EP1620343B1 - Rotary folder comprising a cutting device for cross-cutting at least one web - Google Patents

Abstract

A rotary folder includes two cutting devices for cross-cutting at least a first web. The cutting devices are cutting or counter cylinders that can rotate together and that define gaps in conjunction with a conveying cylinder. A path of web conveyance runs through each of these gaps. The conveying cylinder or the cutting cylinders support at least one blade for cutting of a product from the webs. The conveying cylinder comprises a retaining device for retaining a cut-off signature and for conveying the signature through the respective gap. The conveying cylinder or the counter cylinders comprise thrust bearings that interact with the blade.

Description

The invention relates to a wheel folding apparatus with a cutting device for cross-cutting at least one material web according to the preamble of claim 1.

Such a Winder is z. B. used to dissect in a web-fed rotary printing machine printed paper webs with the cutting device into individual signatures and to fold the signatures.

Known Räderfalzapparate this type include Schneldvorrichtungen with a transport cylinder and a cutting cylinder, which are rotatable together and limit a gap through which passes a transport path for the material to be cut web. The cutting cylinder carries at least one knife which cuts off a signature from the material web as it passes through the gap.

The DE 2517 000 C2 shows a folding apparatus with a Punkturzylinder and a Schneidmesserzylinder, which form a single cutting gap.

The DE 35 27 710 A1 and the EP 0 627 310 A1 disclose folders in which two folding blade cylinder act together with a jaw cylinder. Each of these folding blade is assigned a single knife cylinder.

The invention has for its object to provide a Winder with a cutting device for cross-cutting at least one material web.

The object is achieved by the features of claim 1.

The closest prior art is the DE 191 7235 A1 represents.

The achievable with the present invention consist in particular in the fact that they allow the joining of two webs of material, which are supplied to the cutting gaps on two transport paths to a common product with little equipment expense and the processing of a web with a very large number of layers Joining of two partial webs allowed.

The processing of material webs composed of a large number of layers by means of a folding machine with a simple cutting gap, as in DE 25 17 000 C2 described difficulties for several reasons. On the one hand pull rollers, which are conventionally provided for setting a required tension of the material web, act only on the respective outer bristle layers of the material web directly; On the inner layers, their force is transmitted only indirectly by friction of the material layers to each other. These frictional forces are not exactly controllable, especially not when the web has to be steered around curves, ie wraps around a roller. Therefore, the larger the number of tracks, the less the tension of the inner layers of such a web is controllable. Also, the forces required to process a web, be it cutting or puncturing puncture holes in the web, are the greater, the greater the number of their layers. In the wheel folder according to the invention, a product having a given page number can be assembled from separately cut and needled part webs. Since the forces required to cut and possibly puncture these partial webs are smaller than the corresponding forces in the processing of a single web with the given page number, the Winder can be built without loss of quality easier and thus cheaper than a conventional.

Other advantages are that the cutting device, the risk of re-trimming already isolated signatures in another pass through a Eliminates cutting gap without requiring elaborate Verschiebungsvorrichtungen or unusually high precision in the control of the rotations of the individual cylinders of the cutting device.

In order to prevent the second cutting blade from again cutting into the first path when passing through the second cutting gap, the rotation of the two cutting cylinders is preferably synchronized so that the second cutting blade, as it passes through the second cutting gap, responds to a cut produced by the first cutting blade the first track meets.

In order to facilitate the making of this cut, means are preferably provided for disassembling the cut edges produced by the first knife when cutting the first web so that the second knife, as it passes through the gap, encounters a gap of non-disappearing width in the gap first track abuts.

