DE1270786B - Process for the production of carrier bags from thermoplastic with welded handles - Google Patents

Description

Process for the production of carrier bags made of thermoplastic material with welded handles The invention relates to a method of manufacturing of carrier bags made of thermoplastic with welded handles. The invention is based on the object for the production of such carrier bags to create a fully automated production process with a handle, d. H. a process that allows the bag to be produced at the same time to attach the handles to the previously common manual production method such carrier bags, in which a pair of handles by hand in time-consuming work inserted into the open end of a finished pocket and then welded on was to replace.

In a known embodiment of a thermoplastic carrier bag Plastic with welded handles (German utility model 1 802 821) are two disc-shaped handles made of plastic, each with a flexible insert Made of cardboard, plastic or the like. Provided that at its lower edge over this have downwardly protruding strips made of weldable plastic, which with the are welded at the top of the bag. Form the handles with their inlays prefabricated parts that are subsequently attached to the previously completed container and must be welded on individually.

A fully automated production of the carrier bag together with the handles is neither possible nor intended.

In the production of carrier bags made of paper (USA.Patent No. 2 062 617) it is known to put on the inside of a Paper web at a distance from each other two with their handle parts in the take-off direction Glue pointing handles after the paper web in the area of the handles each has been provided with a cross-section. The one on one of its edges with Adhesive applied web then becomes a continuous tube folded and glued in such a way that the two handles come to rest on top of each other and are located on one hose wall each. Subsequently, in the middle area interrupted cross cuts are made through the web, which are based on the previously im Connect the cross cuts made in the area of the carrying handles.

As a result, individual pieces of tubing are over their upper separating edge protruding handles formed, which then at its lower part with a Ground must be provided. Finally, the top edge is done a little earlier fold line made in the web inwardly around the top edge of the bag to reinforce. This is familiar procedure is time-consuming and complicated, above all but it can only be used in the manufacture of carrier bags made of paper use, but not with carrier bags made of thermoplastic material, what to the differences in the material and the resulting differences the processing is due.

From the production of bags made of plastic, that is of containers that do not have carrying handles, it is known to have a double-lying To move the plastic film web intermittently and during the standstill phases Sections, preferably separating welds, transversely to the longitudinal direction of the web at a distance the desired tool width - (US Pat. No. 2,347,439).

In such a production of bags made of plastic it is also already known (Belgian patent 570 672), an opening tape between to bring in the edges of the double-lying plastic film web through the separating welds to separate with and at the same time to tack in the edge welds, while the actual welding of the tape to the bag walls afterwards, so after The separation welds are carried out on -the-individual bags. That means a processing operation on the finished product; therefore there is this known method there is no indication of a fully automated production of finished carrier bags welded handles, for solving the problem set at the beginning now the process provided according to the invention for the production of carrier bags made of thermoplastic with welded handles characterized in that in a manner known per se, a double-layered plastic film web intermittently emotional and during the standstill phases, cuts, preferably cut-off welds, transversely to the longitudinal direction of the web, made at the distance of the desired workpiece width be that the two layers before making the separating cuts on one of their long side edges are at least temporarily performed at a perpendicular distance from each other and that a pair of carrying handles between the two layers during the standstill phases the as yet unseparated film web is inserted and, by means of it, between the layers introduced connecting strips is welded to the layers of the film web. By the invention is thus created a method that is much simpler than previously known methods and fully automated with relatively little effort is feasible.

Appropriate steps are taken when carrying out the process according to the invention from a rolled-up, simple sheet that can be folded up to form the two-ply Web is formed, expediently with the formation of a fold on one longitudinal side edge. This has the advantage that the web when making printed bags should only need to be printed on from one side, which is what the use of a simple printing press allows. After printing, the web can then be easily removed Place in the required shape. The two-layer web is expediently moved in a horizontal plane.

The invention also comprises an apparatus for carrying out the method, which is essentially a feeder device with a stack of pairs of handles Containing magazine comprises, from each of which a pair of carrying handles by means of a slide can be removed and inserted between the edges of the layers of the web, furthermore a Handle welding device as well as a cross cutting welding device. The slider appropriately has a recess for receiving a pair of carrying handles on.

The introduction and welding provided according to the invention, respectively one z. B. by a hole-pin connection od. Like. Secured against unintentional loosening Carrying handle pair has the advantage that the carrying bag after completion in a flat Condition and remains closed with exactly aligned handles and also later, so after use, by means of the carrying handles in the flat state and. again without delay lets close.

An embodiment of the subject matter of the invention is in Drawing shown, it shows F i g. 1 the stages of manufacture of the carrier bag, FIG. 2 shows the finished carrier bag folded flat, FIG. 3 shows a section along line E-E of Figures 1 and F i g. 4 the carrying bag when it is full or whole wound up state.

