EP1036741B1 - Bag stack, method for manufacturing and filling such bags and device for its manufacturing - Google Patents

Abstract

The pile of connected plastic bags, e.g. for an automat, has a perforated line (9) across each corner section (11). A peg (12) which holds the pile together and in position is inserted through each corner section, but the perforations allow individual bags to be torn off ready for use. Independent claims are included for: (a) a process for preparing and filling the plastic bags and (b) a device for filling the bags.

Description

The invention first relates to a stack of a plurality of each other connected bags of plastic film, in particular vending bags, with a Einfüllöffnung and a one-sided flap, the stack openings and at least one An interface has.

In the continuous production of bags, it is well known, the bags in one previously determinable number to so-called bag stacks in a collection device gather. As collecting device, for example, a pin stack conveyor is suitable with a pin stack conveyor chain moving in a horizontal direction, which receives the separated bags on stacking pins. In every bag are the Stamped holes stacking, the distance between the distances of the stacking pins on the Correspond to pin stack conveyor chain. It is further in the production of the bag stacks known to fix them by a wire hanger (wicket) in such a way that Leg of the wire hanger through the stacking openings in the flap part of the bag be passed. For this purpose, either the bag stack of the Stacking pins of the pin stack conveyor lifted and with the now loosely stacked Put bags on the legs of the wire hanger or the legs the wire hanger into hollow groove-like recesses of the stack pins of the pin stack conveyor chain plugged in and removed in this way the respective bag stack. to Stabilization of bag stacks and protection against damage by the ends the wire hanger in the common packaging of several bag stacks are these inserted between a front and back cover sheet and additionally through to the Legs of the wire hanger plugged on washers or rubber stoppers secured. All of these operations are usually done manually by an operator executed.

Apart from the considerable amount of auxiliary materials can be such Bag stacks are difficult to package and transport because of the stubborn wire hangers.

Also during the packaging process, d. H. when filling a bag with a product, For example, with a bread or the like, there are significant disadvantages. At the Filling process is the inserted through the punched stacking openings Wire bracket to the bag stacks in the packaging machine, such as a Packing machines, fasten. Since during the packaging process, the filled product, eg. B. a Bread is peeled together with the bag enclosing this It follows that the filled bag is conveyed linearly to a closure device. The linear withdrawal of the bag with filled product does not require just one exactly designed in the measure guide bag, but it also comes to a sudden tearing of the usually between the stacking openings and the Front edge of the flap located Anschnittstelle. The "fringed" edge of the Flap not only gives the bag an ugly appearance, but also it Add to that the flap surface is no longer safe for the safe Attachment of closure elements, such as adhesive labels or the like and / or as Surface suitable for printing or taking notes.

Finally, after filling all bags, if necessary, the wire hanger again to the confectioner, d. H. transported back to the manufacturer of the bags, according to sizes sorted and, if necessary, processed so that they can be used again can.

From US patent 5,030,191 is a stack of a plurality of each other connected bags of plastic film known, each having a filling opening and a have one-sided flap. The flap each contains a corner section limiting, at an angle to the filling opening extending perforation lines. In each Corner section is a block connecting the bags together in the stack and in an inner area of the flap bounded by the perforation lines Stacking openings are arranged. The stacking openings for collecting the bag too At the same time, a stack of bags serve as suspension openings on which the finished stack is hung in a filling machine. When tearing a single bag from the Stacks remain hanging the suspension holes on the flap. There are cracks, which form the Affect the appearance of the bag.

WO 93/13936 discloses a device for the continuous production of stacks a plurality of interconnected bags made of plastic film known, the one Perforating device, a cross-cutting welder and a blocking device having. The blocking device has no Lochverblockungswerkzeuge.

The automatic filling of bags that have a one-sided flap and collected in a bag package is described in US 3,126,094. The Bags are held in the bag package by metal clips.

