EP0694478B1 - Cup-shaped container - Google Patents

Abstract

The transition in the area of the container corners is formed with a larger radius, than in the area of the sidewalls (3,4,5,6). The different radii (7) located behind each other, merge into each other. The sidewalls extend upwards at an outward angle. An outward directed step (10) is located at the transition from the radius concerned, to the sidewall resp. corner area. The base (2) has a mainly oval cross-section. <IMAGE>

Description

The invention relates to a cup-shaped container which in Thermoforming process from a flat film with a non-round cross-section is produced, with a bottom and side walls rising from it, whereby the transition between the floor and the side walls is arched is formed and the transition in the area of the container corners with a larger radius is formed than in the area of the side walls.

Such a container is known from DE-1 193 865.

When manufacturing such containers arise in the area of the transition between floor and side walls especially in the area of the container corners Thin spots that force a relatively thick starting film use.

The invention has for its object a container of the type mentioned to design that such thin spots are largely avoided.

This object is achieved in that the radius of curvature in the area of the side walls 1/5 to 1/10 of the wall height and in the area of corners between the side walls are ½ to 1/3 of the wall height, and that the bottom has a substantially oval cross section and the in Different radii lying one behind the other continuously merge.

This makes it possible to produce a relatively thin starting film of the container, as it is distributed very evenly during deep drawing becomes.

It is also very favorable if, according to a further embodiment Invention the sidewalls from bottom to top directed obliquely outwards run.

A further advantageous embodiment of the invention is then that Transition from the respective radius to the side wall or to the corner area one by one external stage is provided.

This step prevents the flow of material from the side wall into the curved one Area not, so that an even material distribution is achieved becomes. However, it brings a very advantageous stiffening for the container, which ensures optimal container rigidity even with very thin material becomes.

Fig.1

eine Draufsicht auf einen becherförmigen, im Querschnitt rechteckigen Behälter, der mit einem umlaufenden Flanschrand versehen ist,

Fig.2

eine teilweise aufgeschnittene Ansicht der Längsseite des Behälters,

Fig.3

eine Ansicht der Schmalseite des Behälters und

Fig.4

einen Vertikalschnitt durch den Bereich einer Behälter-Ecke.

The invention is illustrated in the drawing using an exemplary embodiment. Show:

Fig. 1

1 shows a plan view of a cup-shaped container with a rectangular cross section, which is provided with a circumferential flange edge,

Fig. 2

a partially cut-away view of the long side of the container,

Fig. 3

a view of the narrow side of the container and

Fig. 4

a vertical section through the area of a container corner.

1 in the figures is a cup-shaped, in essentially rectangular container called one Bottom 2 and side walls 3, 4, 5, 6 rising from it has, the lying between the side walls Corners are rounded. The transition from the floor to the four Side walls are made with a radius of curvature (arrow 7), which is about 1/5 to 1/10 of the wall height H. In the area which is corners between the four side walls also a rounding to the bottom 2 is provided, the However, the radius of curvature (arrow 8) is significantly larger and is about 1/2 to 1/3 of the wall height H. Through this The bottom is given the design of the radii of curvature 7 and 8 2 an oval shape, as shown in Fig.1. The Stability does not suffer from this floor training, however, the one that occurs in deep drawing Material rejuvenation in the corners is considerably less than with an approximately the same radius of curvature over the entire scope. This makes it possible to use the slide select thinner overall and therefore a significant one To achieve material savings.

The different radii of curvature between the ground and Side walls on the one hand and between floor and corners on the other hand, they merge continuously, so that here too there are no thin spots during deep drawing.

At the transition between the side wall or the corner area and the curved area adjoining the floor a stage 10 is provided which the in Fig. 2 u. 3rd has visible course and to stiffen the Serves container.

Claims (3)

1. Tub-like container (1) that is produced by the thermoforming process from a cast film with a non-round cross-section, with a base (2) and side walls (3, 4, 5, 6) that extend upwards from the same, where the transition area between the base and the side walls is curved and where the transition area has a larger radius (arrow 8) in the area of the container comers than it does in the area of the side walls (3, 4, 5, 6), wherein the radius of curvature in the area of the side walls (arrow 7) amounts to 1/5 to 1/10 of the height of the walls while it amounts to 1/2 to 1/3 of the height of the walls in the area of the corners located between the side walls (arrow 8) and wherein the base (2) has an essentially oval cross-section and the different radii (arrows 7 and 8) that are provided behind each other in the circumferential direction merge gradually.
2. Container according to claim 1, wherein the side walls (3, 4, 5, 6) extend obliquely outwards from the bottom to the top.
3. Container according to claim 1 or 2, wherein a step (10) that points outwards is provided at the point of transition between the radius (7, 8) and the side wall or the corner area.

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