EP3027516B1 - Methods and device for producing blanks for collars of packages for cigarettes - Google Patents

Description

The invention relates to a method for the production of blanks, in particular collars, from packaging material, preferably for packs of cigarettes, wherein a material web is fed to at least one embossing roll, the material web based on a full revolution of the embossing roll by 360 ° during at least a partial rotation phase with embossing provides and during at least one other partial rotation phase does not introduce embossments in the material web, and wherein a subsequent separating cutting roller provides the material web to form individual blanks with separating cuts. In addition, the invention relates to a corresponding device for carrying out the method and an embossing roller, which can be used in such a device.

Such methods and devices are in the DE 10 2005 056 627 A1 the applicant discloses. It is shown to provide the peripheral surface of an embossing roll for embossing inner wrappers for cigarette packs with a franking. The embossing roller segmented in this way makes it possible to provide the corresponding blank with an unembossed area or not to have to emboss the entire blank. If misalignments between the material web to be embossed and the embossing roll are detected, the relative position between the embossing roll and the material web can also be adapted. An adaptation of the relative position between the material web and the embossing roller takes place in the DE 10 2005 056 627 A1 The fact that in the phases in which the material web is not embossed by the embossing roll due to the aforementioned recess, that is, the web speed is changed, the web speed is changed For this purpose, the speed of a separate feed roller is changed. However, the use of such feed rollers has disadvantages. Among other things, these feed rollers have a high Required space, so that separating cutting roller, embossing roller and feed roller regularly do not fit within a common housing.

In the DE 10 2009 030 069 A1 a device for embossing particular collar of a folding box for cigarettes is shown in which a sensor scans printed marks on the material web and thus controls the rolls for embossing and cutting. In this way, an embossing can be accurately positioned.

The US 2009/0050001 A1 discloses an apparatus for processing packaging films. This embossing rollers are provided for embossing folding creases whose rotational speed can be changed. For example, the embossing rollers are decelerated before embossing, so that the embossing is carried out at a slower rotational speed. In this way, the quality of the embossing is to be improved. Subsequently, that is, in a phase in which no embossing takes place, the embossing rollers are accelerated so that the position of the web is adapted to the following process again.

From the US 5,022,950 goes out a device for embossing and cutting of printed labels. In this case, misalignments between the embossing rollers and the material web are compensated.

Furthermore, from the WO 02/092295 A1 a device is known in which a position of a printed and embossed material web is synchronized with a separating cutting roller. For this purpose, the rotational speed of the embossing rollers can be changed.

Proceeding from this, it is an object of the present invention to further develop the aforementioned method and the device mentioned. This particular with regard to a compact manufacturing process with as few organs.

This object is achieved by a method having the features of claim 1 and a device having the features of claim 4.

According to the invention, it is accordingly provided to drive the segmented embossing roll by means of a drive device, so that it can transmit conveying forces to the material web. The drive device may be one of only the at least one Embossing roller assigned to be local servo motor. Theoretically, however, the drive device can also be a central drive device of the device for producing the blanks with which the embossing roller is connected in a gear. It is important that the embossing roller in other words takes over the function of a (driven) feed roller. According to the invention, the aforementioned conveying forces are regularly transmitted by the at least one or preferably several embossing segments (e) of the embossing roller. At the same time to allow an adjustment of the relative position between the embossing roller and the material web when needed, the rotational speed of the embossing roller, which is in normal or standard operation, that is outside the fitting phase, expediently coupled to the machine cycle of the manufacturing device, can be transitionally changed or varied , Namely, in the at least one partial rotation phase or in the partial rotation phases in which the embossing roller does not transfer conveying forces. These are regularly the partial rotation phases in which the material web runs free on the embossing roll, ie in which the release segment of the material web is opposite, while the material web is guided along the release segment.

