EP0570334A1 - Folding jaw cylinder - Google Patents

Abstract

A folding jaw cylinder for a printing machine has a folding jaw arranged rotatably on the cylinder, a stop for the folding jaw, a rotary body which can be connected fixedly in terms of rotation to the cylinder and whose angular position is adjustable relative to the cylinder, and a gear mechanism for adjusting an operating distance between the folding jaw and the stop by adjusting the angular position between the cylinder and the rotary body. In this case, the stop is arranged movably on the cylinder and, during the adjustment of the angular position between the cylinder and the rotary body, is adjusted relative to the cylinder by an adjusting means which is linked to the rotary body and attached to the stop. <IMAGE>

Description

The present invention relates to a folding jaw cylinder for a printing press according to the preamble of claim 1.

For folding newspapers, magazines, brochures and the like, the sheets to be folded or the layers of sheets lying on top of one another are passed in a folder between a pair of cylinders consisting of a folding knife and a folding jaw cylinder. Such a folding jaw cylinder has one or more folding jaws which extend in the longitudinal direction of the cylinder, each of which, with a stop running parallel thereto, forms a jaw gap into which a folding knife arranged on the folding knife cylinder pushes. The printed product layers, usually paper layers, located at this point in the cylinder pair are pressed into the gap on the jaw cylinder. The folding knife is then withdrawn and the jaw gap is closed to such an extent that the printed product layers that have now been folded are held in place and are transported as the jaw cylinder rotates. About one mostly from one Cam and an existing cam roller adjustment mechanism, the gap width between the jaw and the stop is controlled so that the printed product layers of the folding knife pressed into the gap and can be clamped between the jaw and the stop after pulling out the folder. In addition to this rhythmic adjustment of the gap width, a so-called working distance between the folding jaws and the respectively assigned stops can be adjusted in adaptation to printed product layers of different numbers or thicknesses.

DE 38 38 314 A1 discloses a device for adjusting this working distance while the machine is running. The folding jaw cylinder has two hollow cylinders which are rotatably mounted about a common axis. On the circumference of the one hollow cylinder there is a folding flap which extends in the axial direction and, facing this folding flap, a counter flap serving as a stop is arranged on the other hollow cylinder. The folding flap is rotatably mounted for rhythmic adjustment of the gap width and thus for gripping the paper, while the counter flap is rigidly attached. To adjust the working distance between the folding flap and the counter flap, the two hollow cylinders can be pivoted against one another on a common cylinder shaft. For this purpose, the two hollow cylinders are rotated symmetrically with respect to one another via a gear, so that the respective folding and counter flaps move towards or away from one another in the manner of pliers. The simultaneous and symmetrical adjustment of both hollow cylinders is intended to ensure that the folding jaws and their respective counter-flaps are arranged symmetrically to the protruding folding blades. The gear unit for adjusting the two hollow cylinders has an actuating shaft guided through the hollow cylindrical shaft, the rotational movement of which is deflected by 90 ° each via two bevel gear sets and transmitted to an actuating spindle which has a left-hand portion at one end region and another at the other End area has a right-hand thread. Each threaded area is connected to one of the two hollow cylinders, so that the two hollow cylinders can be pivoted symmetrically relative to one another by rotating the adjusting spindle and the distance between the folding and counter flaps can thereby be adjusted. In this known device, the working distance is set as a function of a constant current thickness measurement of the printed product to be folded. Such a thickness measuring device and the associated control devices are complex and expensive. Furthermore, a continuous adjustment of the working distance in this way includes constant control even in the case of thickness deviations within the permissible tolerance range. However, the constant readjustments lead to a constantly changing contact pressure in the area of the effective surface pressure between the folding jaw and the stop, with the result that loss of printed copies or damage to printed copies can occur.

Another device for adjusting the working distance between the folding and counter flaps of a folding jaw cylinder is known from DE 40 37 130 A1. For this purpose, the folding jaw cylinder is also made up of two hollow cylinders, on which the folding or counter flaps are arranged in the known manner. In this case, the symmetrical, pincer-like twisting movement of the two hollow cylinders takes place via complex gearwheels.

