SE523133C2 - Packaging, primarily intended for food - Google Patents

Abstract

The present invention relates to a package comprising a one-piece blank whereby the side walls have support tabs (12) which project from them at both ends and which are delimited from the edge sections by means of a first fold indication (13), and whereby the support tabs (12), in a storage state, are located in the same plane as the raised first edge sections (2,3), as a result of which the packages, with their edge sections diverging from the bottom section in this unfilled state, can be pressed down into each other for space-saving stacking of empty packages, and whereby the support tabs (12) are provided with locking portions (16) and, after the support tabs have been folded down to a support position in which each support tab (12) rests against an upper edge of the adjacent second edge section (4,5), said locking portions (16) are arranged to project completely outside said upper edge. <IMAGE>

Description

lapa »'opva 10 15 20 25 30 523 133 n | : n; u ø | | . o now the lower parts of the stack are high and there is a risk of pressure damage. Meat juice can be squeezed out, which is of course not desirable.

In addition, for example, minced meat is discolored when exposed to pressure and although the quality of minced meat has not always deteriorated to a significant degree from this discoloration, it is likely that consumers do not buy these products or at least question the quality, which can cause problems for the trader.

When handling known plastic trays with meat products and enclosing plastic film, loads caused by other plastic trays are often absorbed directly by an unsupported plastic film, which can be stretched and broken.

Despite obvious disadvantages, both environmentally and in terms of handling, cellular plastic trays have long dominated the market.

DISCLOSURE OF THE INVENTION The present invention has provided a package which completely eliminates the above-mentioned problems.

The package according to the invention is characterized in that the first pair of opposite edge pieces, for example those forming the side walls, at both ends of each edge piece have projecting support flaps, which are delimited from the edge pieces by means of a first folding instruction, that opposite edge pieces diverge slightly in the remaining state. direction from the bottom piece, that said support flaps in a storage condition, before the support flaps are folded inwards around their said first folding instructions, are located in the same plane as the raised first edge pieces, whereby the packages with their edge pieces diverging from the bottom piece in this unfilled state are compressible for space. stacking of empty packages,: vsnø annu; 10 15 20 25 30 ^ 523 133 u -. u n s u «| aa ø n »that the support flaps are provided with locking portions, which are arranged that after folding down the support flaps to a support position, where each support flap rests against an upper edge of the adjacent second edge piece, completely protrude beyond said upper edge, that the locking portion on each support fl ik is delimited from the carrier flap otherwise by means of a second folding instruction, which is designed to form very little resistance to folding down of the locking portion towards the outside of the second edge piece, and the package is intended to be closed by means of a plastic film or the like, which is arranged to at least cover the top of the package and upper portions of the respective edge piece.

According to a suitable embodiment, the invention is characterized in that adjacent edge pieces are mutually fixed by means of folded and integral corner portions connected to said adjacent edge portions, which are delimited from the first pair of edge pieces by means of third bending lines and from the second pair of edge pieces by means of said bending lines. bending line forms a first obtuse angle with the first bending line and wherein the fourth bending line forms a second obtuse angle with the second bending line, that between the third and fourth bending lines a fifth bending line is arranged, that the corner flaps when raising the edge pieces are arranged to fold at third and the fourth bending line and double-folded around the fifth bending line and that the double-folded corner portions are connected by two opposite raised edge pieces.

According to a particularly environmentally friendly embodiment, the invention is characterized in that the blank is formed of corrugated cardboard or cardboard laminated with a plastic film, which is arranged on the side which, after rising of the blank, forms the inside of the package.

It is of course important that the packaging can be manufactured simply and rationally and made in different sizes, which can be adapted to the customer's needs. item: i1; |, 10 15 20 25 30 523 133 The customer wants travel packages, which can be filled directly with the item in question. This requires that empty packages can be stacked in each other so that empty packages take up as little space as possible during storage and transport.

It must preferably be possible to close the packages after filling the product with minimal manual handling.

