DE102016203354A1 - Blister packaging with asymmetrical blister hood - Google Patents

Abstract

The invention relates to a blister pack (1) for a tablet (30), preferably for a washing or dishwashing tablet, the blister pack (1) for at least one tablet (30), preferably for a washing or dishwashing tablet, comprising a blister card (10). with a cover layer (13) and at least one blister hood (20) with a first side wall (22) and at least one second side wall (23), wherein the blister cap (20) and the cover layer (13) form a closed product chamber (21) for the tablet (30), wherein the cover layer (13) is designed to tear by a compressive force when the tablet (30) is pushed out of the product chamber (21) for removal and the pressure force from the blister cap (20) over the tablet (30) is directed onto the cover layer (13). The invention is characterized in that the blister cap (20) is formed asymmetrically, wherein the first side wall (22) and the second side wall (23) are inclined differently to the blister card (10).

Description

The invention relates to a blister pack comprising a blister card and at least one blister hood.

For example, from the EP 0 903 405 A2 Such a blister pack is known. The blister cap, together with a cover layer of the blister card, forms a closed product chamber for one tablet each. For the purpose of removal, the tablet can be pushed through the covering layer by means of a certain compressive force, which is usually applied by the thumb from above onto the blister cap. The blister cap is dented or deformed and the pressure force then loads on the tablet, which presses against the cover until it finally tears. The tablet can be removed through the resulting opening in the cover layer.

Blister packs are widely used for pharmaceutical tablets. These are comparatively small and often have a roundish or elliptical underside, so that the forces acting on the covering layer when pressing the tablet are rather pointy. The forces necessary for tearing open the covering layer for the removal of a pharmaceutical tablet can therefore be applied comparatively easily without any aids.

The removal of larger tablets, for example in the form of washing or dishwashing tablets from a blister pack, generally requires higher absolute forces due to the larger dimensions of the tablets. Also, such tablets often have a flat underside, which presses against the blister card or the cover layer of the blister card when pressing the tablet over the entire surface. Due to the larger contact surface higher forces are required to tear the cover layer. This can lead to a blister pack with relatively large detergent or detergent tablets can be opened only with great effort.

It should also be borne in mind that the tablet must absorb virtually all the force necessary for the tearing of the covering layer. So it must have a certain product strength, which can not be achieved by any product formulation of a washing or detergent tablet. There is thus the danger that the washing or dishwashing tablet will break if the forces are too high.

Although the pressure required for the removal of the tablet pressure can be reduced by the fact that the blister card or its cover layer is designed to be correspondingly weaker, so that it tears easier. But on the other hand, the blister card has to close the product chamber securely and sufficiently tight, so that the resulting material thickness of the blister card can not be made arbitrarily small.

The invention is therefore based on the object to provide a blister pack, in particular a blister pack for washing or dishwashing tablets, by which the tablets can be stored safely and tightly and which allows easy removal of the tablets.

The problem underlying the invention is solved by claim 1. Embodiments of the invention can be taken from the dependent claims of claim 1.

According to the invention, it is provided that the blister hood is formed asymmetrically, wherein a first side wall and a second side wall are inclined differently from the blister card. A difference between a first inclination angle of the first side wall and a second inclination angle of the second side wall may be greater than 2 °. In one embodiment of the invention, this difference is between 2 and 20 °. The difference between the first inclination angle and the second inclination angle is preferably 2 to 8 ° or 3 to 5 °, for example 4 ° (4 °).

If the first side wall extends perpendicular to the plane of the blister card, the associated first inclination angle should be 0 °. For example, if the first inclination angle is 4 °, the first side wall subtends an angle of 86 ° with the plane of the blister card.

The first side wall preferably extends straight from the plane of the blister card. The first side wall can also be curved. A straight line that intersects a foot of the first side wall and a head of the first side wall, for the calculation of the first inclination angle represents a leg, which includes the first inclination angle together with the normal of the plane of the blister card. The root of the first side wall lies in the plane of the blister card, while the top of the first side wall is spaced therefrom. The vertical distance between the foot point and the head point corresponds to the height of the first side wall.

