LU84232A1 - PACKAGING CONTAINER - Google Patents

Abstract

A container primarily for liquids and having an outwardly directed rim (15) to which a metal foil lid (18) is bonded after the container is filled, includes a rounded portion (17) with a lip (16) to form a rounded edge so that liquid in the container may conveniently be drunk directly from the container. The shape and relative position of the container wall (12, 13), the sealing portion of the rim (15) and the lip (16) are such that an annular strip is left exposed on the underside of the sealing portion of the rim (15) to allow the lower part (20) of a lid sealing tool to engage the rim (15) from below. <IMAGE>

Description

Demonde de brevet de_______28 juin 1982_____ Désignation de l'inventeur - 0 Le soussigné Monsieur Charles München, conseil en propriété ___ _ _JJldus_t rie1.1 .e ... A._L.ux, e, in b..Q..urg · .,. 11.ay - b.Qu..le "vAr.d ..... Pri πγρ-Ηρππ '_________________ agissant en qualité de déposant - de mandataire du déposant -' 0" JJ ^ Q.cié.t .é ..... dit.e.; _. J.e1..1a.i)] as t .. GmbH. ..Karl.-Bosch-Stras sp, ΊΠ ___ ___6200 Wiesbaden en République Fédérale d * A11emagne (J) de l'invention concernant: _______ "Packaging container" __________________________ désigne comme inventeur (s): 1. Nom et prénoms ... Mo. ns.ie.ur ..... Bernd .... S.CJiLLC.K ______________________________________________________

Address Eri ch-ΟΠ enhauer-Strasse 32b. 6200 Wiesbaden. Rëp.Fëd.

«Small . d1 Al 1 emagne

Address __________________________________________________________________________________________________________________________________________________________________________ 3. Nom et prénoms ________________________________________________________________________________________________________________________________________________________

Address ____________________......_______________________________________________________________________________________________________________________________________________________ II affirme la sincérité des indications susmentionnées et déclare en assumer l'entière responsabilité.

__Luxembourg __ [e 27 août 19 82

ItMCE LüXtfcSüilRffiûîS DE IA ΡΜΡΚΠΕ INDUSTRIELLE *

Rtçi Ir t}. Àj _._ tîiÉL · - h —win. / ^ TiP ip

Upipost,. Ί ....... Τ '* 1' \ 'tsignaturei A é8026_ (* V -_il__ il \ - 4 ï f) Nom, prénoms, firme, address. V ". v f V,. ...... y- 2.4593 claiming the priority of the corresponding application in Germany from June 29, 1981 under number G 81 904.4 DESCRIPTION of a *

; PATENT APPLICATION

in LUXEMBOURG on behalf of

Bellaplast GmbH

for: "packaging container".

«* / N Γ '· JJ J- · ^ ^« -V ------- - I ..... --- - - 2 - * p

The invention relates to packaging containers made of thermoplastic, in particular by thermoforming a film or plate made of thermoplastic plastic.

Fabric-made containers which have a flange-like edge av ’| which extends essentially radially outwards and surrounds the opening surface of the container have a flat 'after filling the container! s cover, preferably made of metal foil or metal foil * i; Plastic coating to be sealed, 10 packaging containers of this type are widely used in practice as cup-shaped packaging for milk products, especially yogurt. For the packaging of beverages, these known packaging containers “have the defect, however, that they surround the opening of the container”; , i j 15 seal edge more or less sharp at its circumference; '' and therefore unsuitable for immediate drinking from the packaging container, at least uncomfortable.

In contrast, it is the object of the invention to pack. 1 '* holder of the type mentioned at the outset essentially *' j; 20 to improve that the opening edge of the container gets a * smooth, edge-free circumference to load the contents! j quem drink directly from the packaging container to keo ’rj whereby sealing the lid onto the packaging container is not difficult and with conventional machines * 1, j j 1 j» # '- 3 -

Equipment should be feasible unchanged.