The speed of the embossing roller can be increased or decreased within these respective partial rotation phases, for example briefly over the previous, derived from the machine cycle standard rotational speed of the embossing roller and braked or accelerated to the standard speed again at the latest at the conclusion of this partial rotation phase. Namely at the latest until the time at which the next embossing segment engages in the course of the further rotation of the embossing roll with the material web and correspondingly transfers conveying forces again. In other words, the partial rotation phases in which the material web runs free on the embossing roller are utilized in order to bring about a change in the relative position between the embossing roller and the material web. This, of course, regularly only if such a change is necessary, so if necessary. Accordingly, if a malposition between the material web and the embossing roll has been detected by means of suitable measures known from the prior art, which would lead or lead to the embossings not being applied to the material web in the correct position. For the detection of misalignments, for example, the positions of the material web on the material web longitudinally applied at constant intervals marks, in particular print marks, detected and compared with determined actual rotational positions of the embossing roll.

Alternatively or additionally (in the context of the application, in particular the claims, for the phrase "alternatively or additionally" also "and / or" in the sense of "and" or "or" used) can be provided by transitional adaptation of the rotational speed of Embossing roller also, if necessary, to change the relative position between separating cutting roller on the one hand and material web on the other. This, however, by speed adjustments in partial rotation phases in which the embossing roller transmits conveying forces to the web and the embossing roller as a preferred roller (speed) determines the speed at which the web is guided along the separating cutting roll, so also a rotational speed adjustment of the embossing roll in these phases leads to an adjustment of the material web speed. If the material web at the same time free or substantially free runs on the separating cutting roller, in this way the relative position between the material web and the separating cutting roll can be influenced in the desired manner.

The speed of the embossing roller - similar to the adjustment of the relative position between embossing roll and material web - for example, increased or decreased briefly over the derived from the machine cycle standard rotational speed of the embossing roll and braked at the latest at the conclusion of this partial rotation phase back to the standard speed or be accelerated.

By the embossing roller is used in the aforementioned manner as a driven conveying member, according to the invention can basically be dispensed with a separate feed roller. For this purpose, however, it is expedient to ensure that in the partial rotation phases in which the material web runs free on the embossing roll, another driven conveying element takes over the material web conveying.

According to the invention this assumes the preferably driven in the machine cycle by means of a suitable drive device direction or in a derived speed rotating separating cutting roller, which is equipped with at least one suitable driving segment, regularly several Mitnehmersegmenten, with or with those in the said partial rotation phases conveying forces on the Material web are transmitted. Regularly, the drive device is at the same time the central machine drive, with which the shaft of the separating cutting roller is connected by gearing. Alternatively, however, a servo motor assigned to the separating cutting roller can also be used as a separate or local drive.

In other words, the separating cutting roll on the one hand and the embossing roll on the other hand or their speeds and relative rotational positions in standard operation, that is outside of any adjustment phases in which the relative position of the material web is adjusted with respect to the embossing roller or the separating cutting roller, so matched or synchronized, in that at least either one roller or the other roller advances the material web as an advancing roller.

Fig. 1

eine Zigarettenpackung in Schrägansicht mit Prägungen im oberen Kragenbereich,

Fig. 2

einen Teilausschnitt einer im Vergleich zu der Kragenprägung aus Fig. 1 anderen Kragenprägung,

Fig. 3

einen Teilausschnitt der Kragenprägung aus Fig. 1,

Fig. 4

einen Teilausschnitt einer im Vergleich zu der Kragenprägung aus Fig. 1 anderen Kragenprägung,

Fig. 5

eine Seitenansicht einer Vorrichtung zur Herstellung von Kragenzuschnitten zu einem ersten Bearbeitungszeitpunkt,

Fig. 6

eine Draufsicht auf eine fortlaufende Materialbahn sowie einen einzelnen Zuschnitt, die zu dem in Fig. 5 gezeigten Bearbeitungszeitpunkt der Vorrichtung bearbeitet wird,

