EP2059468A1

EP2059468A1 - Register insertion apparatus

Info

Publication number: EP2059468A1
Application number: EP07800624A
Authority: EP
Inventors: Beat Kägi; Urs BRÜHWILER; Bozidar Markovic
Original assignee: Gietz AG
Current assignee: Gietz AG
Priority date: 2006-09-03
Filing date: 2007-08-30
Publication date: 2009-05-20
Anticipated expiration: 2027-08-30
Also published as: CN101511714A; US20100148428A1; RU2009111212A; ATE531658T1; WO2008028309A1; CN101511714B; US8196307B2; RU2436722C2; EP2059468B1

Abstract

The register insertion apparatus for sheet-fed embossing machines with position sensors (S1, S2, S3) for detecting printing marks (P1, P2, P3) of a sheet (5), comprises a register plate (15) capable of being pivoted down as feeder table with ventilation openings (20) and vacuum feed lines (21) to a suction apparatus (22) and front stops (12), which are capable of being lowered and actuators (L1, L2, L3) for positioning the register plate in X-direction and in Y-direction. With a register controller (11) the register plate (15) is pivoted down, a gripper bar (8) is brought up to it, the register plate pivoted up again, then a sheet (5) is fed-in and stopped at the front stops (12). Thereupon the register plate is evacuated for sucking on and fixing the sheet on the register plate. Then the positions of the printing marks (P1, P2, P3) are detected by the position sensors, from this the register correction values (X1, X2, Y3) are calculated and the register plate by means of the actuators (L1, L2) in X-direction and by means of the actuator (L3) in Y-direction is moved into the desired position (P1S, P2S, P3S). Then the sheet is gripped by the gripper bar, the register plate (15) is ventilated and the sheet is transported on by the gripper bar. This results in an automatic register correction at high machine speeds and with the highest print quality.

Description

REGISTER FEED DEVICE

The invention relates to a register feed device for sheet embossing machines according to the preamble of claim 1. Such an automatic register feed device is e.g. known from EP 0 708 046 or US Pat. No. 5,718,057.

5 Here, a non-fixed sheet is moved by means of position sensors and print marks, controlled by two front stops and a side stop, which are each moved by actuators, in a desired position. This register positioning of a non-fixed sheet by front and side stops, however, still has significant limitations and disadvantages. Especially at higher o speeds, the register shifts can be at an unfixed

Sheets can no longer be executed quickly and precisely enough because the sheet is increasingly warped or compressed.

So far, the register positioning of the bow was therefore normally set and adjusted by hand. Such a flat embossing machine is e.g. in EP 0 858 888.

The object of the invention is therefore to provide an automatic register retracting device for higher performance, which overcomes the disadvantages and with which for each sheet individually optimally and automatically all register errors are corrected o and which printing and embossing images in the same consistently highest

Quality possible. This object is achieved by a erfmdungsgemässe register feed device according to claim 1.

The dependent claims relate to advantageous developments of the invention. 5 These concern further improvements in register functions and characteristics and allow for a wider range of applications and higher machine performance. In the following the invention with reference to examples and figures will be further explained. 1 shows a register feed device according to the invention with a pivotable, movable register plate with ventilation openings and vacuum supply lines, FIG.

2 shows a register plate with swiveling front stops,

3 shows a register plate with vents in various 5 suction areas and with a front squeegee in plan view,

4 is a register plate with vents in cross section,

5a, b, c examples of vents,

Fig. 6 shows an arrangement of actuators with linear motors, a

Carrier plate with cross slide and support bearings for a register plate,

Fig. 7a, b register diagrams with a timing of the

Register functions over one machine cycle,

8 shows a register plate with an inlet plate,

9 a register plate with suction plates, 5 FIG. 10 a suction plate, FIG.

11 shows schematically a register control,

12 shows an embossing printing machine with a register feed device. 1 shows a register feed device 10 for sheet embossing presses with position sensors S 1, S 2, S 3 for detecting printing marks P 1, P 2, P 3 of a sheet 5, which define the front edge and the side edge of a printed image, with a register plate 15 as a feed table, which can be pivoted, with vent openings 20 and vacuum feed lines 21 to a suction device 22 and front stops 12, which are lowered, and with two actuators Ll, L2 for positioning the register plate in the X direction and an actuator L3 for positioning in the Y direction and with a register control 11, for controlling the register functions and components. The register plate 15 forms a feed table or a support plate, which the sheet 5 rests on for transfer to the gripper bar. 8

