ES2310583T3 - OPENING / CLOSING SYSTEM OF PACKING BAG AND PACKING BAG EQUIPPED WITH THIS SYSTEM. - Google Patents

Abstract

The opening/closing system consists of two lengthwise elements a base (11) fastened to the bag on either side of its opening, and a slider (12) that engages with the base in the closed position and separates from it to reveal the opening. The base and slider engage by a system of grooves and projections (30), and the slider has a tab (34, 35) at each end for pulling it open and closed.

Description

Packaging bag opening / closing system and packing bag equipped with this system.

The present invention relates to a system of opening / closing packing bag, and to a packing bag equipped with this opening / closing system.

This bag is particularly intended for packaging of relatively heavy products, in granular form or powdery The bag according to the invention finds an application particularly interesting for the packaging of products from feeding for animals, croquettes or pasta, of food products sold in semi-major, for example coffee, gardening products such as soil, fertilizers or grains, of construction products such as cement or lime, or others.

The packaging of relatively heavy products in granular or powder form it is currently made by of paper bags comprising handles at their ends upper, which form two porting handles. These handles are constituted by reinforced paper bands and are applied on the walls of the bag.

The upper part of these bags is closed by gluing or seams.

These bags have the disadvantage important not to be very easy to open and have to be more or less torn to allow its opening, which makes the flow of relatively inaccurate products and can lead to about spills

There is a bag opening / closing system packaging comprising a profiled longitudinal element that can be embedded in another profiled longitudinal element that presents A complementary way.

This system is not perfectly satisfactory. In fact, it is not very easy to handle and does not have a good tightness In addition, it is inconvenient to get dirty when the product contained in the bag generates dust, as is the case with Food for animals in the form of croquettes. In addition, the assembly of said longitudinal elements may not be sufficiently resistant to allow the use of the system in some bags of packaging containing relatively heavy products.

Existing bags also have inconvenient not to be very practical to manipulate when it comes to invert them in order to flow the product they contain, and the conformation of the openings of these bags is not always well adapted to a controlled flow of the product.

Existing paper bags also have as inconvenient to have a mediocre seal, which raises odor problems in the places of sale for some products, in particular nutrition products for animals of the type croquettes, or fluid exchange problems in general through of the walls of the bag the time necessary for the sale of products, which consists in particular of moisture collection for the product or desiccation of this product.

The walls of those bags may also not be perfectly assembled at the level of the folds that allow  form the bottom or top of the bags, and it happens that openings remain at the level of these folds, which allow the entry into insect bags such as cockroaches. He US 6,059,456 discloses a system of opening / closing according to the preamble of the claim.

The present invention provides for avoiding the whole of these important inconveniences.

It has as its main objective provide an easy-to-handle opening / closing system, which allow an easy and quick opening to perform, which has a good tightness, that does not get dirty when the product contained in the bag generates dust, and being strong enough to can be used in packaging bags that contain relatively heavy products.

The invention also aims to improve notably the manipulation of the bag at the time of spillage of this in view of the flow of the product, and ensure a perfect Control of this flow.

Another object of the invention is to provide a bag that has a perfect seal in particular with regarding odors and humidity.

A supplementary objective is to provide a bag that you have, with respect to the bags according to the technique above, an improved visual appearance, having in particular a reduced tendency to wrinkle and have a bright appearance and smooth.

According to the invention, the system of opening / closing includes:

-

 two longitudinal elements that each form a guiding means in sliding, one of these longitudinal elements being intended to be attached, directly or not, to one of the edges of the bag that delimits the opening that comprises this bag and being the other of these longitudinal elements intended to be joined, directly or not, to the other edge of the bag that delimit this opening;

-

a slide comprising:

(i)

two longitudinal elements that each form a guiding means in sliding, one of these longitudinal elements being intended to be coupled with one of said elements lengths intended to be attached to the bag and that can slide with respect to this one, and the other of these elements being in length intended to be coupled with one of said longitudinal elements intended to be attached to the bag and that they can slide with respect to this one;

(ii)

a middle wall that joins the two longitudinal elements of the slide to each other.

       \ vskip1.000000 \ baselineskip
    

According to the essential characteristic of the invention, the system comprises a flat base part that delimits  at least partially an opening through it and that it comprises the two longitudinal elements intended to be joined to the bag, this base piece being able to receive the slide and being intended to be fixed to the wall of the bag in such a way that the opening that delimits coincides with the opening made in The wall of the bag.