A folding jaw cylinder with two hollow cylinders which can also be rotated symmetrically and in the manner of pliers, on each of which the folding jaws can be rotated and the counter flaps are arranged rigidly, is evident from DE 40 35 617 A1. The device used in this known folding jaw cylinder for adjusting the working distance between the folding and the respective counter flaps contains a sliding piece which can be displaced radially to the cylinder axis, in its two V-shaped grooves, a pin rigidly attached to a respective hollow cylinder is guided. By moving the slider in the radial direction towards or away from the cylinder axis, the two hollow cylinders are rotated symmetrically with respect to one another and the working distance between the folding and counter flaps is thereby changed.

A disadvantage of these known folding jaw cylinders is the complicated structure with two hollow cylinders, which have to be manufactured separately and then assembled together. The mechanism known from DE 38 38 314 A1 for mutually adjusting the two hollow cylinders with adjusting shafts running through the hollow cylinders, bevel gear sets for deflecting the rotary movements and the adjusting spindle is complex, expensive and prone to failure. Safe self-locking of the adjusting spindle cannot be guaranteed. The gear mechanism of DE 32 20 414 A1 arranged within the hollow cylinder is also complex and expensive because of the various gear deflections. In the solution according to DE 40 35 617, problems arise because of the surface pressure acting on the slide in the grooves. Such an adjustment is afflicted with play after a relatively short time, so that an exact adjustment of the working distance between the folding and counter flaps is no longer guaranteed. The cleaning of such adjusting mechanisms arranged in the hollow cylinder also requires a complete disassembly of the cylinder in the event of contamination due to the massive oil and paper dust occurring in the folder. Contamination is a particular problem due to the danger of inhibitions, which can easily occur with these adjustment mechanisms due to the complex structure with long chains of action, ie with multiple deflections, translations, sliders, etc.

A one-piece jaw cylinder is disclosed by DE 32 20 414 A1. The folding flap and the movable counter flap can be adjusted to the paper thickness to be processed. The counter flap can be displaced approximately in the circumferential direction of the folding jaw cylinder by means of two eccentric bolts and can thus be set to a certain dimension in relation to the folding knife. The folding jaw controlled by a cam roller is screwed onto a spindle, which is mounted on both sides in the cylinder body of the folding jaw cylinder. In order to adjust the working distance between the folding flap and the counter flap, not only is the counter flap moved, but the folding flap is also rotated relative to the cylinder. For this purpose, the connection between the folding jaw and the cam roller must be interrupted and the part of the connection carrying the jaw flap must be designed such that it can be rotated and locked relative to the part carrying the cam roller via a further system of eccentric bolts. The working distance can only be adjusted when the machine is at a standstill and requires the eccentric bolts of the rebate and counter flaps to be adjusted individually. An adjustment mechanism for coordinating the adjustment movements of the counter flap and the folding flap is not provided.

The invention has set itself the task of avoiding the disadvantages that occur in connection with the adjustment of the working distance between a folding flap and a counter flap serving as a stop in the folding jaw cylinders known from the prior art. In particular, the setting of the working distance should take place in a coordinated manner via an adjustment mechanism. The adjustment mechanism and the jaw cylinder should have a simple structure. The adjustment mechanism should be insensitive to dirt and ensure safe self-locking during operation of the jaw cylinder.

This object is solved by the subject matter of claim 1.

Advantageous, not smoothly self-evident embodiments of the invention are disclosed by the subclaims.

According to the invention, a folding jaw cylinder has a cylinder on which both a folding jaw and a stop, preferably in the form of a stop lamella, are arranged. A rotating body rotating about the same axis can be connected in a rotationally fixed manner to the cylinder, so that the cylinder and rotating body can be rotated relative to one another in their angular position and can then be connected to one another in a rotationally fixed manner or are constantly connected to one another by a corresponding coupling mechanism during this relative angular position adjustment. According to the invention, the movement of the stop arranged on the cylinder is coupled to the angular position adjustment between the cylinder and the rotating body, namely by means of an actuating means which is articulated on the rotating body and fastened to the stop, the fastening on the stop basically being rigid; it is preferably articulated. If the cylinder has several pairs of jaws and stops, an adjusting means is assigned to each stop. The folding jaw cylinder itself can thus be made in one piece, which offers the advantage of a simpler and cheaper manufacture and assembly compared to a multi-part cylinder with nested hollow cylinders. By means of the actuating means, each angular position adjustment between the cylinder and the rotating body is coupled with an adjustment of the stop (s) with respect to the cylinder and thus with respect to the one or more folding jaws, so that a twisting of the folding jaw cylinder relative to a corresponding folding knife cylinder occurs the forced counter movement of the stop (s) can be compensated. The advantage of the present invention is based on the fact that the jaw cylinder is made in one piece and the working distance between the jaw and the stop is still adjustable solely by adjusting the angular position of the cylinder relative to a rotating body.

