WO2019068418A1

WO2019068418A1 - Closing device for a bag

Info

Publication number: WO2019068418A1
Application number: PCT/EP2018/074244
Authority: WO
Inventors: Sven Larisch
Original assignee: Cofresco Frischhalteprodukte Gmbh & Co. Kg
Priority date: 2017-10-06
Filing date: 2018-09-10
Publication date: 2019-04-11
Also published as: PL3691975T3; ES2906284T3; HRP20220137T1; DK3691975T3; DE202017106084U1; PT3691975T; EP3691975A1; EP3691975B1

Abstract

The invention relates to a closing device for a bag (1) comprising two closing strips (4, 5), which have profiled strips (10, 11) that can be locked to each other and which can be opened and closed via a slider (6), wherein the slider (6) is movable in the longitudinal direction of the closing strips (4, 5), engages around the closing strips (4, 5) in the shape of a U and has two side walls (15, 17) and a connecting section (19) connecting the side walls (15, 17), wherein, on the connecting section (19), a projection (20, 20') at least partly engaging between the closing strips (4, 5) to open the closing strips (4, 5) and, at a distance from the projection (2), two pressure pieces (24, 24') bearing on the outside of the closing strips (4, 5) to close the profile strips (10, 11) are provided. As seen in plan view of the connecting section (19), the projection (20, 20') has a wedge-shaped section having two spreading side walls (22), wherein the projection (20, 20') has a maximum width of more than 1.5 mm. This improves the handling and sealing of a bag having the closing device.

Description

Closure device for a bag

The present invention relates to a closure device for a bag with two closure strips having interlockable profile strips which can be opened and closed by a slider, wherein the slider is movable in the longitudinal direction of the closure strip, the closure strip U-shaped embraces and two side walls and a has the connecting portion connecting the side walls, wherein at the connecting portion an at least partially engaging between the closure strip projection for opening the closure strip and spaced from the protrusion two externally applied to the closure strip plungers are provided for closing the profile strips.

WO 2013/192287 A2 discloses a bag with a closure device which has two profile strips which can be opened and closed via a slide. The slide has for this purpose a web-shaped projection which can be inserted between the profiles of the closure device. Spaced apart from the projection, two thrust pieces are provided to open the closure strips in a direction when the slider is moved in one direction and to close them in the opposite direction. A disadvantage of this closure device is that the user hardly recognizes whether the closure strips are open or closed when the slider is in the center position, because the distance between the closure strip is very low both in the open and in the closed position and hardly achievable with the eye be recognized, which makes handling difficult. In addition, there is the disadvantage that the sealing of the closure strip is inadequate and leakage may occur, especially with liquids in the bag.

It is therefore an object of the present invention to provide a closure device for a bag, which allows improved handling and sealing. This object is achieved with a closure device having the features of claim 1.

The closure device according to the invention comprises on the slide at a connecting portion a projection for opening the closure strip. fen seen in plan view of the connecting portion has a wedge-shaped portion with two aufsprreizenden side walls. As a result, the closure strips can better attach to the projection, which leads to fewer gaps and thus to an improved seal. In addition, the opening width can be widened by the wedge-shaped contour, so that the user recognizes by a view of the closure strips on opposite sides of the slider, which side is the opening side and which is the closure side. The projection has a maximum width of more than 1, 5 mm in plan view.

Preferably, the projection on the side opposite to a tip has a width of more than 1.7 mm, for example between 1.8 mm and 2.5 mm. As a result, the closure strips are held on the opening side at a distance of about 2 mm, which is visible to the eye and thus improves the handling compared to prior art slides, in which the closure strips are opened only by about 1 mm.

In a further embodiment, the projection has a length in the sliding direction of more than 3 mm, for example between 4 mm and 6 mm.

As a result, the projection can taper in a wedge shape with a section and open the profile strips during a movement with gentle pressure. Spaced from the top of the projection, pressure pieces are preferably provided, which are arranged in the sliding direction less than 4 mm, in particular between 1 mm to 3 mm. These plungers are on the outside of the profile strip and press together with a sliding movement in the closing direction, the short distance to the projection ensures a good seal. In the transition region between the open and closed positions of the slide over the projection a possible positive engagement of the profile strips cause with small gaps, so that the seal against liquids is improved. In addition, the connecting section can also cover any gaps if the projection is provided within the connecting section as seen in plan view.

