EP1849730B1 - Folding apparatus - Google Patents

Abstract

The holder has a folding blade cylinder (08) which carriers number of folding blades and tool holders distributed about its circumference. A control unit is coupled to activate a driving motion. The angular separation between tool holder and folding blade cooperates with one of the tool holder holding a product, which is adjustable between pi /n and pi m/n (m+1).

Description

The invention relates to a folding apparatus according to the preamble of claim 1.

Such a folding apparatus generally comprises a folding blade cylinder, each carrying a number n of folding blades and holding tools distributed uniformly around its circumference. The holding tools are used to hold the folding blade cylinder supplied product on the surface of the folding blade as long as fixed and to transport with its rotation until it is released at a transfer point again, the transfer to a following on the folding blade transport unit by extending a folding blade along a center line of the product and passing the product with the folded center line forward to this subsequent unit.

The working movements of the folding blades and holding tools are controlled by scanned by control devices of the folding blade or holding tools cams, which are arranged coaxially to the folding blade but not together with this rotatable. Thus, with each revolution of the folding blade cylinder, the control device of each folding blade or holding tool passes once a circumferential section of the cam plate which controls a given working movement.

In order to temporarily suppress certain working movements, it is known to associate with each camming disk a cover disk which is rotatable coupled to the folding blade cylinder but at a different speed therefrom and has sectors with different radii, a first of these radii being chosen such that the control device simultaneously with a sector of the cover plate with this first radius of the working movement controlling portion of the cam happens, the working movement is not hindered, while a cover disc sector with the second radius prevents an adjoining control device from carrying out their working movement.

Out WO 2005/102890 A2 a folding apparatus of this type is known, in which a cover disc has a plurality of sector groups of sectors, where sectors are calculated to a same sector group, which are successively passed in successive revolutions of the cylinder in each case together with the working movement controlling portion of the cam of the control device , and wherein the groups differ from each other in the frequency of the sectors having the first radius and the sectors having the second radius, respectively. More specifically, in this known folder, there are four groups of sectors, the first group comprising only sectors of the first radius, the second group of each sector of the first radius comprising one sector with the second, the third of each sector having the second first radius includes two sectors of the second radius, and the fourth group on each sector of the first radius comprises three sectors of the second radius. Depending on which of the four groups of sectors is scanned in operation, this folder allows for non-collection, single, dual or triple collection operation.

Collecting a large number of products on the folding blade cylinder only makes sense if the plate cylinders of a printing machine upstream of the folding machine have a correspondingly large number of fields on their circumference. In a two-color press, two- or three-pack operation would result in products being collected with the same printed images, which is generally undesirable.

From the JP 57 033161 A and the DE 29 36 768 A1 It is known, the angular distance between holding tools and folding blades to adapt to different To adjust sheet formats.

The invention has for its object to provide a folder.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular in that the folder allows a collection operation with a large number of different collected products despite limited number of fields of the plate cylinder an upstream printing press. If the angular distance between the holding tool and the associated folding blade is π / n, then products can be cut from a material web printed in the printing machine whose length corresponds to the length of the fields, and these products can be picked up by the folding cylinder and centered. At an angular distance between holding tool and folding blade of nm / n (m + 1), a central folding of products is possible, of which m + 1 pieces are cut per revolution of the plate cylinder, i. H. whose length is the m / (m + 1) times a field of the plate cylinder.

Of the multiple sector groups, one may include only sectors of the first radius. Such a group is needed for non-batch operation.

Conversely, in the case of the cover disk scanned by the control device of the folding blades, one of the groups may comprise only sectors with the second radius. As a result, an extension movement of the folding blade is prevented, so that the products can pass through the folder without being rolled.

The same result can be achieved if the control means of the folding blades are fixable in a position in which they contact at least each the first radius sector are prevented. This alternative has the advantage that it does not require a separate group of sectors for non-folding operation, so that more space is available for the other groups at the periphery of the corresponding cover disk.

In order to allow Nichtfalzbetrieb, is conveniently scanned by the control means of the holding tools cover plate between a Falzbetriebsstellung in which it allows the working movement for releasing a held product on passage of the product to be folded by a transfer point, and a Nichtfalzbetriebsstellung phase-adjustable, in the it allows the movement to release a held product as it passes from its leading end through the transfer point.

