EP1282516A2

EP1282516A2 - Folding device

Info

Publication number: EP1282516A2
Application number: EP01943080A
Authority: EP
Inventors: Rudolf Phillip ÖCHSNER; Rudolf Stäb
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2000-05-17
Filing date: 2001-05-16
Publication date: 2003-02-12
Anticipated expiration: 2021-05-16
Also published as: WO2001087601A2; CN1441724A; CN1221384C; AU2001265787A1; JP3983547B2; WO2001087601B1; WO2001087601A3; EP1282516B1; US20040053763A1; ATE304942T1; DE50107503D1; US6902519B2; RU2250832C2; JP2003533417A

Abstract

A folding device for use with a rotary printing press includes a folding-jaw cylinder and a folding blade cylinder. The folding blade cylinder is movable with respect to the folding-jaw cylinder between a working position where it cooperates with the folding-jaw cylinder and a rest position where it is moved away from the folding-jaw cylinder.

Description

description

folding

The invention relates to a folder of a rotary printing press according to the preamble of claim 1 or 14.

From DE 195 09 947 A1 and DE 19525169 C2 folders for a rotary printing press are known which have a jaw cylinder and a folder cylinder which interacts with the jaw cylinder. A disadvantage of these folders is that the product management is complicated. For example, a signature coming from a cutting groove cylinder must first be transferred to a folding jaw cylinder and from there to a cross folding cylinder before it reaches a belt guide system that conveys the product to a delivery arm. The cross-folding cylinder of these folders must always run in production, even if it is not used to produce a cross-fold, since it is required to convey the signatures. Transmission or transfer errors between the cylinders can lead to so-called "paper stoppers" which can result in damage to the cylinders.

DE 43 18 133 A1 describes a folder which optionally produces products with a transverse fold in a first operating mode and products with an additional second transverse fold in a second operating mode. For this purpose, a first and a second folding knife cylinder are arranged, the signatures of the products of the second folding knife cylinder optionally being stripped off by means of tapes.

DE 36 36244 C2 discloses a folder with a pivotable stapling cylinder, which optionally interacts with a first or second jaw cylinder.

The invention has for its object to provide a folder. The object is achieved by the features of claim 1 or 14.

The advantages which can be achieved with the invention consist in particular in that damage to the folder by paper tampers is avoided and that the accessibility of the parts of the folder for maintenance purposes is simplified.

In addition, by decommissioning unnecessarily moving cylinders, the folder is to be made more energy-efficient, less prone to wear and less noise.

A modular construction of the folder is made possible by the fact that the displaceable folding cylinder is mounted between two side parts which can be pivoted against the side frames of the folder. The use of a specially assigned motor for driving the displaceable folding cylinder enables its movement to be decoupled from vibrations which are caused in the folder by variably loaded other rotationally driven parts such as a cutting or puncturing roller.

Another advantage of using the specially assigned motor is that, unlike in the case of a joint drive of the folding cylinder and folding jaw cylinder by tooth engagement, the phase position of the folding cylinder relative to the folding jaw cylinder interacting with it can be changed in a simple manner by suitable control of this motor. In particular, a coupling of the rotation of the motor to the width of the folding jaw gap can be provided in such a way that a folding knife of the folding cylinder engages centrally in the width of the folding jaw gap in the latter. The folder is therefore very easy and quick to adapt to the processing of signatures of different thicknesses.

Another advantage is that there is no second cross fold It has a significant influence on the design of the basic unit of the folder, that the otherwise usual bearing bores and the oil space required for the gear drive are eliminated and do not require an increase in the frames of the folder.

According to a preferred embodiment, the folder furthermore has a stationary folding cylinder. The stationary folding cylinder can then be used to produce a first transverse fold on the product, whereas the displaceable folding cylinder can be used to produce a second transverse fold. During e.g. B. usually a large part of the edition of daily newspapers, which is intended for subscription or for sale on the street, is produced with a single cross fold, a second cross fold is required for that part of the edition intended for mailing Bring newspaper to a format that can be used for mailing. The folder according to the invention allows the newspaper to be produced with or without a second transverse fold, the displaceable folding cylinder being pivoted into the rest position for the support part without a second transverse fold, and its drive can be switched off while the folder is running.