This object is achieved in that the

The sealing edge on its outer circumference merges into a '5 lip edge folded downwards and towards the container wall, the width of the sealing edge and the shape of the container wall and the lip edge being coordinated with one another in such a way that the axial projections of the container wall and the lip edge Leave an annular free strip with 10 of sufficient width for a sealing abutment on the underside of the edge of the seal. !

In this way, on the one hand, the lip rim enables a comfortable |

Drinking the contents of the container directly from the packaging container, 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 mechanical devices by sealing a flat lid, as was previously used for closing the conventional packaging containers.

Insofar as the conventional sealing machines are equipped with very wide sealing abutments, such a wide sealing abutment can be brought to the width actually required by making a slight change, for example attaching an attachment or cutting a groove. One with a narrower repository, i --—- f //

I Λ I

- 4 - surface-formed sealing abutment also has the advantage that it can be slightly more elastically pressed into the underside of the sealing edge under the pressure exerted by the sealing tool on the lid and the sealing edge 5 and is therefore suitable for absorbing circumferential differences in thickness of the sealing edge and all around improve even sealing of the lid. Such a sealing abutment with an abutment surface limited to the necessary width can then be freely inserted axially from below 10 between the most radially projecting parts of the container wall and the lip edge to the underside of the sealing edge. Withdrawal of the sealing abutment from the underside of the sealing edge is also unimpeded. In other words: 15 packaging containers according to the invention can be closed in the same way in conventional closing machines if the width of the sealing abutment in these closing machines is "reduced to the necessary amount".

The er-20 packaging container according to the invention offers a wide variety of options for the formation of the lip edge, which can be selected depending on the application and request: for example, the lip edge can be conically narrowing downwards.

Another possibility is that the lip rim 25_ is curved so as to narrow downwards, where ^^ _ 5 - I », the concave side of the curvature is opposite the container wall.

The lip rim can also be at least almost closed

Roll flanged to the outer periphery of the sealing edge 5.

With all these possibilities, the lip rim can be produced in a simple manner. One has . only when forming the packaging container, the peripheral edge at the container opening is to be formed correspondingly wider and to form part 3 of this peripheral edge, namely the width beyond the desired width of the sealing edge in conventional edge flanging machines downwards towards the container wall. This method of manufacture can be carried out particularly cheaply if the lip edge has a smaller thickness than the sealing edge.

You can set the thickness of the lip edge between about 20 to 80% of the seal edge. This can already be provided when the packaging container is being molded.

'| A particularly advantageous embodiment of the packaging container according to the invention provides that the outer edge of the sealing rim is formed in an annular transition region to the lip rim with a reduced thickness. This annular transition region -6 _ on the underside of the sealing edge can be shaped into a receptacle for the lip edge, which is designed to be elastically compressible.

In this embodiment, the packaging containers according to the invention can be closed in any conventional closing machine by sealing a flat lid. If such sealing machines are equipped with sealing abutments, the abutment surface of which is only of the absolutely necessary width, then the sealing abutment can be freely inserted in the manner described above between 10 the most radially protruding parts of the container wall and the lip edge to the underside of the sealing edge. In sealing machines with an excessively wide abutment surface, the lip edge is then pressed elastically into the receptacle 15 formed on the underside of the sealing edge. The lip edge then forms a spring element which considerably improves the circumferential uniformity of the sealing pressure exerted by the sealing tool on the lid and the sealing edge, even if the sealing edge has circumferential differences in thickness.

20 Some embodiments are described below with reference to

Drawing explained in more detail. It shows: - 7 -

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

Fig. 2 is a partial section with a bottom view of the container edge corresponding to 2-2 of Figure 1, ver-5 enlarged;

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

Fig. 4 shows a second embodiment of area 3 of Figure 1 in the same representation as 10 Figure 3 and

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

The packaging container 10 shown in FIG. 1 is made in one piece from thermoplastic, for example

Polystyrene, or thermoformed from a laminate of various thermoplastic materials and is used for packaging drinking yoghurt. The cross section of the container 10 is circular. However, any other 20 cross-sectional shapes are also possible, for example elliptical

