to 7 mm, more preferably greater than 2 mm to 5 mm, yet more preferably from 2.5 mm to 4.5 mm. Non-limiting examples include 3, 3.5, 3.8, 4.1, 4.5 mm in length. Based on observation from comparative samples (discussed below) and without wishing to be bound by theory, the length of the first and second perforation (21, 22) and that the intersect the first and second intersection (31, 32) are important factors in the finger tab (3) demonstrating the balance of easy of opening but avoiding premature opening (from typical shipping and handling).

The first perforation line (41) may further comprises a plurality of additional perforations (70A-70E), preferably from 2 to 16 additional perforations, more preferably from 3 to 8 additional perforations. Preferably each of the plurality of additional perforations (70A-70E) are independently from 0.5 mm to 6 mm, preferably from 1 to 5 mm, more preferably 2 to 4 mm in length. Preferably each of the plurality of additional perforations (70A-70E) are the same length. In the non-limiting example illustrated in FIG. 2, there is a total of seven perforations (i.e., first, second (21, 22) which are 3.8 mm in length; and additional perforations (70A-70E)) which are each 3 mm in length).

Preferably the length of the least one linkage (7A) is from 0.1 mm to 3 mm, preferably from 0.3 mm to 2 mm, more preferably from 0.5 mm to 1.5 mm, yet more preferably from 0.7 mm to 1.3 mm. Preferably the first perforation line (41) further comprises a plurality of additional linkages (7B-7F). This plurality of additional linkages (7B-7F) may number from 2 to 18 additional linkages, more preferably from 3 to 9 additional linkages. Preferably each of the plurality of additional linkages (7B-7F) are independently from 0.1 mm to 3 mm, preferably from 0.3 mm to 2 mm, more preferably from 0.5 mm to 1.5 mm in length. In one non-limiting example illustrated in FIG. 2, there is a total of six linkages (7A-7F) (of the first perforation line (41)) each 1 mm in length.

The linear distance between the first intersection (31) and the second intersection (32) is from 10 mm to 70 mm, preferably from 20 mm to 50 mm, more preferably from 24 mm to 34 mm. For example, the distance between the first intersection (31) and the second intersection (32) is 25, 26, 27, 28, 28.6, 29, 30, or 31 mm, preferably 28.6 mm. The first perforation line (41) between the first and second intersections (31, 32) is substantially linear, preferably linear.

Preferably the finger tab (3) further comprises a third perforation (33) intersecting at the first intersection (31), and more preferably a fourth perforation (44) intersecting at the second intersection (32). At least a second linkage (9A) is in-between the third and fourth perforations (33, 44, respectively) to form a second perforation line (42). Preferably the first perforation line (41) is proximate the flap (5) while the second perforation line (42) is distal the flap (5) (i.e., proximate to a non-flap region (6)). Preferably the second perforation line (42) is nonlinear, preferably arced. Arc may have constant radius or inconstant radius. A regular arc has a constant radius. More preferably the second perforation line (32) is regular arc having a radius from 10 mm to 30 mm, preferably from 12 mm to 24 mm, more preferably from 15 mm to 21 mm; wherein the center point of the radius is in the flap (5). Non-limiting examples of a radius is 16, 17, 18, 18.4, 19, or 20 mm.

The second perforation line (42) preferably further comprises a plurality of additional linkages (9B-9E), preferably from 2 to 12 additional linkages, more preferably from 3 to 5 additional linkages. Preferably each of the plurality of additional linkages are independently from 0.1 mm to 6 mm, preferably from 0.2 mm to 2 mm, more preferably from 0.5 mm to 1.5 mm in length (wherein length is measured along the second perforation line). For example, if the second perforation line is arced, then the length is measured along the arc. In the non-limiting example illustrated in FIG. 2, there is a total of 5 linkages, i.e., 9A-9E (of the second perforation line (42)) each 1 mm in length (along the arc).

