EP3235751B1 - Plastic bag for tearing individual bags - Google Patents

Description

The invention relates to a plastic bag tape from which individual bags, in particular garbage bags, can be demolished.

Out US 2009/0184123 A1 For example, a plastic bag web is known in which individual waste bags along a perforation can be torn off along a bottom between a bottom seam of a first bag and an opening edge of a second bag. The perforation is interrupted in the middle by a punched-out opening through which an opening of a trash can can be pressed through in the unfolded state of the bag. Further, a person may engage the opening to tear the second bag along the perforation from the first bag.

Out 2006/0188180 A1 a bag roll is known in which subsequent bags are connected to each other via a tearable perforation, wherein laterally offset tabs of a front side and a rear side of the next bag protrude into an intermediate region below a bottom seam of the front bag.

There is a continuing need to simplify the handling of a tearable bag tear-off bag.

It is the object of the invention to show measures that allow easy handling of a tea bag that can be torn off from a plastic bag band.

The object is achieved according to the invention by a plastic bag band having the features of claim 1. Preferred embodiments of the invention are specified in the subclaims and the following description, which individually or in combination may constitute an aspect of the invention.

According to the invention, a plastic bag band for tearing off individual bags is provided with a first bag, the first bag having a bottom seam for forming a bag bottom, a second bag, the second bag having a partially limited by a perforation Öffhungskante for opening the second bag, wherein the Opening edge of the second bag is connected to the bottom seam of the first bag via an adjacent at the bottom seam of the first bag and the perforation line of the second bag intermediate strips, the second bag to the bottom seam of the first bag from the perforation line of the second bag in the In the intermediate strip, the opening extension in the intermediate strip is delimited by a continuous separating slot and, in the region of the opening extension, superimposed layers of a front side and a rear side of the second bag are provided are seen.

The respective bag may have a bottom closed with the bottom seam, while the opening edge is not closed. The bag can thereby be opened in the torn-off state at the opening edge and optionally unfolded to use the volume limited by the bag, in particular to receive waste. If the bag has not yet been torn off and is still part of the plastic bag band, the bag's state of the bag, which is torn off from the plastic bag band, lies flat against one another. The respective layers can thereby easily adhere to one another, for example by adhesion effects and / or electrostatic charging. Therefore, it has proved difficult to open the torn bag. Due to the adhering layers of the bag, a person has difficulty grasping the other side with thumb and forefinger of one hand and the other side with thumb and forefinger of the other hand and raising the bag.

However, by the opening approach, a portion projecting from the opening edge is formed, which a person can easily and intuitively insert between the thumb and the index finger would. Subsequently, the person can rub by a relative movement of the thumb and index finger to the superimposed in the region of the opening approach layers of the bag, whereby the individual layers are moved relative to each other. In this state, a part of the one position of the opening approach over the part of the other position of the opening approach and vice versa. The person can then attack each of these projecting parts of the respective position of the bag with thumb and forefinger and pull the bag apart easily and intuitively. The risk that the person unintentionally engages both layers of the superimposed layers of the bag, thereby significantly reduced. The individual layers of the bag can be pulled apart in the region of the holding approach by rubbing with the thumb and forefinger, which easily the respective position can be used to pull the bag, so that an easy handling of a tea bag tear-off bag is made possible.

In the case of a bag with a straight tear-off edge, the two layers would lie above one another in a relative movement of the superimposed layers of the bag parallel to the tear-off edge and it would possibly result in a slight protrusion of one layer to the other layer at a random position. The projecting areas can be offset from each other so far that the responsible for the relative movement hand would have to be implemented, whereby the force acting on the layers of force is eliminated. The layers would then move back to their original position and rest flat again. A light gripping of the individual layers would not be possible in this situation. If in a bag with a straight tear-off edge a relative movement of the superposed layers of the bag is perpendicular to the tear-off edge of the two layers, only one of the layers can survive, so that at least the other layer can not be easily grasped and the bag can not be unfolded. Due to the protruding opening approach, however, the superimposed layers can be displaced with one hand to each other and held, so that with the other hand, a protruding part of the one layer can be gripped and the other position of the first hand can be grasped. This can be done very quickly and routinely in a narrow range, so that such a plastic bag band is particularly suitable for commercial use, for example, in room cleaners, as unnecessary delays can be avoided.

