DE102008025667A1 - Conveyor for sheet layers and method for forming and conveying a scale flow from sheet layers - Google Patents

Abstract

The invention relates to a conveying device for sheetfed systems (3) having a first conveying device (10), which has a blocking unit (30, 31) for blocking the sheets to substantially slip-free bottom layers (3), a second conveying device (40), which is the first conveying device (10) downstream in the transport direction of the sheet layers (3) and a deflection unit (43) for deflecting the trailing end of a sheet layer (3), a third conveyor (50), which the second conveyor (40) in the transport direction of the sheet layers (3 ), which feeds a scale flow of sheet layers to a storage area in such a way that adherence of the sheet layers to each other is reliably prevented. This is achieved in that between the second conveying device (40) and the third conveying device (50) a falling step (H2) is formed for the sheet layers. The inventive method for forming and conveying a scale flow from sheet layers (3) is characterized by the following process steps: - blocking the sheet to sheet layers (3), for the most spill-free transport of the sheet layers (3), - transporting the blocked sheet layers (3) in an overlapping area (2), in which in the transport direction successive sheet layers (3) are brought to overlap, - deflection of the overlap to be brought, leading sheet layer (3) at the rear end in the conveying direction of the leading ...

Description

The The invention relates to a conveyor for Sheet layers with a first conveyor, which a Blocking unit for blocking the bow to largely slip-free Sheet layers, a second conveyor, which the first conveyor in the transport direction of the sheet layers is downstream and a deflection unit for deflecting the trailing End of a sheet layer, a third conveyor, which of the second conveyor in the transport direction the sheet layers is arranged downstream, which is a shingled stream Sheet layers such a feeds a storage area that a Adhesion of the sheet layers with each other is reliably prevented. This is achieved in that between the second conveyor and the third conveyor a drop level for the sheet layers is formed.

The The invention further relates to a method for forming and conveying a scale flow from sheet layers.

at corresponding generic conveyors is a continuous stream of eg. From a sheeter coming bow or sheet layers fed to a collection area, wherein Such conveyors with a relative high speed work. At such high speeds It is difficult to store the sheet layers in a collection area, without to damage these. The speed of the bow or Sheet layers must be significantly reduced when placing, otherwise no damage-free storage of the sheet layers is possible, this is done regularly by forming a shingled stream of sheets or sheets. When Sheet layers, which are also called paper clips or short clips, Here are flat stacks of eg. 2 to 8 sheets in particular Paper and plastic film and composite sheets of z. Eg paper and a slide to understand. Within the wide product range the papers with particular glossy or very smooth Surfaces may cause problems during transport the sheet layers come, where in addition to the adhesive power also unwanted electrostatic charges also the environmental conditions of a Paper processing machine - consisting essentially from a sheeter, a stacker tray and one in between arranged conveyor - jointly responsible could be. A special challenge here on the one hand to ensure adequate adhesion of the bow a bow position with each other and on the other hand a possible low adhesion of the sheet layers with each other. Too strong Liability of the sheet layers with each other can not last to problems in Guide stack storage area.

In the EP 1 266 854 B1 the Applicant is a proven in practice conveyor with three successively arranged conveying devices disclosed, of which the second and third conveying device have a lower conveying speed than the first. This known conveying device comprises in the region of the first conveying device an ionizing device, by means of which the sheet layers are electrostatically chargeable. In the region of the second conveying device, a suction device is arranged, by means of which the sheet layers can be acted upon with suction air in at least one region of the sheet layers. In order to form an overlap for generating a scale flow of sheet layers, a step is provided between the first and the third conveyor, so that the sheet layers can overlap.

In the DE 27 25 547 A1 discloses a cross-cutter downstream device for forming a scale flow of arcuate or stapled flat objects. This known device has high-speed upper bands, which are guided together both via a feed area and via a discharge area. Furthermore, fast-running subbands are provided in the feed area and downstream, low-speed subbands in the discharge area. These slow-running subbands in the discharge area serve as brake bands and cause the formation of the scale flow. The high-speed upper belts are slightly adjustable in height with their lower runs in the discharge area by means of eccentrically mounted rollers in order to adjust the distance to the slow-running sub-bands to the height of the scale flow to be generated accordingly. Furthermore, this known device has an overlapping finger and a downstream suction box, which is adjustable in or against the transport direction. Subordinate to the suction box is also a top side arranged brake roller with an associated, arranged on the underside of the support roller. However, such a machine or such a method and such a device is less suitable for sensitive papers and for very high speeds, as this can damage the sheet or sheet layers.

