EP1431203A1 - 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 snap fastener, in particular a snap fastener tape, preferably made of plastic. It also relates to a reclosable bag, in particular a resealable packaging bag, or a resealable one Packaging or any other resealable container, preferably made of plastic, with a snap fastener or a snap fastener tape.

There are already one for the reclosability of bags and packaging A variety of snap fasteners and snap fastener tapes are known. Acting it is mostly snap fastener tapes that are endlessly extruded and consist of two strands. The two strands are mostly with two or more Equipped hooks that interlock. Another type of snap fastener tapes a strand has a hooked groove while the other strand engages with an arrowhead-like hook in the groove. A such a known embodiment is shown in FIG. 1 shown. Also the one-piece production of the pressure closures or the pressure closure tapes with the bags or packaging are known.

These closures are attached to the so-called Grip flap opened by pulling open and by pressing or streaking closed with thumb and forefinger.

The known closures have the disadvantage, however, that the groove and hook tip or hooks and double hooks for interlocking exactly one above the other must come to lie and then be pressed together with some resistance must, which is usually very difficult for the user and often does not succeed. It The bags or packaging then remain open and the contents spoil or dusty or is exposed to other negative environmental influences.

Especially with food packaging, where these closures are increasing are used, this disadvantage is particularly annoying, but should Partial withdrawals of the rest are locked and protected. The Closing these closures is made even more difficult by the fact that Grooves and hooks are very small and often fail to engage them precisely bring. To close it correctly, you need some skill and good Eyes.

Usually only small portions are consumed in individual households and therefore Partial withdrawals desired. There is a particular preference for a reclosure option. On the other hand, these single households are very common inhabited older people who have not only lost skill but also see less well and then often with complicated locking not being able to handle it.

To the currently used demand of advertising and the packaging industry after a "convenience" (convenience, convenience) for the To meet consumers, are in the field of reclosable Bags and packaging a variety of sealing bags with a slider, especially plastic, on the top of the bag or packaging offered. This packaging can be easily moved back and forth of the slide easy for the consumer to open and close. They have but the disadvantage that their production is very expensive and technically very complex is.

The object of the invention is for a pressure lock or pressure seal tape or with a resealable bag or a resealable bag Packaging to create an easy reclosure option.

According to the invention, this object is achieved by the features of claim 1. The pressure lock or the pressure lock tape are preferably made of plastic manufactured. They comprise at least one groove part and a groove part at least one engagement part having an engagement element. The groove part points funnel-shaped webs. Due to the funnel-shaped expansion of the groove part be ensured that the engagement element when closing the pressure lock can safely get into the groove, especially when the engagement element and the groove are initially not positioned correctly with respect to one another are. The fact that the groove part has funnel-shaped webs, the The engagement element can be inserted easily, almost "blindly" into the groove.

The groove part and / or the engagement part are preferably made of plastic, especially made of polyethylene or polypropylene. Preferably the whole Snap fastener or the entire snap fastener tape made of plastic, in particular one of the plastics mentioned. When facing the inside of the bag Fastening flags are available, these can be wholly or partially be coextruded.

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

Advantageous further developments are described in the subclaims.

It is advantageous if the groove part has inwardly pointing projections. This Protrusions can form part of the groove. You can at the top Be provided end of the groove or form the upper end of the groove.

As mentioned, it can be advantageous if the groove is large enough to engage the engagement element easy to slip into the groove. For this purpose, it is advantageous if the opposite ends of the projections a certain distance from each other. This distance is preferably such that a easy slipping of the engagement element into the groove is made possible.

In particular, the distance between the opposite ends of the projections greater than the width of the web adjoining the engagement element. Complete tightness may then no longer be guaranteed. Nevertheless, sufficient functionality can be guaranteed. The Partial withdrawals, for example of food, from reclosable bags experience or packaging is done only a few times, so that it in generally not critical to complete tightness or even liquid tightness arrives. Often, an easy and more important secure lockability. In many applications, it may be sufficient that the Contents with two to three partial withdrawals shortly before moisture and odor impairments is preserved. Of course, a higher level of tightness can also be chosen be accordingly by groove and engaging element in a conventional manner be formed.

