LU84233A1 - PACKAGING CONTAINER - Google Patents

Description

Demande de brevet, Ôc. 28th juin .. 13.82 ......

/ / Désignation de l’inventeur (1) Le soussigné .... M.9.D ..? .. l.®.y.L ..Ç.b.3.r..l.G.s. .Mun.cJ! Ieii, .... con.s.ei.l .... en-.pKo.prj.ë.t-é · __________________ ............. ... î.n.dus.tr.le.ll.e .... à .... Luxeni.b.ou.rg, .- .. l-.î.ay .boulevard Prinee-Henri .. .................

agissant en qualité de déposant - de mandataire du déposant - (2) ....... la..so.Qié.t.é ..... di.te: ..... Bellapl.as .t ... Gml) .H., .... KAr..l.-Bo.sch-S.tr.a.ss.e..y .... li) ....... ........

6200 Wiesba den en Ré P ub ligueFédéra le; .... d Al 1 ema g η e (3) de l'invention concernant: ........ "Ve rpa c ku ng sb eh. À '. ] ter .. "........ ..................................... .................................................. ..........................

désigne comme inventeur (s): 1. Nom et prénoms .. Monsieur Bernd. SCH UC K ............................................ ... ........................

Address ..Er.l..C..b.r..Q.l.l.e.nh.a.u.e.r .-. S.tr.ass e .32 b.,. 62 00 ... Wies b ad en. Rép, -Féd.

2. Nom et prénoms ............................................. .................................................. .................................. d ..!. Al.l..e.magn.e.

Address ................................................. .................................................. ........ .......................................... ..............................

3. Nom et prénoms ............................................. .................................................. .................................................. ....................

Address ................................................. .................................................. .................................................. ..............................

II affirme la sincérité des indications susmentionnées et déclare en assumer l’entière responsabilité.

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Claiming priority 2.4594 of the corresponding application in Germany from June 29th, 1981 under number G 81 18, 934.6 - f DESCRIPTION of a PATENT APPLICATION in LUXEMBOURG in the name of Bellaplast GmbH for: "packaging container".

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The invention relates to packaging containers made of thermoplastic, in particular containers produced by thermoforming a sheet or plate made of thermoplastic, which have a flange-like edge which extends essentially radially outwards and surrounds the opening surface of the container. on which a flat lid, preferably a lid made of metal foil, is to be sealed after the container has been filled. Packaging containers of this type are used in practice on a large scale as cup-shaped packaging for milk products, in particular yogurt. For drinks, however, these known packaging containers have the defect that the sealing edge surrounding the container opening is more or less sharp-edged on its circumference and is therefore unsuitable, at least inconvenient, for drinking directly from the packaging container.

A packaging container of this type is known from DE-GM 66 00 652, in which the sealing edge according to its free. 20 peripheral edge slightly deformed from the opening surface of the container, but should be designed to be elastically bendable in this opening surface. The purpose of this training is that inevitable differences in the thickness of the sealing edge when the lid is sealed can be absorbed by more or less strong elastic bending ^ i! -—- if - 3 -. In the case of these known packaging containers, however, the sealing edge is just as sharp on its circumference as the packaging containers of this type with a practically flat design of the sealing edge.

5 In contrast, it is an object of the invention to significantly improve packaging containers of the type mentioned in that the opening edge of the container is given a smooth, edge-free circumference in order to be able to drink the contents directly from the packaging container 10, the sealing of the lid on the packaging container is not difficult and should be able to be carried out unchanged with the conventional mechanical equipment.

