EP1431203B1 - Slide fastener, slide fastener band and reclosable bag - Google Patents

Abstract

The press closure comprises a strip (16, 31) with a central, funnel-shaped profile (11, 12) with hooked ends (14, 15) enclosing a groove (5). A second strip (17, 30) carries a locking strip (8) with an arrow-shaped or circular cross-section. An Independent claim is included for a resealable bag fitted with the closure.

Description

The invention relates to a pressure closure, in particular a pressure sealing strip, preferably made of plastic. It further relates to a resealable bag, in particular a resealable packaging bag, or a resealable package or other resealable container, preferably made of plastic, with a pressure closure or a pressure seal tape.

• Fig. 1 gezeigt. Auch die einstückige Herstellung der Druckverschlüsse bzw. der Druckverschlußbänder mit den Beuteln oder Verpackungen sind bekannt.

For the reclosability of bags and packaging a variety of pressure caps and pressure sealing tapes are already known. These are usually pressure-sealing tapes, which are extruded endlessly and consist of two strands. The two strands are usually equipped with two or more hooks, which mesh with each other. In another type of pressure-sealing tapes, one strand has a hooked groove, while the other strand engages with a dart-like hook in the groove. Such a known embodiment is in

• Fig. 1 shown. The one-piece production of the pressure seals or the pressure closure tapes with the bags or packaging are known.

Attached in the bag openings, these closures are opened by pulling on the so-called handle flaps and closed by pressing or lengthening with thumb and forefinger.

The prior art closures, however, have the disadvantage that groove and hook tip or hook and double hook must come to lie exactly above each other for meshing and then have to be pressed together with some resistance, which is usually very difficult for the user and often fails. The bags or packages then remain open and the contents spoil or become dusty or are exposed to other negative environmental influences.

Especially in food packaging, where these closures are increasingly used, this disadvantage is particularly disturbing, but should be closed after partial withdrawals of the remaining remainder and protected. The closing of these closures is particularly complicated by the fact that the grooves and hooks are very small and it often fails to bring them precisely engaged. To close properly, it requires some skill and good eyesight.

In single households usually only small portions are consumed and therefore partial withdrawals desired. There one particularly prefers a reclosure option. On the other hand, these single households are very often inhabited by older people who have not only lost in skill, but also see worse and then often can not cope with the complicated closing.

In order to meet the much-needed demands of the advertising and packaging industries for convenience to consumers, in the field of resealable bags and packages, a variety of closure bags are provided with a slider, particularly of plastic, offered on the top of the bag or the packaging. Although these packages are easy to open and close by simply pushing the slider back and forth for the consumer. But they have the disadvantage that their production is very expensive and technically very expensive.

The JP 2000 272633 A discloses a pressure closure according to the preamble of the claim

From the WO 01 60707 A a pressure closure is known, which consists of a plurality of groove parts and a plurality of engagement parts, wherein the groove parts have funnel-shaped webs, the funnel-shaped extensions to the engagement elements form, and having inwardly facing projections.

The object of the invention is to provide a simple reclosure option in a pressure seal or pressure seal tape or a resealable bag or a resealable packaging.

According to the invention, this object is solved by the features of claim 1. The pressure seal or the pressure seal tape are preferably made of plastic. They comprise at least one groove part having a groove part and at least one engagement element exhibiting engagement part. The groove part has funnel-shaped webs, which form a funnel-shaped extension to the engagement element. The groove part further has inwardly facing projections which form a barb for the engagement element. The starting point of the projections is slightly above the middle of the webs. By the funnel-shaped extension of the groove part can be ensured that when closing the pressure lock, the engagement element can safely enter the groove, in particular even if the engagement element and the groove are not yet positioned correctly to each other. Characterized in that the groove part has funnel-shaped webs, the engagement element can be easily, yes almost "blind", introduced into the groove.

The groove part and / or the engagement part are preferably made of plastic, in particular of polyethylene or polypropylene. Preferably, the entire pressure seal or the entire pressure sealing strip made of plastic, in particular one of the said plastics. When facing the bag interior. Mounting lugs are present, they may be fully or partially coextruded.

