KR20240160604A - Tamper Evident Indicator for Product Case - Google Patents

Abstract

A tamper-evident indicator for a product case, comprising: a product case made of a packaging material; at least a first longitudinally shaped tear area comprising a structure embossed in the packaging material, wherein the at least first longitudinally shaped tear area is located on a surface of the product case and defines a boundary of a lid area of the product case surface; and an opening strip made of a foil material, wherein the opening strip is attached to substantially the entire lid area of the packaging material, covers and seals at least the first longitudinally shaped tear area, creates a tear in the packaging material corresponding to the at least first longitudinally shaped tear area of the product case, and, as a result of pulling the opening strip from the product case, removes the packaging material in the lid area from the product case.

Description

Tamper Evident Indicator for Product Case

The present invention relates to the field of packaging, and more particularly to a product case including a tear region having an embossed structure enabling a tamper evident indicator. In a preferred embodiment, the tamper evident indicator may generate an audible signal upon first opening of the product case.

In the packaging industry, there is a need to assure the consumer that the packaged product has not been tampered with before the consumer first unpacks it. This need extends to packaging for all types of products, including food products such as chocolate, caviar, nuts, hardware products such as jewelry, electronic products, spare parts for the automotive industry, and smoking products such as cigarettes and cigars.

As an example from the tobacco industry, international publication WO 2021/122559 A1 discloses a packaging for a smoking article comprising a packaging body and a lid attached to the packaging body via a first attachment section. The lid is further attached to the packaging body by a second attachment section, the second attachment section comprising an inner surface and an outer surface opposite the inner surface. The second attachment section is breakable and comprises at least a first and a second break line, wherein one break line extends from the inner surface towards the outer surface without reaching the outer surface, and another break line extends from the outer surface towards the inner surface without reaching the inner surface. The second attachment section has a predetermined width from the inner surface to the outer surface, and the first and second break lines and/or the cut line both extend by at least 50% of said width. The second attachment section may be a means for enabling a tamper evident indication, thereby eliminating the need for an outer overlapping material.

The present invention aims to solve the conventional problems by providing an alternative to the tamper evident indicating means known in the prior art.

In addition, the present invention aims to provide a tamper-evident indication means capable of conveying a characteristic and determined sensory experience to a consumer upon first opening of a packaged product protected by the tamper-evident indication means.

One aspect of the present invention provides a tamper-evidence device for a product case, comprising: a product case made of a packaging material; at least a first longitudinally shaped tearing zone comprising a structure embossed in the packaging material, wherein the at least first longitudinally shaped tearing zone is located on a surface of the product case and defines a boundary of a lid area of the product case surface; and a release strip made of a foil material, wherein the release strip is attached to substantially the entire lid area of the packaging material, covers and seals the at least first longitudinally shaped tearing zone, creates a tear in the packaging material corresponding to the at least first longitudinally shaped tearing zone of the product case, and, as a result of pulling the release strip away from the product case, removes the packaging material in the lid area from the product case.

In a preferred embodiment, the tamper evident indicator further comprises a second elongated tear region parallel to the first elongated tear region, the lid region being bounded by the first and second elongated tear regions and a border of the packaging material.

In a further preferred embodiment, the open strip is additionally attached to one or more elongated tear regions.

In a further preferred embodiment, the open strip comprises a border region extending over a border region of the packaging material separated from the lid region by an elongated tear region beyond one or more elongated tear regions and removably attached to the border region by a re-sealable adhering system.

In a further preferred embodiment, the product case is contained in a product box, the product box including a hinged lid that covers the lid area when closed, and the opening strip is attached to one of the rims of the hinged lid and is pulled away from the product case when the hinged lid is opened.

In a further preferred embodiment, the tamper evident indicator further comprises an adhesive that adheres the tamper evident strip to the packaging material.

In a further preferred embodiment, the embossed structures are arranged in sequence in one or more grooves extending in the longitudinal direction of the elongated tear region, the grooves having a depth of at least half the thickness of the packaging material.

In a further preferred embodiment, the embossed structure is a shape that protrudes from the packaging material in a direction away from the open strip.

In a further preferred embodiment, the embossed structure is an opening through the packaging material.

In a further preferred embodiment, the embossed structure is positioned at least partially in the tear area and aligned with a period in the range of 0.5 mm to 5 mm, so that when the open strip is pulled from the product case, an audible sound of a predetermined frequency is produced.

In a further preferred embodiment, the opening strip further comprises a gripping element for grasping the opening strip and pulling it away from the product case.

