FR2678863A1 - PLIERS SYSTEM FOR PRINTING MACHINE SHEET GUIDE CYLINDERS. - Google Patents

Abstract

a) Gripper system for printing machine sheet guide cylinders. b) System characterized in that on the sheet guide cylinder (1) there is only a single-sided printing clamp (5) acting for single-sided printing and a system of double-sided printing clamps ( 3, 4) only effective for double-sided printing.

Description

i "Clamp system for cylinders guide-sheet machine

  The invention relates to a gripper system for printing machine sheet guide cylinders for printing the sheets either by single-sided printing or by double-sided printing, and

  the sheets being turned over according to the back-edge reversing principle for back-to-back printing, with only one guide roll being provided between the printing units and the pinched sheet by its rear end being taken for 'impression

  double-sided printing cylinder using a suction cup that only works for duplex printing, changing the operating mode15 from single-sided printing to double-sided printing or conversely requiring commutations of the gripper system. Such gripper systems fitted to printing machine sheet guide rollers for optionally printing the sheets with either one-sided printing or two-sided printing and

  whose sheets are turned over for double-sided printing according to the principle of reversing on a trailing edge, have been known for a long time. The machines of this type are equipped with at least three cycles.

  Transfer linders between printing groups.

  Thus, for example, document DE-1,107,246 describes a guide-leaf cylinder equipped with two mechanical gripper systems for returning the sheets in the case of double-sided printing.

  For simplex printing, the pin system

  which is upstream in the direction of scrolling

  leaves do not act for the transport of leaves.

  Each sheet is transferred only by the second system.

pliers, downstream.

  For this, the downstream gripper system is

  blocked so as to be applied against a stop

tongs).

  In print operation mode rec-

  on both sides, the two gripper systems are

  This is done in that the upstream gripper system grasps the trailing edge of the sheet; then the gripper system toggles with the sheet, under the contour of the guide-leaf cylinder, the sheet being

  transferred to the second gripper system which

  I have already described, also works for single-sided printing The second clamp system now pivots with the sheet turned outward and transmits this sheet thus returned to the clamp of the cylinder

next print.

  The second clamp system works from

  unlocked way for the operation in im-

front / back pressure.

  The disadvantage of both leaf guide cylinder clamp systems is that the second clip system which acts for simplex printing as well as for duplex printing must be designed to constructively fulfill the role of the two modes. of

  operation; this means that the pin system

  these must be designed in a compact way to

  to its functions for single-sided printing

  The compact design causes disadvantages in the case of double-sided printing in which the gripper system oscillates and requires the displacement of large masses. When printing on one side, the system of

  pliers is driven against the stops to be blocked

  Locking with the screws gives the system positional changes as a result of the tension which leads to sheet guiding inaccuracies.

and sheet transfer.

  According to EP-278 992 it is also known

  a single-sheet printing press

  corresponding to the type defined above and for which

  there is only one guide-leaf cylinder between printing groups, cylinder equipped with systems

  clamps for simplex printing as well as for

front / back pressure.

  The gripper system can be used according to the

  DE-1 107 246, only for the recom-

  to / verso is replaced in this sheet guide cylinder by a vacuum system For simplex printing as well as for front and back printing, a system must be provided behind the vacuum system.

  pliers to perform the functions mentioned above.

  on top for the second clamp system if you want

  take account of document DE-1 107 246.

  The second gripper system must be designed securely on this guide-leaf cylinder

  because when printing on the front, when

  the implementation for printing on the cylinders, it is necessary to exert significant efforts The solid realization nevertheless requires the training of large masses for the printing recto / verso, culminating

to dynamic imbalances.

  DE-AS 1786271 discloses a cylinder

  dre guide-sheet for equipped printing machine

  a suction cup, a first mechanical clamp and a

do not second mechanical clamp.