In one embodiment of the Räderfalzapparates, wherein the cutting cylinder in the cutting device also performs the function of a transport cylinder for the isolated products, is a single signature, as long as it is held on the cutting or transport cylinder, between the two cutting blades, of which they cut It is sufficient that the cutting blades and the signature in this tent do not move with respect to each other to ensure that the signature is not re-cut on re-passage through a cutting nip.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

Fig. 1

a schematic side view of a part of a Winder with a Cutter;

Fig. 2 to

5 are partial sections of the transport cylinder and a cutting cylinder in different embodiments of the invention;

Fig. 6

a schematic side view of part of another embodiment of a Räderfalzapparats with a cutting device;

Fig. 7

an enlarged view of a detail of FIG. 6;

Fig. 8

a representation of a mode of operation;

Fig. 9

a representation of another mode of operation;

Fig. 10

Another embodiment of a Räderfalzapparates.

Fig. 1 shows a schematic side view of a part of a Räderfalzapparates. This Winder has two enemas 01; 02 for multi-layer material webs 03; 04, in particular paper webs 03; 04, hereinafter referred to as the inner or outer web 03; 04 are called. Both tracks 03; 04 each pass through a pair of draw rollers 06; 07 for adjusting their tension and meet a transport cylinder 11 in the amount of cutting gaps 08; 09 between the transport cylinder 11 on the one hand and one of the cutting cylinder 12; 13 on the other hand. Instead of two enema 01; 02 and two cutting gaps 08; 09, three or more may be provided. The tracks contact 03; 04 preferably each first the respective cutting cylinder 12; 13 and then the transport cylinder 11, d. H. the tracks 03; 04 first wrap around the cutting cylinder 12; 13 and then the transport cylinder 11th

Each cutting cylinder 12 or 13 has a circumference corresponding to at least one, preferably two lengths of the webs 03; 04 to be produced signatures 21; 27 and carries two cutting blades 14th

The circumference of the transport cylinder 11 corresponds to more than five, in particular seven lengths of the signature 21; 27. Sieving at equal intervals in the peripheral surface of the transport cylinder 11 counter cutting strips, z. B. hard rubber strips, serve as an abutment 33, each with the cutting of the webs 03; 04 cooperate with a cutting blade 14. Each of the abutment 33 is adjacent to a holding device 16, z. B. spur strip 16 with extendable puncture needles 23 (see FIGS. 2 to 5), arranged on the transport cylinder 11

In the position shown in FIG. 1, a cutting blade 14 of the cutting cylinder 12 and an abutment 33 of the transport cylinder 11 just pass through the cutting gap 08 and sever the inner web 03. The resulting during cutting leading edge of the inner web 03 is at the puncturing needles 23rd an impaled shortly before reaching the cutting gap 08 spud strip 16, which hold him firmly during further transport to the surface of the transport cylinder 11.

The thus cut off from the inner web 03 signature 21 is further promoted on the transport cylinder 11 to the cutting gap 09, where the outer web 04 puts it over and is also impaled by the puncturing needles 23 of the spur strip 16.

The rotation of the two cutting cylinders 12; 13 is synchronized so that a cutting blade 14 of the cutting cylinder 13 always at the same time with a small gap between two successive, cut from the inner web 03 signatures 21 and an abutment 33 passes through the cutting gap 09. Different techniques for generating this gap will be explained below with reference to FIGS. 2 to 5 The angular distance between the two cutting gaps 08; 09 is about 50 ° in the example shown here. This angular distance may differ from the distance between the effective distance of the sprocket bars 16 (51.5 °) or a multiple thereof, so that not at the two cutting gaps 08; 09 is cut simultaneously; even a half-integer multiple of this value is unfavorable from the viewpoint of vibration avoidance.

After passing through the cutting gap 09 each puncture strip 16 carries a total product, which is composed in each case of a cut off from the inner web 03 signature 21 and cut off from the outer web 04 signature 27. With each revolution of the transport cylinder 11 seven products are produced, as well as when both tracks 03; 04 in a conventional manner via a common inlet 01; 02 would be supplied. However, since the truncation of each signature 21; 27 on two cutting steps on the cutting gaps 08; 09 distributed, the force to be applied in each cutting step is lower, and a satisfactory synchronization of the machine is easier to maintain.

