JP3561526B2 - package - Google Patents

Description

[0001]
[Industrial applications]
The present invention is constituted by laminate of paper or cardboard and thermoplastic, about the format of the packages to be produced from a continuous material web with the joint strip running along its one edge.
[0002]
[Prior art]
Single-use disposable packages for liquid foodstuffs are often of the type made from a laminate of thermoplastic or possible aluminum foil laminated to a paper or cardboard core. This material web is formed into a tube in a filling machine, filled with the intended contents, cut into individual packages and finally formed into finished cartons or packages. For this type of package, the edges of the inner material web that are in contact with the liquid contents need to be protected so that the package contents cannot penetrate into the paper layer. This is generally addressed with narrow joint strips of thermoplastic. This joint strip is permanently fixed, ie forms part of the inner plastic layer laminated to the material web, or alternatively the joint strip can be applied to the material web once prepared for lamination.
[0003]
Such liquid food packages also have some type of opening structure, which can be constructed by covering a pre-punched hole with a plastic strip. Also in such an example the edge of the hole must be covered by an inner strip to protect the exposed paper fibers from the enclosed contents.
[0004]
[Problems to be solved by the invention]
One object of the present invention is to design the joint strip such that the joint strip forms part of the wall surface of the finished package, thereby forming a wall panel that allows consumers to view the product.
[0005]
Another object of the invention is that the joint strip comprises an opening structure on the surface. In such an example, punching of the paper layer is avoided, resulting in no free paper edge to be protected from the package contents.
[0006]
[Means for achieving the object]
These and other objects, Oite the form of a package as described in the introduction, the joint strips of plastic having transparency constitute a part of the package wall, the opening structure is provided in the joint strip And wherein the laminate is characterized in that the laminate is not punched .
[0007]
Preferred embodiments of the present invention are further given the features described in the claims.
[0008]
Preferred embodiments of the present invention will now be described in greater detail with reference to the accompanying drawings.
[0009]
Referring to the drawings, FIG. 1 shows a section of a material web 1 intended for use in a package 2 according to the invention. The wide part 3 of the material web 1 is composed of a laminate in which different layers of thermoplastic and available aluminum foil are laminated on a paper or cardboard core. Usually, this laminate comprises the entire width required to produce the desired package 2, and this material web 1 according to the prior art has been provided with narrow, thin joint strips. This package 2 according to the invention consists only of a part of the laminate 3 forming the package, and a relatively wide plastic strip or joint strip 4 with good transparency is laminated along one edge of the material web. It is fixedly and sealingly connected to the material. The joint strip 4 is made rigid so as not to adversely affect the stability of the completed package 2. The plastic from which the joint strip 4 is manufactured must be heat-sealable so that it can be sealed along one edge to the material web 3 and, in the tube forming operation of the filling machine, to the other edge. No. The joint strip 4 is suitably composed of a laminate of different plastic layers that fulfills the various requirements imposed on the joint strip 4 with regard to heat sealing possibilities, transparency, rigidity and gas barrier properties. In such an example, on the one hand the edges of the laminated material turned inwards to face the contents of the package were protected, and on the other hand the consumer could see the sealed contents. The joint strip 4 that forms the wall surface 5 on the package 2 is obtained. The width of the joint strip 4 is approximately equal to half of the longitudinal side 6 of the finished package 2. By metallizing the joint strip 4, different types of dedicated packages are obtained. Thus, with the joint strip 4 fixedly sealed, the width of the packaging material web 1 according to FIG. 1 is the width required to produce the desired package dimensions.
[0010]
On its surface the joint strip 4 comprises an opening structure 7. In the preferred embodiment, the opening structure 7 is a punched hole 8 which is covered by a cover strip 9 which is fixedly sealed. This hole 8 is therefore punched into the joint strip 4 and in the next working stroke this hole 8 is covered by a fixedly sealed cover strip 9 called a pull tab. The pull-tab strip 9 may have a folded, unsealed portion 10 which acts as a grip lug when the pull-tab strip 9 is cut off. Before each fixed seal joint strip 4 of drilling and cover strip 9 is sealed against the packaging laminate That web portion 3, or joint strip 4 is carried out after it is sealed against the packaging laminate 3.
[0011]
Instead, the laminations 3 are fed separately to the filling machine, and the sealing of the joint strip 4 and the sealing of the perforations and cover strips for the laminations 3 are performed in the filling machine.
[0012]
Another embodiment of the present invention is shown in FIG. Has a punched with holes 8 in advance in this, or not completed package 2 of the external cover strip 9 is provided with an outer side lid portion 13, the lid part is injection molded in advance one or more of the components Can be done.

[0013]
The finished material web 1 according to FIG. 1 is formed in a tube filling machine, filled with the intended contents, sealed, cut into individual packages 2 and finally formed into a finished package form. You. This package has the appearance as shown in FIG. Alternatively, other package shapes that are made of a continuous material web 1 such as tetrahedral and cushion-shaped packages and then cut into individual packages 2 are transparent so that the contents of package 2 can be seen. Such a wide joint strip 4 may be provided to provide the property.
[0014]
In FIG. 2, the joint strip 4 is shown as part of the wall of the package 1, which gives good transparency and allows the consumer to see the enclosed contents. Level markings 11 are pre-printed on the laminate part 3 of the package adjacent to the joint strip 4 to indicate how much of the content remains in the package 1. Alternatively, the level markings 11 can be printed on the joint strip as shown in FIG.
[0015]
When the package 2 is opened by the consumer, the cover strip 9 is cut off and the unsealed portion 10 of the cover strip 9 is pinched and cut off towards the end wall 12 of the package 1. This operation exposes a pre-punched hole 8 in the joint strip 4 so that the sealed contents can be consumed at that time.
[0016]
As will be apparent from the foregoing description, the present invention provides a joint strip whose width allows the consumer to view the contents of the package and which itself is provided with the open structure of the package.
[0017]
The present invention should not be considered as limited to what has been described and illustrated, many modifications may be made without departing from the spirit and scope of the appended claims.
[Brief description of the drawings]
FIG. 1 is a front view showing a section of a material web used in a package according to the present invention.
FIG. 2 is a perspective view showing a package according to the present invention.
FIG. 3 is a perspective view showing a part of another embodiment of the package according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Material web 3 Wide part 4 Joint strip 5 Wall 6 Longitudinal side 7 Opening structure 8 Hole 9 Cover strip 10 Unsealed part 11 Level marking 12 End wall 13 Cover part

Claims (5)

A package of the type manufactured from a continuous web of material (1) composed of a laminate of paper or cardboard and a thermoplastic (3) and having a joint strip (4) extending along one edge thereof ( 2) wherein a joint strip (4) made of a transparent plastic forms part of the wall surface (5) of the package (2), and an opening structure (7) is formed in the joint strip (4). Wherein the laminated material (3) is not punched . Package (2) according to claim 1, characterized in that the opening structure (7) comprises a pre-punched hole (8) covered by a heat-sealed cover strip (9). package. The package (2) according to claim 2, characterized in that the holes (8) and the cover strip (9) of the opening structure (7) are covered by an outer lid part (13). Package (2) according to claim 1, characterized in that the level marking (11) is printed on a part (3) of the laminate material adjacent to the joint strip (4). Package (2) according to claim 1, characterized in that the level marking (11) is printed on the joint strip (4).

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