Furthermore, in a folder with two folding cylinders, it is preferred that the folding jaw cylinder has pairs of folding jaws, the second folding jaw of a pair each interacting with another folding cylinder. This allows a simplification of the product management, because with such a configuration, a signature can be picked up by a holding device of one of the two folding cylinders and the signature can be folded into the gap of the first folding jaw with the help of the folding knife of the folding cylinder and transferred to the folding jaw cylinder; the product folded in this way can then be pressed into the gap of the second folding flap of the pair by a folding knife of the other folding cylinder and thus obtain its second transverse fait without a transfer to another cylinder being necessary for this. The finished folded product can therefore be transferred directly from the folding jaw cylinder to a belt guide system or the like, and product promotion is simplified.

In order to enable a central fold in products of different formats, the two columns of the two pairs of folding jaws working together are expediently adjustable in the circumferential direction. The grippers are adjusted to the same extent in the folding cylinder.

Embodiments of the invention are shown in the drawings and are described in more detail below.

Show it:

Figure 1 is a schematic section through a folder according to the invention in a first phase of the folding process.

Fig. 2 is a partial section corresponding to that of Figure 1 in a second phase of the folding process.

FIG. 3 is a partial section corresponding to FIG. 2 in a third phase of the folding process;

4 shows a partial section of the folding apparatus with a folding cylinder displaced into an idle position;

5 shows a guide or pressure element;

6 shows a gripper regulation or folding jaw regulation in axial section;

Fig. 7 is a partial side view of the folder; 8 shows a schematic representation of the drive of the displaceable folding cylinder;

9 shows a further development of the folder in a partial section corresponding to FIG. 4.

Fig. 1 shows a schematic section of a folder of a rotary printing press. A web 1 coming into the folder from a folder (not shown) or a strand consisting of several webs first passes through a pair of drawing rollers 2 and then reaches a nip 3 between a cutting cylinder 4 and a stationary first folding knife cylinder 7. The cutting cylinder 4 carries on its circumference knives that interact with knife grooves of the first folding knife cylinder 7 and cut the web 1 into individual signatures. The individual signatures are captured by a holding device of the first folding knife cylinder 7, such as a gripper or point changing, and the signature is thus guided in the counterclockwise direction of the figure between the first folding knife cylinder 7 and a first guide plate 6 encompassing the lower region of the first folding knife cylinder 7.

The first guide plate 6 ends in the vicinity of a gap 8 between the first folding knife cylinder 7 and a folding jaw cylinder 9. This folding jaw cylinder 9 has a number of first folding jaws 11 on its circumference, which are evenly spaced apart from one another in the circumferential direction. In the example shown in FIG. 1, the jaw cylinder 9 has three first jaws 11 at an angular distance of 120 °. The distance between two first folding jaws 11, measured on the circumference of the folding jaw cylinder 9, corresponds to the length of an unfolded signature. The first folding jaws 11 each have a strip-shaped jaw 12 which is stationary on the folding jaw cylinder 9 and a jaw 13 which can be pivoted and is coupled to the rotational movement of the folding jaw cylinder 9. The coupling of the movement of the pivotable jaw 13 to the rotation of the jaw cylinder 9 is not carried out with the aid of one in FIG. 1 shown cam. This opens the gap of the first folding jaw 11 shortly before it reaches the gap 8, so that a folding blade mounted on the first folding blade cylinder 7 during the passage through the gap of the first folding jaw 11 has the signature carried by the first folding blade cylinder 7 into the gap of the first folding jaw 11 can push in. This creates a first, central cross fold on the signature. While the folding knife of the first folding knife cylinder 7 is withdrawn after passage through the gap 8, the jaws 12 close; 13 of the first folding jaw 11, so that the signature gets stuck in the first folding jaw 11 and is thus taken over by the folding jaw cylinder 9 and transported further.

Up to this point, the operation of the folder corresponds to that of conventional folders, which is why a more detailed illustration of the cutting cylinder 4 and the first folder cylinder 7, also in FIG. 1, can be dispensed with.

A second guide plate 14 closes the outlet gusset of the second gap 8. It serves to fold over the front half of the signature released by the holding device of the first folding knife cylinder 7, so that the signature is further conveyed by the folding jaw cylinder 9 with the fold ahead. 1 shows a signature, designated 16, at this stage of processing, the formerly leading part 17 of the signature 16 brushing against the second guide plate 14.