This base piece allows, in addition to the assembly of the system to the wall of the bag, stiffen the areas of the bag that line the opening made in the wall of the bag, so that they favor the displacement of the slider

This middle wall of the slide thus covers the opening of the bag when said longitudinal elements intended to be attached to the bag are attached to the wall of the bag and that said longitudinal elements of the slide remain in coupling with these longitudinal elements intended To be attached to the bag.

The opening or closing of the bag is done simply by sliding the slide with respect to the wall of the bag.

The opening / closing system according to the invention does not imply any assembly by the consumer of an element longitudinal with another, but simply the displacement of the sliding with respect to the longitudinal elements intended To be attached to the bag.

This opening / closing system is easy to handle and allows easy and quick opening of the bag. I dont know it gets dirty when you equip a bag that contains a product that generates powder, this powder being extracted from the guiding means that said longitudinal elements form at each displacement of the slider

In the closed position, the slide covers completely opening the bag, which allows a closure With a good tightness.

In addition, the two pairs of elements longitudinal confer the system according to the invention a resistance that allows the use of this system in some Packaging containing relatively heavy products.

Advantageously, the slide comprises minus one leg intended to be held by the user to perform the sliding of the slide. Can in particular understand one leg at each end that allows traction displacement on these legs in the direction of the opening and then in the sense of closing the bag.

Preferably, said longitudinal elements intended to be attached to the bag and said longitudinal elements  of the slider are shaped to be put in snap coupling, which greatly facilitates the manufacturing and assembly of the system.

Advantageously, said longitudinal elements intended to be attached to the bag, said slide, and / or said longitudinal elements of the slide comprise means which form limiting stops on the displacement of the sliding in the direction of the opening of the bag.

That cap allows to eliminate the risk of leaving the longitudinal elements of the slider out of coupling  with the longitudinal elements intended to be attached to the bag.

These same longitudinal elements intended to be attached to the bag, this slider and / or these elements slider lengths may also comprise about means that form limiting stops on the displacement of the sliding in the direction of the bag closure, which allow Clearly define the closing position of the slide.

This net definition of the closing position of the slide greatly reduces the risk of mishandling of the system.

Advantageously, the slide comprises a gripper leg attached to it by a joint portion, and extends on one side of said base piece while said gripper leg is extends to the other side of the base piece, said portion being union thus introduced through the opening that delimits the piece base.

The latter can thus be fixed against the face inside the wall of the bag, which allows it to be masked and mask the slide that it comprises. In addition, only the leg of grip protrudes on the outside of the bag, which has as advantage make the system manipulation evident to the consumer, that is, the grip of this gripper leg in view of sliding of the slider.

Preferably, the base piece delimits the entire opening comprising, in particular the ends of this opening, and the areas of this base piece that delimit these ends of the opening, as well as said joint portion, are sized to constitute said limiting stops of the sliding of the slider.

Advantageously, each of said zones of the base piece that delimit one end of said opening forms a fin that forms protruding in the direction of the interior of this opening.

The fins thus constituted are coated by said joint portion in the closed position, which ensures a perfect seal to the opening / closing system according to the invention.

These fins preferably have a shape substantially semicircular.

The bag according to the invention is, in turn, provided with an opening / closing system such as that mentioned previously.

Preferably, this bag comprises:

-

 two walls attached to each other at the level of their upper parts, at along a joining line of which one has said opening along this junction line and in the vicinity of it, Y

-

a handle arranged at the level of these upper parts, in the area mean of said joining line.

A traction exerted on the handle in view to lift the bag causes an elevation of the middle area of said connecting line with respect to the extreme zones of this, which It tends to approximate these two extreme zones to each other. This approach tends to confer a concave curvature to the bag by above said opening and, correspondingly, a convex curvature to the bag below this opening. This simple elevation tends thus to form a product flow channel.

Bag manipulation in view of a Investment for product flow is particularly simple to perform since it is enough, after said cutout has been done, take the handle with one hand to lift the bag, take the bottom of the bag with the other hand and lift this bottom until the product slides in the channel.

Advantageously, the walls of the bag attached they extend to each other above said joining line of so that they form a band with double walls, and this band it comprises openings that allow said handle.

This handle is thus made in a way simple, easy and inexpensive, and it is particularly solid, which ensures total security in terms of the resistance of this handle in the course of transporting the bag.