The package according to the invention is intended to be closed after filling the product by first initiating the carrier flaps at the ends of two opposite edge pieces manually in their folding down to their final position abutting the edge of adjacent edge pieces, after which the carrier flaps and associated locking parts are automatically brought into place. of the packaging in the plastic film.

It is important that the second folding guide, which delimits the locking portion from the support flap in general, forms very little resistance to folding down around the folding guide. According to a particularly suitable embodiment of the invention, this has been solved in that the second folding guide, which delimits the locking tab from the corner flap, otherwise has a continuous groove extending along the folding guide, which groove extends over the main part of the folding guide.

DESCRIPTION OF THE FIGURES The invention will be described in more detail in the following with reference to an exemplary embodiment shown in the accompanying drawings, of which: Figure 1 in plan view shows the blank of a package according to the invention.

Figure 2 shows the substance according to figure 1 in an almost residual state. avnao = »; :: 10 15 20 25 30 523 133 s u n u: n n ø: Q. . - o.

Figure 3 shows a number of erected packages according to Figures 1 and 2 and placed in a stack.

Figure 4 shows a leftover package according to Figures 1 and 2 with a carrier flap folded down.

Figure 5 schematically shows a filled package according to Figures 1, 2 and 4 enclosed in a plastic film.

Figure 6 shows two closed packages according to figure 5 stacked on top of each other.

Figure? shows an example of how erected and stacked and empty packages according to figure 3 can be applied in large packages for transport and storage.

EMBODIMENT EXAMPLE The blank according to Figure 1 consists of a rectangular bottom piece 1, a first pair of opposite edge pieces 2, 3 and a second pair of opposite edge pieces 4, 5. The first pair of edge pieces 2, 3 are intended to form the side walls of the package and are delimited from the bottom piece 1. by means of first bending lines 6. The second pair of edge pieces 4, 5 are intended to form the end walls of the package and are delimited from the bottom piece 1 by means of the second bending line 7.

The one-piece blank has corner portions 8, which connect adjacent edge portions, for example the edge portions 2 and 4. The corner portions 8 are delimited from the first pair of edge pieces 2, 3, the side walls, by means of third bending lines 9 and from the second pair of edge pieces 4, 5, n- »np tv1n- 10 15 20 25 30 523 133 evv ø« usn 1 | u n n now the end walls, by means of fourth crease lines 10. The third crease line 9 forms an obtuse angle with the first crease line 6 and the fourth crease line 10 forms an obtuse angle with the second crease line 7.

In the middle of the third and fourth bending line, a fifth bending line 11 is arranged on each corner flap 8.

When raising the edge pieces 2, 3, 4 and 5 to form side and end walls on the package, the corner portion 8 is folded at the third and fourth bending lines 9 and 10 and double folded around the bending line 11.

The flat blank has at both ends of the side walls forming edge pieces 2, 3 projecting supports 12 which are delimited from the edge pieces by means of first folding directions 13. These each consist of a bending line 14 and of a continuous folding slot 15, as in the embodiment shown. extends in the order of one third of the folding guide 13. The folding slot 15 is intended to reduce the risk of resilience of the support flap, when this is folded around the folding guide 13.

The support flaps 12 are provided with locking portions 16, which are otherwise delimited from the support flaps by means of a second folding guide 17, which second folding guide is designed to form very little resistance to folding down of the locking portion. In the exemplary embodiment shown, the second folding guide 17 is constituted by a continuous groove extending along the guide, which groove extends over the main part of the second folding guide.

The corners 18 of the side walls 2, 3, located between the corner portions 8 of the blank and the support flaps 12, are softly rounded to give the raised package rounded upper corners. selection ø ».n; According to a suitable embodiment, the blank according to Figure 1 consists of a laminate of corrugated cardboard and a liquid-tight plastic film arranged on one side thereof. Corrugated cardboard in the form of so-called E-raft with a size of about 1 mm has proven to be suitable for food packaging, such as trays for portions of meat or for minced meat.

The liquid-tight plastic film is applied to the side of the blank which is intended to form the inside of the package, thereby preventing liquid from leaking from the package or being absorbed by the packaging material. Liquid sucked into the material would of course affect the strength properties of the packaging.