To the transport cylinder 11 are also two cylinders 17 and 18, in particular folding rollers 17 and 18, which together form a gap 19, in particular a folding gap 19, made contactless. On the transport cylinder 11 seven folding blades, not shown in Fig. 1 are mounted, which are respectively extended upon reaching the folding gap 19 between the transport cylinder 11 to transport the transport cylinder 11 products in a conventional manner with a desired, approximately centered on the Pages of the signatures 21; 27 lying fold line first in the folding gap 19 to press and so to fold. The folded products pass through the folding nip 19 and fall in a known manner on a not shown paddle wheel and are designed by this on a conveyor belt.

FIG. 2 shows a detailed view of the cutting gap 09 and its surroundings according to a first embodiment of the invention. Two of the seven spiked strips 16 of the Transport cylinder 11 are shown in FIG. 2 and with Punkturleisten 16 '; Designated 16 ''. Both are respectively pivotable about a shaft 22 and carry puncture needles 23 which are oriented so that their protruding from the circumference of the transport cylinder 11 tip is further removed from the center of the shaft 22 as their lying within the transport cylinder 11 base. The puncturing needles 23 of the spur strip 16 'are in a comparatively far extended position in which they have previously gone through the cutting gap 08. This same position is drawn at the location of the spur strip 16 '' dashed lines.

In comparison thereto, the spur strip 16 "is pivoted somewhat into the interior of the transport cylinder 11. This pivoting movement causes a displacement of the point of intersection between the spotting needles 23 and the surface of the transport cylinder 11 counter to its direction of rotation held signature 21 compared to the position in which it was cut at the cutting gap 08 of the inner web 03, slightly shifted against the direction of rotation of the transport cylinder 11. After passing through the fast gap 09, the spur strip 16 "returns to the position shown in the dashed line or even transitions to an even more extended position so as to cancel or overcompensate for the backward displacement of the signature 21. In this way, the signature is formed in each case 21 and an immediately before cut off signature 27 a narrow gap 26, in which the cutting blade 14 engage and so the outer web 04 can press against the abutment 33 and cut, without running the risk of again one of the signatures 21, 27 to cut.

Fig. 3 shows an alternative embodiment of the transport cylinder 11 and the cutting cylinder 13 in a partial section analogous to that of Fig. 2. The cutting cylinder 13 has for each cutting blade 14 on its outer circumference projecting bar 28 which the cutting gap 09 respectively shortly before associated cutting blade 14 goes through. A complementarily shaped groove 29 on the transport cylinder 11 is the bar 28 at each nip passage, so that the bar 28 a trailing edge portion of the cut off of the inner web 03 Signature 27 and the outer web 04 pushes into the groove 29 Thus, the trailing edge of Signature 27 is preferred and the gap 26 is opened. It is therefore not necessary in this embodiment that the Punkturteiste 16 "pivots outwards again after their passage through the cutting gap 09 to generate the gap 26.

A third embodiment is shown again in FIG. 4 on the basis of a partial section of the transport cylinder 11 and of the cutting cylinder 13. The cutting cylinder 13 is identical to that of FIG. 2, the transport cylinder 11 differs by the arrangement of the shafts 22 about which the spurs 16 are pivotable. While in the embodiments of Figs. 2 and 3, these waves 22 are in the direction of rotation of the transport cylinder 11 in front of the point needles 23, they are arranged in the embodiment of FIG. 4 behind this. The orientation of the puncturing needles 23 with respect to the surface of the transport cylinder 11 is the same in all cases, they are slightly inclined against the surface normal in the direction of rotation of the transport cylinder 11, so that acting on a spiked on the point needles 23 material tension this against the Surface of the transport cylinder 11 holds pressed.

