EP0800996A2 - Method and device for manufacturing a label web roll - Google Patents

Abstract

A guide (10) leading to a deflector edge has an extension. A transfer roller is situated near the deflector edge. Drive elements move the backing (22) running over the transfer roller on the other side of the gap between the deflector edge and the transfer roller, for transferring the detached labels (24) in the pre-set direction of travel. The backing strip is driven along a first guide and deflected on a sharp first deflector edge (18) to form a loop. Close to the first deflector edge, a second deflector edge deflects the backing strip in the guide running in the original direction of travel.

Description

The invention relates to a method for producing a roll of self-adhesive labels arranged on a carrier, releasably adhered to the carrier, in particular self-adhesive labels produced by punching out from a label material carried by a band-shaped carrier, and a device for carrying out this method.

It is known to produce self-adhesive labels in such a way that individual labels are punched out in the desired shape and size from a label material which is carried by a band-shaped carrier and is detachably bonded to the latter by punching out with a suitable punching tool. The carrier with the self-adhesive labels adhering to it is then, after removing the unnecessary residues of the label material, that is to say after the so-called scraping, wound up into a label roll, which is later inserted into a label dispenser, with the aid of which the detached labels are placed on an object to be labeled or articles are transferred.

In the case of such a label dispenser, the band-shaped carrier is pulled off around a sharp deflection edge, the self-adhesive labels in the region of the deflection edge moving away from the Loosen the carrier and increasingly project freely over the deflection edge so that they can be glued to the object to be labeled using a pressure roller or the like.

While the self-adhesive labels can be removed from the tape-shaped carrier and transferred to the object to be labeled in many cases without problems in the manner described using conventional label rolls, difficulties have arisen in some cases, especially with punched-out labels from a relatively soft polyethylene material during the labeling process , namely a relatively frequent tearing of the band-shaped carrier and / or errors when removing the punched-out individual labels.

When examining the above-mentioned problems, it is found that when the self-adhesive labels are punched out of the label material with the punch tool, the label material is partially cut into the tape-shaped carrier, which on the one hand increases the tensile strength of the carrier for the labeling process as a function of the depth The size and position of the incisions created during the punching process is impaired and, on the other hand, the trouble-free detachment of the punched-out labels, which is due to the fact that a layer of adhesive is usually provided on the label-carrying upper side of the tape-shaped carrier, which easily removes the self-adhesive labels during the labeling process guaranteed and their damage by incisions in the punch tool an infiltration of adhesive material from the back of the labels into the interior of the tape-shaped carrier. It is The last-mentioned aspect of the adhesive seeping into the carrier is particularly serious when a label roll is stored for a long time after the self-adhesive labels have been punched out.

Based on the problem described above, the invention has for its object to provide an improved method for producing label rolls, which offers the possibility of avoiding the occurrence of problems with regard to the tensile strength of a band-shaped carrier for the self-adhesive labels and with regard to the release characteristics for the self-adhesive labels and if necessary, to optimally adapt the properties of the tape-shaped carrier for the self-adhesive labels to the function and working speed of a label dispenser on which the label roll is to be processed later during a labeling process.

The invention is also based on the object of specifying a suitable device for carrying out the method according to the invention.

As far as the method is concerned, the object is achieved by a method for producing a roll of self-adhesive labels arranged on a band-shaped carrier and releasably adhered to the carrier, which is characterized in that the self-adhesive labels are detached from the carrier at a sharp deflection edge and then with a new carrier or in a position offset from its original position on the carrier again with the carrier previously used.

It is a particular advantage of the method according to the invention that, if a new carrier is used, the properties of this carrier can be optimally matched to the intended use of the label roll, for example by using a particularly tensile carrier which is suitable for use in a high-speed label dispenser is suitable and its adhesive properties are matched to a high release speed for the labels.

If, on the other hand, the original carrier is to be used again, then the application of the self-adhesive labels, which is offset from the original position, prevents the penetration of adhesive into the incisions formed during the punching during a longer storage time, while on the other hand the tensile strength of the carrier provided with the incisions is partly due to the pasting the interfaces with the self-adhesive labels are improved again and in any case the special load on the carrier material at the beginning of a peeling process for a label does not occur exactly in the area of the incisions, since the labels have been moved.