Fig. 7

die Vorrichtung aus Fig. 5 zu einem zweiten, anderen Bearbeitungszeitpunkt, ebenfalls in Seitenansicht,

Fig. 8

eine Draufsicht auf die fortlaufende Materialbahn, die zu dem in Fig. 7 gezeigten Bearbeitungszeitpunkt der Vorrichtung bearbeitet wird,

Fig. 9

eine Schnittdarstellung entsprechend der Schnittlinie IX-IX in Fig. 5,

Fig. 10

eine alternative Ausführungsform der Vorrichtung in einer Darstellung entsprechend Fig. 9,

Fig. 11

einen Schnitt durch die Fig. 5 entlang der Schnittlinie XI-XI,

Fig. 12

die Einzelheit XII aus Fig. 7 in vergrößerter Darstellung.

Further features of the present invention will become apparent from the appended claims, the following description of a preferred embodiment and from the accompanying drawings. It shows:

Fig. 1

a cigarette pack in an oblique view with imprints in the upper collar area,

Fig. 2

a partial section of a compared to the collar embossing Fig. 1 other collar embossing,

Fig. 3

a partial section of the collar embossing Fig. 1 .

Fig. 4

a partial section of a compared to the collar embossing Fig. 1 other collar embossing,

Fig. 5

a side view of an apparatus for the production of Kragenzuschnitten at a first processing time,

Fig. 6

a plan view of a continuous web of material as well as a single blank, which corresponds to the in Fig. 5 processing time shown the device is processed,

Fig. 7

the device off Fig. 5 to a second, different processing time, also in side view,

Fig. 8

a plan view of the continuous web, which corresponds to the in Fig. 7 processing time shown the device is processed,

Fig. 9

a sectional view corresponding to the section line IX-IX in Fig. 5 .

Fig. 10

an alternative embodiment of the device in a representation according to Fig. 9 .

Fig. 11

a cut through the Fig. 5 along the section line XI-XI,

Fig. 12

the detail XII Fig. 7 in an enlarged view.

The invention is described in more detail using the example of the production of a package 10 for cigarettes of the hinge-lid type. Of the entire manufacturing or packaging process for cigarette packs or cigarettes only the important part of the invention is shown. The non-described sub-processes of the production of cigarette packs can be implemented in conventional manner known to those skilled in the art.

The package 10 consists of the components box part 11, cover 12 and collar 13 ". Fig. 1 ) is, as usual with hinge-lid packs, arranged inside the box part 11 and stands out of the box part 11 open at the top. The collar 13 "extends in the closed position of the cover 12. The collar 13" extends in the area of the box front wall 14 and the box side walls 15. No collar 13 "is arranged in the area of the box rear wall 16. The collar 13 is correspondingly formed by a collar front wall 17 and collar side walls 18, which extend along corresponding walls of the box part 11.

In a manner known per se, the box part 11 serves as a receiving space for a package contents, namely in the present case for a cigarette block. The cigarette block is a group of cigarettes wrapped in a common wrapper or innerliner 19. The pack 10 is a known per se octagonal packing. Of course, the package 10 may also have other layouts.

A peculiarity of the pack 10 is that the collar 13 "has embossments.

In the collar 13 "of Fig. 1 and 3 On the one hand, this is an embossing pattern 20 "which preferably extends over the entire surface, in particular almost over the full collar width, over a large part of the upper region of the collar 13" visible to the consumer. In the present case above a closing edge 21 of the box part 11.

Furthermore, a stamping 23 surrounding a printed decorative element 22 can be seen.

The Fig. 2 and 4 show alternative collar 13 '' and 13 'with alternative or different from the other embossing patterns embossing patterns 20''and20'.

The decorative element 22 is a print which is applied together with a print mark 24 on the respective collar 13'-13 "'.

