DE2445227C2 - Pack, especially cuboid cigarette pack - Google Patents

Description

Advantageous further developments of the crfindungsgcmä-Dcη The package and a preferred device / to produce the same are detailed in the subclaims described, with the aid of a support plate in the manufacture of the invention Pack, especially at the pressures applied, damage to the pack contents safe is avoided.

The following are exemplary embodiments of the invention explained in more detail with reference to the drawings. It shows

F i g. 1 a blank for the production of a pack for the inclusion of cigarettes or the like. when spread out,

Fig.2 shows a cross section through a conventional one Composite film,

F i g. 3 shows the upper part of a pack made from a blank according to FIG. 1 in an intermediate position in perspective Depiction,

4 shows a further intermediate position of the part of Packing according to FIG. 3,

F i g. 5 shows a representation corresponding to FIG. 3 and 4 another intermediate position on the opposite side Closing flaps,

F i g. 6 a fully folded pack in a perspective view,

F i g. 7 shows an intermediate position before the final folding according to FIG. 6 in side view with support plate,

F i g. 8 shows a representation corresponding to FIG. 5 an alternative folding of the pack according to FIG. 3 to 7.

The in F i g. 1 is used to produce a cuboid pack, in particular for cigarettes. The blank is divided into individual fields by pre-stamped line-shaped markings, which are used for Formation of a front wall 10, a rear wall 11 and of side walls 12 and 13 are used. The aforementioned walls 10 adjoining one another in a row ... 13 form a central blank strip 14. This is followed by lateral edge strips 15 and 16, which serve to form closing flaps on the front of the package.

In the present example, the closing flaps are made in the area of the front wall 13 and the rear wall 11 adjoining longitudinal end tabs 17 and 18 of the same width and in the area of the side walls 12 and 13 resulting Seitenendlappcn 19 and 20. The side flaps 19 and 20 are with the intermediate, connected in the finished pack outer longitudinal end tabs 17, while the side end tabs 19 and the in the finished pack, internal longitudinal end flaps 18 are separated from one another by a separating cut 21 are.

The side flaps 19 and 20 are provided with pre-embossed diagonal fold lines 22 and 23 that cross one another provided, while the inner longitudinal end flap 18 has a central fold line 24 running over the entire length.

To form a tubular intermediate folded position the piacking is on the side wall in the present file 13, a hose flap 25 is connected, which in said intermediate position with the inside of the Rear wall 11 is connected.

The cut according to Fi g. I consists of one special built-up film, namely a so-called composite film. Composite films usually consist of several Layers using plastic bearings A typical one The structure of such a composite film is such that the two outer layers are made of plastic, in particular Polyethylene. In between an aluminum foil and a paper cover are provided. These are in turn connected to one another by a (middle) plastic, in particular polyethylene, layer.

The present, in F i g. 2 composite film shown in schematic section is designed so that the inner layer, namely the inwardly facing side of the blank in the pack, by a plastic layer 26 with a relatively low melting point, z. B. made of polyethylene with a melting point of about 100 ° - 110 ⁰ C, is formed. At least one outer layer 27 consists of a coating with a relatively higher melting temperature, e.g. B. from a lacquered cellulose film or from a layer of lacquer In

The more commercially available, more sealable ones come into consideration Paint with a melting temperature of 180-200 ° C. Otherwise, the structure of the composite film can be compared to the conventional one Corresponding structure, namely with an inwardly facing aluminum foil 28, a paper layer 29 and arranged in between ·· adhesive layer 30 made of polyethylene or some other suitable connecting means.

The cut according to FIG. 1 can, however, alternatively be constructed in such a way that the central strip 14 has a different layer structure than the edge strips 15 and 16. The structure can preferably be chosen in this way be that the central strip 14 has a conventional, known construction of a composite film, while In the area of the edge strips 15 and 16, the outer layers 27, 29 and 30 are missing, so that here only the aluminum foil provided with a plastic layer remains on the inside.

Such films can be produced continuously in continuous webs, namely with continuous webs Central strips 14 and marginal strips 15 and 16.

From such a film or a blank according to FIG. 1, a pack according to FIG. 3 to 8 can be produced.
First of all, the blank is wrapped around the contents of the pack, namely a cigarette block, in the form of a tube, with the tube flap 25 provided, for example, with a hotmelt being connected to the inside of the rear wall U. At the two front ends of the pack, the front tabs 17.