The second perforation line (42) preferably further comprises a plurality of perforations (90A-90D), preferably from 2 to 12 additional perforations, more preferably from 3 to 5 additional perforation. Preferably each of the plurality of additional perforations are independently from 4 mm to 7 mm, preferably from 4.5 mm to 6 5 mm, more preferably 5 mm to 6 mm in length, (wherein length is measured along the second perforation line.) The additional perforation may have a length, as a non-limiting example, of 4 mm, 5 mm, 5.5 mm, 6 mm, or 7 mm. The second perforation line (42) has a length of 15 mm to 50 mm, preferably from 20 mm to 45 mm, more preferably from 28 mm to 38 mm. Non-limiting examples of this length are 30 mm, 33 mm, 33.8 mm, and 36 mm. Length is measured along the second perforation line (42). For example, if the second perforation line (42) is arced, then the length is measured along the arc. In the non-limiting example illustrated in FIG. 2, there is a total of seven perforations (i.e., first, second, (21, 22) are each 3.8 mm; and additional perforations (70A-70E)) are each 3 mm in length).

Angles are formed at the first and second intersections (31, 32). A first alpha angle (51) is formed in the flap (5) between the first ½ cut line of weakness (11) and the first perforation (21), and is from 120 degrees to 200 degrees, preferably from 140 degrees to 180 degrees, more preferably from 150 degrees to 175 degrees. Similarly, and a second alpha angle (52) is preferably formed in the flap (5) between the second ½ cut line of weakness (12) and the second perforation (22), and is from 140 degrees to 190 degrees, preferably from 150 degrees to 180 degrees, more preferably from 160 degrees to 175 degrees. Preferably the first and second alpha angles (51, 52) are the same. In non-limiting example, the first alpha angle (51) and second alpha angle (52) are each 150, 160, 170, 180, or 190 degrees, preferably 170 degrees.

A first beta angle (61) is formed between the first ½ cut line of weakness (11) and the third perforation (33), and is from 110 degrees to 170 degrees, preferably 120 degrees to 160 degrees, more preferably 130 degrees to 150 degrees. Similarly, a second beta angle (62) is preferably formed between the second ½ cut line of weakness (12) and the fourth perforation (44), and is from 110 degrees to 170 degrees, preferably 120 degrees to 160 degrees, more preferably 130 degrees to 150 degree. Preferably the first and second beta angles (61, 62) are the same. In non-limiting example, the first beta angle (61) and second beta angle (62) are each 120, 130, 140, 150, or 160 degrees, preferably 140 degrees.

A first theta angle (71) is formed between the first perforation (21) and the third perforation (33), and is from 10 degrees to 70 degrees, preferably from 20 degrees to 60 degrees, more preferably from 30 degrees to 50 degrees. Similarly, a second theta angle (72) is preferably formed between the second perforation (22) and the fourth perforation (44), and is from 10 degrees to 70 degrees, preferably from 20 degrees to 60 degrees, more preferably from 30 to 50 degrees. Preferably the first and second theta angles (71, 72) are the same. In a non-limiting example, the first theta angle (71) and second theta angle (72) are each 30, 40, 50, 60, or 70 degrees, preferably 50 degrees.

The sum of first alpha angle (51), first beta angle (61), and first theta angle (71) is equal to 360 degrees. If present, the sum second alpha angle (51), second beta angle (61), and second theta angle (71) is also equal to 360 degrees. Preferably the finger tab (3) has bilateral symmetry (in a plane orthogonal and a midpoint to the longitudinal axis (10)).

A body (2) of the finger tab (3) can be defined by the portion circumscribed between the first and second points of intersection (31, 32) and the first and second perforation lines (41, 42). As such, the body (2) preferably has an area from 60 mm2 to 210 mm2, preferably from 90 mm2 to 180 mm2, more preferably from 110 mm2 to 160 mm2. Non-limiting examples of area of the body (2) of the finger tab (3) include 110 mm2, 120 mm2, 130 mm2, 140 mm2, 150 mm2, or 160 mm2.

EXAMPLES

User data (via consumer testing) comparing the inventive carton and that of comparative examples is summarized. Stacking transportation tests for the inventive carton are also summarized. The carton comprising the finger tab of FIGS. 1 and 2 is an example of the present invention. The inventive carton is compared to comparative examples (A-G) of FIGS. 4-9. The dimensions of the carton (229 mm×55 mm×44 mm), type of paperboard (i.e., 350 g/m2) of virgin material, and ½ cut line of weakness (opposing blades 5 mm apart) defining the flap, are the same for each of cartons (i.e., inventive and comparative), except for the finger tab.