In the DE 199 45 114 A1 is described a downstream of a cross-cutter device for forming a scale flow. This known device has a discharge device, Beschleunigungsober- and sub-bands and a suction box with a downstream, serving as a brake band sub-band. In adaptation to the height of the scale flow to be formed, the distance of the upper belts to the transport plane is adjustable. Furthermore, the upper and lower bands are in order to format setting in and against the transport line adjustable adjustable.

Compared to this prior art, an object of the present invention to provide a conveyor of the type mentioned, in which the sheet layers cut from multilayer sheets can be conveyed at very high speed and this high conveying speed on a relatively short distance to a suitable for laying down Speed can be reduced and gently to a discard pile, which is limited by a front-mounted, fed. This should be excluded both damage to the sheet or sheet layers and excessive adhesion of the sheet layers with each other. It is also a further object of the present invention, a device of the type mentioned, starting from the in the European patent specification EP 1 266 854 B1 described conveyor to improve such that the process depending on the characteristics of the particular difficult to process paper types and formats can be adjusted easily and in a very short time accordingly.

These Problem is in accordance with the present invention solved by a conveyor for Sheet layers with a first conveyor, which a Blocking unit for blocking the bow to largely slip-free Sheet layers, a second conveyor, which the first conveyor in the transport direction of the sheet layers is downstream and a deflection unit for deflecting the trailing End of a sheet layer, a third conveyor, which the second conveyor in the transport direction of the Subordinate sheet layers, which a shingled stream of sheet layers a storage area supplied such that an adhesion of the Sheet layers reliably prevented each other or at least considerably is reduced. This is by the constructive measure achieved that between the second conveyor and the third conveyor a drop level for the sheet layers is formed.

At this place is for the sake of completeness one pointed out that the above term blocking unit is not limited to an ionization unit, so is u. a. also an adhesion-based unit through support a pressure roller providable. On the other hand, it should be mentioned this is different from the already cited prior art Types of deflection units are known as da u. a. are: rotating and / or clocked overlapping fingers, blowing air nozzles, springy mounted pinch rollers, ionizers and various Suction devices.

A particularly preferred embodiment is given then when the third conveyor device a first actuating means comprising which their parallel arranged conveyor belts deflect such that at least two Transporttru mabschnitte different Height and thus another case level, now forms between these Transporttrumabschnitte.

A further particularly preferred embodiment is then given, if the third conveying device has second adjusting means, around the transporting section adjacent to the second conveying device extend and downstream Shorten transport section or vice versa.

Further Preferably, each first adjusting means comprises at least one deflection roller and a lifting means, wherein each lifting means as a linear actuator, preferably designed as a pneumatic cylinder and for a separate Control is provided.

Prefers the second actuating means should have a linear drive, which comprises a reciprocable carriage. As a suitable Linear drive is a version as a rack / gear drive provided, wherein the rack fixed to a carrier is mounted and the gear rotatably mounted on the carriage is. Alternatively, here u. a. also a commercial one Timing belt linear unit providable.

Preferably is the first or are the first adjusting means horizontally and movably mounted on the second actuating means.

After all should preferably the first, the second and the third conveyor in each case a plurality of transversely to the conveying direction parallel comprise spaced conveyor belts, these Conveyor belts in the simplest case, a common group form, which is associated with a common first actuating means. In a further embodiment, the conveyor belts divided into at least two groups and each group is a first actuating means assigned. Preferably, the greatest flexibility with regard to the formation of a configurable conveyor belt group, a so-called band carpet, but achievable if the number of first adjusting means corresponds to the number of conveyor belts.

According to the invention, a paper processing machine is provided with at least one of the aforementioned conveyors. Such a paper processing machine serves, in particular, to unroll, cut and stack paper from one or more rolls simultaneously and ultimately to a further processing machine, for example a packaging machine or a printing press ne supply.

• – Verblocken der Bogen zu Bogenlagen, zum weitestgehend verrutschungsfreien Transport der Bogenlagen,
• – Transportieren der verblockten Bogenlagen in einen Überlappungsbereich, in dem in Transportrichtung aufeinanderfolgende Bogenlagen zur Überlappung gebracht werden,
• – Ablenkung der zur Überlappung zu bringenden, vorlaufenden Bogenlage am in Förderrichtung hinteren Ende der vorlaufenden Bogenlage und Nachfördern der nachfolgenden Bogenlage, zur Bildung der Überlappung.
• – Transportieren der zur Überlappung gebrachten Bogenlagen auf einen ersten Transporttrumabschnitt eines tiefer angeordneten Förderebene einer nachfolgenden Fördervorrichtung, unter Haftungsminderung zwischen den Bogenlagen.