The control cam controls, the cover plate allows or prevents the contact of the control devices to the control curve.

The scanned by the holding tools cover plate can be coupled via a differential gear to the rotation of the cylinder body. The ratio of the differential gear is suitably chosen so that when the control shaft of the differential gear the cover disc retains the set Falzbetriebsstellung or Nichtfalzbetriebsstellung during rotation of the folding blade, while switching the folding shaft between Falzbetriebsstellung and Nichtfalzbetriebsstellung or between different product lengths corresponding Falzbetriebsstellungen by turning the control shaft.

The scanned by the control means of the holding tools control cam generally controls as a further working movement a gripping movement by which a supplied product is set on the folding blade. When to switch between folding mode and non-folding mode or length change of the folding Arch the cam is rotated, so this also leads to a shift of the location of the gripping movement along the circumference of the folding blade. To ensure that a folding blade cylinder supplied product can be safely determined by the holding tool in both folding and non-folding operation, a tape guide device is preferably provided, which wraps the folding blade from a point of impact of the products at an angle which corresponds at least Verstellbewegungsfreiheit the control curve ,

Also, the scanned by the folding blades cover plate is preferably coupled via a differential gear to the position of the cylinder body, and by turning a control shaft of the differential gear, the cover plate between a position in which the folding blades their working movement controlling portion of the cam respectively together with sectors of a first of the groups pass, and a position adjustable in which they pass the work movement controlling section together with sectors of any other of the groups. Thus, the control shaft is used to switch between collection and non-collection mode or between different collection modes.

Preferably, each group comprises six sectors. This is the smallest number of sectors required to realize non-collection, single and dual collection.

One of the groups of sectors, referred to as a single collection group, has equal numbers of sectors of the first and second radius that are alternately sampled by the controllers. For another group, referred to as dual hunt groups, there is a sector of the first radius for every two sectors of the second radius.

In order to keep the positioning movement between the modes small, the sectors of the Single collection group and the dual collection group preferably arranged in pairs adjacent to each other. This arrangement also limits the number of steps on the circumference of the cover plates, which can wear them heavily in contact with the control devices or are themselves prone to wear.

Since the number of products that the jaw cylinder can process per revolution is constant, it must be operated at different rotational speeds, depending on how large the number of products cut from a given length of the substrate web and fed to the jaw cylinder.

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

Fig. 1

eine schematische Seitenansicht eines Falzapparats;

Fig. 2

einen partiellen axialen Schnitt durch den Falzmesserzylinder und dessen Lagerung mit Steuerkurven und Deckscheiben mit ihren Antrieben;

Fig. 3 bis 8

schematische Seitenansichten des Falzmesserzylinders sowie der die Haltewerkzeuge steuernden Kurvenscheibe und Deckscheibe in verschiedenen Betriebszuständen des Falzapparats;

Fig. 9 und 10

schematische Seitenansichten des Falzmesserzylinders und der die Falzmesser steuernden Kurvenscheibe und Deckscheibe in verschiedenen Betriebszuständen.

Show it:

Fig. 1

a schematic side view of a folder;

Fig. 2

a partial axial section through the folding blade and its storage with cams and shrouds with their drives;

Fig. 3 to 8

schematic side views of the folding blade and the holding tools controlling cam and cover plate in different operating conditions of the folder;

FIGS. 9 and 10

schematic side views of the folding blade and the folding blade controlling cam and cover plate in different operating conditions.

The in Fig. 1 schematically illustrated folder receives a printed web 01, z. B. web 01 or from another substrate from a printing press, which, as is known per se, is not shown in the figures. The printing machine has z. Example, two-plate plate cylinder, ie there are m = 2 printing plates, which may have different printed images, mounted over the circumference of the plate cylinder away.

