Packaging

Abstract

The proposed product relates to the field of manufacturing packaging for primarily liquid, fatty, and frozen food products or for products that contain or release fats and moisture. The present packaging, having an overlapping seam with a sealed end face, is made of a shape-giving material that consists of a base material and a protective layer applied on one side of said base material. The protective layer is elongated relative to the base material, and at the place where the shape-giving material is joined in an overlapping fashion to form a seam, the elongated protective layer is connected on the inner side of the packaging to the adjoining layer of shape-giving material without the protective layer coming into contact with the end face surface of the shape-giving material, to protect an end face without thickening the material at an overlap point and without the overlap point being excessively rigid, as well as without using an additional protective polymer tape or an expensive base material having hydrophobic properties.

Claims

1. Packaging with a sealed lapped end-face of the seam made of a forming material consisting of a frame material and a protective layer, which is distinguished by the fact that the protective layer is applied only from the inner side of the frame material, is made of elongated relative to the transverse length of the frame material, and at the point where the forming material overlaps to form the package seam, the elongated protective layer is connected to the mating layer of the forming material, without contact with the end-face of the seam.

2. Packaging according to item 1, which differs in the fact that the protective layer is made of biodegradable polymer.

Description

DRAWINGS OF THE INVENTION

[0030] FIG. 1 schematically depicts conventionally known elements of packaging with a protective layer having an unprotected end-face edge;

[0031] FIG. 2 schematically depicts a conventionally known method contemplating a bending pattern with compensation for excess layer thickness by trimming the bending edge of the frame material;

[0032] FIG. 3 schematically depicts a conventionally known method contemplating application of a polymer tape around the end-face (seam) of the frame material, to protect the end face;

[0033] FIG. 4 schematically depicts a conventionally known method contemplating application of a polymer tape partially around the end-face of the frame material and partially along an inner surface of the protective layer, to protect the end face;

[0034] FIG. 5 schematically depicts a preferred embodiment of the invention contemplating application of an elongated protective layer of a polymer tape to a mating surface of the frame material, to protect the end face.

DESCRIPTION OF KNOWN METHODS VERSUS PREFERRED EMBODIMENT OF THE INVENTION

[0035] The proposed protection of the end-face of the forming material by extending the protective (lamination) layer and further heat sealing with the adjacent layer during the formation of a packaging container is explained in the attached drawings wherein: [0036] 1protective layer; [0037] 2frame material; [0038] 3polymer tape; [0039] 4elongated protective layer; [0040] 5insulated protected end-face of the frame material.

[0041] FIG. 1 shows the general characteristics of the problem. When forming a frame package coated/laminated with a protective layer on the inner surface of the package, the bonding of the material creates an unprotected end-face edge (unprotected end-face), which then comes into contact with the contents of the package.

[0042] It is also the most commonly used side wall mounting scheme for forming paper cups and food containers with a round base. At their manufacturing the frame material with high indicators of obstruction of end-face absorption is most often used.

[0043] FIG. 2 shows a bending or reversal pattern with compensation for excess layer thickness by trimming the bending edge of the workpiece.

[0044] Due to the increase in the number of layers up to three at the welding/gluing point of the packing walls, the seam has an excessive compaction, which imposes some restrictions on the formation of glasses and containers with a round base and a rolled edge.

[0045] FIGS. 3 and 4 show a polymer tape application scheme to protect the end-face of the frame material. It is a method of end-face protection used in the production of packaging for liquid products. The method is based on the application of an additional, specially multi-layer material in the form of a polymeric tape with reduced elasticity for the possibility of its application. This method has a significant limitation: it is used to process the web fed material/workpiece before it is divided into single products.

[0046] This method of protecting the end-face of the frame material creates an excessive thickness of the seam, which may impose restrictions on the types and methods of formation of packaging.

[0047] FIG. 5 schematically shows a preferred embodiment of the claimed invention, wherein no excess thickness is created in the place of fastening mating surfaces of a frame material and a protective layer, no additional materials are introduced (as in the case of a fold), and the direction of the frame material fibers is not changed, which, in the conventionally known methods, changes the local physical and mechanical characteristics of the frame material in the place of seam and may impose restrictions when rolling an edge of the package, or during further formation of the package.

[0048] The forming material of the container consists of a frame material 2 and a protective layer 1, applied from the inner side of the frame material 2, thereby forming an end-face 5 of the frame material. The protective layer 1 is extended by means of an elongated protective layer 4 in relation to the frame material 2 and, at the point where the forming material overlaps to form a seam, the elongated protective layer 4 is connected to a mating layer of the forming material. In this way, the end-face 5 of the frame material 2 is sealed by covering the end-face 5 with the elongated protective layer 4, without thickening the forming material.

[0049] Further production of containers (packaging) is carried out in a conventional way with the selection of appropriate tools and welding modes of the frame material 2. Together with the welding of the frame material 2, the elongated protective layer 4 is welded to the mating surface to protect the welded area from contact with the external environment (e.g. the contents of the container) and to protect the end-face 5 of the frame material from contact with the contents of the container or the external environment.