CH712159A2 - Method and device for transporting variable-thickness printed products. - Google Patents

Abstract

The invention relates to a method for operating a device for the transport and further processing of variable-thickness printed products, which device is operated with at least one adjusting device (15). To set the thickness of each printed products to be processed in the transport direction means (16) are provided, being operated for the individual adjustment of the thickness of the printed product, the adjusting device (15) via at least one lower and an operatively connected upper conveyor belt (13). At the beginning of transport and during further transport, the conveyor belts (13) exert at least one continuous or intermediate contact pressure, which is controlled as a function of the thickness of the printed product, on the printed product. The conveyor belts (13) each have at least one toothed belt wheel, which is operated individually.

Description

Description Technical Field The invention relates to an apparatus and method for the transport of variable thickness printed products. Thus, the present invention is concerned with the supply of printed products produced in a saddle stitcher, perfect binder or thread stitching machine and transferring them to a downstream cutting apparatus. The device is also suitable for printed products that are not or only partially stapled. The products are typically trimmed with two or more separate cuts on three sides. During the cutting process, the products stand still. The product transport takes the products directly behind the front knife, which is arranged transversely to the product direction, transports the products to the position for the first and second cut and then passes the products to the subsequent machine.

Background Art As an introduction to the prior art, for a better understanding of the invention, the following statements are to be considered, which, however, can not be considered in all parts as previously known.

The thickness of the products to be processed in product transport is typically set by the distance between the upper and lower conveyor belts along the entire length of the product transport.

Another possibility is to adjust only the vertical distance of the first timing belt of the upper conveyor belt to the lower conveyor belt, at the point directly behind the first knife, where the product is taken over by the product transport. After the first toothed belt wheel, the conveyor belts in this solution are pressed onto one another by means of spring-loaded elements, which compress elements during transport of a product by the value of the product thickness and thus adapt to the product to be processed.

So far, the adjustment of the vertical distance in both solutions, typically by hand or with an automated axis, driven by a servomotor, instead. This setting is made once when setting up a production and remains constant during the entire production process, unless readjustment is necessary.

In both solution variants, it is found that only one product thickness can be adjusted per production, and thus products with different thicknesses within a production can not be processed or only with a loss of quality.

In the meantime, an internal solution is offered below as the state of the art, which, however, can not yet be considered published in all details. Reference is made to FIGS. 4-6 while maintaining the positioning.

The closest prior art is the transport of the trimmer for saddle stitcher ST500 from Heidelberg Postpress Germany GmbH in Leipzig. The construction is shown in the spare parts catalog FJ.9 974 200.01.

Analogous to the adjustment, which is to be detected according to the invention, the thickness of the product is adjusted via the position of the wheel 50 in the transport device of the ST500. The position of the wheel 50 also changes the position of the conveyor belt 51, which grips and transports the product. The wheel is rotatably mounted on the lever 52. The bolt 53 is fixedly connected to the lever 52. About the hub 54, the position of the lever 52 is driven. The lever 72 is firmly clamped to the hub 54. With the screw 55, the position of the lever 52 to the lever 72 can be adjusted. This is used to set an offset between the position of the lever 52 on the left side and the lever 52 on the right side of the conveyor.

The hub 54 sits on both sides of the transport device on the shaft 56, which leads transversely through the transport device. The polygonal profile of the shaft 56 and the hubs 54 results in that the rotational movement of the shaft 56 is transmitted to the hubs 54.

The shaft 56 is rotatably supported in the side shields 57 of the ST500. At the end of the shaft 56, the lever 58 is attached. About the servo motor 59 and the gear 60, the plunger 61 is moved. This presses against the lever 58 and thus simultaneously adjusts the position of the wheels 50 on both sides of the transport device. Analogous to the adjusting device, which is to be patented, the wheels 50 must be lifted from the product even in this transport device, just before the product back reaches the mechanical stops 62.

