DE2059105C - Device for the production of plastic carrier bags - Google Patents

Description

The invention relates to a device

ίο for making plastic carry handle bags with a dimensionally stable handle welded to the upper edge of one of the pocket walls, an edge wrap the other pocket wall and one in the fold line between this pocket wall and the Randumsch'.ag provided through slot for the bag handle, with devices for the step-by-step advancement of a plastic film semi-tubular web with a wider and a narrower layer to form the through-slots in the wider one Track position. Welding the handles on the shorter track layer. Fold over the edge of the wider one Layer under the narrower layer and for forming and separating the individual pockets using separating welds transversely to the longitudinal direction of the web. Kunsisiof f-

Carrying bags with only one dimensionally stable welded on Carrying handle on one side wall, which through the push-through opening in L'mschlagfalz the other, with the side wall provided with the edge flap can be passed through, so that the carrier bag in the filled state with security through the edge fold running over the filling opening against dust and moisture is protected, have become more and more popular on the market. The envelope flap can bc, these bags be designed so that they he ^ t

after inserting the handle over the bag opening is turned over. However, it can also be fastened with its side edges en the side edges of the carrier bag when it is turned over, in which case the handle with the upper one

Part of the other side wall is pushed under the envelope flap and has to be inserted through the push-through opening. This embodiment has the advantage over the first-mentioned that the edge flap cannot be turned up by improper handling by the user of the carrier bag or by strong wind, so that the compulsory covering of the bag opening is always guaranteed.
For the production of this last-described embodiment of the plastic carrier bag, it is necessary for a plastic film half-tubular web with a narrower and a wider layer to punch the through-slots, the edge of the wider half-tubular layer below the narrower one

Turn the position over, attach carrying handles to the narrower position, each in the middle between the carrying handles to attach punch-outs to the narrower layer, which extend from the edge over the entire width of the The edge of the other half-tube layer

stretch, and finally severing welds running transversely to the longitudinal direction of the semi-tubular web for separating the individual carrier bags and at the same time making their side welds to undertake the recesses of the narrower half-tube layer formed by punching out are passed through. A carrier bag manufacturing machine has already become known for this purpose, in which a punching device

tune a folding device to punch out the Duichsieck slits in the HalWhlauch web of the edge of the wider half-sleeve layer below the narrower layer, then a welding device with handle magazine and feed slide for transporting the individual handles in <iie welding position, on the welding station one Punching device for punching out the edges and finally the cross-cut welding station. Du-c "; the number of these stations results in one \ er '~! ::'. t: -ii "~ very space-consuming and costly dimensions

I ^: for making the entrance? at first; Carrying bags described in the first place with a rimmed edge. which is only turned over after the pocket has been filled with the pocket: the handle through the through-slot * exercises the opening, i.e. at the edges of the stern with the pockets -: "side edges not \ e -" - . is .inden it is already known to -in and Derst · '■ · λ station punching out the through-slots u d ^ welding the carrying handles make "i against between the two layers of Halbst.- -..!. uches reaching abutment welds the handles from above and the push-through slots g:. ■ ..mzt from below. Attempts have now been made to use this Starzu: ^; . Welding station also for the production of T: - 'pockets with side honored Randum-S- ". ig to use. Here, after the A "s-": ven of the passageway and the attachment to the carrying handles, the wrap-around part of the wider Halb- <.- ikiuchlage had to hit under the narrower H3lbschlauchi. It has been found that c- causes considerable difficulties which are already π. The half-tube layer provided with the handles on Ab- y .: id from the wider half- tube layer and after c inl'm and knocking back to this: · .'clock because the stiff handles cannot cling to the curved devices after-!. It is also important here that the half-tubular web n: t is already welded on one edge of the support brackets and thus with a strong unilateral load, for which reason the transmission of the tensile force of the pulling roller pair upstream of the separating welding station is impaired by the punched-out edges, must be performed over a relatively long distance. In the case of thinner plastic films, this strong one-side loading of the semi-tubular web that is to be moved forward intermittently can lead to tearing at the ends of the cutouts.

The invention is therefore based on the object of creating a way to reduce the space requirement and Costs for the production of a machine to produce the carrier bags described without difficulties when turning over the envelope and further transporting the foils caused by the welded handle. According to the invention, this object is achieved by that the devices for punching out the push-through slots and for welding on the carrying handles united in one station and the facility for transshipment de? The edge of the wider position are connected downstream, the tool for punching out the push-through slots parallel to the half-tube plane can be moved back and forth, and that between the punching and welding station and the cross cutting welding station a station for punching out Recesses on the edge of the narrower half-tube layer, which are centered between successive Carrying ribs extend over the entire width of the envelope, the other half-tubular layer. The task of the invention is thus solved by the novel proposal, the

slot not, as usual, with still flat Punch out half tube, but after folding over the edge fold from the side. the This avoids the disadvantages outlined above. because a fold that has the edge fold

o send half-hose layer after welding on the carrying handles is no longer necessary and the welding Bune of the handles and the punching out of the push-through loops made in one and the same station

can be.