In this case, the register plate 15 is pivoted 15 'for the passage of a gripper bar 8, which is connected to a drive chain 32 of the embossing machine 1. Then, the gripper bar is stopped and the register plate swung open again and fed a sheet 5 of a feeder 3 on the register plate until it is stopped at the front stops 12. Then the register plate is evacuated to suck and fix the sheet 5 on the register plate 15. Subsequently, the front stops 12 are lowered (12 ¹ ) and the index plate is advanced by the actuators Ll, L2 in the X direction and thereby the sheet 5 on the

Claw bar 8 postponed and thereby also detects the position of the print marks Pl, P2 on the sheet with the sensors Sl, S2 and calculates a residual shift Xl, X2 and moved the register plate with the sheet in the X direction in the desired position PlS, P2S and after the position of the print marks P1, P2 in the X direction is detected by the sensors S 1, S2, the register plate is moved by the actuator L3 in the Y direction to the target position P3S, by analogy, the side edge print mark P3 detected by the sensor S3 and a lateral residual shift Y3 is calculated. After the register alignment has been completed, the sheet 5 is detected by the stationary gripper bar 8, in which the gripper to be closed. Then the register plate 15 is vented and the sheet thereby released from the register plate, so that it can be transported by the gripper bar 8 on the lowered front stops 12 away in the next station (here a flat press 2). As will be further explained with respect to FIGS. 7a, b, the register movements of the actuators in the X direction and in the Y direction can take place one after the other (FIG. 7a) or they can also take place partially simultaneously (FIG. 7b). For precise register alignment, the sensor S3 may also be placed near the front edge of the registration plate (S3 ¹ ).

Preferably, the registration plate 15 may be pivotable about an axis of rotation 16 and moved by a machine drive 30, here e.g. by means of a cam 31. This results in a simple high-dynamic and precise drive of the register plate 15, synchronously with the machine.

Fig. 1 further shows front position sensors Sl, S2, which are adjustably mounted on a fixed frame above the register plate 15. These can preferably be arranged at a small distance d of, for example, 1 to 3 mm in front of the front print marks P1, P2 when the sheet 5 is stationary (when it has arrived at the front stops 12). Then, the position of the print marks P1 ₅ P2 is rapidly detected upon initial advancement of the register plate, and there is more time for the calculation of the residual displacements Xl ₅ X2 by the controller 11 ₅ so that the register plate 15 goes directly to the target positions PlS, P2S with total displacements X4 ₅ X5 can be moved and the movement of the actuator L3 in the Y direction can begin earlier. Analogously, Y is also moved directly into the position P3S with a total displacement Y6 in the transverse direction Y.

In the X direction, the basic shift XO (without register correction) is e.g.

9 mm and it can be in a range of eg 5 - 12 mm. In the Y direction, the basic shift YO can be in a range of eg 4 - 8 mm and, for example 5 mm. The total shifts = basic shift + calculated

Residual shift are then:

X4 = X0 + X1, X5 = X0 + X2, Y6 = Y0 + Y3

It is also possible to manually input additional image pressure correction values X 1.1, X2.1, Y3.1 into the register controller 11. Then the total shifts result to:

X4 = X0 + X1 + X1.l, X5 = X0 + X2 + X2.1, Y6 = Y0 + Y3 + Y3.1 Such additional correction values may e.g. serve to determine differences between an existing image and a subsequent imprinting applied to the existing image by eye and to input corresponding correction values until agreement is reached. The register positioning can also be applied to sheets which have no print marks P1, P2, P3. Then, the front and a side sheet edge serve as print marks, which are detected by the correspondingly adjusted position sensors Sl, S2, S3.

Fig. 2 shows, for example, a register plate 15 with a simple embodiment of the lowerable front stops 12, which are pivotally mounted on a holder 13 about an axis. The holder is rapidly moved on both sides by a respective pneumatic cylinder 14, i. swung up and down (12 ').

In order to achieve high machine speeds and reliable precise operation of the register device, the sheet 5 must be fixed quickly and without distortion on the register plate 15, which as a whole can perform the register positioning in X and Y direction quickly and accurately, so that the sheet in the desired position can be transferred exactly defined to the gripper bar 8. For this purpose, fixing and releasing the sheet by means of venting and ventilation must be carried out quickly, thus allowing as much time as possible for register positioning is available. With the erfmdungsgemässen register feeder therefore a rapid suction and fixation of the sheet and a secure adhesion to the register plate 15 (without slipping) achieved: on the one hand by appropriate design of the vent with little void volume and rapid response and by arranging and dimensioning of vents 20 and leads 21st and on the other hand also by an optimal static friction on the surface 19 of the register plate. The function of an inlet plate 35 with a fixed axis of rotation 36 and sliding blocks 37 for guiding an incoming sheet 5 close to the register plate 15 is further explained using the example of FIG.