The groove is preferably sized so large that the engagement element can easily slip into the groove.

The inwardly facing projections may form part of the groove.

Advantageous developments are described in the subclaims.

As mentioned, it may be advantageous if the groove is large enough to allow the engagement element to easily slip into the groove. For this purpose, it is advantageous if the opposite ends of the projections have a certain distance from each other. This distance is preferably dimensioned such that an easy insertion of the engagement element is made possible in the groove.

In particular, the distance of the opposite ends of the projections is greater than the width of the adjoining the engagement element web. As a result, then a complete tightness may not be guaranteed. Nevertheless, sufficient functionality can be ensured. The partial withdrawals, for example of food, from resealable bags or packaging are made according to experience only a few times, so that it does not depend in general on a complete tightness or even liquid tightness. Of greater importance is often an easy and secure closeability. In many applications, it may be sufficient that the contents of two to three partial withdrawals is temporarily protected against moisture and odor impairments. Of course, a greater tightness can be selected by groove and engaging element are formed according to known manner.

The projections may be elongate, hook-shaped and / or tapered.

The engagement element may be arrow-shaped.

The engagement element may be symmetrical. However, it is also possible to form the engagement element asymmetrically. In this case, preferably, the side of the container facing the edge of the preferably arrow-shaped engagement element is formed longer than the edge of the container opening facing edge. In a corresponding manner, the groove or its inwardly directed projections may be formed asymmetrically. Preferably, the inwardly facing projection, which lies on the side of the groove facing the container interior, is made longer as the opposite projection. As a result of the asymmetrical design of the engagement element and / or the groove, unintentional opening of the container from inside in particular can be better prevented.

The engagement element may be rounded at its outer end. When the groove-facing outer end of the engagement member is rounded, the penetration of the engagement member into the groove is facilitated.

According to a further advantageous embodiment, the engagement element is designed spherical or approximately spherical.

The engagement part and / or the groove part may have stiffeners, which stiffeners may be directed inwards and / or outwards. It is advantageous if the stiffeners are present on both sides of the groove part or of the engagement part, preferably at the same distance from it.

A further advantageous development is characterized in that the groove part in the region of the base of the groove has a thickness which allows a slight deflection of the webs. The thickness of the base of the groove is preferably dimensioned such that the webs for a sufficiently easily deflected and on the other hand have a sufficient closing force.

The groove part and / or the engagement part can be connected to one or more flags.

The flags may be present on the side of the pressure cap which faces the container opening. You can make handles there. Instead or in addition, flags may also be present on the side of the pressure closure which faces the container interior. These flags can form fastening flags.

The groove part and / or the engagement part may be integral with the flags. The flags can be connected to the base of the groove part. However, it is also possible that the flags are connected to the groove part at another location, preferably in the region of the projections.

A further advantageous development is characterized in that one or more flags are coextruded with the pressure closure.

The resealable bag according to the invention or the resealable packaging according to the invention, which are preferably made of plastic, preferably of polyethylene or polypropylene, is characterized by a pressure seal according to the invention or a pressure-sealing tape according to the invention. The resealable bag and resealable package and the pressure closure may be integral.

Fig. 1

einen vorbekannten Druckverschluß in einem Querschnitt,

Fig. 2

eine erste Ausführungsform der Erfindung in einer perspektivischen Ansicht,

Fig. 3

eine zweite Ausführungsform in einem Querschnitt,

Fig. 4

eine dritte Ausführungsform im offenen Zustand in einem Querschnitt,

Fig. 5

die Ausführungsform gemäß Fig. 4 im geschlossenen Zustand,

Fig. 6

eine vierte Ausführungsform in einem Querschnitt,

Fig. 7

die Ausführungsform gemäß Fig. 4 und 5 während des Schließvorganges in einem Querschnitt,

Fig. 8

eine fünfte Ausführungsform mit zwei Nutteilen und Eingriffteilen,

Fig. 9

eine sechste Ausführungsform mit einem asymmetrischen Eingriffelement und

Fig. 10

eine siebte Ausführungsform mit einem besonders kleinen Nutteil und Originalitätssicherungen.