Examples of suitable plastic films are polyethylene, polypropylene and polyester.

The choice of plastic as well as the thickness of the plastic element in the laminate is selected for the intended use. In the exemplary embodiment shown, when raising the edge pieces 2, 3, 4 and 5 of the package, it has been chosen to fold the corner portions 8 outwards, as most clearly shown in Figure 2, and then glue the double-folded corner portions to the outside of the edge pieces. This has been chosen to obtain a stronger connection by means of hot melt adhesive than would be the case if hot melt adhesive was applied between 2 plastic surfaces, ie if the corner flap is folded in towards the inside of the edge piece. The connection of the double-folded corner portions to the outside of the edge pieces is furthermore suitable for the reason that contact between any liquids present in the food and the glue used is avoided.

Opposite edge pieces 2, 3 and 4, 5, respectively, ie opposite side and end surfaces, respectively, diverge in the raised state in the direction from the bottom piece 1.

This has been achieved in that the third and fourth crease lines 9 and 10, as mentioned above, form an obtuse angle with the first and the second crease lines 6, 7, respectively.

In Figure 1, said obtuse angles have been marked by indicating the angles by which each obtuse angle exceeds 90 °. In the drawings, these have n> f> a 10 15 20 25 30 523 133 o o u e o | o ~; Q vv now angles are marked with b and c. As shown in figure 1, the angle c is significantly larger than the angle b. outwards in raised condition. The reason why the angle c in the exemplary embodiment shown is suitably larger than the angle b is that the corner portions 8 are folded outwards, as most clearly shown in Figure 2, and are placed double-folded towards the outside of the end walls 4, 5, which means that the end walls together with the double-folded corner portions are significantly thicker. than only the side walls and that the angle c is chosen larger than the angle b to compensate for the increase in the thickness of the end walls which double folding of the corner portions entails. The angles b and c and the thickness of the side and end walls determine how deep empty packages can be pressed into each other when stacking empty packages during transport and storage.

In the example of measures of the thickness of the blank in the order of 1 mm, as stated above, angles b of in the order of 3 ° and angles c of in the order of 15 °, which angles selected in the embodiment shown, give a good and space-saving stackability of empty packages intertwined. Figure 3 shows erected packages formed of the blank according to Figure 1, stacked in each other.

The corner portions 8, which when erecting the side and end walls of the package are folded outwards and double-folded around the fifth creasing line 11, are suitably connected to the outside of the end walls 4, 5 by means of hot-melt adhesive. The fifth crease line 11 is symmetrically arranged between the third and fifth crease lines. In the exemplary embodiments shown, the angles α are of the order of 36 °.

In Figure 4, which shows a leftover package, a carrier flap 12 has been folded down to its carrier position, in which a portion in the immediate vicinity of the second folding guide 17 rests against the upper edge of the end wall 5. The locking portion 16 of the carrier flap has been arranged to ensure that a portion of the support flap always rests against the upper edge y =; »1 10 15 20 25 30 523 133 'u ø ocouoco Q oo v. 9 on the end wall, so that loads from above on the respective support flap are absorbed by the end walls.

The locking portion 16 is folded down on the outside of the respective end wall by folding around the second folding guide 17, which by arranging the continuous groove extending over the greater part of the folding guide shows little resistance to folding down. In a particularly preferred embodiment, the intention is that the locking portion is automatically brought to the intended place when closing a package filled with goods by means of a plastic film, which when the seal is enclosed around the end walls carries the locking portion and holds it in the intended place.

Because the folding guide 17 has little resistance to folding of the locking portion and because the corners 18 are softly rounded, there is no risk of a plastic film being applied over a filled package being torn against flaps or corners on the upper part of the package. In the preferred embodiment shown, the locking portions are folded down and held in place only by means of the cover film. Within the scope of the invention, however, there are also embodiments where means are provided for connecting the respective locking portion to the outer sides of the end walls.

An example of a suitable such connection is double-sided adhesive tape applied to the locking portion and / or to the outside of the end walls.