Preferably, the walls of the bag are of synthetic material that can be welded.

This weldability allows obtaining a perfect tightness, which eliminates the diffusion problems of smells as well as fluidic exchanges between the interior and the outside of the bag, or insect penetration inside of the bag.

In addition, the use of such material allows obtaining a bag that has an improved visual appearance, which results in particular from a reduced tendency to wrinkle and from a shiny and smooth appearance.

This material can be formed by extrusion called "bubble" with a structure polyethylene-EVOH-polyamide-polypropylene,  and any type of medium, low or high density polyethylene, and be complexed on aluminum, polypropylene, polyester, polyester aluminized, paper, etc.

This material is presented by its structure, perfect tightness with respect to fluidic transfers between inside and outside the bag.

The problems of diffusion of odors and of moisture collection or product drying time of Exposure of the bags for sale are thus eliminated.

       \ global \ parskip0.950000 \ baselineskip
    

For your good understanding, the invention is will describe again below with reference to the plane schematic annex that represents, by way of example no limiting, a preferred embodiment of the bag of packaging to which it refers.

Figure 1 is a perspective view;

Figure 2 is a partial view, to scale enlarged, in section according to line II-II of the Figure 1;

Figure 3 is a view similar to Figure 1 after opening, in the conformation it takes when it is pulled by traction on a porting handle comprising in its upper part;

Figure 4 is a cross-sectional view. of the opening / closing system comprising;

Figure 5 is a perspective view of two parts that constitute this system, before assembly;

Figure 6 is a view of the system of opening / closing similar to figure 5, after assembly of said pieces; Y

Figures 7 to 11 are sectional views cross-section of different possibilities of realization of elements Sliding guide lengths, comprising this system.

The figures represent a packing bag 1, particularly intended for packing a product relatively heavy, granular or powdery, such as croquettes for the feeding of animals.

Bag 1 has two main walls 2 and two side walls 3 of smaller dimensions.

These walls 2, 3 are of a material that can be heat welded

The main walls 2 are attached one to the another at the level of its upper parts, by heat welding, at along a joint line 4, and each wall 3 is joined by heat welding to adjacent wall 2, along lines of union that extend line 4.

The walls 2 extend above the line 4 so that they form a band 5 with double walls in the middle part of the bag 1.

The walls 2, 3 comprise two openings 6 practiced in the middle zone of band 5, which allow to form a handle 7 for carrying and bag handling 1.

Two pieces of material can be applied on the inner face of the walls 2 at the level of these openings 6, in order to reinforce these walls at the level of these openings.

Wall 2 has a precut that delimits a band 9 below and along line 4, and comprises a closure system 10 fixed on its inner face below this band 9, as shown in figure 2.

Band 9 has rounded ends, which they are trimmed and can thus be raised and held to allow the removal of this band 9 by manual traction.

As figures 4 show more particularly to 6, the closure system 10 comprises a base piece 11 and a slide 12.

The base piece 11 is of a synthetic material liable to be fixed to wall 2 in particular by heat welding. It has an elongated shape and some rounded ends, and delimits a central opening 15 in the form of groove.

On one of its faces, it comprises two elements longitudinal profiles 20 forming guides, which are extend along the edges of piece 11 delimiting longitudinally opening 15, beyond the ends of is.

Each of these elements 20 can have a of the forms represented on an enlarged scale in the parts Bottoms of Figures 7 to 11, namely:

-

two parallel longitudinal walls 21 provided with ribs exteriors 22, as shown in figure 7,

-

two parallel longitudinal walls 21 provided with internal returns 22 in different ways, as shown in figures 8 to 11.

In all cases, these ribs and returns 22 are shaped to allow crimping of elements 30 represented in the upper parts of figures 7 to 11 in the elements 20 depicted in the lower parts of figures 7 to 11.

       \ global \ parskip1.000000 \ baselineskip
    

Each of the elements 20 may present a middle rib 23 that forms a supplementary surface of sliding, as shown in figure 8.

With reference again to figures 4 to 6, it appears that the base piece 11 presents, at the level of one of its ends, a transverse groove 24 sized to receive the slide 12 through it, with the possibility of glide.

In addition, zones 11a of part 11 which delimit the ends of the opening 15 form fins 25 semicircular

The slide 12 comprises two elements longitudinal profiles 30 of which each can have one of the shapes represented on an enlarged scale in the upper parts from figures 7 to 11, namely:

-

two parallel longitudinal walls 31 having grooves interiors 32 suitable to be engaged by crimping on the ribs 22 of the element 20, as shown in Figure 7, or

-

one or two walls 31 with external crimping ribs 32 appropriate to be coupled by crimping on returns 22 of elements 20, as depicted in figures 8 to eleven.