The projections can be elongated, hook-shaped and / or tapered his.

The engagement element can be arrow-shaped.

The engagement element can be symmetrical. However, it is also possible that Form engagement element asymmetrically. It is preferably the inside of the container facing flank of the preferably arrow-shaped engagement element longer than the flank facing the container opening. In corresponding In this way, the groove or its inward-facing projections can be asymmetrical be trained. Preferably the inward projection is is longer on the side of the groove facing the interior of the container than the opposite projection. Due to the asymmetrical design of the Engagement element and / or the groove can in particular unintentional opening of the container can be prevented better from the inside.

The engagement element can be rounded at its outer end. If that's the Groove facing, outer end of the engagement element is rounded, the penetration the engagement element in the groove facilitated.

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

The engagement part and / or the groove part can have stiffeners, these Stiffeners can be directed inwards and / or outwards. Advantageous it is when the stiffeners on both sides of the groove part or the engaging part are present, preferably at the same distance from each other.

Another advantageous development is characterized in that the groove part in the area of the base of the groove has a thickness that slightly deflects the Bridges allowed. The thickness of the base of the groove is preferably such that that the webs are sufficiently easy to deflect on the one hand and on the other one have sufficient closing force.

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

The flags can be present on that side of the pressure lock, which faces the container opening. You can form grip tabs there. Instead or in addition, on the side of the pressure lock, flags facing the inside of the container. These flags can form fastening flags.

The groove part and / or the engagement part can be in one piece 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 area of the projections.

Another advantageous development is characterized in that one or several flags are co-extruded with the snap fastener.

The resealable bag according to the invention or the bag according to the invention reclosable packaging, preferably made of plastic, preferably made of polyethylene or polypropylene, is by an inventive Snap fastener or a snap fastener tape according to the invention. The reclosable bag or reclosable packaging and the snap fastener or the snap fastener tape can be in one piece.

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 the drawing shows

Fig. 1

a known pressure lock 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

4 in the closed state,

Fig. 6

a fourth embodiment in a cross section,

Fig. 7

4 and 5 during the closing process in a cross section,

Fig. 8

a fifth embodiment with two groove parts and engagement parts,

Fig. 9

a sixth embodiment with an asymmetrical engagement element and

Fig. 10

a seventh embodiment with a particularly small groove part and tamper evidence.

Figure 2 shows a resealable bag 1 made of plastic with a Snap fastener tape 2 made of plastic. With the first bag wall (back wall) 3 is a groove part 4 connected, which has a groove 5. With the second bag wall (Front wall) 6, an engagement part 7 is connected, which has an engagement element 8. The engagement element 8 is arrow-shaped. The tip of the arrow is the Groove 5 facing. It is rounded. Lateral surfaces 9, 10 adjoin them at an angle of approximately 45 °, the angle also being greater or smaller can, 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 upwards from the base 13 of the groove 5. Your starting points from the base 13 are spaced apart. The angle between the webs 11, 12 is about 60 °. It is preferably in the range between 30 ° and 90 °. The Crosspieces 11, 12 form a funnel-shaped extension towards the engagement element 8.

The groove part 4 further comprises inwardly facing projections 14, 15. The projections 14, 15 each point inward from the webs 11, 12. Your starting point lies slightly above the middle of the webs 11, 12. They close with the webs an angle of about 45 °, which angle can also be larger or smaller can and is preferably in the range between 30 ° and 60 °. As can be seen from Fig. 2 the projections 14, 15 run 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 with flags 16, 17, 30, 31, and connected in one piece. The flags 16, 31 are with the base 13 of the groove part 4 connected, namely connected in one piece. The flags 17, 30 are with the engagement part 7 connected in one piece. The flags 16, 17 face the container opening and form grip tabs. The flags 30, 31 face the interior of the container and form fastening flags.

In the embodiment shown in FIG. 3, the projections 14, 15 are elongated educated. They taper slightly, with the side surfaces each flat and the tips are rounded. The distance between the facing ends the projections 14, 15 is larger than the width of the engagement element 8 adjoining web 18, but smaller than the width of the engagement element 8. As a result it is ensured that the engagement element 8 slip easily into the groove 5 can and is then reliably held there.