Figure 5 shows the package according to the preferred embodiment enclosed in a plastic film 19. Wrapping a filled package in a plastic film can be available in many different ways and is not critical to the invention. finn: 1:11: 10 15 20 25 30 0 0 n: uo nn n: nn un nn uno nn:: non nn nn nn on on nn vn H "_ o. nn vu nnon: nu nnn - na nn nu: The essential thing is that the carrier flaps 12 are bent down to their carrier position and that a plastic film is then stretched over the package and brings the locking portions 16 to the locking position, and that the plastic film in a suitable manner The plastic film is arranged so that the at least seal encloses the product and holds the locking portions in place.

The carrier flaps 12, which are shown in their carrier position when the package is closed according to Figure 5, in this position of use project a distance over the interior of the package and together the four carrier flaps form a very secure carrier surface when stacking filled packages on top of each other. Figure 6 shows two packages stacked on top of each other.

The packaging according to the invention solves a lot of problems that have been associated with previously known packaging for pressure-sensitive goods, in particular foods that consumers want to inspect before buying.

The carrier flaps 12 with their locking portions 16 provide a good stacking protection at the same time as the goods in their entirety can be inspected through the plastic 19.

Important properties are the space-saving stackability in the rest but unfilled packaging state and the stackability in the filled and closed state.

It has been mentioned above that the packaging is suitable for storing meat and minced meat. The package according to the invention is particularly suitable for all types of pressure-sensitive foods, such as fish, chicken and fruit.

The package according to the invention is of course particularly suitable for very delicate products, such as strawberries. The packaging blank may suitably, as mentioned above, be formed of a laminate of corrugated cardboard and a plastic film, the latter being applied to the intended package................................. inside. The corrugated cardboard is suitably treated on the side intended as the outside of the finished package so that liquid, for example blood, which is spilled in connection with filling the package can be easily wiped off.

A suitable alternative to corrugated cardboard and which is also environmentally friendly is cardboard.

Both corrugated cardboard and cardboard can be provided with print on the outside, for example for marking the type of item, lure offer and more.

Other materials that from a functional point of view can work well for packages according to the invention are so-called channel plastic or so-called corrugated plastic. Figure 7 shows a suitable example of how erected empty packages according to the invention can be transported and stored. The drawing shows two large packages 20 for empty raised packages according to the invention.

The large package consists of a bottom 21 and an identical lid 22 formed with the bottom as well as side and end walls, which walls are formed of four identical wall portions 23. These are provided with three bending lines 24, 25, 26.

When forming the end walls, the wall portions are folded along the curvature lines 24 and 25. On the side walls which are longer, the curvature lines can be used to facilitate removal of the side wall to open the large package, as shown in Figure 7. When removing the side wall, the curved line 26 is also used. by cutting open the lid and bottom along the lines 27. The layer shows a side wall removed and a high stack 28 of empty packages according to the invention.

The invention is not limited to the embodiments described above, but a number of variations are possible within the scope of the appended claims. m- »a.,» n: 10 S23 135 12 Size and shape can be varied, for example, the packaging in the rest condition can be significantly deeper than what is shown in the drawings.

The corner portions 8 do not necessarily have to be folded outwards but can be folded inwards and fastened double-folded towards the inside of, for example, the end walls.

The connections between the corner portions and the inside of the package can then be made, for example, with a weld seam.

The second folding guide 17 may be a perforation, but a continuous groove as described above is preferred, since a folding guide with very low folding resistance is desired and this can be difficult to achieve with a perforation. This applies not least to manufacturing tolerances.