The opening approach is not limited by a perforation, but a continuous separating slot, wherein the side facing away from the bottom seam of the first bag side of the opening approach, which extends in particular in an extension of the perforation, uninterrupted, that is without perforation and without separating slot, integrally into the material of the second bag. If the second bag is to be torn off, the second bag can be separated along the perforation from the intermediate area of the first bag. When the crack along the perforation reaches the opening approach, the crack hits the separation slot so that the opening tab is automatically separated from the intermediate area. After the separation slot, the tear may continue to propagate along the remaining perforation until the second bag is completely torn off the first bag. The separating slot that can be produced, for example, by stamping reliably prevents the material of the opening attachment from being torn off by mistake from the second bag. Instead, the crack resulting from the tearing off of the second bag can take an odd course over the separating slot without having to fear damage to the opening approach or the bottom seam.

The opening approach may be provided in the intermediate area of the first bag provided anyway. The intermediate area is required so that if the second bag tears off the first bag along the perforation, the bottom seam of the first bag can not be damaged. Since the opening approach is limited by a continuous separation slot and not by an interrupted perforation, no major forces are expected in the region of the opening approach, so that no safety distance to the bottom seam needs to be maintained. In addition, the separating slot can be provided with a high precision relative to the bottom seam, so the separating slot much closer than the Perforation can approach the bottom seam. The material used for the plastic bag band with a certain number of bags is not or at least not significantly increased. Since the perforation can be made by a punch, it is easily possible to provide in the punch also the cutting tool for the separating slot delimiting the opening approach, so that also the tooling costs and the manufacturing costs remain substantially unchanged.

The bags may in particular be made of a plastic material, which is preferably configured substantially transparent or colored and / or colored. Preferably, the plastic bag tape is made of a plastic film made of polyethylene or polypropylene. In particular, the plastic material may be made of a non-regenerative or regenerative material ("regenerate") which is preferably biodegradable.

In particular, it is provided that the separating slot begins at the perforation line and ends at the perforation line, wherein the perforation line is interrupted in a width range spanned by the opening approach. The perforation line may extend from one side edge to the other side edge of the bag, wherein the perforation line in the region of the opening approach interrupted, that is not provided, is. The separation slot can begin in an imaginary extension of the perforation line on one side and end on the other side. As a result, the perforation line can pass over the separating gap without transition. The perforation line, together with the separating slot, can run continuously from one side edge to the other side edge. A simple separation of the second bag from the remaining plastic bag band is thereby easily possible.

Preferably, the surface and / or the shape of the opening extension substantially corresponds to the bearing surface of a full-grown adult thumb in the area of the phalanx distalis. The opening approach can thereby to the space requirement adapted to gripping and rubbing between thumb and forefinger intuitively sufficient.

Particularly preferably, the individual opening projection has an extension s parallel to the extension D of the bottom seam, where 0.05 ≦ s / D ≦ 0.30, in particular 0.10 ≦ s / D ≦ 0.25 and preferably 0.15 ≦ s / D ≤ 0.20 applies. For example, the extension s = 3 cm ± 0.5 cm. The extension s of the opening approach is thus large enough to grab him well and rub. At the same time, however, the extent s of the opening approach is also small enough so that the bags connected to one another via the perforation line can be easily rolled up and unrolled without the opening approach being folded over during rolling up.

In particular, the individual opening projection has an extension h perpendicular to the bottom seam and the intermediate strip has an extension H perpendicular to the bottom seam, where 0.50 ≦ h / H ≦ 0.95, in particular 0.60 ≦ h / H ≦ 0.90, preferably 0 , 70 ≦ h / H ≦ 0.85, and more preferably 0.75 ≦ h / H ≦ 0.80. For example, the extension h = 2.5 cm ± 0.4 cm. The extension h of the opening approach is thus large enough to grab him well and rub. At the same time, it is ensured that the bottom seam is not damaged during the production of the separating gap.

Preferably, the opening approach is provided substantially centrally between a first longitudinal edge connecting the respective bottom seam with the perforation line and the second longitudinal edge of the first bag and the second bag. In particular, only one opening approach is provided, in which an upper layer and a lower layer of the respective bag are provided. When the bag is torn off the plastic bag band, a highlighting through the opening tab results, which is intuitively attacked to unfold and open the bag. In particular, it is possible to fold on the longitudinal edges of a part of the bag, so that there is a partial area with four layers can give. The central opening approach ensures that there are only exactly two layers and that opening the bag is particularly easy.

