EP3822192A1 - Blister package with opening aid - Google Patents

Abstract

Blister pack (1) for a household product, comprising a blister hood (2) made of plastic and a rear wall (3) at least partially covered by the blister hood (2), the blister hood (2) having a product bulge (23) for accommodating the household product and a circumferential one Has sealing edge (20) with which the blister hood (2) is connected to the rear wall (3), characterized in that the blister hood (2) has a crease (21) through which a first area of the blister hood (2) with the Product bulge (23) is separated from a second area of the blister hood (2) in the form of an opening aid (22), which is delimited by the crease (21) and the sealing edge (20) and is located together with the part of the rear wall (3) , which the opening aid (22) covers, can be bent by kinking essentially along the kink (21) with respect to the first area and the part of the rear wall (3) covered by it, with the kink when the opening aid (22) is bent fold (21) exerts a pressure at a point on the rear wall (3) at which the rear wall (3) opens due to the pressure.

Description

The present invention relates to a blister pack for a household product, comprising a blister hood and a rear wall at least partially covered by the blister hood, in which the blister hood has a product bulge for receiving the household product and a circumferential sealing edge with which the blister hood is connected to the rear wall.

From the U.S. 3,472,368 A such a blister pack is known, which is opened at a predefined point. When the blister pack is opened, the plastic blister cover is torn open. However, a plastic blister cover cannot be opened as easily as a cardboard back wall, for example. In addition, when opening the plastic blister hood, sharp separating edges can arise, which pose a risk of injury to the user. The attractiveness of a product packaged in this way can be greatly reduced for the consumer and have a negative impact on purchasing behavior.

The US 7,243,798 B2 concerns another blister pack, in which the blister hood has, in addition to a product recess, a further recess with which the rear wall can be opened. The rear wall has a child safety device that is released by pressing the second recess. This then subsequently releases a sealing wall through which a product located in the product recess can be pressed. The structure of the packaging is not very intuitive and therefore unattractive for the consumer.

Known forms of blister packs often have the problem of poor user-friendliness. On the other hand, packaging that is too easy to open and intended to increase user-friendliness often carries the risk of inadvertently premature unsealing of the product during transport or on the shelf when the customer wants to take a closer look at the product. However, a blister pack that is unintentionally opened in this way is generally not for sale.

It is therefore the object of the present invention to provide a blister pack for a household product which can be opened easily and without problems, without the risk of it being opened unintentionally.

This object is achieved by the subject matter of the independent claim.

Advantageous refinements and developments are the subject matter of the subclaims, the accompanying description and the figures.

According to one aspect of the invention, a blister pack for a household product is provided which comprises a blister cover, preferably made of plastic, and a rear wall at least partially covered by this blister cover. The rear wall of the blister pack is advantageously rectangular and has a height of 10 to 25 cm and a width of 7 to 20 cm. The blister hood has a product bulge in which there is space for the product to be packaged and is connected to the rear wall along a circumferential sealing edge. The product is sealed in the packaging and protected from undesirable environmental influences. The blister hood also has a crease through which a first area of the blister hood, in which the product bulge is located, is separated from a second area, which forms an opening aid. The opening aid is limited by the crease and the sealing edge. Together with the part of the rear wall that it covers, it can be angled by kinking essentially along the crease in relation to the first area and the part of the rear wall covered by this. With this kinking of the opening aid, the kink exerts pressure at one point on the rear wall. At this point, the pressure opens the back wall. The advantage of this embodiment is that in this way an intervention is created through which the entire packaging can be easily opened and the product can be removed.

A household product that is packaged in the blister pack is preferably a pharmaceutical or cosmetic product or one that is used for household cleaning. The household product is particularly preferably a basket filled with cleaning agents and / or fragrances that is hung in the toilet.

According to a further exemplary embodiment, the rear wall has a predetermined breaking point below the kink. When the opening aid is bent over along the kink, the local pressure, starting from the kink, then acts directly on the predetermined breaking point. The rear wall, which is already weakened at this point by the predetermined breaking point, is easier to open as a result.