The present invention will be better understood by reference to the detailed description and drawings of preferred embodiments of the present invention.

Figures 1a to 1c are perspective views including embodiments of a tamper evident indicator according to the present invention, wherein the open strip includes a boundary region extending beyond the tear region.
FIGS. 2a to 2d are perspective views including further embodiments of a tamper evident indicator according to the present invention, which includes two parallel elongated tear regions.
Figure 3 is a perspective view showing a cigarette box in a closed state.
FIG. 4 is a perspective view partially cut away showing a cigarette box having a tamper evident indicator according to an example of the present invention.
FIG. 5 is a perspective view showing a cigarette box including a specific embodiment of a tamper evident indicator according to the present invention, wherein an opening strip of an inner liner is attached to the lid of the cigarette box.
FIG. 6 is a perspective view showing a state of the tamper evident indicator shown in FIGS. 2A to 2D according to an exemplary embodiment of the present invention, wherein pulling the open strip produces an additional audible effect.
FIGS. 7A and 7B are perspective and enlarged cross-sectional views illustrating examples of an embossing tool used to create an embossing structure in a torn area according to one embodiment of the present invention.
FIGS. 8A to 8D are drawings showing examples of surface distributions of embossing structures for elongated torn areas according to exemplary embodiments of the present invention.
FIGS. 9a and 9b are schematic drawings illustrating embodiments of an open strip including an elongated tear region and linearly aligned embossed structures according to the present invention.
FIGS. 10A to 10C are schematic drawings illustrating additional exemplary embodiments of an open strip including an elongated tear region and a plurality of linearly aligned embossed structures according to the present invention.
FIGS. 11a and 11b are perspective views showing an example of an embossing device including two rollers, including an exploded view of a cassette assembly used to create an elongated tear region according to the present invention.
FIG. 12 is a perspective view and an enlarged cross-sectional view schematically illustrating a further example of packaging material for a product case being embossed to obtain an elongated tear region by a pair of embossing rollers.
The same reference numbers will be used throughout the drawings to refer to identical or similar features.

Figure 1a is a perspective view including an embodiment of a tamper evident indicator according to the present invention. In this example, a cigarette box (100) is used, but instead of adjusting its configuration appropriately to package the product under consideration, any other type of packaging may be considered, such as, for example, any one of the types described above in the Background Art chapter.

Here, the cigarette box (100) comprises a box lid (101) shown in an open position. The box lid (101) is rotated from a closed position (not shown in FIG. 1a) to an open position, or vice versa, by rotating around a folding member (102) indicated by an arrow in FIG. 1a, which is actuated on the rear surface of the cigarette box (100), not visible in FIG. 1a. The cigarette box (100) comprises a product case (103), e.g., an inner liner, which fits snugly into the interior of the cigarette box (100) to protect a product, in this case a plurality of tobacco products, such as cigarettes, not shown in FIG. 1a. The product case (103) may comprise packaging material. An opening strip (104) covers access to the product protected by the product case (103), i.e., the opening strip (104) is in the closed position. The opening strip (104) comprises a foil material that is flexible so as to conform to at least a portion of the shape of the product case (103), in this particular case from the upper surface (107) to the front surface (106) of the product case (103). The opening strip (104) may comprise an optional gripping element (105) that allows the opening strip (104) to be grasped and pulled away from the product case (103) to access the product protected by the product case (103). Figure 1b shows an example of the opening strip (104) being in the open position as a result of pulling the opening strip (104) away from the product case (103). The product (108) protected by the product case (103) is accessible to a consumer (not shown in the drawing) in this configuration. A piece of packaging material (109) of the product case (103) is removed from a lid area (110) of the product case (103). A piece (109) is attached to the inside of the opening strip (104). The piece of packaging material (109) is torn from the product case (103) along an elongated tear area (111) that is positioned on the surface of the product case (103) and defines a boundary of a lid area (110) on the surface of the product case (103). The piece of packaging material (109) may include a portion (112) of the elongated tear area (111). The elongated tear area (111) includes a structure embossed in the packaging material, which is not shown in FIG. 1b for better readability, but will be described and mentioned in the following description and drawings. At this point, it can be said that an irreversible tear is applied to the elongated tear area (111) at the time of opening the opening strip (104). If it is not torn, i.e. before opening the opening strip (104), it constitutes evidence of non-tampering together with the product case (103).