This or these walls 31 can be received against the background formed by the elements 20 or, as the Figure 8, on the additional sliding rib 23.

With reference again figures 4 to 6, it appears that the elements 30 extend parallel to each other and are shaped and positioned so that they remain in coupling by coupling with the elements 20, allowing this the sliding of the slide 12 with respect to the base piece 11.

The slide 12 has a middle wall 33, which links the elements 30 to each other, and comprises two parts rounded 34, 35 attached to its ends, which have a width superior to yours. These rounded parts 34, 35 form some traction legs that can be grabbed by the consumer and that facilitate sliding of the slide 12.

One of these legs 34 is separated from the slide 12 by two transverse grooves, which delimit a connecting portion 36 of the leg 34 to the slide 12, having this junction portion 36 a width less than the width of the opening 15.

The other leg 35 is adjacent to the slide 12 and forms two appropriate transverse flanges 37 to fit leaning against zones 11b of piece 11 that delimit the opening 24.

The slide 12 further comprises a piece transverse 38 fixed to it in the vicinity of the grooves that separate the slide 12 from the leg 34. This piece 38 protrudes to both sides of the slide 12 and can become supported against zones 11b of piece 11.

As understood by comparison of the figures 5, 6 and 4, the slide 12 is intended to be introduced to through slot 24 in such a way that elements 30 can remain in engagement with the elements 20 by crimping the ribs or grooves 32 behind returns or ribs 22.

Leg 34 is inserted through the slot 15 and therefore extends from the side of the opposite piece 11 that on which the slide 12 is located, extending said junction portion 36 through opening 15.

The portions of piece 38 that protrude to both sides of the slide 12 rest against the piece eleven.

As understood with reference to Figure 6, the slide 12 can be displaced with respect to the part 11 between a position of complete concealment of the opening 15 and a position of complete release of this opening 15. In the position completely concealed, the connecting portion 36 is applied against the fin 25, which ensures a closure of the opening 15 with good sealing, and edges 37 are applied against said zones 11b, thus clearly limiting the race of sliding of the slider 12. In the full position release of the opening 15, the portions of the piece 38 that protrude on either side of the slide 12 are applied against zones 11b of piece 11, also limiting the stroke of sliding of the slide 12.

In practice, as the reference appears with Figure 1, the band 9 is started in a way that allows access to system 10 and to eliminate slippage of leg 34, and by both of the slide 12.

Leg 35 is grabbed by the consumer and is displaced in the direction of the opening of the bag 1.

The handle 7 is next grabbed, which causes an elevation of the middle zone of line 4 with respect to the extreme zones of this one, and it tends to approximate these two zones extreme to each other. This approach tends to confer a concave curvature to the top of bag 1 and correlatively a convex curvature to the part of the wall 2 located under system 10, as shown in figure 3. This elevation thus allows to form a channel 40 of the product flow.

Handling of bag 1 in view of a Investment for product flow is particularly simple to perform since it is sufficient to grasp said handle 7 with a hand to lift the bag, grab the bottom of the other bag with the hand and lift this bottom until the product slides in the channel 40

After pouring, the closure of the bag 1 is performed simply by gripping leg 34 and moving the slide 12 until concealment of the opening 15.

As it appears in the above, the invention provides a bag opening / closing system of Easy to handle packaging, which allows easy and quick opening to perform, which has a good tightness, which does not get dirty when the product contained in the bag generates dust, and being strong enough to be used in some bags of packaging containing relatively heavy products.

The invention also provides a bag of packaging whose handling is markedly improved and whose tightness is perfect in particular with regard to odors and to humidity.

Of course, the invention is not limited to the embodiment described above by way of example if not that it understands on the contrary all the variants of embodiment defined by the claims. So, the bag can be the type with welded bellows edges, as has been represented in the figures, and may be of the bottom type square or with bottom bellows, or it may also be devoid of bellows.