The projection may have a trapezoidal section as viewed in plan view with end walls converging towards the end. As a result, the projection in plan view is approximately diamond-shaped and can be mounted during assembly on the closure strip from both sides. The side walls of the trapezoidal section can be less pointed than the side walls of the wedge-shaped section. For reliable closing of the closure strips, the pressure pieces in a direction perpendicular to the plane of the connecting portion have a length that is at least 1.5 times, preferably at least twice as long as the length of the projection. As a result, even wide closure strips can be reliably closed.

Two webs are respectively provided on the side walls of the slide, in particular at opposite ends in the sliding direction, which project inwards and are guided along strips of the closure strips. As a result, the slider is secured against lifting from the closure strips, and also an exact guidance is ensured in a direction perpendicular to the sliding direction. The handling of the closure device is further simplified when at least one mark for indicating the opening or closing direction is attached to the slider. A corresponding marking can be provided as an arrow, pictogram or test. The closure device is preferably provided on a bag for storing food, in particular of a transparent plastic film.

The invention will be explained in more detail below with reference to an embodiment with reference to the accompanying drawings. Show it:

Figure 1 is a perspective view of a bag with a closure device according to the invention;

Figure 2 is a sectional view through the closure device of Figure 1;

Figure 3 is a bottom view of the slider of the closure device of Figure 1;

Figure 4 is a plan view of the slider of the closure device, and Figures 5A to 5C show several views of a slider with a modified projection. A bag 1 comprises two side walls 2, which are connected to one another at a bottom 9. The side walls 2 are further connected by two seams 8 on two opposite sides and have an opening 3 on one side. On each side wall 2 of the bag 1, a closure strip 4 or 5 is fixed, in particular glued or welded. The closure strips 4 and 5 are formed as extruded plastic profiles, which are fixed to the edge side of the side walls 2. Along the two closure strips 4 and 5, a slider 6 is movable between two end positions in order to open or close the closure strips 4 and 5. At opposite ends, the closure strips 4 and 5 are glued or welded together.

FIG. 2 shows the closure device in the region of the slide 6. The slider 6 comprises two side walls 1 5 and 1 7, which are connected to one another via a connecting portion 1 9 and the two closure strips 4 and 5 engage around in a U-shape. At the end of the side wall 1 5 is an inwardly projecting web 1 6 and at the end of the side wall 1 7 an inwardly projecting web 1 8 is provided, the slide 6 together lead to strips 1 3 and 14, which on the closure strip 4 and 5 are formed. As a result, the slider 6 is not detachable from the closure strips 4 and 5 in an upward direction in FIG. 2 and thus guided exactly perpendicular to the sliding direction.

The closure strip 4 comprises two hook-shaped profile strips 1 1, which are engageable with two hook-shaped profile strips 1 0 on the closure strip 5. For this purpose, the hook-shaped profile strips 1 0 and 1 1 pressed to each other and can lock together by the hook shape. On the closure strip 4, an inwardly projecting guide strip 1 2 is still formed, which prevents the upper hook-shaped profile strip 1 0 can escape on the closure strip 5 upwards. As a result, both profile strips 1 0 positively locked to the two profile strips 1 1. Of course, other geometries for the profile strips 1 0 and 1 1 can be used to detachably connect them together. In order to unlock the profile strips 1 0 and 1 1 and to open the bag 1, a projection 20 is integrally formed on the connecting portion 1 9, which engages at least partially between the two closure strips 4 and 5, in particular above the profile strip 1 0 and 1. By the projection 20, the closure strips 4 and 5 can be pressed apart to this when moving of the slide 6 to open in the opening direction. The projection 20 is a kind of separating nose, which separates the closure strips 4 and 5 when moving. In Figure 3, the slider 6 is in a view of the projection 20 on the

Connecting section 1 9 shown. It can be seen that the projection 20 is disposed entirely within the connecting portion 19 and has a wedge-shaped portion with a tip 21 and two spreading side walls 22. The angle of the side walls 22 may, for example, in a range between 5 ° and 25 °. At the opposite side to the tip 21 side 23 of the projection 20 is concave. It is also possible to design the projection 20 without curvature at the end or to provide at the end of another portion which adjoins the wedge-shaped portion. The width of the opposite side to the tip 21 23 is in a range between 1, 8 mm and 2.5 mm, so that when you open the closure strips 4 and 5 are kept visible at a distance.

On the side of the tip 21 are located on the slide 6, two pressure pieces 24, which protrude inwards and the closure strips 4 and 5 zusammenammendrü- to close them. For a good seal the pressure pieces 24 are arranged only at a small distance from the tip 21 of the projection 20, for example, between 1.5 mm to 3 mm, so that the closure strips 4 and 5 substantially form-fitting exactly by the plungers 24 and the projection 20 are guided and only small gaps arise.