In a particularly preferred variant of the method according to the invention for producing a roll of self-adhesive labels which are arranged on a carrier and are produced by punching out from a label material which is carried by a band-shaped carrier and are releasably adhered to the carrier, the band-shaped carrier is provided in a predetermined manner along the first guide after the punching process Direction of transport driven and deflected at a sharp first deflecting edge to form a material loop from the predetermined transport direction and the path of the self-adhesive labels moving in the transport direction and then again by a second deflecting edge arranged at a short distance from the sharp first deflecting edge in such a way to a second, in the original transport direction Guide deflected so that the labels in the area of the further guide are glued to the carrier already used, adjacent to a narrow gap formed between the two deflecting edges, in a position offset from the original position on the carrier.

In an embodiment of the invention, it has also proven to be advantageous if the labels in the region of the first deflecting edge adjacent to the gap are deformed in such a concave manner that their front part in the transport direction is raised above the top of the band-shaped carrier during the detaching process, so that it follows Passing the gap adjoining the deflection edge from above, for example with the aid of a relatively heavy pressure roller, can be glued to the new carrier or again to the previous carrier.

For the implementation of the method according to the invention, a device has proven to be advantageous, which is characterized in that a take-over element is provided as an extension of a guide leading to the deflection edge and at a short distance from the deflection edge, and in that drive devices are provided with the aid of which a the takeover element running carrier beyond a gap provided between the deflecting edge and the takeover element to take over the detached labels in the given transport direction, the takeover element according to a first variant of the invention is a takeover roller and according to another advantageous variant of the invention a takeover rail, which in particular at the end of a belt loop formed from the original band-shaped carrier for a renewed Deflection of the band-shaped carrier, so that it moves again after passing the gap in the same transport direction and at the same transport speed, it being understood that in this case a single drive device is sufficient to the band-shaped carrier on the inlet side of the device, in Area of the belt loop and on the outlet side of the device to advance to a predetermined speed.

In a further embodiment of a device according to the invention, it has proven to be advantageous if at least one deflecting roller is provided between the deflecting edge and the take-over element, which is preferably adjustable in order to vary the length of the tape loop in such a way that the self-adhesive labels are glued when re-glued with the carrier gives the desired offset from its original position on the carrier.

Furthermore, it has proven to be advantageous if the guide adjacent to the deflecting edge is provided on its upper side facing the band-shaped carrier during operation with a concavely curved deflecting groove, which is associated with a hold-down roller cooperating therewith, the radius of curvature of which is at most equal to the radius of curvature of the deflection channel.

This measure ensures that the label, which is stiffer than the band-shaped carrier, but at least has a free edge on which it can detach from the carrier, is directed slightly upward in the direction of travel of the carrier immediately before the deflecting edge during the detaching process , so that the front area of the label to be peeled off can more easily bridge the gap up to the takeover element in order to be glued behind the gap to the original or a new carrier. It is advantageous if the re-gluing of the label to the or a carrier is supported in a manner known per se in the case of labeling devices by a suitable pressure element, in particular a pressure roller, which, for example, is relatively heavy and has its own weight on the carrier in the transfer area can rest, it being advantageous if the pressure roller has a relatively soft surface, which prevents the label surface from being damaged during the transfer.

Fig. 1

eine schematische Darstellung einer ersten bevorzugten Ausführungsform einer Vorrichtung zur Durchführung des erfindungsgemäß Verfahrens;

Fig. 2

eine schematische Darstellung einer zweiten bevorzugten Ausführungsform einer Vorrichtung zur Durchführung des erfindungsgemäß Verfahrens, und

Fig. 3

eine Detaildarstellung einer bevorzugten Ausführungsform des an die einlaufseitige Umlenkkante angrenzenden Bereichs einer Bandführung einer Vorrichtung gemäß der Erfindung mit einer zugeordneten Niederhaltewalze.