The invention is based on the object, a bag stack of the type mentioned to create that manages without complex tools and thereby significantly easier to handle, in particular packaging and filling leaves, and about it also characterized by an attractive appearance. At the same time, a procedure suggested by having blocked bags, especially vending bag, with Easy to create good appearance in the edge area and fill comfortably and cleanly to let. Furthermore, a device for producing and filling of blocked bags be created that manages without complex tools.

This problem is solved with respect to the product that a stack of a Variety of interconnected bags is formed, which has a filling opening and a one-sided flap included. The flap has in each case a corner section delimiting perforation lines running at an angle to the filling opening, wherein in each corner portion at least one of the bags in the stack with each other connecting occlusion site and in a limited by the perforation lines inner area of the flap stacking openings are arranged. The blocking points in the corner sections are in the form of a Verblockungsloches as Aufhängeöffnungen formed for the stack.

Such a trained stack can be easily produced, transport and convenient just as easy to fill. First of all, that is crucial to the otherwise required wire hanger can be completely dispensed with. In particular, can the Production and further handling of the bag much cheaper, since the costs and if necessary the transport of the wire hanger between and between the Packer and the confectioner omitted. It is only necessary in the packing area to separate the topmost bag from the bag stack quickly and safely keep the bag in such an open position that the product (bread) can be inserted into the bag trouble-free. This can be at a after the to achieve handling process according to the invention achieve that for filling the respective uppermost bag of the bag stack of bags at least in Area of its filling opening and / or the flap in such an open position is held that the perforation between the corner sections and the flap inevitably at least partially torn and thereby the bag from the Verblokkung in the stack is at least partially solved.

Appropriately, the tearing of the perforation takes place before the packaged Product is inserted into the bag. This one has it in a simple way the hand to ensure a precise break along the perforation lines.

The tearing of the perforation by the opening process can be regulated exactly, namely the fact that the design of the perforation lines, in particular their Angular position and / or strength and / or their continuous or shortened course between the side wall and the end edge of the flap and the opening operation be matched when filling a bag.

Furthermore, this approach makes it possible that by the opening process both the perforation between the captured corner portions and the flap torn open, as well as the bag loosened from the bag held in the open position becomes. In this way, two functions are solved by a process, namely tearing open the perforation and holding the bag during the packaging process.

If you want to achieve a precise demolition, among other things, the clinging must or the blocking of the bag or bag stack special attention be given. A particularly favorable solution arises when in the Corner sections attached blockages formed as Verblockungslöcher and the bag stack when filling the bag on these blocked suspension openings suspended and / or held.

In such a suspension of the bag stack can in the remaining flap in principle on particularly large punched holes as suspension openings, as they were previously for the Wire hangers were necessary, waived. However, the bags in one Collecting collecting device during the manufacturing process, the stacking openings either generated by pinholes or to form the stack openings Cross slits punched in the flap.

In terms of the device, the holding of the opened bag and its This makes it particularly easy to reach the bag stack in the filling station when a spreader in a sole the at least partially the demolition of the to be filled bag causing demolition position is movable. The breakaway position can preferably correspond to the open position, which is necessary to a product or to fill a loaf. In contrast to the previous function of a spreading device, the only the forming of the bag opening had the task, which in about the shape and the Dimensions of the product to be packaged, has the current spreader two additional functions to the content, namely once the bag during the To hold the packaging process and on the other hand, the opening movement such Make that by the spreading the perforation completely or almost completely is broken up.

Holding the bag stack in a packer is ultimately facilitated by that below the plane of movement of the spreading of the spreader a Clamping plate is provided and finally an adapter is used in the distance the blocking holes of the bag pile handrails and with interposition a transverse tab attachment rods, whose distance and diameter the Dimensions of the legs of a standard wire hanger (wicket) or mandrels correspond to the packaging machine. The use of this adapter has the significant advantage that the usual packaging machine or the packaging machine, such as he was previously used for the use of wire hanger, not or hardly changed must become.

In addition, the use of an adapter gives the possibility of the handrails in their Form length so that several comparatively large bag stack stacked so that, overall, also the productivity in packaging is noticeably increased.

