JPH07504875A - Packaging made from thin pleated sheets forming bags for bulk products - Google Patents

Abstract

A sheet including at least one pleated region (13) with end-fastened folds (3). The sheet is folded in half in a direction perpendicular to that of the folds (3) and at least one of its ends (15) is sealed by fastening together the edges to give a receptacle suitable for loose goods. The receptacle may then be extended out to provide a fully or partially sealed package.

Description

[Detailed description of the invention] Packaging made from thin pleated sheets forming bags for bulk products The present invention is particularly, but not exclusively, applicable to bulk products such as chips (in the text A pleated product (referred to as "loose product" in the text) can be packaged. It relates to packaging made from thin sheets (or films).

Patent FR-A-2595666 discloses a pleated thin material in which the ends of the pleats are fixed. Patent FR-A-2628719, which features a convex package made of sheets, is Several ways of fixing the fins are set out in the claims. Patent FR-A-2676037 is a package made of paper, a part of which is pleated and stretched. It can be unfolded and other parts are not pleated, and this unpleased part is not pleated. consisting of the same sheet as the pleated part or a different sheet fixed to the end of the pleated part. Describe the package that was used. This package is used to package convex articles with a relatively stable shape. This is what I am trying to do. However, all of those packages are clumped together. Stretch the package around the item because its shape is not stable. Therefore, such non-agglomerated articles cannot be packaged. French patent issued Application No. 91-11965 proposes a pleated paper that can be stretched to solve this problem. Provides for combining the sheet with a cardboard receptacle. The product is a cardboard receiver and then use the cardboard receiver as a convex support to insert the paper sheet. Stretch G. Although this solution provides relatively good-looking packaging, it uses cardboard Since it is used, the price is high. Furthermore, the solution is to use a rigid sheet with a complex shape and folds. In order to combine the two types of sheets with a flexible sheet, the two types of sheets are A disadvantage is that it creates a risk of seam breakage.

The object of the present invention is to provide the In particular, it is an object to provide packaging for bulk products.

The accompanying drawings show embodiments of the packaging according to the invention.

FIG. 1 shows a package according to the invention that has not yet been stretched.

FIG. 2 shows an unstretched package of the invention with a gusseted bottom.

FIG. 3 shows the package of FIG. 1 unfolded.

Figure 4 shows the package of Figure 2 stretched into a shape such that the pleats can form receptacles; shows.

FIG. 5 shows a package of the invention with an unpleated portion connected to the end of the package. Show variations.

FIG. 6 shows the package of FIG. 5 unfolded.

Figure 7 shows a variation of the package shown in Figure 5, with the non-pleated portion forming a bag. a wrapper having one end thereof fixed to the body and the other end joined to the pleated portion; Figure 8 shows a variation of the package shown in Figure 5, with pleats that can be stretched instead of pleated parts. Figure 3 shows the package provided with a pleated portion that is secured in place.

Figure 9 shows the package of Figure 8 when sealed by stretching the pleated part. show.

Figure 10 shows a variation of the package shown in Figure 8, in which the pleats are not fastened and the pleated parts are stretched. The package is shown being allowed to stretch before being unfolded and closed.

FIG. 11 shows the package of FIG. 10 fully expanded.

FIG. 12 shows the package of FIG. 6 after being turned over and opened.

FIG. 13 shows a staggered edge package according to the invention.

FIG. 14 shows the film with a hem created at the edges prior to shirring.

Figure 15 shows said film pleated with an indication of the fixation area of the pleats. vinegar.

Figure 16 shows the bag with the pleats loosened to enlarge the opening of the bag.

Figure 17 shows a bag of the invention containing a sandwich.

Figure 18 shows the sandwich of Figure 17 sealed by a flap. Showing the bag.

Figure 19 shows the bag of Figure 17 with the pleats stretched to widen the opening of the bag. shows.

FIG. 20 shows a cross-sectional view of the pleated area of FIG. 15 located on the underside of the lip.