The object is further achieved by a method for forming and conveying a scale flow from sheet layers with the following method steps:

• - Blocking the bow to sheet layers, for the most part without distortion transport of the sheet layers,
• Transporting the blocked sheet layers into an overlapping area in which successive sheet layers are brought to overlap in the transport direction,
• - Deflection to be brought to overlap, leading sheet position at the rear end of the leading sheet position in the conveying direction and Nachfördern the subsequent sheet position, to form the overlap.
• - Transporting the overlapped sheet layers on a first Transporttrumabschnitt a lower arranged conveying plane of a subsequent conveyor, under adhesion between the sheet layers.

A particularly effective adhesion reduction between the sheet layers achieved in that during further transport of the sheet layers of the first Transporttrumabschnitt the Abförderbands on a deeper arranged subsequent second Transporttrumabschnitt the Abförderbands, with further reduction of liability.

advantageously, the attitude of the crossing point or the drop level between the first transport run section and the second Transport Trumabschnitt the discharge conveyor in or opposite the transport direction and / or the height difference between the first Transporttrumabschnitt and the second Transporttrumabschnitt the conveyor belt, in particular depending the format and material of the sheet layers.

At It should be noted that according to the invention in another embodiment of course, the transition point or the case level between the brake band of the second conveyor and the first Transporttrumabschnitt the Abförderbands the third conveyor in position and height can be made adjustable.

Further it is also possible while maintaining the inventive concept and may be useful or advantageous to the first and the second Transport Trumabschnitt the discharge conveyor separate conveyor belts together with drives. The advantage of such an alternative Embodiment is that with simple drive means the Transporttrumabschnitt a first Abförderbands with a different conveying speed than the Transporttrumabschnitt a second Abförderbands would be operable to possibly the overlap length to vary the bow positions.

Of the Advantage of the present and below described embodiment is u. a. in that with simple measures, here adjusting means manages two length and difference height variables To create Transporttrumabschnitte, in which the increase in length of a first section equals the amount Length decrease of a second section is without requiring elaborate Compensation means for separate conveyor belts required are.

The Invention will hereinafter be understood without limitation of the general Invention idea using an embodiment below Referring to the drawings described. Show it:

1 a side view of an essential part of a known generic conveyor in a schematic representation,

2 a detailed view of the overlapping and Abförderbereichs an improved embodiment of a generic conveyor in a first operating state,

3 a detailed view of the overlapping and Abförderbereichs according to an improved embodiment 2 a generic conveyor in a second operating state,

4 an enlarged detail of Abförderbereichs an improved embodiment according to 2 a generic conveyor in a third operating state,

5 a perspective view of adjusting means in Abförderbereich according to 2 ,

In the in the 1 to 5 The device shown is in each case a part of a paper processing machine, not shown here in its entirety, in which a multilayer paper web is fed to a cross cutter, likewise not shown, by conveyor belts and cut by this cross cutter to desired bow lengths. The cut sheets are then passed through the device to a depositing, not shown, and stored there in stacks one above the other.

At this point, for the sake of completeness, it should be pointed out that merely for the sake of a simplified illustration, the belt conveyors are depicted in the figures as a single conveyor belt and also in the following description However, in each case actually have a group of jointly driven and arranged parallel conveyor belts, wherein such a group of conveyor belts is also referred to as a belt carpet. In the illustrated and described below conveyor belts are endless belts, which are driven by individual drives, not shown.

In The following figures are the functionally identical elements with the same Reference numbers provided so that of a new idea each is apart.

1 shows a side view of an essential part of a known generic conveyor, which is described below in abbreviated, a complete description of the patent EP 1 266 854 B1 be removed.