Figure 1c further illustrates the upper portion of the cigarette box (100) having the product case (103) and the opening strip (104). The drawing further illustrates an elongated tear region (111) shown in dashed lines to show that it is transparent through the opening strip (104). The elongated tear region (111) is a part of the product case (103) and may or may not be visible when this region is covered by the opening strip (104). However, the opening strip (104) covers the elongated tear region to seal it, i.e., make it impermeable when the opening strip (104) is in a closed position on the product case (103).

Fig. 2a is a perspective view including a further embodiment of a tamper evident indicator according to the present invention. The cigarette box (100) again comprises a product case (103), for example an inner liner. An elongated opening strip (200), made of foil material and having an optional grip element (201), extends from a surface of the product case (103) corresponding to the lid area of the product case (103). Since the lid area is covered by the elongated opening strip (200), it is not visible in Fig. 2a. The opening strip is attached to the packaging material of substantially the entire lid area. Fig. 2b shows a torn piece (203) of the lid area (202) in which the elongated opening strip (200) has already been partially pulled out of the product case (103). Also, similarly to Fig. 1b, a piece of packaging material (203) of the product case (103) is removed from the lid area (202) of the product case (103). A piece (203) is attached to the inside of the opening strip (200). The piece of packaging material (203) is positioned on the surface of the product case (103) and is torn from the product case (103) along an elongated tear area (204, 205) defining a boundary of a lid area (202) on the surface of the product case (103). The piece of packaging material (203) may include portions (206, 207) of the elongated tear areas (204, 205). The lid area (202) may extend to surround the entire perimeter of the product case (103), so that when the opening strip (200) is completely pulled away from the product case (103), an upper portion (208) of the packaging material is separated from the product case (103). The elongated tear regions (204, 205) can be substantially parallel to each other, and the lid region (202) is bounded by the elongated tear regions (204, 205) and the edge of the packaging material (not shown in FIGS. 2a and 2b).

Figure 2c shows the cigarette box (100) after the open strip (200) has been completely pulled out of the product case (103), with the upper portion (208) separated from the product case (103). This shows the product (108) inside the product case (103).

FIG. 2d is a perspective view further showing the upper portion of the cigarette box (100) having the product case (103) and the opening strip (200). The drawing further shows elongated tear areas (204, 205) which are shown in dashed lines to indicate that they are transparent through the opening strip (200). The elongated tear areas (204, 205) are part of the product case (103) and would normally be visible or invisible if the opening strip (200) covered them. However, the opening strip (200) covers the elongated tear areas (204, 205) to seal them, i.e. make them impermeable when the opening strip (200) is in a closed position on the product case (103). In a preferred embodiment, the opening strip (200) is further attached to the elongated tear areas (204, 205).

Figure 3 is a perspective view showing a cigarette box (100) with the box lid (101) in the closed position.

Fig. 4 is a perspective view showing the same cigarette box as Fig. 3, with parts of the box lid (101), parts of the opening strip (104), parts of the lid area (known as reference numeral 109 in Fig. 1b), or more precisely, parts of the packaging material piece (109) intentionally erased to show what is underneath, namely the product (108) protected by the product case (103). Fig. 4 additionally shows an elongated torn area (111).

FIG. 5 is a perspective view showing a further embodiment of a tamper evident indicator for a product case (103), which is similar to that shown in FIGS. 1a to 1c, except that when a border side (500) of the open strip (104) is secured to the box lid (101) and the box lid (101) is rotated from its closed position (as seen in FIG. 3) to its open position, the open strip (104) is pulled away from the product case (103). FIG. 5 also shows an optional border area (501) on the open strip (104), which extends over a border area of the packaging material separated from the lid area by the elongated tear area (111) beyond the elongated tear area (111) when the open strip (104) is in the closed position, and is configured to be releasably attached to the border area on the product case (103), i.e. by a resealable adhesive system, so as to preserve the freshness of the product (108) when the open strip (104) is in the closed position. These optional features can also be provided in the open strips illustrated in FIGS. 1a to 1c.

In a preferred embodiment, the tamper evident indicator may include an adhesive that adheres the tamper evident strip to the packaging material.

In a preferred embodiment, schematically illustrated in FIG. 6, when the open strip (200) is pulled, a predetermined sound can be generated as the tear region tears. This is achieved by spacing out the embossed structures along the elongated tear region so that when the open strip is pulled at a conventional speed (e.g., typically 0.1 m/s to 1.0 m/s), the packaging material is mechanically fractured between the embossed structures forming the elongated tear region, thereby generating low and mid-frequency (e.g., typically 50 Hz to 500 Hz) sounds. This is illustrated by the ear and sound plane symbols indicating the tear points in the product case (103).