Preferably, the imprints, in this case the decorative element 22 and the print mark 24, are applied outside the packaging process, that is, printed on the material web 25 in a separate process, within which the material web 25 is produced. For example, a supplier of the cigarette (pack) manufacturer, who produces the material web 25, already apply the imprints 22, 24. Of course, the imprints 22, 24 can also take place during the ongoing packaging process, in which the cigarette packs 10 are produced while being filled with corresponding cigarettes.

The material web 25 is provided in the longitudinal direction at predetermined intervals with the imprints 22, 24, wherein the distance between two adjacent identical imprints, so for example two adjacent decorative Elements 22 and two adjacent print marks 24, the length of a single blank 26 corresponds.

All collars 13'-13 '"with the respective embossings 20'-20'" and 23 are produced in a common production process by individual blanks 26 being cut out of one and the same continuous material web 25 after the embossing processes. The manufacturing process is part of the overall packaging process for packaging cigarettes. In the present case, it takes place in the area of a corresponding packaging machine. Usually, the part of the packaging machine in which the collar is made, referred to as collar apparatus.

As part of the collar production process, the material web 25 is first provided with the embossments 20'-20 '"or 23. Alternatively, at least one embossment 20'-20'" or 23 could also be introduced outside the actual packaging process, ie, for example, also within the framework the prefabrication of the material web 25.

The embossings 20'-20 '"and 23 are introduced by means of an embossing device 27, which comprises an embossing roller pair 28.

Downstream of the embossing roller pair 28, a cutting device 29 is arranged with a separating cut roller pair 37, with which separating cuts are introduced into the material web 25 to form individual blanks 26 or individual collars 13 '- 13 ".

A transport roller pair 30 is positioned downstream of the cutter 29 and continues to feed the web 25 provided with cuts.

Finally, an accelerator roller pair 31 pulls the individual blanks 26 or collars 13 '- 13 "' from the material web 25 provided with the separating cuts while accelerating them.

The material web 25 or in the area of the accelerator roller pair 31 only individual blanks 26 are conveyed along a presently horizontal transport path 48 in each case between the successive pairs of rollers 28, 37, 30, 31.

In the further course, the collars 13'-13 '"produced in this way are further processed in a manner known per se in the context of the superordinate packaging process in the packaging machine.

A special feature concerns the embossing device 27. It has an embossing roller 27a which acts on the collar front wall 17, in the present case an upper embossing roller 27a, and a counter roller 27b, which in the present case is lower and is operatively coupled to the embossing roller 27a. The counter roll 27b is disposed opposite to the embossing roll 27a on the opposite side of the collar, in the present case the collar rear wall. The embossing roll 27a has a plurality of presently three, circumferentially spaced apart or distributed embossed segments 32a-32c. The embossing segments 32a-32c are each offset by approximately 120 °.

The counter-roller 27b, which is connected to the embossing roller 27a by means of a gear, has corresponding counterpart segments 34a-34c which are distributed over the circumference of the counter-roller 27b and are spaced apart from each other. In each case a counter segment presses during the embossing by the respective segment 32a-32c of the embossing roller 27a from below against the material web 25. The two rollers 27a, 27b are controlled or coordinated so that the aforementioned segments 32a, 34a; 32b, 34b; 32c, 34c are in pairs at least partially engaged with each other, so that the guided between the two rollers 27a, 27b material web 25 is partially embossed by the respective segment pairs. The segments 32a-32c and 34a-34c are provided in the region of their respective peripheral surface with small elevations and depressions as embossing means, which lead to the corresponding embossings 20'-20 '"and 23, respectively.

The embossing segment pair 32a; 34a has embossing means which bring in the embossing pattern 20 "', the embossing segment pair 32b; 34b has other embossing means which introduce the embossing pattern 20" and the embossing segment pair 32c; 34c on yet another embossing means for the embossing pattern 20 '. In addition, each of the embossing segment pair or of each embossing agent of the respective embossing segment pair still introduces the embossment 23.