This object is achieved in that the 15 sealing edge of the packaging container on its outer circumference merges into a downward and after the container wall folded lip edge which is elastically bendable up to the bottom of the sealing edge. On the one hand, this makes a comfortable | 20 drinking the contents of the container directly from the packaging container enables 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 closed in the same machine devices / _II_d 1: Uf - 4 - by sealing a flat lid, as was previously used for closing the conventional packaging containers. Here, when the container is closed on the underside of the seal-5 edge, the lip edge bent elastically provides a spring

of the element that is equally well suited to thickness reduction; catch the seal edge, like that in DE-GM

66 00 652 proposed shape on the edge of the seal. It is thus not only readily ensured by the packaging container according to the invention that a flat lid is sealed on, but also improved compared to conventional packaging containers with an essentially flat sealing edge. After closing, i.e. When the lid is sealed, the lip edge resumes its original shape and shape

Location back.

The packaging container according to the invention preferably has a round or oval cross section. As far as packaging containers have sharp-edged corners in their cross-section, the lip edge can be omitted from these corner areas 1, since the user will not attach such sharp-edged corners to the lips anyway to drink.

In the packaging container according to the invention, preference is given to the lip edge having a smaller thickness than the seal ^

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- 5 - edge to facilitate the elastic bending of the lip edge to the underside of the sealing edge.

For this purpose, the thickness of the lip edge can be between about 2Θ to 80% of the sealing edge.

5 For the shaping of the lip edge, all possibilities come into consideration, which on the one hand ensure a safe bending of the lip edge to the underside of the sealing edge during the closing process and on the other hand offer the user convenience when attaching 10 to the lips. For example, the lip edge can be conically narrowing downwards. However, the lip edge can also be designed so as to narrow downwards, the concave side of the curvature being opposite the container wall. To unimpeded bending of the lip edge to the bottom of the

To reach the edge of the seal, the lip edge can be formed with a smaller width than the edge of the seal. However, since the lip edge can also be elastically bent in itself, at least in the case of training with a relatively small thickness, it is also entirely possible for the lip edge to be applied to the peripheral wall of the container in the case of training with a larger width.

A particularly advantageous embodiment of the invention 1-TT — f — 6 — provides that the sealing edge on the outer circumference is designed with a reduced thickness in an annular transition region to the lip edge. This annular transition area to the lip edge is of reduced thickness 5. This annular transition region can be designed on the underside of the sealing edge as a receptacle for the elastically pressed lip edge.

Some exemplary embodiments are explained in more detail below with reference to the drawing. 1 shows a side view of a packaging container according to the invention;

2 shows area I of FIG. 1 a) in section and b) during the opening of a flat lid; FIG. 3 shows a modified embodiment of the region 8 I of FIG. 1 in the same representation as FIG. 2;

Fig. 4 shows a third embodiment of area I.

of Figure 1 in the same representation as 20 Figure 2 and

Fig. 5 shows a fourth embodiment of area I.

of Figure 1 in a corresponding representation as Figure 2. /

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The packaging container 10 shown in FIG. 1 is thermoformed in one piece from thermoplastic material, for example polystyrene or from a laminate of various thermoplastic materials, and is used for packaging drinking yoghurt. The cross section of the container 10 is circular. Starting from the container bottom 11, the peripheral wall 12 widens conically upwards and merges at the upper end into a counter-conical stacking and stabilizing edge 13. This stacking and stabilizing edge 13 is closed at its upper end by a sealing edge 15 lying in the opening surface 14 of the packaging container 10. On the outer circumference, this sealing edge 15 integrally merges into a lip edge 16, which extends from the sealing edge 15 15 downwards and inwards with respect to the container axis. The transition from the sealing edge 15 to the lip edge 16 is designed in the form of an outer rounding 17 in order to enable the container edge to be conveniently attached to the lips of the user.

In the example of FIG. 2, the lip edge 16 extends from the outer circumference of the sealing edge 15 essentially conically inwards, an angle £ of approximately 40 ° being formed between the sealing edge 15 and the lip edge 16. The thickness of the lip rim 16 in this example is approximately 50% of the thickness of the sealing rim / 15.

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In practice, this means that with a conventional thickness of the sealing edge of approximately 1.0 mm, the thickness of the lip edge is approximately 0.5 mm.