Figures 7a and 7b are perspective and enlarged cross-sectional views illustrating an example of an embossing tool used to create an embossed structure in an elongated tear region according to one embodiment of the present invention. In this example, the embossing tool includes a pair of embossing rollers.

First, looking at FIG. 7A, this schematically illustrates an embossing device (700) including a first embossing tool (701) and a second embossing tool (702) for embossing a packaging material (703) from a product case (the product case itself is not shown in FIG. 7A, but is known by reference numeral 103 in the drawings previously discussed). As can be seen in the enlarged view, the first embossing tool (701) has at least a matrix-type embossing structure (704) extending from a first average surface (706) of the first embossing tool (701). The second embossing tool (702) includes a corresponding matrix-type embossing structure (705) recessed in a second average surface (707) of the second embossing tool (702). Embossing structures (704, 705) are illustrated when embossing an embossed structure (708) into a packaging material, and the embossed structure (708) is for an elongated tear area of a product case (not illustrated in FIG. 7a). Looking at FIG. 7a, it becomes clear that the packaging material is compressed to obtain the embossed structure (708). In the production process of the tear area, the embossing tool includes a plurality of embossing structures arranged to obtain an appropriate tear area (not illustrated in FIG. 7a).

Referring now to FIG. 7b, this schematically illustrates an embossing device (715) including a third embossing tool (709) and a fourth embossing tool (710) for embossing a packaging material (703) from a product case. The third embossing tool (709) has at least a pattern-type embossing structure (711) extending from a third average surface (712) of the third embossing tool (709). The fourth embossing tool (710) has a flat fourth average surface (713) of the fourth embossing tool (710). The embossing structure (711) and the fourth flat surface are illustrated when embossing the embossed structure (714) into the packaging material, wherein the embossed structure is for an elongated tear region of the product case (not illustrated in FIG. 7b). Inspection of FIG. 7b makes it clear that the packaging material is being compressed to obtain an embossed structure (714), which may result in penetration of the packaging material (703), i.e., opening of a hole through the packaging material (703). In the process of producing an elongated tear region, the embossing tool includes a plurality of embossing structures arranged to obtain an appropriate elongated tear region (not shown in FIG. 7b).

Figures 8a to 8d are drawings showing examples of surface distributions of embossed structures (800, 801) in a torn area. The torn area itself is not shown. It should be understood that the embossed structures are included in the packaging material of the product case in each case.

In FIG. 8a, the embossed structure (800) is represented by dots, but may have any individual geometric shape. The embossed structure (800) is distributed by parallel grid lines (g1, g2, g3, g4, g5) represented by dotted lines, which are periodically spaced apart from each other by a distance (p). The parallel grid lines (g1, g2, g3, g4, g5) are spaced apart from each other by a grid line distance (d). Each embossed structure (800) has a length (l) and a width (w) along its grid lines.

In Fig. 8b, the embossed structure (801) is distributed with additional parallel grid lines (j1, j2, j3, ??) indicated by dotted lines, which are periodically spaced apart from each other by a distance (p1). From one grid line to the next, for example, from line (j1) to line (j2), the embossed structure shifts by a distance (p1/2). The parallel grid lines (j1, j2, j3) are spaced apart from each other by a distance (d1) of the first grid line. Each embossed structure (801) has a length (l1) and a width (w1) corresponding to the distance (p1/2) along the grid line.

The embossed structure (800) in Fig. 8c is also distributed in parallel grid lines, not shown for better readability, which are periodically spaced apart from each other by a distance (p2). From one grid line to the next, the embossed structure is shifted by a distance (p2/2).

In Fig. 8d, the embossed structure (801) is also distributed with parallel grid lines, in which they are periodically separated from each other to form continuous straight lines. This example represents a specific case where the period (p) and the length are equal, so that the embossed structure forms continuous grooves of width (w). The lines (i.e., the embossing grooves) are separated from each other by a distance (d).

Figures 9a and 9b are schematic drawings showing exemplary embodiments of an open strip comprising an elongated tear region and an embossed structure aligned linearly. In this sense, Figure 9a shows a cigarette box (100) having an open strip (900) already partially pulled out of a product case (103). The enlarged view on the right side of the drawing is a plan view of the packaging material of the product case (103) along the cross-sectional line AA, more precisely showing a part of an elongated tear region (901, 902) in the product case (103) which defines the boundary of the lid area (909). Each elongated tear region (901, 902) comprises an embossed structure (903) aligned within the respective elongated tear region along a straight line (904, 905) indicated by a dashed line. The embossed structures (903) are each elliptical in shape with a length (l) and a width (w) and are periodically spaced apart by a periodic distance (p). The embossed structures are shifted from one elongated tear region to another by a distance (p/2 ) .