As a result, a plurality of different embossings can successively be introduced one after the other into the same material web 25 with the embossing device 27 or the embossing rollers 27a, 27b segmented in this way, which ultimately enables the production of the three different collars 13'-13 "'.

In the circumferential direction between the individual embossed segments 32a-32c of the embossing roll 27a, there are respective free segments 33a-33c. In the present case, these are also each offset by 120 ° to each other. The clearance segments 33a-33c are recesses or clearances extending in particular over the full width of the peripheral surface in the peripheral surface of the embossing roller 27a.

The relative position of the printings 22, 24 on the one hand and the embossments 20'-20 '"or 23 on the other hand or the printings 22, 24 and the embossing roller pair 28 is transmitted via a print mark reader 35 and a drive 36 driving the pair of rollers 28, in this case a servomotor, controlled by suitable control so that the embossments 20'-20 "'and 23 are positioned at the correct position with respect to the print marks 24 and the printings 22, respectively. This will be explained later.

In the present case, the embossing roller pair 28 also serves as a conveying member or as an advancing roller pair which exerts conveying forces on the material web 25 as soon as one of the embossing segments 32a-32c of the embossing roller 27a engages with the respective embossing segment 34a-34c of the embossing roller 27b Material web 25 is located or brings the corresponding imprints.

The embossing roller pair 27a, 27b thereby pushes the material web 25 downstream along the separating cut roller pair 37 of the cutting device 29 in the direction of the transport roller pair 30. It is thus possible to dispense with a separate conveying element or a separate feed roller.

The advance of the material web 25 naturally does not take place when the material web 25 passes through the embossing roller pair 28, while the release segments 32a-32c move along the material web 25 or when no imprints are applied.

In order to provide for this case for a further transport of the web 25, the cutting device 29 and the roller pair 37 of the same is formed in a special way. It comprises an upper knife roll 38a arranged on the collar front wall side 17 and a lower counter roll 38b arranged on the collar rear wall side. The knife roller 38a has distributed over its peripheral surface spaced apart cutting means 39, in the present case knife. The knives 39 each have identical contours 40. But this does not have to be this way. The contours of the individual blades 39 can rather differ from each other.

The knives 39 bring in the web 25 suitable separating cuts. The contour 40 of the respective knife 39 defines the course of the respective upper edge or the respective lower edge of the later collar 13'-13 "'. The separating cuts are introduced while the material web 25 is moved through between the two rollers 38a, 38b.

It is particularly important that each knife 39 of the separating cutting roll 38a is associated with a leading segment 41 leading in relation to the direction of rotation of the knife roll 38a. As in Fig. 12 is shown, the Mitnehmersegment 41 in the present case a arranged in a portion of the peripheral surface of the knife roller 38a serrated surface which engages the web 25, and shortly before the respective blade 39 brings the appropriate separating cut. The driver segment 41 leaves behind on the material web 25 each have a Greifflächenabdruck 43rd

In normal operation or in standard operation of the collar apparatus or the manufacturing device for producing collars, the rotational movements of the embossing roller pair 28 and the separating cut roller pair 37 are coordinated so that the driver segment 41 of the knife roller 38a further advances or grips the material web 25 at the times the embossing roller pair 28 does not introduce any embossments into the material web 25 or transfers any conveying forces to the material web 25. As a result, a continuous propulsion of the material web 25 is ensured overall in the best case.

Should the control of the device determine that the relative position of the material web 25 has a misalignment with respect to the embossing roll 27a or the embossing roll pair 28, so that the positions of the embossments 20'-20 '"or 23 introduced relative to the embossing or embossing positions Printings 22 and 24 are or would be incorrect, the controller changes this relative position.

This is achieved by the speed of the embossing roller pair 28 in the partial rotation phases in which no conveying forces are applied to the material web 25, in which the material web 25 therefore passes freely between the embossing rollers 27a, 27b due to the release segments 33a-33c, respectively in the short term or transitional manner to adapt the relative position is changed, namely, precisely during these partial rotation phases.