It is useful. if de: station for turning over the edge of the wider half-tube layer under the narrower half-tube layer, another edge turning and welding point is connected upstream. where the welding of the first folded ίο edge seam takes place below the later fold line of the second, double-layer edge fold. In this way, a desirable gain is the having the insertion slot and carrying the carrying case aufnehmena the fill weight ₅ reaches the pocket wall by being double-layered on each side of the fold line and the two layers on the other side of the fold line are welded together

The station for punching out the push-through slots and for welding on the carrying handles has advantageous a U-shaped one. between the two hose web layers and behind the folded back abutment for the sealing bar that can be moved up and down for welding the carrying handles to the narrower hose sheet layer and for dj> horizontally moving forward and backward punching knives for punching the through slot .; in the edge of the wider one Hose sheet position on.

About the folding of the already double-layered advice. Jsaumes determine what on the basis of the particular Flexibility of the plastics is expedient. because a simple fold will recede would, according to a further proposal of the invention, a pair of press rollers for the hem-folded edge arranged behind the station for turning the edge hem under the narrower half-sleeve layer.

It is advantageous to design the device described in such a way that it is used to produce the two at the outset Described variants of the carrier bags with a handle welded to one wall and to the other Wall provided through slot and edge envelope can be used. To this The station can be used for punching out the edge recess the narrower half-sleeve layer can be exchanged and the edge folds back by 180 ° Folding tool be replaceable. In addition to the advantage of the device for the two types of To be able to use envelope carrier bags, there is here the weather advantage that when using of the pair of press rollers just described to set the fold in spite of the push back of the edge envelope a pre-fold remains on the desired fold line, which the later proper Fold the envelope along a straight fold line and into a close-fitting one Ensures location on the filled pocket.

The invention is explained in more detail in the following description with reference to the drawing, in which

the device according to the invention is connected in its two, which are in line with the seams 16 ',

Equipments is illustrated. Run in the drawing 17 '. For pushing through the handle 15

shows is again in the cover fold 18 a through

F i g. 1 an embodiment of one attached to the inven- plug opening 19.

according to the machine manufacturable embodiment 5 The closing of the in F i g. 6 and 7 of-

in the form of a handle pocket in a front view and in a closed pocket, as in FIG. 8 indicated by

open state, lifting the flap 13, sliding the

F i g. 2 to 4 the handle pocket according to FIG. 1 in handle 15 and the beveled end of the Sei longitudinal section in different phases of the closing front wall 14 under the envelope flap and passage, ίο insert the handle through the

Fig. 5 the closed handle bag according to nungl9.

F i g. 1 to 4 in front view, although for the main inventive idea the

F i g. 6 shows an embodiment of a second device for manufacturing the carrier bags according to the

the machine according to the invention to be produced Fig. 6 to 10 is in the foreground, the device is

Carrying bag in a front view and with the lid open, initially in the equipment for producing the

stand, carrier bags according to the fig. 1 to 5 explained because

7 to 9 show the handle bag according to FIG. 6 in these carrier bags, a forerunner of the carrier bags

Longitudinal section in different phases of the closing before the F i g. 6 to 10 are. The in the F i g. 11 a,

ganges, 11b, 12, 14 and 15 illustrated device manufactures

10 shows the closed handle bag according to ao the carrier bags according to FIGS. 1 to 5 from a

F i g. 6 to 9 in front view, material web B made of thermoplastic plastic film,

F i g. 11 a and 11 b, an embodiment of the ER by a continuously rotating Vorziehrollenpaar indungsgemäßen apparatus f in the equipment 24 from the supply roll 25 in the transport direction α abHerstellung the carrying handle bags by F i g. 1 to 5 in is wrapped. Between the pair of pulling rollers 24 schematic plan view, as ur-5 of the supply roll 25 are known per se, on the

F i g. 12 one for FIG. 11 a associated side drawing, not shown folding tools provided

view, hen that the material web B of the width b constantly

F i g. 13 shows the device part according to FIG. 11 b in the transform into a half-hose H , the upper

Equipment for the production of carrier bags according to position 26 of the width b _{t is} narrower than the lower

Fig. 6 to 10, "30 layer 27, which has an edge part to be turned over-

F i g. 14 shows a longitudinal section along the line and after turning this edge part the