The lift-off movement is coupled to the cycle of the machine and is controlled via a cam 63 on the main shaft 64 of the machine. The lever 65 transmits the curved path of the cam 63 to the linkage 66. The linkage 66 moves the lever 67, which is rotatably mounted on the shaft 56. In the lever 67, a threaded rod 68 is seated with two countered nuts 69. The nuts are pressed with the compression spring 70 against the bearing pin 71, which is rotatably mounted in the lever 58. The curved path of the cam 63 is thus transferred purely mechanically to the lever 67 and thus lifts the lever 58 from the plunger 61 from. About the position of the threaded rod 68 in the lever 67 can be adjusted, how large the amplitude of the movement when lifting.

The following disadvantages, respectively. Restrictions can be seen in this prior art according to FIGS. 4-6: The thickness of the products is fixed when setting up the production on the machine. The basic position is set via a slowly rotating servomotor. It is not possible to adjust thickness individually for individual products. Thus, it is not possible to process a thickness-variable production with greatly varying product thicknesses on the machine. Since the left and right sides of the adjuster are mechanically coupled together, it is not possible to detect partial differences in product thickness, e.g. due to glued-in samples of individual products. - The movement profile for the lifting of the conveyor belts just before the product reaches the mechanical stops, is determined by the curved path in the cam, whose speed is fixedly coupled to the cycle of the machine. Thus, the timing and the profile of the movement when taking off can not be customized to individual products. - The shaft, which couples the left and right side of the adjustment, must be removed for the replacement of the conveyor belts and thus leads to longer service times.

Definitions [0014]

Sheet Double-sided printed paper.

Arch parts Several sheets (mostly printed differently).

Brochure printed matter consisting of at least one or more parts of a sheet (newspaper, booklet,

Magazine, catalog).

Staple Consists of a stapling wire and has the shape of a square U.

Stapling Head Cuts and positions the stapling wire and forms the stapling wire into a staple.

Stapling process A process in which at least one staple is pushed through the booklet and closed at the other end.

Stapling carriage: Part of the stapling station on which the stapling heads are mounted. Wherein the stitching slide as ste existing device, used in saddle stitchers with clocked collector chain, or as an oscillating device, which is in stapling in synchronization with the chain can be executed.

Stapling staples a booklet which consists of one or more sheets, by means of a staple staple,

Product / printed product Consists of at least one brochure.

Variable in thickness Recording of products with different thicknesses.

Cutting machine cutting system, which has a front knife and two side blades and the

Cutting process consisting of front section and head / foot section as a subsequent cut executes.

Product feeder Mechanical device for transporting a product, from the delivery of the stitching station to the cutting device.

Saddle stitcher In a saddle stitcher, usually several sheets are collected on a conveyor chain, stapled in the stitching station and cut on three sides in the cutting apparatus.

DESCRIPTION OF THE INVENTION [0015] The invention seeks to remedy this situation. The invention, as characterized in the claims, is based on the object that the product transport to the cutting apparatus products with different product thicknesses can be processed within a production with consistently high quality cut. In order to accommodate products with different thicknesses, the product thickness in product transport must be adjusted from bar to bar to the thickness of the next product.

For this purpose, the adjusting device will adjust the position of the two upper conveyor belts in the area directly behind the knife for the leading edge trim for each product individually. The adjustment device should set a working position for each permissible product thickness (minimum product thickness = 0 mm, maximum product thickness = 10 mm). The setting device is to carry out the positioning up to a maximum production capacity of 9000 products and more per hour for each individual product. The setting device should work flawlessly for all product formats (back length x width) from the minimum product format (118 mm x 60 mm) to the maximum product format (368 mm x 305 mm).

Thus, the first timing belt pulley of the upper conveyor belt is mounted on a pivoting lever and is adjusted from cycle to cycle to the thickness of the next product. The positioning of the lever takes place via a roller, which is attached to the lever and rolls on a cam.