At the entrance of the folder, the paper web 01 passes through a first Querscheider 02, z. B. a pair of cutting rollers 02, which cross-cut the paper web 01 into individual products. The rotational speed of the cutting rollers 02 is adjustable independently of the running speed of the paper web 01 to allow the production of products of different lengths. In most cases, the rotational speed of the cutting rollers 02 is set so that products are obtained with a length corresponding to the circumferential length of the printing plates, each carrying the print image of each printing plate. But it is also adjustable by the factor (m + 1) / m = 1.5 higher rotational speed of the cutting rollers 02, whereby products are obtained whose length corresponds to two thirds of the circumferential length of the printing plates and of which the first product, the first two Third of the printed image of the first printing plate, the second product the last third of the printed image of the first printing plate and the first third of the printed image of the second and the third product carries the last two-thirds of the printed image of the second printing plate. By operation with a correspondingly increased rotational speed, it is also conceivable with the aid of the cutting rollers 02 to obtain four or more products from a piece of the paper web 01 which is two plates long.

An alternative way to obtain different numbers of products, is to equip the cutting rollers 02 with multiple sets of equally angularly spaced knives, z. Example, a set of two knives and one with three knives, of the two sets each time only one is extended to cut the web 01. In this case, the peripheral speed of the cutting rollers 02 can be fixed be coupled to the running speed of the web 01.

However, it must be ensured that each front cutting edge can be grasped by a holding system and can be folded with a folding blade system.

On the way of the products through the folder a strip conveyor 03 is arranged following the cutting rollers 02, the two guided over guide rollers 04 belts 06; 07 includes.

Opposite sections of bands 06; 07 form a channel through which the between the bands 06; 07 clamped products to a folding blade 08, in particular collecting cylinder 08, are performed. The band 07, which forms the side of the channel facing the folding blade cylinder 08, extends to the vicinity of a point of impact 10 of the products on the folding blade cylinder 08. The band 06 extends beyond the impact point 10 and wraps around the folding blade cylinder 08 in a large part its circumference until just before a transfer gap 09, where the folding blade cylinder 08 and a jaw cylinder 11 are opposite and the products are transferred to the jaw cylinder 11.

The folding blade cylinder 08 carries an odd number n of holding tools 12, z. As grippers 12 and folding blades 13, in the example considered here n = 5 each, the in Fig. 1 are not shown. The grippers 12 each perform on the looped by the band 06 portion of the folding blade 08 an opening and closing movement to clamp the folding blade cylinder 08 supplied products, and a further opening and closing movement after passing through the transfer gap 09 to the transfer of To allow products on the jaw cylinder 11. The folding blades 13 are each extended during the passage through the transfer gap 09 from the inside of the folding blade 08 to a product held thereon with a fold line first in a jaw, not shown of the jaw cylinder 11 introduce. In order to fold the products in the middle, the angular distance between a gripper 12 and a folding blade 13, which acts on the product held by this gripper 12 product, between one tenth (1 / 2n) of the circumference of the folding blade 08 when processing products with a full page length and one fifteenth (1 / 3n) of the circumference of the folding knife cylinder 08 when processing products with two thirds side length slidable.

The speed of the paper web 01 is determined by the printing unit speed, one manufactures a product in which the paper conveyed by a printing unit revolution is divided into two sections, the cutting mechanism (cross cutter 02) makes two revolutions and the folding blade cylinder 08 advances by two divisions ,
If the web section conveyed per printing-cylinder revolution is cut into three equal sections, the cutting mechanism makes three revolutions and the folding-blade cylinder 08 advances by three divisions.
The belts 06 and 07 run at the circumferential speed of the folding blade 08. By rotating the cutting rollers 02 ensures that the beginning of sheet meets a gripper 12 when the sheet rises on the folding blade 08. The adaptation of the folder to the printing units is done by an adjustment stage that is, in front of the cutting unit.

The jaw cylinder 11 is equipped in addition to the already mentioned jaws with grippers of the same type as the gripper 12 of the folding blade 08. By the gripper 12 of the folding blade 08 open each case when passing through the transfer gap 09 and at the same time close the gripper of the jaw cylinder 11, and an extension of the folding blade 13 is prevented, an operating state is feasible, in which products pass the folding blade 08 without being cross-folded , The details of this operating state are described below with reference to Fig. 2 ff. explained in more detail.

A second belt conveyor 14 is provided for removing products from the jaw cylinder 11 and for feeding products to a longitudinal folder, not shown. Alternatively, the products pass from the jaw cylinder 11 to a paddle wheel 16, from which they are scaled onto a conveyor belt 17.