Figur 1

einen zum Stand der Technik gehörenden Beutelstapel mit einem Drahtbügel,

Figur 2

einen Beutelstapel aus Beuteln nach Figur 3,

Figur 2a

eine der Figur 2 entsprechende Darstellung eines Beutelstapels bestehend aus Beuteln gemäß Figur 3a,

Figur 3

eine erste Ausführung eines Beutels,

Figur 3a

eine abgewandelte Ausführung eines Beutels,

Figur 4

eine schematische Seitenansicht einer Beutelherstellmaschine,

Figur 5

eine Aufsicht auf eine Füllstation mit einer Vorrüststation einer im einzelnen nicht dargestellten Verpackungsmaschine, beispielsweise eines Packautomaten,

Figur 6

eine perspektivische Darstellung eines Teils einer Verpackungsvorrichtung der Füllstation,

Figuren 7 bis 9

Einzelheiten eines Verpackungsvorgangs,

Figur 10

ein fertig verpackter Beutel,

Figur 11

eine Einzelheit im Verschlußbereich eines verpackten Beutels,

Figur 12

eine perspektivische Darstellung eines Beutelstapels mit einem diesen aufnehmenden Adapter,

Figur 13

eine abgewandelte Ausführung des Adapters mit mehreren Beutelstapeln,

Figur 14

eine Aufsicht auf eine Kunststoffolienbahn zum Herstellen von Doppelfolienbahnabschnitten und

Figur 15

eine Ablageeinrichtung in Form einer Stiftstapelfördereinrichtung mit einem Doppelbeutelstapel.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it:

FIG. 1

a prior art bag stack with a wire hanger,

FIG. 2

a bag stack of bags according to FIG. 3,

FIG. 2a

2 a representation of a bag stack consisting of bags according to FIG. 3a,

FIG. 3

a first embodiment of a bag,

FIG. 3a

a modified embodiment of a bag,

FIG. 4

a schematic side view of a bag making machine,

FIG. 5

a view of a filling station with a Vorrüststation a not shown in detail packaging machine, such as a packing machine,

FIG. 6

a perspective view of a part of a packaging device of the filling station,

FIGS. 7 to 9

Details of a packaging process,

FIG. 10

a ready packed bag,

FIG. 11

a detail in the closure area of a packaged bag,

FIG. 12

a perspective view of a bag stack with this receiving adapter,

FIG. 13

a modified embodiment of the adapter with several bag stacks,

FIG. 14

a plan view of a plastic film web for producing double film web sections and

FIG. 15

a storage device in the form of a pin stack conveyor with a double bag stack.

According to FIG. 1, a bag stack 1 has a conventional manner in the region of a flap 2 Stacking openings 3, through which a wire bracket 4 is inserted therethrough. With the help of Wire bracket and on the legs 5 plugged rubber plugs, not shown the bag stack can be held together more or less well.

Each bag has a 6 indicated with the filling opening over which the bag in weiter below described manner with a product, such as a bread or the like can be filled. The flap 2 has in each case in the area between the Stacking openings 3 and a front edge 7 of the flap 2 an Anschnittstelle. 8

A bag stack 1 according to Figure 1 is usually in a collecting device with the Wire bracket 4 equipped and together with this and other aids, such as the Rubber plugs, cover sheets, etc. packed in boxes and fed to a bottling plant.

With the help of the wire hanger 4, the bag stack 1 in a packaging machine, for. B. a packing machine, kept that way with the support of air and / or suckers and a spreader, the uppermost bag of the bag stack in a Opening position is brought. The product to be filled, z. B. Bread, is about the Filling opening 6 in the opened held bag, z. B. with Hile a not shown Slider inserted. By the withdrawal force generated thereby, the bag is along the provided in the stack opening opening 8 torn so that the Bag is released from the bag stack. The linear tearing of the bag is a smooth Front edge 7 of the flap 2 excluded, d. H. the bag owns because of the comparatively large Stapellochausstanzungen and the cracks an ugly appearance.