The blister cap can take any shape in cross-section, ie in a sectional plane which is parallel to the blister card level. For example, the cross section may be circular, so that the blister cap has substantially the shape of a cylinder. The outer surface of the cylinder is made up of a large number of very small side walls, so that a cylindrically shaped blister cap has a plurality of side walls.

The first side wall and the second side wall may be opposite side walls of the blister hood. In one embodiment, the blister cap includes a third sidewall and a fourth sidewall. The blister cap preferably has a rectangular basic shape: the cross section of the blister cap is correspondingly rectangular. The rectangular cross section may have rounded corners.

A difference between a third inclination angle of the third side wall, a fourth inclination angle of the fourth side wall may be greater than 2 °. For example, the difference may be in a range between 2 and 20 °. A preferred range is from 2 to 8 ° or from 3 to 5 °.

In one embodiment of the invention, the first side wall and the third side wall have a common edge, wherein the first side wall and the third side wall are more inclined to the blister card plane than the second side wall and the fourth side wall. For example, each of the first inclination angle and the third inclination angle may be 4 to 8 degrees, while the second inclination angle and the fourth inclination angle may be 0 to 4 degrees, respectively. The shared edge may be a rounded edge or a fillet area. Preferably, the edge between the first sidewall and the third sidewall is more rounded than at least two of the remaining three edges of the square blister hood. Thus, with regard to the absorption of vertical forces, the area "first side wall, edge, third side wall" is further weakened, since the reinforcing or stiffening effect of sharp-edged material structures does not exist or is lower.

The side walls of the blister hood can extend up to a hood cover. Thus, the product chamber is bounded laterally by the side walls, up through the hood cover and down through the cover layer of the blister card. When using the terms "side, top, bottom, vertical, etc.", it is assumed that the blister card is horizontal and the blister covers extend vertically upward from the blister card. In a different orientation or location of the blister pack, these references change accordingly.

As a result of their different degrees of inclination, the kink resistance of the first side wall and the second side wall of the blister hood is different if, for the purpose of removing the tablet, a compressive force acts on the blister cap from above, ie in the vertical direction. The sidewall, which is more inclined to the vertical, will more likely buckle or fail than the sidewall, which is less inclined to the vertical. If the first side wall buckles while the second side wall has not yet buckled, a greater force acts on the side or edge of the tablet which faces the first side wall, since the buckled side wall can absorb practically no forces. This leads to an asymmetric loading of the tablet and thus also to an asymmetric loading of the covering layer, which lies below the tablet. The tablet does not press the entire surface against the cover layer, but at least approximately only with a lower edge or even with a lower corner against the cover layer. This results in stress peaks in the material of the cover layer, so that the cover layer tears faster compared to an equally distributed load without local peaks.

Preferably, the hood cover is substantially parallel to the plane of the blister card. The hood cover may have an elevation, a depression or a preferably profiled finger support surface. For example, the profiled finger rest surface may be provided near the common edge or joint between the first sidewall and the third sidewall, which are more inclined to the blister card plane than the second and fourth sidewalls. If pressure is now applied from above onto the hood cover by a finger or by the thumb, the blister hood gives way more easily in this (corner) area than at another location due to the greater inclination of the first side wall and the third side wall. This leads, as stated above, to an ideally selective loading of the covering layer, since the tablet located in the product chamber is no longer pressed over the entire surface and straight but obliquely tilted against the covering layer.

The cover layer may have a predetermined breaking point below the blister hood. By this predetermined breaking point, a simpler and / or controlled tearing of the covering layer can be promoted. Preferably, the predetermined breaking point is located in the vicinity of the first side wall, because in this area, the blister hood buckling of the tablet due to the stronger inclination of the side wall less resistance or easier kinking.