  In single-sided operation mode, only the second mechanical clamp that has been attached for this purpose, operates In the duplex printing operation mode, the sheet is returned by the suction cup

  as well as by the first and the second mechanical clamp

  that the mechanical clamps are movable os-

  This function machine

  pressure has only one guide cylinder

  sheet between the printing groups but we meet

  the same disadvantages as in the case of

  China according to DE-1 107 246.

  According to DE-OS 3 533 081,

  a recent system of pliers is being

  seen for the implementation of machines for printing

  one side and for duplex printing.

  The single guide-sheet cylinder between the printing units has a clamp provided for both simplex and duplex printing, the sheet with the leading edge facing forwards towards the clamp of the printer. In addition, the guide cylinder has a second clamp designed as a pivoting clamp and which acts only

  in the double-sided printing operation mode.

  For double-sided printing, a tamper

  accumulator or storage drum that does not act for simplex printing mode; the sheet is then transferred from the fixed clamps with the front edge

turned forward.

  Then the leaf is received by the claws of

  grip on the rear edge and the cylinder

next print.

  The disadvantage of such a printer machine

  sea is to require in addition, below the cylinder

  guide-sheet, an accumulator drum for the impres-

  front / back, which results in a high-rise machine. On the basis of these disadvantages, the object of the present invention is to create a gripper system for sheet-guide cylinders for the choice of double-sided printing and reprinting by low-construction printing machines, which make it possible to single-sided printing, an exact transfer of the sheet through the gripping system while

  by having low-mass clamps for the purpose of

front / back pressure.

  For this purpose, the invention relates to a system of the type defined above, characterized in that on the

  leaf guide cylinder there is only one clamp of printing-

  one-sided operation for simplex printing and a system

  two-sided printing clamps; not acting

only for double-sided printing.

  According to another characteristic of the in-

  vention, the guide-leaf cylinder has only one

  one-sided printing forceps which acts only for printing

  recto and a system of double-sided pliers that

  only works for double-sided printing.

  The invention offers the advantage of providing on machines of this type a complete separation of the gripping systems for the different operating modes. The curved guide cylinder comprises a front printing clamp (used only for the front printing) as well as a clamp system for double-sided printing (use only for

double-sided printing).

  This allows each system to be designed

  clamps according to the requirements of the operating mode

respectively.

  The simplex printing clip can be made

  The front / rear gripper system

  it can be made lightly at least for the second clamp (light construction clamp).

  results in small masses being oscillated-

tion.

  When the gripper system for printing

  The front and rear suction cup is suction cup / sucker, that of the suction cups that takes the back edge of the sheet can be designed as a suction sill, closed It is thus possible to increase the suction force The adjustment of the clamp system in case

  change of mode of operation is without

  ficulty The fast printing clamp is designed for double-sided printing and can be converted with reduced means, ie it can be ordered

  to pass under the contour of the guide-leaf cylinder.

  The present invention will be described in a manner

  More in detail with the help of exemplary embodiments In the drawings: FIG. 1 is a schematic diagram of a

  sheet guide cylinder equipped with a gripper system.

  FIG. 2 is a block diagram of a guide-leaf cylinder equipped with a second variant

clip system.

  FIG. 3 is a schematic diagram of a guide-leaf cylinder equipped with a third variant

  clip system (double-sided printing).

  FIG. 4 is a block diagram of a guide cylinder and a printing machine.

  three guide cylinders between the groups of im-

pressure.

  Figure 5 shows another way of reali-

of Figure 4.

  Figure 6 shows a device for adjusting

age of the clamp stop.

  Figure 7 shows an installation for

  change the setting of the gripper system.

  Figure 8 shows a conversion of the

  front printing clip according to a third variant.

  FIG. 9 is a top view corresponding to

laying in Figure 7.

  Figure 10 shows the position of the pin-

  this recto printing according to Figure 8 for the impres-

front and back.

  Figure 11 shows the guide cylinder

  sheet according to Figure 3 for the single-sided printing of

the transfer of a sheet.