The finger tab (3) of the invention of FIG. 2 comprises a first intersection (31) formed by a first ½ cut line of weakness (11) intersecting a first perforation (21) wherein the perforation is 3.8 mm long and the linkage immediately adjacent the (7A) the first perforation (21) is 1 mm in length. A second intersection (32) is formed by a second ½ cut line of weakness (12) intersection a second perforation (22) that is 3.8 mm in length. A linkage (7F) immediately adjacent the second perforation (22) is 1 mm in length. A first (linear) perforation line (41) is in-between said first and second intersections (31, 32). The first perforation line (41) has an additional five perforations (70A-70E) each about 3 mm in length; and the linear perforation line (41) has a total of six linkages (7A-7F) each about 1 mm in length. The inventive finger tab (3) of FIG. 2 also has a second (arcing) perforation line (42) with the third perforation line (33) and the fourth perforation line (44) intersecting the first intersection (31) and the second intersection (32), respectively.

A stacking test and transportation tests (two types) are conducted on this inventive carton and the finger tab remained intact despite the compression and other stresses associated with these tests. One transportation test is directed to mass production. Multiple cases of cartons (e.g., for a retail customer) are stacked into a trucking container and then trucked from one location to another, and then the cartons are inspected for premature opening. Another transportation test is an ISTA ecommerce test. Results from these tests indicate the inventive cartons did not prematurely open.

FIG. 3 is a comparative finger tab (103) A. A first intersection (131) is formed by a first ½ cut line of weakness (111) intersecting a scoring line (141). Notably, there are neither perforations nor linkages in the scoring line (142). A scoring line is made by thin metal edge (but not a cutting knife) pressing on the paperboard so a compressed crease is formed to facilitate folding/pending. A second intersection (132) is formed by a second ½ cut line of weakness (112) intersecting said scoring line (141). The scoring line (141) is in-between said first and second intersections (131, 132). The finger tab (103) of example A herein also has an (arcing) perforation line (142) with the third perforation line (133) and the fourth perforation line (144) intersecting the first intersection (131) and the second intersection (132), respectively. This perforation line (142) of example A is analogous to the second perforation line (43) of the inventive example. The perforation line (142) has a total of six perforation (133, 190A-190D, 144) each 4.8 mm in length (measured along the arc) and a total of five linkages (109A-109E) in-between each 1 mm in length (measured along the arc). Results indicate that users (through consumer testing) are not able to easily push into the finger tab to open the flap. The scoring line provides too great of a barrier for users. Accordingly, the comparative example A of FIG. 3 demonstrates the importance of having a first perforation line and a first perforation of at least 1 mm length.

FIG. 4 is another comparative finger tab (203) B. The first and second ½ cut lines of weakness (211, 212) are analogous to those of the invention (of FIG. 2). However, notably there is neither a first intersection nor a second intersection. The first perforation line (241) is essentially a single perforation in the middle ⅓ of first perforation line (241) and linkages (207A, 207B) on either end of the first perforation line (241). The second perforation line (242) of this comparative example B is analogous to the second perforation line of the inventive finger tab of the invention except that the third and fourth perforations (233, 244) do not intersect what would otherwise be the first and second intersections. Results indicate that users (through consumer testing) are not able to easily push into the finger tab to open the flap. Accordingly, the comparative example B of FIG. 4 demonstrates the importance of having a first (and second) intersection(s). And the linkages (207A, 207B) of the first perforation line (241) are likely a further barrier to the ease of opening.

FIG. 5 is another comparative finger tab (303) C. Example C is analogous to previous example B, but the dimensions of the linkages (309A-309E) and perforations (333, 390A-390D, 344) of the second perforation line (342) are different. The first and second ½ cut lines of weakness (311, 312) are analogous to those of the invention (of FIG. 2). However, notably there is neither a first intersection nor a second intersection. The first perforation line (341) is essentially a single perforation in the middle ⅓ of first perforation line (341) and a linkage (307A, 307B) on either side of the first perforation line (341). The second perforation line (341) has a total of six perforations (333, 390A-390D, 344) each about 4 mm in length (measured along the arc) and a total of five linkages (309A-309E) in-between these perforations each of about 2 mm in length (vs. 1 mm comparatively to example B). Results indicate that users (through consumer testing) are not able to easily push into the finger tab to open the flap. Accordingly, the comparative example B of FIG. 4 demonstrates the importance of having a first (and second) intersection(s). And the linkages (207A, 207B) are likely a further barrier to the ease of opening. The greater distance of the linkages in the second perforation line provides yet an additional greater barrier (as compared to example B above).