The paper clips 3 be between a top band 25 and a conveyor belt 15 in the conveying direction A in the direction of a Abbremsbands 45 transported. The upper band 25 is by means of pulleys 21 deflected and by means of a drive roller or a drive unit, the in 1 not shown, driven. Accordingly, the conveyor belt 15 over pulleys 11 deflected and over a drive roller 12 driven. The same applies to the Abbremsband 45 and the subband 55 ,

The paper clips consisting of some paper sheets, such as, for example, 2 to 8 sheets, are produced by means of an ionizer 30 that with an electrical connection 31 is provided and the electrostatic field generated thereby 32 electrically charged, so that the paper sheets in each paper clip 3 held together. For focusing the electrostatic field is preferably a counter electrode 34 intended.

The correspondingly loaded paper clips 3 are then in the overlap area 2 transported, where this in the rear area, so its trailing end, ie in 1 in the left area, by means of suction air 44 be pulled down and into the engagement area of the Abbremsbandes 45 to be brought. To suction air 44 to the paper clips 3 to be able to attack, in this embodiment, a suction box 43 intended.

In the overlap area 2 so come several paper clips 3 to the overlap. These are then overlapped between the upper band 25 and the conveyor belt 55 Continue in transport direction to the right (in 1 ), where it is then gently and slowly struck on a front stop, which is not shown, so that corresponding sheet stacks are generated. The speed of the braking band 45 This corresponds approximately to the speed of Abförderbands 55 ,

2 and 3 show a detail of a side view of an improved conveyor according to the invention with a detailed view of the overlapping and Abförderbereichs in a first ( 2 ) or in a second ( 3 ) Operating state. In these figures, in particular, the transition from the first conveying device ( 10 ) to the second conveyor ( 40 ) and further to the third conveyor ( 50 ) or more precisely the transition from the feed belt ( 15 ) on the brake band ( 45 ) and on the discharge conveyor ( 55 ).

4 shows an enlarged detail from the side view 2 , Wherein also the case stages (H2, H3) according to the invention are shown.

The in the 2 and 3 The conveying device shown can first be subdivided into a feed area and a discharge area adjoining the feed area downstream of the feed area, wherein the transport in the present embodiment, in the 2 to 5 not shown sheet layers ( 3 ) in the direction of the arrow A shown in the figures, ie according to the 2 to 4 from left to right, takes place. The illustrated removal area can again be divided into three sections ( I . II . III ), namely in a deceleration and overlap area I into a first transport section adjacent the overlap area II and a further downstream transport second section III of the conveyor belt ( 55 ) of the third conveyor ( 50 ).

The device has a feed conveyor 15 at the end adjacent to the deceleration and overlap area I from a pulley 11 is diverted. The deceleration and overlap area I has a braking band 45 on, at the beginning of its upper run adjacent to the feed area via a pulley, not shown deflected in the transport direction A and immediately above the suction box to the subsequent guide roller 41 to be led. As the 2 and 3 can be seen, is the upper run of the Abbremsbands 45 by a height H1 lower than the upper run of the feed conveyor 15 , This forms the necessary and necessary for an overlap level in the transport level.

The Abförderbereich has a discharge conveyor 55 which is stationary pulleys 51 is guided. According to the invention, the upper run of the discharge belt is lower by a height H2 than the upper one Run of the Abbremsbands 45 Thus, the leading edges of the clips are slightly fanned when passing this step-shaped transition point, so that the adhesion between the clips with each other is reduced by, for example. Bend and / or air entry.

Furthermore, according to the invention in the upper run of Abförderbands 55 horizontally and / or vertically movable pulleys 56 . 57 . 58 provided, in operative connection with a first actuating means 53 and a second actuating means 60 stand. The latter actuating means 60 causes the horizontal adjustment of the Umlenkrol len 56 . 57 . 58 , whereby the discharge area in two variable Transporttrumabschnitte II and III is divided. This adjusting agent 60 includes a linear actuator, which serves as a rack / gear drive 61 . 62 is formed, a movable carriage 64 , with the rack 61 fixed to a carrier 63 is held and that in the rack 61 meshing gear 62 by means of a motor, not shown, a carriage 64 moved horizontally. The sled 64 finally carries the storage of the movable pulleys 56 . 57 . 58 so that they have the required and format-dependent position according to a minimum section length L1 of z. B. 500 mm or a section length L1 'of z. B. can take 1000 mm.

The adjusting agent 53 effected by means of a lifting means 54 the vertical adjustment of the pulleys 58 , whereby the downstream Transporttrumabschnitt III of Abförderbereichs can be spent to form a step in different heights H3.