For example, in one or more of these phases, embossing roller pair 28 may be temporarily accelerated to adjust the relative position. At the latest at the end of the partial rotation phase, the embossing roller pair is then braked back to the original speed value, namely the value that is set in the standard mode and which is derived regularly from the machine cycle or the machine speed. Alternatively, the embossing roller pair 28 can of course also initially be braked for a short time in these partial rotation phases and then accelerated back to the original value or the standard value.

In Fig. 7 is that rotational position of the embossing roller pair 28 to recognize, in each of which the correction of the relative position can take place. With respect to the material web 25, the correction in the unembossed region 42 (FIG. Fig. 8 ) between two embossed patterns, in which Fig. 8 for example, the embossing patterns 20 "and 20"'.

During the correction of the relative position of the embossing roller pair 28 relative to the material web 25 by changing the rotational speed thereof, the material web 25 otherwise regularly runs at a still constant standard speed through the embossing rollers 27a, 27b, namely in the present case due to the conveying forces of the roller pair 37 of the cutting device used as advancing rollers 29, whose rotational speed is coupled to the machine cycle or derived from this.

If the controller recognizes on the basis of the position of the print marks 24 and the rotational position of the roller pair 37 that there is a misalignment, in particular of the knife roller 38a relative to the material web 25, that accordingly the separating cuts take place or would take place at wrong positions, it ensures that these too incorrect relative position is adjusted or corrected.

This in partial rotation phases of the roller pair 37, in which the driver segments 41 of the knife roller 38a are not in engagement with the material web 25 and therefore exert no conveying forces on the material web 25, cf. Fig. 5 , With reference to the material web 25, this phase corresponds to the region or section 56, cf. Fig. 6 , In these phases, in particular in the rotational phases in which the respective driver segment 41 has just disengaged from the material web 25 until the next severing cut of the knife 39 next following in the direction of rotation, the (conveying) speed of the embossing roller pair 28 is transitionally changed. Namely, based on the rotations of the embossing roller pair in the phases in which the embossing roller pair 28 is in the embossing and thus conveying forces transmitted engagement with the material web 25. The embossing roller pair 28 can then accelerate or decelerate the material web 25 in a suitable manner and In accordance with the relative position of the material web 25 relative to the pair of rollers 38 influence or adapt.

As in Fig. 9 is shown, the knife roller 37a also has a plurality of circumferential circumferential, in each case in the axial direction parallel spaced Rilleneindrücker 54, with which parallel to the web longitudinal edges extending, spaced therefrom each creasing lines 55 can be pressed into the web 25. Along this crease lines 55, the collar 13'-13 '"later in the in Fig. 1 be folded shown shape.

Another special feature relates to the accelerator roller pair 31. It has an upper, the collar front wall 17 facing the accelerator roller 50a and a present lower, the collar rear wall facing counter roller 50b. The accelerator roller 50a is segmented. Their peripheral surface has clearances 51 and 52. In this case, the clearing 52 serves to protect the embossments 20'-20 '"and 23 applied to the respective collars 13'-13'" or the individual blanks 26, respectively. The accelerator roller 50a is thus that the indicia 52 is opposed to the embossments 20'-20 '' 'and 23, respectively, during transport of the finished collars 13'-13' 'so that the accelerator roller 50a does not contact the collar 13'-13' '' in the embossed areas Aiming 51 serves to immerse the respective tip of the collars 13'-13 "when they are respectively transferred to the area of the rollers 50a, 50b. To transmit conveying forces or to accelerate them, the collars 13'-13 "are then gripped by a driver segment 53 in unembossed regions of the blank.

