EP0621189A2 - Canister and method for producing the same - Google Patents

Abstract

The canister has a wall part (6) between a foot part (2) and a head part (4). In a front or rear half of the canister, a middle fold line (12) and on both sides thereof a lower fold line (14) and an upper fold line (16) are arranged, each of which extends over half the narrow side to the main median plane (18) of the canister and are each bead-shaped, making it easier to fold the canister.

Description

The invention relates to a canister according to the preambles of claim 1 and claim 8 and a method for producing the canister according to the preamble of claim 10.

From CH-PS 622 750 a canister according to the type mentioned in the preamble of claim 1 is already known, in which the fold lines are formed by bead-like ribs which run on the one hand along the main median plane of the canister and on the other hand in one half transversely to the main median plane about a quarter or three fourths of the height of the canister. The bead-like, rib-shaped fold lines are difficult to achieve in terms of production technology and impair the appearance of the canister because they protrude beyond the surfaces and make labeling and decorating difficult on the broad side. On the other hand, the canister is difficult to fold, since the bead-like, rib-shaped folding lines only make the folding process to a limited extent, at best in the initial phase and more difficult in the final phase.

A canister of the type mentioned in the preamble of claim 8 is known from EP-PS 0 274 742. It is disadvantageous that residues of the contents remain in the blown-out hollow handle part, which is undesirable. In order to avoid these disadvantages, it is known from DE-OS 37 22 691 to no longer design the handle part as hollow, but with a full, double-T-shaped cross section. Such a grip part has a relatively sharp-edged profile, which complicates the handling of the canister.

The object of the invention is to form a canister of the type mentioned so that the disadvantages mentioned are avoided.

• a) den Kanister gemäss Anspruch 1;
• b) den Kanister gemäss Anspruch 8;
• c) das Verfahren zur Herstellung des Kanisters nach Anspruch 10.

According to the invention, the object is achieved by:

• a) the canister according to claim 1;
• b) the canister according to claim 8;
• c) the method for producing the canister according to claim 10.

The fact that the fold lines of the foldable canister are designed as beads not only results in an appealing exterior of the canister, but above all it also makes folding easier, since the beads do not hinder the folding, but instead support this process. In addition, the folding is further facilitated by the middle fold line, which is located approximately halfway up the canister. By restricting the arrangement of the fold lines to the narrow side of the canister, the broad side remains free for labeling and decorations.

Advantageous embodiments of the canister are described in claims 2 to 7.

To facilitate the folding of the canister according to claim 6, an embodiment according to claim 2 is preferred. A further development according to claim 3, which supports a Z-shaped folding of the wall part according to claim 7, is particularly advantageous.

It is fundamentally possible for the canister to have an oval or polygonal cross section. An embodiment according to claim 4 is particularly advantageous Corners also give the container a particularly good stability, which is further supported by a concave curvature of the flattened corners, so that the canister can be made with a very small wall thickness despite the foldability, which in turn leads to material savings. The stability and in particular the labeling and decorability of the canister can be improved according to claim 5.

The simplest folding results from claim 6, in which case the head part and the foot part are then folded towards one another in the opposite direction. The development according to claim 7 enables a further, Z-shaped folding of the folded canister, so that the foot part and the head part lie one above the other in the original orientation of the canister and the remaining part of the canister is Z-shaped.

When the canister is designed according to claim 8, squeezing the ends of the hollow handle part together ensures that the contents of the canister cannot get into the handle part and thus no residues form when emptied. Nevertheless, the grip part is hollow in the area between the bruises and therefore has a rounded cross section, which makes handling easier. It is particularly useful if the canister is designed according to claim 9, whereby the stackability of such canisters is known to be easier.

The manufacture of the canister is preferably carried out according to claim 10, in that a vacuum is applied to the blow mold for the handle part in the usual blowing process for the manufacture of the canister, whereby the hollow handle part is formed.

The canister according to the invention is characterized by an optimal shape, which enables sufficient strength properties of the canister despite the reduction in the use of raw materials in the manufacture. The canister can be used as a single-use or reusable container and, if necessary, can be disposed of inexpensively by folding and the associated volume reduction.

Figur 1

einen Kanister in Ansicht auf die Breitseite;

Figur 2

den Kanister der Figur 1 in Ansicht auf die Schmalseite;

Figur 3

den Kanister der Figur 1 im Schnitt III-III der Figur 1;

Figur 4

den Kanister der Figur 1 in einer ersten Phase des Faltvorganges;

Figur 5

den Kanister in gefaltetem Zustand;

Figur 6

den Kanister in einer weiteren Faltmöglichkeit;

Figur 7

den Kopfteil des Kanister der Figur 1 im Schnitt VII-VII in einem Blaswerkzeug.

Exemplary embodiments of the invention are described in more detail below with reference to the drawings, in which:

Figure 1

a canister in view of the broadside;

Figure 2

the canister of Figure 1 in view of the narrow side;

Figure 3

the canister of Figure 1 in section III-III of Figure 1;

Figure 4

the canister of Figure 1 in a first phase of the folding process;

Figure 5

the canister when folded;

Figure 6

the canister in a further folding possibility;

Figure 7

the head part of the canister of Figure 1 in section VII-VII in a blowing tool.