Further details and advantages of the invention are explained in more detail below with reference to drawings. Show it:

Fig. 1

a schematic representation of a first preferred embodiment of an apparatus for performing the method according to the invention;

Fig. 2

a schematic representation of a second preferred embodiment of an apparatus for performing the method according to the invention, and

Fig. 3

a detailed view of a preferred embodiment of the area adjacent to the inlet-side deflection edge of a belt guide of a device according to the invention with an associated hold-down roller.

1 shows a device for carrying out the method according to the invention with an inlet-side guide 10, a first deflection edge 12, a deflection roller 14, a second deflection edge 16, an exit-side guide 18 and a pressure roller 20.

To carry out the method according to the invention, a band-shaped carrier 22, which carries individual labels 24, which are preferably produced by punching out, is pulled off a rotatable label roll 26 serving as a supply roll and in the direction of transport indicated by an arrow along the input-side guide 10 in the direction driven to the first deflecting edge 18 forming the end of the guide 10 on the input side. At this deflection edge 18, the self-adhesive labels 24 are detached from the support in the manner known per se from label dispensers by the sharp deflection of the band-shaped carrier 22, which is then guided around the deflection roller 14 in the running direction. A belt loop is formed, the size of which is determined by the position of the deflecting roller, which, like this, by a double arrow is indicated, is adjustable up or down. In the running direction behind the deflecting roller 14 there is, at least substantially at the same height as the deflecting edge 12, a second deflecting edge 16 on which the carrier 22 is again sharply deflected. The two deflection edges 12, 16 have a very small, exaggeratedly large distance a from one another in the drawing, this distance a or the gap width a between the two deflection edges 12, 16 being so small that it is practically only the corresponds to twice the material thickness of the band-shaped carrier 22. Behind the second deflection edge 16, the tape-shaped carrier 22 then arrives at the exit-side guide 18 and is wound into a new label roll 28, which is driven to rotate by suitable drive devices (not shown) and pulls the tape-shaped carrier 22 off the label roll 26 and longitudinally drives its entire path and at the same time can also drive the free-running deflection roller 14 to a rotary movement.

The labels 24, which are detached from the band-shaped carrier 22 in the region of the first deflecting edge 12, advance freely beyond the gap a in the course of the detaching process and are glued again to the band-shaped carrier 22 in the region of the second deflecting edge 16, the manufacturing process the renewed adhesive connection is supported by the pressure roller 20, which can also be designed as a free-running roller, and, based solely on its weight, generates a corresponding contact pressure for the labels 24 which have been detached and are to be bonded again to the carrier 22 behind the second deflection edge 16. The pressure roller 20 preferably has a soft surface so as not to scratch or otherwise damage the surface of the labels 24.

In the device according to FIG. 1, the circumference and the position of the deflection roller 14 are selected such that the self-adhesive labels 24 are glued to the carrier in the region of the exit-side guide 18 in a position which is offset from the original position of the labels detached from the carrier 22 is, so that during the embossing process any incisions that may have occurred in the carrier material no longer coincide with the punched-out edge regions of the newly affixed labels 24, which, as explained at the outset, on the one hand improves the tensile strength of the band-shaped carrier 22 for further processing thereof and on the other hand the infiltration of adhesive prevented from the back of the labels into the carrier material, so that they can be quickly and cleanly removed from the carrier during a labeling process, even if the newly produced label roll 28 on the output side of the device after its completion is still stored for a certain time.

In addition to the device according to FIG. 1, it should be added that instead of a single deflecting roller 14, two or more deflecting rollers can also be used, at least one of which should be adjustable in order to be able to regulate the length of the belt loop formed by these deflecting devices, for example to achieve the desired one Offset in order to achieve the self-labels 24 which are again bonded to the carrier 22 in the region of the second guide 18 compared to the incisions in the carrier material during the punching process.

The device shown in FIG. 2 differs from that according to FIG. 1 in that the labels 24 detached at the first deflecting edge 12 are not transferred back to the original carrier 22 after their transfer over the gap, but to a new carrier 22 ′ the rest of the illustration according to Figure 2 speaks for itself.