In the Fig. 10 an alternative embodiment of the invention is shown in which the knife roller 38a - unlike the embodiment according to FIG Fig. 9 - No groove indentor 54 has. This has the advantage that the material web 25 in the event that in the manner described above, an adjustment of the relative position between the knife roller 37 a and web 25 should be necessary, completely free relative to the knife roller 37 a is movable and this movement is not by that of the Rilleneindrücker 54 applied pressure is hindered. In order to still be able to bring in score lines 55, in this case provided that the accelerator roller 50a along their peripheral surface corresponding Rilleneindrücker 54 'to produce the score lines 55.

In order to increase the bending stiffness of the material web 25 during the feed transport of the material web 25 through the embossing roller pair 28, a device 44 for bending or bending the material web 25 is disposed between the embossing roller pair 28 and the cutting device 29. In the present case, the material web 25 is arched symmetrically to the longitudinal central axis, in such a way that the free longitudinal edges thereof are bent downwards.

The device 44 comprises a first guide means 45, namely in the present case a mounted on horizontal support members 46 role. The (in this case horizontal) axis of rotation of the roller is arranged transversely to the longitudinal extent of the material web 25. The roller 45 is positioned centrally below the longitudinal central axis of the material web 25 and thereby aligned symmetrically to this. It supports the material web 25 from below or the material web 25 lies in a central region on the peripheral surface of the roller 45.

In the region of each of the free longitudinal edges of the material web 25, in each case slightly offset inwards or to the longitudinal central axis, a further guide means 47a, 47b are respectively arranged on the upper material web side, namely in each case a roller 47a or 47b. The rollers 47a, 47b are mounted such that their peripheral surfaces together with the circumferential surface of the roller 45 define a transport path 49 which is curved symmetrically relative to the longitudinal center axis of the material web for the material web 25. The rollers 47a, b press the material web 25 in the region of their longitudinal edges - as already indicated - from top to bottom. LIST OF REFERENCE NUMBERS 10 pack 32b coin segment 11 box part 32c coin segment 12 cover 33a free segment 13 ' collar 33b free segment 13 " collar 33c free segment 13 '' collar 34a against segment 14 Box front wall 34b against segment 15 Box side wall 34c against segment 16 Box rear wall 35 Print Mark 17 Collar front wall 36 drive 18 Collar side walls 37 Separating cut roller pair 19 inner liner 38a knife roll 20 ' embossed pattern 38b backing roll 20 " embossed pattern 39 knife 20 '' embossed pattern 40 knife contour 21 closing edge 41 driving segment 22 Decorative element 42 unembossed area 23 embossing 43 Gripping surface impression 24 print mark 44 Facility 25 web 45 role 26 blanks 46 supporting part 27 embosser 47a role 27a embossing roller 47b role 27b backing roll 48 transport path 28 Embossing roll pair 49 transport path 29 cutter 50a accelerator roller 30 Transport roller pair 50b accelerator roller 31 Accelerator roller pair 51 franking 32a coin segment 52 franking 53 driving segment 54 Rilleneindrücker 55 creasing 56 Area

Claims (8)