The first sidewall may have a material thickness that is less than the material thickness of the second sidewall. Thus, with regard to the ability to absorb vertical forces, the first side wall may be further weakened relative to the second side wall.

The comments on the first side wall in terms of their design (straight, curved, base, etc.) can also be transferred to the other side walls. It should be noted, however, that the side walls may differ not only in the angle of inclination, but also in terms of other features. For example, the first side wall may be straight and the second side wall may be curved.

The volume of the washing or dishwashing tablet may be 5 to 20 cm ³ , preferably 10 to 15 cm ³ . The weight may be 7.5 to 30 g, preferably 15 to 25 g. The tablet can have several components. Preferably, the tablet has a cuboid basic shape. Thus, a container is disclosed which comprises the blister pack according to the invention and at least one washing or rinsing agent tablet located therein.

Reference to the embodiments illustrated in the drawings, the invention is explained in detail. Show it:

1 schematically a blister pack from above;

2 schematically a blister hood from above ( 2a ) and in two sectional views ( 2 B and 2c );

3 schematically a blister hood before removing a tablet ( 3a ) and the blister hood when removing the tablet ( 3c );

4 various views of a first embodiment of the blister hood;

5 various views of a second embodiment of the blister hood; and

6 various views of a third embodiment of the blister hood.

1 schematically shows a blister pack, in its entirety with 1 is designated. The blister pack 1 has a substantially rectangular, flat blister card 10 and several, on the blister card 10 distributed blister hood 20 on. Overall, the blister pack includes 1 five blister hoods 20 which are arranged in two rows.

The flat blister card 10 has four rounded corners 11 on, with a rounding radius of each corner 11 here is the same size. The rounding radii of the individual corners 11 can also be different sizes. For example, the radius of curvature of two diagonally opposite corners may be significantly greater than the radius of curvature of the remaining two corners of the blister card 10 , The blister card 10 also has a handle opening 12 on to handling the blister pack 1 to simplify.

2 shows schematically different views of the blister hood 20 , Opposite the blister hood 20 in the embodiment of 1 has the blister hood 20 of the 2 no rounded corners on.

2a shows the blister hood 20 in the plan view, while the 2 B and 2c in each case longitudinal sections of the blister hood 20 represent. The longitudinal section of the 2 B corresponds to the section along the straight line bb in 2a , For this purpose, a section perpendicular to the line cc, which the longitudinal section in 2c equivalent.

The 2 B and 2c also show part of the blister card 10 , The blister card 10 has a cover layer 13 on, which is a product chamber 21 passing through the blister hood 20 is formed, closes. The blister hood 20 and a carrier part 14 the blister card 10 are designed as a one-piece component, which is preferably made of plastic. The blister hood 20 is preferably prepared by thermoforming such as deep drawing. The cover layer 13 is fixed to the carrier part 14 connected. For example, the cover layer 13 a cover made of aluminum, which is on the support part 14 is laminated.

The blister hood 20 has a first sidewall 22 on, which is essentially perpendicular to the blister card level 10 extends upwards. To the vertical (see the dashed lines 2), however, it has an inclination angle α. Opposite to the first side wall 22 has the blister hood 20 a second side wall 23 which is also inclined to the vertical (see lines 2). A second angle of inclination, ie the angle between the vertical and the second side wall, is denoted by β and recognizably smaller than the first angle of inclination α of the first side wall 22 , For example, the second inclination angle β may be 0 to 4 °, while the first inclination angle α may be 4 to 8 °. The inclination angles α, β are in the 2 B slightly exaggerated. In principle, however, they can also assume values significantly above 10 °.

The basic shape of the rectangular blister hood 20 also has a third sidewall 24 and a fourth sidewall 25 on. The third side wall 24 and the fourth sidewall 25 lie opposite each other and are each at right angles to the side walls 22 . 23 , How the particular 2c can be seen, are also the third side wall 24 and also the fourth sidewall 25 to Vertical inclined. A third angle of inclination (angle between the vertical and the third side wall 24 ) is denoted by γ, while a fourth tilt angle is denoted by δ. The third inclination angle γ should be at least 2 ° (2 degrees) greater than the fourth inclination angle δ.