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As shown in part b) of Figure 2, the filled 5 packaging container 10 by sealing a flat

Cover 18, for example made of metal foil or a laminate of metal foil and layers of thermoplastic plastic, closed on the sealing edge 15. For this purpose, the filled packaging container 10 is placed in a seal-10 abutment 20 with a seal 15 that aligns the seal edge

Recording 21 used. The lip edge 16 lies on the supporting surface of the sealing abutment 20.

If pressure is then exerted with the heated sealing tool 22 from above onto the edge of the lid 18 and from there onto 15 the sealing edge 15, the lip ranc 15 bends elastically to the underside of the sealing edge 15 | approach. This tension creates a counterforce to the pressure of the sealing tool 22 in the lip rim j 15, | which is sufficient to seal the peripheral edge 15 with the lid 18 with a pressure sufficient for sealing from below, even at those peripheral areas s 20 in which the sealing edge is somewhat thinner; Press sealing tool 22. , //

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After sealing the lid 18, i.e. when the closed packaging container 10 is removed from the sealing abutment 20, the lip edge 16 essentially returns to the position shown in part a) of FIG. But even if the lip edge 16 at

Closing the container 10 should undergo permanent deformation, the rounding 17, which is pleasant for attachment to the lips of the user, is fully retained on the outer periphery of the container edge, as is clear from part b) of FIG. 2.

In the example in FIG. 3, the lip edge 16a extends somewhat more downward than in the example in FIG. 2. In addition, the lip edge 16a is somewhat curved, the concave side of this curvature being opposite the container wall 15 or the stacking edge 13, that is to say the the convex side of the bulge faces outwards. In this example, the thickness of the lip edge 16a is approximately 40% of the thickness of the sealing edge 15, the thickness of the lip edge 16a decreasing from the connection point to the sealing edge 15-20 or the rounding 17 towards the free edge.

As part b) of FIG. 3 shows, the pressure exerted by the sealing tool 22 on the cover 18 and the sealing edge 15 is sufficiently high to elastically press the curvature of the lip edge 16 until the lip edge / L6a 1 -—— r - 10 - comes into contact with the underside of the sealing edge 15 at least in places. The curvature of the lip edge 16a increases the counterforce generated during elastic bending to the underside of the sealing edge 15, so that a ring-5 to ensure effective pressing of the sealing edge 15 and lid 18 onto the underside of the sealing tool 22 is ensured even when the sealing edge 15 is in its * 'circumference should have areas of reduced thickness.

While in the examples of FIGS. 2 and 3, the width 10 of the lip edge 16 or 16a is less than the width of the

Is the sealing edge 15, and thus the free circumference of the lip edge 16 or 16a remains at a distance from the peripheral wall of the container or the stacking ring 13 even when bending towards the underside of the sealing edge, in the example of FIG. 4 the lip edge 16b is wider than the j 'seal edge 15 formed. In this example, the lip edge 16b is essentially conical, and narrows downwards. This embodiment is to be chosen, for example, in those applications in which \ i! 20 the axial height h covered by the lip edge should be particularly large. The thickness of the lip edge 16b is in this example, about 40% of the thickness of the sealing edge 15.

| In addition, the thickness of the lip rim 16b decreases from that; Connection point to the sealing edge 15, ie the rounding] 25 17 towards the free edge of the lip edge 16b./- / \ 1 -—- ίΡ - 11 -

As can be seen from part b) of Figure 4, s'i.ch - the free edge area of the lip edge against the outer surface of the stack edge 13, when the lip edge 16b under the action of the lid 18 and the. 5 sealing edge 15 exerted by the sealing tool 22

Pressure against the underside of the sealing edge 15 is bent elastically *. This is similar to the example in itself

3 shows the lip edge 16b deformed again / itself elastically, which leads to an increase in the counterforce generated in the lip edge and in the event of irregularities in the

Thickness of the sealing edge 15 improves the uniform quality all round.