FIG. 2 shows a first embodiment of a bag stack formed according to the invention illustrated, extending in the region of the flap 2 from obliquely to the filling opening 6 Perforation lines 9 has limited corner sections 11. The perforation lines 9 extend continuously from the side edges of the bag to the front edge 7 of the flap 2. In the corner sections 11 are blocking points 12, with the help of the made of plastic film bag in the bag stack 1 are held together. The Verblockungsstellen 12 are formed as Verblockungslöcher and thereby provide the Possibility to closer the bag stack in the automatic packaging machine on one below hang or hold described holding device.

For collecting the individual bags to the bag stack 1 in a collecting device of a Bag making machines serve stacking openings 13 in one through the perforation lines 9 limited central region of the flap 2 are arranged and, for example are formed by needle pricks according to FIG. This means that the individual bags in The collecting device are skewered on needles and so before blocking initially kept in the bag stack 1 in a correct position. Instead of pin pricks can the stacking openings 13 also z. B. of cross slots 13 'may be formed, as well as this is shown in Figures 2a and 3a.

FIG. 3 shows a single bag of the bag stack according to FIG. 2, that the perforation line 9 is not performed up to the front edge 7 of the flap 2, but rather an unperforated part remains, which is indicated in Figure 3 with S. This distance S can be variable depending on the withdrawal force in a packing machine being held. Finally, the angle of the perforation line 9 - as at 9 ' indicated - and finally the perforation strength can be varied. Based on these conceivable changes in the corner perforation can be - like the closer below is explained - a certain tear behavior of the perforation lines 9 or 9 'optimally determine.

For producing bags and bag stacks 1 according to the invention, an in Figure 4 illustrated bag making machine 14. The bag making machine includes a Abwickelstand 15 with a winding roller 16 made of a thermoplastic plastic sheet. The latter can be formed, for example, as a flat film web 17. The Flat film web 17 is within an only schematically indicated processing status 18 on therein housed, not shown guide rollers, a folding device and Guided tensioning rollers. The processing stall 18 has a bottom fold insertion device 19 on. Behind the processing state are a perforation 20 and a Kreuzlochstanzeinrichtung 21 for introducing z. B. Phillips 13 'arranged. Of the Punching device 21 follows a transverse welding separation device 22 and a transfer device 23, to which finally a stacking device 24 with a pin stack conveyor 25 connects. In the area of the pin stack conveyor 25 is finally a blocking station 26 is arranged. One of them can not Connect the illustrated unloading station for the blocked bag stacks 1.

FIG. 5 shows part of a packing machine 27. The automatic packing machine 27 has a Pre-fitting station 28, which is pre-stored a filling station 29 explained in more detail below and serves to prepare bag stacks 1 for filling. In the Vorrüststation 28 will be one or more blocked bag stacks 1, the one or more on a support surface 31st lie, held by a holding device 32. The latter has a special, im Related to the filling process described below Adapter 33 on. According to the arrow 34, the ready-prepared bag package is the Filling station 29 supplied and stored there on a stacking table 35, which - as shown in FIG. 6 emerges - is designed adjustable in height. The bag stack lies in the Filling position with its flap 2 of the uppermost bag of the bag stack 1 at one Stop plate 36, whose one, substantially horizontal web 37 in the area the flap 2 of the bag protrudes, while the other, preferably vertically to the web 37 extending web 38 of the clamping plate, for example, a stop for the Represents front edge 7 of the bag.

For clarity, in Figure 6, the above-mentioned adapter 33 from Bag pile 1 shown separately, although in reality with handrails 39 in the Blocking openings 12 of the bag stack 1 is inserted. The adapter has a Transverse strap 41, on which the holding rods 39 side facing away mounting rods 42 are arranged. The distance and diameter of the two support rods 42nd corresponds to the dimensions of a conventional wire hanger (wicket), as previously in Packing machine has been used for filling vending bags.