XIV-XIV in FIG. 11 b, width b ₂ , which is greater than the width fc, of the location

F i g. 15 shows a cross section along the line XV-XV 26. The edge fold or hem 28 with the width c

in Fig. 11 b and is by means of the welding device 29 by a

16 shows a cross section along the line 35 weld seam 29 'on the lower layer 27 of the half

XVI-XVI in FIG. 13. Hose H attached. This not only

The handle pocket 1 made of thermoplastic is sufficient that both layers of the later edge envelope

fabric film according to the F i g. 1 to 5, in extension, contribute in the same way to absorbing the tensile forces.

on their side wall 2 an envelope 3, which by means of envelopes, but above all that they in their mutual

place the upper edge of the side wall from two layers 40 term are fixed so that in both layers

gen, and one at the end of the other side slits to be formed always one above the other

wall4 welded form-rigid carrying handle 5, which lie,

is molded from thermoplastic material. The half-tubular web H formed in this way, whose broad

The two side walls 2, 4 and the two layers of lower layer 27 are loaded by the seam 28 in their edge part

of the envelope 3, is already in two layers by the two longitudinal welding 45 is in a transport direction hintei

seams 6 and 7 joined together. The pair of pulling rollers 24 in a manner known per se

Impact 3 is around the fold line 8 by 180 ° over by means of the dancer roller 39 into a von .tsschlaufe 31

the side wall 4 can be folded down. She has placed in the area from which she is driven by the step-wise

the cover fold line a push-through opening 9 for pulling roller pair 32 (Fig. 11b and 14) nunmehi

the handle S. So is moved forward step by step in the transport direction α

Closing the in F i g. 1 and 2 shown of- The semi-tubular web from the pair of pulling rollers 3ί

fenen pocket takes place, as in FIG. 3 represented by given movement steps correspond exactly to de;

Pushing the handle 5 through the width d of the handle pockets 1 to be produced.

Plug-in opening and then, as in FIG. 4 shown, in the transport direction α behind the loop 31 to

by turning the cover over the sides 55 in the area of the seam 28, as shown in FIG. 11 notice

wall 4. ^NEN lets a fixed device 33 for Umschla

The handle pocket 10 according to FIGS. 6 to 10, for example in the form of a helical shape!]

differs from that according to FIGS. I to 5 twisted baffles, provided that the double

by that their flap 13, as the Fi g. 7-ply hem 28 while walking along de

can be seen particularly clearly, even before the folding line 8 by 180 ° to the lower half

use by 180 ° on the associated side wall 12 hose layer 27 and under the upper half hose

folded over and turned over at their side edges by the layer 26, which is addressed by a guardrail 50

Weld seams 16 'and 17' are merged with the side wall 12. For the sharp expression of the Umschlagfah

is bound while the other side wall 14 is on line 8 of the folding tool is a pair of press rollers 4

connected downstream of the upper end having the handle 15. The so folded part e of the hem

has bevels 20, 21 and consequently only up to later forms the Un on the finished carrier bag

about the lower edge 23 of the flap through blow 3. The parts 33, 50, 45 are against the Zeicr

the longitudinal weld seams 16, 17 with the side wall 12 voltage preferably in front of the dancer roller 30 angeorc

net. The folding and pressing of the seam 28 is then carried out continuously by the pulling roller pair 24 advanced hose track.

Behind the folding tool is the processing station 34 for attaching the handles and the Through openings 9th provided. This processing station consists, as shown in FIG. 15, from a stationary abutment 35 for a welding jaw 36 that can be moved up and down in the vertical for welding the carrying handles 5 to the narrower half-tube layer 26 and for a horizontal one Punching knife 37, which can be moved forward and backward, for punching the through opening 9 into the seam 28. The The abutment protrudes from the side between the two half-tube layers 26, 27 and engages with a U-shaped Bend 38 behind the folded seam 28. The end face of the bend 38 forms the Abutment for the punch knife 37. Above the abutment 35 is a magazine 39 for the carrying handles 5 and a slide 40 which can be moved back and forth transversely to the transport direction α of the semi-tubular web provided that each pushes the bottom handle out of the magazine and with its weld-on end promotes under the upper half-tube layer 26 in the area of the welding jaw 36.

The processing station 34 carries out the welding of the carrying handles 5 and the punching of the push-through openings 9 during the stoppages of the semi-tubular web // in Teüufigsäbsiand i from one another, which corresponds exactly to the pulling length of the tubular web determined by the pulling roller pair 32 and thus the desired bag width.

