DE7431938U - Prismatic container with lid - Google Patents

Description

Dlpl.-lng. Heinz Bardehle

Patent attorney

8 weeks 22, Herrosir. 15, Tel. 29 25 55 Postonschrift München 26, Postfach 4

Munich, September 23, 1974

My reference: G 2021
Applicant: Elopak a / s

343Ο SPIKKESTAD / Norway

Prismatic container with lid

The present invention relates to a prismatic container with a lid.

For milk and similar dairy products, containers are known which consist of a coherent piece of processing that is folded along grooves are manufactured, which is shaped into a container with a square bottom and mainly flat, parallel side walls and is welded. The processing piece is made from cardboard sheets, which can optionally be laminated with an aluminum foil, and on both sides with a thin layer of thermoplastic Are covered with plastic. The webs are provided with pressure, creased to form weakened fold linesii and flattened Processing pieces punched out. The finished punched processing pieces are combined to form a sleeve soniorm using the plastic covering welded and delivered in flat condition to the producer of the contents, d (> r erects the container and heats the bottom sealed. After filling, the containers are at the top

heisa sealed, resulting in a completely filled unit, which is ready to be shipped and sold.

The top is closed by pressing the top part of the container, which forms connected closure parts or flaps along its side edges, to form a gable top with a towering ridge that is welded by pressure and heat . By tearing open the ridge over half its length, the upper part can be molded into a single piece. As a result, such gable-top containers are well suited for low-viscosity goods such as orange juice and milk. Viscous goods such as yogurt, jam and the like. And relatively compact goods such. B. Butter, however, can be cumbersome to bring out of the containers, even if the ridge is along its entire length

after being torn open as the fastener parts that make up the upper part can often be in the Wejje.

This problem does not exist in the case of containers with lids which expose the entire container cross-section. Known containers however, with lids have various other disadvantages. Prismatic Containers usually have lids that are glued, heat-sealed, or the like. Are held on the container, while with round containers usually folds, flanges, collars or the like. are formed, with which the lid can come into elastic locking engagement. Such folds that are made after the containers have received their final volume, require vert_ · ι: ". '■ -Uf <Jp - \ - r ..-. Ti'jn.in. Such Ben-older are usually tired of embellishment factories and require a large volume for storage and shipping.

An object of the invention is to provide a simple and inexpensive container which allows use of existing devices for gable top containers, and which can be closed by a lid that does not need to be welded or glued, provides sufficient sealing for viscous goods and gives up can easily be removed and replaced several times.

This can be achieved by using a prismatic cardboard container of the same construction as the usual ones as the container Glass container is applied, apart from the fact that it is instead of the

to have upper. Closing parts for the formation of the gable closure ^ 'very simple is just cut off at the top, and that the edge of the lid has a groove with a narrow, inverted U cross-section, which can be placed directly over the opening edge of the container. Sine right now however, the cut off top would result in the cardboard rial is not protected here by the plastic covering with which the cardboard is otherwise covered on both sides. this leads to in connection with certain material, e.g. B. fatty substances such as butter and the like., Which gradually over a certain period of time are used up, with the result that the container looks unappealing due to discoloration of the cardboard, by allowing the contents of the container to penetrate the cardboard at the edges.

It is thus also an object of the invention to provide a container of to create specified type, in which the opening edges against the Exposure to the content are protected.

This is achieved by doubling the cardboard at the opening by bending 18Ο to make a flat fold is placed, which on the outside of the container by welding the facing plastic coverings is held. The unprotected edge of the cardboard piece is made this way Get sufficiently far down the outside of the container that you usually do not get away from the contents of the container when using the "- ~ same to be influenced. . The flat fold becomes an entire Thickness of about twice the thickness of the piece, which can be about 0.4 mm, for example. Such a fold can be on the flat machining piece are formed before this to the sleeve shape is welded together. The processing piece can in its entirety with ordinary equipment for gable container pieces getting produced.

The flat fold also has the advantage that its free lower edge forms a small undercut that can be held in place the lid is sufficient.

The container provided with a lid, according to the invention is thus characterized in that the container from a tariff Grooves bent, connected processing piece produced is, which consists of plastic-coated cardboard and a container with a polygonal, preferably square bottom and mainly flat, parallel string walls and an upper opening where the piece of cardboard is doubled by bending over 180 ° to form a flat fold, which through the outside of the container Welding of the plastic coverings facing each other is held, gefojnfrt and welded that the edge area of the Lid has a groove with a narrow inverted U-section that directly can be placed over the opening edges of the container, and that a shoulder is formed in the outer wall of the groove, which with the free lower edge of the bent fold area cooperates.

Further features and advantages of the lidded container according to the present invention will be apparent from the following Description with reference to the drawing.

Fig. 1 is a perspective ^ iss of an embodiment of the container ice according to the invention with a lid.

Fig. 2 shows a section on a larger scale through the Edge of the container with lid according to Fig. 1.