Fig. 2 shows a section through an axial end portion of the folding blade 08 and a side frame plate 18 of the folding apparatus, in which the folding blade cylinder 08 is held. The folding blade cylinder 08 includes a shaft 19 which passes through an opening of the side frame plate 18 and in this by a bearing 21, for. B. Rolling 21 is rotatably supported. With the shaft 19 five arms 22 are rotatably connected, of which only one in the Fig. 2 shown in section. At the ends of the arms 22 each have a spindle 23 is pivotally supported, the gripper 12 carries. A fortified at the end of the spindle 23 control device 24, for. B. a pivot arm 24 carries at its free end two rollers 26 which scan a cam 27 and a cover plate 28 which are arranged coaxially to the shaft 19 and rotatable about this.

Five protruding from the shaft 19 arms 29, of which in turn only one in Fig. 2 is shown, each carrying at its ends a spindle 31 to which a folding blade 13 is mounted. The angular distance of the arms 29 from the arms 22 can be fixed differently to adjust the distance between grippers 12 and the folding blades 13 as already described above to the length of the products to be processed, which is not shown. Likewise, the angular position of the cam 27 must be changed for the holding elements. To adjust the gripper control cam is a servomotor 30 which engages via a belt drive and a shaft 35 on a non-rotatably connected to the cam 27 gear. A mounted at one end of the spindle 31 control device 32, for. B. a pivot arm 32 carries at its free end rollers 33 which each scan a cam 34 and a cover plate 36. The cam 34 is coaxial with the shaft 19 rotatably anchored to the side frame plate 18; the cover disk 36 is rotatable coupled to the rotation of the shaft 19.

The coupling of the cover disks 36; 28 to the rotation of the shaft 19 is made by two differential gear, which mesh with a shaft 19 on the rotationally fixed gear 37 and of which in the section of the Fig. 2 only the cover disc 36 driving differential gear 38 is shown. The differential gears are identical, here in the form of harmonic drive gears with ring gears 39; 41, a wave generator 42 and a flexspline surrounding the non-circular wave generator 42 and one with the ring gears 39; 41 meshing external teeth carries. The ring gear 39 is rotatably connected to a gear which meshes with the gear 37 of the shaft 19. The ring gear 41 drives via a shaft 43, a gear 44 in the interior of the side frame plate 18, which meshes with a coaxial with the shaft 19 and rotatably connected to the cover plate 36 gear 46. At the laterally led out wave generator 42 engages a belt drive 47 to a servomotor 48 which blocks a rotation of the wave generator 42 in the stationary state. The translation of the wave transmission 36 between the shaft 19 and the cover plate 36 and 28 is 1: 5/6, ie, one turn of the shaft 19 accounts for five-sixths turns of the cover plates 36; 28. By actuating the servomotor 48, the phase position of the cover plate 28 and 36 in relation to the shaft 19 is variable.

Fig. 3 shows a schematic side view of the folding blade 08 with the grippers 12 and folding blades 13 and the cam 27 and the cover plate 28 for controlling the gripper 12. The cam plate 27 has two peripheral portions 49; 51, z. B. depressions 49; 51, which, when scanned by the pivot arms 24 of the grippers 12, each drive an opening and closing movement of the grippers 12. The cam 27 is rotated so that the trough 49 controls opening of a gripper 12 at the moment in which the center line of one side product held by this gripper 12 passes the transfer nip 09. The trough 51 controls an opening and closing movement of the gripper 12, through which one of the belt 06 against the folding blade cylinder 08 pressed product is detected by the gripper 12, in the vicinity of the lowest point of the path of the product to the folding blade 08th

The cover plate 28 is circumferentially in three groups of six sectors 52; 53; 54 (or 52 _i , 53 _i , 54 _i , i = 1, ..., 6), which are not shown for clarity, loosely hatched or hatched. The six sectors 52 all have a small radius, so that the pivot arm 24 of a gripper 12, when passing along the trough 49 together with one of the sectors 52, can follow its course and accordingly control the opening and closing movement. The sectors 53 have alternately large and small radius, the sectors 53 ₂ ; 53 ₄ ; 53 ₆ with a large radius, as they pass along with a gripper 12, the recess 49, prevent the pivot arm 24 of the gripper 12 from immerse into the trough 49, so that the opening and shooting action does not occur. Among the sectors 54, one each has 54 ₁ and 54 ₄ small and the two following 54 ₂ ; 54 ₃ or 54 ₅ ; 54 ₆ large radius.