In the 2 and 3 is the lifting means 54 together with pulley 58 and support plate 59 shown in a top position, thus in this operating state, the height of the stage H3 = 0. In this uppermost position are the stationary pulleys 51 and the upper movable rollers 56 . 58 at a height, so that the transport area with the sections II , (L2, L2 ') and III horizontally in a plane from the upstream to the downstream pulley 51 extends.

In the 4 is the lifting means 54 together with pulley 58 and support plate 59 shown in a lowermost position, thus the maximum height of the stage is given in this operating state, the height H3 can then be, for example, 25 mm. In this lowest position are the stationary pulleys 51 and the upper movable roller 56 continue at a height, the upper movable roller 58 on the other hand, by an amount H3 = 25 lower, so that the Transporttrum with the sections III slightly rising from the movable roller 58 to the downstream pulley 51 extends. This low pitch has a favorable effect on the transport behavior of the clips in the case of special types of paper, in particular during the transition to a subsequent, horizontally arranged stack of stacks, not shown. Another advantage is that the transfer point of the sheet layers in the storage area maintains a constant height.

In order to take account of the different types of paper and in particular different grammages and / or different surface roughness, it is provided that the number of adjusting means 53 according to the number of conveyor belts 55 of the tapestry carpet. The lifting means are designed separately switchable, so that - adapted to the paper type and / or paper sizes - appropriate groups of engaging conveyor belts 55 let form. Preferably, the stroke H3 is the lifting means 54 adjustable. As a suitable lifting means are preferably pneumatic cylinders, which have an adjustable end position damping provided. There are also suitable as lifting means and alternative electromechanical actuators, such as solenoids, electric cylinders and other linear actuators into consideration, which may also have a continuous stroke adjustment. The formation according to the invention of a height-variable step H3 has the consequence that the downstream transport strand section III of the conveyor belt 55 at a shallow angle between the adjustable pulley 58 and the downstream stationary pulley 51 rises, which in the 2 to 5 not shown. If such an increase is not desired, then a vertical adjustment would be the previously stationary role 51 to provide, the amount to be adjusted height H3 would track.

In 5 is essentially the actuating means 53 shown in perspective in detail. On a sluggish, extending over the entire working width of the conveyor 50 extends, are a variety of lifting means 54 together with pulleys 57 and 58 as well as the support plates 59 arranged side by side transversely to the transport direction. Exemplary is also one of the conveyor belts 55 shown.

For the operation of the method for bringing together and conveying sheet layers or paper clips, the following embodiment is to be named:
First, a paper clip 3 by means of the ionizer 30 charged so that the paper clips or the sheets in the paper clip together. Further transporting the loaded paper clips into an overlap area 2 become the paper clips 3 brought to the overlap, wherein in the rear region of the paper clip just transported in the overlap area 3 Suction air is applied. This happens because in the moment where the rear portion of the clip 3 enters the overlap area, the corresponding suction holes of the Abbremsbänder 45 in the effective range of the suction box 43 to be brought.

On the further transport path, the paper clips 3 from the second (deceleration) conveyor 40 on the third (down) conveyor 50 transferred, this happens the clips 3 a first case according to the invention H2 stage, whereby the clips are loosened slightly among themselves or in other words a reduction in liability by, for example. Bend and / or air entry between the clips 3 is brought before it on the Transporttrumabschnitt II , L2, L2 'of the conveyor belt 55 reach.

The following are the paper clips 3 from the transport section II , L2, L2 'on the downstream subsequent Transporttrumabschnitt III of the conveyor belt 55 transferred, this happens the clips 3 a second case according to the invention H3, whereby in case of need, ie with appropriate control of the lifting means 54 , a further reduction in liability, for example, by bending and / or air entry between the clips 3 is brought before it on the Transporttrumabschnitt III of the conveyor belt 55 reach.

In the further course of conveying the paper clips 3 These are gently pushed together on a stacking platform and / or pallet on a stacker not shown in the figures in the storage area to paper stacks.