  FIGS. 1 to 5 show a block diagram of a sheet-guide cylinder 1 of a sheet-by-sheet press, used either for back printing (S-printing) or for front and back printing

  (S / W printing) Such sheet-fed presses are

  are known and arise from the state of the art

according to the documents.

  The sheet guide cylinder 1 is preceded and followed each time by a cylinder shown in an indicative manner, namely a printing cylinder 2 1, 2 2 (the printing cylinder 2 2 is only shown to

Figures 3, 4 and 11).

  The gripper system consists, when

  look in the opposite direction of the rotation direction of the cy-

  liner guide 1 (according to FIGS. 1 to 3, 7 and

11), a suction cup 3.

  According to Figure 1, the sucker 3 is followed

  a clamp 4 and a back printing clip 5.

  The suction cup 3 and the clamp 4 form the system

  gripping head 3, 4 for double-sided printing

(S / W).

  These clips are not used for

back pressure.

  The gripper 4 and the back printing clip 5 comprise a gripping finger 14 and a gripping stopper 13 The suction cup 3 and the gripper 4 are shown in FIG.

  on pivot axes 6 1; 6 2 and are

  bent by toothed segments 7 1; 7 2 secured to the pivot axes 6 1; 6 2 The training of the

  plunger and clamp 3,4 is ensured through

  A cam follower 8, a cam follower 9, a gate lever 10, and a toothed disk 49 forming a cam gear 8, 9, 10, 49 have the cam 8 fixed to a cheek. 11 of the machine The roller bearing lever 10 is provided with a toothed segment 49 which is associated with the toothed segment 7 1 A spring of

  compression 18 acts on the clamp 4 against the face la-

  11 of the guide cylinder sheet.

  According to the variant of FIGS. 2 to 3, the pin-

  this 4 is replaced by a second sucker 16 La

  first and second suckers, 16, form the system

  The foregoing printing clip 5 is further shown in FIG. 2 in the back printing position (this

  is surrounded by a broken line).

  According to the embodiment of FIG.

  the back printing clip 5 is surrounded by a first

  first and second suction cup 3, 16, that is to say

  that the gripper system is placed on the guiding cylinder

  de-feuille 1 in the following order: first sucker

  3, back printing clip 5, second suction cup 16.

  According to this variant, the clamp 3 and the forceps 16 form

  Also, the printing clamp system rec-

  to / verso 3, 16 The clamp stop 13 is mounted securely

  on the pivot axis 6, 2 of the suction cup

  16 and the gripping finger 14 is mounted integrally-

  on the pivot axis 6 1 of the suction cup 3.

  The two pivot axes 6 1, 6 2 are also coupled by toothed segments 7 1; 7 2 and are driven by the cam transmission 8, 9, 10, 49 (not shown). At the clamp stop 13 is associated a cam

  pivoting, mounted on the guide cylinder 1.

  In the duplex printing phase (FIG. 3), this cam is disengaged from another stop 51 of the clamp stop 13 and in the printing position towards the stop of

  clamp 13 is blocked by another stop 51 The impres-

  the reverse side appears in Figure 11 (transfer of

  sheets to the impression cylinder 2 2).

  According to the embodiment of FIGS. 4 and 5, the printing machine comprises three cylinders 1, 17, 18 between the printing units.

  sheet guide cylinder 1 is an accumulating cylinder

  lateur 17 of double dimension, itself preceded by the cy-

transfer liner 18.

  The drawings also show the two cy-

  2 1 and 2 2, the guide cylinder

  sheet 1, the impression cylinder 2 as well as the

  Transfer liner 18 which have a single diameter.

  According to Figure 4, the gripping system for

  the double-sided printing 19 is in the form of a clip 19.

  The clip 19 is followed by a printing clip

  Figure 4 shows two phases of

  sheet turning for double-sided printing.

  According to FIG. 5, the first known suction cup 4 according to FIGS. 1 to 3, 7 and 11 is replaced by a first clamp 20 which forms with the clamp 4,

  the duplex clamp system 20; 4.