In the presentation of the Fig. 3 the phase angles of the folding blade cylinder 08 and the cover plate 28 are adjusted to one another so that the gripper 12 ₁ coincides with the trough 49 with the sector 52 ₁ . If the folding blade cylinder 08 continues to rotate, the gripper 12 ₂ hits the trough 49 on the sector 52 ₂ , etc., to the gripper 12 ₅ , which strikes the sector 52 ₅ . Next, the gripper 12 ₁ again reaches the trough 49 and hits the sector 52 _{6 there} . Thus, each gripper 12 opens as it passes through the trough 49, and a transfer of products to the jaw cylinder 11 can take place.

In the presentation of the Fig. 4 the phase angle of the cover plate 28 is changed with respect to the folding blade 08, so that the gripper 12 ₁ hits the sector 53 ₁ when passing through the trough 49. This has the small diameter, so that the gripper 12 ₁ opens. In a corresponding manner, the grippers 12 ₂ to 12 ₅ on the trough 49 together with the sectors 53 ₂ to 53 ₅ in the sequence. These have alternating large and small radii so that the grippers 12 ₂ and 12 ₄ pass through the trough 49 without going to open while the grippers 12 ₃ ; 12 ₅ open. Next, the gripper 12 ₁ coincides with the sector 53 ₆ , which has the large radius and prevents opening of the gripper 12 ₁ . The latter therefore passes through the transfer gap 09, without releasing the product held by it, so that in the subsequent rotation when passing the point of impact 10, a second product is applied to the gripper 12 ₁ . The gripper 12 ₁ engages the product when passing through the trough 51, and the next time through the trough 49 both products are released together. In this way, single-collection operation of one-page, cross-folded products is made possible.

In the configuration of Fig. 5 the cam 27 is rotated so that the trough 49 is located directly on the transfer gap 09. The extension movement of the folding blade 13 when passing the transfer gap 09 is blocked, as will be described in more detail later. The cover plate 28 is rotated so that as in the case of Fig. 3 Each gripper 12 when passing the trough 49 coincides with one of the sectors 52. Thus, any product that reaches the transfer gap 09, released and taken over by grippers, not shown, of the jaw cylinder 11. It will not receive folded, uncollected products.

Of course, also at the in Fig. 5 As shown orientation of the cam 27, the cover plate 28 are rotated so that the gripper 12 meet at the trough 49 each on one of the sectors 53. Then, a product supplied to an empty gripper 12 passes first through the transfer gap 09 without being released, and after a second product has been placed over it, both are released together at the transfer gap 09 and taken over by the jaw cylinder 11; that is, single-collective operation is realized with unfolded products.

In contrast, if the cover plate 28 is rotated so that the grippers 12 meet on the trough 49 on each of sectors 54, this leads to a product that has been picked up by an empty gripper 12 passes twice the transfer gap 09, each subsequent to the impact point 10, another product is placed over it, and in the third round, all three products are handed over together. Such Zweifachsammelbetrieb is generally not useful for products whose length corresponds to a printing plate, since only two different such products can be printed one behind the other from the two-field printing press and consequently are always the same among the three transferred to the jaw cylinder 11 products. However, if the length of the products is only two-thirds of a printing plate, the two-color printing machine can produce three products with different print images in succession, for which dual collection operation makes sense.

While in the Fig. 3 to 5 the distance between a gripper 12 and an adjacent folding blade 13 in approximately one-tenth of the circumference of the folding blade 08 corresponded, is in the in Fig. 6 As shown, the configuration reduces the distance between each gripper 12 and the folding blade folding a product held by the gripper 12 to one-fifteenth of the circumference of the cylinder. In this position, the folding blades 13 fold a product centered, whose length corresponds to 2/3 of the printing plate length. The cam 27 is compared to the orientation of Fig. 3 rotated by 12 ° clockwise, so that each gripper 12 meets exactly the trough 49 and releases the product held by him when the folding blade 13 acting on this product passes through the transfer gap 09.