The cam is mounted directly on the rotor of a servo motor, which receives the desired position for each individual clock from a control unit. The caster is applied to the open cam with a preloaded tension spring, allowing the lever to lift away from the cam when overloaded to clear a paper jam. This protects the mechanics against overload. The levers on the left and right sides each have their own drive and can be individually adjusted to a set position.

As regards the method of operating the transport means shown in the figures in operative connection with the cutting means, the following is to say: 1. The position of a first toothed belt wheel is set to the print product thickness of the next cycle based on the set value of the control unit. 2. The printed product is detected and retracted between at least one upper and one lower conveyor belt, wherein preferably such a pair per head and foot side is arranged parallel to the conveying direction of the printed product. 3. Before the first cutting operation in the cutting apparatus, the printed product is aligned along the plane predetermined by the mechanical stops. For this raises the first timing belt just before the printed product reaches the stops of the printed product in so far slightly, so that it is clamped with a reduced contact force between the upper and lower conveyor belts and can be aligned with the attacks. 4. The contact pressure on the printed product by the upper conveyor belt thus decreases towards the end of the transport, but a remanence contact force is maintained, which only selectively acts in the area of Druckproduktrückens. 5. This contact pressure in the area of printing product back is selectively maintained by the front plane of the upper conveyor belt while maintaining the local contact force along the Druckproduktrückwirkens still acts while the remaining pressure product-active length of the upper conveyor belt against the conveying direction of the printed product out to a few Grade angled lifts, such that forms a wedge-shaped gap between the surface of the printed product and the lower surface of the upper conveyor belt, the zero point of which adjusts along or in the region of the printed product back. 6. Optionally, the upper conveyor belt exerts its contact force for the first time at a distance from the printing product back, if a bulging of the printed product is detected in the region of the printed product back. 7. When reaching the cutting location, the conveyor belts stop. 8. The printed product is pressed with a pressing element on the lower blade and cut. 9. The first timing belt pulley is then lowered onto the printed product. 10. The pressing element is lifted from the lower blade and releases the printed product. 11. The conveyor belt system then speeds up the printed product and transports it to another position for another cut. 12. As soon as the printed product is no longer below the first belt pulley of the upper conveyor belt, the first pulley wheel is adjusted to the print product thickness of the next cycle.

The main advantages of the device according to the invention can be determined as follows: Such a print product transport makes it possible to run productions with a consistently high quality of cut, in which the product thickness varies from cycle to cycle. In addition, print product transport offers the prerequisites for fine adjustment of the target position of the first toothed belt wheel manually during production or automatically depending on the print product thickness. There are also those conditions in which the timing and duration of the thickness adjustment can be made depending on the thickness or the size of the printed product. By lifting the roller from the cam in the event of a paper jam, the mechanism is protected against overload.

BRIEF DESCRIPTION OF THE FIGURES Exemplary embodiments of the method and the device according to the invention are described in more detail with reference to the following figures. All elements not essential to the instant understanding of the invention have been omitted. In general, the same elements in the various figures are given the same reference numerals. However, identical or similar elements may be provided with different reference numerals in the different figures if necessary. This is related to the fact that the positions are strictly related to the figures or can be understood, especially if they have slight structural changes to each other. If necessary, this lack of concordance is pointed out. It shows:

Fig. 1 a cutting device;

2 shows a transport device;

FIG. 3 shows an adjusting device, the illustration being a view from below; FIG.

Fig. 4-6 a transport device according to the prior art;

7 shows a system consisting essentially of investors, a stitching station and a cutting apparatus;

Fig. 8 is a detailed view of the position of the transported product in the cutting apparatus;

9 shows a mechanical structure of the product transport, corresponds to FIG. 3;

FIG. 10 shows the mechanical structure of the product transport according to FIG. 9 from above; FIG.