Since the entire mechanism required for the coordinated adjustment of the working distance is advantageously arranged outside the jaw cylinder, the assembly and, in particular, any repairs or maintenance work that may be necessary subsequently are made considerably easier because of the inherently good accessibility.

Such a stop can be slidably attached to the jaw cylinder; However, it is advantageously rotatable about an axis arranged parallel and eccentrically to the axis of rotation of the cylinder. The assigned folding flap is particularly preferably rotatably mounted on the cylinder about the same axis.

So that when the folding jaw cylinder is rotated relative to the folding knife cylinder, a folding knife always lies in the middle between a folding jaw / stopper pair, the counter-movement of the stopper required to compensate for the cylinder rotation can be done via a spur gear, consisting of a central spur gear forming the rotating body and an outer wheel arranged in a planet-like manner to this spur gear and engaged therewith. In this embodiment of the invention, the outer wheel is connected in a rotationally fixed manner to the rotatably mounted stop, for example by being plugged onto the axis of rotation of the stop. Each stop is connected to such an outer wheel in this way.

In a preferred embodiment of the invention, the adjusting means is formed by a lever which is articulated on the rotating body by means of a rotary bearing. In the case of a rotatably mounted stop, such a lever is preferably likewise articulated to the stop by means of a pivot bearing, while in the case of a displaceably arranged stop it is preferably rigidly attached to the stop. For the central immersion of the folding blade in the gap formed between the pair of folding jaws, the rotation of the folding jaw cylinder relative to the folding blade cylinder in the first embodiment is compensated for by a corresponding counter-rotation of the stop about its own axis of rotation.

Such a lever is particularly preferably designed as a rigid connection between its articulation on the rotating body and that on the stop. The lever can be bent or bent in a suitable manner or can be designed as a simple, straight rod.

The rotating body preferably has the shape of a disk or a star with a number of arms corresponding to the number of pairs of folding jaws and stops. Such a lever system comprising the rotating body and one or more levers shows almost no signs of wear even after a long period of operation, which could lead to a playful adjustment of the working distance between the individual pairs of jaws and stops. Pollution problems can hardly occur anymore. The inventive design of the actuating means as a lever thus represents a particularly robust, simple and therefore inexpensive solution for the coordinated adjustment of the working distance.

The angular position adjustment of the folding jaw cylinder can be done manually or automatically and preferably both manually and automatically via a corresponding actuator.

According to a simple embodiment of the invention, the manual adjustment takes place via a spindle drive with a spindle which runs in a spindle nut rotatably mounted on the rotating body and a spindle holder rigidly connected to the cylinder. The spindle nut is rotatable about an axis parallel to the cylinder axis. The spindle has two thread areas of different pitch, of which the thread area with the smaller pitch rotates in the spindle holder on the cylinder. Free rotation of the spindle can be prevented by a compression spring arranged between the holder and the spindle nut concentrically to the spindle or other suitable play-inhibiting elements. The spindle is preferably adjusted by hand using a vernier when the jaw cylinder is stationary, but could in principle also be done by means of a servomotor rotating the spindle.

In a further preferred embodiment of the invention, the working distance can also be adjusted when the folding jaw cylinder is rotating. The angular position adjustment takes place via an adjustment gear with two gear wheels arranged one behind the other, preferably displaceable relative to one another along their common axis of rotation and connected to one another in a rotationally fixed manner. One of these two gears meshes with a counter gear attached to the jaw cylinder and the other with a counter gear attached to the rotating body. In this case, the gearwheel of the adjusting gear coupled to the rotating body is preferably driven. The one with the jaw cylinder Coupled gear of the adjustment gear is helically toothed in this case, so that an axial displacement of this gear causes a rotation of the counter gear, which is then also helical, and thus a rotation of the jaw cylinder. The shifting of the gear wheel of the adjustment gear, which is coupled to the jaw cylinder, takes place via a spindle drive, which is actuated automatically either manually or particularly advantageously via a servomotor. Both options can also exist side by side.

