EP0974526A2 - Blocks of baglets made of thermoplastic material film and method for their manufacturing - Google Patents

Abstract

The bag pack uses a bag which is blocked at one edge strip and with a perforated tearing line below the blocking. There is a weld seam in the region opposite the edge strip to form the bag bottom. Each bag is folded round a fold line running in the longitudinal direction of the bag. In the folded-in position, it is blocked in the edge region (R). The tearing line (107) is in the form of sickle-shaped cuts (107a) extending to the long side of the bag, so that the folded bags (1) are separated at the outer side edges (103a, b) from the blocked edge strip.

Description

The invention relates to a bag pack of bags made of thermoplastic film, the bags in Area of an edge strip at least in areas to the Packs are blocked and with one below the Blocking area formed perforated tear line to separate the bags from the blocked edge strip are equipped and in which the edge strip opposite area by means of a weld Bottom bag is formed.

Furthermore, the invention is concerned with a method for Manufacture of pouches from thermoplastic pouches Plastic, the pouch being made of a flat Plastic tubular film by welding one Bottom weld seam transverse to the longitudinal extent and direction of conveyance the tubular film and cutting the bag to length in parallel and next to it the bottom weld seam are manufactured and then in one Packs are piled up and in one of the bottom welds opposite edge area are blocked and in the Edge area of each pack after the storage has ended Bag a perforated tear line for single tear off the bag from the packing near the blocked edge area is punched.

Blocked packs of plastic bags are known to them serve as a supply for the individual removal of a bag if necessary, that of the blocked pack along one perforated tear line is torn off. Packing bags in addition, often in outer packaging or dispenser boxes offered for the individual removal, which is only an example reference is made to DE 94 08 149.2 U1 or US-A-5655 682.

The object of the invention is to pack a bag of bags made of thermoplastic plastic film and a To create procedures for this that can be trained in small format is, i.e. much smaller than the single bag and furthermore a clean tearing off of the individual bag from allows packing. The bag should also be sufficient Stability and strength not only through the selection of the Plastic film, but also in terms of sweat resistance have the bottom seam.

The object underlying the invention is in Packing bags of the generic type according to the proposal of Invention solved in that each bag of a pack around in For the purpose of extending the length of the pouch, the folded edges run Reducing the bag width is folded and in the Folding position on the pack is blocked in the edge area and the tear line of the folded bags in the form of sickle-like incisions is executed and the sickle-like incisions to the Long sides of the bag pack are enough and these long sides cut the bag so that the folded bags are attached to theirs outer lateral edges of the blocked Edge strips are separated, and between the crescent Incisions connecting webs are formed over which the Bags are connected to the edge strip in such a way that tear off the connecting bars when pulling off the bags.

The process of making packs of bags from bags thermoplastic film stands out according to the Invention characterized in that the tubular film before or after Weld the bottom weld by at least one in Longitudinal extension of the tubular film and the one to be produced Bag folded folding edge is folded and one out crescent-shaped, curved or half-wave incisions with narrow connecting bars remaining between them Compound tear line punched in the packs of bags is, the incisions also on the lateral edges of the Bags or packing are executed.

In order to bring large-format bags to small formats the individual bags before they are blocked in at least one in the longitudinal extension of the bag, that is, transversely to the Bottom weld seam and folded edge running to the opening edge folded, with multiple folding being preferred. Here can do the simple V-folding, so reducing the width of the bag by half or the so-called M-fold, i.e. three folded edges and reducing the bag width to one A quarter or four fold edges, depending on the width of the bag be made.

In order to reduce the bag length, it is proposed that the Packing of bags in its entirety transverse to the longitudinal extension of the Bag is wrapped once or twice. Here is an S-shaped or Z-shaped turn as possible as a C-shaped turn inside or just one one and a half or two and a half times envelope. In this way it is possible to pack large format bags in small format offer and then these small-format packs in appropriate dispenser boxes or envelopes or outer packaging for to offer individual removal.