  The clamp 4 is followed by a printing clip

  5 also shows two phases of the reversal of the sheet for simplex printing

and back.

  The front 5 printing clip is composed

  in all variants according to Figures 1 to 5 of

  clamp stop 13 and a clamp finger 14 The clamp finger 14 is mounted as shown

  in FIG. 3, on the pivot axis 6 6 of the

  3 As in the embodiment of FIGS. 1 to 5, the simplex printing clip touches the cylinder

  printing 2 1 and / or 2 2 outside the parking area

  nal 21 of the printing cylinder 21; 2 2, it is necessary to avoid damaging the impression cylinder 2.1; 2 2, and not to damage itself, to be controlled under the periphery of the cylinder guide-sheet 1 for

double-sided printing.

  FIGS. 6 to 11 are variants of the transformation of the gripper system according to the embodiment of FIGS. 1 to 5 in case of a change of

operating mode.

  Figure 6 shows on a large scale, the pin-

  This gripper finger 14 is mounted on the gripper axis 15 also carrying the lever 22 of the roller 23 of the control drive of the grippers 24, 23. , 22 The roller 23 is associated with a curve of

  clamp cam 24 fixed on the guide cylinder 1.

  The clamp stop 13 is adjustable in height in a three-point assembly, thanks to rollers

guide 48.

  For double-sided printing, the clip stop 13 is lowered; for simplex printing, the

  clamp stop 13 is at the periphery of the guiding cylinder.

  de-feuille 1 by its upper edge.

  At the recto printing, a bent abutment 26 cooperates radially outwards against the abutment

  clamp 13; this stop is mounted adjustable from

  it is fixed at the pivot point 27 by means of a

  tightening connection The abutment 26 is provided with both ex-

  In addition, in order to limit the

  the end position of the clamp stop 13 for simplex printing, a pa-

  link 28 upper A tension spring 30 acts

  be the stop 26 This spring is hooked by an ex-

  the end of the clamp 13 and the other end

  at the point of attachment 31 of the guide-leaf cylinder 1. For the duplex printing, the clamp connection 27 of the stop 26 is loosened; the stop 26 pivots to release the clamp stop 13 relative to the stop 26 The tension spring 30 pulls the clamp stop 13 between the guide rollers 48 under the contour of the guide cylinder-sheet 1, against the stop

26 lowered.

  The stop 26 is pivoted sufficiently so that with the other end it cooperates against the finger

  of clip 14 so that it also comes

  Under the circumference of the sheet-guide cylinder 1 Due to the pivoting of the gripper shaft 15, by the stop 26, the roller 23 is raised with respect to the curve of

clamp cam 24.

  The guide position for the simplex printing of the simplex printing press 5 according to FIG. 6 is represented in solid line. The position of the elements

  for double-sided printing is repre-

interrupted.

  Figure 7 shows mechanisms for transforming the gripper system during a change

operating mode.

  FIG. 9 is a top view corresponding to

in figure 7.

  A switching disc 35 is provided on a central wheel 32 which can be engaged by a clutch 33 with an adjusting wheel 34. The switching disc can be put in two end positions by coming against a stop 36 by means of the adjusting wheel 34 and the central wheel 32 The lever 37 is hingedly mounted on the switching disk 35 This lever is connected in a mobile manner

  in rotation at the pusher 38 There are in all three pushes

  evening 38 The pusher 38 is guided in a sliding guide 39 which can act against the clamp stop 13, against the gripper finger control transmission 24, 23, 22 and against the cam transmission 8,

  9, 10, 49 to drive the printer clip system.

front and back 3; 4 or 3; 16.

  Figure 7 shows the guide cylinder

  1 in the operating mode corresponding to the

front pressure.

  It appears that the pusher 38 acts against the clamp stopper 13. The gripping finger control transmission 24, 23, 22 is unlocked.

  cam transmission 8, 9, 10, 49 is blocked.