In a first variant of the invention, the pleated packaging is manufactured by patent FR-A-259566 6 and FR-A-2676037, from thin sheets. Made. The pleats are substantially flat and rectangular. The package is folded back (Figure 1), This folding is such that fold 1 or fold 2 (Figure 2) is perpendicular to fold 3 (Figure 1). It is then done to form a package. Next, the side edges 4 and 5 are The thin sheets are fastened together by means suitable for the material to form the bag. appropriate fold Depending on how you bend the bag, make a gusset 6 at the bottom of the bag (Figure 2) and insert the strip at the bottom of the bag. The pace may be increased. This bag (Figure 1 or Figure 2) Advantageously used in the Firth i-Food industry as a replacement for traditional chip cones. I think you can do it. This bag is made of a composite of e.g. a thin layer of paper and polyethylene. The fastenings at the ends 7 and side edges 4 and 5 of the pleats 3 are welded (vc lding). Such bags are the same as cardboard cones Like, you can stuff it with chips. Similar to the cone, this bag also supplies Serves as a measuring device for the amount of chips to be served. First pleat with pleat 3 The thickness of the paper is several sheets at a time, so your hands are protected from noise while working. folds The ratio between the small side and the large side of this is as stated in the said patent. Plan so that the thickness is at least three sheets of paper by choosing the sea urchin appropriately. be able to.

If the ratio is greater than 2, areas of three thicknesses alternate with areas of only one thickness. and if the ratio is less than 2, it will be at least 3 sheets thick. bag When an equivalent amount of chips is placed in (Fig. 1), the bottom part 8 can be By letting it cool, the folds 3 can be stretched. This makes the volume of the bag The chips grow larger (Figure 3) and then fall into the cavity where they are kept warm. .

But in the meantime the original opening 10 is retained and acts as a vent and again the opening of the lips. It will be partially closed like this. The bag thus stretched and formed is If you place it on the rate, it will maintain a stable position. Bags according to the shape of the folds Depending on how the height 29 is determined relative to the degree of extension (Figures 3 and 4), Create a mass effect that prevents chips from coming out when the bag is turned upside down. can. For example, if the side ratio of the pleats is large, e.g. greater than 2, the height 29 is When the radius is substantially equal to 30, the profile of the stretched pouch (FIG. 3) is 1 It is formed by both welding lines 4 and 5 that form an angle 11 smaller than 80°, and the radius It resembles a sector of a torus made up of two concentric arcs separated by a circle.

Especially if the above angle is small, the chips will rather open when the pouch is turned upside down. Guided towards the mouth. The ratio of the sides of the folds is small, for example, the height 29 and the radius 30 are the same If the side welding latitude remains as it is and its side ratio is on the order of 1.5 (Figure 4), then the side weld latitude The radius angle 11 formed by ins 4 and 5 is wider than 180°. The bag is shaped like a kind of horn, here the bag is turned upside down. From the opening 10 which can accommodate chips even when the It won't fall. In either case, the consumer withdraws the chips to eat them. Insert your finger into the opening of the extended bag (Figures 3 and 4) can. Bags with gusseted bottoms (Figures 2 and 4) and bags without gussets The carrying bag (FIGS. 1 and 3) is equally illustrated. mentioned earlier The solution is the same as below (applies equally to both bottom 1 and 2 folding types) It will be done. One of them will be described below.

Another method of making a receptacle is the type described in patent application FR-A-26767030. You can start with a pleated package. In this package, the pleated portion 13 has no pleats. For example, it is made by folding a semi-hard crepe in half. It can be used to wrap Zandwiches. This package is folded back and can be gusseted, and only one end 15 of the non-pleat portion is fastened. It will be done. The product is placed in the pleated part 14 so as to fill it properly, and then and cooperates with the unfolded part to form a coagulated aggregate. This aggregate is pleated It is sealed by extending the open portion 13 (FIG. 6). The pleat length is different from 17. The same result can be obtained using a non-pleated portion 14 with convexity 16. Such a person The blank part must be added separately as described in patent application FR, -A-2676037. and is joined to the pleated portion 13. The aggregate is wrapped as described above. and the end 15 of the unpleated portion 14 is joined to itself. This type of packaging One of the advantages is that it can be inverted to support the extended section 13 (see Figure 6). Next, lift the un-folded part 14 like a cover to make it into a bowl shape. The loose product contained in the extension part 13 can be taken out (Fig. 12). .