The side walls 22 . 23 . 24 . 25 extend from the level of the blister card 10 up to one to the blister card 10 parallel trained hood cover 26 , with a circular, slightly raised finger rest area 27 is provided. The finger rest area 27 , which is arranged off-center, may have a profiled surface, so that a finger or thumb placed on her good grip. Over the finger support surface 27 can be a vertical compressive force F on the blister hood 20 Apply to one in the product chamber 21 tablet (in 2 not shown).

Out 3 The basic contexts of taking the tablet out in 3 represented by a hatched rectangle and with 30 is designated. 3a corresponds essentially to the longitudinal section of 2 B , wherein in the embodiment of the 3 the hood lid 26 no separate finger support surface 27 having. Now, from the top in the vertical direction down the pressure force F on the blister hood 20 applied, this compressive force F is distributed to the individual side walls 22 . 23 . 24 . 24 as well as on the tablet 30 , as the flat hood cover 26 can be easily dented inward and then a direct contact between hood cover 26 and tablet 30 consists.

Since the first inclination angle α of the sidewall 22 is greater than the second inclination angle β of the second side wall 23 , may be the first sidewall 22 absorb less vertical forces than the second sidewall 23 , As a result, the first sidewall bends 22 rather than the second side wall 23 , This causes the tablet 30 not uniform and full surface, but rather linear with a in the representation of 3b lower left edge 31 against the cover layer 13 is pressed. This leads to corresponding voltage peaks in the cover layer 13 so that it tears easier. Due to the differently inclined side walls 22 . 23 is targeted an asymmetric load on the tablet 30 caused. Overall, this leads to a smaller compressive force F, which is necessary for the cover layer 13 tears.

The through the differently inclined side walls 22 . 23 caused asymmetric loading of the tablet 30 also applies with regard to the opposite side walls 24 . 25 the blister hood 20 , Because the first side wall 22 and the third sidewall 24 opposite the other side walls 23 . 25 are more inclined, and there the first side wall 22 and the third sidewall 24 a common edge 28 have (see 2a ), kinks the blister hood 20 near this common edge 28 first, so that the tablet 30 not with the linear edge 31 but mainly with only one lower corner against the cover layer 13 suppressed. This one-point concentrated power between tablet 30 and cover layer 13 lets the cover tear down quickly. For this purpose, only a small pressure force F is necessary, from the top of the blister hood 20 acts.

The 4 shows various views of a concrete blister hood 20 , 4a shows the blister hood 20 from above, while the 4b and 4c Represent side views. 4d is a longitudinal section, which is essentially the longitudinal section of 2 B respectively. 3 equivalent. The 4g and 4f are perspective views of the blister hood 20 ,

The side walls 22 . 23 . 24 . 25 are each slightly inclined to the vertical, the corresponding inclination angles are again formed differently large. In contrast to the embodiments illustrated in the first figures, the embodiment of the 4 a centrally located survey 29 on, which has the shape of a dome. The side walls 22 . 24 are most inclined to the vertical. Because the edge 28 between the side walls 22 . 24 In addition, is strongly rounded, the stiffening or reinforcing effect of a sharp edge is kept low. Thus, the entire area of the blister hood 20 , the first and more inclined side wall 22 , the rounded edge 28 and the third and more inclined side wall 24 includes, designed weak in terms of recording vertical forces. This favors the intended asymmetric and punctual loading of the tablet 30 or the cover layer 13 , The circumstance that the diametrically opposite edge of the blister hood 20 is also more rounded than the other edges between the individual side walls, is not the asymmetry of the invention, but the design of the blister cover 20 owed.

