DE8118904U1 - Packaging container - Google Patents

Description

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Diploma in Phys. Heinrich Seids · Patent Attorney · Bierstaafer Höhe 'l5 · PO Box' s'lOS. ' eioo Wiesbaden 1 ST (0 6121) 56 20 22

The invention relates to packaging containers made of thermoplastic material, in particular by thermoforming a film or plate made of thermoplastic material container, which is essentially at the top have radially outwardly extending flange-like edge surrounding the opening surface of the container, on the after filling the container with a flat lid, preferably made of metal foil or metal foil Plastic coating to be sealed on.

Packaging containers of this type are widely used in practice as cup-shaped packaging for dairy products, especially yogurt. For packaging beverages, these have known packaging containers however, the defect that the sealing edge surrounding the container opening is more or less sharp-edged on its circumference and is therefore unsuitable, or at least inconvenient, for drinking directly from the packaging container.

In contrast, it is the object of the invention to provide packaging containers of the type mentioned at the outset in this respect to improve that the opening edge of the container receives a smooth, edge-free circumference to the contents comfortably To be able to drink directly from the packaging container, whereby the sealing of the lid on the packaging container not difficult and with conventional machine

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Dipl.-Phys. Heinrich Seids. Patent attorney · ftlerstacMer Höhe'l5 · VostfaA's \ 05. " Hioo Wiesbaden 1 ■ &" (06121) 562022

Equipment should be feasible unchanged.

This object is achieved in that the Sealing edge on its outer circumference over a rounding in a folded down and towards the container wall The lip edge passes over, the width of the sealing edge and the shape of the container wall and the lip edge in this way are coordinated that the axial projections of the container wall and the lip edge on the underside the edge of the seal with a ring-shaped 3n free strip leave sufficient width for a sealed abutment.

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In this way, on the one hand, the edge of the lip enables the contents of the container to be conveniently consumed directly from the packaging container, wcuYes any risk of injury to the lips of the user is excluded. On the other hand, the packaging container according to the invention can be used in the same way close mechanical devices by sealing a flat lid, as was previously the case for closing the conventional packaging container can be used. So much for the conventional capping machines with a lot wide sealed abutments can be made by making slight changes, for example attaching a Attachment or cutting a groove, such a wide sealing abutment to the width actually required to be brought. One with a narrower repositioning

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Dipl.-Phys. Heinrich Seids · Patent Attorney · feie'rStadter Höhe " Ί.5 · Pbstfadi 5l05 · ' 6200 Wiesbaden 1. ξ? (O 6121) 56 20 22

surface formed sealing abutment also has the advantage that it is under the sealing tool on the Lid and the pressure exerted on the sealing edge can be slightly elastically pressed into the underside of the sealing edge somewhat and is therefore suitable for absorbing circumferential differences in thickness of the sealing edge and the uniform all around To improve the sealing of the lid. Such a seal = abutment with the abutment surface limited to the necessary width can then be axially unhindered from below between the most radially protruding parts of the container wall and the lip edge to the bottom of the seal edge. The sealing abutment is also withdrawn from the underside of the sealing edge unhindered. In other words: packaging containers according to the invention can be used in the same way in conventional Closing machines close when the sealing abutment is in its Width is reduced to the necessary extent.

For the formation of the lip edge offer themselves in the invention Packaging containers a wide variety of options, selected depending on the application and request can be: for example, the lip edge can be designed conically narrowing downwards.

Another possibility is that the lip edge is curved downwardly narrowing, wherein

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Dlpl.-Phys. Heinrich Selds. Patent attorney. Blerstadter Höhe 15 · Postfadt SlOS. 6200 Wiesbaden 1.

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the concave side of the curvature of the container wall is opposite.

The lip edge can also be flanged onto the outer circumference of the sealing edge as an at least almost closed roll be.

With all these possibilities, the production of the lip edge is to be done in a simple manner = one has only when forming the packaging container, the circumference edge at the container opening correspondingly wider and part of this circumferential margin, namely the over the desired width of the sealing edge going beyond width in conventional edge flanging machines downwards unc to be reshaped towards the container wall. This production method can be carried out particularly favorably if the The edge of the lip is less thick than the edge of the seal. You can set the thickness of the lip edge between about Set up 20 to 80% of the seal edge. This can already be done when the packaging container is being formed provide.