Fig. 11, 12, the kinematics in connection with the lifting movement;

Fig. 13 shows the transfer of a product with a thickness of 5 mm;

Fig. 14 shows the transfer of a product with a thickness of 10 mm;

Fig. 15 the transport of the transferred product.

EMBODIMENTS OF THE INVENTION, INDUSTRIAL APPLICABILITY FIG. 1 shows a representative example of a cutting device for three-sided trimming of printed products. The Messerhubeinrichtung 2, which has a separate drive 3, is operated in a lifting movement and determines the machine cycle of the device 1. At the Messerhubeinrichtung 2 can at least the knife 4 (see Fig. 2) for the leading edge, head and Fußbeschnitt the Printed products 5 are attached. The printed products 5 are transported by a transport device 6, which has a separate drive 7 (see FIG. 2), to the cutting position for the leading edge trim, then to the cutting position for simultaneous head trimming and foot trimming and subsequently to the transfer position to the subsequent device. During the cutting process, the printed products 5 are completely stopped. A preceding transport device, not shown, ensures that the distance from product back to product back is always the same, synchronizes the positions of the printed products 5 in the transport direction T to the cycle of the knife lifting device 2 and transfers the printed products 5 to the following transport device 6 the leading edge trimming the products are aligned with the aid of mechanical stops 8 (see Fig. 2) in the transport direction T. FIG. 1 also shows the control unit 9 for the knife lifting device 2 and the control unit 10 (see FIG. 2) for the transporting device 6.

Fig. 2 shows the transport device 6, which transports the products to the cutting positions. The drive of the transport device 7 drives by means of a belt drive 11 two shafts 12 and thus four conveyor belts 13. The products 5 are gripped and transported between the conveyor belts 13. The contact pressure for the gripping of the products is generated by a plurality of pressure elements 14, which are arranged one behind the other in the transport direction T.

Fig. 2 will now be further described with reference to Fig. 3. The representations shown better reflect the spatial configuration of the adjustment device. Another spatial representation of the device is shown in FIG. 10.

By adjusting device 15 shown, the thickness of the printed products 5 is set in the transport device 6. The adjusting device 15 has a separate drive 16 (see FIG. 3) which is fastened on a carrier plate 17. The drive 16 (see FIG. 3) is connected to a separate control unit 26 (see FIG. 3). On the drive, a cam 18 (see FIG. 3) is attached. The wheel 19 (see FIG. 3), which defines the position of the conveyor belt 13 (see FIG. 3), is rotatably mounted on the lever 20 (see FIG. 3). The roller 21 (see Fig. 3) is also mounted on the lever 20 (see Fig. 3). The lever 20 (see Fig. 3) is pulled with a tension spring 22 (see Fig. 3) in the direction of the cam 18 (see Fig. 3). In this case, the roller 21 (see FIG. 3) is pressed against the outer surface of the cam 18 (see FIG. 3). The lever 20 (see Fig. 3) is rotatably mounted on the fixed axis 23 (see Fig. 3).

The axis 23 (see FIG. 3) is connected to the side plate 27 and the support plate 17. The sensor 24 (see FIG. 3) is fixed in the carrier plate 17. It recognizes the disc 25 (see FIG. 3), which is connected to the lever 20 and thus the position of the lever 20 (see FIG. 3) is determined.

In this example, the adjuster 15 consists of two assemblies, which are composed of the identical type and number of parts. An assembly corresponding to the preceding description is attached to the left side plate 27 of the transport device 6. The other module is attached to the right side plate 27 of the transport device 6.

Referring to Figs. 1-3, the operation of the cutter is as follows: [0030] The first print product 5 is aligned with the product spine in the transport direction T by the preceding transport device and synchronized with the cycle of the knife lifting device 2. Before the transfer of the printed product 5 to the transport device 6, the drive 16 rotates the cam 18 in the predetermined by the control unit 26 position. During the movement of the cam 18, the roller 21 rolls on the outer surface of the cam, and the lever 20 is pivoted due to the force of the tension spring 22 to the new position. Together with the lever 20, the wheel 19 executes the pivoting movement and positions the conveyor belt 13 for the transfer of the product 5 from the preceding transport device.

