REINFORCED LIQUID PRODUCT BAG

Abstract

The invention relates to a sachet for liquid products with a frame, according to any one of the claims of the main patent. According to this certificate of addition, said frame 16 is constituted by a long piece 20 folded 22, 24; 23; 25 upon itself and extending from the bottom of the sachet to its top.

Description

Liquid product bag with frame This certificate of addition relates to an improvement to a device which is the subject of main patent application no. 88 14650 filed on March 9, 1988 in the name of the Applicant. More specifically, this improvement aims to facilitate the manufacture and assembly of a frame for a plastic sheet bag intended to contain liquids. For this purpose, this certificate of addition relates to a bag conforming to claim 1 of the main patent, characterized in that the vertical frame is made up of a long piece folded over itself and extending from the bottom of the bag to its top. Thus, thanks to this improvement, it is easy to make frames for bags from sheet plastic material that extend at least twice the height of the bag and close to its side walls. According to various versions of the invention - the long piece is folded twice, which allows to create a frame comprising two vertical arms connected by a horizontal section adjacent to the bottom of the bag, - The long, thin piece is assembled, after folding, by its two ends to an upper crossbar placed at near the top edge of the bag, - the long piece is assembled, after folding, at at the fold level at an upper crossbar placed at near the top edge of the bag, - The two arms of the frame extend towards the bottom in points that are transversely distant from each other; and, optionally, its arms end in portions folded adjacent to the bottom of the bag, - the bag contains two or more such frames, - the elongated piece presents areas of folding by reversible deformation - the Longiligne part has folding zones by irreversible deformation - the reinforcement has at least one area of ​​weakness, - the frame consists of two parallel rods connected by connecting elements. The details and advantages of the invention will become clear upon reading the following description, with reference to the attached drawings, in which: Figure 1 illustrates a bag with an improved frame, Figures 2a and 2b are front and side views of the component constituting the armature, and Figures 3 to 8 illustrate variants of reinforcements. As illustrated in Figure 1, a frame 10 for a bag 12 containing liquids consists of an upper crossbar 14 placed at or near the upper edge of the bag, and a substantially vertical element 16 extending from the upper crossbar to the bottom 18 of the bag, this bottom allowing the bag to be placed in a vertical position and the frame allowing the bag to remain in this position stably, even when it is a large bag, i.e. reaching or exceeding 3 Liters, or even 5. To facilitate the manufacturing and assembly of The armature, this one consists of a Longiline piece 20 illustrated in figures 2a and 2b, folded into two zones 22 and 24 in order to present two vertical arms 26 and 28 on either side of an intermediate horizontal section 3Q extending along the bottom 18 of the bag substantially from the front wall 12av of the bag to its rear wall 12au. The two upper ends of arms 26 and 28 are made integral with the upper cross member 14 by any appropriate means, excluding welding, gluing, fitting, or other. In particular, as illustrated, your arms 26 and 28 can end with flattened tabs 32, 34 received together by force in a Housing 36 provided in the upper cross member 14. Furthermore, as illustrated in figures 2a and 2b, the part 20 can be formed of two parallel rods 38, 40 connected at place by connecting elements 42 separated by windows 44. The bending zones 22, 24 can be defined by thinned portions of the rods 38, 40 and, where applicable, of the connecting elements 42, in order to determine a "reversible" bend, that is to say involving the simple elastic deformation of the material. According to an unrepresented variant, the folding areas are not materialized, except possibly by visual and / or tactile markers, and the folding is carried out irreversibly, i.e. by involving a plastic deformation of the material. It should be noted that, thanks to the invention, a double vertical frame 16 is obtained, the two arms of which 26, 28 run along the front 12av and rear 12ar walls of the bag 12, effectively maintaining it in a taut condition, which prevents any sagging of the bag and its subsequent overturning. The horizontal section 30 also helps to maintain the bottom 18 of the bag in a taut condition in order to provide it with a stable base. Among the suitable materials for making the frame, plastics are preferred, especially those that can be implemented by injection. Various variants are illustrated in the following figures. In figure 3, the frame has a single fold 23, placed near the bottom of the bag, from which the two arms extend to the upper crossbar, assuming an arched shape. In this case, the arms run along the front and back walls of the bag only on about their upper half. This variation may be suitable for small bags. In figure 4, the frame is simply bent over itself and has a loop shape 25. The lower part 30 of the loop runs at least locally along the bottom of the bag, and the lateral parts of the loop constitute the arms 26 and 28 of the frame which run at least locally along the front and rear walls of the bag. Figure 5 illustrates a double frame, that is to say formed of two individual frames 20, 20' of the type of those illustrated in figures 1, 3 or 4, arranged in such a way that their arms 26, 28 and 26', 28' reach the bottom in two areas separated transversely, the two horizontal sections 30 30' running along the bottom of the bag in these areas in order to improve its support in a tensioned condition. This variant will be advantageously applied to large capacity bags with a flat bottom over a certain area. In Figure 6, the frame 20 is of the same type as that in Figure 1, but its two arms have inclinations opposite to the vertical, so that the horizontal section 30 extends substantially diagonally with respect to the bottom of the bag. This can be achieved by giving this horizontal section 30 a length greater than the width of the base and by imparting a slight twist to the entire reinforcement around the median vertical axis XX, this twisting possibly resulting in a permanent deformation of the reinforcement. Once placed in the bag, the reinforcement retains this shape because the The length of the horizontal section exceeds the width of the bottom. In Figure 7, we have shown an armature whose two arms 26, 28 are connected to the upper cross member at two points 27, 29 apart. The lower horizontal section 30 of the reinforcement can be oriented either across the width of the base or diagonally as illustrated. In this case, the shape of The armature can be determined by a slight twist around The median vertical axis XX. Finally, in Figure 8, fold 23 of the frame 20 is located at the upper end of the bag near the upper crossbar 14, and is secured to the latter by being press-fitted into a housing 36. The two arms 26, 28 extend into two sections 30a, 30b folded at right angles and Running horizontally along the bottom of the bag, from one wall to the other or only over a partial distance. Alternatively, as shown in dotted lines in the same figure, fold 23 can be made slightly at an angle, such as Thus, arms 26 and 28 have opposite inclinations relative to the vertical and join the bottom of the bag at transversely spaced points. The horizontal end sections are then also transversely spaced and ensure better support of the bottom under tension. Of course, the skilled craftsman will be able to design multiple variations from what has just been described either by multiplying the number of reinforcements, or by modifying the arrangement of the folds or the curvature zones of the long piece constituting the reinforcement, or even by modifying the shape or the profit of the reinforcement. Finally, the invention also provides, particularly for those variants where the reinforcement has a horizontal section adjacent to the bottom of the bag, that the reinforcement comprises a weakening zone 46, as shown in Figures 1, 2a and 2b along Which horizontal section can be bent or broken, in order to allow the bag to be laid 'flat' when it is thrown away after use.