In the exemplary embodiment of FIGS. 3 to 7, To produce the front closures of the package, first place the inner longitudinal end flap 8 around the

so the center fold line 24 is folded in such a way that the side of this longitudinal end flap 18 that originally points inward with the half 18a facing the free edge to the outside or - after folding over the longitudinal end flap 18 against the contents of the package - facing up.

The opposite side end lobes 18 free from the longitudinal end lobes 19 and 20 are folded outwardly about the diagonal fold line 22 such that triangular flaps 31 and 32 are in the intermediate position according to FIG. 4 with the originally inner sides facing outwards.

Then the double-layered, triangular-shaped side end flaps 19 and 20 folded inwardly around the diagonal folds 23, in such a way that the originally inner Sides of the triangular flaps 31 and 32 are folded onto one another. Thereby the triangular marriages 31 and 32 folded in such a way that the original side end flaps are stacked for four days are. It is important, however, that the triangular

tabs 31 and 32 are folded onto one another to form triangular inner surfaces 31a, 316 and 32a, 32b, respectively. These inner surfaces lying against one another and welded to one another have the meltable coating.

The folding explained above runs simultaneously or synchronously with the folding over of the outer longitudinal end flap 17 against the package contents and the folding in of the double-layer inner longitudinal end flap 18. This is accordingly in the embodiment of FIGS. 3 to 7 laterally between the folding flaps 19 and 20 or the inner surfaces 31a, 31b : 32a, 32b.

The closed end face of the package is now subjected to heat and pressure, e.g. by is an externally attached heated stamp (not shown). By plasticizing those facing each other

Pages Apt IJlngspnriianpen 17 and 18 h / w. Her HHlflp

18a of the Längendlappcns 18 with the inside of the A tight seal is created between the longitudinal end flaps 17 and the side flaps. Due to the special Folding is ensured that both in the area of the long-end lobes 17 and 18 as well as in the area of Side end tabs 19 and 20 which originally point inward, with a slightly melting coating provided areas come to rest against each other. This enables a completely tight seal to be established without plasticizing the outer layers of the composite film which react at higher temperatures will. The outer side of the outer longitudinal end flap 17 facing the welding tool is shown in FIG described manner designed so that a plasticizing at the given welding temperature outer Coating is not given.

The alternative according to FIG. 8 differs in j; the geometry of the folds is only insignificant from the preceding described exemplary embodiment. Only the folding sequence is different in that after the intermediate folding position according to FIG Package contents are folded. Then the double-layer, triangular-shaped side end flaps 19 and 20 together with the outer longitudinal end tab 17 against the end face of the package contents or against the after The upturned half 18a of the inner longitudinal flap 18 is folded over. The aforementioned one is used for welding Half 18a of the longitudinal end tab 18 is thus in the end regions on the side end tabs 19 and 20 remaining connected to the covering half of the inside of the outer longitudinal end lobe 17. so

To help in the manufacture of the fastener by applying A support plate 33 can be placed in the Fold are introduced, namely in the folded inner longitudinal end flap 18. The support plate 33 is located therefore only on surfaces with coatings with a higher melting point or without a plasticizable coating, z. B. directly on the aluminum foil. This support plate 33 absorbs the contact pressure in such a way that the parts to be connected, namely the upper half of the longitudinal end lobe 18 and the this lying half of the Längendlappcns 17 as well as the areas of the side end tabs to be connected to one another 19 and 20 extend between the Slützplatte 33 and the press ram to be applied outside. The support plate 33 is expediently provided with an elevation 34 to allow for different numbers to compensate for height differences resulting from layers. In the present exemplary embodiment accordingly, the elevation 34 is trapezoidal outside the area of the folded-in side end tabs 19 and 20 provided.

