US 20090242451 A1
A blister pack (1) contains a blister portion (5) and a base portion (6), between which a blister is inserted in a sandwich-like manner. The base portion (6) contains detachable blocking segments (7) which each cover a push-out region for articles (18). For childproofing purposes, the blister portion (5) contains safeguarding segments (8) which overlap the blocking segments (7) in each case and can be swung up out of the plane of the blister portion (5) by pressure being applied from the rear side. The safeguarding segments (8) here are configured such that, in the rest position, they prevent access to the blocking segments (7), and it is only after the safeguarding segments (8) have been at least partially swung up that they allow pressure to be applied to the blocking segments (7). In order to increase the childproofing further, the base portion (6) has push-out segments (9) which are located above the safeguarding segments (8) and can be pressed in from the rear side (R) in order to swing out the safeguarding segments (8).
1. Blister pack (1) for a blister (2), having a blister portion (5), which forms a front side (F), and a base portion (6), which forms a rear side (R), between which the blister can be, or is, inserted in a sandwich-like manner, it being the case that the blister portion (5) has cutouts (10) for accommodating the cavities (3) of the blister (2), and that the base portion (6) contains detachable blocking segments (7) which each cover a push-out region for articles (18) in a cover sheet (11) of the blister in a rest position and, in order to produce a removal position, can be partially detached from the base portion in a first step by pressure being applied from the front side (F), as a result of which, in a second step, a partially detached blocking segment (7) can be gripped for removal purposes, characterized in that the blister portion (5) contains safeguarding segments (8) which overlap the blocking segments (7) in each case and can be at least partially detached from the plane of the blister portion (5) preferably by pressure being applied from the rear side, the safeguarding segments (8) being configured such that, in the rest position, they prevent access to the blocking segments (7), and it is only after the safeguarding segments (8) have been at least partially detached that they allow pressure to be applied for the first step for detaching the blocking segments (7) from the base portion (6).
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The invention relates to a blister pack having the features of the preamble of Claim 1. Blisters for packaging medicaments in the form of tablets, capsules, dragees, etc. can be inserted into such blister packs. The blisters comprise a carrier sheet, which is provided with cavities for accommodating articles, and a flat, pressure-sensitive cover sheet. For the purpose of removing the articles, the latter are pushed out through the cover sheet in a push-out region assigned to the cavity. These packs are intended to make it more difficult for children to gain access to the articles.
Numerous blister packs which tackle the problem of childproofing are already known. A generically comparable blister pack is described, for example in US 2004/0188312 A1. The blister pack in this document essentially comprises a first portion, which forms a front side and has cutouts for accommodating the cavities of the blister, a second portion, which forms the rear side, and a central portion, which is arranged between the blister and the second portion. Removable blocking segments are arranged on the second portion and each cover a cutout for articles and/or a corresponding push-out region of a cover sheet of the blister. These blocking segments are fixed by adhesive bonding to likewise detachable individual segments of the central portion. D-shaped push-out segments (push tabs) are arranged on the first, front portion. By virtue of pressure being applied to this D-shaped segment, a blocking segment can be partially detached from the rear-side portion and, finally, torn off. The push-out region is then exposed and the articles can be pushed out. In order that the push-out segments cannot readily be pressed in, they are protected on the rear side of the blister pack by tear-off segments. These segments are arranged in rows on the second portion, each segment being assigned to a respective push-out segment. It is only once such a segment has been torn off that it is possible to press in a push-out segment in order for the blocking segment to be partially pushed out in accordance with the functional description. For further safeguarding, a tear-off strip is provided at a front end of the row of tear-off segments, and this strip is to be torn off first of all in order to release the adjoining segments. In respect of childproofing, it has been found that at least the tear-off strip and the adjoining tear-off segments in the second, rear-side portion can be torn off comparatively quickly by children. A further disadvantage is that, on account of a double layer being used on one side of the blister, the outlay in respect of material is high. Production of the blister pack has proven to involve high outlay in particular on account of the necessary adhesive-bonding operations.
It is therefore an object of the present invention to avoid the disadvantages of the prior art, in particular to provide a blister pack of the type mentioned in the introduction which satisfies stringent childproofing requirements. Furthermore, the blister pack is to be cost-effective and straightforward to produce.
These objects are achieved according to the invention by a blister pack having the features of Claim 1. The essential components of the blister pack are the base portion and the blister portion, which are each preferably of planar design. The outlay in respect of material used for the blister pack is thus low. Depending on the use purpose, the blister could be configured as a blister card, as a blister wallet (at least one cover portion would be necessary for this purpose) or even as a box. Using the blocking segments and safeguarding segments of the design according to the invention ensures a high level of childproofing. Since it is only after the safeguarding segments have been at least partially detached that it is possible to apply pressure for the first step for detaching the blocking segments from the base portion, the functioning of the opening operation for pushing out articles is difficult for children to understand. A further advantage of the blister pack is that the base portion and the blister portion need only be connected to one another in an outer peripheral region. This fixing may preferably be constituted by adhesive bonding. The adhesive bonding here preferably extends all round the periphery. There are not usually any adhesive bonds in the region of the blocking segments and safeguarding segments.