The printed product 5 enters the transport device 6 and is gripped between the conveyor belts 13. The drive 7 brakes targeted and drives the printed product 5 up to the mechanical stops 8 zoom. Shortly before the printed product 5 reaches the mechanical stops 8, the drive 16 performs a pivoting movement and thus lifts the wheel 19 with the conveyor belt 13 from the printed product 5 so that it can align itself in the transport direction to the mechanical stops 8.

The transport device 6 transports slightly longer than is theoretically necessary so that the printed product 5 reaches the mechanical stops 8. The conveyor belts 13 slip easily over the printed product 5 and pull this against the mechanical stops 8. Shortly thereafter, the conveyor belts 13 stop. The product is pressed onto the bottom knife with a press element and cut. After the cut, the drive 16 again performs a pivoting movement and lowers the wheel 19 onto the printed product 5.

Thereafter, the drive 7 accelerates the conveyor belts 13 and the printed product 5 is transported to the position for the simultaneous Kopfbeschnitt and Fussbeschnitt. At the same time, the next printed product 5 is transferred from the preceding transport device to the transport device 6 and transported to the mechanical stops 8.

After each restart of the machine, the drive 16 rotates the cam 18 in the direction in which the conveyor belt 13 is lifted from printed product until the sensor 24 detects the disk 25 on the lever 20. Thus, the drive 16 is referenced to the value stored in the control unit 26.

The use of the adjusting device 15 is also very well possible in devices which differ from the example described. Aspects of deviating devices are described below: In the described example according to FIGS. 1-3, a wheel and thus a conveyor belt are positioned at a height. With the adjuster, other components such as e.g. Support rollers, baffles or sensors are positioned exactly at the desired height or product thickness.

In the example described according to FIGS. 1-3, the left upper conveyor belt and the right upper conveyor belt are positioned in the area behind the leading edge trimming with the adjusting device. The need for two conveyor belts results in the described device from the minimum and the maximum format of the printed products to be processed. The adjustment could also be used in devices which have only one conveyor belt or more than 2 conveyor belts.

The number of components of the adjusting device could accordingly be only 1 or more than 2. In addition, the adjusting device could be adapted in such a way that each two wheels are positioned with a lever. This would result in e.g. for a transport device with 4 upper conveyor belts an adjustment with only 2 modules.

In the described example according to FIGS. 1-3, the upper conveyor belts are positioned vertically. When lifting the conveyor belts lift up from the printed product. The direction of the movement results in the example described from the fact that the position of the lower blades of the cutting stations and the lower conveyor belts of the preceding and following transport devices is fixed. Thus, the underside of the printed product is in each case at a fixed transport height, on which it is transported through the device. The adaptation to thicker or thinner printed products always takes place upward, e.g. by the position of the upper conveyor belts in the preceding and following transport means. Therefore, the adjusting means also moves the conveyor belt vertically upward. The adjustment means could also be used to move a component vertically downwards or laterally e.g. Position transversely to the transport direction.

The advantages of the described embodiments are the following: With regard to drives, the adjusting device 15 each comprises a separate drive 16 for the positioning of the left and the right conveyor belt 13. The drives 16 are thereby independently and independently of the control unit 26 driven by the remaining drives 3 and 7 of the device 1 with an individual signal.

In contrast, in the known solutions in this area of application (drives), the left and right sides of the adjusting device are mechanically coupled together. For this purpose, e.g. used a multi-toothed shaft or a polygon shaft. The time sequence of the movement is made with a cam, which is mechanically bound to the stroke of the knife lifting device. When the machine is at a standstill, the amplitude of the movement can be adjusted and a fixed, mechanical offset can be set from the left to the right side.