Particularly preferably, a first opening approach and a second opening laterally spaced apart from the first opening approach are provided, wherein in particular the first opening approach and the second opening approach are spaced apart from each other in a central line of the first bag and the second bag by a substantially equal amount , In particular, with a comparatively large bag, for example, a 120 1 garbage bag, it may be easier to open when the opening approach is provided off-center, so that the bag can be held with the opening approach at the highest point and wiped. An area of the bag covering the opening approach, which hangs down due to gravity, can thereby be avoided.

In particular, the separating slot of the opening approach connects sharp-edged to the perforation line, wherein in particular between the separating slot and the perforation line at the connection point an angle α of 80 ° ≤ α ≤ 135 °, preferably 90 ° ≤ α ≤ 120 ° and particularly preferably 100 ° ≤ α ≤ 110 ° is included. Since the opening approach is limited by the separating slot, it is not necessary to provide a smooth transition of the pitch between the perforation line and the separating slot. Through the separating slot accidental tearing or damaging the opening approach can be avoided. Instead, the separating slot may have a sharp-edged, in particular substantially transitionless, protruding with a sudden change in the pitch, a change in direction of the propagating crack during tearing of the bag from the perforation line. The area of the opening approach can thereby be easily limited to the area required for reaming the superimposed layers of the bag.

Preferably, the perforation line runs over its entire extent substantially parallel to the bottom seam. A change in the distance of the tearing of the bag devoted spreading crack to the bottom seam is thereby only in the range of at least one opening approach. The course of the perforation line thereby extends along an intuitively resulting tear-off direction in order to separate the respective bag from the plastic bag band.

Particularly preferably, the bottom seam and / or the perforation line runs essentially as a straight line. The production of the plastic bag band is simplified.

In particular, the bags are rolled up into a roll. The storage space requirement for the plastic bag band can be minimized. In addition, a bag to be torn off can be easily unrolled from the plastic bag band and subsequently torn off, so that the handling of the plastic bag band is simplified and accelerated.

Preferably, the bags are made of a tubular continuous material, in particular by welding and stamping. The production of the plastic bag band is thereby simplified and accessible to mass production.

The invention will now be described by way of example with reference to the accompanying drawing with reference to a preferred embodiment, wherein the features shown below, both individually and in combination may represent an aspect of the invention. It shows:
Fig. 1 : A schematic plan view of a part of a plastic bag band.

This in Fig. 1 Plastic bag band 10 shown only partially in the rolled-up state has a first bag 12 and a second bag 14. The first bag 12 is closed at its bottom facing the second bag 14 by a bottom seam 16 made by welding. The second bag 14 is connected via a parallel to the bottom seam 16 extending perforation line 18 with the first bag 12, wherein the second bag 14 through Tearing the perforation line 18 can be separated from the first bag 12. After tearing, the first bag 12 corresponds to the second bag 14, which in turn can be torn off a first bag 12 along the perforation line 18 and so on until the last bag is reached. The first bag 12 and the second bag 14 are configured identically. In the illustrated embodiment, the bottom seam 16 and the perforation line 18 extend from a first side edge 20 to an opposite second side edge 22 over the entire width D of the bags 12, 14.

Between the bottom seam 16 and the perforation line 18, an intermediate strip 24 is formed with a height H in the longitudinal direction of the plastic bag band 10, so that the separation of the perforation line 18 can not damage the bottom seam 16. When the second bag 14 is separated from the first bag 12, along the perforation line 18 results in an opening edge 26, which forms an opening to the inner volume of the second bag 14 in the unfolded state of the second bag 14. In order to facilitate the opening of the second bag 14, an opening approach 28 is provided, preferably centrally, which interrupts the perforation line 18 along a width s. The opening approach 28 protrudes with a height h in the intermediate strip 24 without the bottom seam 16 to reach. The opening approach 28 is limited in the intermediate strip 24 by a continuous separating slot 30 which merges at both lateral sides of the opening projection 28 at its ends with an angle α in the perforation line. The tearing off of the second bag 14 from the first bag 12 is thereby easily possible without damaging the bottom seam 16 of the first bag 12. When the second bag 14 has been torn off the first bag 12, the layers of the second bag 14, ie front and back, lying one above the other in the area of the opening approach 28, can be gripped with thumb and forefinger and moved laterally relative to one another by a rubbing relative movement of the thumb and forefinger , As a result, the one layer on the one side and the other layer on the other side can survive and can be easily gripped individually by a pair of thumb and forefinger in order to raise the second bag 14. This results in a limited opening 26 for the opening of the second bag 14th