  37, the pusher 38 and the guide 39 are provided

  multiple way for example in triplicate.

By pivoting the switching disk 35 in the second position, not shown, the pusher 38 located under the clamping abutment 13 is lowered so that the spring 30 associated with the clamp stop can

  pull the stop 13 under the contour of the guide cylinder

  sheet 1; at the same time, the cam transmission 8,

  9, 10, 49 is unlocked and the communication transmission

  clamp fingers 24, 23, 22 locks so that the clamp finger 14 is depressed in the same manner

  below the contour of the guide cylinder 1.

  A third variant of the switching of the simplex printing clip 5 appears in FIGS.

and 10.

  According to this embodiment, the finger of

  pliers 14 is lowered under the contour of the guiding cylinder.

  de-feuille 1 when the clamping stop 13 is fixed, for the recto / verso printing by pivoting of the clamp-holder shaft 15 For this, the clamp-holder shaft 15 is mounted at both ends in pivoting levers

of the guide cylinder 1.

  With the aid of a double pivoting latch 43, 46, the clamping pin 15 can be locked without play against the prisms 42. The double blade 43, 46 is connected to a

  another roller 44 which is associated with a cam 45 escamo-

table.

  The left blade 46 of the double-blade assembly 43, 46 acts against the pivot lever 40 and thus against the gripper shaft 15; the straight blade 43 is associated with the gripper finger control transmission 24, 23, 22 A spring 41 pushes against the pivoting lever 40; the spring 41 acts against the

left blade 46.

  Fig. 8 shows the simplex printing clamp 5 in operating mode corresponding to the simplex printing; Figure 10 shows this same

  clip in double-sided printing position

  one-sided printing on the recom-

  to / verso is also by pivoting the retractable curve 45 in the upper position At the same time the other roller 44 pivots in the direction of the arrow The left blade 46 thus unlocks the pivoting lever 40 and thus the pinch-holder axis At the same time, the straight blade 43 locks the gripper finger control transmission 24, 23, 22 after the gripper finger 14 has slid over the extension of the gripper abutment arm 13 1, to pass under the contour of the gripper finger. Cylinder guide 1 The switching of front and back printing on single-sided printing is

done in reverse order.

  The device according to the invention operates as follows: For simplex printing, only the clip

  The 5-way printing system

  front and back pressure 3, 4; 3, 16 or 19 or 20, 4 is stopped. In double-sided printing operation mode, only the printing clip system

  front / back acts 3, 4 or 3, 16 or 19 or 20, 4.

  The front-side printing clip 5 is stopped in this operating mode In the variant of FIGS. 3 and 4, the front-side printing clip 5 continues to oscillate without any result for the front and back printing. For single-sided printing, the sheet 47 is transferred in known manner from the simplex printing press 5 of the guide-sheet cylinder 1 to be taken up by the printing cylinder 21 upstream and transferred to the printing cylinder. 2 2 downstream, o

  another color is applied for the recurring

  to. According to the embodiment of FIG. 1, for double-sided printing, the suction cup 3 takes the rear end of the sheet 47 to pass the sheet under the contour of the sheet-guide cylinder 1 and transfer it to the clip 4; this clip is released outwards with the sheet 47 and transfers it to

  impression cylinder 2 2 after having returned it.

  According to the embodiment of FIGS.

  and 3, the sheet 47 is transferred during printing.

  front and back, by the suction cup 3 to the second

  alle 16 to be supplied to the impression cylinder

2 2 downstream.

  According to the embodiment of FIG.

  the sheet 47 is taken by the clip 19 at the ar-

  of the storage drum 17 to be returned and

  supplied to the impression cylinder 2 2.

  In the variant of Figure 5, the sheet 47 is taken at the rear edge by the first clamp 20 to be transferred to the clamp 4 and then returned and supplied to the printing cylinder 2 2 The front printing clamp 5 must come as in the embodiment of Figures 1, 2, 3, 4, 5 in duplex printing mode, under the contour of the guide cylinder-sheet 1; this can for example be done as explained and described above using three variants according to FIGS. 6 to 10. In the same way, according to FIGS. 7 and 9, it is necessary to transform

  the double-sided printing forceps 3, 16 The trans-

  training was described in the same way above.