From the changed arrangement of the shafts 22 results in a modified sequence of the pivoting movement here with 16 *; 16 ** designated puncture strips. The spur strip 16 *, which is still far away from the cutting gap 09, is in a comparatively slightly extended position, in which its point needles 23 extend far enough beyond the circumference of the transfer cylinder 11 to hold the inner web 03. Only shortly before reaching the cutting gap 09 is the spur strip 16 * extended further to also puncture the outer web 04, as can be seen on the spur strip 16 **. In this embodiment, the outward movement of the puncturing needles 23 causes a shift of their intersection with the circumference of the transport cylinder 11 against the Direction of movement and thus a departure of the leading edge of the held by the spur strip 16 ** signature 21 from the point of impact of the cutting blade 14 on the abutment 33. The puncture needles 23 of the spur strip 16 ***, however, a piece further retracted into the transport cylinder 11 to so as to advance the signature held by them 27 in the circumferential direction and thus to open the gap 26 in the amount of the abutment 33.

In this embodiment, several changes of direction in the movement of the puncturing needles 23 are avoided in the course of a revolution of the transport cylinder 11.

A fourth embodiment of the cutting device is again shown in FIG. 5 in a view analogous to FIG. 4.

In this embodiment, on the circumference of the transport cylinder 11 between two consecutive Punkturleisten 16 ', 16 ", 16' '', ... Segments 32 ', 32", ... arranged to increase the size. Each of these segments 32 ', 32' ', ... is composed of a plurality of flexible blades, which are arranged side by side in the axial direction of the transport cylinder 11 and spaced by gaps. These columns are used in the transfer of the finished cut signatures 21; 27 to the folding rollers 17; 19 each as outlet openings for prongs of a (not shown) folding blade. The ends of the slats are each anchored to the head strip 31 which is displaceable in the circumferential direction of the transport cylinder 11

The segment 32 'is in a configuration in which the course of its lamellae corresponds to the cylindrical shape of the transport cylinder 11. After passage of such a segment 32 'through the cutting gap 09, its head strips 31 are displaced toward each other, so that its lamellae, as shown on the segment 32 ", form a projection extending beyond the circumference of the transport cylinder 11. As a result of this projection, the lug is along the Surface of the transport cylinder 11 measured distance between the Punkturleisten 16 "and 16"'larger than that between the Punkturleisten 16' and 16 ", the latter corresponds to the length of the generated at the cutting gap 08 signatures 21, 27. The bulge of the segment 32" therefore causes between the signatures 21 and 27, the gap 26 is formed, in which the cutting blade 14 of the cutting cylinder 13 can engage.

The cutting cylinder 13 is arranged on the circumference of the transport cylinder 11 out of phase cutting.

The section of the cutting cylinder 12 on the transport cylinder 11 takes place next to, in particular 10 mm, next to the other section of the cutting cylinder 13.

The cutting cylinders 12 and 13 are arranged in the circumferential direction on the transport cylinder 11.

Fig. 6 shows a schematic side view of a part of an alternative embodiment of the Räderfalzapparats, in which the cutting blades 14 are arranged on the transport cylinder 11. The circumference of the cutting and transporting cylinder 11 corresponds to more than five, preferably seven lengths of the signature 21; 27. He wears uniformly distributed around its circumference more than five, preferably seven cutting blades 14 and, in its direction of movement (counterclockwise rotation in Fig. 1) just behind each cutting blade 14, a holding device 16, z. B. a spur strip 16. Such a spur strip 16 which is pivotable about a shaft 22 and carries point needles 23 is shown enlarged in Fig. 7 at the moment of their passage through the cutting gap 08 on the counter cylinder 34.

Each of the two identically constructed counter-cylinders 34 and 36 has a circumference corresponding to at least one, preferably two lengths of the webs 03; 04 to be produced signatures 21; 27. He wears at least one, preferably two in his Peripheral surface recessed counter cutting strips, z. B. Hartgummistreifen which serve as abutment 33 of the cutting blade 14 when cutting the webs 03 and 04, and in the direction of movement just behind each abutment 33, a groove 24 for receiving the passage through the cutting gap 08 or 09 over the circumference of the cutting and transport cylinder 11 extended tips of the puncturing needles 23 of the puncture 16th

In the position shown in Fig. 6, a cutting blade 14 of the cutting and transport cylinder 11 and an abutment 33 of the counter-cylinder 34 just pass through the cutting gap 08 and thereby sever the inner web 03. The resulting during cutting leading edge of the inner web 03 is connected to the Punkurnadeln 23 impaled a shortly before reaching the cutting gap 08 extended spur strip 16, which hold him firmly on the surface of the cutting and transporting cylinder 11 during further transport.