Claims (12)

1. Plastic bag strip for tearing off individual bags (12, 14),
   having a first bag (12), wherein the first bag (12) has a base seam (16) for configuring a bag base;
   a second bag (14), wherein the second bag (14) has an opening border (26) for opening the second bag (14), said opening border (26) being partially delimited by a perforation line (18);
   wherein the opening border (26) of the second bag (14) is connected to the base seam (16) of the first bag (12) by way of an intermediate strip (24) that adjoins the base seam (16) of the first bag (12) and the perforation line (18) of the second bag (14);
   wherein the second bag (14) has an opening appendage (28) which projects from the perforation line (18) of the second bag (14) toward the base seam (16) of the first bag (12) into the intermediate strip (24), characterized in that the opening appendage (28) in the intermediate strip (24) is delimited by a continuous separation slot (30), and tiers of a front side that lie on top of one another and a rear side of the bag (14) are provided in the region of the opening appendage (30).
2. Plastic bag strip according to Claim 1, characterized in that the separation slot (30) commences at the perforation line (18) and terminates at the perforation line (18), wherein the perforation line (18) is interrupted in a width region that is spanned by the opening appendage (28).
3. Plastic bag strip according to Claim 1 or 2, characterized in that the area and/or the shape of the opening appendage (28) corresponds substantially to the bearing face of a fully grown thumb of an adult in the region of the distal phalanx.
4. Plastic bag strip according to one of Claims 1 to 3, characterized in that the individual opening appendage (28) parallel with the extent D of the base seam (16) has an extent s, wherein 0.05 ≤ s/D ≤ 0.30, in particular 0.10 ≤ s/D ≤ 0.25, and preferably 0.15 ≤ s/D ≤ 0.20.
5. Plastic bag strip according to one of Claims 1 to 4, characterized in that the individual opening appendage (28) perpendicular to the base seam (16) has an extent h, and the intermediate strip (24) perpendicular to the base seam (16) has an extent H, wherein 0.50 ≤ h/H ≤ 0.95, in particular 0.60 ≤ h/H ≤ 0.90, preferably 0.70 ≤ h/H ≤ 0.85, and particularly preferably 0.75 ≤ h/H ≤ 0.80.
6. Plastic bag strip according to one of Claims 1 to 5, characterized in that the opening appendage (28) is provided so as to be substantially centric between a first longitudinal border (20) and a second longitudinal border (22) of the first bag (12) and of the second bag (14) that connect the respective base seam (16) with the perforation line (18).
7. Plastic bag strip according to one of Claims 1 to 6, characterized in that a first opening appendage and a second opening appendage that is laterally spaced apart from the first opening appendage are provided, wherein the first opening appendage and the second opening appendage are in particular disposed so as to be spaced apart in different directions from a central line of the first bag (12) and of the second bag (14) by a substantially identical value.
8. Plastic bag strip according to one of Claims 1 to 7, characterized in that the separation slot (30) of the opening appendage (28) adjoins the perforation line (18) in the manner of a sharp edge, wherein an angle α of 80° ≤ α ≤ 135°, preferably 90° ≤ α ≤ 120°, and particularly preferably 100° ≤ α ≤ 110° is in particular enclosed at the connection point between the separation slot (30) and the perforation line (18) .
9. Plastic bag strip according to one of Claims 1 to 8, characterized in that the perforation line (18) across the entire extent thereof runs so as to be substantially parallel with the base seam (16).
10. Plastic bag strip according to one of Claims 1 to 9, characterized in that the base seam (16) and/or the perforation line (18) run/runs so as to be a substantially straight line.
11. Plastic bag strip according to one of Claims 1 to 10, characterized in that the bags (12, 14) are rolled up so as to form a roll.
12. Plastic bag strip according to one of Claims 1 to 11, characterized in that the bags (12, 14) are produced from a tubular continuous material, in particular by welding and punching.

Images