DE2746126A1 - Sack filling and sealing system - uses sacks forming sections of hose of sheet material with cut-out portions for orientation (NL 18.4.78) - Google Patents

Abstract

The filling system operates on sacks and bags open at least partly at the top, after which they are closed by welding on sealing. The sack or bag is part of a length of hose of sheet material, with folded flaps and first sealed or welded seams forming the base. Near the first seam-running in the transverse direction-each sack has a cut-out portion so shaped, that when the hose is passed round a tight curve the lower edge of this portion is moved away from the remainder of the hose sheet material. There can be a weakened portion of the sack wall near the cut-out portion, pref. in the form of a perforation.

Description

Method and device for filling bags or

Sacks The invention relates to a method for filling bags or sacks by feeding the contents to a bag or sack, which is attached to his The top is at least partially open, after which the filled bag or

Sack is closed by sealing or welding.

This method of filling bags or sacks is common known and used. However, the known method entails that the Top of the loose bags opened for a filling operation and then closed must become. In particular, the handling of separate or individual bags or sacks leads to a lot of work and can lead to many difficulties.

The invention is based on the object of a method and a device to create its implementation, with the help of which bags or sacks are based of a film structure or tape, the interconnected bag or contains sacks, can be filled, so that the eland habitation separate or individual bags or sacks can be omitted during the filling operation, while, moreover, the filling of the bags or sacks did not cause any difficulties leads.

This object is achieved according to the invention in that the bag or sack is part of a tubular film structure, folding and folding having transverse first sealing or weld seams, each of the bottom of a Form bags or sacks, and that the film bag or sack at least one Incision near a transverse first seal or

Has weld seam such that the lower edge of the incision at Guide the film structure along a small radius of curvature of the tubular Slide is moved away.

It follows that filling nozzles can be easily and simply inserted into the bag or Sack can be inserted during a tear seal or weld and a separation from the film structure after the filling operation is very expedient Way can be run.

t.ur improving the separation of the bags or sacks from the film structure the bag can have perforations in a suitable manner next to the incision.

The separation can also be carried out with the help of cutting devices, the filled bag or bead from the film structure before or after the final Sealing of the top of the bags or bags by means of an abrasive seal or heat seal. Separate the sacks.

In an advantageous manner, the method can be carried out so that from a structure made of plastic bags or

Sacks make use of folds along their long sides each side has a central longitudinal fold edge and two outer gusseted edges that have a first and a second tuck fold part with a first transverse sealing or Limit weld, which is at least in the area between the central Longitudinal tuck fold edges and two first tuck fold part welding or sealing seams extends on each side, each tuck fold portion being sealed or welded always connects an outer film layer with an opposite folded fold part and a first transverse seal or seal

Weld seam closes the bag or sack, regardless of whether in cooperation with the first tuck fold part sealing or welding seams or not and in close to the incision that runs along a foil wall and at least along it of the adjacent inwardly directed tuck fold portions, wherein at least two second fold-in seals resp.

- Weld seams are provided, each of which has an outer film layer part connect to an opposing tuck fold part, the first and the second tuck seal seams toward the central one Longitudinal fold edges and each in the direction of the nearest first transverse Seal or weld seam extend, while the first fold part seal or weld seams essentially the first transverse sealing or weld seam cross in the area in which the first transverse sealing or welding seam crosses the central longitudinal fold edge.

The advantage of such a bag or sack is that the Bag or sack can be easily filled by forming a large filling opening, which is determined or limited by those ends of the incision that are strongest are arranged facing inwards.

On the other hand, the invention also relates to a device for Filling bags or sacks with a filling nozzle for introducing the filling material with Iisseal or. ICE welding organs for heat sealing or wear welding a bag or sack after the filling operation and preferably with a bag or sack Bag retaining organs, in which device according to the invention is then provided a guide for a tubular film structure, with a small one Radius of curvature in the heat-sealing or heat-welding organs around the filling opening in such a way that as a result of the leadership of the tubular film structure along the small Radius of curvature in this case an incision in the bag or sack in the direction of the Outside is formed so that a filling device can be introduced.

The device has two organs to hold on to of the bag or sack, which is preferably in the edge area of the bag or sack are able to work, whereby this 3bag or sack is one with fold-in parts is that of two outer tucked fold edges and one inner tucked fold edge are limited.

