RU2263054C1 - Tray type container - Google Patents

Abstract

FIELD: packing equipment, particularly containers of polygonal cross-section formed by folding or erecting one or more blanks made of paper.

SUBSTANCE: container is formed of rectangular blank of plastically deformed sheet flexible material. The blank is divided by fold lines into several parts forming container bottom, side and end walls, corner members, as well as end and corner flanges. Corner members of adjacent walls include triangular parts defined by fold lines and are folded inside the container along fold lines. The container is of cuboids shape. End flanges thereof are bent outwards in parallel to container bottom. Each corner flange is bent onto two adjacent flanges and flush with them so that triangular corner parts are simultaneously formed, wherein the corner parts define dovetail outline in cross-section. Corner member is shaped as triangular pyramid. Mating members of corner and end flanges are welded or heat-sealed so that common flange extending along the full container perimeter is created.

EFFECT: increased reliability and rigidity of corner members, possibility of container usage for air-tight product packing.

2 cl, 4 dwg

Description

FIELD OF THE INVENTION

The invention relates to containers and packaging made from sheet blanks of plastically deformable flexible materials, in particular from paper, uncoated cardboard, with a thermoplastic or polymer coating or a coating based on metallized films, other laminated materials and can also be used for packaging food products.

BACKGROUND

Widely known are containers and trays made from sheet blanks, in particular from cardboard, and also with a thermoplastic and (or) metallized coating applied to it on one or both sides, for example, based on aluminum films, by bending the initial blank by kink lines with subsequent fixation of locking elements, as well as gluing or welding of mating surfaces.

Known, for example, is the capacity (see AS SU No. 1532440, class B 65 D 5/20, Bull 48, 12/30/89), made of a flat cardboard blank, divided by fold lines, when folding which are adjacent the ends of the four side walls are bent inward, and to fix the finished product, they are bent outward with the coverage of adjacent side walls and the formation of a lock.

The disadvantage of this device is the low reliability of the locking of the locking elements, as well as the existing objective difficulties when using the device for sealed packaging, for example, liquid food products.

A container is also known (see AS SU No. 1784547, class B 65 D 5/26, Bull. 48, 12/30/92), made of a flat cardboard blank with a thermoplastic coating, divided by fold lines into sections forming when folding the base, side and end walls, corner sections and sections for the formation of sides, trapezoidal parts are placed between the triangular parts of the corner sections to form corner stiffeners having a dovetail shape in cross section in an amount equal to the number of trapezoidal parts. After bending, the formed container is welded.

The disadvantage of this device is its manufacture from a shaped blank and the inability to perform in the form of a rectangular parallelepiped (excluding edge flanges), the complexity of the final assembly of the shaped product.

Both of the above devices are also the closest analogues of the invention.

The aim of the present invention is to increase the reliability and rigidity of corner elements, the manufacture of a device in the form of a rectangular parallelepiped (excluding edge flanges), obtaining the additional possibility of using the device for sealed packaging, for example, liquid food products, as well as simplifying the final assembly.

SUMMARY OF THE INVENTION

The essence of the invention lies in the fact that the container-tray is made of a flat rectangular sheet blank of plastically deformable flexible material, divided by lines of inflection into sections forming the bottom, side and end walls, corner elements, edge and corner flanges. In this case, the corner elements of adjacent walls include triangular parts bounded by kink lines, bent inward along kink lines, the container-tray as a whole is shaped like a rectangular parallelepiped, edge flanges are bent outward parallel to the bottom, each corner flange is bent into two adjacent edge flanges flush with them with the simultaneous formation of triangular parts of angles having a dovetail shape in cross section, and in general the corner element is made in the shape of a triangular pyramid, the mating elements of the edge O and corner flanges connected by welding or thermal bonding to form a single edge flange around the perimeter of the device. Moreover, in order to obtain a single single-level upper surface of the edge and corner flanges, the interface sections of the edge flanges are additionally formed by stamping or pressing.

LIST OF DRAWINGS AND OTHER MATERIALS

Graphic materials of the invention are presented in figure 1, figure 2, figure 3 and figure 4, which depicts:

Figure 1: Blank for capacity tray

1; 2; 9; 10; 11 - lines of inflection; 3 - bottom; 4 - side wall; 5 - end wall; 6 - edge flange; 7 - an angular flange; 8 - radial line of inflection; 12 - areas of fixation of the device (shown conditionally for one angle).

Figure 2: Capacity-tray

3 - bottom; 4 - side wall; 5 - end wall; 6 - edge flange; 7 - an angular flange; 11 - line of inflection; 13 is a triangular corner element.

Figure 3: Corner element in the formation stage

12 is the area of fixation of the device.

Figure 4: View of the fixation area - A in Figure 3

a - a connecting layer; b is the area of additional molding.

DETAILED DESCRIPTION OF THE INVENTION

Capacity-tray (Figure 2) is made of a flat rectangular sheet blank, separated by lines of bends 1 and 2 (Figure 1) on the bottom 3, side walls 4 and end walls 5. On the additional lines of bends 9, 10 and 11 are formed edge 6 and corner 7 flanges.

The device is folded as follows.

The side walls 4 (Figure 1) and the end walls 5 are bent along the lines of the bends 1 and 2 in one direction with the simultaneous location of the corner elements of adjacent walls inside the formed container. Along the bend lines 9, 10 and 11, edge and corner flanges are formed by bending them outward of the vessel parallel to the base, and the corner flanges are bent flush with adjacent edge flanges. At the final stage, the corner elements are formed (Figure 3) by fixing the corner flanges on the edge flanges by means of mating elements having the finished value triple the thickness of the material used by gluing or welding (Figure 4). In a horizontal section, the corner elements form a dovetail shape.

To obtain a common, even, single-level surface of the edge and corner flanges, if necessary, additional molding of section b in Fig. 4 is carried out to obtain the possibility of hermetically closing the container-tray when packaging, for example, food products with a sheet lid of a metallized film or other material by gluing or welding around the perimeter of the corner and edge flanges of the device. General view of the product is presented in figure 2.

The possibility of carrying out the invention is confirmed by the fact that to implement the proposed solutions, you can use the technical means already used in this field. In particular, methods for manufacturing containers from billets by the method of kinks of forming planes, as well as gluing and welding of finished structural elements, are widely known.

Claims (2)

1. The tray is a tray made of a flat rectangular sheet of a blank of plastically deformable flexible material, divided by fold lines into sections forming the bottom, side and end walls, corner elements, edge and corner flanges, characterized in that the corner elements of adjacent walls, including the triangular parts bounded by the inflection lines are bent inward along the inflection lines, the container-tray as a whole is shaped like a rectangular parallelepiped, the edge flanges are bent outward parallel to the bottom, each of the corners the flange is bent into two adjacent edge flanges flush with them with the simultaneous formation of triangular parts of angles having a dovetail shape in cross section, and in general the corner element is made in the shape of a triangular pyramid, the mating elements of the edge and corner flanges are connected by welding or thermal gluing with the formation of a single edge flange around the entire perimeter of the device. 2. Capacity-tray according to claim 1, characterized in that to obtain a single single-level upper surface of the edge and corner flanges, additionally formed sections of the interface of the edge flanges by stamping or pressing.

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