In the embodiment shown in FIG. 3, the engagement element 8 is on its outer, the groove 5 facing end rounded. It essentially has one hemispherical surface. A conical surface is provided on the back, whose inclination corresponds essentially to that of the projections 14, 15. Due to this inclination in the direction of the central axis 29 towards the base 13 of the groove 5 runs through the inward-facing projections 14, 15 a kind of barb formed for the engagement element 8.

The base 13 of the groove 5 has a thickening 19 which faces away from the groove 5 Side of the flags 16, 31 is provided. A corresponding thickening 20 is in the area of the engagement part 7 on the side facing away from the groove part 4 Flags 17, 30 are provided. Furthermore, the web 18 has an approximately half height beginning extension 21 to the flags 17, 30 on. The flags 17, 30 are with that end of the extension 21 that on the opposite of the engagement element 8 Side is connected in one piece.

The engaging part 2 also has stiffeners 22, 23, each of which is inward are directed towards the groove part 4 and are the same in each case from the central axis 29 are spaced. The stiffeners 22, 23 are just 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 enable a latching of the engaging element 8 in the groove 5 and prevent an independent Loosen this engagement element 8. By deliberate spacing between the mutually facing ends of the projections 14, 15 and the web 18 of the Engagement part 7 enables 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 hook-shaped. They are shorter than in the embodiment according to FIG. 3. The hook-shaped curvature takes place towards the base 13 of the groove 5, so that the groove 5 has a cross section approximating a circular shape. In the embodiment 4, 5 and 7, the engaging member 7 has stiffeners 24, 25 facing outwards are directed, ie in the direction away from the groove part 4. Your distance from the Center axis 29 is somewhat larger than the distance between the outer ends of the webs 11, 12, but slightly less than the spacing of the stiffeners 22, 23 in Fig. 3. Furthermore are in the embodiment of FIGS. 4, 5 and 7 stiffeners 26, 27 on the Outside of the groove part 4, which are spaced from one another, which is slightly less than the distance between the outer ends of the webs 11, 12, but greater than the width of the base 13. The stiffeners 24, 25 provide stability of the engaging part 7 increased. The stiffeners 26, 27 increase the stability of the groove part 4th

The base 13 of the groove 5 is thinner than in the embodiment according to FIGS. 4, 5 and 7 in the embodiment according to FIG. 3. The base 13 has in the embodiment 4, 5 and 7 have a thickness which is a slight deflection of the funnel-shaped Bridges 11, 12 allows. The funnel-shaped webs 11, 12 can thereby bend more easily outwards when inserting the engagement element 8. simultaneously sufficient clamping force is guaranteed.

5, the projections 14, 15 engage behind the engagement element 8 in the closed state of the snap fastener tape.

Fig. 7 shows how even when the closure sides are not exactly one above the other the fastener tape closes effortlessly. 7 shows that the engaging part 7 lies obliquely over the groove part 4. When inserting the engagement element 8 into the groove 5, the engaging element 8 first reaches the outer one Area of one of the funnel-shaped webs 11, 12, in Fig. 7 with the outer area of the funnel-shaped web 12, in plant. It then becomes funnel-shaped itself widening web 12 directed obliquely inwards, in the case of FIG. 7 in the direction of Arrow 28 inclined obliquely towards groove 5 until the closed one shown in FIG. 5 Position is taken. Due to the funnel-shaped design of the webs 11, 12, the engagement element 8 is positively forced into the groove 5.

In the embodiment according to FIG. 6, the projections 14, 15 are tapered educated. They are more pointed and shorter than in the other embodiments. The engagement element 8 is almost spherical. The web 18 is in the area the projections 14, 15 slimmer. It widens towards flags 17, 30 continuous and progressive. Furthermore, in the embodiment according to FIG. 6 Flags 16, 31 connected to the groove part in the region of the projections 14, 15. The The base 13 of the groove part 4 lies outside the plane of the flags 16, 31.

Fig. 8 shows an embodiment with a double profile. There are two here Engagement parts 2, 2 'and two groove parts 4, 4' side by side.