A second guide plate 14 is followed by a guide or pressure element 18, the structure of which is shown in more detail in FIG. 5 and will be described later. This guide or pressure element 18 is located in the entrance gusset of a third gap 10, which is defined between the jaw cylinder 9 and a second jaw cylinder 19. This second folding knife cylinder 19 has two diametrically opposite holding devices on its circumference, here in the form of grippers 21. Since the number of grippers 21 or folding knives 22 is smaller than that of the first folding jaws 11, the diameter of the second folding knife cylinder 19 is also im Ratio smaller than that of the folding jaw cylinder 9. This facilitates the arrangement of the two folding blade cylinders 7; 19 and a belt guide system 27 described later on the circumference of the jaw cylinder 9.

In the phase of the folding process shown in FIG. 1, one of these two grippers 21 is just about to take over the signature 16 in the region of its first transverse fold from the opening first folding flap 11. The second folding knife cylinder 19 also carries two folding knives 22. The distance between the gripper 21 and the subsequent folding knife 22 on the second folding knife cylinder 19 is adjustable and is expediently set to a quarter of the length of the signature 16 in order to use the folding knife 22 to make a second transverse fold in the insert signature 16 folded once in the middle.

The circumference of this second folding knife cylinder 19 can have a plurality of holding devices located at equal distances from one another, here in the form of grippers 21 and with the number 2. In the same way as that of the holding devices, the folding knives are also placed, according to the format length, equidistant from the holding devices , The smaller the number of holding devices or folding knives, the smaller the design of the second folding knife cylinder can be made. In the smallest case, a holding device and 1 folding knife can also be present.

The phase of generating the second transverse fold is shown in FIG. 2 with the aid of a partial section of the folder. In this phase, the first transverse fold of the signature 16 is lifted off the surface of the jaw cylinder 9 by the gripper 21; the first jaw 11 is empty and open. A second folding jaw 23 is arranged on the circumference of the folding jaw cylinder 9 at a distance from the first folding jaw 11, which corresponds to the distance between the gripper 21 and the folding knife 22 on the second folding knife cylinder 19. The distance between the first and second folding jaws 11 and 23 is also adjustable. The folding knife 22 presses the signature 16 into the open gap of the folding flap 23 and the signature 16 is clamped into the gap. At the same time, the gripper 21 releases the first transverse fold of the signature 16.

Guide brushes 24 are arranged in the exit gusset of the gap between the second folding knife cylinder 19 and the folding jaw cylinder 9. As can be seen in FIG. 3, they serve to pivot the two legs of the signature 16, which is now double-folded, against the surface of the jaw cylinder 9 and thus to complete the folding process. The finished product 26 after passing through the gap between the guide brushes 24 and the jaw cylinder 9 can be seen in FIG. 2.

A belt guide system 27, shown schematically in FIG. 1, with belts 29 guided around rollers 28 takes over the product 26, which is released approximately in its position shown in FIG. 2 by the second folding flap 23, and feeds it to a paddle wheel 31, which the Product 26 is deposited in a conventional manner on a belt delivery 32, the guide tongues 100 being pivoted at a distance from the stop 101 which corresponds approximately to the length of the product 26.

Together with the guide or pressure element 18 and the guide brushes 24, the second folding knife cylinder 19 forms a modular unit which can be shifted from the working position of the second folding knife cylinder 19 shown in FIGS. 1 to 3 into an idle position, which is shown in FIG. 4. In this idle position, the second folding knife cylinder 19 is pivoted by an angle of approximately 105 ° about an axis 33 against the working position, instead a third guide plate 34 is pivoted onto the folding jaw cylinder 9 and thus forms a continuous guide gap 36 for the signature 16, which is extends essentially without interruption from the second guide plate 14 to a guide body 37 and further to the first roller 28 of the belt guide system 27. In this way, the third baffle 34 prevents the freshly folded signature 16 unfolds on its way from the end of the second guide plate 14 to the tip of the guide body 37 when the second folding knife cylinder 19 is in its idle position. The guide tongues 100 are pivoted away from the stop 101, which corresponds approximately to the length of the product 26.

Thus, by simply swiveling the assembly formed from guide or pressure element 18, second folding knife cylinder 19 and guide brushes 24, it is possible to switch between production with single and double transverse folds. Since the second folding knife cylinder 19 no longer has a transport function in production with a simple transverse fold, its drive can be switched off in the idle position, even when the folder is working.