3 to 5 show examples of register plates 15 with vents 20, vacuum feed lines 21, valves 23 and suction device or vacuum devices 22 for quick and secure fixing of the sheet 5 on the register plate. For this purpose, the surface 19 is locally formed in the vicinity of vents 20 with a good stiction.

Fig. 3 shows in plan a register plate 15 with different suction areas Bi and with a front squeegee 17, on which the front edge of a sheet 5 rests. Here, the sheet on the squeegee in the foremost region 17 is particularly well fixed by an increased suction power to the squeegee 17 compared to the suction or to the contact pressure and the static friction force on a rear suction plate 18th

For this purpose, the register plate suction areas Bl, B2, ... with different, adjustable suction and / or with separate vacuum supply lines 21. The suction areas can differ by:

- The number and arrangement of the ventilation openings 20 (many on the squeegee 17, relatively few on the suction plate 18) and through - Subdivision into individual chambers, which are each connected to a vacuum supply line 21 and a valve 23: here, the areas Bl to B5 on the squeegee 17 and B6 to B8 on the suction plate 18th

Thereby, e.g. the areas Bl to B5 and B7 are ventilated and vented and the areas B6 and B8 remain open (not vented), so that the sheet 5 is fixed particularly well, quickly and safely especially in the foremost area 17 at the front edge 29.

Fig. 4 shows the register plate 15 of Fig. 3 in section A-A. In the foremost region 17, the chamber of the region B 1 with separate supply line 21 and valve 23 and in the rear suction plate 18, the chamber of the region B6 with separate supply line 21 and valve 23 is shown here. In the vacuum device 22 with a vacuum reservoir, e.g. a negative pressure of -0.6 bar is generated.

The surface 19 of the index plate has partially around the vent holes 20 around an increased static friction, for example, it may be roughened or made of anodized aluminum. Especially in the forefront 17, e.g. on a front squeegee, an increased static friction is sought. To this end, the squeegee 17 may also be covered with a rubber layer 24 (e.g., 0.5 mm rubber coating).

FIGS. 5a, b, c show examples of vent openings 20 which are widened against the surface 19 of the register plate. The area of the ventilation openings is larger at the top of the surface (eg with diameter = 3 mm) than at the bottom of the side of the vacuum supply lines 21 (eg diameter = 1 mm). Fig. 5b shows a section through a suction plate 41 with an oblique slot 42, which are shown in Fig. 8. Fig. 5c shows a vent 20, which is slit-shaped above (eg 3 x 12 mm) and below three smaller holes (1 mm). Thus, the contact surface and the contact pressure on the register plate 15 is increased and the bow fixed better.

In order to be able to align the register plate 15 quickly and accurately, high-dynamic, precise actuators L1, L2, L3 are used, e.g. Servo motors with spindles. The moving masses of the register plate 15 are kept as deep as possible with their drive device, e.g. also by aluminum construction. Advantageously, can be used as actuators linear motors.

Fig. 6 shows, as also shown in Fig. 1, a light, highly dynamic and precise drive device of the register plate 15, which Lmearmotoren 25, a support plate 26 with linear guides 27 and pivot bearings, which form a cross slide, and with two outer support Bearings 28 for a rotation axis 16 of the register plate 15. Two linear motors 25.1, 25.2 run in the X direction5 and a linear motor 25.3 in the Y direction. The support bearings 28 'may also be offset inwardly, thereby resulting in a more compact, lighter construction.

FIGS. 7a, 7b show a register diagram with a chronological sequence of the register functions over a machine cycle of 360 ° as a function of the machine rotation angle W = 0 °-360 ° with the functions or movements 51 through

58 of the components:

51 Movement of drive chain 32 and gripper bar 8: a = pull forward b = stand still 5 52 Movement of sheet 5: a = convey, move to the next station b = fix to the register plate 15 53 at the grab bar 8: a = open clamp al = open point b = close clamp b2 = closing point 4 register plate 15: a = lower b = lift

55 Register plate 15: a = vent, evacuate b = ventilate

56 Front stops 12: a = set up, set up b = lower, lowered

57 Longitudinal register in the X direction with actuators Ll, L2: a = move to the setpoint positions P 1 S, P2S b = reset to the initial position

58 transverse register in Y-direction with actuator L3: a = move to the desired position P3S b = reset to the starting position 57a, 58a = move the register plate 15 with the sheet fixed thereon 57a2, 58a2 the displacements in the X direction and in Y-direction are partly simultaneous

The timing of register alignment of Fig. 7a may be as follows, for example.