1. A method for producing blanks from packaging material, preferably for packages of cigarettes, wherein a material web (25) is fed to at least one embossing cylinder (27a), which provides the material web (25) with embossings (20'-20'", 23) during at least one partial rotation phase in relation to a complete revolution of the embossing cylinder (27a) through 360° and which does not introduce any embossings (20'-20"', 23) into the material web (25) during at least one other partial rotation phase, and wherein a subsequent severing-cut cylinder (38a) provides the material web (25) with severing cuts in order to form individual blanks (26), characterized in that the embossing cylinder (27a) is driven by a drive arrangement (36) and, in particular in the phases in which it introduces the embossings (20'-20'", 23) into the material web (25), transfers conveying forces to the material web (25), and in that the severing-cut cylinder (38a) in turn transfers conveying forces to the material web (25) by means of a suitable driver segment (41) in a partial rotation phase in which the embossing cylinder (27a) does not transfer any conveying forces to the material web (25).
2. The method as claimed in claim 1, characterised in that the material web (25) is curved, in particular upwardly, along its longitudinal centre axis over its path from the embossing cylinder (27a) to the severing-cut cylinder (38a) and is then (further) conveyed in a curved manner to the severing-cut cylinder (38a).
3. The method as claimed in claim 1 or 2, characterised in that the individual blanks (26) are removed from the material web (25) downstream of the severing-cut cylinder (38a) by an accelerator cylinder (50a), which is controlled in such a way that at least one driver segment (41) thereof transfers conveying forces to an unembossed region of the blank (26) during a partial rotation phase of the accelerator cylinder (50a), and in that at least one free segment (51, 52) of the accelerator cylinder (50) is directed to an embossed region of the blank (26) when the blank, during another partial rotation phase of the accelerator cylinder (50a), is guided along the accelerator cylinder (50a) in such a way that the free segment (51, 52) does not contact the embossed region.
4. A device for producing blanks, in particular collars, from packaging material, preferably for packages for cigarettes, in particular for carrying out the method as claimed in one or more of the preceding claims, comprising at least one embossing cylinder (27a) having at least one embossing segment (32a-32c) by means of which a material web (25) can be provided with embossings (20'-20"', 23) during a partial rotation phase of the embossing cylinder (27a), and also comprising at least one free segment (33a-33c), which, during another partial rotation phase, does not introduce an embossing (20'-20'", 23), and comprising a severing-cut cylinder (38a) arranged downstream of the embossing cylinder (27a) and having individual severing means (39), in particular severing knives, with which the material web (25) can be severed, in particular cyclically, into individual blanks (26), characterised in that the embossing cylinder (27a) is driven by a drive arrangement (36) and transfers conveying forces onto the material web (25) in particular in phases in which it introduces the embossings (20-20'", 23) into the material web (25), and in that the severing-cut cylinder (38a) has at least one driver segment (41), with which conveying forces can be transferred onto the material web (25) by the severing-cut cylinder (38a) during a partial rotation phase in which the embossing cylinder (27a) does not transfer any conveying forces to the material web (25).
5. The device as claimed in claim 4, characterised in that an arrangement (44) for bending the material web (25) along the longitudinal centre axis thereof is arranged between embossing cylinder (27a) and severing-cut cylinder (38a), in particular an arrangement (44) having a plurality of guide means (45, 47a, 47b), in particular guide rollers, between which the material web (25) can be transported and which are arranged in such a way that they define a curved transport path (48), along which the material web (25) is guided.
6. The device as claimed in claim 5, characterised in that the arrangement (44) for bending the material web (25) has at least one first guide means (45), which is arranged in particular in the region of the longitudinal centre axis of the material web and presses against the underside of the material web, and also two guide means (47a, 47b), which are arranged in the region of the lateral longitudinal edges of the material web (25) and each press against the upper side of the material web.
7. The device as claimed in one or more of claims 5-6, characterised in that the severing-cut cylinder (38a) has severing knives (39) spaced apart from one another in the circumferential direction, wherein each severing knife (39) is assigned a driver segment (41), which is arranged ahead of the severing-cut cylinder in relation to the standard direction of rotation thereof and can transfer in each case the conveying forces onto the material web (25).
8. The device as claimed in one or more of claims 5-7, characterised in that an accelerator cylinder (50a) is arranged downstream of the severing-cut cylinder (38a), with which accelerator cylinder the individual blanks (26) can be removed from the material web (25), wherein the accelerator cylinder (50a) has at least one driver segment (53), with which conveying forces can be transferred onto the blank (26) during a partial rotation phase of the accelerator cylinder (50a), and at least one free segment (51, 52), which is directed to an embossed region of the blank (26) when the blank (26) is guided along the accelerator cylinder (50a) during another partial rotation phase of the accelerator cylinder (50a), in such a way that the free segment (51) does not contact the embossed region.

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