Cross-section, square cross-section, in particular square cross-section, partially circular rounded, for example circular, cross-section with a flattened side and the like. Starting from the container bottom 25, the peripheral wall 12 widens conically to // / 4 '* - "* l", "___ _ * _ 8 _ i, above and goes at the top into a counter-conical stack and Stabilizing edge 13 over. This i

The stacking and stabilizing edge 13 is at its upper end by a sealing edge lying in the essentially flat opening surface 5 of the packaging container 10! 15 completed. On the outer circumference, this sealing edge 15 merges in one piece into a lip edge 16 which, starting from the sealing edge 15, extends downwards and inwards with respect to the container axis. The transition from the sealing edge 10 15 to the lip edge 16 is designed in the form of an outer rounding 17 in order to allow the container edge to be conveniently attached to the lips of the user.

! j

Figure 2 shows a greatly enlarged section of a j

Section through the peripheral wall 12 and the bottom view!

15 of the container rim. The axial J can be seen in FIG

Projection 19a (projection in the sense 2-2 of FIG. 1) of the j; Container peripheral wall 12 and the stacking and stabilizing i f t | randes 13. Furthermore, the axial projection 19b of the lips--! edge 16 recognizable. Between the two axial projections! i j 20 19a and 19b remains an annular free strip 19.

i

In this annular free strip 19, a sealing abutment can be axially unhindered from below between the; | Container wall (stacking and stabilizing edge 13) and the.

| Lip edge 16 to the bottom of the sealing edge 15 l i>

Insert 25 and withdraw from there without hindrance. / J

_ // J

! ! f _ 9

According to the invention, this free strip 19 is formed in a width sufficient for the abutment surface of a sealing abutment.

In the example of FIG. 3, the lip edge 16 extends somewhat arched and narrows from the rounding 17

Outer circumference of the sealing edge 15 down. The concave side of this curvature lies opposite the container wall or the stacking and stabilizing edge 13, so that the convex side of the curvature faces outwards. In this 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 decreasing from the connection point to the sealing edge 15 or the rounding 17 towards the free edge.

As can be seen from FIG. 3, the abutment surface 23, which is limited to the necessary width, is formed on an annular elevation of the sealing abutment 20.

With this ring-shaped elevation, the sealing abutment 20 can be positioned between the most radially protruding one

Area of the stacking and stabilizing edge 13 and the * 20 narrowest part of the lip edge 16 lead unimpeded axially, leaving a considerable margin 23 '. The narrow design of the abutment surface 23 also ensures that the heat from the heated sealing tool 22 on the metal foil cover 18 and denw 't - 10 -

Seal edge 15 applied pressure on the entire circumference of the »

Sealing point is distributed practically evenly.

This is made possible by the fact that the abutment surface 23, which is only limited to the necessary width, presses somewhat elastically into the lower surface of the sealing edge 15 under the pressure exerted by the sealing tool 22.

After the cover 18 has been sealed onto the sealing edge 15, the sealing abutment 20 can again be pulled off axially without hindrance, i.e. lift the sealed container 10 axially out of 10 from the sealing abutment 20.

As shown in dashed lines in FIG. 3, the lip rim 16a can also extend purely conically downwards and inwards from the rounding 17 if this appears expedient or desirable for some reason.

In the example in FIG. 4, the packaging container differs from that in FIG. 3 only in that the lip edge 16b is flanged on the outer circumference of the sealing edge 15 as an almost closed lip roll. Also> this lip rim 16b, designed as a lip roller, allows 20 the axial access of a sufficiently wide abutment surface 23 of the sealing abutment 20 to the underside of the!

Seal edge 15 unhindered, so that the seal tool 22 exerted on the cover 18 and the seal edge 15 is '7' 1 * 1 1 1 1 1 "· - -" '-—'. - _______. t

»I

- 11 -!

Seal pressure is supported securely.