In the configuration of Fig. 6 Each time, the grippers 12 on the trough 49 strike a sector 52 so as to release the product held by them. In this way, non-collecting operation with cross-fold is realized for products whose length is two-thirds of a printing plate length. As in Fig. 7 shown here, the orientation of the cover plate 28 may be set so that the grippers 12 meet on the trough 49 in each case on sectors 53. The resulting simple collection operation, however, makes only limited sense when the folder three different cyclically alternating products are supplied. It makes sense in this case, the in Fig. 8 shown configuration, in which the grippers 12 meet on the trough 49 in each case on sectors 54 and realize in this way dual-collecting operation.

The control of the folding blade movement is based on the FIGS. 9 and 10 explained that to the in Fig. 3 to 8 Similar representations of the folding blade 08, but now with the cam 34 and the cover plate 36, show. The cam 34 has a single peripheral portion 56, z. B. a trough 56 which is non-rotatable in a position facing the transfer gap 09, to control each case when passing the transfer gap 09, the extension movement of the folding blade 13. The cover plate 36, which controls the movement of the folding blade 13 together with the cam 34, is in the embodiment of Fig. 9 identical to the cover plate 28 described above and has three groups of sectors 52; 53; 54. In the orientation of Fig. 9 meet the folding blade 13 on the trough 56 each on sectors 52 that allow the extension movement. As can be seen, therefore, corresponds to the orientation of the cover plate 36 shown the non-collection operation (it does not depend on the length of the collected products for the control of the folding blades 13).

For single collection operation, orientation of the cover plate 36 is needed, in which the folding blades 13 on the trough 56 meet each on sectors 53, and for two-fiddle operation, an orientation in which they hit sectors 54 (not shown in the drawing).

In order for the basis of the Fig. 5 explained not folding operation to completely prevent the movement of the folding blade 13, are mounted on the spindles 31 supporting arms 29 of the folding blade 08 each actuators 57 which can press against the pivot arms 32 or other, not shown, carried by the spindles 31 pivot arms to prevent the pivot arms 32 from dipping into the trough 56. These actuators 57 may, for. B. be actuated electrically or pneumatically.

Furthermore, a method of the folding blade part of the collecting cylinder to the holding devices is conceivable, in the course of which the folding blades are stopped by mechanical devices.

In the embodiment of Fig. 10 the cover disk 36 has a fourth group of sectors 58, all of which have a large radius. In that the cover plate 36 is rotated so that the folding blades 13 on the trough 56 always hit sectors 58, they are prevented here from dipping into the trough 56, and the extension movement does not take place.

LIST OF REFERENCE NUMBERS

01

Material web, paper web

02

Cross cutter, cutting roller

03

Belt conveyor

04

deflecting

05

-

06

tape

07

tape

08

folding blade

09

Transfer gap

10

of impact

11

jaw cylinder

12

Holding tool, gripper

13

folding blade

14

Belt conveyor

15

-

16

paddle wheel

17

conveyor belt

18

Side frame plate

19

wave

20

-

21

Bearings, Rolling Bearings

22

poor

23

Spindle (12)

24

Control device, swivel arm

25

-

26

role

27

cam

28

cover disc

29

poor

30

servomotor

31

Spindle (13)

32

Control device, swivel arm (13)

33

role

34

Cam plate (13)

35

wave

36

Cover disc (13)

37

Gear (19)

38

differential gear

39

ring gear

40

-

41

ring gear

42

Wave generator

43

wave

44

gear

45

-

46

gear

47

belt drive

48

servomotor

49

Peripheral section, trough

50

-

51

Peripheral section, trough

52

sector

53

sector

54

sector

55

-

56

Peripheral section, trough

57

actuators

58

sector

Claims (11)