FIG. 6 is another comparative finger tab (403) D. Example D neither has a first intersection nor a second intersection. The first (linear) perforation line (441) and the second (arced) perforation line (442) fail to intersect with each other and fail to intersect with the respective ½ cut lines of weakness (411, 412). There is about a 1 mm gap on either end of the first perforation line (441) to otherwise intersecting either respective end of the second perforation line (442). Furthermore, the first and second ½ cut lines of weakness (411, 412) are also each have about 1 mm gap to otherwise intersect either respective end of the second perforation line (442). The first perforation line (441) has a total of six perforations (421, 470A-470D, 422) each of about 2.8 mm in length, and a total of five linkages (407A-407E) in-between each about 2 mm in length. The second (arced) perforation line (442) has a total five perforations (433, 490A-490C, 444) each about 5.2 mm in length (along the arc), and a total of four linkages (409A-409D) in-between, each about 2 mm in length (along the arc). Results indicate that users (through consumer testing) are not able to easily push into the finger tab to open the flap. Accordingly, the comparative example D of FIG. 6 demonstrates the importance of having a first (and second) intersection(s). Furthermore, the linkage distance of the first perforation line is comparatively longer at 2 mm which may provide an additional barrier to ease of opening. Yet still further, the linkage distance of the second perforation is also comparatively longer at 2 mm which may also provide a further barrier to easy of opening.

FIG. 7 is another comparative finger tab (503) E. Example E neither has a first intersection nor a second intersection. The first (linear) perforation line (541) fails to intersect the second (arced) perforation line (542). There is about a 1 mm gap on either end of the first perforation line (541) to otherwise intersecting either respective end of the second perforation line (542). Furthermore, the first and second ½ cut lines of weakness (511, 512) are also each have about 1 mm gap to otherwise intersect either respective end of the second perforation line (542). The first perforation line (541) has a total of six perforation (521, 570A-570D, 522) each of about 2.8 mm in length, and a total of five linkages (507A-507E) in-between each 2 mm in length. The second (arced) perforation line (542) has a total six perforations (533, 590A-590D, 544) each of about 4.8 mm in length (along the arc), and a total of five linkages (509A-509E) in-between, each 1 mm in length (along the arc). Results indicate that users (through consumer testing) are not able to easily push into the finger tab to open the flap. Accordingly, the comparative example E of FIG. 7 demonstrates the importance of having a first (and second) intersection(s). Furthermore, the linkage distance of the first perforation line is comparatively longer at 2 mm which may provide an additional barrier for ease of opening.

FIG. 8 is another comparative finger tab (603) F. Example F neither has a first intersection nor a second intersection. The first (linear) perforation line (641) fails to intersection the second (arced) perforation line (642). There is about a 1 mm gap on either end of the first perforation line (641) to otherwise intersecting either respective end of the second perforation line (642). Furthermore, the first and second ½ cut lines of weakness (611, 612) are also each have about 1 mm gap to otherwise intersect either respective end of the second perforation line (642). The first perforation line (641) has a total of six perforations (621, 670A-670D, 622) each of about 2.8 mm in length, and a total of five linkages (607A-607E) in-between each 2 mm in length. The second (arced) perforation line (642) has a total six perforations (633, 690A-690D, 644) each of about 4 mm in length (along the arc), and a total of five linkages (609A-609E) in-between, each 2 mm in length (along the arc). Results indicate that users (through consumer testing) are not able to easily push into the finger tab to open the flap. Accordingly, the comparative example F of FIG. 8 demonstrates the importance of having a first (and second) intersection(s). Furthermore, the linkage distance of the first perforation line is comparatively longer at 2 mm which may provide an additional barrier for ease of opening. Yet still further, the linkage distance of the second perforation is also comparative longer at 2 mm which may also provide further barrier to easy of opening.

FIG. 9 is another comparative finger tab (703) G. Example G neither has a first intersection nor a second intersection. The first (linear) perforation line (741) fails to intersection the second (arced) perforation line (742). There is about a 0.8 mm gap on either end of the first perforation line (741) to otherwise intersecting either respective end of the second perforation line (742). Furthermore, the first and second ½ cut lines of weakness (711, 712) are also each have about 1 mm gap to otherwise intersect either respective end of the second perforation line (742). The first perforation line (741) has a total of seven perforations (721, 770A-770E, 722) each 3 mm in length, and a total of six linkages (707A-707F) in-between each 1 mm in length. The second (arced) perforation line (742) has a total six perforations (733, 790A-790D, 744) each about 4.8 mm in length (along the arc), and a total of five linkages (709A-709E) in-between, each 1 mm in length (along the arc). Results indicate that users (through consumer testing) are not able to easily push into the finger tab to open the flap. Accordingly, the comparative example G of FIG. 9 demonstrates the importance of having a first (and second) intersection(s).