Claims (15)

1. Bag opening / closing system (10) packaging (1), which has an opening made in one of its walls (2), delimited by edges of this wall (2), which understands:

-

two longitudinal elements (20) that each form a means of guided in sliding, being one of these elements Longitudinal (20) intended to be attached, directly or not, to one of the edges of the bag (1) that delimit the opening that present this bag and the other of these elements being Longitudinal (20) intended to be attached, directly or not, to the another of the edges of the bag (1) that delimit this opening;

-

 a slide (12) comprising:

(i)

 two longitudinal elements (30) that each form a means of guided in sliding, being one of these elements, longitudinal (30) intended to be coupled with one of said longitudinal elements (20) intended to be attached to the bag (1) and that can slide with respect to this, and the another of these longitudinal elements (30) destined to remain in coupling with one of said longitudinal elements (20) intended to be attached to the bag (1) and that can slide with regarding this;

(ii)

a middle wall (33) that joins the two longitudinal elements (30) from the slide (12) to each other,

characterized in that it comprises a flat base part (11) that delimits at least partially an opening (15) through it and that has the two longitudinal elements (20) intended to be attached to the bag (1), thus being able to base piece (11) receiving the slide (12) and being destined to be fixed to the wall of the bag (1) such that the opening (15) that delimits coincides with the opening made in the wall (2) of the bag (1). 2. Opening / closing system (10) according to claim 1, characterized in that the slide (12) comprises at least one leg (34, 35) intended to be held by the user to perform the sliding of the slide (12) . 3. Opening / closing system (10) according to claim 2, characterized in that the slide (12) comprises a leg (34, 35) at each end. 4. Opening / closing system (10) according to one of claims 1 to 3, characterized in that said longitudinal elements (20) intended to be attached to the bag (1) and said longitudinal elements (30) of the slide (12) they are shaped to be able to be carried in coupling by hooking. 5. Opening / closing system (10) according to one of claims 1 to 4, characterized in that said longitudinal elements (20) intended to be attached to the bag (1), said slide (12), and / or said longitudinal elements (30) of the slide (12) comprise means (11b, 38) that form limiting stops of the sliding of the slide (12) in the direction of the opening of the bag (1). 6. Opening / closing system (10) according to one of claims 1 to 5, characterized in that said longitudinal elements (20) intended to be attached to the bag (1), said slide (12), and / or said longitudinal elements (30) of the slide (12) comprise means (11a, 36, 37) that form limiting stops of the sliding of the slide (12) in the direction of the closure of the bag (1). 7. Opening / closing system (10) according to claim 1, characterized in that the slider (12) comprises a gripping leg (34) attached thereto by a connecting portion (36), and extends to one side of said base piece (11) while said gripper leg (34) extends to the other side of the base piece (11), said connecting portion (36) being thus inserted through the opening (15) delimiting the base piece (11). 8. Opening / closing system (10) according to claim 7, characterized in that the base piece (11) delimits the entire opening (15) comprising, in particular the ends of this opening, and because the areas (11a ) of this base piece (11) that delimit these ends of the opening (15), as well as said joint portion (36), are sized to constitute said stops limiting the movement of the slide (12). 9. Opening / closing system (10) according to one of claims 1 to 5, characterized in that each of said areas (11a) of the base piece (11) that delimit one end of said opening (15) forms a fin (25) which forms in the direction of the interior of this opening (15). 10. Packaging bag (1) equipped with the opening / closing system (10) according to one of claims 1 to 9. 11. Packaging bag (1) according to claim 10, characterized in that one of its walls (2) has a precut that delimits a band (9) and that said opening / closing system (10) is fixed on the inner face of this wall (2) below this band (9). 12. Packaging bag (1) according to claim 10 or claim 11, characterized in that it comprises:

-

two walls (2) joined to each other at the level of their upper parts (5), along a joining line (4), of which one presents said opening of the bag, practiced along this line of union (4) and in the vicinity of it, and

-

 a handle (7) arranged at the level of these upper parts (5), in the middle zone of said connecting line (4).

13. Packaging bag (1) according to claim 12, characterized in that its walls joined to each other extend above said joint line (4) so as to form a band with double walls (5), and because this band (5) has openings (6) that allow said handle (7) to be formed. 14. Packaging bag (1) according to one of claims 10 to 13, characterized in that its walls (3) are made of synthetic material that can be welded. 15. Packaging bag (1) according to claim 14, characterized in that said material is constituted by extrusion called "bubble" with a polyethylene-EVOH-polyamide-polypropylene structure, and any type of medium, low or high density polyethylene, and It can be complexed on aluminum, polypropylene, polyester, aluminized polyester, paper.