Fig. 5 shows in detail the structure of the guide or pressure element 18. It comprises a carrier 38 which is fixedly connected to a (not shown) side part (74, see Fig. 7), which is also a holder for the axis 33 of the forms second folding knife cylinder 19 and carries the guide brushes 24. A pivot arm 39 articulated to the carrier 38 carries a rotatable roller 41 at one end and two bores for a screw 42 and a set screw 43 at the other end. The set screw 43 is axially adjustable and has a tip 44 opposite the carrier 38. This tip 44 forms a stop which limits a pivoting movement of the roller 41 in the counterclockwise direction in FIG. The screw 42 extends through a bore in the carrier 38 and carries at its distal end two knurled nuts 46; 47, of which one knurled nut 46 is used to adjust the pivoting freedom of movement of the roller 41 and the other knurled nut 47 is used to counter the first knurled nut 46. A spring 48, e.g. B. a coil spring 48 exerts a clockwise torque on the swivel arm 39.

The setting of the threaded pin 43 specifies the maximum distance by which the roller 41 can move away from the latter by pivoting the swivel arm 39 when a signature 16 passes between it and the jaw cylinder 9. This maximum The distance is expediently set to a value which, with slight play, corresponds to the expected thickness of the signature 16, which is simply folded transversely. If, in the case of a paper tamper, the thickness of the signature 16 is greater and the roller 41 is pressed upward by the amount specified by the threaded pin 43, the entire assembly is pivoted upward out of the working position, and damage to the sensitive moving parts of The folding jaw cylinder 9 and the second folding blade cylinder 19 are avoided.

Alternatively, a servomechanism can also be provided which measures the force transmitted from the roller 41 to the carrier 38 and, when a limit value is exceeded, drives an actuator in order to pivot the second folding knife cylinder 19 out of its working position.

As shown in FIG. 7, the folding knife cylinder 19 can also be pivoted on and off via the electric motor 73, which acts on the axis 33, and holds the folding knife cylinder 19 in the working position with an electrical standstill torque against the gas pressure spring 75, by torque limitation in the event of overload the swiveling can be triggered by a paper jam.

In the event of a power failure, the gas pressure spring 75 alone takes over the function of lifting off, in order to achieve a safety distance between the folding jaw cylinder 9 and the folding blade cylinder 19, which protects the gripper 21 and the folding blade 22, even at the time of exiting. Until the point of departure, the synchronous braking is fed from the intermediate circuit via the voltage that is still present.

A second task of the guiding or pressing element 18 is to ensure that the signature 16 is guided with little friction. Due to its rotatability, the roller 41 exerts a substantially lower friction on a continuous signature 16 than would be the case with an immovable guide plate such as the guide plate 14. Therefore work at the moment the transfer of the first transverse fold to the gripper 21 of the second folding knife cylinder 19, at most, small braking friction forces on the signature 16, which simplifies the transfer and improves its accuracy.

As already stated, in the jaw cylinder 9, the first and second jaws 11; 23 and in the second folding knife cylinder 19 the grippers 21 and the folding knife 22 are adjustable at a distance from one another. Fig. 6 shows a schematic section of a structure of a rotatable suspension through which such an adjustment can be controlled. The construction is described here with reference to the folding jaw cylinder 9, but can be transferred to the second folding blade cylinder 19. The suspension comprises a flange 50 which is fastened on one of its end faces, here the inner end face 49, to a side frame 51 of the folder. A cylindrical extension 52 engages through an opening in the side frame 51 into the interior of the folder; A spindle 53 is guided in an axial bore of the extension 52. The spindle 53 has a thread 54 on its end pointing into the interior of the folder, on which a nut 56 rides. A locking pin 57 rigidly connected to the nut 56 engages in a blind hole 58 of the extension 52. The nut 56 is thereby held in a rotationally fixed manner, but can be moved back and forth in the axial direction by rotating the spindle 53.

The mother 56 carries on its outer circumference a bearing 59, for. B. a deep groove ball bearing 59. Via the deep groove ball bearing 59, axial positioning forces are exerted by the nut 56 on a rotatable adjusting drum 61; 77 transferable. The adjusting drum 61; 77 is also supported on the outer circumference of the extension 52 via an axially displaceable bearing 62, for example a needle bearing. The adjusting drum 61; 77 has two helical gears 63 on its outer circumference; 64; 82; 83 with different helix angles. The two helical gears 63; 64; 82; 83 engage in two sprockets 66; 67; 84; 86 a, of which a ring gear 67; 86 carries the outer surface of the jaw cylinder 9 and the first jaws 11 firmly connected to the outer surface; the other ring gear 66; 84 is connected to the adjustable second folding jaws 23.

