DE1065265B - Containers for liquids - Google Patents

Description

fir * 2Q

BUNbESRt) PUBLIC OF GERMANY

GERMAN MmL PATENT OFFICE

KL.-SiT

INTERNAT. KL. B 31 d

SUPPLY 1 065 265

E15142VII / 54f

REGISTRATION DAYi DECEMBER 24, 1957

BER N

AND ISSUE DEIl

LEGISLATION: SEPTEMBER 10, 1959

The subject of the invention is a cardboard container lying flat in the empty space, preferably Corrugated cardboard, for liquids, pastes and powdery bulk goods.

The endeavor ¹ of technology and trade to reduce the packaging costs for storage and transport of consumer goods is increasingly leading to the use of packaging made of cardboard, including for purposes where previously other materials such as wood, metal, plastic and the like. Like., were used. Because cardboard packaging is not only cheaper than that made from other materials previously used, but because of its cheap price, in many cases it enables the packaging to be discarded after a single use, i.e. saving the costs of returning the empty packaging. In this case, one speaks of "one-way packaging". For the reasons mentioned, efforts have been made for some time to create such disposable cardboard packaging for liquids and powdery bulk material. While smaller containers made of coated paper, for example for milk, have become known, it has not been possible to date, despite all relevant efforts, to create larger, thick-walled liquid containers made of cardboard that would be suitable for the transport and storage of larger amounts of liquid. Because it is obvious that quite different and significantly higher demands are made on such a container than on other cardboard transport containers. When knocking and throwing containers filled with liquids, it is known that extremely high local stresses occur which tend to deform or even destroy the container. The risk generated by this is particularly high with liquid contents, because on the one hand it is often very valuable content, for example in the case of vegetable oils, and on the other hand, if a container is destroyed, the contents leak and damage other goods in the vicinity. A liquid container must on the one hand be mechanically particularly strong, on the other hand it must be absolutely impermeable to liquids and, finally, should also be easy to stack and handle. Because of these special requirements, containers known for other purposes cannot simply be used as liquid containers.

Various cardboard containers, including corrugated cardboard, intended for liquids are already known. However, without exception, these known containers do not meet the requirements outlined above sufficiently fair. Usually, liquid containers made of cardboard consist of the actual container shell, the container for liquids made of smooth cardboard or corrugated cardboard

IO

Applicant:

Waldhof pulp mill,
Mannheim-Waldhof, Sandhöfer Stf. 156

Heinz Failer, Oldenburg (Oldbg.),
has been named as the inventor

15th

can be manufactured, and from an insert made of liquid-tight plastic films or coated liquid-tight Paper. The known liquid containers of this type are invariably square. It is on

It is obvious that such containers are filled when they are stacked on top of one another, especially when they are stacked numerous containers on top of each other, very high risk of bulging or crushing of the lower container by the weight of the

who are exposed. In addition, of course, the flawless introduction of the liquid-tight insert prepares which should ideally fill the entire space as possible in order to protect it against tearing when filled to be, difficulties, especially for one

Wall-free closure of the base and headboard provided must become. This results in the additional problem that the filling opening only after filling, that is, to be closed by the user of the container must, which often if possible also through inadequate

trained forces is to be carried out. A further complicating factor is that the container if possible should be transported from the manufacturer to the user in a flat state, otherwise they are undesirable take up large cargo space. All

these conditions are only imperfectly fulfilled by the known square containers. So had for example, to form the head and bottom parts of the insert, this is designed so that it is in lying flat in triangular shape from derri

Coat protruded. This enables lying flat transport. When setting up the container The insert on the head and floor is stretched in a square shape due to the tension that occurs flat. Here, however, step in the top one

At the top of the original triangle, considerable savings are made, because the material is moved out of its natural direction, and these tensions ¹ easily lead to damage to the insert at this point. That it is triangular in such containers

Outstanding stakes over the coat were possible and known to be one in the top of the stake Provide a filling opening which could be closed in a simple manner by heat sealing although quite expedient, the other disadvantages of the known containers could not be eliminated or outweigh.

It has now been found that the above requirements are met by a container lying flat in empty shipping Made of cardboard, preferably corrugated cardboard, for liquids, pastes and powdery bulk goods with a hermetically sealable paper insert that protrudes beyond the edge of the jacket, preferably coated paper, film or the like, which corresponds to a triangular cross-section, can be closed by inserting bottom and cover inserts that can be connected to the casing edges Has filling space and an insert, the head and bottom parts of which are in a ready-to-use state when opened, form a rhombus in plan view. This container has to all known the the following advantages, some of which are unexpected:

1. The triangular shape of the container according to the invention enables particularly good stackability, of the isosceles triangle, represent the bottom or head part of the insert when filled.

The container jacket is preferably made from a single cardboard blank so that it is in the Horizontal section has the shape of an isosceles triangle. It is expediently designed in such a way that that the insert fits exactly. This is then glued to the container on all inner sides, which can be done over the whole area or also only in the form of points and stripes. The cut of the container is expediently designed so that it has three crease lines, one of which is ready for use State two face each other, while the third is through the end edges of the cut formed joint is opposite. This is closed after the insert has been glued in, expediently by means of an adhesive strip. The container can then be transported lying flat and simple Print on the two opposite crease edges in ready-to-use condition to be brought. The top and bottom parts of the insert then represent rhombuses, which are separated by a center line in two symmetrically isosceles triangles

15th

g g pg

since the triangular containers are separated alternately in each case. The center line corresponds to that of the base with surface or edge downwards or upwards inein- d lihhkl Dik dlld Si

wedged on the other, stack completely filling the space. Above all, this is also the decisive factor The advantage achieved is that a considerably more secure stacking is made possible than with square or round containers, because the forces occurring evenly through the sloping walls of the individual Containers are included that protect each other against bulging or crushing.