In one variant of the embodiment of the invention described above, the ends 19 and 20 are fixed together. The non-pleated sheet 18 (FIG. 7) covers by stretching the pleated portion 21. 1. As a further improvement of the embodiment of the invention described in 1. In place of the folded portions 14 or 18, a pleated sheet 22 (FIG. 8) is provided. child The pleats of the sheet have the same pitch or a different pitch as the pleated portion 23 at the ends thereof. It can be fastened with a chi. The tabs 24 made in this way are if they are not stretched. and can act as a heat insulator. If necessary, remove these folds 24. one or more folds perpendicular to the direction of the folds 24 to prevent them from stretching. A bond may be made along line 25. In this way, the above-mentioned package (Fig. 5 and A heat-insulating package (FIGS. 8 and 9) is obtained which is used in the same way as FIG. 7). or, The pleats 26 (Fig. 40) are allowed to stretch without being fastened, forming a kind of receptacle 27. may be completed. This receptacle has a pleated portion 28 when expanded with a product in it. The opening can be sealed by stretching and covering it. The above variations are already The gusset is associated with the pleated portion 13 (FIG. 5) and the non-pleated portion 14 as described above. It also applies to packages with a contoured bottom 6 (FIG. 2). therefore there The drawings shown are illustrative and not restrictive. Similarly, all of them In the variation, a pleated part 22 (the first part) is used instead of the part without pleats. (Fig. 8) or without the pleats 26 (Fig. 10). Ru.

In order to easily open the pleated bag, the edges 31 and 32 (Fig. 13) may be shifted. The wall 33 of the bag corresponding to the longer edge 32 is The other’i to open the bag! It is used as a guide when releasing 31. those For example, if a paper sheet is coated with polyethylene on one side, If the pleat 34 is fixed by the edge 35, the two edges 31 and 3 The gap 36 between 2 and 2 is thicker (preferably) than the height of the hem 35. When the welding 14 of parts 4 and 5 is performed, the lip 35 of the rear edge 32 is made of polyethylene. contacting the other wall 33 with a coating of and therefore being able to be fixed to this wall. can. By making the offset 36 between the two edges 31 and 32 much larger, One of the two walls 41 (Fig. 17) is used as a flap to close the casket. The bag can then be sealed (FIG. 18). made like that The presence of pleats improves at least a portion of the surface of the bag. 42 (Figure 20) is the thickness of at least three overlapping sheets of paper 43.44.45. and thus provide more effective insulation against heat loss in those areas.

The pleated film will start tearing from its edges and keep the bag from tearing. When it is desirable to be able to stretch the folds to open them (Figure 16) Before pleating (Fig. 15) the film 47 (Fig. 14), the edges 46 ( Figure 14). Such a hem 46 can be formed by any known method depending on the material. It can be made by fastening in steps, and the edge 48 is directly subjected to tensile force. to prevent Next, pleats 49 are secured together, preferably on one side of the film. (Figure 15). This fixation can be achieved, for example, by fixing sheets 44 and 45 (FIG. 20). By welding the outer coating of film, if applied, Also, for example, by adhesive or adhesive coating or by applying glue directly to the film surface. This will cause the sheets 43 and 44 to be glued together. Not possible. For example, if polyethylene coated paper is used, the edge 4 6 (Fig. 14) is made with the plastic inside the flap, and the hem 46 are welded at 50 locations. To give one specific example, 150g of chips In the case of a package containing .