In summary, inventive example of FIG. 2 demonstrates easy of opening (as compared to comparative examples A-G) but also does not prematurely open during typical shipping and handling conditions.

The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm.”

Every document cited herein, including any cross referenced or related patent or application and any patent application or patent to which this application claims priority or benefit thereof, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests or discloses any such invention. Further, to the extent that any meaning or definition of a term in this document 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 document shall govern.

While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

1. A carton (1) comprising a finger tab (3) for initiating the opening of a flap (5), wherein the finger tab (3) comprises a first intersection (31), wherein the first intersection is formed by a first ½ cut line of weakness (11) intersecting a first perforation (21), wherein the first perforation is at least 1 mm in length.

2. The carton (1) of claim 1, further comprising an opposing second ½ cut line of weakness (12) intersecting a second perforation (22) to form a second intersection (32), and at least one linkage (7A) in-between said first and second perforations (21, 22) to form a first perforation line (41);

preferably the length of the first perforation (21) is from 2 mm to 7 mm, preferably greater than 2 mm to 5 mm, more preferably from 2.5 mm to 4.5 mm;

more preferably the length of the second perforation (32) is at least 2 mm, preferably from 2 mm to 7 mm, more preferably greater than 2 mm to 5 mm, yet more preferably from 2.5 mm to 4.5 mm;

yet more preferably the length of the least one linkage (7A) is from 0.1 mm to 3 mm, preferably from 0.3 mm to 2 mm, more preferably from 0.5 mm to 1.5 mm, yet more preferably from 0.7 mm to 1.3 mm;

yet still more preferably the carton is a paperboard carton (1).

3. The carton (1) of claim 1 or 2, further comprising a third perforation (33) intersecting at the first intersection (31);

preferably a fourth perforation (44) intersecting at the second intersection (32);

more preferably at least a second linkage (9A) in-between the third and fourth perforations (33, 44, respectively) to form a second perforation line (42); and

even more preferably wherein the first perforation line (41) is proximate the flap (5) while the second perforation line (42) is distal the flap (5).

4. The carton (1) of any one of the preceding claims, wherein a first alpha angle (51) is formed in the flap (5) between the first ½ cut line of weakness (11) and the first perforation (21), and is from 120 degrees to 200 degrees, preferably from 140 degrees to 180 degrees, more preferably from 150 degrees to 175 degrees; and

preferably a second alpha angle (52) is formed in the flap (5) between the second ½ cut line of weakness (12) and the second perforation (22), and is from 140 degrees to 190 degrees, preferably from 150 degrees to 180 degrees, more preferably from 160 degrees to 175 degrees.

5. The carton (1) of any one of claims 3-4, wherein a first beta angle (61) is formed between the first ½ cut line of weakness (11) and the third perforation (33), and is from 110 degrees to 170 degrees, preferably 120 degrees to 160 degrees, more preferably 130 degrees to 150 degrees; and

preferably a second beta angle (62) is formed between the second ½ cut line of weakness (12) and the fourth perforation (44), and is from 110 degrees to 170 degrees, preferably 120 degrees to 160 degrees, more preferably 130 degrees to 150 degree.

6. The carton (1) of any one of claims 3-5, wherein a first theta angle (71) is formed between the first perforation (21) and the third perforation (33), and is from 10 degrees to 70 degrees, preferably from 20 degrees to 60 degrees, more preferably from 30 to 50 degrees;

preferably a second theta angle (72) is formed between the second perforation (22) and the fourth perforation (44), and is from 10 degrees to 70 degrees, preferably from 20 degrees to 60 degrees, more preferably from 30 degrees to 50 degrees.

7. The carton (1) of any one of the preceding claims, wherein the linear distance between the first intersection (31) and the second intersection (32) is from 10 mm to 70 mm, preferably from 20 mm to 50 mm, more preferably from 24 mm to 34 mm;

preferably wherein the first perforation line (41) between the first and second intersections (31, 32) is substantially linear, preferably linear.