1. Folder for an m-field printing press, comprising a folder blade cylinder (08) which carries in each case a number n of folder blades (13) and holding tools (12) which are distributed uniformly around its circumference and are coupled in each case to a control device (32; 24) for driving a work movement, a stationary cam plate (34) scanned by the control device (32) of each folder blade (13) and a cover disc (36) coupled to the rotation of the folder blade cylinder (08) and scanned by the control device (32) of each folder blade (13), a stationary cam plate (27) scanned by the control device (24) of each holding tool (12) and a cover disc (28) coupled to the rotation of the folder blade cylinder (08) and scanned by the control device (24) of each holding tool (12), each cam plate (27; 34) comprising a circumferential section (49; 51; 56) controlling the work movement in cooperation with the control device (24; 32) and a section which does not control the working movement, the cover disc (28; 36) having a plurality of sector groups of sectors (52; 53; 54; 58), the sectors (52; 53; 54; 58) of one of the groups in each case being passed by the control device (24; 32) during successive revolutions of the folder blade cylinder (08), in succession in each case together with that circumferential section (49; 51; 56) of the cam plate (27; 34) which controls the work movement, at least in at least one of these groups one of these sectors (53₁; 53₃; 53₅; 54₁; 54₄) having a first radius which permits the cooperation of control device (24; 32) and circumferential section (49; 51; 56) for controlling the work movement, and at least one other of these sectors (53₂; 53₄; 53₆; 54₂; 54₃; 54₅; 54₆) having a second radius which blocks the cooperation of control device (24; 32) and circumferential section (49; 51; 56) for controlling the work movement, at least one of the groups comprising only sectors (52₁; 52₂; 52₃; ... 52₆) having the first radius, characterized in that the angular spacing between each holding tool (12) and a folder blade (13) which cooperates with a product held by the holding tool (12) is adjustable between π/n and πm/n(m+1), and in that at least one of the groups of the cover disc (36) scanned by the control device (32) of the folder blades (13) comprises only sectors (58) having the second radius.
2. Folder according to Claim 1, characterized in that the control devices (32) of the folder blades (13) can be fixed in a position in which they are prevented from coming into contact with at least each sector having the first radius.
3. Folder according to Claim 1 or 2, characterized in that the cover disc (28) scanned by the holding tools (12) is adjustable in phase between a folding mode position, in which it controls, as a work movement, a movement for releasing a held product when the middle of the product passes through a transfer point (09), and a non-folding mode position in which it controls the movement for releasing a held product when the leading end of the product passes through the transfer point (09).
4. Folder according to Claim 3, characterized in that the cover disc (28) scanned by the holding tools (12) is coupled via a differential gear (38) to the rotation of the folder blade cylinder (08), and in that, by rotation of an actuator shaft of the differential gear (38), the cover disc (28) is displaceable between the folding mode position and the non-folding mode position and, in the case of a fixed actuator shaft, the cover disc (28) retains the set folding mode position or non-folding mode position.
5. Folder according to Claim 3 or 4, characterized in that the cover disc (28) scanned by the holding tools (12) controls, as a further work movement, a gripping movement for fixing a fed product on the folder blade cylinder (08), and in that the folder blade cylinder (08) is wrapped around by a belt conveyor device (03) from a contact point (10) of the products to at least an angle corresponding to the freedom of the cover disc (28) to execute the displacement movement.
6. Folder according to any of the preceding claims, characterized in that the cover disc (36) scanned by the folder blades (13) is coupled via a differential gear (38) to the rotation of the folder blade cylinder (08), and in that, by rotation of an actuator shaft of the differential gear (38), the cover disc (36) can be displaced between a position in which the folder blades (13) pass that circumferential section (56) of the cam plate (34) which controls the work movement, in each case together with sectors (52; 53; 54; 58) of a first of the groups, and a position in which they pass the circumferential section (56) controlling the work movement, together with sectors (53; 54; 58; 52) of any other of groups.
7. Folder according to any of the preceding claims, characterized in that each group comprises six sectors (52; 53; 54; 58).
8. Folder according to any of the preceding claims, characterized in that one of the groups, designated as single collective operation group, has the same number of sectors (53) with the first and the second radius, which are scanned alternately by the control devices (24; 32).
9. Folder according to any of the preceding claims, characterized in that one of the groups, designated as dual collective operation group, has a sector (54₁; 54₄) with the first radius for every two sectors (54₂; 54₃; 54₅; 54₆) with the second radius.
10. Folder according to claim 8 and claim 9, characterized in that the sectors (53; 54) of the single collective operation group and of the dual collective operation group are adjacent to one another in pairs.
11. Folder according to any of the preceding claims, characterized in that an adaptation stage (03) for adapting the speed of products cut in a sheeter (02) to the circumferential speed of the folder blade cylinder (08) is arranged between the sheeter (02) and the folder blade cylinder (08).

Images