A particularly advantageous embodiment of the fiction according to the packaging container provides that the sealing edge on its outer circumference in an annular transition area is formed to the lip edge with reduced thickness. This annular transition area can be used here

"ι Dlpl.-Phys, Heinrich Selds ■ Patent attorney · Blerstadter Höhe 15 · P.O. Box 5105 ■ 6200 Wiesbaden 1 · © (0 6121) 562022

on the underside of the sealing edge to form a receptacle for the lip edge which is designed so that it can be elastically pressed. In this embodiment, the packaging containers according to the invention closed in any conventional closing machine by sealing on a flat lid will. If such closing machines are equipped with sealed abutments, their abutment surface is only the absolute Has the necessary width, the sealed abutment can be unhindered between in the manner described above the most radially protruding parts of the container wall and the lip edge on the underside of the sealing edge introduce. In capping machines with excessively wide The abutment surface then becomes elastic in the receptacle formed on the underside of the sealing edge pressed. The lip edge then forms a spring element, which the circumferential evenness of the sealing tool the lid and the sealing edge sealing pressure exerted significantly improved, even if the sealing edge has circumferential thickness differences.

Some exemplary embodiments are explained in more detail below with reference to the drawing. Show it:

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Dipl, -Phy «. Heinrich Seid «. Patent attorney. Vlerstadter Höh'e'l5 -VostfadiVlOS! 6200 Wiesbaden 1 G? (06121) 562022

1 shows a packaging container according to the invention in side view;

FIG. 2 shows a partial section with a view from below of the container edge corresponding to 2-2 of FIG. 1, enlarged;

3 shows the area 3 of FIG. 1 during the sealing of a flat lid;

4 shows a second embodiment of the area 3

of Figure 1 in the same representation as Figure 3 and

FIG. 5 shows a third embodiment of the area 3 of FIG. 1 in a corresponding representation like figure 3.

The packaging container 10 shown in Figure 1 is made in one piece from thermoplastic material, for example Polystyrene, or deep-drawn from a laminate of different thermoplastics and is used for packaging from drinking yoghurt. The cross section of the container 10 is circular. However, all others come as well Cross-sectional shapes into consideration, for example elliptical cross-section, square cross-section, in particular square Cross-section, partially circular rounded, for example circular, cross-section with a flattened one Page and the like. Starting from the container bottom 11, the peripheral wall 12 widens conically

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DIpl.-Fhys, Heinrich Silk. Patent attorney · Wirötadtiär Höh6 IS · TPbstfach W105 f 6200 Wiesbaden 1. ® (0 6121) 56 20 22

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at the top and merges into a counter-conical stacking and stabilizing edge 13 at the upper end. This Stacking and stabilizing edge 13 is at its upper end through a substantially flat opening surface 14 of the packaging container IO lying sealing edge 15 completed. This seal edge goes on the outer circumference 15 in one piece into a lip edge 16 which, starting from the sealing edge 15, extends downwards and with respect to the container axis extends inward. The transition from the sealing edge 15 to the lip edge 16 is in the form of an outer rounding 17 designed to allow a comfortable placement of the container edge on the lips of the user.

Figure 2 shows a greatly enlarged detail of a section through the peripheral wall 12 and the bottom view of the container edge. The axial projection 19a (projection in the sense of 2-2 of FIG. 1) can be seen in FIG Container peripheral wall 12 and the stacking and stabilizing edge 13. Furthermore, the axial projection 19b of the lip edge 16 recognizable. An annular free strip 19 remains between the two axial projections 19a and 19b.

In this annular free strip 19 can be unhindered a sealing abutment axially from below between the container wall (stacking and stabilizing edge 13) and the Insert the lip edge 16 up to the underside of the sealing edge 15 and also pull it back from there unhindered.

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Dipl.-Phys. Heinrich Seids ■ Patent attorney · Bierstadter Höhe IS · Vostfadi VlOS! 6200 Wiesbaden 1. © (0 6121) 56 20

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According to the invention, this free strip 19 is more sufficient for the abutment surface of a sealed abutment Wide.