Embodiments of the invention are explained below with reference to the accompanying drawings in detail. In the drawing shows

Fig. 1

a prior art pressure seal in a cross section,

Fig. 2

A first embodiment of the invention in a perspective view,

Fig. 3

a second embodiment in a cross section,

Fig. 4

a third embodiment in the open state in a cross section,

Fig. 5

the embodiment according to FIG. 4 in the closed state,

Fig. 6

a fourth embodiment in a cross section,

Fig. 7

the embodiment according to FIGS. 4 and 5 during the closing process in a cross section,

Fig. 8

a fifth embodiment with two groove parts and engaging parts,

Fig. 9

a sixth embodiment with an asymmetric engagement element and

Fig. 10

a seventh embodiment with a particularly small groove part and tamper-evident.

FIG. 2 shows a resealable bag 1 made of plastic with a pressure closure strip 2 made of plastic. With the first bag wall (rear wall) 3, a groove part 4 is connected, which has a groove 5. Connected to the second bag wall (front wall) 6 is an engagement part 7, which has an engagement element 8. The engagement element 8 is formed arrow-shaped. The tip of the arrow faces the groove 5. It is rounded. They are adjoined by lateral surfaces 9, 10 at an angle of about 45 °, wherein the angle can also be larger or smaller, similar to the previously known embodiment, which is shown in Fig. 1.

The groove part 4 has funnel-shaped webs 11, 12. The funnel-shaped webs 11, 12 point obliquely upward from the base 13 of the groove 5. Their starting points from the base 13 are at a distance from each other. The angle between the webs 11, 12 is about 60 °. It is preferably in the range between 30 ° and 90 °. The webs 11, 12 form a funnel-shaped extension to the engagement element 8.

The groove part 4 further comprises inwardly facing projections 14, 15. The projections 14, 15 point from the webs 11, 12 in each case. Their starting point is slightly above the middle of the webs 11, 12. They include with the webs an angle of about 45 °, wherein this angle can also be larger or smaller, and preferably in the range between 30 ° and 60 °. As shown in Fig. 2 can be seen the projections 14, 15 extend slightly towards the base 13 of the groove 5. They form a barb for the engagement element. 8

The groove part 4 and the engagement part 7 are connected to lugs 16, 17, 30, 31, in one piece. The lugs 16, 31 are connected to the base 13 of the groove part 4, namely integrally connected. The flags 17, 30 are integrally connected to the engagement part 7. The flags 16, 17 are facing the container opening and form handle flaps. The flags 30, 31 are facing the container interior and form mounting lugs.

In the embodiment shown in Fig. 3, the projections 14, 15 are elongated. They run slightly pointed, with the side surfaces are each flat and the tips are rounded. The distance between the mutually facing ends of the projections 14, 15 is greater than the width of the adjoining the engagement element 8 web 18, but smaller than the width of the engagement element 8. This ensures that the engagement element 8 can easily slip into the groove 5 and Then it is reliably recorded.

The engagement element 8 is rounded in the embodiment shown in Fig. 3 at its outer, the groove 5 facing the end. It has a substantially hemispherical surface. On the back of a conical surface is provided, whose inclination corresponds substantially to that of the projections 14, 15. As a result of this inclination, which runs in the direction of the center axis 29 toward the base 13 of the groove 5, a type of barb for the engagement element 8 is formed by the inwardly directed projections 14, 15.

The base 13 of the groove 5 has a thickening 19, which is provided on the side facing away from the groove 5 of the lugs 16, 31. A corresponding thickening 20 is provided in the region of the engagement part 7 on the side of the lugs 17, 30 remote from the low-part part 4. Furthermore, the web 18 has an extension 21 beginning at approximately half the height to the lugs 17, 30. The flags 17, 30 are with that end of the extension 21, which lies on the opposite side of the engaging element 8, integrally connected.

The engagement member 2 further includes stiffeners 22, 23, which are each directed inward, ie towards the groove part 4, and which are each equally spaced from the center axis 29. The stiffeners 22, 23 are slightly outside the ends of the projections 14, 15. They increase the stability of the engagement part. 7

The projections 14, 15 carried by the funnel-shaped webs 11, 12 make it possible for the engagement element 8 to engage in the groove 5 and prevent an independent release of this engagement element 8. By the deliberate spacing between the mutually facing ends of the projections 14, 15 and the web 18 the engaging part 7 allows easy closing. The projections 14, 15 form the upper end of the groove 5.