In the example shown, the two are the side walls of the finished carrier bag forming layers 2, 3 of the web on one of its long sides an inserted fold 4 connected to one another. The web 1 is in a horizontal Level moved intermittently in the direction of arrow 5. Layers 2, 3 are on their free long side edge guided at a vertical distance from each other (see Fig. 3).

During the standstill of the web, a pair of carrying handles 6 from in relation on the pocket material much stronger material partly between the two Layers pushed and by means of its connecting pieces lying between the layers 7 welded to layers 2 and 3. The carrying handles expediently have a continuous one same strength. After one or more further clock steps, it is transverse to the longitudinal direction the web 1 and in the middle between two pairs of carrying handles 6 a separating weld 21 is carried out. A carrier bag 8 is separated from the web 1 by the separating weld, the layers 2 and 3 with each other and in the area of the fold 4 at the separating edge can also be welded to this at the same time. The seen in the direction of transport The front weld seam 21 'of the carrier bag is already in the previous welding process and severing the adjacent pocket. A finished carrier bag is shown in FIG. The length of the connecting pieces 7 of the pairs of handles 6 is sized so that these pieces of the two superimposed walls of the finished Carrying bag 8 protrudes on both sides by a piece corresponding to the depth t of the fold 4 will. This results in a good three-dimensional shape of the filled or fully opened Carrying bag as shown in FIG. 4 is shown. Form when opening the bag the known triangular pockets 9 at the lower ends of the narrow, the longitudinal welds having side walls.

The pairs of handles consisting of the handles 10, 11 (FIG. 4) 6 are fed individually to the material web 1 by a feeder device.

The carrying handles 10, 11 are connected to one another, for example by means of a hole-and-pin connection securely connected to prevent unintentional loosening and keep the bag closed.

The feeder device for the pairs of handles 6 can, for example from a magazine 12, to which the pairs of handles are fed in stacks, and one Slide 3 exist, which is displaceable in the direction of the double arrow 14. Of the for example, pneumatically actuated slide 13 has on its track 1 facing end a recess 15, the depth of which is a maximum of the strength of a pair of handles 6 corresponds. If the slide 3 is moved into its rear limit position, it lays the lower pair of carrying handles 6 of the stack loaded by a weight 16 into the Recess 15 (see Fig. 1). When the slide 13 moves forward in its front In the limit position, the pair of handles is then taken along (see Fig. 3) and the connecting pieces7 step between the two layers 2 and 3. The stack contained in the magazine 12 rests also during the movement of the slider 13 on this one.

- Since only the handle portion of the pair of carrying handles 6 in the recess 15 of the slide 13 is, for safe guidance of the pair of handles is a fixed Rail 17 is provided, which can be made of self-resilient material or on can still carry a leaf spring at its free end.

The welding of the carrying handles 10 and 11 of a carrying handle pair 6 happens at the same time by means of a welding device. As any welding equipment can be selected are shown in FIG. 3 only schematically two welding jaws 18, 19 have been indicated, which can be displaced in the direction of the double arrows 20. Even A cut-off welding device can be used to produce the cut-off weld Find.

Claims (5)

Claims: 1. Method for producing carrier bags from thermoplastic with welded handles, thereby marked e i c h n e t that in a known manner a double-lying plastic film web moved intermittently and cuts, preferably during the standstill phases Separation welds, transverse to the longitudinal direction of the web at a distance of the desired workpiece width be made that the two layers (2, 3) before making the separating cuts (21) at one of its long side edges at least temporarily at a perpendicular distance from one another be guided and that during the standstill phases a pair of carrying handles (6) inserted between the two layers (2, 3) of the as yet unseparated film web (1) and by means of its connecting strips (7) inserted between the layers with the Layers of the film web is welded. 2. The method according to claim, characterized in that the material web (1) from a rolled-up single sheet by folding it into a two-layered sheet Web is formed, expediently with the formation of a fold on one longitudinal side edge. 3. The method according to claim 1 or 2, characterized in that the movement of the two-layer web (1) takes place in a horizontal plane. 4. Device for performing the method according to one of the preceding Claims, characterized by a feeder device with a stack of magazine (12) containing pairs of handles, from which by means of a slide (13) each a pair of handles can be removed and between the edges of the layers (2,3) of the Web (1) is insertable, a handle welding device and a transverse separation welding device. 5. Apparatus according to claim 4, characterized in that the slide (13) has a recess (15) for receiving a pair of carrying handles (6). Considered publications: German utility model no. 1,673,783,1802821; Swiss Patent No. 161 620; French patent specification No. 1,296,741; Belgian Patent No. 570,672; British Patent No. 815,448; U.S. Patent No. 2062617.