The thus cut off from the inner web 03 signature 21 is further promoted on the cutting and transport cylinder 11 to the cutting gap 09, where the outer web 04 lays over, also impaled by the puncturing needles 23 of the spur strip 16 and cut by the same cutting blade 14 becomes. Since the cutting blades 14 and the puncture strips 16 do not move between the passage through the cutting gap 08 and the passage through the cutting gap 09 with respect to the cutting and transporting cylinder 11, there is no danger that the cut off in the cutting gap 08 of the web 03 signatures 21 are cut again when passing through the cutting gap 09.

The tips of the puncturing needles 23 (see Fig. 7) are at the location of the cutting gaps 08 and 09 continue beyond the circumference of the cutting and transporting cylinder 11 before the cutting blades 14 to ensure that they have already pierced the web 03 and 04 before it is cut by the cutting blade 14.

The angular distance between the two cutting gaps 08; 09 is about 50 ° in the example shown here. This angular distance may differ from the angular distance of the spur strips 16 from each other (51.5 °) or a multiple thereof, so not at the two cutting gaps 08; 09 is cut simultaneously; even a half-integer multiple of this value is unfavorable from the viewpoint of vibration avoidance.

After passing through the cutting gap 09 each puncture strip 16 carries a total product which is composed in each case of signatures 21 cut off from the inner web 03 and signatures 27 cut off from the outer web 04. With each revolution of the cutting and transporting cylinder 11 seven signatures 21; 27 generates, as well as when both tracks 03; 04 in a conventional manner via a common inlet 01; 02 would be supplied. However, since the truncation of each signature 21; 27 to two cutting steps on the columns 08; 09 distributed, the force to be applied in each cutting step is lower, a satisfactory synchronization of the machine is easier to maintain, and also the demands on the mechanical strength of the cutting device are lower than when fed through a common inlet 01; 02.

On Schneld- and transport cylinder 11 at least five, preferably seven folding blades, not shown in the figure are mounted, which are each extended upon reaching a folding gap 19 between two not touching the cutting and transport cylinder 11 folding rollers 17 and 18, to those on the cutting - And transport cylinder 11 transported products in the folding gap 19 in a conventional manner to pass and fold. The folded products pass through the folding gap 19 and fall into a not shown paddle wheel and are designed by this on a likewise not shown, as known, conveyor belt.

It is possible that each of the tracks 03; 04 same pattern A or B in succession, d. H. has in the transport direction. These patterns A and B are preferably printed with at least one forme cylinder of a printing unit which carries on the circumference two identical patterns A or B. The tracks 03; 04 are superimposed, so that signatures arise with superimposed patterns A and B, which pass to the folding gap 19 respectively. For this purpose, the transport cylinder 11 does not necessarily have an odd-numbered division, but may also have an even division, preferably greater than 4 or 6.

Patterns A, B, C, D preferably each designate two newspaper pages, A1, A2; B1, B2; C1, C2; D1, D2 each denote a newspaper page. Under the name Bahn 03; 04 is at least one track 03; 04, but below is preferably one of several superimposed tracks 03; 04 existing strand to understand.

The tracks 03; 04 are each printed with printing cylinders of printing units that either wear a pattern A or B on the circumference (single circumference) or two patterns A and B on the circumference (double circumference) wear. For double-circumference form cylinders, two similar patterns A, A and B, B or two different patterns A, B may be circumferentially arranged.

There are therefore four modes of operation possible when using the invention.

In a first and second mode of operation both tracks 03; 04 merged before the first inlet 01 on the transport cylinder 11 and separated by a single cutting operation

The tracks carry 03; 04 in a first mode of operation in succession similar patterns A and C, as can be seen in Fig. 8, and it will be formed on the transport cylinder 11 in a row at each revolution the same products and delivered directly to the folding gap 19.