Also in the 5 and 6 illustrated embodiments of the cuboid blister hood 20 have side walls inclined to the vertical 22 . 23 . 24 . 25 on. In the embodiment of 5 are two mutually diametrically arranged finger support surfaces 27 provided, one again in the area of the edge 28 lies at the two more inclined side walls 22 . 24 run into each other. The embodiment according to 6 on the other hand, has only one finger support surface 27 auf, which, similar to the embodiments of the 1 . 2 . 3 , is arranged off-center.

LIST OF REFERENCE NUMBERS

1

blister

2

Line (vertical)

10

blister

11

corner

12

grip opening

13

covering

14

support part

20

blister

21

product chamber

22

first sidewall

23

second side wall

24

third sidewall

25

fourth side wall

26

Haubeldeckel

27

Finger rest area

28

edge

29

survey

30

tablet

31

lower edge

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0903405 A2 [0002]

Claims (12)

Blister pack ( 1 ) for at least one tablet ( 30 ), preferably for a washing or dishwashing tablet, comprising a blister card ( 10 ) with a cover layer ( 13 ) and at least one blister hood ( 20 ) with a first side wall ( 22 ) and at least one second side wall ( 23 ), whereby the blister hood ( 20 ) and the cover layer ( 13 ) a closed product chamber ( 21 ) for the tablet ( 30 ), wherein the cover layer ( 13 ) is designed to tear through a compressive force when the tablet ( 30 ) for removal from the product chamber ( 21 ) and the pressure force from the blister hood ( 20 ) over the tablet ( 30 ) on the cover layer ( 13 ), characterized in that the blister hood ( 20 ) is formed asymmetrically, wherein the first side wall ( 22 ) and the second side wall ( 23 ) to the blister card level ( 10 ) are inclined differently. Blister pack ( 1 ) according to claim 1, characterized in that a difference between a first inclination angle of the first side wall ( 22 ) and a second angle of inclination of the second side wall ( 23 ) is greater than 2 degrees. Blister pack ( 1 ) according to claim 1 or 2, characterized in that the first side wall ( 22 ) and the second side wall ( 23 ) opposite side walls of the blister hood ( 20 ). Blister pack ( 1 ) according to one of claims 1 to 3, characterized in that the blister hood ( 20 ) a third side wall ( 24 ) and a fourth side wall ( 25 ). Blister pack ( 1 ) according to claim 4, characterized in that the third side wall ( 24 ) and the fourth side wall ( 25 ) to the blister card level ( 10 ) are inclined differently. Blister pack ( 1 ) according to claim 5, characterized in that a difference between a third inclination angle of the third side wall ( 24 ) and a fourth angle of inclination of the fourth side wall ( 25 ) is greater than 2 degrees. Blister pack ( 1 ) according to claim 4 to 6, characterized in that the first side wall ( 22 ) and the third side wall ( 24 ) a common edge ( 28 ), the first side wall ( 22 ) and the third side wall ( 24 ) to the blister card level ( 10 ) are more inclined than the second side wall ( 23 ) and fourth side wall ( 25 ). Blister pack ( 1 ) according to one of claims 1 to 7, characterized in that the first side wall ( 22 ) and the second side wall ( 23 ) of the blister hood ( 20 ) up to a hood cover ( 26 ) substantially parallel to the blister card ( 10 ). Blister pack ( 1 ) according to claim 8, characterized in that the hood cover ( 26 ) a survey ( 29 ), a depression or a finger rest surface ( 27 ) having. Blister pack according to claim 9, characterized in that the survey ( 29 ), the depression or the finger support surface ( 27 ) is arranged off-center. Blister pack ( 1 ) according to one of claims 1 to 10, characterized in that the covering layer ( 13 ) below the blister hood ( 20 ) has a predetermined breaking point. Blister pack ( 1 ) according to one of claims 1 to 10, characterized in that the first side wall ( 22 ) and the second side wall ( 23 ) have different material thicknesses.

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