In the example of Figure 3, the lip edge extends somewhat arched and narrowing from the rounding 17 on Outer circumference of the sealing edge 15 downwards. The concave side of this curvature is the container wall or the Stacking and stabilizing edge 13 opposite, so that the convex side of the curvature is outward. In this For example, the thickness of the lip edge 16 is approximately 40% of the thickness of the sealing edge 15, the thickness of the lip edge 16 decreases from the connection point to the sealing edge 15 or the rounding 17 towards the free edge.

As can be seen from Figure 3, the limited to the necessary width abutment surface 23 is on an annular Increase in the sealing abutment 20 is formed. With this annular elevation, the sealed abutment can be 20 between the most radially protruding area of the stacking and stabilizing edge 13 and the Introduce the narrowest part of the lip edge 16 axially unhindered, leaving a considerable margin 23 ' is. The narrow design of the abutment surface 23 also ensures that the heated from Sealing tool 22 on the metal foil lid 18 and the

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Dipl.-Phys. Heinrich Seids · Patent Attorney · tilerstaäter Höhe 15 ■ 'Postfach * si05 "62 * 00 Wiesbaden 1. S? (06121) 562022

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Sealing edge 15 pressure exerted is distributed practically evenly over the entire circumference of the sealing point. This is made possible by the fact that the abutment surface 23, which is only limited to the necessary width, is located under the the pressure exerted by the sealing tool 22 is pressed somewhat into the lower surface of the sealing edge 15.

After the lid 18 has been sealed onto the sealing edge 15, the sealing abutment 20 can again be axially unhindered pull off, i.e. lift the closed container 10 axially out of the sealed abutment 20.

As shown in dashed lines in FIG. 3, the lip edge 16a can also extend in a purely conical manner from the rounded portion 17 downwards and extend inward if for any reason it appears appropriate or desirable.

In the example in FIG. 4, the packaging container differs of that according to FIG. 3 only in that the lip edge 16b on the outer circumference of the sealing edge 15 is flanged as an almost closed lip roll. Also | this formed as a lip roll lip edge 16b leaves the axial access of a sufficiently wide abutment surface 23 of the sealed abutment 20 to the underside of the The sealing edge 15 closes unhindered, so that the pressure exerted on the cover 18 and the sealing edge 15 by the sealing tool 22

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Dipl.-Phys. Heinrldi Seids ■ Patent attorney · Bierstadter Höhe 15 · Postfach 5105 ■ 6200 Wiesbaden 1 ■ S? (0 6121) 562022

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Sealing pressure is securely supported.

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In the example in FIG. 5, the sealing edge 15a is in an inner annular area, which largely corresponds to the areas 19 and 19a correspond to FIG. 2, are relatively thick-walled and solid. Radially outward connects to this inner area is a transition area 25 of the sealing edge 15a on which is made much thinner and over the Rounding 17 merges into the lip edge 16c designed as a lip roll. In the transition area 25 is the top of the sealing edge 15a in the opening plane of the container 10 continued and the reduction in thickness by molding a receptacle 26 for the possibly bent Lip edge 16c generated. The width of the abutment surface 23 of the sealed abutment 20 is in this example dimensioned so that the sealing edge 15a inward of the receptacle 26 with its underside on the abutment surface 23 places and the lip edge 16c in an annular groove formed on the other side of the abutment surface 23 in the sealed abutment 20 engages. The packaging containers designed according to FIG. 5 can, however, also be used in such closing machines close, in which a wide, up to the receptacle 21 extending abutment surface is formed. In such a case, the lip edge 16c lies on the abutment surface and is below that of the sealing tool 22 pressure exerted on the lid 18 and the sealing edge 15a

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Dlpl.-Phys. Heinrich Seids ■ Patent attorney · Bierstadt'er Höhe 15 · PO Box 5105 · '6200 Wiesbaden 1 ■ ST (06121) 562022

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resiliently pressed into the lip rim receptacle 26. This has the consequence that the sealing edge 15a at least in his thinner transition area 25 under the spring action of the compressed lip edge 16c upwards is pressed against the underside of the lid 18, whereby it is ensured at all times that the effective sealing required pressure is built up. In this way, extensive fluctuations in the thickness of the sealing edge can be avoided 15a can be bridged safely and easily.