The actual filling process will be described below with reference to FIGS 7 to 9 in detail explains:

The packaging machine includes, inter alia, an air blowing device 43 (FIG. 7). Instead of blowing air and a suction device may be provided. Furthermore is an opening device with a spreader 48 is provided, the lower Spreading elements 49 and upper spreading 51 and has - as shown in Figure 8 emerges - are retracted into the pre-opened filling opening 6 of the uppermost bag can. By spreading the bag at least in the region of the filling opening 6 of the opened bags from the side edge of the bag along the perforation lines 9 separated from the bag stack (Figure 9). The bag is alone at the filling opening the spreading of the spreader and in the flap 2 from the web 37 of the Clamping plate 36. Through the open expansion elements is now a product, For example, a bread 52, by a direction indicated by the arrow 53 slide or put a pair of pliers in the bag and then the bag along with the bread supplied to a closure device, not shown. In Figure 10 is ready shown packaged bread packaging, which can be seen from it, but also from Figure 11 that the edge area of the zippered bag closure no fringed edges has more and thus the packaging receives a handsome appearance. With decreasing Height of the bag stack, the stacking table 35 against the clamping plate 36th booted.

From Figure 12 it can be seen that the support rods 39 of the adapter 33 substantially longer as the attachment rods 42 are. This creates the opportunity, too several stack of bags stacked on the adapter 33, as for example is shown in FIG.

Depending on the size and weight of hygiene bags are instead of the Wicketklammem ever Stack of fastening sleeves, preferably made of plastic material used to the safely and selectively brought bag packages into the packing machine to these there to fill.

Due to the inventively designed bag or stack of bags can Fixing sleeves and their manual handling omitted. In the packing machine can also be several stack of bags stacked. This will be the automatic packaging process significantly less affected than was previously the case has been.

Instead of cross slots z. B. also star-shaped slots or the like be punched. The decisive factor is that no material waste is generated.

As a retaining means for the corner sections are also a clamping device or z. B. solid support bolts of the packaging machine conceivable. What matters is that when Opening process of the bag to be filled whose stretched posture, especially in Area of the flap, is ensured.

From a indicated in Figure 14 with dotted lines two-ply Kunststoffolienbahn 50 are each two opposing single bag 50 'produced. To this purpose can be symmetrical to a central parting line 54 from the one film layer a strip are cut out, so that in the other film web, the flange Flap 2 remains. Alternatively, it is possible, for example, the tubular Cut plastic film web longitudinally and on both sides of the mean dividing line 54 to lead the tubular film web such that also in the a film web the desired supernatant for the flap 2 remains.

The provided with the corner perforation sections 11 and separated from the web, but still contiguous single bag are over in the flap 2 resulting stacking openings 13, which are formed by needle stitches of needles 55 in FIG. 15 indicated stacking device 24 in the form of a pin stack conveyor 25 is formed are hung in batches. After that, the two opposing bag stacks 1 blocked by blocking points 12 together, after which the double bag stack is divided by a separating cut along the dividing line 54 into two bag stacks 1. If the blocking points 12 are formed as Verblockungslöcher, they can as suspension openings for the suspension of the bag stacks in the automatic packaging machine be used.

Claims (18)