In the following the invention with reference to a in the drawing illustrated embodiment further described in detail; in the The drawings show: FIG. 1 schematically a device according to the invention and FIG 2 a bag or sack structure, as used in the device according to the invention finds.

Figure 1 shows a device for filling plastic bags or Sacks and for the subsequent iieisssiegel or heat welding of the same.

The device has a coil 1 on which a tubular Foil structure or a corresponding web 2 is arranged as shown in FIG is de in turn via the first transverse seal or

Weld seams 3 has, which the bottom of the finished bag or sacks form. The term "sealed or welded seams" is used here to refer to "sealed or welded seams". Understood heat welds.

Each bag 31 has a transverse incision 4 with a upper edge and a lower edge 6 for filling a bag 31.

The transverse incision 4 in the tubular film front wall 2a of the tubular film structure 2 extends at least into the adjacent first folding fold parts 13 and 13a up to the central longitudinal folding fold edges 14, 14a.

The incision 4 expediently further extends along the adjoining second folding fold parts 13b and 13c up to the am next lying outer longitudinal fold edge 18 and 20. The two outer Longitudinal fold edges 17 and 19 are of course also cut through. The tubular film rear wall 2b preferably has perforations 15.

The bag or sack web 2 is from the spool 1 over guide rollers 7 and then a guide 8 guided with a small radius of curvature. Below a receptacle 9 is arranged on the guide 8 with the small radius of curvature the filled bag or sack can be put down.

As a result of the guide 8 with the small radius of curvature moves lower edge 6 of the A cut 4 from the rear wall 2b of the bag 31 so that an opening 10 is created into which a filling nozzle 11 moves downwards can be.

After filling, the heat-sealing elements 12b and the heat-sealing abutments move 12a towards each other so that a sealed or weld seam 21 in the Bag 31 is formed.

If no perforations 15 are provided, the bag or Sack 31 from the tubular film structure 2 after filling by means of a cutting element 16 can be cut off.

The film structure 2 advantageously has two first ones Tuck-in fold seals or welds 22, 23, 24 and 25, each always an outer one Film layer of the tubular film structure 2 with the opposite fold associate; at the same time are at the other end of the bag or sack 31 to both Sides of the same also have at least two second fold-in seams or welded seams 26, 27, 28 and 29 provided, which have an outer film layer part with the Gogenüberlying Connect folding fold part and at least from the outer edges of the folding folds 17, 18, 19 and 20 in the direction of the adjacent central longitudinal folding fold edges 14, 14a extend towards. The first and second tuck-in fold seals and -welds run at an acute angle to the outer longitudinal edges, namely starting from a point on the outer longitudinal fold edges 17, 18, 19, 20 in the direction of the closest end of the bag, for example under one Angle of 450.

The first transverse sealing or weld seam 3 is more expedient Way carried out over the entire width of the tubular film structure 2.

In this way a very good seal or seal can be achieved.

Welding in a suitable manner on the bag described above or bag 31 can be reached.

After filling is a bag or sack with a second transverse Sealed or welded seam or final seam 21 given, which extends over the entire broad the bag 31 extends, with four film layers in that edge region of the bag or sacks 31 where the folds are present are heat-sealed together or are hot-welded. In a preferred embodiment, the structure has 2 via third tuck fold part sealing or welding seams 30a, 30b and 31a, 31b. Each of these seams connects one outer foil part with the opposite one Folding fold part. This facilitates the filling of the bag or sack 31, since the filling opening 10 so through the intersections of the second folding fold part seal or. welds 26, 27 and the third tuck fold part seal or welds 30a, 30b and the seams 28, 29 and 31a, 31b is limited or determined.

The third seams 30a, 30b and 31a, 31b further facilitate this Closing the bag or sack 31 by means of the heat-sealing or Iieiss-weld seam 21, since only two third layers are connected at the same time as the two outer layers of film are connected Seams 30a, 30b and 31a, 31b must be joined together.

In some cases it is preferable to have all four layers in the folds to be connected to one another by means of a single seam 30 'and 31'.