The sheet 5 entering the registration plate 15 is mechanically stopped by the front stops 12 mounted on the registration plate. The bow reaches the front stop at eg W = 185 ° of the machine position. The index plate is at this time about 8 - 10 mm before the theoretical end position (sheet transfer to the gripper bar). Immediately after the sheet arrival time, the register plate is vented and the sheet is sucked onto the register plate with negative pressure. This creates a frictional connection between the sheet and register plate. Subsequently, at the time W = 225 °, the actuators Ll, L2 begin their movement in the sheet travel direction X. On the Sheets are two print marks Pl, P2 and a side mark P3 attached. The front marker reader, or the sensors S 1, S 2, which are located at a distance of about 10 mm above the sheet, detect the passing print marks P 1, P 2. In the register control 11, the longitudinal mark signals are evaluated and with the two actuators Ll, L2, the sheet is aligned in the longitudinal direction X. The actuators have here for the entire displacement in X and then also in the Y direction 60 ° each of the machine movement available. At a machine speed of, for example, 7500 arc / hour, this results in 80 ms each for X and Y positioning. Once the sheet is detected and fixed at the front stop by the vacuum of the register plate 15, the front stop 12 can be swung. The starting point for this is W = 240 °. The front stop must be in an upright position at the front stop at W = 185 ° before the bow arrives, eg at W = 170 ° - 180 °. At the machine position W = 285 °, the actuator L3 starts its movement. By means of a page mark reader or sensor S3 and by the controller, the sheet is aligned laterally in the Y direction. At time W = 345 °, the clamps close the gripper bar and thus fix the bow. Subsequently, the register plate 15 is ventilated and the sheet must be free at time W = 360 ° for further transport by means of gripper bar 8. In the example of Fig. 7a, the movements in the X direction (57a) of 225 ° - 285 ° and in Y- Direction (58a) from 285 ° - 345 ° one after the other.

Fig. 7b shows an example in which the displacements X4, X5 by the actuators Ll, L2 in the X direction and the displacement Y6 by the actuator L3 in the Y direction partially simultaneously run, overlapping. Here, the X shift (57a2) occurs e.g. from W = 220 ° - 320 ° (over 100 °) and the Y-shift (58a2) e.g. from 270 ° - 350 ° (over 80 °), wherein the shifts of W = 270 ° - 320 ° run simultaneously.

As a result, more time is available for each displacement direction X, Y, or higher machine speeds can be achieved. The Y shift should not begin until the position of the print marks P1, P2 in the X direction is detected. For this to happen quickly, the sensors S1, S2 are arranged as close as possible to the printing marks P1, P2, for example at a distance of 1 to 3 mm, preferably 1 to 2 mm. Preferably, the Y-print mark P3 should not be read by the sensor S3 until the X-shifts are practically completed.

The displacements in the X and Y directions could also occur simultaneously, e.g. in that the sensors S 1, S 2, S 3 capture the image marks P 1, P 2, P 3 after the sheet has stopped on the register plate at the same time, by taking the position of an image mark with reference to a fixed image as image pickup

Reference point on the register plate 15 is detected, from which the residual displacements Xl, X2, Y3 are calculated and then the actuators Ll, L2, L3 move the sheet simultaneously in the X and Y direction in the desired positions PlS, P2S, P3S.

To further increase the machine speed, the movement 51a of the drive chain 32 may also be more than 180 °, e.g. 190 ° - 200 °, so that the standstill 51b would be less: 170 ° - 160 ° and the other functions 52-58 would be adjusted accordingly.

FIGS. 8 and 9 show a further advantageous embodiment of a register plate with screwed-on suction plates according to FIG. 10.