8. The carton (1) of any one of the preceding claims, wherein the first perforation line (41) further comprises a plurality of additional linkages (7B-7F), preferably from 2 to 18 additional linkages, more preferably from 3 to 9 additional linkages;

preferably wherein each of the plurality of additional linkages are independently from 0.1 mm to 3 mm, preferably from 0.3 mm to 2 mm, more preferably from 0.5 mm to 1.5 mm in length.

9. The carton (1) of any one of the preceding claims, wherein the first perforation line further comprises a plurality of additional perforations (70A-70E), preferably from 2 to 16 additional perforations, more preferably from 3 to 8 additional perforations;

preferably wherein each of the plurality of additional perforations are independently from 0.5 mm to 6 mm, preferably from 1 mm to 5 mm, more preferably 2 mm to 4 mm in length.

10. The carton (1) of any one of the preceding claims, wherein the second perforation line (42) is nonlinear, preferably arced, more preferably a regular arc, yet more preferably the regular arc having a radius from 10 mm to 30 mm, preferably from 12 mm to 24 mm, more preferably from 15 mm to 21 mm.

11. The carton (1) of any one of the preceding claims, wherein the second perforation line (42) has a length of 15 mm to 50 mm, preferably from 20 mm to 45 mm, more preferably from 28 mm to 38 mm.

12. The carton (1) of any one of the preceding claims, wherein the second perforation line (42) further comprises a plurality of additional linkages (9B-9E), preferably from 2 to 12 additional linkages, more preferably from 3 to 5 additional linkages;

preferably wherein each of the plurality of additional linkages are independently from 0.1 mm to 6 mm, preferably from 0.2 mm to 2 mm, more preferably from 0.5 mm to 1.5 mm in length.

13. The carton (1) of any one of the preceding claims, wherein the second perforation line (42) further comprises a plurality of perforations (90A-90D), preferably from 2 to 12 additional perforations, more preferably from 3 to 5 additional perforation;

preferably wherein each of the plurality of additional perforations are independently from 4 mm to 7 mm, preferably from 4.5 mm to 6.5 mm, more preferably 5 mm to 6 mm in length.

14. The carton (1) of any one of the preceding claims, wherein the area of a body (2) the finger tab (3) is from 60 mm2 to 210 mm2, preferably from 90 mm2 to 180 mm2, more preferably from 110 mm2 to 160 mm2; wherein the body (2) of the finger tab (3) is defined by the portion circumscribed between the first and second points of intersection (31, 32) and the first and second perforation lines (41, 42).

15. The carton (1) of any one of the preceding claims, wherein:

at least the flap (5) is made from paperboard, preferably the carton is made from paperboard, preferably the paperboard has a density from 50 g/m2 to 700 g/m2, more preferably from 100 g/m2 to 600 g/m2, yet more preferably from 200 g/m2 to 500 g/m2, yet still more preferably from 300 g/m2 to 400 g/m2;

preferably the carton (1) is a six-sided rectangular carton (1) having the following dimensions: length of the carton (1) is from 10 cm to 40 cm, preferably 18 cm to 30 cm; preferably width of the carton (1) is from 3 cm to 9 cm, preferably 4 cm to 8 cm; and more preferably height of the carton (1) is from 2 cm to 8 cm, preferably from 3 cm to 7 cm;

more preferably wherein the six-sided rectangular carton (1) containing an interior volume, when devoid of contents, is from 300 cm3 to 900 cm3, preferably from 400 cm3 to 800 cm3;

yet more preferably wherein the length of the first and second ½ cut line of weakness (11, 12) are each independently at least 1 cm, preferably at least 2 cm, more preferably at least 3 cm, as measured from each respective first and second intersection point (31, 32)

yet still more preferably wherein said six-sided rectangular carton (1) contains an oral care product in the interior volume, preferably wherein the oral care product comprises a tube of toothpaste;

yet still even more preferably wherein the openable flap (5) of the carton (1) is formed as at least a portion of a front side (4) and adjoining a top side (2) of the carton (1), and wherein said single long side location of the finger tab (3) is the front side (4); and

yet still more preferably the body (2) of the finger tab (3) is located on the front side (4) of the carton, preferably located in the in the middle ⅓ of the front side (4) in both the length and width dimension.