In the embodiment shown in FIGS. 4, 5 and 7, the projections 14, 15 are hook-shaped. They are shorter than in the embodiment according to FIG. 3. The hook-shaped curvature takes place toward the base 13 of the groove 5, so that the groove 5 has a cross section approximating a circular shape. In the embodiment of Fig. 4, 5 and 7, the engaging member 7 stiffeners 24, 25 which are directed outwards, ie in the direction of the groove part 4 away. Their distance from the center axis 29 is slightly greater than the distance between the outer ends of the webs 11, 12, but slightly less than the distance of the stiffeners 22, 23 in Fig. 3. Further, in the embodiment of FIGS. 4, 5 and 7 Stiffeners 26, 27 on the outside of the groove part 4 present, which have a distance from each other which is slightly smaller than the distance between the outer ends of the webs 11, 12, but larger than the width of the base 13. By the stiffeners 24, 25 is increases the stability of the engaging part 7. The stiffeners 26, 27 increase the stability of the groove part. 4

The base 13 of the groove 5 is thinner in the embodiment of Figs. 4, 5 and 7 than in the embodiment of Fig. 3. The base 13 has in the embodiment According to Fig. 4, 5 and 7, a thickness which allows a slight deflection of the funnel-shaped webs 11, 12. The funnel-shaped webs 11, 12 can thereby bend more easily during insertion of the engagement element 8 to the outside. At the same time a sufficient clamping force is ensured.

As can be seen from Fig. 5, the projections 14, 15 engage behind the engagement element 8 in the closed state of the pressure sealing strip.

Fig. 7 shows how can close easily even with not exactly superimposed closure pages the pressure closure tape. From Fig. 7 it can be seen that the engagement part 7 is obliquely above the groove part 4. When inserting the engagement element 8 into the groove 5, the engagement element 8 first comes into contact with the outer region of one of the funnel-shaped webs 11, 12, in FIG. 7 with the outer region of the funnel-shaped web 12. It is then passed through the funnel-shaped widening web 12 obliquely inwards, in the case of Fig. 7 in the direction of the obliquely inclined groove 5 toward the arrow 28 until the illustrated in Fig. 5, closed position is taken. Due to the funnel-shaped design of the webs 11, 12, the engagement element 8 is formally forced into the groove 5.

In the embodiment of Fig. 6, the projections 14, 15 are formed tapering. They are sharper and shorter than in the other embodiments. The engagement element 8 is designed almost spherical. The web 18 is slimmer in the region of the projections 14, 15. It expands towards the flags 17, 30 continuously and progressively. Furthermore, in the embodiment according to FIG. 6, the lugs 16, 31 are connected to the groove part in the region of the projections 14, 15. The base 13 of the groove part 4 is outside the plane of the flags 16, 31st

Fig. 8 shows a double profile embodiment. Here are two engagement parts 2, 2 'and two groove parts 4, 4' side by side.

Fig. 9 shows an embodiment in which the arrow-shaped engagement element 8 is formed asymmetrically. The edge 32 facing the container is longer formed as the opposite, the container opening facing flank 33. In a corresponding manner, the groove 5 is formed asymmetrically. The width of the groove 5 on the side of the flank 32 is greater than the width of the groove 5 on the side of the flank 33. Further, the projection 14, which lies on the side of the groove 5, which faces the container interior, longer than that opposite projection 15.

In the embodiment of Fig. 9, the lugs 16, 31 are integrally connected to the groove part 4, at a position which is approximately in the middle between the base 13 of the groove part 4 and the projections 14, 15. The flanks 16, 17, which face the container opening, form handle flaps. To open the container, they can be grasped and pulled apart in the direction of the arrows 34, 35.