It is for removing the individual pouch from the pack important that perforated at the intended The tear line does not tear the edge of the bag. For this it is proposed according to the invention that this tear line is made in the form of individual sickle-like incisions, these sickle-like incisions particularly on the Side edges of the folded bags or the bag pack are also executed, so that in this area of bags to be separated from the pack beforehand from the Edge strip is separated. The bags blocked in the packing are then only on a few bridges depending on the number of sickle-like incisions with the edge strip of the packing still connected, these connecting webs for Longitudinal extension of the bag pack are arranged symmetrically and thus an even tearing off of the bag and also the individual folds of the folded pouch from the edge strip allow, avoiding tears in the edge of the bag become.

The crescent-shaped ones are essential for the invention Incisions as perforations, which are garland-like Form trained tear line with long incisions, whereby here also wavy under crescent-shaped incisions Incisions of sinusoidal waves or arcuate Understand incisions or very elongated incisions are.

Advantageous developments of the invention are the characteristic features of the subclaims.

Instead of the previously used perforated tear lines, at which have a large number of short incisions or holes alternate about equally short intermediate bridges, as a result tearing with force along the entire tear line According to the invention, very few are required Leave connecting bars, which puts a strain on the bag only at these few in the area of the bag opening Set and thus a very clean quick tear off takes place without the bag in the area of the bag edge tear down. In addition, as a result of the sickle-like Notches a particularly favorable form of the connecting webs is left, which facilitates tearing off, without the Bag opening edge tears occur. The sickle-like Incisions are garland-like along the tear line arranged and with its largest bulge to the bag bottom the bag directed towards it. There are at least two sickle-like ones Incisions with an intermediate connecting web, preferably at least three sickle-like incisions or four sickle-like incisions with two or three intermediate and remaining connecting webs as Tear line provided on the bag pack.

Distances of the connecting webs of the tear line are preferred from 2 to 3 cm, the connecting webs a width at the Have a tear point of about 1 to 3 mm.

The formation of bags with tear lines that are in perforation in the form of punched half-waves, arches or sickles are easy and requires little strength the bags are removed from the pack without tearing Pouch film. A tear line of at least one is preferred three cuts and two between the cuts remaining connecting webs punched into the packs becomes.

The bottom weld seam of the blocked to the bag packs Bags can either be folded before or after getting produced. Provided the bottom weld of the bag across the full width of the spread bag at its Manufacture is made, it is a simple one Weld.

To increase the strength of the bottom weld of the bag it is suggested the bottom weld of each one Bag after its folding in the longitudinal extension of the Bag running folding edges across the width of the to produce folded bags. To this For example, an M-shape is folded in A so-called M-shaped bottom weld seam, which gives the bottom of the bag greater strength.

For the use of the bag packs, for example in Dispenser boxes, it may be appropriate in the edge strip of the Bag packing, in which the bags are interlocked, in at least one place or in two areas or lengthways of a linear blocking area also punch another slot in which one Fixing agent to fix the pack of bags in one place is insertable.

Fig. 1

schematisiert die Herstellung eines Beutelpackens mit eingefalteten Beuteln

Fig. 2,3

Details der Beutelfaltung in Ansicht und Querschnitt

Fig. 4

die Aufsicht auf einen Beutelpacken

Fig. 5

die Seitenansicht auf den Beutelpacken nach Fig. 4

Fig. 6

schematische perspektivische Darstellung eines Beutels mit Verblockungsrand

Fig. 7

den von dem Verblockungsrand gemäß Fig. 6 abgerissenen Beutel

Fig. 8

eine schematische Darstellung zum Herstellen einer weiteren Variante eines eingefalteten Beutels

Fig. 9

Details des eingefalteten Beutels gemäß Fig. 8 mit M-Bodenschweißnaht

Fig. 10

einen von einem Beutelpacken abgerissenen Beutel, hergestellt gemäß Fig. 8

Fig. 11

schematisch perspektivisch einen Spender mit einem eingelegten Beutelpacken.