Claims (9)

10 15 20 25 30 f 523 133 13 PATENT REQUIREMENTS Packaging comprising a one-piece blank, of which a bottom piece (1) and a first and second pair of opposite raised edge pieces (2,3 and 4,5, respectively) are formed, which form side walls and end walls, respectively, and are delimited from the bottom piece. by means of first and second curvature lines (6 and 7, respectively), characterized in that a first pair of opposite edge pieces (2,3), for example those forming the side walls, at both ends of each edge piece have from this projecting support flaps (12), which are delimited from the edge pieces by means of a first folding guide (13), that opposite edge pieces (2,3 and 4,5 respectively) in the raised state diverge slightly in the direction from the bottom piece, that said support flaps (12) in a storage condition, before the carrier fl ices are folded inwards mentioned first folding instructions (13), are located in the same plane as the raised first edge pieces (2,3), whereby the packages with their from this unfilled state are depressible in each other for space-saving stacking of empty bottom piece diverging edge pieces in packages, that the support flaps (12) are provided with locking portions (16), which are arranged that after folding down the support flaps to a support position, where respective support flap (12) rests against an upper edge of second edge piece (4,5), completely protruding outside said upper edge, that the locking portion (16) on the respective support flap (12) is delimited from the support flap otherwise by means of a second folding guide (17), which is designed to form very little resistance to folding down. of the locking portion (16) towards the outside of the second edge piece (4,5), furthermore the package is intended to be closed by means of a plastic film (19) or the like, which is arranged in at applied position to at least cover the upper and upper portions of the respective edge piece (2) of the package. , 3 and 4,5), respectively, and that the locking portions (16), which are delimited from the respective support flap (12) by means of the second folding guide (17) with very little resistance to folding down g, are arranged to be lowered to a folded position in abutment against the outside of the edge pieces (4,5) of the package closing the plastic film (19) during its application. Packaging according to claim 1, characterized in that adjacent edge pieces (2) and (4) are mutually fixed by means of folded and in one piece with said adjacent edge portions corner portions (8), which are delimited from the first pair of edge pieces (2). , 3) by means of third bending lines (9) and from the second pair of edge pieces (4,5) by means of fourth bending lines (10), said third bending lines (9) forming a first obtuse angle with the first bending line (6) and wherein the fourth the bending line (10) forms a second obtuse angle with the second bending line (7), that a fifth bending line (11) is arranged between the third and the fourth bending line, that the corner portion (8) when raising the edge pieces (2,3 and 4,5 respectively ) are arranged to be folded at the third and fourth bending line (9,10) and double-folded around the fifth bending line (11) and that the double-folded corner portions (8) are connected to two opposite raised edge pieces (4,5). Packaging according to claim 2, characterized in that the blank is formed of corrugated cardboard or cardboard laminated with a plastic film, which is arranged on the side which, after rising, forms the inside of the package. Packaging according to claim 3, characterized in that the corner portions (8) are folded outwards around the fifth bending line (11) and in a double-folded state are folded against and fastened to the outside of two opposite edge pieces (4,5). Packaging according to Claim 1 or 2, characterized in that the blank is formed from channel plastic, corrugated plastic or the like. 10 15 20 25 30 * S23 133 15 Packaging according to one of the preceding claims, characterized in that the second folding guide (17), which delimits the locking portion (16) from the carrier flap (12), otherwise has a continuous groove extending along the folding guide, which groove extends over the main part of the folding guide. . Packaging according to one of Claims 2 to 6, characterized in that the first pair of opposite edge pieces (2,3) constitute the end walls (4,5) of the package and that of the package, side walls of the second pair of opposite edge pieces constitute that the corner portions (8) are folded against the end walls and that the first obtuse angle is greater than the second obtuse angle so that with respect to the depth the packages can be pressed into each other when stacking empty packages to compensate for the increase in the thickness of the end walls (4,5) as the double folding of the corner portions (8) entails. Packaging according to one of the preceding claims, characterized in that the first folding instructions (13) each consist of a creasing line (14) and of a continuous folding slot (15) which extends over a part of the folding instruction, the folding slot ( 15) is arranged to reduce the risk of resilience of the support flap when it is folded down. Packaging according to the preceding claim, characterized in that said locking portions (16) are intended to adhere to the outside of the respective edge piece after folding towards the outside of the edge pieces (4,5) in the second pair, wherein adhesion takes place by means of fastening surfaces, e.g. in the form of double-sided adhesive tape, applied to the locking portion (16) and / or the outside of the respective edge piece (4,5).