1

Conveyor

2

overlap area

3

Sheet position, Paper clip, clip

10

first conveyor

11

idler pulley

12

capstan

15

conveyor belt

20

upper conveyor

21

idler pulley

25

top belt

30

ionizer

31

electrical Connection

32

electrostatic field

40

second conveyor

41

idler pulley

42

capstan

43

suction box

44

suction

45

Abbremsband

50

third conveyor

51

idler pulley

52

capstan

53

first actuating means

54

lifting means

55

discharge belt

56

idler pulley

57

idler pulley

58

idler pulley

59

support plate

60

second actuating means

61

rack

62

gear

63

carrier

64

carriage

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1266854 B1 [0004, 0007, 0032]
• - DE 2725547 A1 [0005]
• - DE 19945114 A1 [0006]

Claims (15)

Conveyor for sheet layers ( 3 ) with a first conveying device ( 10 ), which is a blocking unit ( 30 . 31 ) for blocking the sheet to largely slip-free sheet layers ( 3 ), a second conveying device ( 40 ), which of the first conveyor ( 10 ) in the transport direction of the sheet layers ( 3 ) and a deflection unit ( 43 ) for deflecting the trailing end of a sheet layer ( 3 ), a third conveying device ( 50 ), which of the second conveyor ( 40 ) in the transport direction of the sheet layers ( 3 ), characterized in that between the second conveying device ( 40 ) and the third conveyor ( 50 ) a drop level (H2) is formed. Conveying device according to claim 1, characterized in that the first, the second and the third conveying device ( 10 . 40 . 50 ), each having a plurality of parallel spaced conveyor belts ( 15 . 45 . 55 ). Conveying device according to claim 2, characterized in that the third conveying device ( 50 ) first actuating means ( 53 ), which their conveyor belts ( 55 ) in such a way that at least two Transporttrumabschnitte ( II . III ) of different height and thus a case step (H3) between the Transporttrumabschnitte ( II . III ) trains. Conveying device according to claim 3, characterized in that the third conveying device ( 50 ) second actuating means ( 60 ) to the adjacent to the second conveying device Transporttrumabschnitt ( II , L2, L2 ') and the downstream transport section ( III ) or vice versa. Conveying device according to claim 4, characterized in that first actuating means ( 53 ) movable on the second actuating means ( 60 ) is stored. Conveying device according to claim 4 or 5, characterized in that the second actuating means ( 60 ) with a linear drive ( 61 . 62 ) is formed and a reciprocable carriage ( 64 ). Conveying device according to claim 6, characterized in that the linear drive ( 61 . 62 ) as a rack / gear drive ( 61 . 62 ) is formed, wherein the rack ( 61 ) fixed to a support ( 63 ) is held and the gear ( 62 ) rotatable on the carriage ( 64 ) is attached. Conveying device according to one or more of claims 3 to 7, characterized in that the conveyor belts ( 55 ) are subdivided into at least two groups and each group has a first actuating means ( 53 ) assigned. Conveying device according to one or more of claims 3 to 7, characterized in that the number of first actuating means ( 53 ) the number of conveyor belts ( 55 ) corresponds. Conveying device according to one or more of claims 3 to 9, characterized in that the first actuating means ( 53 ) in each case at least one deflection roller ( 58 ) and a lifting means ( 54 ). Conveying device according to claim 10, characterized in that the each lifting means ( 54 ) is designed as a linear actuator, preferably as a pneumatic cylinder and is provided for a separate control. Paper processing machine with a sheeter and a storage area and at least one conveyor according to one or more of claims 1 to 11. Method for forming and conveying a scale flow from sheet layers ( 3 ) comprising the following steps: - blocking the sheets to sheet layers ( 3 ), for largely slip-free transport of the sheet layers ( 3 ), - transporting the blocked sheet layers ( 3 ) in an overlapping area ( 2 ), in the transport direction successive sheet layers ( 3 ) are brought to overlap, - deflection of the leading to the overlap, leading sheet position ( 3 ) at the rear end of the leading sheet layer in the conveying direction ( 3 ) and Nachfördern the subsequent sheet position ( 3 ), to form the overlap. Transporting the overlapping sheet layers ( 3 ) on a first Transporttrumabschnitt ( II ) of a lower arranged conveying plane of a subsequent conveying device ( 50 ), with reduction of adhesion between the sheet layers ( 3 ). A method according to claim 13, characterized in that a further transport of the sheet layers ( 3 ) from a first transport section ( II ) to a lower arranged subsequent second transport section ( III ) of the conveyor device ( 50 ), with further reduction of the adhesion between the sheet layers ( 3 ) takes place. A method according to claim 14, characterized in that the position of the transition point between the first transport section ( II ) and the second transport section ( III ) of the conveyor device ( 50 ) is set in the transport direction and / or the height difference (H3) between the first transport section (H3) II ) and the second transport section ( III ) of the conveyor device ( 50 ), in particular depending on the format and the material of the sheet layers ( 3 ).