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

In the embodiment according to FIG. 9, the flags 16, 31 with the groove part 4 connected in one piece, at a point approximately midway between the Base 13 of the groove part 4 and the projections 14, 15 is located. The flanks 16, 17, the are facing the container opening, form tabs. To open the container they can be gripped and pulled apart in the direction of arrows 34, 35.

10 shows a further embodiment with a particularly small groove part 4. In this embodiment, the flags 16, 17, which form the grip tabs, connected to each other by a U-shaped end piece 36. In the area of the end piece 36 perforations 37 are provided on both flags 16, 17, namely in the vicinity of the U-shaped end piece 36. Between the pressure lock 2 and the Perforations 37, the flags 16, 17 are connected to each other by an adhesive 39. The adhesive 39 is preferably a resin-like peelable Material. The adhesive 39 forms an originality assurance. To open of the container, the U-shaped end piece 36 is first arranged along the lines Perforations 37 separated. The flags 16, 17, which form grip tabs, are gripped and pulled apart so that the connection through the Adhesive 39 is released.

The invention makes a resealable bag or a resealable bag Packaging with a simple and secure reclosure option created. The packaging can be inexpensive and technically relative just be made. The invention follows the basic idea that when closing of the pressure lock or the pressure lock packaging of the engagement part on the groove part is possible, in the embodiments shown, of which further modifications are possible.

To ensure that the packaging is sealed before opening for the first time, a closure of the packaging over the pressure closure or the pressure closure band be provided, which is preferably easily removable, for example through a perforation. Outside the snap fastener tape, another Tamper evident, such as by an adhesive, preferably by a peelable resinous material.

Claims (21)

Snap fastener, in particular snap fastener tape, preferably made of plastic, with at least one groove part (4) having a groove (5) and at least one engagement part (7) having an engagement element (8),
characterized in that the groove part (4) has funnel-shaped webs (11, 12). Pressure lock according to claim 1, characterized in that the groove part (4) has inwardly pointing projections (14, 15). Pressure closure according to claim 2, characterized in that the projections (14, 15) are elongated. Pressure lock according to claim 2 or 3, characterized in that the projections (14, 15) are hook-shaped. Pressure lock according to one of claims 2 to 4, characterized in that the projections (14, 15) are tapered. Pressure lock according to one of the preceding claims, characterized in that the engagement element (8) is arrow-shaped. Pressure closure according to one of the preceding claims, characterized in that the engagement element (8) is asymmetrical. Pressure lock according to one of the preceding claims, characterized in that the engagement element (8) is rounded at its outer end. Pressure lock according to one of the preceding claims, characterized in that the engagement element (8) is spherical or approximately spherical. Pressure lock according to one of the preceding claims, characterized in that the engagement part (7) has stiffeners (22, 23; 24, 25). Pressure lock according to one of the preceding claims, characterized in that the groove part (4) has stiffeners (26, 27). Pressure lock according to one of the preceding claims, characterized in that the groove part (4) in the region of the base (13) of the groove (5) has a thickness which allows the funnel-shaped webs (11, 12) to be easily deflected. Pressure lock according to one of the preceding claims, characterized in that the groove part (4) and / or the engagement part (7) are connected to a flag (16, 17, 30, 31). Snap fastener according to claim 13, characterized in that the flags (16, 17) form grip tabs. Snap fastener according to claim 13 or 14, characterized in that the flags (30, 31) form fastening flags. Pressure lock according to one of claims 13 to 15, characterized in that the tabs (16, 31) are connected to the base (13) of the groove part (4). Pressure lock according to one of claims 13 to 15, characterized in that the flags (16, 31) are connected to the groove part (4) in the region of the projections (14, 15). Pressure lock according to one of claims 13 to 17, characterized in that one or more flags (16, 17, 30, 31) are coextruded with the pressure lock. Resealable bag or resealable packaging, preferably made of plastic, characterized by a pressure seal or a pressure seal tape according to one of claims 1 to 18. Resealable bag or resealable packaging according to claim 19, characterized in that the resealable bag or resealable packaging and the pressure seal or the pressure seal tape are in one piece. Resealable bag or resealable packaging according to claim 19 or 20, characterized by a tamper-evident device.

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