In a second mode of operation corresponding to a collection mode, the tracks 03; 04, as shown in FIG. 9, alternate patterns A, B and C, D, which are alternately deposited on the transport cylinder 11 during a first revolution of the transport cylinder 11 (= collecting cylinder) provided with an odd number of fields. Fields of the transport cylinder 11, which bear the signatures with the patterns A, C, pass through the two folding cylinders 17; 18, without the signatures are delivered. In a second pass of such a field at the inlet 01 it is additionally loaded with signatures with the patterns B, D. Only then all four signatures are delivered together to the folding gap 19.

In a third and fourth mode of operation, the two tracks 03; 04 separately fed through the enemas 01 and 02.

In the third mode of operation, the tracks 03; 04 according to FIG. 9 alternately one after the other pattern A, B or C, D.

In this case, a field of the transport cylinder at the inlet 01 with a signature with pattern A and at the inlet 02 with a signature with pattern C is loaded during a first revolution of the transport cylinder 11 (= collecting cylinder), so that every second spur strip 16 when passing the folding cylinder 17; 18 signatures with patterns A; C wears and the cylinders happens without giving the signatures. In a second revolution then again of each web 03; 04 two signatures with patterns B, D led to the spur strips 16.

In the second revolution of the transport cylinder 11, therefore, signatures of patterns A, C, B, D on the spurs 16 are alternating with spurs 16 bearing only signatures with patterns A, C, the finished products consisting of four signatures with patterns A , C, B, D of every other field are transferred to the folding nip 19.

In a fourth mode of operation, the tracks 03; 04 as in Fig. 8 successively the same pattern A, A and C, C, so that at each revolution of the transport cylinder 11 each spur strip 16 signatures with patterns A, C receives, which are passed directly to this when reaching the folding gap 19.

In a further embodiment, the transport cylinder 11 has three holding devices 16, preferably puncturing needle sets 16. There are two folding blades arranged These folding blades are rotatably mounted on a rotatable support within the lateral surface of the transport cylinder 11. This carrier is arranged eccentrically to the axis of rotation of the lateral surface of the transport cylinder 11 and rotates at a relative speed to the lateral surface of the transport cylinder 11. This transport cylinder 11 are associated with two cutting devices, so that circumferentially offset two arranged cutting gaps 08, 09 are present.

These cutting devices each have a rotatable cylinder 12, 13 and 34, 36, which is provided either with at least one cutting blade 14 or at least one abutment 33 for a cutting blade 14

Assign the cylinder 12, 13 cutting blade 14 are on the transport cylinder eleventh Counter bearing 33, preferably three, arranged ways, however, the cylinder 34, 36 abutment 33, are on the transport cylinder 11 cutting blade 14, preferably three, respectively

LIST OF REFERENCE NUMBERS

01

enema

02

enema

03

Web; Train, first; Track, inner; Paper web;

04

Material web, web, second; Track, outer; paper web

05

-

06

pair of drawing rollers

07

pair of drawing rollers

08

Cutting gap, first

09

Cutting gap, second

10

-

11

Transport cylinder, folding blade cylinder

12

Cutting cylinder, first; Counter cylinder, first

13

Cutting cylinder, second; Counter cylinder, second

14

cutting blade

15

16

Means, holding device, spur strip

17

Cylinder, folding roller

18

Cylinder, folding roller

19

Gap, seam gap

20

-

21

Signature, first

22

wave

23

Punlkurnadeln

24

groove

25

-

26

gap

27

Signature, second

28

strip

29

groove

30

-

31

Medium, segment, header

32

Medium, segment

33

abutment

34

Counter cylinder, first

35

-

36

Counter cylinder, second

Claims (27)