The safeguarding segments can be at least partially detached from the plane of the blister portion by pressure being applied from the rear side. Of course, it would also be possible for the safeguarding segments to be detached, if need be, in other ways. As an alternative, it would be conceivable, for example, for each safeguarding segment to be adjoined by a cutout in order for the safeguarding segment to be peeled off. Such cutouts would be configured such that they would allow fingernails to access a peripheral region of a safeguarding segment.
In a first embodiment, the safeguarding segments may be swing-action portions which can be swung up out of the plane of the blister portion. A swing-action portion may be a type of lug which is easy to grip and swing up.
The swing-action portions may be formed in each case by approximately U-shaped perforation lines. However, other non-continuous weakening lines would also be conceivable in principle. The ends of these perforation lines or weakening lines define a swing-action line around which the swing-action portion can be swung up. The swing-action line could be predefined by a folding line in order for the swing action to be improved.
The safeguarding segments could be formed by continuous perforation-line arrangement which is subdivided into two perforation-line portions of different strengths. A first perforation-line portion has weaker perforations, as a result of which the safeguarding segment in this region can be easily pressed in for a first peel-off step. A second perforation-line portion has—in comparison with the first perforation-line portion—stronger perforations. This perforation-line arrangement results in advantageous operational guidance since the user, first of all, would intuitively manipulate the safeguarding segment in the region of the weaker perforations. The stronger perforations in the second perforation-line portion serve merely to allow a partially swung-up safeguarding segment to be torn off completely. The perforation-line arrangement can be achieved, for example, such that the crosspieces between the perforation cuts for the weaker perforations are shorter than the corresponding crosspieces for the stronger perforations.
Of course, it is not imperative for the swing-action portions to be configured merely such that they can be swung up. If need be, the safeguarding segments, in particular the swing-action portions, could also be formed by continuous perforation lines in each case. For example, the ends of the U-shaped perforation lines could be connected by weakening crosspieces, as a result of which, once it has been swung up, the swing-action portion could easily be detached or torn off completely.
It may be advantageous if a respective swing-action portion can be swung up around a swing-action line which, as seen in plan view, runs preferably approximately centrally through the blocking segment. This swing-action line, however, need not run precisely over a centre line of the blocking segment. The swing-action line may define a front end of an overlapping region between the blocking segment and safeguarding segment. This overlapping region defines an access surface area to the blocking segment, which is preferably of sufficient size to allow this region to be manipulated efficiently by a finger. Handling can be simplified in this way and, in particular, it is easier for the elderly to use the pack.
In order to render the opening operation more difficult so as to increase the childproofing, it may be expedient if the base portion also has push-out segments which are located beneath the safeguarding segments and can be pressed in from the rear side. By virtue of pressure being applied to a respective push-out segment, the safeguarding segment can be partially detached, in which case—in particular if it is configured as a swing-action portion—it can be swung out. If the childproofing requirements are less stringent, it would also be possible to provide just corresponding cutouts instead of push-out segments.
It may be advantageous if, as seen in plan view, a push-out segment is enclosed by a safeguarding segment in each case in order to be fully covered, a push-out segment abutting in planar fashion in a front safeguarding-segment end region which is directed away from the swing-action line.
It may be particularly advantageous if, as seen in plan view, a safeguarding segment covers in each case part of a blocking segment and an entire push-out segment. Such an arrangement has an advantageous effect on the handling of the blister pack.
The blocking segments and/or the push-out segments may be formed in each case by continuous perforation lines or other weakening lines. It is, of course, also conceivable, however, for example for the push-out segments to be designed as swing-action parts. In this case, they could be predefined by a U-shaped perforation line.
The perforation lines for the blocking segments and for the push-out segments may be separated from one another. Since the blocking segments and the push-out segments are thus designed as separate segments on the base portion, it is ensured that unintended multiple openings can be prevented.
The blister portion and the base portion may be designed as separate planar components. It may also be advantageous, however, if the blister pack comprises a single blank made of cardboard or cardboard laminate. Of course, it would also be possible for the blank to consist of plastic.
The respective segments, i.e. the blocking segments, the safeguarding segments and the push-out segments, may be arranged in a mirror-symmetrical manner, as a result of which commercially available blisters with two parallel rows of cavities can easily be packaged in an advantageous manner.
A further aspect of the invention relates to a blank for the previously described blister pack. The blank has a blister portion and a base portion, which are separated from one another by a folding line. All that is thus required in order for the blister to be inserted in a sandwich-like manner is for the base portion to be swung over around the blister portion. Of course, the blank could also have a cover portion, which would cover the blister portion in order to protect the cavities. This cover portion would likewise be separated by a folding line from the blister portion or from the blister/base portion (blister wallet). In addition, the cover portion could be adjoined by a second cover portion, which could also cover the base portion.
Further individual features and advantages of the invention can be gathered from the following description of the exemplary embodiments and from the drawings, in which:
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A further exemplary embodiment of a blank 17 for a blister pack is shown in