According to a particularly preferred embodiment of the invention, the working distance is set via an actuator control as a function of adjustable control variables, in particular the number of pages of the printed product and, if appropriate, the area-specific weight of the paper, by means of which the working distance to be set is determined.

Starting from the print product to be finished, it is possible to store the necessary production factors in a memory of a computer-controlled printing press. In this way, standards of various print products, in particular newspapers, such as newspaper format, paper quality, type of production, etc., possibly supplemented by current data, can be recorded once and reused for fully automatic production control.

In addition, tables of text volumes are recorded that define the page size of individual newspaper editions. The number of pages and the number of pages together with the known paper thickness determine the thickness of the printed product to be folded in accordance with the volume of text. The limited number The values in question for the number of pages and the values for the area-specific weight of the paper divided into paper weight groups are advantageously each discretely stored in the form of a list or a common table. At an input, for example a machine control center, the values for a specific print product can be selected from the saved lists and preset. Since it is known from newsprint production, for example, that the specific volume as a ratio of paper thickness to paper basis weight should be 1.45 cm 3 / g, there is always a clear assignment of the paper basis weight and the corresponding paper thickness. The target value for the working distance can thus be determined for a single or double production as the sum of a correction factor for the paper roughness and the product of the calculated paper thickness and the number of pages of the printed product.

The paper roughness, by which the folding process is also influenced, can also be stored in the form of a table of values in the memory of such a machine control and can be used in the calculation of the setpoint for the working distance. In this way, the working distance can be preset fully automatically, without requiring constant measurement of the thickness of the printed product to be folded, with the result of constant readjustment.

Such an automated adjustment is particularly favored by the adjustment of the working distance according to the invention, which takes place solely with the angular position adjustment. In the case of a folding jaw cylinder according to the invention, the setting of the working distance can therefore be fundamentally fully automatic from an input or also manually at a standstill and with the machine running.

Fig. 1

die wesentlichen Komponenten eines Falzapparates in schematischer Darstellung;

Fig. 2

einen Falzvorgang;

Fig. 3a

eine Schnittdarstellung eines Falzklappen-Zylinders, der über ein Hebelsystem mit einem Drehkörper gekoppelt ist;

Fig. 3b

einen Falzklappen-Zylinder mit einem Verstellgetriebe für die gegenseitige Verdrehung des Drehkörpers und des Falzklappen-Zylinders in Schnittdarstellung.

Fig. 4

ein um eine gemeinsame Achse drehbares Falzklappen/Anschlag-Paar im Querschnitt A-A gemäß den Fig. 3a und 3b;

Fig. 5

den Falzklappen-Zylinder gemäß Fig. 3a mit einer Verstellspindel zur Verstellung der Winkellage des Falzklappen-Zylinders gegenüber dem Drehkörper;

Fig. 6

den Falzklappen-Zylinder gemäß den Fig. 3a und 3b mit an den Drehkörper und an die Anschläge des Falzklappen-Zylinders angelenkten Hebeln; und

Preferred embodiments of the invention are described with reference to the figures below. The figures disclose further advantageous features of the invention. Show it:

Fig. 1

the essential components of a folder in a schematic representation;

Fig. 2

a folding process;

Fig. 3a

a sectional view of a jaw cylinder, which is coupled to a rotating body via a lever system;

Fig. 3b

a jaw cylinder with an adjustment gear for the mutual rotation of the rotating body and the jaw cylinder in a sectional view.

Fig. 4

a pair of jaws / stopper rotatable about a common axis in cross section AA according to FIGS. 3a and 3b;

Fig. 5

the folding jaw cylinder according to FIG. 3a with an adjusting spindle for adjusting the angular position of the folding jaw cylinder relative to the rotating body;

Fig. 6

the folding jaw cylinder according to FIGS. 3a and 3b with levers articulated on the rotating body and on the stops of the folding jaw cylinder; and

In Fig. 1, the essential parts of a folder are shown. A printing web 2 is passed between a cutting knife cylinder 3 and a folding knife cylinder 5 and cut to the desired length by means of a cutting knife 4. The possibly multilayered, cut printed product 2 then runs, carried by the folding knife cylinder 5, through the gap between the Folding knife cylinder 5 and a folding jaw cylinder 7 are folded through and transported away via a paddle wheel delivery 10 as a finished printed product 2.