1. A tucker-blade folder with a cutting apparatus (11, 12, 13; 11, 34, 36) for the cross-cutting of at least one web of material (03; 04) with a conveying cylinder (11) and two folding rollers (17; 18) forming a folding gap (19), wherein the conveying cylinder (11) is arranged with a first anvil drum (12; 34) so as to form a first cutting gap (08), characterized in that the conveying cylinder (11) is additionally arranged with a second anvil drum (13; 36) so as to form a second cutting gap (09).
2. A tucker-blade folder according to Claim 1, characterized in that the anvil drum (12; 34) is in each case a cutting cylinder (12; 13).
3. A tucker-blade folder according to Claim 1, characterized in that the conveying cylinder (11) has abutments (33) for cutting blades (14) of the cutting cylinders (12; 13).
4. A tucker-blade folder according to Claim 1, characterized in that the first anvil drum (12; 34) co-operates with the conveying cylinder (11) to sever a first web of material (03), and the second anvil drum (13; 36) co-operates with the conveying cylinder (11) to sever a second web of material (04).
5. A tucker-blade folder according to Claim 1, characterized in that the anvil drums (12; 13; 34; 36) are arranged on the periphery of the conveying cylinder (11) so as to cut in a phase-offset manner.
6. A tucker-blade folder according to Claim 5, characterized in that on the conveying cylinder (11) the cutting in the first cutting gap (08) takes place closely adjacent to, and in particular at less than 10 mm, a cutting in the second cutting gap (09).
7. A tucker-blade folder according to Claim 1, characterized in that the anvil drums (12; 13; 34; 36) are arranged offset in the peripheral direction on the conveying cylinder (11).
8. A tucker-blade folder according to Claim 1, characterized in that a first conveying path for a first web of material (03) to be cut runs through the first cutting gap (08), wherein the first cutting cylinder (12) carries at least one cutting blade (14) for severing a first signature (21) from the first web of material (03) during the passage of the cutting blade (14) through the first cutting gap (08), a second conveying path for a second web of material (04) to be cut on the conveying cylinder (11) meets the first conveying path, and the two conveying paths extend through the second cutting gap (09), wherein the second cutting cylinder (13) carries at least one cutting blade (14) for severing a second signature (27) from the second web of material (04) during the passage of the cutting blade (14) through the second cutting gap (09).
9. A tucker-blade folder according to Claim 8, characterized in that the rotation of the two cutting cylinders (12; 13) is synchronized in such a way that during its passage through the second cutting gap (09) the cutting blade (14) meets a cutting produced by the cutting blade (14) in the first web of material (03), which cutting was carried out in the first cutting gap (08).
10. A tucker-blade folder according to Claim 9, characterized by means (16; 16'; 16"; 16*; 16**; 16***; 31; 32'; 32") for moving apart the cutting edges produced on the first web of material (03) by the first cutting blade (14) during the cutting of the said first web of material (03).
11. A tucker-blade folder according to Claim 10, characterized in that the means (16; 16'; 16"; 16*; 16**; 16***; 31; 32'; 32") for moving apart the cutting edges comprise a retaining device (16"; 16***) for retaining the cut first signature (21) and for displacing the first signature (21) in a direction opposed to the conveying direction before reaching the second cutting gap (09).
12. A tucker-blade folder according to Claim 10 or 11, characterized in that the means (16; 16'; 16"; 16*; 16**; 16***; 31; 32'; 32") for moving apart the cutting edges comprise a retaining device (16"; 16***) for retaining the cut second signature (27) and for displacing the second signature (27) in the conveying direction after passing through the second cutting gap (09).
13. A tucker-blade folder according to Claim 1, characterized in that the conveying cylinder (11) carries at least one cutting blade (14).
14. A tucker-blade folder according to Claim 13, characterized in that the anvil drums (12; 13; 34; 36) have one abutment (33) co-operating with the cutting blade (14) in each case.
15. A tucker-blade folder according to Claim 13 or 14, characterized in that a first conveying path for a first web of material (03) to be cut extends through the first cutting gap (08), a second conveying path for a second web of material (04) to be cut on the conveying cylinder (11) meets the first conveying path, and the two conveying paths extend through the second cutting gap (09).