  The known transformations or commutations do not

  would be inventive here.

LIST OF REFERENCES

2 1

2.2

3, 4; 19; 20, 4

4 6.1; 7.1;

8, 9,

  it 12 17 21 22, 6.2 7.2, 49 cylinder guide-sheet printing cylinder printing cylinder suction cup system clamps printing recto / verso clamp printing clamp simplex pivoting shafts segment toothed cam transmission cam follower cam follower roller lever side flange of the cylinder for the guidance of the sheets compression spring clamp stopper clamp finger clamp axis second suction cup

intermediate or storing cylinder

  kage transfer cylinder clamp first clamp zone of the channel lever roller control cam of the clamp 23, 24 transmission of the finger control of the clamp 30 35 40 45 50 control cam right angle stop clamping connection; Axis block Upper bearing Traction spring Bearing point Center wheel Clutch Adjustment wheel Switching disc Stopper Lever Pusher Actuator lever Pivoting lever Prism spring Straight blade Other roller Curve retractable Left blade Leaf Guide roller Disc toothed cam Swivel cam Other stop

Claims (11)

CLAIMS) Clamping system for printing machine sheet guide cylinders permitting printing of the sheets either by recoil printing or by recto / verso printing, and the sheets being returned according to the principle of reversal on back edge for double-sided printing, a single sheet-guide cylinder being provided between the printing units and the pinched sheet by its rear end being taken for double-sided printing, from the printing cylinder to the using a suction pad that only works for double-sided printing, changing the operating mode from one-sided printing to duplex printing or vice versa requiring system switching of pins, characterized in that on the sheet guide cylinder (1) there is only one front printing press (5) acting for simplex printing and a clamp system of double-sided printing (3, 4) (3,   16), only for double-sided printing.   ) Gripper system for cylinders   printing machine sheet guide for   select one of the sheets on the front, on the front and on the back, and in which the sheets are turned according to the principle of reversing on the back edge for printing on both sides, three cylinders   sheet guide being provided between the cylinders of im-   pressure whose third guide-leaf cylinder is   equipped with the sheet maintenance system for the   double-sided pressing and changing the operating mode   to switch from single-sided printing to   front and back pressure and vice versa   manipulation transformations of the preheating system   characterized in that the guide cylinder   sheet (1) has only one printing clip   to (5) which acts only for simplex printing and a simplex printing clip system (19) which does not act   only for front and back printing.   3 B) Clamping system for printing machine sheet guide cylinders for selectively printing the sheets by either single-sided printing, or front and back printing, and in which the sheets are turned over according to the principle of turning over on rear edge for back and front printing, three guide rolls being provided between the printing rolls, the third guide-sheet roll being provided with the sheet holding system for front and back printing, and in the case of change of operating mode for   switch from one-sided printing to single-sided   so and vice versa, it is necessary to perform commutations at the gripper system, characterized in   the guide-leaf cylinder (1) only comprises   one-sided printing clip (5) that acts only for simplex printing and a duplex clip system   (20, 4) which acts only for double-sided printing.   4-) Clamp system according to the claims   1 to 3, characterized in that the printing clip   front view (5) is in the form of a clip   comprising a stop (13) and a gripper finger (14).   ') Gripper system according to claim   1, characterized in that the gripper system of   double-sided pressure (3, 4) consists of a suction cup (3) and a clamp (4).   60) gripper system according to claim   1, characterized in that the gripper system of   double-sided pressure (3, 16) consists of a first   suction cup (3) and a second suction cup (16).   Gripper system according to Claim 1, characterized in that, in the direction of rotation of the guide-leaf cylinder (1), the front printing press (5) is provided behind the gripper system.   double-sided printing (3, 4); (3, 16).   