In the transport direction α of the semi-tubular web // Behind the processing station 34, in the area of the seam 28, there is a stationary folding tool 41 in the form a helically wound baffle is provided which engages under the seam 28 and during the transport steps of the hose path folds back 180 ° to its original position, since the Carrying bags according to FIG. 1 to 5 of the edge fold only after filling the carrier bag on the other Bag should be folded down.

Finally, behind the folding tool 41, a cross-welding and cross-cutting station 42 known per se is provided, the welding bar 43 of which can be moved up and down (FIG. 14) is preferably designed as a welding bar and z. B. cooperates with a counter-pressure roller 44 made of elastic material. The distance χ of the cross-welding and cross-cutting device 42 from the processing station 34 is dimensioned so that that generated by it. Separation cut runs exactly in the middle between two adjacent handles. The separating welding bar 43 thus separates in a manner known per se during each standstill a finished handle pocket 1 from the half-hose assembly H , which is the embodiment according to FIG. 1 to 5 corresponds. At the same time, it forms the longitudinal weld seams 6 and 7, which, as described above, connect the two side walls 2, 4 of the handle pocket to one another and the seam 28 forming the flap 3 with the side wall 2 is.

To produce the handle bag 10 according to FIGS. 6 to 9, the device described is modified in that the easily interchangeable attached folding tool 41 is exchanged for a punching tool 46 shown in FIGS. 13 and 16, which, as shown in FIGS. 16 can be seen particularly clearly, with its undercutter 47 reaching under the upper layer 26 of the semi-tubular web H from the side and with an essentially triangular punching knife 48 that can be moved back and forth against the latter, corresponding triangular recesses 49, shown hatched in FIG. 13 punched out in the edge of the upper tubular web layer 26. The distance y of the punching tool 46 from the bcaihciturigsstation 34 is dimensioned such that the recesses are punched out exactly in the middle between two adjacent carrying handles 15.

In this equipment the machine so the seam 28 is not folded back to its original position and the separation section of the Querschweiß- and cross cutting device 42 extends exactly ^fi g 49 through the recesses result, the flap formed by the inverted seam 28 13 by the upper ends 16 ', 17' of the transverse weld seams produced by the separating welding bar 43 laterally connected to the side wall 12 of the handle pocket 10, while the lower part 16, 17 of the transverse weld seams forms the longitudinal weld seams of the carrier bag. The upper end of the other side wall having the handle 15 remains free as a result of the bevels 20, 21 produced by the recesses 49.

1 sheet of drawings

30 "6? 0

Claims (5)

Patent claims: 1. Device for the production of plastic handle bags with a dimensionally stable handle welded to the upper edge of one of the bag walls, an edge envelope of the other pocket wall and a slot for the bag handle provided in the fold line between this pocket wall and the edge envelope, with devices for moving a plastic film forward step by step - Semi-tubular web with a wider and a narrower layer, to form the through-slots in the wider web layer, welding the handles on the shorter web layer. Folding the edge of the wider layer under the narrower layer and for forming and separating the individual pockets by means of separating welds transversely to the longitudinal direction of the web, characterized in that the devices for punching out the push-through slots (9, 19) and for welding the support girders (5, 15) in a station (34) and the device (33) for turning over the edge (28) of the wider layer (27) are downstream, the tool (37) for punching out the push-through slots can be moved back and forth parallel to the half-tube plane, and that between the Punching and welding station (34) and the transverse three-way welding station (42) a station (46) for punching out recesses (49) on the edge of the narrower shark hose layer (26), which are located in the middle between successive handles over the entire width (e) of the envelope ( 3) extending the other half-tube layer (27) is provided. 2. Apparatus according to claim 1, characterized in that the device (33) for turning over of the envelope (3) under the narrower half-tube layer (26) another edge envelope and welding station is connected upstream, whereby the welding of the first turned over Edge (28) takes place below the later fold line (8) of the second, double-layer envelope (3). 3. Device according to claim! or2, there you characterized in that the station (34) for punching out the through slots (9,19) and for welding on the carrying handles (5, 15) a U-shaped, between the two hose web layers (26, 27) and behind the folded edge (28) engaging abutment (35) for the welding bar (36) which can be moved up and down for welding the carrying handles to the narrower hose sheet layer (26) and for the horizontally forward and retractable punch knives (37) for punching the through slots in the edge of the having wider tubular web layer. 4. Device according to one of claims 1 to 3, characterized by the arrangement of a Press roller pair (45) for the edge seam folding line (8) behind the device (33) for turning over the edge envelope (3) under the narrower half-tube layer (26). 5. Device according to one of claims 1 to 4, characterized in that df.ü the station (46) exchangeable for punching out the edge recesses (4?) Of the narrower half-tube layer (26) and can be replaced by a folding tool (41) which folds back the envelope (3) by 180 °.