DE3042209A1 - DISPOSABLE CONTAINER - Google Patents

Description

The invention relates to a disposable container with and without subdivision made of thin-walled material made of aluminum or aluminum compounds, especially for use as a meal tray and for storing food.

There are known such containers with a smooth bottom and pleated walls. The walls are provided with or without a rolled edge.

It is also known to have such containers to increase the rigidity with slightly inwardly curved side walls to manufacture.

It is also known to also emboss beads in the bottom of the container to increase the rigidity.

These known containers have several disadvantages. The so-called pleating process occurs when the container is formed the already mentioned pleated side walls, which are visually unappealing. With the known disposable containers a certain material thickness of about 5o may not be undershot in order to achieve the necessary stability reach. This makes the containers relatively expensive when

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you consider that it is only used once as a disposable container Find. It also shows that when using the minimum wall thickness mentioned (Sojun-j) the container are not very rigid and are relatively sensitive to pressure and shock.

The object of the present invention is therefore to design a container of the type mentioned at the outset in such a way that that while maintaining sufficient container rigidity, the material thickness can be reduced. Furthermore, the training should be done in such a way that the pleated folds in the known containers are not visually unsightly appear more.

This object is achieved by the design features specified in the characterizing part of claim 1.

The disposable container designed according to the invention has a considerably higher rigidity for the same material thickness than the corresponding containers known in the prior art. Provided that the stiffness is comparable, a much smaller material thickness can be used for the disposable container according to the invention. Have attempts shown that according to the invention designed container with a Material thickness of about 60 uir> about the same stability have like the previously manufactured containers with a material thickness of 80 µm. By the invention A material saving of 25% is thus possible for one-way containers, whereby the costs for the production are correspondingly can be lowered high. Through the design of the container

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with the three-dimensional embossed structure according to the invention they are less sensitive to pressure and shock than the known ones Container. The design according to the invention can also be produced in a special way that only requires additional effort Wall shapes (curvatures, etc.) are dispensed with, which were previously required to achieve the necessary rigidity. In principle, the container molding process creates also in the case of the container produced according to the invention, pleated folds. These are, however, superimposed on them, so to speak Embossed structure made to disappear. The pleats no longer appear optically, so that the Container also has a more attractive appearance on the outside.

Appropriate and advantageous further refinements of the object solution according to the invention are set out in the subclaims marked.

The embossed structure according to the present invention can, as specified in claims 2 and 3, by uniform or uneven depressions or elevations may be formed in the floor and wall material.

These depressions and elevations themselves can, as indicated in claim 4, geometrically regular or irregular be trained. The arrangement of the elevations and depressions can also, as indicated in claim 5, according to a predeterminable pattern or grid.

To further increase the rigidity of the inventive To achieve one-way container, can-. Basically, as indicated in claim 6, stiffening beads are provided. These stiffening beads are known per se in the manufacture of such containers. They "overlay" then, so to speak, the embossed structure according to the invention.

The manufacturing method of the disposable container according to the invention is simplified to a certain extent by the fact that the three-dimensional embossed structure according to the invention is already embossed on the metal foils that are used to produce the Containers are used as shown in the. Claim 7 is indicated.

The impression of the three-dimensional according to the invention However, structure can also take place in the case of the fully formed container, as indicated in claim 8.

The invention will now be explained in more detail with reference to the accompanying drawing, in which exemplary embodiments are shown will.

Show it
. Fig. 1 shows a conventional container shape in section

without subdivision,

2a and b cross sections through pieces of material of the floor or the wall of the container according to FIG. 1, and FIG. 3 shows a piece of material from the container according to FIG 1 with a structure according to FIG. 2 and an additional stiffening bead.

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Fig. 4 is a representation similar to that according to

Fig. 2 with regularly formed impressions (depressions) and

Fig. 5 shows a representation similar to that of FIG. 3 with a uniformly arranged Embossing structure.

In the figures, the same components are provided with the same reference number.

1 shows a section of a container 2 which has a bottom 4 and a side wall 6. The side wall is provided with an outwardly pointing edge 8 which has a rolled edge 1o.

2a shows a greatly enlarged sectional view of a base or wall section 12 of the container 2 Fig. 1 with an embossed structure 14, which consists of embossed irregular There are depressions 16, which are represented as elevations 18 on the opposite side.

FIG. 2b shows a view similar to FIG. 2a, in which the embossed structure 14, however, consists of embossed irregular ones There are elevations 2o, which are represented as depressions 22 on the opposite side.

Fig. 3 shows schematically another embodiment of the material of the container, in addition to one Embossed structure 24, which corresponds to the structure according to FIG. 2, larger-sized beads 26 provided for further stiffening are, so to speak, "superimposed" on the finer embossing structure 24.

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The embossed structure 14 or 24 is shown in FIG. 2 as an irregular structure, both in terms of the distribution as well as the shape of the depressions or elevations. However, the structure can also be formed be by geometrically uniform elevations or depressions, see Fig. 4, which in turn are irregular or uniform can be arranged in the form of a specific pattern or grid, see FIG.

The embossing of the structure 14 or 24 takes place already in the metal foil semifinished product provided for the manufacture of the containers for example by means of suitable embossing rollers or, after the container has been produced, by a special one Embossing tool in a subsequent work cycle.

Claims (8)

PATENT LAWYERS Dlpl.-Ing. Slgurd Leine · Dipl.-Phys. Dr. Norbert König BurckhardtslraSe 1 phone (0511) 62 30 , D-3000 Hannover 1 Our sign date Gerd Wachsmuth 564/1 October 31, 198c Protection claims f 1.) Disposable container with and without subdivision made of thin-walled material made of aluminum or aluminum compounds, in particular. For use as a meal tray and for storing food, characterized in that the bottom (4) and / or the walls (6) of the container (2) are provided approximately over the entire surface with a three-dimensional structure (14, 24) embossed on the floor and wall material. 2. Container according to claim 1, characterized in that the embossed structure (14) is formed by a plurality of evenly or irregularly arranged depressions (16) in the floor and wall material. 3. Container according to claim 1, characterized in that the embossed structure (14) is formed by a plurality of uniformly or irregularly arranged elevations (2o) in the floor and wall material. 4. Container according to claim 2 or 3, characterized in that Dr.K./H. ^ _n -2- ORtGiNAL INSPECTED I · »· # «· Ir · ·« I * · · ·
I · ■ «· · • · · · · that the depressions (16) and elevations (2o) themselves one have geometrically regular or irregular shape. 5. Container according to one of claims 2 to 4, characterized in that the elevations and depressions are embossed according to a predeterminable pattern or grid. 6. Container according to one of the preceding claims, characterized in that in addition to the embossed structure (14, 24) known stiffening beads (26) are arranged in the bottom and / or in the walls of the container. 7. Container according to one of the preceding claims, characterized in that the three-dimensional embossed structure (14, 24) is already embossed into the metal foils fed to the container forming station by means of corresponding embossing rollers. 8. Container according to one of claims 1 to 6, characterized in that the embossing of the three-dimensional structure (14, 24) in the finished-shaped container takes place after passing through the molding station by means of a corresponding embossing tool.