A rotation of the spindle 53 brings about an axial displacement of the adjusting drum 61; 77 and thus one depending on the helix angle of the helical gears 63; 64; 82; 83 different rotation of the two ring gears 66, 67; 84; 86 relative to each other. The stroke of the rotation depends on the difference in the helix angle and the diameter of the jaw cylinder 9. A stroke of a few centimeters in relation to the circumference of the jaw cylinder 9 is completely sufficient for most practical applications.

In order to achieve the radian between the jaws 11 and 23 and that between the grippers 21 and the folder 22 at the same time and in the correct ratio, both adjustments Fig. 6 (meshing with the jaw cylinder 9 and the folder cylinder 19) with an actuator on the spindle 53 acts equipped.

An adjustable stop 78 is attached to the side frame 51 at two points away from the axis 33. While the contact of the side part 74 with the stop 78 activates the working position of the second folding knife cylinder 19, the contact of the side part 74 with the stop 80 triggers the rest position of the second folding knife cylinder 19.

With the aid of the stop 78, the position of the second folding knife cylinder 19 relative to the folding jaw cylinder 9 in the working position can be set independently of the positioning accuracy of the electric motor 73 or the reduction gear.

The stops 78 and 80 also contain an initiator or switch which, when in contact with the side part 74 on the electric motor 73, triggers a stop and releases other drive motors on the folder again, including the second electric motor 76. A contactless state of the side part 74 to the stops 78 and 80, apart from the electric motor 73, triggers a stop in all the drive motors in the folder, including the second electric motor 76.

As also described elsewhere, in the working position of the second folding knife cylinder 19, the electric motor 73 exerts a pressure on the stop 78 and on the gas pressure spring 75 via a predetermined standstill moment, which is thus pressed and represents a counterforce. If, as a result of a paper jam, the pressure between the two cylinders 9 and 19 becomes too great and there is a risk of machine damage, the standstill torque on the electric motor 73 is overcome. The electric motor 73 comes into action and lifts the second folding knife cylinder via the transmission and with the aid of the gas pressure spring 75 19 up from the work area. All the motors on the folder, including the second electric motor 76, are stopped.

Fig. 7 shows a schematic side view of part of the folder. An upper edge 68 of the side frame 51 of the folder can be seen. The cutting cylinder 4, the first folding blade cylinder 7, the folding jaw cylinder 9, the belt guide system 27 and the paddle wheel 31 are arranged between the side frame 51 and an opposite side frame, not shown. The circumference of the folding jaw cylinder 9, which is itself covered by the side frame 51 in FIG. 7, is indicated by a dashed line 71. A housing 72 with an electric motor 73 is mounted on the upper edge 68. The housing 72 contains e.g. B. a reduction gear for transmitting the driving force of the electric motor 73 to the axis 33, about which, as already explained, the second folding blade cylinder 19 is pivotable from its working position into the idle position. The second folding knife cylinder 19 is rotatably mounted between two side parts 74, one of which can be seen in the figure, namely the side part is shown in the working position by a solid outline and in the idle position by a dashed outline; the axis 33 is firmly connected to both side parts 74. On the side of the side part 74 facing away from the viewer is a through a dashed outline indicated second electric motor 76 which is mounted by a pinion 81, via a likewise indicated dashed drum 61; 77 rotates the second folding knife cylinder 19. The guide or pressure element 18 and the guide brushes 24 are also mounted between the two side parts 74.

The elements 74, 76, 77, 78, 18, 19 and 24 mentioned form together with the housing 72 and the electric motor 73 an independent module which can be removed from the folder when not in use. This modular construction also makes it possible to build simple and inexpensive folders which lack the module but which are equipped for the subsequent assembly of such a module. This enables a printer to keep investment in a folder low as long as there is no need for double cross fold products; If this need arises, the folder can be made suitable for production with a double cross fold by purchasing the module in an inexpensive and simple and space-saving manner.

A control circuit (not shown) controls the rotary movement of the second electric motor 76 and thus that of the second folding blade cylinder 19 exactly in synchronization with the rotating movement of the folding jaw cylinder 9. It regulates the relative phase position of the folding jaw cylinder 9 and the second folding blade cylinder 19 taking into account those on the second folding jaws 23 to accommodate the signature width of the gap 16 set, so that it is ensured that a folding knife 22 of the second folding knife cylinder 19 always meets the center of an assigned folding jaw gap.