Advantageous further developments of the invention are explained below with the aid of exemplary embodiments. Show it

Fig. 1

schematized the production of a bag pack with folded bags

Fig. 2,3

Details of the bag fold in view and cross section

Fig. 4

supervision of a pack of bags

Fig. 5

the side view of the bag pack according to FIG. 4

Fig. 6

schematic perspective view of a bag with blocking edge

Fig. 7

the bag torn off from the blocking edge according to FIG. 6

Fig. 8

is a schematic representation for producing a further variant of a folded bag

Fig. 9

Details of the folded bag according to FIG. 8 with M bottom weld seam

Fig. 10

a bag torn off a bag pack, produced according to FIG. 8

Fig. 11

schematically in perspective a dispenser with an inserted bag pack.

1 schematically shows the production of packs of bags represented by bags made of thermoplastic plastic film. For a simple bag, for example, it is assumed a tubular film 100 made of thermoplastic material, such as for example polyethylene, which is in the conveying direction T on a Welding station I is led past. Correspondingly in cycles the desired length of a bag is determined using a Sweat bar across the width B of the tubular film shown here corresponds to the width of the bag, a weld seam 101 welded to the later bottom weld of the bag forms. The conveyed in the conveying direction T. Sectionally welded hose 100 is in the area of Folding station II in the longitudinal extension of the bag and the Tubular film folded around the folding edges 120, see FIG. 2. With three folding edges with four folding parts, the Tubular film and thus the bag to a quarter of the width B decreased. In the example shown, the tubular film and thus the bag is folded in an M-shape 102, see also FIG. 3. The folded tubular film 102 becomes the cutting station III fed. Here the bags are parallel to the weld 101 and cut to length next to the weld 101 and the individual bag 1 and transported in a stack and Blocking station IV collected. In station IV are For example, two stacking needles 8 are provided, on which the cut individual bag 1 in the region of its opening edge - Opposite the bottom weld seam 121 - impaled and be collected into a pack P. Everyone on the already existing stacked bags will be in the area of Stacking needles 8 additionally blocked when pressed on, i.e. heat-sealed to the bags underneath. Two blocking points 105 are preferably provided, and the blocking station is accordingly with two welding stamps equipped. After collecting a desired number of Bags 1 to the desired bag pack P is the Tear line 107 punched into the bag packs and additionally if necessary, the slot 108 in the region of the edge strip R punched, see also Fig. 4. Station IV is included Punching tools in the shape of the desired tear line fitted. The bag pack P thus produced is then from the stacking needles 8 are lifted off and the further assembly and packaging supplied.

In Fig. 4 is the bag pack P, which in the stack and Blocking station IV is manufactured according to FIG. 1, again in represented individual. The stacking needles 8 leave small ones Holes 104 in the region of the edge strip R of the bag pack P, in addition to the small holes 104, the blocking areas 105 are arranged. It is also possible, for example the Bag between the two holes 104 of the stacking needles block and an additional slot if desired above, i.e. to punch towards the edge. The bag 1 itself are folded M-shaped in the example shown, see FIG. 3, blocked in the bag pack P according to FIG. 4. To the Separate the individual folded bags 1 from the Packing bags P is tear line 107 between edge strips R and the bag 1 formed. The tear line 107 consists of crescent-shaped incisions 107a, in the example shown three such incisions for a pack, as well as between the crescent-shaped incisions remaining narrow webs 107b. The sickle-like incisions 107a go to the Side edges 103a, b of the pack or the folded bags through, see Fig. 5, so that the individual bags 1 on the Edge strips R only over the narrow webs 107b are connected and when pulling in the direction of arrow Z, see Fig. 4, are very easy to tear off without the then tears occur. It is also due to the fact that across the width of the bag the largest area is already viewed through the incisions 107b is severed and only the smallest part of the width in Area of the webs 107b must still be cut. In particular, the webs 107b are symmetrical about the longitudinal axis X the bag arranged so that in a central attack in Z-direction on the bag and even tear off The same can be separated from the edge strip R. At the Die cuts 107a in station IV are Punching knife arranged so that a lateral overcut, see dashed line 107c in FIG. 4, indicated, so that it is always ensured that the lateral edges of the folded bags are already cut.