10 shows a further embodiment with a particularly small groove part 4. In this embodiment, the lugs 16, 17, which form the handle flaps, are interconnected by a U-shaped end piece 36. In the region of the end piece 36 perforations 37 are provided on both lugs 16, 17, in the vicinity of the U-shaped end piece 36. Between the pressure seal 2 and the perforations 37, the flags 16, 17 are connected by an adhesive 39 with each other. Preferably, the adhesive 39 is a resinous peelable material. The adhesive 39 forms a tamper-evident. To open the container, the U-shaped end piece 36 is first separated along the line-shaped perforations 37. The tabs 16, 17, which form handle tabs, are gripped and pulled apart so that the bond is released by the adhesive 39.

The invention provides a resealable bag or a resealable package with a simple and secure reclosure capability. The packaging can be inexpensively and technically made relatively easy. The invention follows the basic idea that when closing the snap closure or the pressure seal packaging safe impact the engagement part is possible on the groove part, in the embodiments shown, of which further modifications are possible.

In order to make it possible to seal the package prior to the first opening, a closure of the packaging may be provided above the pressure seal or the pressure-sealing tape, which is preferably easily removable, for example by a perforation. Outside the pressure-sealing tape, a further tamper-evident feature can be applied, for example by an adhesive, preferably by a peelable resinous material.

Claims (20)

1. Compressive closure, in particular compressive closure tape, preferably made from plastic, having at least one groove part (4) which has a groove (5) and at least one engagement part (7) which has an engagement element (8), the groove part (4) having funnel-shaped webs (11, 12) which form a funnel-shaped widening section towards the engagement element (8) and inwardly pointing projections (14, 15) which form a barb for the engagement element, characterized in that the starting point of the projections (14, 15) lies somewhat above the centre of the webs (11, 12).
2. Compressive closure according to Claim 1, characterized in that the projections (14, 15) are of elongate configuration.
3. Compressive closure according to Claim 1 or 2, characterized in that the projections (14, 15) are of hook-shaped configuration.
4. Compressive closure according to one of the preceding claims, characterized in that the projections (14, 15) are configured so as to taper at an acute angle.
5. Compressive closure according to one of the preceding claims, characterized in that the engagement element (8) is arrow-shaped.
6. Compressive closure according to one of the preceding claims, characterized in that the engagement element (8) is of asymmetrical configuration.
7. Compressive closure according to one of the preceding claims, characterized in that the engagement element (8) is rounded at its outer end.
8. Compressive closure according to one of the preceding claims, characterized in that the engagement element (8) is spherical or approximately spherical.
9. Compressive closure according to one of the preceding claims, characterized in that the engagement part (7) has reinforcements (22, 23; 24, 25).
10. Compressive closure according to one of the preceding claims, characterized in that the groove part (4) has reinforcements (26, 27).
11. Compressive closure according to one of the preceding claims, characterized in that, in the region of the base (13) of the groove (5), the groove part (4) has a thickness which makes slight recessing of the funnel-shaped webs (11, 12) possible.
12. Compressive closure according to one of the preceding claims, characterized in that the groove part (4) and/or the engagement part (7) are/is connected to a tab (16, 17, 30, 31).
13. Compressive closure according to Claim 12, characterized in that the tabs (16, 17) form gripping lugs.
14. Compressive closure according to Claim 13 or 12, characterized in that the tabs (30, 31) form fastening tabs.
15. Compressive closure according to one of Claims 12 to 14, characterized in that the tabs (16, 31) are connected to the base (13) of the groove part (4).
16. Compressive closure according to one of Claims 12 to 14, characterized in that the tabs (16, 31) are connected to the groove part (4) in the region of the projections (14, 15).
17. Compressive closure according to one of Claims 12 to 16, characterized in that one or more tabs (16, 17, 30, 31) are coextruded with the compressive closure.
18. Reclosable bag or reclosable pack, preferably made from plastic, characterized by a compressive closure or a compressive closure tape according to one of Claims 1 to 17.
19. Reclosable bag or reclosable pack according to Claim 18, characterized in that the reclosable bag or the reclosable pack and the compressive closure or the compressive closure tape are in one piece.
20. Reclosable bag or reclosable pack according to Claim 18 or 19, characterized by an originality safeguarding means.

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