8 shows the drive of the second folding knife cylinder 19 in a highly schematic manner. The second electric motor 76 drives a pinion 81 via a clutch 79, which serves to shield the second electric motor 76 against irregularities in the rotational movement of the downstream transmission. In addition to the pinion 81, this transmission comprises the actuating drum 61; 77. How can be seen in Fig. 8, this adjusting drum 61; 77 two helical gears 63; 64; 82; 83, of which only one helical toothing 82 meshes with the pinion 81. The structure of the adjusting drum 61; 77 corresponds to the structure described with reference to FIG. 6: the toothings 82; 83 are helical gears with different helix angles as the helical gears 63; 64, and they are axially displaceable by a mechanism which can be driven by means of a rotating spindle. The axial displacement causes an angular offset between two gear wheels 84; driven by the helical gears 82, 83; 86 adjustable. The gear wheel 84 drives the rotary movement of the folding blades 22 via a hollow shaft 87 and two arms 88 which can be seen more precisely in FIG. 1 and which are connected to one another in the axial direction by means of crossbeams 90; the gear 86 drives the rotation of the casing of the second folding blade cylinder 19 and the gripper 21 via a shaft 89 which is guided through the hollow shaft 87.

The figure also schematically shows swivel arms 69, each of which is connected to one of the folding blades 22 or grippers 21 and rolls on cam disk 70 which is fixedly connected to one of the side parts 74, and thus an opening and closing movement of the respective coupled to the rotational position of the second folding blade cylinder 19 Ensure gripper 21 or pivoting movement of the folding knife 21.

For the rotary drive of the spindle 53 on the jaw cylinder 9 and the functionally identical spindle of the adjusting drum 61; 77, coupled electric motors can be provided in each case, the coupling ensuring that the distances between the first and second folding jaws 11; 23 on the one hand and between grippers 21 and folding blades 22 on the other hand is always varied to the same extent.

FIG. 9 shows a further development of the folding apparatus in a partial section analogous to that of FIG. 4. Components that have already been described with reference to FIGS. 1 to 8 have the same reference symbols here and will not be described again. The second folding knife cylinder 19 is located in FIG Idle position in which there is a wide space 95 between it and the jaw cylinder 9. A belt guide system 91 has two movable rollers 92; 93 which, when the second folding knife cylinder 19 is in the working position, are in an inactive position (not shown) behind the guide brushes 24 and which are coupled to the position of the second folding knife cylinder 19 in such a way that they pivot when the second folding knife cylinder is pivoted 19 move into its idle position against the transport direction of the signature 16 on the jaw cylinder 9 into the positions shown in FIG. 9 in the direction of the arrow 94. Another roller 96 of the belt guide system 91 can be displaced transversely to the general orientation of the belt guide system 91 in the direction of the arrow 97 against a spring force in order to prevent the rollers 92; 93 guided belt 98 regardless of the position of the rollers 92; 93 to keep it taut. In the position of the belt guide system 91 shown in FIG. 9, this belt 98 touches the circumference of the folding jaw cylinder 9 on that part of its circumference where the first folding jaws 11 open in order to release the signature 16 conveyed from the inside. The guide body 37 is pivotally suspended and, under the pressure of the belt 98, touches the surface of the jaw cylinder 9. The signature 16 released by the first jaw 11 is thus lifted from the jaw cylinder 9 by the guide body 37 and further conveyed between the guide body 37 and the belt 98 , A second band 99 of the band guide system 91 connects to an end of the guide body 37 which is at the rear in the transport direction. Between the two bands 98; 99, the signature 16 is conveyed to the input of a folding device (not shown) for producing a second longitudinal fold. The embodiment of FIG. 9 thus enables, depending on the position of the second folding knife cylinder 19, the generation of a second transverse fold or a second longitudinal fold on the product 26.

A further development, not shown in a separate figure, includes both the pivotable third guide plate 34 from FIG. 4 and the belt guide system 91 from FIG. 9. In this embodiment, the movement of the rollers 92; 93 both to the Pivoting movement of the folding knife cylinder 19 and the movement of the third guide plate 34 are coupled. This coupling means that, when the second folding knife cylinder 19 is in its idle position, either the guide plate 34 can be folded against the folding jaw cylinder 9, as shown in FIG. 4, or the band guide system 91 engages in the intermediate space 95. With this configuration, production is therefore possible with either a single transverse fold, with a double transverse fold or with a single transverse and second longitudinal fold.