This process is schematic in FIGS. 6 and 7 shown again. From Fig. 6 it can be seen how the folded bag 1, 120 M-shaped around the longitudinal edges is folded, in the Z direction from the edge strip R is pulled off in order to then tear the torn bag 1 as shown in FIG. 7 with the through the crescent-shaped incisions 107a to get the marked opening edge. By Pull apart the two film sides of the bag in The direction of arrow S then becomes in the area of the tear-off edge Filling open.

8 is a further variant of the production of a Bag packs shown according to the invention. Here will a tubular film 100, which is laid flat and thus the Width B of a bag to be manufactured corresponds, in Conveying direction T first fed to a folding station II, in which in turn lay the flat tubular film, as in the 2 and 3 are shown, folded in an M-shape. The tubular film 102 folded in this way then becomes one combined welding and cutting station I, III fed, with a weld 101a across the folded Tubular film is designed as a bottom weld seam, see Fig. 9, which makes the bottom area of the bag a substantial one Experienced increase in strength. Simultaneously or after the Production of the bottom weld seam 101a over the folded one Tubular film and thus the folded bag is done Cut the bag 1 by cutting parallel and next to the Bottom weld and stacking in the subsequent stacking and Verblockstation IV. The further treatment of the bags in the The stack of bags for making the pack is the same as for Figures 1, 4 and 5 explained. After tearing off the produced bag packs you get a bag, as in the 10, which shows an M-shaped bottom weld seam 101a has and a corrugated tear-off edge 107 corresponding to the Has sickle-shaped incisions of the tear line. After this The bag can be torn off by packing Pull the foils apart in the direction of arrow S. can be.

The bag packs produced according to FIG. 1 or according to FIG. 8 can be resized to another smaller format by folding them across the length of the pack be either single or double in V-shape or Z-shape, and then wrapped up in an outer packaging or dispenser become. Outer packaging and dispenser can then be one Have handle recess, which allows the bags from packing by tearing off the blocked edge strip separate and remove.

A perspective view of a dispenser 2 is shown schematically in FIG. 11 shown having a flat cuboid shape Top 20, narrow long sides 26, 27, a head edge 25 and opposite lower edge 22 and one the lower edge 22 adjoining the bottom. In the dispenser 2 is a pack of bags P with bags 1 inserted, the Bag in an edge region R, which is parallel to the top edge of the Dispensers run together in two areas 105 are blocked and preferably in the middle by an edge strip R continuous slot 108 is formed by punching. The individual bags are on a tear line 107 with the Edge strips connected, this tear line of four garland-shaped, sickle-shaped or arcuately punched incisions 107a and three there is narrow connecting webs 107b therebetween. In the top 20 of the dispenser 2 is approximately of the middle Area starting from where the edge strip through the tear line 107 is marked, the handle recess 21 is formed. The Handle recess 21 goes to the lower edge 22 of the dispenser through and has, for example, a slightly conical widening Form towards the exit. The handle recess is so large that can be comfortably reached through with one finger by pressure on the bag and at the same time pulling off Arrow direction Z, i.e. towards the bottom edge, a bag 1 of the border strip R at the tear line 107 and can be pulled out. The handle recess 21 takes for example in the area of the lower edge a third of the Width A of the dispenser.

The handle recess is in the area of the lower edge 22 in Direction of the two narrow long sides 26, 27 through on the Bottom to the bottom edge formed by the top adjacent formed columns 23, 24 on a Width w widened. This way the bottom edge 22 of the dispenser following the handle recess 21 Pull-out slot with a length m corresponding to approximately the width the folded bag 1 arranged in the bag pack educated. The handle recess 21 and the through the column 23, 24 pull-out slots formed run on successive ones Sides of the dispenser. The one attached to the top 20 Handle recess 21 allows gripping the top one Bag for peeling it off from the edge strip R while the subsequent pull-out slit on the lower edge of the easy pulling of the gripped bag 1 over its entire width through the correspondingly wide pull-out slot from the dispenser 2 in the direction of the arrow Z, as in dashed lines shown, enables.