The pleats are then made (FIG. 15) and the pleats are placed adjacent to the hem 46. The paper is fixed by direct heating in the area 51 where it is fixed. This fixation is Walls 52 and 53 (Fig. 20) of polyethylene lined sheets 44 and 45 are aligned. They are brought into contact with each other and secured together by welding. Corresponds to hem 46 Since the pleated area 54 (Figure 15) has only paper walls, No fixation of the folds takes place and therefore a direction perpendicular to these folds is used to stretch the folds 34. Even when the folds 34 are pulled in the area 55, no stress is applied to the folds in the area 54. do not have. In contrast, in the area 51 where the securing of the pleats takes place, both mutually opposite A common polyethylene coating is applied to walls 52 and 53 on the side perpendicular to the pleats 34. It is pulled away from one wall by a tensile force 55 applied in the direction. This peeling is In the method of fixing pleats as described above, the welded part acts as if it were to be peeled off, causing shearing. It is easily performed because it does not act on force. Depending on the purpose, other sections of the bag may be used. areas, especially the folds 34 (Fig. 15) in the area near the bottom 56 (Fig. 16), as described above. You can fix it in the same way. In fact, like making your bag into a basket shape. , it may be desirable to widen the opening 54 of the bag without stretching its bottom, or vice versa. , only the bottom 56 of the bag is expanded and the opening is sealed again to maintain a good temperature of the contents. There are times when you want to do this.

The bag of the present invention can be used to hold sandwiches of various shapes. (Fig. 17). Seal the bag (Figure 18) on the long side. The flap 41 made of This can be done by Sandwich 59 in the bag (Fig. 17) ), separate the two edges 60 (Fig. 19) of the bag to measure its dimensions. It is sufficient to make it large and expose a portion of the sandwich 59. Pull out from the package. There's no need to. This bag is especially suitable for long sandwiches.

Copy and translation of written amendment) Submission form (Article 184-8 of the Patent Law) September 1994 264 opposition

Claims (10)

[Claims] 1. Made from a thin sheet with asymmetrical pleats (3) with fixed ends (7) in a package for accommodating a bulk product; at least one pleated section; and said pleated part so as to form a bottom (8) with a gusset (6). folded back perpendicular to the direction of the folds (3) of the part and of its ends (4, 5) At least one side is sealed, thereby pulling the corner (9) characterized in that the bag is constructed such that it can be fully or partially extended by The above-mentioned packaging. 2. said pleated end (13) of a width (16) equal to or different from the width (17); A pleat-free area (14) provided in direct alignment with the direction of extension of the pleat; The blank area may be made from the same sheet as the pleated section or may be an additional section. the end (15) of which is sealed and used as a receptacle for bulk products; characterized in that the pleated portion (13) can be stretched to seal the receptacle. The package according to claim 1. 3. The unpleated portion is sealed at its end (19) and separated at the separation area (20). sealed by a pleated portion (21), whereby said pleated portion (13) A claim comprising a bag that can be sealed by stretching the bag. Packaging in item 2 of the scope. 4. Folds (22) are provided in place of the non-folded portion (14), and these pleats is fixed at its ends and along one or more lines (25). This prevents stretching and allows several sheets to overlap. The package according to claims 2 and 3, characterized in that the package is provided with heat insulation properties. . 5. Before the receptacle is sealed as a whole by extension of the other pleated portion (28) It is assumed that only the ends of some of the folds (26) are fixed so that they can stretch. The package according to claim 4, characterized in that: 6. A bag made from pleated film, the pleats being asymmetrical. The edges are fixed and the bag can be folded back perpendicular to the direction of the folds. The bottom part (6) is formed and its folding creates two walls, these walls are joined to each other at edges (4 and 5) parallel to the direction of the pleats. In a bag where three sealed sides are made, the edges (31 and 32) The wall (33) has a curve (36), thereby corresponding to the longer edge (32). A bag characterized in that the can act as a guide when opening the bag. 7. The offset (3) allows the edge (31) to be fixed to the wall (33). Claim 6, characterized in that 6) is greater than the height of the lip (35). The bag of the term. 8. The edges (48) of the film (47) are made before shirring to avoid tearing. according to claim 6, characterized in that it is protected by a lip (46) that is bag. 9. The temporary fixation of the pleats in the areas (51) are on the same side of the film and opposite each other. This is done by fixing the walls (52 and 53) of each pleat, where the sheet (4 4 and 45) are glued together by a layer of material applied to the film, while the sheet (4 3 and 44) are left unbonded, which allows for tension in the direction perpendicular to the folds. By applying force, the folds are stretched and the sheets (44 and 45) are broken. The bag according to claim 6, characterized in that the bag can be peeled off without any damage. Gu. 10. The same type of temporary fixation is provided in other areas of the bag, especially near the bottom (56). 10. Bag according to claim 9, characterized in that: