JPS5837185B2 - Peeling device for parallelepiped packaging containers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention consists of an elongated body whose ends are closed by transverse closing ribs and which are shaped like a parallelepiped and have a plurality of double-walled triangular pieces. The strips project from the end of the packaging container and are folded onto adjacent side walls of the packaging container, and at least one of the triangular flaps has a tear opening that is expandable and covered by tape. This invention relates to a peeling device for packaging containers (or paperboard containers).

This type of peeling device is disclosed in West German Patent Specification No. 1486682.
It is known by the No.

Such packaging containers have as carrier material a carton, paperboard or the like, which is rendered liquid-impermeable at least on the inside by a plastic layer.

Packaging containers of this type can be used for powdered and granular fillings as well as for liquids, such as milk.

In the case of previously known packaging containers, perforations or other thin lines are punched through the outer packaging container layer, and these lines are peeled off after the triangular flap is expanded to form the spout. In contrast, in parallelepiped-shaped packaging containers of the type mentioned at the outset, holes are already punched through the packaging container material and these holes are covered in a liquid-tight manner with tape.

The cover tape is captured by the grip part which is not fastened to the side wall and pulled off, and then a tear-off opening in the form of a circular hole, which is arranged inside the triangular flap, is exposed.

The disadvantage is that in this known packaging container, the pouring is not carried out by means of a jet or in a way that prevents spillage, since the peeling opening is arranged on the underside of the triangular flap which is bent upwards. This is because the liquid may flow out, at least in part, immediately after the cover tape is removed.

Attempts have been made to arrange the peeling opening still in the upper top wall of the packaging container with other opening devices according to DE 20 0 1 09 3 A1.

In this known packaging container, a rectangular slot covered by a cover tape is provided as a spout, which slot is located in one of the closing ribs in the upper top wall.

Sealing with cover tape presents difficulties due to the sealing ribs, which creates tightness problems.

The user desires a very simple opening process as is known, and errors can occur in the case of the above-mentioned known packaging containers.

It is therefore an object of the present invention to improve a tearing device of the type mentioned at the outset in such a way that the understanding of the opening process is improved and without deformation of the parallelepiped-shaped packaging container produced from an elongated body, while On the one hand, measures are taken for a functionally reliable opening and, on the other hand, for an extremely tight seal, in which case the manufacture of packaging containers with an opening device is to be improved so as to be much simpler. .

According to the invention, the peeling device is provided in the upper top wall without sealing ribs, the peeling opening being provided in the outer part of the deployable triangular flap and the packaging container being The cover tape, which is fixed to It is folded around the outer edge, and the air inflow opening is provided in the upper top wall and near the end of the cover tape remote from the triangular flap of the cover tape, the end of the cover tape being formed as a grip portion. This problem is solved by arranging a cover tape on the inside and upper top wall of the packaging container.

A prerequisite for the peeling device according to the invention is that it can be provided, without changing the known method of mass production of parallelepiped-shaped packaging containers from elongated bodies, on the one hand, which serves as the upper top wall and, on the other hand, from elongated bodies. A surface without ribs is required for packaging containers.

It has surprisingly been found according to the invention that the wall of a packaging container formed from an elongate body, i.e. the side wall along the fold edge of the folded elongate body, can be narrowed or at the same time used as an upper top wall. .

The triangular flaps protrude from the edge of the top wall and are folded only outwardly onto the side walls, whereas in other top walls used as the bottom of packaging containers, the triangular flaps must be folded into the top wall by conventional methods. Must be.

Such considerations in accordance with the present invention result in a packaging container having a completely flat top surface onto which a cover tape can be adhered or, in the case of commonly used plastics, sealed. be.

Fold edges such as those in the upper top wall are not obstructed.

The creation of the upper top wall without a sealing lip and the arrangement of the stripping device on this side simultaneously create the possibility of locating the stripping opening on the outside of the triangular flap.

This ensures that after tearing off the cover tape, the peeling opening is automatically always always in the upper layer of the triangular flap, ie the packaging can be opened upwards and spouts and spills are largely avoided.

The provision of folding the cover tape around the outer edge of the triangular flap ensures that when the cover tape is removed, the triangular flap is removed from the side wall and the triangular flap is unfolded in the plane of the upper top wall.

The user now has the possibility of opening a conventional packaging container for liquids, which consists of a carton, in a conceivable simple way.

That is, the user grasps the distal grip portion of the protruding cover tab, which is not adhesively attached to the upper top wall, and pulls this grip portion away in the direction of the triangular flap containing the peeling opening.

The direction of peeling is determined not only by the arrow printed on the top wall of the packaging container but also by its construction.

That is, the cover tape is peeled off only in the direction of the spout tip.

Even in a single peeling process, not only the peeling opening is exposed, but also the triangular hanging piece is reliably pulled up.

The packaging container can then be opened and poured.

In the present invention, a cover tape is similarly arranged on the upper top wall and the triangular flap inside the packaging container, and this cover tape is connected to the outer cover tape at the peeling opening position and is preferentially sealed. reasonably formed separately by the fact that

Such inner cover tape is easily attached by point seals or the like during the manufacturing process and easily welded to the outer cover tape during sealing.

The advantage of an inner cover tape is that in packaging containers made of cartons or paperboard, there are sometimes untreated cut or punch points, i.e. seams that are not laminated with plastic at the edges of the peeling openings, and this This is because there is a risk that the liquid press-fitted into the triangular piece may seep into it.

In such cases, the packaging container is softened from the circular perforation line of the peeling opening.

However, covering the tear openings from the outside and from the inside advantageously prevents the packaged liquid from penetrating into the carton from unstratified areas.

Furthermore, it is expedient according to the invention that the stripping opening is provided in the center of the triangular flap and that the hole for air entry is arranged in the upper top wall.

It is also known that exhaust holes are provided and, if necessary, sealed with the same cover tape.

In the case of known packaging containers, however, the cover tape often had to have a special form in order to cover both holes.

According to the invention, however, the packaging container has a smooth head, i.e. an upper top wall without any ribs or folded back plates, so that the arrangement of the holes can be made laterally within the range of the triangular flaps which are raised as desired. However, there is an advantage that it can be provided even at the center.

The central arrangement of the stripping opening in the triangular piece advantageously results in particularly good pouring properties due to the symmetrical condition.

According to an advantageous embodiment of the invention, the cover tape arranged on the inside of the packaging container is also sealed with the outer cover plate at the location of the air inlet opening.

According to the invention, it is also possible to provide, after punching the carton, a plastic layer that is slightly thicker than the layer of one carton, instead of the tape-like cover on the inside of the packaging container.

In some cases, after filling the packaging container, the outer cover tape is only glued or sealed, and the outer cover tape seals particularly tightly with the thick inner plastic layer at the location of the peeling opening.

In this case as well, there are two cover tapes, one on the outside and one on the inside of the packaging container.

It is particularly advantageous according to the invention that the inner cover tape is provided only in the area of the upper top wall and the triangular flap, ie in the same covering state as the outer cover plate.

For example, when applying a plastic layer to a stamped carton, this arrangement of the inner covering tape on the inside of the packaging container takes place intermittently and does not take place over the entire material web from one end to the other.

The purpose of this only partial attachment within the ranges mentioned is to avoid creating undesirable thickenings on the folding and sealing edges that would only interfere with the folding and sealing functions.

This avoids tightness or bad folding, which in conventional methods is often difficult to avoid at other locations on one packaging container.

In other words, the problems listed at the beginning can be solved in an advantageous way.
This is because not only are the manufacturing measures simply left unchanged, but the absolute tightness of the finished packaging is guaranteed, and the functionally reliable opening process is surprisingly easy to understand. be.

Further advantages, characteristics and applications of the invention will be explained in detail below with reference to the drawings.

The packaging container 1 is formed by forming a packaging container material, for example a carton, into an elongated body, e.g. in the form of a web, layered on one or both sides with plastic, thereby laterally sealing the elongate body with narrow parallel zones. Manufactured by

The filling of the packaging container takes place between the production of two successive transverse closures.