The invention enables the production of small formats Bag packs containing large-format bags, as well appropriately small-sized donors. By training the Tear line according to the proposal of the invention Crescent-shaped incisions become a particularly easy one Tear off, in a controlled and orderly way Bag from packing along tear line 107 allows without tearing the bag in the area of the Bag opening takes place. Furthermore, the strength of the Bag by appropriate training of the bottom weld folded bags are made as an M weld.

In addition, an appropriate training can Dispensers or dispensers with a handle recess and additional pull-out slot for the orderly removal of individual Bags are made from the bag packing and ensured become.

Claims (13)

Bag packing of bags made of thermoplastic plastic film, the bags being blocked in the area of an edge strip, at least in some areas, for packing and equipped with a perforated tear-off line formed below the blocking area for separating the bags from the blocked edge strip and in the area opposite the edge strip by means of a weld seam A bottom pouch is formed, characterized in that each pouch of a pack is folded in around fold edges (120) extending in the longitudinal extent (X) of the pouch in order to reduce the pouch width (B) and is blocked in the fold-in position on the pack in the edge region (R) and the tear-off line (107) of the folded-in bags is stamped into the bag packs in the form of sickle-like incisions (107a) and the sickle-like incisions extend to the long sides of the bag pack and cut through these long sides of the bags so that the folded ones Bags (1) are separated at their outer lateral edges (103a, b) from the blocked edge strip (R) and connecting webs (107b) are formed between the crescent-shaped incisions, by means of which the bags are connected to the edge strip, in such a way that the connecting webs (107b) tear through when pulling off the bags. Bag packs according to claim 1,
characterized in that each bag (1), viewed in cross section, is folded in an M shape to a quarter of the bag width. Bag packs according to claim 1 or 2,
characterized in that the crescent-shaped incisions (107a) are formed in the garment-like manner with their largest bulge toward the pouch bottom of the pouches. Bag packs according to one of claims 1 to 3,
characterized in that at least two with an intermediate connecting web (107b), preferably at least three sickle-like incisions (107a) with two intermediate connecting webs (107b) form a tear line (107) for a bag pack. Packing bags according to one of claims 1 to 4,
characterized in that the bottom weld seam (101) of each bag is formed over the entire width of the bag (B) before it is folded around folding edges (120) extending in the longitudinal extent of the bag. Packing bags according to one of claims 1 to 4,
characterized in that the bottom weld seam (101a) of each bag, after it has been folded in, is designed to run around the folded edges (120) extending in the longitudinal extent of the bag over the width of the folded-up bag. Packing bags according to one of claims 1 to 6,
characterized in that the bags are blocked on at least one, preferably two, regions (105) arranged symmetrically to the longitudinal extent of the bags. Bag packs according to one of claims 1 to 7,
characterized in that a slot (108) is continuously punched through the edge strip (R) of the pack between the blocked areas (105). Bag packs according to one of claims 1 to 8,
characterized in that it is folded parallel to the tear line and transversely to the longitudinal extent of the bags at least once in order to reduce the size. A method for producing bag packs from bags made of thermoplastic material according to one of claims 1 to 9, wherein the bags are made of a flat plastic tubular film by welding a bottom weld seam transverse to the longitudinal extent and conveying direction of the tubular film and cutting the bags to length parallel and next to the bottom weld seam and thereafter are stacked in a pack and blocked in an edge area opposite the bottom weld seam, and a perforated tear-off line for the individual tearing of the bags from the pack near the blocked edge area is punched into the edge area of each pack after the storage of further bags has ended, characterized in that a) the tubular film is folded in before or after the welding of the bottom weld seam (101a) by at least one fold edge (120) extending in the longitudinal extent of the tubular film and the bag to be produced, and b) a tear-off line composed of sickle-shaped, curved or half-wave-shaped incisions with narrow connecting webs remaining therebetween is punched in the packs of bags, the cuts also being made on the lateral edges of the bags or the pack. A method according to claim 10,
characterized in that the tubular film is folded in an M shape to a quarter of its width. A method according to claim 11,
characterized in that the bottom weld seam is produced via the M-shaped folded tubular film. A method according to claim 10,
characterized in that a tear line of at least three incisions and two connecting webs remaining between the incisions is punched in the packs in such a way that the largest bulge is directed towards the bag bottom.

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