With regard to the drives according to the invention, the following advantages result: By virtue of the two separate drives 16, the mechanical coupling of the left and right sides, which would lead transversely through the device 1, is eliminated. This gives better accessibility in the device e.g. to remove jammed printed products 5 from the transport device 6. The lack of coupling allows assembly and service work such. the change of conveyor belts 13 faster and thus cost-effective. - By the individual control of the drives 16 via the control unit 26, the movement profile for the left and right side of the transport device 6 independently of each other and independently of the remaining drives 3 and 7 of the device 1 can be defined. This makes it possible to adapt the amplitude and the time sequence of the movement individually to each individual product. This function is used for products with one-sided greater product thickness, e.g. needed due to a glued in goods pattern. The product pattern does not necessarily have to be present for every product 5. The movement can be adjusted for each individual product, depending on whether a sample is glued in or not. The bulkiness of the printed products 5 can be taken into account. For bulky products, the amplitude when lifting the conveyor belt 13 on the mechanical stops 8 can be increased depending on the thickness of the printed products 5, so that they can better align. - In the event of disturbances such as jammed printed products 5 in the transport device 6, the conveyor belts 13 can be lifted independently of the current state of the device, so that the disorder can be easily solved. - In a thin printed product 5 with a very thick back conveyor belts 13 can be discontinued late on the printed product 5 when the back of the printed product 5 has already passed the wheel 19, so that the printed product 5 is not present with the back on the wheel 19 and braked becomes.

Concerning the cam 18 this is carried out in the operating range such that the contour of the outer surface corresponds to a wound linear slope. The increase or decrease in the distance from the axis to the outer surface of the cam plate 18 is always constant per angle set back.

In contrast, in the known solutions in this application (cam) the adjustment movement is controlled by a mechanical cam, which is coupled to the clock of the device. The adjustment movement is fixed due to the curved path in the disc and depends on the speed of the device.

With regard to the cam disc according to the invention, the following advantages result: The wound-up, linear gradient of the outer surface of the cam plate 18 serves for the translation of only one rotational movement. The position, speed and acceleration can be controlled for the entire adjustment movement purely via the control unit 26 and is not dependent on the direction of rotation or the speed of the device 1.

Figs. 4-6 show an apparatus in which the thickness of the printed product is adjusted via the position of the wheel 50. The position of the wheel 50 also changes the position of the conveyor belt 51, which grips and transports the printed product. The wheel is rotatably mounted on the lever 52. The bolt 53 is fixedly connected to the lever 52. About the hub 54, the position of the lever 52 is driven. The lever 72 is firmly clamped to the hub 54. With the screw 55, the position of the lever 52 to the lever 72 can be adjusted. This is used to set an offset between the position of the lever 52 on the left side and the lever 52 on the right side of the conveyor.

The hub 54 sits on both sides of the transport device on the shaft 56, which leads transversely through the transport device. The polygonal profile of the shaft 56 and the hubs 54 results in that the rotational movement of the shaft 56 is transmitted to the hubs 54.

The shaft 56 is rotatably supported in the side shields 57. At the end of the shaft 56, the lever 58 is attached. About the servo motor 59 and the gear 60, the plunger 61 is moved. This presses against the lever 58 and thus simultaneously adjusts the position of the wheels 50 on both sides of the transport device. Analogous to the adjusting device according to the invention, the wheels 50 must also be lifted off the printed product in this transport device, shortly before the product back reaches the mechanical stops 62.