The parallelepiped shape is formed before or after the packaging containers are separated from each other by cutting in the closure zone.

In the above molding process, the packaging container 1 has side walls 2, 3 and a top wall 4, and only the top wall 4 on the middle upper side of the top wall is shown.

The closure ribs run along the three narrow sides around the packaging container, the middle and front two ribs of the three narrow sides are shown, and the closure ribs 14 reach the apex of the triangular flap 7. It has passed until now.

The upper top wall 4 forms a flat top surface without closing ribs, and both triangular flaps 7, of which only the front left triangular flap is shown, are folded down onto the front side wall 2 and It will be glued there.

The triangular flap 7 has two angularly opposed and pointed outer edges 8 and 9 and continues to the upper top wall 4 via the fold edge 5.

On the upper side of the triangular flap, partially visible in FIG. 2, there is a peeling opening 11, which is indicated by dotted lines in FIG.

The air inlet is arranged at a position off the center fold line 13 to improve the air inlet.

The cover tape 15 is welded onto the upper top wall 4,
A closure starting on either side of the center line 13 extending over almost the entire length of the upper top wall and extending through the triangular flap 7 to the apex of the triangular flap or on the underside of the triangular flap. Both sides of the rib 14 are bent around the outer edges 8 and 9 of the triangular hanging piece.

The tape end, which is not fused to the upper top wall, is shown raised in FIG.

The folding of the cover tape 15 along the apex of the triangular flap 7 is such that the narrow terminal edge of the cover tape 15 lies directly at the apex of the triangular flap 7 and both protruding triangular ears of the cover tape are not shown. This is done by bending the triangular hanging piece 7 around the edges 8 and 9.

The triangular selvage of the cover tape is bent in such a way that this selvage lies directly on the underside of the triangular flap, ie in the gap between the triangular flap and the closure rib.

When the sealed packaging container according to FIG.
5 upwards in the direction of arrow 6 according to FIG.

As a result, the air inlet hole 12 is opened first, and then the stripping opening 11 is opened.
is exposed, and immediately after that, the triangular hanging piece 7 is pulled up.

In embodiments in which the top wall of the packaging container is lined with plastic on the inside or is provided with a cover tape, the opening process takes place in the same way.

In the area of the peeling opening 11 and the air inlet hole 12, the plastic layer is peeled off along clearly defined, precise edges to obtain the best pouring conditions.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the package in a closed state with a sealed cover tape, and FIG. 2 is a perspective view of the package showing the cover tape almost completely removed after the triangular flaps have been deployed. It is a diagram. Explanation of main symbols in the drawings, 1...Packaging container, 4.
... Upper top wall, 7 ... Triangular hanging piece, 8,
9...Outer edge of triangular hanging piece, 11...Peeling opening, 12...Air entry JL14...Blocking rib, 15... Cover tape, 18...
・Grip part.

Claims (1)

[Claims] 1. Consists of an elongated body closed at the end by transverse closing ribs and in the form of a parallelepiped, having a plurality of double-walled triangular pieces, the triangular pieces being projecting from the edge of the packaging container and folded onto the adjacent side wall of the packaging container, and at least one of the triangular flaps has a peeling opening that is deployable and covered with tape. ,
Peeling of packaging containers. In this case, the tearing devices 11, 12, 15, 18 are arranged in the upper top wall 4 without sealing ribs and in the deployable triangular flap 7, with the tearing opening 11 being located in the triangular flap 7. A cover tape 1 is provided on the outer part of the packaging container 1 and is fixed to the packaging container 1.
5 extends over the entire length of the tenon of the upper top wall 4 and passes through the triangular hanging piece 7 to the tip of the triangular hanging piece, and on both sides of the closing rib 14 starting from this tip, there is an outer ridge of the triangular hanging piece. 8, 9, and the air inlet opening 12 is provided in the upper top wall 4 and near the end of the cover tape remote from the triangular flap 7 of the cover tape 15. Peeling of a packaging container in the form of a parallelepiped, characterized in that the end is formed as a grip part 18, and a cover tape is also fixed on the upper top wall 4 and on the triangular flap 7 inside the packaging container 1. Opening device.