Compressible Thin-Walled Package For Liquids

Abstract

The invention deals with a thin-walled compressible package where on the compressible package transversal recesses are created so that the recesses are created at least in four layers where in each layer there are at least two recesses and at the same time the recesses in one layer are always in the position under and / or over the contact place of the recesses created in the neighbouring layers or under and / or over the gap between the recesses created in the neighbouring layers while at the same time the recesses in the neighbouring layers partly overlap each other with their side mains with regard to the longitudinal axis from the axial point of view, while at the same time at least two types of recesses, having different profiles and / or depths are created, and where the side margins of at least the principal recesses in the transversal direction to the longitudinal axis of the package consist of the transition of the profile of the recess to the flat surface of the package or of the transition of the profile of one recess to the profile of another recess created in the same layer, and where the principal of the invention consist in that at least in some recesses (1, 101), formed as principal recesses, there are auxiliary recesses (3, 31, 32) so created that the auxiliary recesses (3, 31, 32) are placed at the bottom of principal recesses (1,101), are arranged symmetrically with regard to the longitudinal and transversal axis of the principal recesses (1,101) and are created discontinuously along row of principal recesses (1,101).

Description

FIELD OF THE INVENTION [0001] The invention deals with packages of the bottle, vessel or container type that are adapted for easy compression for the purpose of volume reduction in a situation when these packages are to be stored as waste. The walls of such containers are treated in such a way that on the surface of the wall recesses are made to reduce stability of the wall to facilitate compression. BACKGROUND OF THE INVENTION [0002] At present many types of modifications of container walls mainly plastic bottles, are known that should facilitate compression of bottles so that they can occupy less space when stored as waste. In most cases, such a wall has a vertically-oriented accordion shape and its cross-section show the shape of a polygon or circle. A disadvantage of this design is usually insufficient rigidity of the whole bottle, which has a negative impact on the resistance of the bottle against bending and may cause prolongation of the bottle due to increased inner overpress...

AI Technical Summary

Benefits of technology

[0004] This way a compressible package is created that can be compressed in a predictable way, mainly without the risk of jamming of created folds and / or without the risk of buckling of the axis of the compressed package during its compression. Further, compression of such a package requires a relatively low force, allowing you to compress the packages manually in most cases without the need to use other pedal and / or lever driven devices or devices with a mechanical machine drive. Even in the design when in one layer the recesses touch with their sides or continuously pass one into another, but with a different recess profile substantially improved effects are achieved in the sense that even here the transitional places between the recesses sufficiently improve the tensile and bending strength of the package during compression, which ensures sufficient stability against buckling. We should point out that the main and auxiliary recesses may be created both towards the inside of the package and over the remaining surface of the package without recesses. In the latter case in fact formations with the shape of bulges will be created, but still they fall into the category of recesses and mainly from the functional point of view they represent a technical equivalent of recesses made towards the inside of the package. Naturally, on one package you may combine main as well as auxiliary formations having the form of recesses and bulges.

Problems solved by technology

A disadvantage of this design is usually insufficient rigidity of the whole bottle, which has a negative impact on the resistance of the bottle against bending and may cause prolongation of the bottle due to increased inner overpressure.

On the other hand, in the case of relatively shallow recesses or recesses forming a vertical row along a continuous strip of the wall without recesses, the bottle cannot be compressed in the axial direction or just with the use of a high force and with expected buckling unless a longitudinal guide is available during the compression.

Here, the purpose of the reinforcement is protection against undesirable axial prolongation, but production of such reinforcement makes the production technology rather complicated if there is an effort to blow the shape from a thin-walled semi-finished product to a hollow mould.

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