Claims

DEMANDS 1. Sachet for Liquid products according to any one of the claims of the main patent, characterized in that said frame (16) is made up of a long piece (20) folded (22, 24; 23; 25) on itself and extending from the bottom of the sachet to its top.

2. Sachet according to claim 1, characterized in that The Longiligne piece (20) is curved in a loop (25) and in that its two ends (32, 34) meet at the top of the bag.

3. Bag according to claim 1, characterized in that the Longiline piece (20) has two folds (22, 24) defining between them a horizontal section (30) placed along the bottom of the bag and, beyond them, two arms extending to the top of the bag.

4. Sachet according to claim 1, characterized in that The longiLigne piece has a single fold (23) located near the bottom of the bag and two arms extending from said fold to the top of the bag.

5. Bag according to claim 1, characterized in that the LongiLigne part comprises a single pLi (23) located in the vicinity of the top of the bag and two arms extending from said fold to the bottom of the bag.

6. Bag according to claim 5, characterized in that said arms (26, 28) join the bottom at points spaced transversely apart from the bottom of the bag.

7. Bag according to either of claims 5 and 6, characterized in that the two arms (26, 28) terminate in horizontal folded sections (30a, 30b).

8. Sachet according to any one of claims 1 to 4, characterized in that the two ends (32, 34) of The frame joins the top of the bag at points spaced transversely apart.

9. Bag according to any one of claims 1 to 8, characterized in that the frame also includes an upper crossbar (14) located in the vicinity of the top of the bag, to which said long piece (20) is attached.

10. Bag according to any one of claims I to 9, characterized in that said reinforcement has reversible deformation folding zones.

11. Bag according to any one of claims 1 to 9, characterized in that said reinforcement has areas of folding by irreversible deformation.

12. Bag according to any one of claims 1 to 11, characterized in that said reinforcement has at least one area of ​​weakening (46).

13. Bag according to any one of claims 1 to 12, characterized in that it comprises at least two reinforcements.