16. A tucker-blade folder according to Claim 1, characterized by a first anvil drum (34) which is rotatable jointly with the conveying cylinder (11) and which bounds the first cutting gap (08), through which a first conveying path for the first web of material (03) extends, wherein the conveying cylinder (11) carries at least one cutting blade (14) for severing a signature (21) from the first web of material (03) during the passage of the cutting blade (14) through the first cutting gap (08), and the anvil drum (34) has an abutment (33) co-operating with the cutting blade (14), wherein the conveying cylinder (11) comprises a retaining device (16) for retaining a cut signature and for conveying the signature through the first cutting gap (08), and the first conveying path passes around the first anvil drum (34) in the inlet of the first cutting gap (08).
17. A tucker-blade folder according to Claim 10, 11, 12 or 16, characterized in that the retaining device (16; 16'; 16"; 16*; 16**; 16***) is a pin strip (16; 16'; 16"; 16*; 16**; 16***).
18. A tucker-blade folder according to Claim 17, characterized in that the pin strip (16; 16'; 16"; 16*; 16**; 16***) carrying pins (23) is pivotable about a shaft (22), and the pins (23) cross the periphery of the conveying cylinder (11) at a location which is variable in a manner corresponding to the pivoting position of the pin strip (16; 16*).
19. A tucker-blade folder according to Claim 12 and Claim 17, characterized in that the pin strip (16; 16'; 16"; 16*; 16**; 16***) carrying pins (23) is pivotable about a shaft (22), and the tips of the pins (23) are at a greater distance from the shaft (22) than their bases.
20. A tucker-blade folder according to any one of Claims 10, 11, 12 or 16 to 19, characterized in that the means (16; 16'; 16"; 16*; 16**; 16***; 31; 32'; 32") for moving apart the cutting edges comprise a radially displaceable segment (31; 32'; 32") of the conveying cylinder (11) and a control apparatus for driving an outward movement of the segment (31; 32'; 32") after passing through the second cutting gap (09).
21. A tucker-blade folder according to any one of Claims 10, 11, 12 or 16 to 20, characterized in that the means (16; 16'; 16"; 16*; 16**; 16***; 31; 32'; 32") for moving apart the cutting edges comprise a channel (29) on the conveying cylinder (11) and a strip (28) co-operating with the channel (29) on the second cutting cylinder (13).
22. A tucker-blade folder according to any one of Claims 17 to 21, characterized in that the first anvil drum (34) has at least one groove (24) for receiving pins (23) of the pin strip (16).
23. A tucker-blade folder according to Claim 13, 14 or 15, characterized in that the first conveying path for a first web of material (03) to be cut passes around the first anvil drum (34) in the inlet of the first cutting gap (08).
24. A tucker-blade folder according to Claim 1, characterized by a first anvil drum (34) which is rotatable jointly with the conveying cylinder (11) and which bounds the first cutting gap (08), through which a first conveying path for the first web of material (03) extends, wherein the conveying cylinder (11) carries at least one cutting blade (14) for severing a signature (21) from the first web of material (03) during the passage of the cutting blade (14) through the first cutting gap (08), and the anvil drum (34) has an abutment (33) co-operating with the cutting blade (14), wherein a second conveying path for a second web of material (04) to be cut on the conveying cylinder (11) meets the first conveying path, and a second anvil drum (36) is rotatable jointly with the conveying cylinder (11) and which with the said conveying cylinder (11) bounds a second cutting gap (09), through which the two conveying paths extend, wherein the second anvil drum (36) carries an abutment (33) which co-operates with the cutting blade (14) during the passage of the cutting blade (14) through the second cutting gap (09) in order to sever a second signature from the second web of material (04).
25. A tucker-blade folder according to any one of the preceding Claims, characterized in that the conveying cylinder (11) has at least five, and preferably seven, fields.
26. A tucker-blade folder according to any one of the preceding Claims, characterized in that an inlet (01; 02) is associated with each web of material (03; 04).
27. A tucker-blade folder according to any one of the preceding Claims, characterized in that the conveying cylinder (11) is constructed in the form of a foldingblade cylinder (11).

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