Clamping system according to claim 1, characterized in that the front printing clamp (5) is provided between the first suction cup (3) and the second suction cup (16).   9 *) gripper system according to the claims   1 and 8, characterized in that the finger (14) of the front printing press (5) is associated with the pivot axis (6 1) of the suction cup (3) and the clamp stop (13). is associated with the pivot axis (6 2) of the second sucker (16).   *) Clamp system according to the claims   1, 2, 3, characterized in that the clip of   front pressure (5) is tangent to the impression cylinder.   (2 1, 2 2) for double-sided printing, in   out of the channel area (21) of the impression cylinder (2.1, 2 2).   110) gripper system according to the claim   2, characterized in that the gripper system   double-sided printing device (19) is a clip (19).   12-) Clamp system according to the claim   3, characterized in that the gripper system   double-sided printing (20; 4) is in the form of   first clamp (20) and clamp (4).   ) Clamp system according to the claims   1, 2, 3, characterized in that the clip of   pressure (5) goes below the contour of the cy-   liner guide (1) for front / back printing n.   14-) Clamp system according to the claims   1, 2, 3, 13, characterized in that the abutment of   clip (13) of the simplex printing clip (5) is   glable in height in the radial direction.   E) Clamp system according to the claims   1, 2, 3, 13, characterized in that the gripper finger (14) can lock under the cylinder contour   guide (1) for the correct operating mode   responding to double-sided printing.   16-) Clamp system according to the claims   1, 2, 3, characterized in that the clip stop (13) of the simplex printing clip (5) is held by   a three-point mounting with guide rollers (48).   17) Clamp system according to the claims   1, 2, 3, 16, characterized in that the stop of   clip (13) of the simplex printing clip (5) is   able to be positioned in two end positions   stroke with a bent stop (26).   180) gripper system according to the claims   1, 2, 3, 16, 17, characterized in that the clip stop (13) of the simplex printing clip (5) can be moved closer to the printing position recto a fixed stop (28).   19) Clamp system according to the claims   1, 2, 3, characterized in that the abutment bent   (26) is associated with the finger (14) of the printing clip.   front view (5) for the printing position rec- to / back.   20 *) Clamp system according to the claims   1, 2, 3, characterized in that the gripper axis (15) is mounted to pivot radially in the guide cylinder (1) with the gripper finger (14) and the pivoting levers (40) and the lever (22) and roller (23) of the finger control transmission of clip (22, 23, 24).   210) gripper system according to the claims   1, 2, 3, 20, characterized in that the pin axis   this (15) of the simplex printing clip (5) is mounted in the prisms (42) for the simplex printing position.   220) gripper system according to the claims   1, 2, 3, 20, characterized in that for ver-   rust the gripper shaft (15) in the simplex printing position and in the duplex printing position it is   provided a blade (43, 46) controlled by means of a   be (45) reentrant and another roller (44).   23-) Clamp system according to the claims   1, 2, 3, 20, 21, characterized in that the left blade (46) is associated for simplex printing with   pivoting lever (40) and the right blade (43) is associated with   for double-sided printing on the lever (22) of   the gripper control transmission (22, 23, 24).   24 e) Gripper system according to the claims   1, 2, 3, characterized in that a pusher (38)   connected to a lever (37) and guided in a sliding guide   sant (39) is associated with the clamp stop (13) at the gripper control transmission (22, 23, 24) and with the   cam transmission (8, 9, 10, 49).   250) gripper system according to the claims   1, 2, 3, 24, characterized in that the lever (37) is associated with a switching disc (35) which can be placed against a stop (36) for one of the   two end positions and the drive disc   (35) is preceded by a central wheel (32) and an adjusting wheel (34) engageable by a clutch (33) with the central wheel (32).   260) gripper system according to the claims   1 and 8, characterized in that at the gripper stop (13) for simplex printing a pivoting cam (50) can be associated to lock the gripper stop (13).