In the folding process shown in FIG. 2, a multilayer printed product 2 is pressed by means of a folding knife 6 into a gap formed between a folding flap 8 and a stop 9. After the folding knife 6 has been pulled back, the folding flap 8 is rotated about its axis of rotation 23 against the stop 9. This rotation of the jaw 8 can be controlled in a known manner via a cam.

FIG. 3a shows a folding jaw cylinder 7 with an adjusting spindle 50 arranged on its end face and a rotating body 40 arranged on its other end face. The jaw cylinder 7 is rotatably mounted on a driven shaft 12, to which the rotating body 40 and a cross-shaped support 60 are each rigidly connected. The rotational movement of the shaft 12 is in turn firmly coupled to the rotational movement of the jaw cylinder 7 via the non-positive connection with the cross-shaped carrier 60. In the exemplary embodiment, four jaw jaws 18 are evenly distributed on the circumference of the jaw cylinder 7.

Fig. 4 shows such a jaw flap 18 in cross section A-A. The jaw spindle 18 and a support tube 19 are received in a recess 30 of the jaw cylinder 7. The folding jaw spindle 18 with a folding jaw 8 and the support tube 19 with a stop 9 designed as a stop lamella can be rotated about the common axis 23.

The working distance is set by rotating the jaw cylinder 7 relative to the knife cylinder 5 (for comparison see also Fig. 1), the corresponding counter-movement of the stop plate 9 is superimposed so that the advancing folding knife 6 to the free end of the jaw 8 and the free end of the stop plate 9 has the same distance. The superimposition or coupling of these two opposing rotary movements takes place, as shown in FIG. 3a, via levers 16, which are each articulated on the rotating body 40 and on the support tube 19. In the exemplary embodiment, the linkage 22 to the support tube 19 and the linkage 42 to the rotary body 40 are designed as rotary bearings.

In the exemplary embodiment according to FIG. 3a, an adjusting spindle 50 is used to adjust the angular position of the jaw cylinder 7 relative to the rotating body 40. The functioning of the adjusting spindle 50 can be seen from FIG. 5. A spindle 51 has two threaded areas with different pitch, of which the threaded area with the larger pitch runs in a spindle nut 52 which is rotatably mounted on a cruciform support 60 connected to the shaft 12 in a torsionally rigid manner about an axis 53 running parallel to the shaft 12. The outer, second thread area with the smaller thread pitch runs in a spindle holder 54 rigidly attached to the jaw cylinder 7. The spindle 51 is adjusted manually by means of a vernier 59 or via a adjusting motor, for example battery-operated, arranged on the end of the adjusting spindle. Instead or in addition to this, the adjusting spindle 50 could also be actuated by means of a servomotor which can be controlled manually from the control center or by a machine computer-controlled servomotor. A compression spring 56 clamped between the spindle nut 52 and the spindle holder 54 prevents play of the adjusting spindle 50. A bellows 58 ensures that the threads of the spindle 51 do not become dirty can.

6 shows the levers 16 articulated in a fixed manner on the rotating body 40 via their respective rotary bearings 42. This is a folding jaw cylinder 7 with, for example, four pairs of folding jaws 8 and stop lamellae 9 according to FIG. 4, each offset by 90 °. On each support tube 19 there is a lever 16 designed as a rigid, straight rod at a distance from the axis of rotation 23 of the support tube 19 articulated by means of the pivot bearing 22. With its other end, each lever 16 is articulated in a rotary bearing 42 to the rotary body 40, the rotary bearings 42 being arranged distributed uniformly on a circle on the rotary body 40. With the rotation of the jaw cylinder 7 with respect to the rotating body 40, a counter-rotating rotation of the stop plates 9 attached to the support tubes 19 is brought about by the levers 16. The dimensioning of the lever length and the positioning of the articulations 22 on the support tubes 19 and the articulations 42 on the rotating body 40 is carried out in such a way that the free ends of the stop blades 9 are moved back by a distance counter to the direction of rotation of the jaw cylinder 7, which is twice as much is as large as the distance traveled by the free ends of the jaws 8 during the angular position adjustment of the jaw cylinder 8. This ensures that the folding knives 6 after each relative angular position adjustment of the jaw cylinder 7 exactly to the axis of rotation 12 in the middle of the jaw gap between the tips Immerse the jaws 8 and the stop slats 9 through.

