DE2522903A1 - DEVICE FOR FOLDING A CONTINUOUS STRIP OF PACKAGING MATERIAL IN THE LONGITUDINAL DIRECTION IN AT LEAST THREE OVERLAYING PARTS - Google Patents

Description

"" ~ Case No. 117

May 22, 1975 gu / gm

G. D Societa per Azioni Bologna / Italian

DEVICE FOR FOLDING A CONTINUOUS PACKAGING MATERIAL TAPE IN THE LONGITUDINAL DIRECTION IN AT LEAST THREE OVERHEAD PARTS ..

The present invention relates "to packaging machines for confectionery and the like, and relates in particular to a device which is attached to the devices for the feed of the packaging material can be grown in such machines, and which a continuous packaging material band in the longitudinal direction in at least three rows one behind the other Parts folds.

For the packaging of parallel flat confectionery articles. Conventionally, two impacts are provided: an inner and an outer impact, with the corresponding

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Packaging materials loaded one on top of the other and simultaneously folded around the product by the packaging elements will.

The inner fold, which is formed from sections of the same or smaller width than that of the product, envelops: tubular ^: four of the six product surfaces.

The outer impact is fed in the form of sections, which are almost the same length, but wider than the inside fold, and in the finished pack it also covers both of the above-mentioned four surfaces from the inner wrap exposed side surfaces of the product. Both of these sections are usually followed by a

a single cutting process separated from tapes coming from different reels. A second pair of coils is used usually as a reserve.

It is also another type of packaging for such Products known, which differs from the previous one in that between the outer fold and A picture is provided for the product (for example to collect or advertise) instead of the simple inside wrap is.

To get between the outer shell and the product relative To be able to introduce large images become the same

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folded around the product analogous to the inner sleeve, as said above, after being obtained from a tape previously folded lengthways.

In this case, according to the conventional technique, a single Tape reel used (a second reel serves as a reserve), from which both the tape can be cut through a longitudinal section for the sections for shaping the outer shell, as well as the wider tape is obtained, on which the successive Small pictures are printed.

This latter band is, as said above, in the longitudinal direction folded and guided by deflection means in such a way that the first band comes to rest junter, so that as already seen above a single cutting device acting in the transverse direction, at the same time individual ones intended for the outer fold Cuts off sections and individual images. Photosensitive means associated with the two bands monitor and control the centering of the two belts on the cutting device.

The actual packaging process according to the selected type of packaging takes place on the same as already described above Way.

With reference to the mentioned folding in the longitudinal direction of the tape on which the images are printed one after the other, let's assume that this tape is divided into at least three

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Parts or layers lying on top of one another are to be folded in order to make its width equal to or smaller than the width of the product, ^{as already stated above with reference to the row index 1.}

This folding process is conventionally carried out with the aid of a plurality of stationary plates which are longitudinally the course of the tape in different angular positions are arranged and continuously fold the tape into three or more superimposed parts and simultaneously with their Edges create the longitudinal fold lines of this tape.

In these devices, briefly described above, act on this band, which is subject to the action of the stationary platelets, creates large frictional forces, which enhances the quality of the Can seriously affect the tape.

If one also takes into account that this is the case for such packages The material used is often paraffinized, i.e. by applying a paraffin film to the surface has been made watertight, it is evident that by the exerted by "these fixed platelets Frictional effect of this. Surface film is scraped off, whereby the scraped material falls into the machine organs, and the watertightness of the one intended for the exterior envelope Material is lost.

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The present invention therefore aims to overcome the above deficiencies by providing a Device which folds a continuous strip of packaging material in the longitudinal direction into a plurality of parts, without this tape being subjected to friction or scraping.

Another object of the present invention is that Realization of a device of the type mentioned above, ν which is designed with particularly simple and economical movable folding elements is provided.

These and other objectives are achieved by the device according to the invention for folding and laying a band on top of one another in the longitudinal direction in the form of a bellows, in particular for folding a band of packaging material in devices for loading packaging machines with material sections lying one on top of the other for the formation of several folds existing packaging, starting from a single continuous band which is cut in the longitudinal direction into two parts, of which the part intended for the inner wrapping is folded in the longitudinal direction like bellows into a plurality of parts or layers, while the a for the Outside wrapping certain part is placed over the longitudinally folded Stre'iferi "; this device is

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characterized by a plurality of movable lengthways Organ pairs arranged to be folded band part, the individual movable organs of each pair being shaped in this way or are arranged in contact with the opposite sides of this band part so that they are substantially the same giving a jagged course whereby "the layers in Move closer and closer together in the longitudinal direction of the tape until the individual layers touch each other j where Guide and deflection means are provided in order to keep these layers mutually in contact with one another, as well as guiding and deflecting means, around the part of the band intended for the outer wrapping folded over this in the longitudinal direction to guide the part intended for the inside wrapping. Other features and advantages will be made clearer from the following detailed description of a preferred embodiment of the subject matter of the invention with reference to the attached exemplary drawings. It shows: FIG. 1: a schematic perspective view of the

inventive device, and Figure 2:... a side view "of Fig this apparatus l ^v geht'hervor that coming in a conventional manner by a not shown coil mixed tape 1 of a continuous disk-shaped measure- · ser 2 and a Counter roller 3, as it is in "the loading of

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such packaging materials is common practice in Is cut lengthwise into two strips la and Ib. The strip la is used for the production of the outer shell and is on the in · the: finished packaging facing outwards Page provided with a specific imprint, which is symbolically denoted by Ic in FIG. The stripe Ib is wider than the strip la and forms after it has been folded in the longitudinal direction as described below has been, the inner shell. This strip Ib is on the side labeled Id with not shown pictures Mistake.