The side view of the register plate 15 of FIG. 8 shows a swiveling inlet plate 35 as a baffle for an incoming sheet 5, which is brought close and flat to the register plate by the inlet plate, so that the sheet does not bulge and that it can be sucked in quickly. This can be done with

Sliding blocks 37, which rest on both sides on the register plate and are pressed by springs 38 against the register plate 15, a small distance a between register plate 15 and inlet plate 35 can be adjusted. This distance a of eg 1 - 2 mm is adjusted so that the bow as possible without frictional resistance can shrink and yet rests completely flat on the register plate. The inlet plate 35 has at the bow entrance to a bulge 34 and a fixed axis of rotation 36, which is fixed to the chassis. As a result, the inlet plate can be pivoted together with the index plate (15 ', 35') and the incoming sheet 5 can initially be brought close to a still pivoted-index plate zoom.

Fig. 9 shows the register plate of Fig. 8 seen from above with suction pads 41 in the foremost region 17 along the front edge 29 of the register plate. For optimum adhesion and register alignment of the sheets 5, preferably 17 vents 20 are arranged at least in this foremost area. Preferably, this foremost region 17 also has a higher suction power (here by a larger number of venting openings 20) than the region behind (18 in FIG. 3) of the register plate, which has only a few 5 venting openings 20 in a central suction region B7.

FIG. 10 shows one of the suction plates 41 of FIG. 9, which can be produced in a rational manner, can simply be screwed onto the register plate at the front edge 29 and can also be exchanged. The suction pads 41 have inclined slots 42 at a small angle to the transverse axis Y of e.g. 30 °, so that incoming sheets do not hit it. For optimum fixing of the sheets on the register plate, these front suction pads 41 on the surface 19 (FIG. 5b) have a rubber coating. In the rear suction B7 no rubber coating is provided here. 5

Briefly summarized, the sheets are 5 easily, quickly and flat shrink to the front stops and then, especially in the front region 17 by evacuating quickly and safely fixed flat on the index plate, so that the Register alignment can be performed quickly and accurately - without slipping or bulging the sheet. 5

11 schematically shows a register controller 11, which is connected to the position sensors S1, S2, S3, the actuators L1, L2, L3, the actuating means 30, 31 of the register plate 15 and the suction device 22 with the valves 23 and with a drive 14 the front stops 12 and with a machine control 7 of an associated embossing machine. The register control also includes a control program with a computer. An operating and display unit 9 allows, for. also the entry of additional correction values X 1.1, X2.1, Y3.1. With the register control, the sequence of the various functions 51-58 is carried out as described for FIG. 7.

With the erfmdungsgemässen register feeder 10 and the register control 11, an incoming sheet 5 can also be slowed down or slowed down by a conveyor of an investor 3 shortly before his arrival at the front stops 12 to reduce the delay of the arc when abutment.

12 shows an embossing printing machine 1 with a register feed device 10 according to the invention with an evacuatable register plate 15, a register controller 11 and an operating and display device 9 as well as with a flat press 2 and a delivery arm 4. Sheets 5 are underlaid by a feeder 3 onto the register plate 15 fed. The width of the register plate 15 in the X direction is smaller than the scale distance.

The following terms are used in this description: 1 embossing machine

2 flat press

3 investors

4 outriggers

5 sheets

7 machine control

8 gripper bars

9 Control and display panel

10 register feed device

11 register control

12 front stops

13 bracket of 12

14 pneumatic cylinders

15 register plate, feed table, platen

16 rotation axis of 15

17 foremost area at 29, squeegee

18 rear suction plate

19 surface of 15

20 vents

21 vacuum supply lines

22 suction device, vacuum device

23 valves

24 rubber coating

25 linear motors

26 carrier plate

27 linear guides

28 bearings of 16

29 leading edge of 15

30 machine drive 31 cam

32 drive chain

34 bulge

35 inlet plate, baffle 36 fixed axis of rotation of 35

37 sliding block

38 spring

41 suction pads

42 slanted slots 51 - 58 functions of 10

P 1, P2, P3 print marks

P1S, P2S, P3S target positions

Sl, S2, S3 position sensors

L1. L2. L3 actuators X running direction

Y transverse direction

XO, YO basic shift of 15

Xl, X2, Y3 calculated residual shifts, register correction values

Xl.1, X2.1, Y3.1 additional correction values X4, X5, Y6 total displacement of 15

W Machine rotation angle d Distance Position from S 1, S2 to P 1, P2 a Distance from 35 to 15