During the adjustment of the working distance between the folding jaws 8 and the corresponding stop lamellae 9 in the exemplary embodiment according to FIG. 3a, only when it is stationary Machine is done, the setting in the jaw cylinder 7 shown in Fig. 3b is also possible during rotation. Here, the jaw cylinder 7 is firmly connected to the shaft 12, while the rotating body 40 is seated on a cylinder bush 41 rotatably mounted on the shaft 12. The cylinder liner 41 is rotatably supported in the fixed frame II. The system of the levers 16 can correspond to that of the previous exemplary embodiment. On the shaft 12 and on the cylinder liner 41 there are in each case torsionally rigid gears 17 and 44. The helical gear 17 on the shaft 12 meshes with a corresponding helical gear 77 of an adjustment gear 70 and the gear 44 on the cylinder liner 41 with one Another gear 74 of the same adjustment gear 70. The latter gear 74 of the adjustment gear 70 is driven via a gear 84 of the cylinder drive and in turn serves as an output gear 74 to the jaw cylinder 7. The helical gear 77 of the adjustment gear 70 is non-rotatably connected to its output gear 74, the two Gears 74 and 77 can, however, be moved parallel to one another relative to the common axis of rotation 79. For this purpose, in the exemplary embodiment, the helical gear 77 is connected to a central first actuating rod part 75, which is displaceable along the common axis of rotation 79 of the two gears 74 and 77. The parallel displacement of the first actuating rod part 75 and thus of the gear 77 takes place by turning a handwheel 72 via a second actuating rod part 71 which is separated from the first actuating rod part 75 at a transition point 73 and which can be locked by means of a clamping lever 78. The rotational movement of the handwheel 72 is converted into a longitudinal movement of the first actuating rod part 75 and thus of the gear 77 via a sliding movement of the second actuating rod part 71 at the transition point 73. Since the two meshing gears 17 and 77 of the jaw cylinder 7 and Adjusting gear 70 are helically toothed, with this displacement of the gear 77 the jaw cylinder 7 is adjusted in its angular position with respect to the cylinder sleeve 41 and thus with respect to the rotating body 40. The superimposed, opposing adjustment of the stop slats 9 takes place via the described levers 16. The handwheel 72 can be supplemented or replaced by a servomotor controlled by a machine computer in order to enable the working distance between the folding jaws 8 and the stop slats 9 to be set automatically.

REFERENCES

Printing web

2nd

Cutting knife cylinder

3rd

Cutting knife

4th

Folding knife cylinder

5

Folding knife

6

Jaw cylinder

7

Jaw

8th

Stop slat

9

Paddlewheel delivery

10th

wave

12

lever

16

gear

17th

Jaw spindle

18th

Support tube

19th

Pivot bearing

22

Axis of rotation

23

Torsion bar

24th

Recess

30th

Rotating body

40

Cylinder liner

41

Pivot bearing

42

gear

44

Adjusting spindle

50

spindle

51

Spindle nut

52

Axis of rotation

53

Spindle holder

54

Compression spring

56

Bellows

58

Vernier

59

Cross-shaped carrier

60

Variable speed gear

70

first actuator part

77

Handwheel

72

Transition point

73

Output gear

74

second actuator part

71

gear

77

Clamping lever

78

Axis of rotation

79

Drive motor

80

drive wheel

84

frame

II

Claims (21)