According to one embodiment, the predetermined breaking point can have a weakening line which, viewed in the longitudinal extension of the kink fold, has a congruent course to the kink fold at least in sections. The line of weakness can be designed such that, for example, the material of the rear wall is made thinner than that of the rest of the rear wall in the course of the line of weakness. This greatly facilitates kinking and tearing the packaging at this point. If the line of weakness is at least partially congruent with the line of the kink, the pressure produced by kinking the opening aid along the crease can act on the line of weakness in a targeted manner.

Furthermore, the line of weakness can have the congruent course to the crease over the entire course of the crease. This has the advantage that the The pressure exerted by the buckling process opens the rear wall over a greater length, which simplifies the further opening of the blister pack and the removal of the household product.

Furthermore, the line of weakness on the rear wall can comprise a line of perforations. A perforation can be easily implemented by machine and simplifies opening of the packaging. For example, the perforation line can be made in the rear wall by punching a slot or hole.

According to a further embodiment, the crease has a curvature. The advantage of a curvature of the kink in the longitudinal course is that with a kink designed in this way a higher pressure can be exerted on the rear wall at certain points than with a straight kink, which further increases the safety of use. If the product packaging is creased in the area of the crease, the crease runs along a straight line which, however, does not exactly correspond to the crease. The blister hood deforms in the area of the crease and a pressure is exerted on the rear wall at certain points which is higher than in the case of a crease running along the straight line.

The curvature should not be too small, since otherwise sufficient pressure cannot be exerted on the rear wall of the blister pack and a certain amount of deformation of the crease is necessary. However, the curvature should not be too strong, in order to avoid that too much force has to be exerted to buckle.

Furthermore, it can be provided that the curvature of the kink has a constant radius of curvature. The radius of curvature can be 5 and 20 cm. The kink then represents a segment of a circle. It can also be provided that a normal in a first end point of the curvature and a normal in a second end point of the curvature enclose an angle of values between 3 ° and 90 °, preferably between 15 ° and 45 ° or even between 25 ° and 35 °. If, for example, an exemplary embodiment is assumed in which the radius of curvature is constant and the included angle is 90 °, the crease has the shape of a quarter circle. Depending on the design of the blister pack, the crease can be adapted to its shape.

In a further exemplary embodiment, the crease has a cross section which varies over the course of the crease. For example, the pressure distribution can be controlled in that the kink has a changing height profile along its length. However, the cross section can also be constant over the entire course of the kink.

According to one exemplary embodiment, the cross section of the kink fold can be configured in a V-shape. This shape of the crease allows the opening aid to be easily bent and the pressure to be concentrated on the rear wall at the lowest point of the crease. In addition, the cross-section of the kink can also be configured, for example, in a U-shape. Depending on the desired pressure distribution, a suitable profile can be selected for the crease.

According to a further embodiment, the rear wall of the blister pack is made from cardboard. This material is well suited for introducing weakenings or perforations, by means of which the consumer can open the packaging without further aids. Cardboard is easy to print on, so all relevant product information can easily be attached to the back wall if cardboard is chosen as the material. In addition, cardboard is an economically efficient material that can increase the sustainability of packaging, for example by using recycled cardboard. In further embodiments, however, other materials can also be provided for the rear wall, for example aluminum foil or even plastic. The rear wall can also have several layers with different materials.

Furthermore, the blister cover can be produced by means of a thermoforming process. Other methods can also be used for the production of the blister cover.

It can also be provided that an indication of the opening of the blister pack is attached to the rear wall. The information is advantageously located in or near the area that is covered by the opening aid in order to point this out to the user directly and to support the intuitive way of opening. The user information can optionally be attached to the side facing or facing away from the blister hood. A message from both sides is also conceivable.

According to a further embodiment it can be provided that the blister cover extends at least in the edge region of the crease in a plane parallel to the rear wall, from which the cross section of the crease extends in the direction of the rear wall, so that a distance from a lower point of the cross section is smaller than the distance between the level of the blister hood in the edge area and the rear wall. This is easy to implement, especially in the case of a V-shaped configuration of the kink and serves to simplify the exertion of pressure on the rear wall.

According to a further exemplary embodiment, the line of weakness has a grip nose. When pressure is exerted on the line of weakness, the grip nose breaks open, as a result of which a protruding piece of the rear wall is released, which can then be used as an opening tab for easier opening of the rear wall.