The figures show a canister with a foot part 2, a head part 4 and an intermediate wall part 6. In the example shown, the canister has a rectangular cross section with flattened corners 8, which is shown in FIG Way are concave. The wall part 6 is at least slightly set back relative to the foot part 2 and head part 4. On the narrow side, the walls 10 contain bead-shaped folding lines 12, 14, 16 which extend in one half of the canister from the main median plane 18 over the corners 8 to the wall 20 of the broad side of the canister. The middle bead-shaped fold line 12 is arranged approximately halfway up the canister. The lower fold line 14 and the upper fold line 16 are each at a distance from the top and the bottom of the canister which corresponds to approximately half the width of the canister. On the side of the canister opposite the middle folding line 12 there is a further analog folding line 17, indicated by dash-dotted lines, which enables the canister to be folded in a Z-shape (see FIG. 6).

The canister contains on its head part a recessed grip 22 with a hollow grip part 24. In addition, the filler neck 26 is arranged in the recessed grip 22. At the upper edge of the recessed grip 22 there is a stacking surface 28 with locking lugs 30, so that the same canisters can be stacked one above the other. For this purpose, the foot part 22 contains a recess 32 into which the parts of the handle part 24 and the filler neck 26 projecting beyond the stacking surface 28 can engage.

Figures 4 to 6 show different stages of folding the canister. By pressing in the canister on the wide side at the level of the middle folding lines 12, the canister is bent, as can be seen from FIG. Then the foot part 2 and the head part 4 can be folded against one another, so that the folding configuration shown in FIG. 5 results. This reduces the original volume of the canister by up to 85%.

The folding configuration of Figure 5 is relatively large. Should it be desirable to obtain a small-area folding body, the folding body of FIG. 5 can be folded back again, as can be seen from FIG. 6, whereupon the foot part and the head part are practically parallel one above the other and the middle wall part is folded in a Z-shape.

As can be seen from FIGS. 1, 2 and 7, the grip part 24 is hollow and squeezed together at its two ends facing the canister, so that at these pinch points 34, 36 there is a medium-tight seal with respect to the interior of the canister. Suitable for producing the handle part 24 is the blow tool 38 shown in dash-dot lines in FIG on the wall of the mold recess 42.

The canister can be made from the usual materials such as polyethylene, polypropylene and so on, which are either recyclable and / or environmentally friendly. The can shape can be made particularly light by the present design, so that considerable material savings result.

REFERENCE SIGN LIST

2nd

Foot part

4th

Headboard

6

Wall part

8th

corner

10th

wall

12th

Fold line

14

Fold line

16

Fold line

17th

Fold line

18th

Main middle level

20th

Wall (broadside)

22

Recessed grip

24th

Handle part

26

Filler neck

28

Stacking area

30th

Locking lug

32

deepening

34

Pinch point

36

Pinch point

38

Blowing tool

40

Vacuum line

42

Mold recess

Claims (10)

Canister, with a wall part (6) arranged between a head part (4) containing a filler neck (26) and a foot part (2), which has folding lines (12, 14, 16) for folding the canister in a front or rear half of the canister characterized in that the fold lines (12, 14, 16) are formed as beads which extend from the broad side (20) of the canister over half the narrow side (10) to the main median plane (18) of the canister, a central fold line (12 ) is arranged approximately halfway up the canister, to which an upper fold line (16) and a lower fold line (14) are assigned, which are located in the upper and lower half of the canister. Canister according to claim 1, characterized in that the upper and lower fold lines (16, 14) each have a distance from the top and bottom of the canister which corresponds approximately to half the width of the canister. Canister according to claim 1 or 2, characterized in that it has a fold line (17) corresponding to the middle fold line (12) on the canister half facing away from the fold lines (12, 14, 16). Canister according to one of claims 1 to 3, characterized in that the canister has a polygonal cross-section, the corners (8) being flattened and preferably concave and the fold lines (12, 14, 16, 17) flattened beyond the associated ones Extend corners (8). Canister according to one of Claims 1 to 4, characterized in that at least the walls (20) of the broad side are set back inwards relative to the head part (4) and the foot part (2). Canister according to one of claims 1 to 5, characterized in that it can first be folded in around the middle fold line (12) and then the head part (4) around the upper fold line (16) and the foot part (2) around the lower fold line (14) are foldable against each other. Canister according to claims 3 and 6, characterized in that it can be folded in a Z-shape around the additional further folding line (17) on the other half of the canister. Canister with a wall part (6) arranged between a head part (4) and a foot part (2), the head part (4) having a filler neck (26) and a hollow grip part (24), characterized in that the grip part (24) is squeezed together at its ends (34, 36) facing the canister. Canister according to claim 8, characterized in that the handle part (24) is arranged in a recessed grip (22) of the head part (4). A method for producing the canister according to one of claims 8 or 9, wherein the canister is produced in the blow extrusion process, characterized in that a vacuum is applied to the handle part (24) of the blow tool when blowing the canister.

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