1. Stack consisting of a multiplicity of interconnected bags made from plastic film, in particular vending machine bags, with an introduction orifice (6) and a one-sided flap (2) which has perforation lines (9, 9') in each case delimiting a corner portion (11) and running at an angle with respect to the introduction orifice (6), at least one blocking point which connects the bags in a stack (1) to one another being arranged in each corner portion (11), and stack orifices (13) being arranged in an inner region of the flap (2), the said inner region being delimited by perforation lines (9, 9'), characterized in that the blocking points in the corner portions (11) are designed in the form of a blocking hole as suspension orifices (12) for the stack (1).
2. Stack according to Claim 1, characterized in that the perforation line (9, 9') is designed essentially as a straight line.
3. Stack according to Claim 1 or 2, characterized in that the perforation line (9) is designed to be perforated continuously from the respective side edge of the bag as far as an end edge (7) of the flap (2).
4. Stack according to Claim 1 or 2, characterized in that the perforation line (9') is designed to extend from the respective side edge of the bag almost as far as the end edge (7) of the flap (2) so as to leave an unperforated zone (S).
5. Stack according to one or more of Claims 1 to 4, characterized in that the stack orifices (13) are formed by pinholes.
6. Stack according to one or more of Claims 1 to 4, characterized in that the stack orifices (13) are formed by cross slots.
7. Stack according to one or more of Claims 1 to 6, characterized in that stack is formed from a divided double bag stack.
8. Method for the continuous production and handling up to the filling of bags made from a thermoplastic film web, in particular vending machine bags, having the following features:

   a flat plastic film web folded round to form a flat strip projecting on one side is delivered,

   perforation lines (9, 9') running at an angle with respect to the introduction orifice (6) of the bag are introduced, in the region of the flap (2), into film web portions of the plastic film web delivered and corner portions (11) are thereby formed,

   the bags are collected in stack form and, during or after stacking, are blocked together with one another by means of blocking holes formed in the corner portions (11) and designed as suspension orifices (12) for the bag stack (1),

   for filling a bag with a product in a packaging machine, the bag stack (1) is suspended and/or held by the blocked suspension orifices (12),

   the respectively uppermost bag of the bag stack (1), in order to be filled with the product, is held, at least in the region of its introduction orifice (6), in a maximum opening position such that the perforation between the corner portions (11) and flap (2) is positively broken open and the bag is thereby released from the bag stack, and

   the introduction orifice (6) is subsequently closed.
9. Method according to Claim 8, characterized in that the perforation is broken open before the product to be packaged is pushed into the bag.
10. Method according to Claim 8 or 9, characterized in that, as a result of the opening operation, both the perforation between the retaining corner portions (11) and the flap (2) is at least partially torn open and the bag at least partially released from the bag stack is held in the opening position.
11. Method according to one or more of Claims 8 to 10, characterized in that the configuration of the perforation lines, in particular their angular position and/or thickness and/or their continuous or shortened run between the side wall and the end edge of the flap, and the opening operation during the filling of a bag are coordinated with one another.
12. Method according to one or more of Claims 8 to 11, characterized in that, in addition to the blocked suspension orifices (12), stack orifices (13) are introduced in the region of the flap (2) during bag production.
13. Method according to Claim 12, characterized in that the stack orifices (13) are produced without material waste, for example by means of pinholes.
14. Method according to Claim 12, characterized in that, to form the stack orifices (13), cross slots are pinched into the flap (2).
15. Method according to Claim 13, characterized in that double film web portions are suspended symmetrically via stacking pins of an intermittently movable stack-conveying device and are thereafter divided into two bag stacks by means of a longitudinal severing cut.
16. Apparatus for the continuous production of stacks consisting of a multiplicity of interconnected bags made from plastic film, in particular vending machine bags, which are designed according to one of Claims 1 to 7, having the following features:

    a perforating device (20) with perforating tools which are arranged obliquely with respect to the direction of movement of a folded-round plastic film web and which, in a flap strip of the plastic film web, the said flap strip projecting on one side, introduce, in order to form corner portions (11), perforation lines (9, 9') running at an angle with respect to the introduction orifice (6) of the bag,

    a cross-weld severing device (20),

    a blocking device (26) which has hole blocking tools for forming, in the corner portions (11), blocking holes designed as suspension orifices (12) for the stack (1), and

    additional tools for forming stack orifices (13) in the inner region of the flap (12), the said inner region being delimited by perforation lines (9, 9').
17. Apparatus according to Claim 16, characterized in that it has a pinhole-pricking tool for forming stack orifices (13).
18. Apparatus according to Claim 17, characterized in that it has a cross-slot punching tool for forming stack orifices (13).

Images