The lift-off movement is coupled to the cycle of the machine and is controlled by a cam 63 on the main shaft 63 of the machine. The lever 65 transmits the cam track of the cam 64 on the

Claims (13)

Linkage 66. The linkage 66 moves the lever 67, which is rotatably mounted on the shaft 56. In the lever 67, a threaded rod 68 is seated with two countered nuts 69. The nuts are pressed with the compression spring 70 against the bearing pin 71, which is rotatably mounted in the lever 58. The curved path of the cam 63 is thus transferred purely mechanically to the lever 67 and thus lifts the lever 58 from the plunger 61 from. About the position of the threaded rod 68 in the lever 67 can be adjusted, how large the amplitude of the movement when lifting. Fig. 7 shows a saddle stitcher consisting of investors 107, a stitching station 103 and a downstream cutting apparatus 102, in which the elements and units for the inventive product transport 101 according to the preceding Figs. 1-3 are housed. The saddle stitcher essentially represents the starting point for the development according to the invention. In the production method with digitally printed sheets, each product is unique, which comprises a certain number of sheets, which directly has a direct influence on the product thickness and therefore requires that the staples for each product must be different lengths, the stapling quality should be maximized. At speeds of 9000 or more cycles per hour, it produces runs extremely efficiently and flexibly. Thanks to the space-saving design of the system and a high level of automation, this saddle stitcher is a high-performance production system for the smallest to medium runs. The saddle stitcher shown has at least one Einrichtassistenten, which guides the operator gradually through the applicator, ie from the investors to a downstream cutting apparatus (three-knife trimmer). As a result, the saddle stitcher shown is extremely simple. At this saddle stitcher elements are incorporated, which continuously determine the product thicknesses, so that the stapling process can then be carried out with wire lengths, which are designed according to the product thicknesses. Of course, the saddle stitcher shown has electronic product tracking, which extends from the gathering chain to a downstream cutting apparatus (three-knife trimmer). According to the invention, this saddle stitcher is equipped with a stitching unit which is able to staple products with varying product thicknesses and consistent staple quality from bar to bar, the settings for the thickness variance occurring dynamically during operation between two stitches. The variable wire length is achieved via an external wire feed gearbox using a wire drawer gear, this is driven by a self-propelled, and is free from the rest of the mechanics. A certain rotational movement of the motor corresponds to a certain wire length. Generally, the length of the wire section will depend on how thick the product thickness is, determined by product thickness measurement prior to stapling and during operation. For this purpose, a variable staple symmetry is based on a stapling head housing belonging knife box basis, the staple symmetry via a directly driven on the stapling head closed cam (spiral) can be set securely, which determines the position of the horizontally guided knife box and thus the position of the point of intersection. The drive is mounted on the stapling head and thus makes the oscillating movement of the stitching carriage. The respective horizontal position of the knife box depends on the respective length of the wire section, and thus it depends on the product thicknesses to be stitched, which is determined by a product thickness measurement before stapling and during operation. Fig. 8 is an overall view of the product transport in the cutting apparatus in accordance with Figs. 1 and 2. Shown here is the area of the front section with at least one front blade 106, which is in operative connection with corresponding mechanical stops 105. Downstream is then the area head / Fußschnitt with side knives 104 can be seen. Fig. 9 corresponds to the already explained Fig. 3, upper view, wherein auxiliary elements are still included herein. From this point of view, the view according to FIG. 10 is a position rotated by 90 ° relative to FIG. 9. FIGS. 11 and 12 show the stroke movement 116 injected by the cam 18 via the roller 21, which represents a measure for the different thicknesses of the printed products. Well visible in this context, the tension of the spring 22 (see Fig. 3). The final purpose of this lifting movement is shown in Figs. 13-15, which show the processing of various product thicknesses. Thus, in Fig. 13 for a printed product having a thickness of 5 mm, or in Fig. 14 for such a thickness of 10 mm. Furthermore, in Fig. 13 and 14, the integral course of the upper conveyor belt 117 (see also Fig. 3) and the lower conveyor belt 120 can be seen, and shown, and how these bands are in operative connection with each other, for the purpose of detection and onward transport of the In addition, the degree of freedom 118 relating to the thickness adaptation of the printed product to be processed proceeds from FIG. 14. Finally, FIG. 15 shows the further transport 121 of the printed product 5. Claims 1. A method for operating a device for the transport and further processing of variable-thickness printed products, which device is operated with at least one adjusting device, wherein means for adjusting the thickness of the respective printed products to be processed in the transport direction are provided, wherein for the individual adjustment of the thickness of the Print product, the adjustment is operated via at least one lower and an operatively connected upper conveyor belt, which at the beginning of transport and during further transport at least one controlled depending on the thickness of the printed product continuous or intermediate contact pressure on the printed product, and that the conveyor belts each have at least one toothed belt which is operated individually. 