2. The manufacture of the container has surprisingly proven to be particularly simple and material-saving proven.

3. When empty, the container can be transported lying flat and can also be used by untrained people Bring forces into the state of use easily, simply and safely, as well as filling and emptying.

4. Surprisingly, the container according to the invention has over all known containers when filled, particularly high strength and security against shock loads, for example when throwing. Presumably this is due to the fact that the protruding When folded down, the top and bottom parts of the insert form air cushions that have a double relationship serve as a shock buffer - once by compressing the air in them, for other than a springy air cushion against the contents of the bag -.

The protruding parts of the insert have a triangular shape and each have a single continuous seam. This is expediently closed by gluing or heat sealing, in the case of the bottom part already during manufacture, and in the case of the head part after the container has been filled. The container can be emptied by simply cutting off the protruding corner of the triangle. The insert is expediently formed by folding over a piece of paper and gluing or sealing the seams. The insert is preferably designed so that the flat head and bottom parts protruding beyond the container blank in plan view with the upper and lower edge delimitation lines of the finished container on one side an angle α of 90 ° and on the other side an angle β • Form which is half the size of the vertex angle of the isosceles triangle representing the side of the container. An isosceles triangle closes the bottom or (when filled) the head of the insert. The other isosceles triangle protruding from the container can now be folded symmetrically onto the first one.

The container is expediently closed at the top and bottom by triangular cardboard blanks, the hinged ones Wear straps with which they are connected to the container walls. These closures can take the form of lids that are placed on top and bottom of the container. To do this, you can connect the folding flaps beforehand, for example by using adhesive strips at their corners, so that tightly fitting lids are formed. But you can also, for example, through the tabs Connect the adhesive to the container walls. However, the closure parts are expediently at the top and pushed into the container at the bottom so that the tabs are attached to the inside of the container walls Lay in the direction of the openings. You can then use the walls, for example Gluing or stapling.

An example embodiment of the invention is shown in the drawings. In

Fig. 1 shows the items, furthermore a container in the flat state, while in

Fig. 2, 3 and 4 ready-to-use containers are shown.

In the figures 1 is the cardboard blank, 2 the base or cover, 3 the insert, 4 its opening, while 5 shows the seal seam of the insert. 6 is the closure strip over the open joint of the Container.

Fig. 2 shows a container with the top and bottom parts of the insert unfolded so that half of the rhombus protrudes beyond the container. A position of the is shown in dashed lines protruding end of the head part indicated when closing. Fig. 4 represents the container after for emptying this part is opened again and its tip is cut off, so that an emptying opening originated. Fig. 3 in turn shows a container ready for use and with

closed insert before inserting the separately shown cover for head and bottom parts.

Claims (6)

Patent claims: 1. Flat-lying cardboard containers, preferably corrugated cardboard, for liquids when sent empty, Pastes and powdery bulk goods, with a hermetically sealable, over the jacket edges Outstanding insert made of paper, preferably coated paper, foil or the like, ge ίο characterized by a triangular cross-section, which can be pushed in and with the jacket edges connectable bottom and lid inserts lockable filling space and an insert, its top and bottom parts in the ready-to-use state unfolded in plan view about one Form a rhombus. 2. The empty container lying flat according to claim 1, characterized by an insert, which has a single continuous seam and its head and bottom parts in ready-to-use When unfolded, in plan view each form a rhombus, which is in the middle by a Fold line is divisible into two symmetrical, isosceles triangles, one of which is the immediate Completion of the insert showing an isosceles triangle in the horizontal section results, while the other are folded on the first before closing the container jacket can. 3. In empty shipping subsequent container according to claim 1 or 2, characterized by a Use, whose protruding over the jacket edges of the flat-lying container with the The edge of the jacket forms an angle of about 90 ° on one side and an angle on the other side form which is half the size of the angle of the rhombus enclosing the seam of the insert, which the top or bottom part of the insert forms in the ready-to-use state in plan view. 4. In empty shipping flat lying container according to claim 1, 2 or 3, characterized by a made from a single cardboard blank, on which the insert on all inner walls is attached by gluing. 5. The empty container lying flat according to claim 4, characterized by one of one rectangular cardboard blank with three crease lines, from its crease lines When ready for use, two face each other, while the third is the one from the End edges of the blank formed, preferably closed with an adhesive tape joint opposite, so that the flat transported container for use only by a pressure can be brought into the finished form on the two opposite creases. 6. The empty container lying flat according to one of the preceding claims, characterized through base and lid inserts each made of triangular cardboard blanks, which are conveniently connected to the inside of the container by hinged edge strips, their marginal edges preferably pointing outwards. Considered publications:
German Patent No. 97,928;
German utility model No. 1 721 179;
French Patent No. 1,130,835;
U.S. Patent Nos. 2,516,820, 2,493,337,
339 156. 1 sheet of drawings 1 909 627/43 9.59