This strip Ib will do rolls 4 and 5 as well as between a first pair of rollers 6 and 7 and then guided between a second pair of rollers 8 and 9.

The rollers of these roller pairs 6-7 and 8-9 are shaped in such a way that they form the sections of a truncated cone Outer surfaces or sheaths face each other and at least on the middle sections 6a-7a and 8a-9a, the length of which corresponds to the desired width of the middle longitudinal band layer, 'with an Er ^ -

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testifying are provided. "'"

The thus formed roles of each pair 6-7 and -8-9 act together on the strip Ib. The between two successive and opposite frustoconical

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fen surfaces of the roller pair 8-9 included angle is smaller than the corresponding, .by the roller pair 6-7 formed angle (see Fig. 2, in which the rollers 6 and 8 by 90 ° relative to the axes of the corresponding associated Rolls 7 and 9 are shown rotated), so that the first between these rolls 6-7 running strip Ib after and after being crimped in the transverse direction, and only when passing through between the pair of rollers 8-9 is folded into three pronounced longitudinal strips le, If, 'Ig, which are at Advancing against the pair of deflection rollers 1Ö-11 more and more against each other approach. This pair of rollers 10-11 presses the longitudinally folded strip in the desired position bellows-like together, so that the same with the help of pulleys 12-13-14 parallel under the strip la guided and can then be conveyed together with this strip to the cutting "device, which the two strips cut into sections that are conventionally

and way to be fed to the packaging machine. The rollers of the roller pairs 6-7 and 8-9 are loosely rotatable corresponding axes 6'-7 'and 8'-9' supported; in alternative these roles can also be done with the help of conventional transmission or drive elements with the feed speed of the tape strip Ib are driven.

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In practice, such a device was used to provide all Goals achieved; obviously others can too Realized embodiments with technically equivalent organs in the range of the patent claims listed below verden.

For example, the pairs of rollers 6-7 and 8-9 can be replaced with movable members consisting of a plurality of pairs of closed belts; the two straps of each pair being arranged on the opposite sides of the tape strip Ib to be folded. In this case diese'Riemenpaare are transverse to this Bandstrei-.fen Ib in two parallel rows, but mutually offset ε ( "quinconce") and is provided with a motion which on in derBewegungs- or advancing direction, this to be folded tape strip Ib of converging levels from top to bottom.

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Claims (5)

PATENTAN 'S CLAIMS !. ^ Device for folding and laying a ribbon on top of one another "in the longitudinal direction, in the form of a bellows, in particular for folding a strip of packaging material in devices for loading packaging machines with superimposed material sections for the formation of packaging consisting of several envelopes kungen, whereby one starts from a single continuous band, which in the longitudinal direction in two parts (la and Ib) is cut, of which the part intended for the inner wrapping in the longitudinal direction bellows-like into a A large number of parts or layers are folded, while the part intended for the outer fold is folded over the in Lengthwise folded strip is placed; this device is characterized by a large number of movable, arranged along the strip to be folded (Ib) Organ pairs (6-7, 8-9), the individual movable organs of each pair being shaped or in contact in this way with the opposite sides of this strip of tape arranged to be substantially the same give a jagged bellows-like course, whereby " the layers (le, If, Ig) in the longitudinal direction of the tape get closer and closer together until they are mutually exclusive 509881/0315 Stir once, with KUhrungs- and deflecting means (10, 11, 12) are provided to make these layers mutually interrelated to keep in contact, as well as guide and deflection means (13 and 14), around the band part intended for the outer wrapping (la) folded over this in the longitudinal direction, for to guide the inner fold (lb). 2. Device according to claim 1, characterized in that the movable members of each pair of rollers (6-7, 8-9) exist whose outer surfaces or sheaths from opposite Sections of frustoconical surfaces (6a-7a, 8a-9a) are formed and at least on the middle sections, . the length of which corresponds to the width of the desired central longitudinal strip (le) of the strip, a generatrix the rollers of each pair cooperating with one another and that between successive and opposing ones frustoconical surfaces of each pair included angles from one pair of rollers to the other in the Bewegungsbzw. Longitudinal feed direction of the belt part to be folded (lb) decreases. 3. Apparatus according to claim 1, characterized in - that the movable organs consist of a large number of closed pairs of straps, one strap on each of the opposing straps Sides of the tape to be folded 509881/03 15 OfiiGiMAL inspected is ordered, while these pairs transversely - to this strip of tape. fen are arranged in two parallel rows, but offset ("quinconce") to one another and provided with a movement which runs on planes converging from top to bottom in the direction of movement or longitudinal advance of this strip of tape to be folded. 4. Device according to claims 1 to 3, characterized in that that these movable organs (6-7, 8-9) are loosely rotatably mounted. 5. Device according to claims 1 to 3, characterized in that that these movable organs (6-7, 8-9) are rotatably mounted and at the speed of the to folding tape strip (Ib) are driven. ORiGfMAL [[SiSF Z -w 1 £ _ £ 509881/0315