Jaw cylinder for a printing press a) with a folding flap (8) rotatably arranged on the cylinder (7), b) with a stop (9) for the folding flap (8), c) with a rotationally fixed to the cylinder (7) connectable rotating body (40), the angular position of which is adjustable to the cylinder (7), and d) with a gear (50; 70) for setting a working distance between the jaw (7) and the stop (9) by adjusting the angular position between the cylinder (7) and the rotating body (40), characterized in that e) the stop (9) is movably arranged on the cylinder (7); and f) that the stop (9) during the angular position adjustment between the cylinder (7) and the rotating body (40) by means of an adjusting means (16) articulated on the rotating body (40) and fastened to the stop (9) relative to the cylinder (7) is adjusted. Folding jaw cylinder according to claim 1, characterized in that the stop (9) is rotatable about an axis (23) arranged parallel and eccentrically to the axis of rotation of the cylinder (7). Folding jaw cylinder according to claim 1 or 2, characterized in that the stop (9) and the folding jaw (8) can be rotated about the same axis (23). Folding jaw cylinder according to one of claims 1 to 3, characterized in that the cylinder (7) and the rotating body (40) are coupled to one another in a rotationally fixed manner during the angular position adjustment. Folding jaw cylinder according to one of claims 1 to 4, characterized in that the fastening (22) of the adjusting means (16) to the stop (9) and the articulation (42) to the rotating body (40) are designed as rotary bearings. Folding jaw cylinder according to one of claims 1 to 5, characterized in that the adjusting means (16) is designed as a rigid connection between the fastening (22) to the stop (9) and the articulation (42) to the rotating body (40). Folding jaw cylinder according to claim 6, characterized in that the adjusting means (16) is designed as a rod-shaped lever. Folding jaw cylinder according to one of claims 1 to 4, characterized in that the rotating body (40) is formed by a gearwheel with which another gearwheel rigidly connected to the stop (9) meshes to rotate the stop (9). Folding jaw cylinder according to one of claims 1 to 8, characterized in that the rotating body (40) is arranged facing an outer end face of the folding jaw cylinder (7). Folding jaw cylinder according to one of claims 1 to 9, characterized in that the cylinder (7) has a plurality of pairs of folding jaws (8) and stops (9), each with one attached to the stop (9) and articulated to the rotating body (40) Has adjusting means (16). Folding jaw cylinder according to one of claims 1 to 10, characterized in that the cylinder (7) is adjustable relative to the rotating body (40) via a spindle (51) which is arranged in a stationary manner about a parallel to the axis of rotation of the cylinder (7) Axis (53) pivotally connected to the shaft (12) spindle nut (52) and a spindle holder (54) rigidly attached to the cylinder (7). Folding jaw cylinder according to claim 11, characterized in that the spindle (51) has a first thread region running in the spindle nut (52) and a second thread region running in the spindle holder (54), which has a smaller pitch than the first thread region, owns. Folding jaw cylinder according to claim 11 or 12, characterized in that the spindle (51) is adjustable manually or driven by means of a servomotor. Folding jaw cylinder according to one of claims 1 to 10, characterized in that for adjusting the angular position of the cylinder (7) with respect to the rotating body (40) an adjustment gear (70) is provided with a helical toothed gear (77) which is connected to the cylinder (7) combs firmly connected counter wheel (17) and is displaceable relative to this counter wheel (17). Folding jaw cylinder according to claim 14, characterized in that the adjustment gear (70) has a further gear wheel (74) for the output to a counter wheel (44) connected to the rotating body (40) in a manner fixed against relative rotation. Folding jaw cylinder according to claim 15, characterized in that the helical toothed gear (77) and the driven gear (74) of the adjustment gear (70) are connected to one another in a rotationally fixed manner. Folding jaw cylinder according to claim 15 or 16, characterized in that the helical toothed gear (77) of the adjusting gear (70) is displaceable relative to the driven gear (74). Folding jaw cylinder according to claim 17, characterized in that the displacement of the helical toothed gear (77) with respect to the driven gear (74) of the adjusting gear (70) takes place via a spindle drive (71, 73, 75) which is manual and / or via a servomotor (84) can be actuated. Folding jaw cylinder according to one of claims 1 to 18, characterized in that a control in the form of a fixed circuit or a programmable computer which has an electronic memory is provided for adjusting the working distance between the folding jaw (8) and the stop (9) , in which the possible values for the number of printed product layers to be folded or the printed product pages are stored and from this list of discrete values the value for production can be selected on one input. Folding flap cylinder according to claim 19, characterized in that the possible values for the area-specific weight of the printed product material are stored in the same or in a further memory of the control system, are selectable and can be linked to the values for the number of printed product layers or pages. Folding flap cylinder according to claim 18 or 19, characterized in that the possible values for the surface roughness of the printed product material are stored in the same or a further memory of the controller, can be selected and with the values for the number of printed product layers or pages and / or the Values for the area-specific weight can be linked.

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