2. The method according to claim 1, characterized in that the adjusting device is operated with two paired conveyor belts, which are arranged laterally to the printed product, and the print product transverse to the conveying direction head and touch capture. 3. The method according to claim 1 and / or 2, characterized in that the method comprises the following steps: a) the position of a first toothed belt wheel is set on the basis of the desired value of the control unit to the printed product thickness of the next cycle; b) the printed product is detected and drawn in between at least one upper and one lower conveyor belt, wherein such a pair is preferably arranged per head and foot side parallel to the conveying direction of the printed product; c) Prior to the first cutting operation in the cutting apparatus, the printed product is aligned along the plane predetermined by the mechanical stops, wherein the first pulley just before the printed product reaches the stops of the printed product so far lifted slightly so that this clamped with a reduced contact force between the upper and lower conveyor belts can and can align itself with the attacks; d) The contact pressure on the printed product through the upper conveyor decreases towards the end of the transport, with a remanence contact force is maintained, which acts over a large area or only selectively in the area of the printed product back; e) When reaching the cutting location, the conveyor belts stop. 4. The method according to claim 3, characterized in that the printed product is pressed with a pressing element on the lower blade and cut. 5. The method according to claim 3, characterized in that the first toothed belt wheel is then lowered to the printed product. 6. The method according to claim 3, characterized in that the pressing element lifted from the lower blade and the printed product is released. 7. The method according to claim 3, characterized in that the system consisting of conveyor belts then the printed product is accelerated and is brought into the position for the second cut. 8. The method according to claim 3, characterized in that when the printed product is outside the preceding belt pulley of the upper conveyor belt, this pulley is set to the printed product thickness of the next cycle. 9. The method according to one or more of the preceding claims, characterized in that the contact pressure is selectively maintained in the area of the printed product back by the front plane of the upper conveyor belt is maintained while maintaining the local contact pressure along the Druckproduktrückens while the remaining pressure product-active length of the upper conveyor belt against the conveying direction of the printed product is angularly offset by a few degrees, such that forms a wedge-shaped gap between the surface of the printed product and lower surface of the upper conveyor belt, whose zero point coincides along or in the region of the printed product back. 10. The method according to one or more of the preceding claims, characterized in that at bulges of the printed product in the region whose Druckprodukterücken the upper conveyor belt exerts its contact force for the first time at a distance to the Druckprodukterücken. 11. The method according to one or more of the preceding claims, characterized in that the adjusting device comprises a control unit which controls the drive of the adjusting device independently of the lifting movement of the knife lifting device. 12. An apparatus for carrying out a method for the transport and the Weitverarbeitung of variable-thickness printed products, characterized in that the device comprises a transport device, which accomplishes the transport of the printed products to the cutting positions, that the transport device is equipped with at least one drive with at least one belt drive in that the belt drive consists of conveyor belts which ensure that it is seized and transported by a contact force on the printed product. 13. The apparatus according to claim 12, characterized in that the transport device has at least one adjusting device, that the adjusting device has at least one separate drive which is mounted on a support plate, that the drive is in operative connection with at least one cam, that the cam on a rotating element is in operative connection with the carrier plate, which in turn is operatively connected via another rotating element with the conveyor belt, that the conveyor belt by the preceding kinematic causal chain and supported by a resilient element in turn is in operative connection with the printed product.