Figur 1

ein Ausführungsbeispiel einer Sichtverpackung;

Figur 2

das Ausführungsbeispiel gemäß Figur 1 in perspektivischer Ansicht;

Figur 3

einen vergrößerten Ausschnitt des Ausführungsbeispiels gemäß Figur 1 und

Figur 4

ein weiteres Ausführungsbeispiel der Erfindung.

The invention is explained in more detail using the exemplary embodiments shown in the drawing. Show it:

Figure 1

an embodiment of a transparent packaging;

Figure 2

the embodiment according to Figure 1 in perspective view;

Figure 3

an enlarged section of the embodiment according to Figure 1 and

Figure 4

another embodiment of the invention.

Figure 1 shows an embodiment of a blister pack 1 with a blister hood 2 made of plastic and a rear wall 3 made of cardboard. The blister hood 2 is connected to the rear wall 3 along a circumferential sealing edge 20. A product to be packaged finds space in a product bulge 23 of the blister hood 2. The product bulge 23 is followed by an erection aid 24 with which the blister pack 1 can be erected for product presentation. Alternatively, the blister pack 1 can be suspended from a suspension eyelet 31. A kink 21 divides the blister hood 2 into two areas: a larger one with the product bulge 23 and a smaller one, which is designed as an opening aid 22. The opening aid 22, which is essentially triangular in this embodiment, is delimited on one side by the crease 21, on the other two by side lines of the sealing edge 20. The blister hood 2 has different distances from the rear wall 3 lying in a flat plane: the raised areas the product bulge 23 and the erection aid 24, next to it the sealing edge 20 directly adjacent to the rear wall 3 and on the rest of the surface a uniform distance from the rear wall 3 that is smaller than the product bulge 23. The blister hood 2 is the rear wall 3 only in the area of the fold 21 approximated even further. In this embodiment, the kink 21 is V-shaped in its cross-section (see also FIG Figure 2 ). The deepest point of the kink 21 is so closely approached to the rear wall 3 or can already be in contact with it that it directly exerts punctual pressure on the rear wall 3 during a kinking process. Along this in the Figure 1 The deepest point of the kink 21, designed as a line 210, the rear wall 3 is provided with a weakening line 30. In this exemplary embodiment, the line of weakness 30 extends as far as the side edges of the rear wall 3. This facilitates the bending process and further increases the user-friendliness. In this embodiment, both the blister cover 2 and the rear wall 3 are designed to be essentially rectangular, the blister cover 2 having rounded corners. However, both can also have other shapes. In addition, it is not absolutely necessary for the shape of the blister cover 2 to be essentially the same as that of the rear wall 3. For example, it is conceivable that the blister cover 2 is based on the shape of the packaging product oriented, while the rear wall 3 has a rectangular or round shape.

Figure 2 shows the embodiment of the blister pack 1 of FIG Figure 1 in perspective view. The V-shaped structure of the kink 21 becomes particularly clear here. At the lowest point of the kink fold 21, the tip of the V, during the kinking process such a great pressure is exerted on the weakening line 30 at points that it breaks and the blister pack 1 can be opened. The deepest point of the crease 21 is, apart from the sealing edge 20, the area of the blister cover 2 that is the least spaced from the rear wall 3. In this exemplary embodiment, the crease 21 also has a curvature. This curvature leads to a higher pressure development than bending along a straight line.

Figure 3 shows an enlarged and simplified section of the embodiment of FIG Figure 1 . The kink 21 shown here represents approximately a segment of a circle, at the end points P ₁ and P _{2 of which} a tangent T ₁ and a tangent T _{2 are} drawn. Emanating from the tangents at the end points P ₁ and P ₂ normal N ₁ and N ₂ intersect at an end point P ₃ and include an angle α a. The length of the normals N ₁ and N ₂ is approximately 9 to 12 cm in this exemplary embodiment, the normals N ₁ and N _{2 being} of the same length apart from an error <4%.