Here / u 4 sheets of drawings

Claims (6)

1 2 The invention relates to a pack, in particular claims: cuboid cigarette pack, made of a composite film, according to the preamble of claim 1, so- 1. Pack, in particular cuboid cigarette like a device for producing such a pack.from a composite film, which is attached to the front 5 packs. th formed, each only on the inside with a thermal The use of so-called composite foils is Mixable weldable plastic layer provided for the production of packaging, including cigarette end flaps through thermal welding with packings, basically already known. The advantage which are connected in such a way that the weldable of this composite film is that due to the outer surfaces the respective inner end tabs to the outside; outer layers made of plastic, in particular polyethylene, folded and with the internal welding surfaces for the aroma-tight sealing of the packs, none thermally separated adhesive is used for the respective outer end tabs, but the foils or are welded, characterized by the overlapping closure flaps that the inner longitudinal end tabs (18) are connected to one another by the adjacent thermal welds hard side end tabs (19, 20) by a separating 15 can. incision (21) is separated, while the outer longitudinal In practice, however, certain pro-end lobes have become (17) with the adjacent sides of the side walls. Due to the structure of the composite film is ienendlappen (19,20) remains connected. it cannot be avoided that the externally attached 2. Pack according to claim 1, characterized in that welding tools through the plasticizing Kunststoffnet that areas of the side end tabs (19, 20), in particular accept 20 plastic residues. Even the special feature of the inner longitudinal end flap (18) in the use of welding tools with Teflon (in the initial position adjacent triangular tabs (31, same trademark) coating cannot prevent this appearance when folded outwards in an intermediate fold. This makes it possible, for example, that the double-sided in the intermediate folded position, the welding of the closing flaps etc. pell-ply side end flaps (19, 20) by folding in 25 during the transport of the pack relative to the face of the pack abutting each other. triangular surfaces (31 a, 31 b \ 32 «. 32b) are to be carried out with one welding tool attached to the packing. But also with an intermittent or pulpable plastic layer (26). With the welding jaws pressed on, these are 3. Pack according to claim 1 or 2. characterized by plastic residues, if this does not indicate that the inner longitudinal end tab (18) 30 welding jaws have cooled down in the meantime. For the formation of a corresponding fold line (24) avoid this problem, the skilled man of the etwamittiggefaltetist.se daßeir.'nachobenweisende US-PS 21 96 666 could remove the excitation, a VerHälfte (Ma) is formed which 10 folded inner longitudinal bundfolic to choose, a thermally weldable plastic layer is placed on the pack or the contents of the pack only on its inner end tabs (18) directly against the end face of the page and the 35 points to the front end tabs so by thermal side end tabs (19, 20) in cingefaltctem condition See weld to connect with each other that each of them form a weldable plastic layer (26) on the inner end tabs, which are folded outwards, on the with weldable welding surfaces, the half surfaces of the respective outer end tabs with the inner welding plastic layer (26) facing upwards thermally connected (18ajdes inner longitudinal end flap (18) and * o welds them nd. However, since all of the end tabs are welded into one with them. closed ring or hose are connected is 4. Pack according to claim 1 or 2, characterized in that a complete frontal closure in a single that the inner longitudinal end flap (18) is not possible due to the welding or sealing process. Entunter it Formation of a corresponding fold line (24) are in fact when welding which is vertically folded outwards so that one pointing upwards 45 folded welding surfaces of the respective inner half (18a,) is created, and that lateral edge areas end tabs with the inner welding surfaces of the of the inner and outer end tabs that are folded around the center fold line (24) Longitudinal end lobe (18) between parts of the folded triangular fins protruding from the two narrow sides, th side end tabs (19, 20), in particular between the folded and folded in a separate operation against the triangular surfaces (31a, 31i>; 32a, 32b,) 50 arranged end faces folded and connected to them whose weldable plastic layers (26) must be. are connected. The present invention is therefore the object 5. Device for the production of packs according to the basis to develop the known pack so that One of Claims 1 to 4 with one in the area of the plastic end faces which can be welded in spite of the internal weldable of the packs to the folded end-flap layer to form the complete end-face Verpen attachable welding tool, only a single welding or sealing pre-marked conclusion a support plate that can be inserted into the forehead fold is necessary. (33) that are not facing between each other. This problem is solved by the fact that the inner weldable surfaces is introduced, in particular- longitudinal end tabs from the adjacent side end tabs between the two layers of the middle fold libo pen is separated by a severing cut, while never (24) folded inner longitudinal end lobe (18). the outer longitudinal end lobe with the adjacent lateral 6. Apparatus according to claim 5, characterized in that the side end tabs remain connected.
Characterized that the support plate (33) with elevations (34) Through this structural development of the known to compensate for height differences through the lower packing, the formation of laterally protruding number of overlapping fins is provided when welding the end faces. Avoid end-flaps, with the result that a complete surgic seal can be achieved in a single sweat seal. or the sealing process is crhallich.