In addition, it can be seen in Figure 3, that the inwardly projecting webs 1 6 and 1 8 are arranged in each case at opposite ends of the slider 6 in the sliding direction. The gap between the inwardly projecting webs 1 6 and 1 8 can be in the range between 0.7 and 1, 4 mm.

Trained as a one-piece plastic part slider 6 can also according to Figure 4 on an upper side of the connecting portion 1 9 have a mark 30 for identifying the opening or closing direction. The marker 30 can be provided by shaping or by color deposition. Instead of an arrow, other markings or words can be provided.

FIGS. 5A to 5C show a further embodiment of a modified slider 6 'which can be used in a bag 1. The Slider 6 'has at the connecting portion 19 a projection 20' with a wedge-shaped portion with side walls 22, which are formed as in the first embodiment. On the side opposite to the tip of the wedge-shaped section, a trapezoidal section is provided with side walls converging towards the end, in which, however, no point but a cut end is provided, which terminates flush with the connecting section 19.

Formed next to the projection 20 'are two pressure pieces 24' which are formed in a direction perpendicular to the plane of the connecting portion 19 somewhat more than twice as long as the projection 20 '. The plungers 24 'have rounded edges to prevent damage to the closure strips 4 and 5. The distance between a tip 21 of the wedge-shaped portion of the projection 20 'to the pressure pieces 24' in the sliding direction is between 1 mm to 2 mm, so that a substantial seal in this area is achieved.

The closure device according to the invention is used in particular for bags 1 for storing food. For this purpose, the bag can be made of transparent plastic films, wherein the closure strips 4 and 5 can also be deposited transparent or colored.

LIST OF REFERENCE NUMBERS

1 bag

2 side wall

3 opening

4 closure strips

5 closure strips

6, 6 'slide

8 seam

9 floor

10 profile strips

1 1 profile strip

12 guide strips

13 bar

14 bar

15 side wall

16 footbridge

17 sidewall

18 footbridge

19 connecting section

20, 20 'ahead

21 tip

22 side wall

23 page

24, 24 'pressure piece

30 mark

Claims

claims

Closure device for a bag (1) with two closure strips (4, 5) which have mutually latchable profile strips (10, 11) which can be opened and closed via a slide (6), wherein the slide (6) extends longitudinally Closure strip (4, 5) is movable, the closure strip (4, 5) surrounds a U-shaped and two side walls (15, 17) and a side walls (15, 17) connecting the connecting portion (19), wherein at the connecting portion (19 ) an at least partially between the closure strip (4, 5) engaging projection (20, 20 ') for opening the closure strips (4, 5) and spaced from the projection (20) has two externally applied to the closure strip (4, 5) pressure pieces ( 24, 24 ') are provided for closing the profile strips (10, 1 1), characterized in that the projection (20, 20') in plan view of the connecting portion (19) seen a wedge-shaped portion with two aufspreizenden Seitenw ligand (22), wherein the projection (20, 20 ') has a maximum width of more than 1, has 5 mm.

Closure device according to claim 1, characterized in that the projection (20, 20 ') with the wedge-shaped section has a maximum width between 1.8 to 2.5 mm.

Closure device according to claim 1 or 2, characterized in that the projection (20) has a length in the sliding direction of more than 3 mm, in particular more than 4 mm.

Closing device according to one of the preceding claims, characterized in that the distance of a tip (21) of the wedge-shaped portion of the projection (20, 20 ') to the pressure piece (24, 24') in the sliding direction less than 4 mm, in particular between 1 mm to 3 mm, is.

Closure device according to one of the preceding claims, characterized in that the projection (20 ') on the side (23) opposite the tip (21) has a trapezoidal section in plan view with side walls converging toward the end.

Closure device according to one of the preceding claims, characterized in that on the side walls (15, 17) respectively two inwardly projecting webs (1 6, 18) are formed, which are guided along strips (13, 14) of the closure strip (4, 5).

7. Closure device according to one of the preceding claims,

characterized in that the projection (20) is seen in plan view of the connecting portion (19) completely surrounded by the connecting portion (19).

8. Closure device according to one of the preceding claims,

characterized in that in a direction perpendicular to the plane of the connecting portion (19) the pressure pieces (24) at least 1, 5 times, preferably at least twice as long as the projection (20).

9. Closure device according to one of the preceding claims,

characterized in that the slider (6) has a mark (30) for indicating the opening or closing direction.

10. Closure device according to one of the preceding claims,

characterized in that the slide (6) is formed as a one-piece plastic component.

1 1 bag (1) for storing food with a closure device according to one of the preceding claims.