In any case, around the sealed abutment 20 with its narrow abutment surface 23 between the most radially protruding Parts of the container wall, in particular the stacking and stabilizing edge 13 and the lip edge 16, 16a, 16b, 16c is in the embodiments according to Figure 3 to 5, the sealing abutment 20 is equipped with a receptacle 21, which the sealing edge 15, 15a and the Lip edge 16, 16a, 16b, 16c engages around.

The packaging container 10 is made of thermoplastic material, preferably by thermoforming from tape-shaped or plate-shaped semi-finished plastic products. as preferred materials come into consideration: polystyrene, polyolefins, polyesters and various thermoplastic materials Laminate semi-finished product made from plastics.

Claims (8)

ίο 15 PATENT ADVERTISER DIPL.-PHYS. HEINRICH SEIDS 6200 Wiesbaden 1 Blcrotadter Höhe 3.5 PO Box 5105 Telephone (0 612α) 56 20 22 Postscheck Frankfurt / Main 1S10 öS - 602 Bank Deutsche Bank 306 yjx - Nass, Sparkasse 120 040 995 Wiesbaden, June 26, 1981 X 285 VNR: 1075 65 S / ha Bellaplast GmbH Karl-Bosch-Straße IO 6200 Wiesbaden S ΐ ^ ΐ Cw ΐ ^ ϊ ί «? * «Ϊ́ Sv * ΐΐ« S ^ S E ^ h Ζΐ ■>? ΐΐ «ϊΐ« ■■ Η ^ ΐ ■■■■ ΐΐ hbb JSS 5S SZ ^^ β ^ ϊ ^ 5 νν ph ^ ΐ ^^ S ϊϊϊ Packaging container Protection claims 1) Packaging container made of thermoplastic material, in particular by thermoforming a film or plate Container made of thermoplastic material, which at the top extends essentially radially outwards extending, surrounding the opening surface of the container, flange-like edge, on the after Fill the container with a flat lid, preferably! made of metal foil or metal foil with plastic coating, is to be sealed characterized in that the sealing edge (15) merges on its outer circumference via a rounding (17) into a lip edge (16) folded downwards and towards the container wall (12, 13), the width (15 ¹ ) of the sealing edge and the Shaping of the container wall (12, 13) and the lip edge (16) in such a way 't ·· 11 Il Il I • ■ «I tit III» ti ι ■ itii ii ■ · Rr \ - · - r-i 1-ι-ι 1 τι ι ι ι Il Dlpl.-Phy «. Helnrith silk. Patent attorney. b'ie'rstadYer Höhe Ϊ5 ■ Postfadi Mos. '& 00 Wiesbaden 1 · © (0 6121) 562022 are tuned ^to the in that the axial projections (19a, 19b) of the container wall (12, 13) and the lip edge an annular free strip (19), left (16) on the underside of the sealing rim (15) therein of sufficient width. 2) Packaging container according to claim 1, characterized in that the lip edge (16) extends downwards is designed to narrow conically. 3) Packaging container according to claim 1, characterized in that the lip edge (16) narrows downwards is curved, the concave side of the curvature of the container wall (12, 13) opposite. 4) Packaging container according to claim 1, characterized in that the lip edge (16) as at least almost closed roll is flanged to the outer circumference of the sealing edge (15). 5) Packaging container according to one of claims 1 to 4, characterized in that the lip edge (16) is smaller Thickness than the sealing edge (15). 11 * I » Dipl.-Phys. Heinrich Seids ■ Patent attorney · Bierstadter Höhe 15 · P.O. Box 5105 · 6200 Wiesbaden 1 ■ ® (0 6121) 562022 6) Packaging container according to claim 5, characterized in that the thickness of the lip edge (16) between about 30% and 80% of the thickness of the sealing edge (15). 7) Packaging container according to one of claims 1 to 6, characterized in that the sealing edge (15) on its outer circumference in an annular transition area (25) to the lip edge (16) with reduced thickness is trained. 8) Packaging container according to claim 7, characterized in that that the annular transition area (25) on the underside of the sealing edge (15) to a receptacle (26) for the resiliently compressible lip edge (16) is formed.