B 1, B2, B3 suction areas

Claims

1. Registering device for sheet embossing machines with

Front stops and position sensors (S1, S2, S3) for detecting print marks (P1, P2, P3) of a sheet (5) defining the leading edge and 5 the side margin of a printed image, and a controller connected to the position sensors characterized by a register plate (15) as a feed table, which can be pivoted, with ventilation openings (20) and vacuum feed lines (21) to a suction device (22) o and front stops (12), which are lowered, and by two actuators (Ll, L2 ) for positioning the register plate in the X direction and an actuator (L3) for positioning in the Y direction and by a register control (11), with which the register plate (15) is pivoted for the passage of a 5 gripper bar (8), then the gripper bar stopped and the index plate is swung open again, then the sheet (5) is fed and stopped at the front stops (12), o then the register plate is evacuated for sucking and fixing of

Arch on the register plate (15), then the front stops are lowered and the index plate advanced by the actuators (Ll, L2) in the X direction and the sheet is pushed onto the gripper bar (8) and thereby the position of the 5 print marks (Pl, P2) is detected with the position sensors (S 1, S2) and from a residual shift (Xl, X2) calculated and the index plate is moved with the sheet in the X direction in the desired position (PlS, P2S) and after the position of the print marks (Pl, P2) recorded in the X direction is the Register plate is moved by the actuator (L3) in the Y direction in the desired position (P3S), then the sheet is detected by the stationary gripper bar (8), then the register plate (15) vented and the sheet is transported by the gripper bar.

2. Register feed device according to claim 1, characterized in that the displacement in the X direction and the displacement in the Y direction are partly simultaneous (57a2, 58a2).

3. Register feeder according to claim 1, characterized in that the register plate (15) about an axis of rotation (16) is swung down and by a machine drive (30) is moved.

4. Register feed device according to claim 1, characterized in that the front stops (12) on a holder (13) are mounted, which by means of a pneumatic cylinder (14) up and is swung.

5. Register feed device according to claim 1, characterized in that highly dynamic, precise actuators (Ll, L2, L3) are provided, e.g.

Linear motors (25) or servomotors with spindles.

6. Register feed device according to claim 1, characterized in that the actuators three linear motors (25.1, 25.2, 25.3) and a carrier plate (26) with linear guides (27) and with two support bearings (28) for a

Have axis of rotation (16) of the register plate.

7. Register feed device according to claim I _5, characterized in that the register plate (15) has a pivotable inlet plate (35).

8. register retraction device according to claim 7, characterized in that the inlet plate (35) has a fixed axis of rotation (36) on the chassis and spring-loaded sliding blocks (37), whereby a smaller adjustable distance (a) between register plate and inlet plate is defined.

9. register retraction device according to claim 1, characterized in that the register plate at least in a front region (17) at its front edge (29) Entlüftungsöffmmmmgen (20).

10. Register feed device according to claim 1, characterized in that the register plate (15) suction regions (Bl, B2, B3) with different, adjustable suction or with separate vacuum supply lines (21).

11. Register feed device according to claim 1, characterized in that a higher suction power is provided in a foremost region (17) of the register plate.

12. Register feeder according to claim 1, characterized in that at the front edge (29) of the register plate suction plates (41) are mounted with inclined slots (42) as vents.

13. Register feed device according to claim 1, characterized in that the vent openings (20) are widened against the surface (19) of the register plate.

14. Register feed device according to claim 1, characterized in that the surface (19) of the register plate in the region of ventilation openings (20) has an increased static friction.

15. Register feed device according to claim 14, characterized in that the surface (19) has a rubber coating (24) at least in the foremost region (17).

16 register register device according to claim 1, characterized in that additional image pressure correction values (Xl.1, X2.1, Y3.1) can be entered into the register control (11).

17 register retraction device according to claim 1, characterized in that5 of the sheet (5) by a conveying device of an investor (3) shortly before the

Arrival at the front stops (12) is slowed down or slowed down.

18. Register feed device according to claim 1, characterized in that the register control (11) with the position sensors (Sl, S2, S3), the o actuators (Ll, L2, L3), the register plate (15), the suction device (22) and a drive of the front stops (12) is connected and contains a control program.

19. Register feed device according to claim 1, characterized in that the front position sensors 5 (S 1, S2) at a small distance (d) of

1 - 3 mm in front of the front print marks (P1 ₅ P2) with the sheet at a standstill.

20. register feeder Device according to claim 1, characterized in that the register positioning on the front and the side sheet edge instead of print marks (Pl, P2, P3) is aligned.

21. embossing machine with a register feed device (10) according to one of the preceding claims and with an operating and display panel (9).