FIG. 9b illustrates a cross-section through the open strip (900) and the product case (103) in section A-A. It additionally illustrates a cross-section through the embossed structure (903) and the connection between the product case (103) and the open strip (900) formed by the adhesive (906). A void space (907) may occur between the product case (103) and the open strip (900) in a portion of the elongated tear region without the embossed structure. An optional sealing material (908) may be used to seal the product case (103) and the open strip (900) outside the lid region (909).

Figures 10a to 10c are schematic drawings showing exemplary embodiments of an open strip comprising an elongated tear region and embossed structures aligned linearly. In this sense, Figure 10a shows a cigarette box (100) having an open strip (1000) already partially pulled out of a product case (103). The enlarged view on the right side of the drawing is a plan view of the packaging material of the product case (103) including the cross-sectional line BB, more precisely, a part of an elongated tear region (1001, 1002) defining a border of a lid area (1009) in the product case (103). Each elongated tear region comprises an embossed structure (1003) aligned within the respective elongated tear region along a plurality of straight lines (1004, 1005) indicated by dotted lines. The embossed structures (1003) are each elliptical in shape with a length (l) and a width (w), and are periodically spaced from the grid lines by a periodic distance (p). In the tear region of each elongated shape, the embossed structures are shifted from one line to another by a distance (p/2 ) , while individual lines of the plurality of straight lines (1004, 1005) are separated by a distance (p/4).

FIG. 10b shows a cross-section through the open strip (1000) and the product case (103) along line B-B. It additionally shows a cross-section through the embossed structure (1003) and the connection between the product case (103) and the open strip (1000) formed by the adhesive (1006). A void space (1007) may occur between the product case (103) and the open strip (1000) in a portion of the elongated tear region without the embossed structure. An optional sealing material (1008) may be used to seal the product case (103) and the open strip (900) at the outside of the lid region (1009).

FIGS. 11A and 11B are perspective and exploded views, respectively, of an exemplary embossing device (1100) comprising first and second rollers (1101, 1102), wherein FIG. 11A depicts an assembled view, while the other view, namely 11B, depicts an exploded view of a cassette assembly (1103) used to emboss a structure into an elongated tear region in a packaging material of a product case (103) according to the present invention. The first roller (1101) is held in a bracket (1104) that allows the first roller (1101) to be individually removed from the cassette assembly (1103), while the second roller (1102) is held in its own bracket (1105) that also allows the second roller (1102) to be individually removed from the cassette assembly (1103).

Each of the first and second embossing rollers (1101, 1102) operates as an embossing tool, such as the embossing tool partially illustrated in FIGS. 7a and 7b, for example. Next, the product case (103) is embossed at a nip (1106) that is adjusted between the two rollers during embossing.

FIG. 12 is a perspective view and an enlarged cross-sectional view schematically illustrating a further example in which a packaging material, which may be a barrier paper, is embossed from a product case (103) by a pair of embossing rollers (1201, 1202) to obtain an elongated tear area (1200). The product case (103) is embossed at the nip (1203) between the rollers. The enlarged view at the upper left of the drawing shows an example of an embossing structure of the rollers, i.e. a matrix-type embossing structure (1204) on the second roller (1202) and a corresponding matrix-type embossing structure (1205) which results in an embossed structure positioned in an elongated tear area (1200) in the product case (103). The tear area is U-shaped in the product case (103) and is created in the embossing structure positioned on each roller of the corresponding embossing U-shaped structure (1206) indicated by the dashed line. The enlarged view at the lower left of the drawing schematically illustrates that the elongated tear region includes two lines (1207) of an embossed structure (1208) that are coincidentally oval in shape. The enlarged view at the upper right of the drawing shows that a predetermined structure can be embossed into the product case (103) outside the elongated tear region (1200), which is a desirable example for embossing packaging materials such as barrier paper without impairing their barrier function. This can result in, for example, a honeycomb-type topography (1209) such as that illustrated at the lower right of the drawing.