To support the detaching process for the labels 24 in the region of the first deflecting edge 12, it is advantageous if a groove 30 is formed immediately adjacent to this guide edge 12 in the upper side of the guide 10 on the input side, as is shown in the detailed illustration according to FIG. 3. The attachment of such a channel 30 in conjunction with a hold-down roller 32 cooperating therewith means that the initially concavely deformed labels run slightly obliquely upwards at the start of the detachment process at the deflection edge 12, so that they are raised somewhat compared to the previous travel path and therefore the Gaps can be bridged more easily up to the takeover element, that is, up to the second deflection edge 16 or to the circumference of the takeover roller. It should be noted that the hold-down roller should normally have a diameter which is slightly smaller than the curvature diameter of the channel 30, so that the labels and the carrier 22 carrying them are pressed down to the bottom of the channel 30 in a defined manner. On the other hand, however, the channel 30 and the hold-down roller 32 should also be dimensioned such that the angle of rise of the front edge in the transport direction of a label 24 detached from the band-shaped carrier 22 in the region of the first deflection edge 12 is not too steep to prevent the label 24 from prematurely running against the pressure roller 20 in a position elevated relative to the plane of the exit-side guide 18 and being deformed by the latter.

From the above description it is clear that the invention opens up the possibility, starting from the already finished, conventional label rolls, to produce new label rolls by converting the self-adhesive labels, in which the material of the carrier can be optimally selected with regard to special requirements or where a harmful influence of incisions in the material of the band-shaped carrier, which are produced during the punching process, is prevented.

Claims (10)

A method for producing a roll of self-adhesive labels arranged on a tape-shaped carrier and releasably adhered to the carrier, characterized in that the self-adhesive labels are detached from the carrier at a sharp deflection edge and then moved with a new carrier or in a position opposite to their original position on the carrier Position can be glued back to the previously used carrier. A method according to claim 1 for producing a roll of self-adhesive labels which are arranged on a carrier and which are produced by punching out from a label material carried by a band-shaped carrier and are releasably bonded to the carrier, characterized in that the band-shaped carrier after the punching process along a first guide in a predetermined manner Driven in the transport direction and deflected at a sharp first deflection edge to form a material loop from the predetermined transport direction and the path of the self-adhesive labels moving in the transport direction and then again by a second deflection edge arranged at a short distance from the sharp first deflection edge in such a way to a second, in the original Transport direction extending guide is deflected that the labels in the region of the further guide adjacent to a narrow gap formed between the two deflection edges in a compared to their original Chen position on the carrier offset position be glued back to the carrier already used. A method according to claim 1 or 2, characterized in that the labels in the region of the first deflecting edge adjacent to the gap are deformed in such a concave manner that their front part in the transport direction is raised above the top of the band-shaped carrier during the detaching process. Device for carrying out the method according to one of claims 1 to 3, characterized in that a take-over element is provided in an extension of a guide leading to the deflecting edge and at a short distance from the deflecting edge, and in that drive devices are provided with the aid of which a running element passes over the take-over element Carrier beyond a gap provided between the deflecting edge and the take-over element can be driven in the predetermined transport direction for taking over the detached labels. Apparatus according to claim 4, characterized in that the takeover element is a takeover roller. Apparatus according to claim 4, characterized in that the take-over element is a take-over rail, through which the band-shaped carrier at the end of a band loop formed from the original band-shaped carrier can be deflected again in such a way that after passing through the gap again in the previous transport direction and with previous ones Transport speed moved on. tion and moved on at the previous transport speed. Device according to one of claims 4 to 6, characterized in that at least one deflecting roller is provided between the deflecting edge and the take-over element, which is preferably adjustable in order to vary the length of the tape loop in such a way that the self-adhesive labels are re-glued to the carrier the desired intent to their original position on the carrier results. Device according to one of claims 4 to 7, characterized in that the guide adjacent to the deflecting edge is provided on its upper side facing the band-shaped carrier during operation with a concavely curved deflection channel which is associated with a holding-down roller which cooperates therewith and whose radius of curvature is at most equal to the radius of curvature the deflector is. Device according to one of claims 4 to 8, characterized in that a pressing element is provided adjacent to the takeover element in a takeover area for the previously detached chains. Apparatus according to claim 9, characterized in that the pressure element is designed as a relatively heavy, free-running pressure roller with its own weight resting on the carrier with a soft surface.

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