The container 1 shown in the drawing has a rectangular one Bottom made by bending and welding bottom parts in a way that can be used in conjunction with ordinary gable top containers for milk and the like. Is formed. The walls of the container are straight and parallel. The processing piece for The container is made of cardboard and can be covered with a thin layer of aluminum foil be provided to increase the oxygen tightness. The processing piece is covered with plastic on both sides. It can have a total thickness of approximately 0.4-0.5 mm. To

After punching and grooving the piece, a 2-5 mm wide part of the edge, which forms its inner edge when the container is erected, is bent 18O against the side of the piece that represents the outer side of the container and welded to this side To form a flat fold 3 ¹ on the outer surface of the container. ^T Mn

cut, unprotected upper edge 3 'of the container is aui. " in this way remain on the outside of the container a little below the opening edge Z and at the same time an undercut Represent a paragraph for holding the lid 4, as will be apparent from the following.

The cover 4 has an edge region 7 with a groove 6 with a narrow inverted U-cross section, which is placed directly over the opening edge Z of the container. In the outer wall 5 of the groove 6 a shoulder 8 is formed which engages under the shoulder 3 "of the I-'alzes 3 ^1. The inner wall 5 'of the groove ό has the shape of a truncated pyramid surface. This makes it easier to insert the opening edge Z into the groove 6. The outer wall ^ 5 of the groove 6 ends in a curved, narrow loop 9, which also serves to facilitate insertion of the opening edge Z into the groove ό and also serves as a gripping edge when removing the lid from the container When the cover is put on, the lower part of the outer wall 5 of the Nnt 6 will rebound. ; U -Q'ie r cut, Ί. H. ... r. U: a: ·. · "Κ · η '-V ₁ (I.- eier ' .V: ir \ c 5 ', connected. The cover will therefore protrude a little into the container 1. The middle part II of the cover L is, however, at the level of the upper edge of the edge area, ie the yoke part 12 of the U-cross section vf pressed. As shown in FIG. 1, the elevation 11 in the illustrated embodiment has mainly the same outline shape as the container 1. The elevation 11 stiffens the lid substantially and forms with the edges 12 of the lid 4 a solid base for containers that are placed on top of one another be stacked.

To put on the cover 4, the contiguous circumferential groove 6 in the edge region 7 is guided down over the protruding free edges Z of the fold 3 ¹ . The shoulder 8 of the lid is pre-pressed against the shoulder 3 ″ of the folded part 3 '. This creates a locking effect between the lid and the container Furthermore, the fold 3 'can be produced while the processing piece is lying flat, ie before it is glued together to form a sleeve. The square cross-section of the container means that these shipping boxes can be adjusted while making good use of the volume , and that the mainly flat lid with the elevation 11 is easy to stack and the contents are easily accessible after removing the lid.

The main advantage of the new containers with lids is that they can an exploitation of existing facilities for gable top containers allow and therefore very rational and cheap containers for customers, who already have such facilities, e.g. B. dairies represent. The containers have a number of the same advantages as the usual one Gable-top containers have, among other things, that they can be delivered to dairies in the form of flattened pods and thus require little storage space. The production of the processing pieces is practically just as simple as the production of processing pieces of the common gable top container, because the flat folds 3 'are unusually simpler because of them. Form with very simple equipment in the packaging factory without Application of the ^ egg can be made in the edge area is simply bent over 18O and welded in place by heating. Existing production facilities can thus be modified with very little modifications be used for gable-top container processing pieces. After the pods laid flat and erected the bottoms are welded, the containers can be filled in the usual way. The subsequent closing of the container is technical seen extremely simple, since the plastic cover produced in advance only needs to be pressed onto the container edges. The plastic cover can be machined by hot deformation Made of thin, hard plastic with an approximately constant wall thickness (approx. 0.3 mm) can be produced. Suitable materials are polystyrene and PVC.

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It will be apparent that a number of modifications can be made in the shape of the lid. The best shape of the groove 6 to achieve a good fastening of the cover and an easy insertion ^ of the opening edge 2, can expediently by experiments be determined. The upper, inner end of the groove 6 can optionally be made tighter in order to cause a certain wedging of the upper opening edge 2. It can be seen that the towering Part 11 of the cover 4 can have a number of other shapes. However, the elevation 11 shown in the form of a straight truncated pyramid results in an attractive, characteristic shape, large Stiffness and a good stacking area and is therefore preferred.

Claims (4)

Protection requirements 1. Prismatic container with lid, characterized in that the container (1) is bent over from a longitudinal groove, coherent processing piece is made, which consists of plastic-coated cardboard and a container with polygonal, preferably a square bottom and mainly flat, parallel side walls (3) and an upper opening in which the Ps.ppstück by. Bending from 18O to a flat fold (3 ¹ ) is doubled, which is held on the outside of the container by welding the plastic coverings facing each other, is shaped and welded that the edge area (7) of the lid has a groove (6) with a narrow has an inverted U-cross section, ede can be placed directly over the opening edges (2) of the container, and that a shoulder (8) is formed in the outer wall (^) of the groove (6) which connects to the free lower edge (3 ") of the bent fold area (3 ¹ ) interacts. 2. Container according to claim 1, characterized in that that the edge area (7) with the rest of the cover {4) at the free End of the U-cross-section related. 3. Container according to claim 2, characterized in that that the cover (4) made of thin, hard plastic with an approximately constant wall thickness is warmly formed. 4. Container according to claim 3, characterized in that that the lid is provided with a raised part (11) in the middle is that protrudes to the level of the upper edge or yoke part (12) of the edge region (7).