LIST OF REFERENCE NUMBERS

1 lane

2 pull rollers

3 gap

4 cutting cylinders

5 -

6 baffle, first

7 folding knife cylinder, first

8 gap

9 jaw cylinder

10 gap

11 jaw, first

12 cheek

13 cheek

14 baffle, second

15 -

16 signature

17 part (16)

18 guide or pressure element

19 folding knife cylinder, second

20 -

21 grippers

22 folding knife

23 jaw, second

24 guide brushes

25 -

26 product

27 conveyor control system Roller belt - paddle wheel belt boom axis guide plate, third - guide gap guide body carrier swivel arm - roller screw grub screw tip - knurled nut knurled nut spring, spiral spring end faces flange side frame extension spindle thread - nut Anti-rotation pin blind hole Bearings, deep groove ball bearings - high-helix bearings helical teeth helical teeth - ring gear ring gear upper edge of swivel arm cam disc line, dashed line housing electric motor, first side parts gas spring electric motor, second actuating drum stop coupling stop pinion helical gear helical teeth helical gear - 86 gear

87 hollow shaft

88 arm

89 wave

90 -

91 Belt guide system

92 roll

93 roll

94 arrow

95 space

96 roll

97 arrow

98 volume

99 volume

100 guide tongue

101 stop

Claims

Expectations

1. folding apparatus with at least one folding jaw cylinder (09) and a folding blade cylinder (19) interacting in a working position with the folding jaw cylinder (09), characterized in that the folding blade cylinder (19) can be displaced from the working position into a rest position.

2. Folding apparatus according to claim 1, characterized in that the displaceable folding knife cylinder (19) is mounted between two side parts (74) which can be pivoted against side frames (51) of the folding apparatus which carry at least the folding jaw cylinder (09).

3. Folding apparatus according to claim 1, characterized in that the displaceable folding blade cylinder (19) is mechanically decoupled from other rotating cylinders (04; 07; 09) of the folding apparatus by an assigned electric motor (76).

4. Folding apparatus according to claim 3, characterized in that the folding jaw cylinder (09) has folding jaws (11; 23) with an adjustable gap width, and that the rotation of the electric motor (76) of the folding knife cylinder (19) to the width of the gap of the folding jaws (23 ) is coupled in such a way that a folding knife (22) of the folding knife cylinder (19) engages centrally in the gap at any width.

5. Folding apparatus according to one of the preceding claims, characterized in that the displaceable folding knife cylinder (19) does not follow a rotation of other rotating cylinders (04; 07; 09) of the folding apparatus in the rest position.

6. Folding apparatus according to one of the preceding claims, characterized in that the folding apparatus has a second, stationary-mounted folding knife cylinder (07).

7. Folding apparatus according to claims 1 and 6, characterized in that the jaw cylinder (09) has pairs of jaws (11; 23), the two jaws (11; 23) of a pair each having a different jaw cylinder (07; 19) interact.

8. Folding apparatus according to claim 7, characterized in that the two folding flaps (11; 23) of a pair are mutually adjustable in the circumferential direction.

9. Folding apparatus according to one of the preceding claims, characterized in that the displaceable folding knife cylinder (19) has a folding knife (22) and a gripper (21) which are mutually adjustable in the circumferential direction.

10. Folding apparatus according to one of the preceding claims, characterized in that the folding knife cylinder (19) can be displaced from the working position by tampers in the gap between it and the folding jaw cylinder (09).

11. Folding apparatus according to one of the preceding claims, characterized in that a tape guide system (91) for accepting signatures (16) from the folder cylinder (09) into an intermediate space (95) between the folder cylinder (09) and the displaceable folder cylinder (19) is insertable in its rest position.

12. Folding apparatus according to one of the preceding claims, characterized in that the cylinder (19) is moved mechanically out of the working position in the event of a voltage drop.

13. Folding apparatus according to one of the preceding claims, characterized in that the motors present in the unit are used as a generator in the event of a voltage drop and the cylinder (19) is driven synchronously with the folding jaw cylinder (09).

14. Folding apparatus with at least one folding jaw cylinder (09) and a first folding blade cylinder (07) and a second folding blade cylinder (19), characterized in that the first folding blade cylinder (07) and folding jaw cylinder (09) are coupled together in a form-fitting manner by a first electric motor (73) are driven and the second folding knife cylinder (07) is driven independently of the second electric motor (76).