In the example in FIG. 5, a relatively narrow, thin lip edge 16c is formed on the outer circumference of the seal 15 edge 15c. In addition, the sealing edge 15c is formed on its outer part with an annular transition region 23, which forms a lip edge receptacle 24 which stretches all around when the surface is smooth on the top of the sealing edge 15c on the underside of the sealing edge 15c. As part b) of FIG. 5 shows, the receptacle 10 in the embodiment according to FIG. 5 can also be closed in such conventional sealing devices by sealing a flat lid 18, in the case of which the sealing abutment 20c is closed up to the receptacle ^^ / i - 12 - »: 'Continuous' level support surface. In such a case, the lip edge 16c is completely inserted into the lip edge receptacle * 24 i * while the container 10 is being closed; indented. However, if a sealing abutment 20 is used, 5 which, as in the examples of FIGS. 2 to 4, between i | the effective contact surface and the receptacle 21 ver i j * | is deep, then the lip rim 16 can engage in this recess of the seal abutment 20 without or with only very little deformation (see dashed representation in 10 part b) of FIG. 5.) The packaging container 10 can be made of any thermoplastic commonly used for this purpose Plastic. Instead of packaging containers with a circular cross-section, those with an oval or other rounded cross-section can also be readily seen. In the case of packaging containers with an angular cross-section, the lip edge 16, 16a, 16b, 16c will only extend into the vicinity of the cross-sectional corner and be left out in the actual corner area. Difficulties occurring in corner areas when bending 20 of the lip edge to the underside of the sealing edge are thereby avoided. In addition, the lip rim is also not required in such cross-sectional corner areas because the user will not place the container on the lips with the corner area for drinking. / /

Claims (10)

13. I i «*« i i i i protection claims 1. Packaging container made of thermoplastic, in particular by thermoforming a film or plate made of thermoplastic, which has a radially outward 5 extending above, surrounding the opening surface of the container, flange-like edge, after which the container is filled a flat lid, preferential i. of metal foil, is to be sealed, j I characterized in that! 10 the sealing edge (15) merges on its outer circumference via a jii rounding (17) into a lip edge (16) folded downwards and towards the container wall (12, 13), which can be elastically bent up to the underside of the sealing edge (15) j is. / / j 4 «_ .... - -14- i i 2. Packaging container according to claim 1, characterized in that the lip edge (16) has a smaller thickness than the sealing edge (15). , 3) Packaging container according to claim 2, characterized marked 5 that the thickness of the lip edge (16) between v about 40% and 80% of the thickness of the sealing edge (15) be. 4. Packaging container according to one of claims 1 to 3, characterized in that the lip edge (16) is formed 10 conically narrowing downwards. j 5) Packaging container according to one of claims 1 to 3, characterized in that the lip edge (16) is »arched narrowing downwards, the concave side of the curvature of the container wall (12, v 15 11) opposite. 6. Packaging container according to one of claims 1 to 5, * characterized in that the lip edge (16) \. has a smaller width than the sealing edge (15). 20th 7) Packaging container according to one of claims 1 to 6, characterized in that the sealing edge (15c) on | Lid circumference in an annular transition area / »- 15 - (23) to the lip edge (16c) is formed with reduced thickness. 8. Packaging container according to claim 7, characterized in that the annular transition region (23) on n 5 of the underside of the sealing edge (15c) is designed as a receptacle (24) for the elastically pressed lip edge (16c). 9. Packaging container according to one of claims 1 to 8, characterized in that the lip edge (16) 10 extends in a round, preferably circular container cross section all the way along the entire circumference of the sealing edge (15). 10. Packaging container according to one of claims 1 to 8, characterized in that the lip edge (16) * 15 extends in angular container cross-section on each container side up to the corner area and is recessed in the actual corner area. Designs: —planches pages dont —Λ ...... page de garde —pages de description -..........- 3 .. pages de revendications abrégé descriptif Luxembourg, le 28 JUIJM982 Le mandataire: / y Charles Munich