In the example of the embossed structures in the tear region of the longitudinal shape given above, the length, width, periodic distance between the embossed structures, the distance between the lines when several parallel grid lines are filled with the embossed structures, and the gap (p-l) between two consecutive embossed structures can be, for example, in the ranges shown in Table 1 below:

Parameters Measurement range Length ( l, l1) 0.5 to 5.0 mm width ( w, w1) 0.1 to 1.0 mm Period ( p) 0.5 to 5.0 mm Line length ( d) 0.1 to 1.0 mm Gap ( p - l) 0.05 to 0.5 mm

In a preferred embodiment, the packaging material is any one of the items in the following list, which list includes:

- A blocking paper sheet having a grammage of about 40 g/㎡ to 100 g/㎡ and a thickness of 50 ㎛ to 150 ㎛, - which

Comprising a paper-based packaging sheet material, preferably having on its surface at least a protective layer of another material (e.g., lacquer, varnish or water-based, solvent-based, vacuum-deposited or hot melt coating) to provide a barrier effect against moisture, oxygen, heat, odor, etc.;

- Paper sheets having a basis weight of 30 g/㎡ or more and 150 g/㎡ or less and a thickness of 40 ㎛ or more and 180 ㎛ or less;

- Metal foil having a thickness of 10㎛ or more and 80㎛ or less;

- A laminate containing paper and plastic film and having a basis weight of 20 to 90 g/㎡;

- Metallized paper or metallized plastic film having a basis weight of 30 or more and 100 g/㎡ or less, respectively; and

- Contains a metallized plastic film having a thickness of 6㎛ or more and 125㎛ or less.

The skilled person can use, for example, polyurethane resin-based adhesives disclosed in WO1992018577 or commercially available water-based acrylic emulsions for the adhesive (906 (as in FIG. 9B), 1006 (as in FIG. 10B)).

Alternatively, the skilled person can use, for the optional sealing material (as in FIG. 9b) and 1008 (as in FIG. 10b)), a generally low tack removable adhesive, for example a synthetic semi-pressure sensitive hotmelt adhesive such as PRIMAGRIP 38-638, or a waterborne polyethylene adhesive such as TOBACOLL ZD 4404-01, both available from Henkel & Cie AG.

Claims (10)

As a tamper-evidence indicator for product cases,
Product case manufactured from packaging material;
At least a first longitudinally shaped tearing zone comprising an embossed structure in the packaging material, - at least the first longitudinally shaped tearing zone is located on a surface of the product case and defines a boundary of a lid area of the surface of the product case; and
Comprising an open strip manufactured from foil material,
The above open strip is,
attached to substantially the entire lid area of the above packaging material,
Covering and sealing at least the first longitudinal tear area above,
generating a tear in said packaging material corresponding to said at least first longitudinal tear area of said product case, and as a result of pulling said opening strip from said product case, removing said packaging material in said lid area from said product case;
A tamper evident indicator further comprising a second elongated tear region parallel to the first elongated tear region, wherein the lid region is bounded by the first and second elongated tear regions and the edge of the packaging material. In the first paragraph, the tamper evident indicator is further attached to the one or more elongated tear areas. In the first aspect, the open strip includes a border region extending over a border region of the packaging material separated from the lid region by the elongated tear region beyond the one or more elongated tear regions, and a tamper-evident indicator removably attached to the border region by a re-sealable adhering system. In the first aspect, the product case is contained in a product box, the product box includes a hinged lid covering the lid area when closed, and the opening strip is a tamper-evident indicator attached to one of the edges of the hinged lid and pulled out from the product case when the hinged lid is opened. A tamper evident indicator according to any one of claims 1 to 4, further comprising an adhesive for adhering the open strip to the packaging material. A tamper evident indicator according to any one of claims 1 to 4, wherein the embossed structure is sequentially arranged in one or more grooves extending in the longitudinal direction of the elongated tear region, the grooves having a depth of at least half the thickness of the packaging material. A tamper evident indicator according to any one of claims 1 to 4, wherein the embossed structure is a shape that protrudes from the packaging material in a direction away from the open strip. A tamper evident indicator according to any one of claims 1 to 4, wherein the embossed structure is an opening penetrating the packaging material. A tamper evident indicator according to any one of claims 1 to 4, wherein the embossed structure is at least partially positioned in the tear area and aligned with a period in the range of 0.5 mm to 5 mm, such that when the open strip is pulled from the product case, the tamper evident indicator produces an audible sound of a predetermined frequency. A tamper evident indicator according to any one of claims 1 to 3, wherein the open strip further includes a grip element for holding the open strip and pulling it from the product case.