• I

In the example in FIG. 5, the sealing edge 15a is relatively thick-walled and 5 solid in an inner annular region which largely corresponds to the regions 19 and 19a in FIG. A transition region 25 of the sealing edge 15a adjoins this inner region radially outward, which is made substantially thinner and merges with the rounding 17 into the lip edge 15c designed as a lip roller. In the transition region 25, the upper side of the sealing edge 15a is continued in the opening plane of the container 10 and the reduction in thickness is produced by molding a receptacle 26 for the lip edge 16c, which may be bent. The width of the abutment surface 23 of the sealing abutment 20 is dimensioned in this example 15 so that the sealing edge 15a lies inwards with the underside of the receptacle 26 on the abutment surface 23 and the lip edge 16c in a ring formed in the sealing abutment 20 beyond the abutment surface 23. only takes hold. The packaging containers designed according to FIG. 5 can, however, also be sealed in such a way. close the machines, where a wide, up to

Recording 21 extending abutment surface is formed.

In such a case, the lip edge 16c lies on the abutment surface and is pressed resiliently into the lip edge receptacle 26 under the pressure / 1 - f - 12 - I '* i exerted by the sealing tool 22 25 on the cover 18 and the sealing edge 15a . The result of this is that the sealing edge 15a is pressed at least in its thinner transition region 25 under the spring action of the compressed lip edge 16c upwards 5 against the underside of the cover 18, which ensures that the pressure required for effective sealing is built up at all times. In this way, extensive fluctuations in the thickness of the sealing edge * 15a can be bridged safely and easily.

In order to insert the sealing abutment 20 with its narrow abutment surface 23 between the most radially projecting parts of the container wall, in particular the stacking and stabilizing edge 13 and the lip edge 16, 16a, 16b, 16c, in embodiments 15 according to FIG. 3 to 5, the sealing abutment 20 is equipped with a receptacle 21 which encompasses the sealing edge 15, 15a and the lip edge 16, 16a, 16b, 16c.

* The packaging container 10 is made of thermoplastic material, preferably by thermoforming from a band-shaped or plate-shaped plastic semi-finished product. Preferred materials are: polystyrene,

Polyolefins, polyester and laminate semi-finished products made from various thermoplastic materials. /> - t 1

Claims (8)

1. Packaging container made of thermoplastic material! in particular by thermoforming a film or plate made of thermoplastic plastic container, which has a substantially radially outward 5 above, the opening surface of the container surrounding, flange-like edge, on which a flat lid, preferably i, after filling the container Metal foil or metal foil with plastic coating, device to be sealed, 10 characterized in that the sealing edge (15) on j. ! its outer circumference via a rounding (17) into a j i downwards and towards the container wall (12, 13) i | | folded lip edge (16) merges, the width! (15 *) of the sealing edge and the shape of the container wall (12, 13) and the lip edge (16) are coordinated in such a way that the axial projections (19a, 19b) the container wall (12, 13) and the lip edge (16) on the underside of the sealing edge (15) y there an annular free strip (19) sufficient j 2. Packaging container according to claim 1, characterized in that the lip edge (16) is conically narrowing downwards. 3. Packaging container according to claim 1, characterized in that the lip edge (16) is formed so as to narrow downwards, the concave side of the curvature of the container wall (12, 13) being opposite. 4. Packaging container according to claim 1, characterized in that the lip edge (16) is crimped as at least almost 15 closed roll on 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) has a smaller thickness than the sealing edge (15). / I_Lj «^ _____ ^ ^ _ t - 15- Leave 5 width. 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) bt> -tr. 5 7) Packaging container according to one of claims 1 to 6, characterized in that the sealing edge (15) is formed on »its outer circumference in an annular transition region (25) to the lip edge (16) with a reduced gap. ^ 8) Packaging container according to claim 7, characterized in that the annular transition region (25 * on the underside of the sealing edge (15) is formed into a receptacle (26) for the lip edge (16) which can be elastically pressed on. Designs: ... ...... X ....... planches pages dont —A ........ paae de garde ι ..... AA ...... pages de description .... ...... pages de revendications —abrégé descriptif Luxembourg, le 2 8 JUIN 1982 * Le mandataire: // Charles München jii ——---- 1