The angle α here is 35 °, and particularly good results can also be achieved if the angle is 30 to 40 °. The secant S, which connects the end points P ₁ and P _{2 of} the kink 21, represents here approximately and in simplified form the course of the theoretical kink. The material is deformed by the given course of the kink 21 and the corresponding deviation of the theoretical kink the blister hood and in particular at the lowest point of the kink 21, a high point pressure with a correspondingly large deformation path is exerted on the rear wall. The pressure on the rear wall 3 is highest when the opening aid 22 is bent upwards. This means that the opening aid 22 in the illustration of Figure 1 is bent upwards from the plane of the drawing in the direction of the viewer.

In Figure 4 a further exemplary embodiment of the blister pack 1 is shown, in which the weakening line 30 has a grip lug 300. The grip nose 300 is designed as a semicircular bulge of the line of weakness 30. During the bending process along the lowest point of the kink 21 designed as line 210, this shape leads to the grip lug 300 being detached from the rest of the rear wall 3 and protruding as an opening tab. The grip lug 300 can then be grasped to open the rest of the rear wall and additionally facilitates the opening process.

List of reference symbols

1

Blister packaging

2

Blister cover

20th

Seal edge

21

Crease

210

line

22nd

Opening aid

23

Product bulge

24

Setup aid

3

Back wall

30th

Line of weakness

300

Grip nose

31

Suspension eyelet

N

Normal

P

End point

S.

secant

T

tangent

α

angle

Claims (15)

Blister pack (1) for a household product, comprising a blister hood (2) made of plastic and a rear wall (3) at least partially covered by the blister hood (2), the blister hood (2) having a product bulge (23) for accommodating the household product and a circumferential one Has sealing edge (20) with which the blister hood (2) is connected to the rear wall (3), characterized in that the blister hood (2) has a crease (21) through which a first area of the blister hood (2) with the The product bulge (23) is separated from a second area of the blister hood (2) in the form of an opening aid (22) which is delimited by the crease (21) and the sealing edge (20) and is located together with the part of the rear wall (3) , which the opening aid (22) covers, can be bent by kinking essentially along the kink (21) with respect to the first area and the part of the rear wall (3) covered by it, with the kink when the opening aid (22) is bent fold (21) exerts a pressure at a point on the rear wall (3) at which the rear wall (3) opens due to the pressure. Blister pack (1) according to Claim 1, the rear wall (3) having a predetermined breaking point below the crease (21). Blister pack (1) according to claim 2, characterized in that the predetermined breaking point has a weakening line (30) which, viewed in the longitudinal extension of the kink fold (21), has a congruent course to the kink fold (21) at least in sections. Blister pack (1) according to Claim 3, characterized in that the line of weakness (30) has the congruent course to the crease (21) over the entire course of the crease (21). Blister pack (1) according to claim 3 or 4, wherein the line of weakness (30) comprises a line of perforations. Blister pack (1) according to one of Claims 1 to 5, characterized in that the crease (21) has a curvature. Blister pack (1) according to Claim 6, characterized in that the curvature of the crease (21) has a constant radius of curvature. Blister pack (1) according to Claim 6 or 7, characterized in that a normal in a first end point of the curvature and a normal in a second end point of the curvature enclose an angle which has values between 3 ° and 90 °. Blister pack (1) according to one of Claims 1 to 8, characterized in that the kink fold (21) has a cross section which is constant or varies over the course of the kink fold (21). Blister pack (1) according to Claim 9, characterized in that a cross section of the kink fold (21) is V-shaped. Blister pack (1) according to one of Claims 1 to 10, the rear wall (3) being made from cardboard. Blister pack (1) according to one of Claims 1 to 11, the blister hood (2) being produced by means of a thermoforming process. Blister pack (1) according to one of Claims 1 to 12, a user instruction for opening the blister pack (1) being attached to the rear wall (3). Blister pack (1) according to one of claims 1 to 13, characterized in that the blister hood (2) extends at least in the edge region of the kink fold (21) in a plane parallel to the rear wall (3) from which the cross section of the kink fold (21) extends ) extends in the direction of the rear wall (3), so that a distance from a lower point of the cross section is smaller than the distance between the plane of the blister hood (2) in the edge area and the rear wall (3). Blister pack (1) according to one of Claims 1 to 14, characterized in that the weakening line (30) has a grip nose (300).

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