In the case of the filled, closed bag 31, the first folding fold seals meet or weld seams 22, 23, 24, 25 and the second fold-in fold seal or

-welds 26, 27, 28, 29 on the closest transverse ones Seal or weld seams at the crossing points of a transverse seal or weld seam with a central long fold edge 14, 14a, which is the fold part seal or weld seam is closest.

Thus, a filled bag or sack 31 is then created, which over has a block-shaped floor on each side. If there is an incision 4 and perforations 15 at the film structure 2 are provided, the filled bag or sack 31 has smooth End parts, one part of which has been broken open between two perforations Parts is rough or uneven.

Claims (11)

Patent claims 1. Method for filling bags or beads by feeding the filling material to a bag or sack, which is at its top is at least partially open, after which the filled bag or sack by sealing or welding is closed, characterized in that the bag or Sack is part of a tubular film structure that is folded and transverse has first sealed or welded seams, each of which is the bottom of a bag or sack form, and that the film bag or sack at least one incision in the vicinity has a transverse first seal or weld seam such that the lower edge of the incision when guiding the film structure along a small one Radius of curvature is moved away from the tubular film. 2. The method according to claim 1, characterized in that the bag or sack structure in the vicinity of the incision a weakened wall section, preferably an XJandabschnitt with a perforation. 3. The method according to claim 1 or 2, characterized in that of a structure of plastic bags or sacks is made use of, the along its long sides have folds, with each side having a central one Has a long-fold fold edge and two outer long-fold fold edges that first and second tuck fold portions with a first transverse Seal or. Limit the weld seam, which is at least in the area between the central longitudinal tuck fold edges and two first tuck fold part welded or. -siegelaten extends on each side, each fold part seal or -weld seam always an outer film layer with an opposing folded fold part connects and a first transverse seal or weld seam the bag or Sack closes, irrespective of whether in cooperation with the first folding fold part seal or. welds or not and in the Xihe of the incision that runs along a Foil wall and at least along the adjacent, inwardly directed Einsdilagfold parts / extends, with at least two second tuck-fold seals or welds are provided that each have an outer film layer part with an opposite one Connect tuck fold part, wherein the first and the second tuck fold seal- or seams in the direction of the central longitudinal folded fold edges and depending in the direction of the nearest first transverse seal or. Weld extend while the first tuck fold part sealing or welding seams in the essentially the first transverse seal or. Weld seam in that area cross, in which the first transverse sealing or weld seam the central Longitudinal fold edge crosses, with the second fold seal preferably or weld seams with third tuck-in fold seal or weld seams in connection standing between the outer and +) and on both sides of the structure the central longitudinal folding fold edges extend. 4. The method according to claim 1 to 3, characterized in that the incision extends through the first and second tuck fold portions. 5. The method according to claim 3, characterized in that the first transverse sealing or weld seams are designed so that they extend over the entire width of the pouch or sack, with four layers of film in the edge areas to form a heat-sealed or heat-welded seam with one another associate. 6. Device for filling bags brç. Sacks with a filling nozzle for feeding the filling material, with heat sealing or hot sealing, 7issing organs for hot sealing or heat sealing a bag after the filling operation and preferably zait bag or Bag retaining members, characterized by a guide (8) for a tubular film structure (2), with a small radius of curvature in the vicinity of the heat seal or heat welding element (12a, b) and the filling opening (10) such that as a result of the guide (8) of the tubular film structure (2) along of the small arching radius an incision (31) (4) in the bag or sack / is formed in the direction of the outside, so that a filling device (11) is insertable. 7. Apparatus according to claim 6, characterized in that the retaining members to work at least in the edge areas of the tubular film structure (2) are able to. 8. Apparatus according to claim 6 or 7, characterized in that the heat seals or heat welding elements (12a, b) over the entire width of the film structure (2) are able to work. 9. Apparatus according to claim 6 or 7, characterized in that the heat sealing or heat welding members (12a, b) over the entire width of the structure (2) in the area between the central longitudinal folding fold edges (14, 14a) a folded-up bag or sack (31) can be put into action. 10. Bag or sack filled by the method according to claim 1. 11. Bag or sack according to claim 10, characterized in that the bag or sack (31) has a free end that is partially smooth and partially is embossed or roughened as a result of the foil material broken between perforations.