DE19746456A1 - Digital printing system - Google Patents

Abstract

A feeder (12) feeds in the length of material (14). A printer unit (17) and a cutter (22) separate the length of material into single sheets which can be stacked in a delivery device (23). A mounting (38) is fitted to receive a tool (26) to be positioned in front of the cutter.

Description

The invention relates to a digital printing system with a device for processing device of a material web, according to the preamble of claim 1.

In the printing industry it is known that after printing on a material web with means of a device for processing a material web at least one Perforation can be introduced into the material web. There are separate ones for this Perforation stations are provided which, for example, offset printing machines are connected downstream.

Certain print jobs are unsuitable for offset presses. For example these are smaller editions and also orders where more fold a print image change is required. For this, smaller printing machines or, more recently, digital printing systems with a processing device a material web used. These digital printing systems with one device for processing a material web have the advantage that small runs, for example, 5,000 to 10,000 printed copies can be produced economically  can. In addition, these digital printing systems feature one device for processing a material web the advantage that a printed copy in Ana Logie of the intended page sequence can be printed, so that this Druckex directly after the printing process for a format cutting process and the booklet is ready. This manufacture is supported by the computer Printer control enables, which both on the front and on the back can print different motifs on the side of a material web course the following print page again completely from the previous print page can deviate.

Such digital printing systems with a device for processing a mate rialbahn, however, have the disadvantage that with certain requirements, such as for example in the formation of checkbooks in which single pages are simple can be separated from the checkbook due to a perforation in the manufacturer are expensive. This is due to the fact that the finished printed individual copies separately, for example, a perforation device must be supplied in order to perforate the single sheets. At the same time, however, there is a re-sorting where after the top sheet is at the bottom, which in turn is undone must become.

The invention is therefore based on the object of having a digital printing system to develop a device for processing a material web such that the Processing of a material web, for example the introduction of a perforation, a groove, a cut or the like, in the manufacturing process of a Print copies is integrated.

This object is solved by the features of claim 1. By inventing arrangement according to the invention of at least one device for processing a Material web on a digital printing system with a device for processing a material web, which positions a tool in front of a cutting tool, it is possible that a perforation, a groove, a cut or the like on the Material web can be introduced without additional or downstream Steps are required. The material web can be paper, cardboard or fo  lienbahn of different thicknesses and surfaces. The tool the device for processing a material web is immediately before Cutting tool, viewed with respect to the material path, arranged. There can perform a perfo on the material web in a simple and cost-effective manner ration, a groove, a cut or the like can be introduced without one subsequent handling of the single sheets, i.e. the feeding of a perforation, Grooving or cutting device for processing a material web, required would. Furthermore, by positioning the device for processing a material web, or the tool immediately before Cutting tool for separating the sheets be able to ensure that the perforation, the groove, the cut or the like without damage at the end of the printing ganges is present. The tool advantageously grips a last deflection roller immediately in front of the cutting tool, so that no major tensions by the deflection and deflection of the web on the perforation, which Groove, the cut or the like can act, creating an at least partial Breaking of the perforation, the groove or the like could be given.

According to an advantageous embodiment of the invention it is provided that the front direction for processing a material web at least two clamp connections has, by at least one cross strut on which the holder of the tool ges is attached, are spaced from each other, the clamp connection a frame can be attached to a material web guide. By this Ausge staltung can easily the digital printing system with a device for Processing a material web can be retrofitted. Furthermore, it can also a simple exchange or disassembly via the clamp connection be given. The clamp connections are advantageously made of this type formed that this to existing component components of the digital printing system can attack with a device for processing a material web, as in for example on a frame of a sheet guide, which the isolated sheets feeds a boom. This can be a simple assembly, because this area is very accessible.  

According to a further advantageous embodiment of the invention it is provided that the tool rolls on a shaft deflecting the material web. This can the digital printing system with a Vorrich without any further design effort processing a material web on already existing components Production of a perforation, a groove, a cut or the like be gripped. This is a cost-effective design of the device for Processing of a material web enables. At the same time, an integra tion of the device in the digital printing system with a device for processing tion of a material web is possible because the device has a low volume men needed.

According to a further advantageous embodiment of the invention it is provided that the cross strut of the device for processing a material web across the web course of the paper is arranged and the holder so the tool takes that the axis of rotation of the tool is arranged parallel to the deflection shaft is. For example, a continuous or discontinuous perfo ration, groove or a cut along the course of the path, which for example when subsequently cutting in A4 format as a transverse perforation tion or transverse groove can be formed. This configuration can also Longitudinal perforation or groove, even after cutting the material web be inserted into an A3 or A4 sheet. Only the pressure is used for this format chosen accordingly to this perforation or the groove as longitudinal or Training cross processing.

According to a further advantageous embodiment of the invention it is provided that the shaft deflecting the material web, on which the tool rolls, as steel shaft, is preferably designed as a hardened steel shaft. The in the digital Printing system with a device for processing a material web existing Deflection shaft is mostly made of aluminum and is or hardened steel shaft, exchanged for precise machining to enable the course of the path. The tool is advantageously made of tetem material made so that with the same material pairing a high life  duration of both components is given. This applies accordingly to the use of egg nes cutting wheel or a creasing wheel with the corresponding deflection shaft len.

Alternatively to the inventive positioning of the device for the bear Processing a material web directly in front of the cutting tool, in the conveying direction seen the web of material, it should be provided that the device in a suitable neten area between the feeder and the cutting tool is arranged. This applies in particular to the perforation and creasing device. For example the device for processing a material web could be provided in the feeder be so that immediately after pulling the web of material from the roll a Perforation, a groove or possibly a cut is applied. Likewise the perforation, the groove or the cut before or after a Printing unit, or before or after a cooling unit or developer be arranged. It can advantageously also be provided that the Device accommodates several identical or different tools. This can attack both simultaneously and in successive work steps to the digital printing system. There can also be several pre directions with different tools in a row in front of the cutting tool be arranged so that, for example, in a first cut on any Place a perforation, in a second step an indentation or groove is embossed and in a third step the material web with a Cutting wheel is cut accordingly.

In the embodiment of a device for processing a Material web for a digital printing system is provided that at least two Clamp connections are provided depending on a cross strut a material web width are spaced apart and that the tool Receiving bracket is provided which can be fastened to the cross strut. These components create a simple and inexpensive, which on a digital printing system with a device for processing a mate rialbahn can be retrofitted. Furthermore, due to this simple design  Design allows a lightweight design that includes all functions for setting and positioning of the tool on a deflection shaft.

According to a further advantageous embodiment of the invention it is provided that the cross strut is designed as a profile element. This can make it possible for with a tongue and groove connection, the tool holder is easy and can be quickly positioned to the deflection shaft.

According to a further advantageous embodiment of the invention it is provided that the holder of the tool has a fastening section which on the Cross strut can be attached and at least one holder carrying the tool has section. This division of the bracket into two enables egg ne fine adjustment of the tool to the deflection shaft is given. For this is before an actuator is advantageously provided. This enables the zero point to be switched on be put, that is, that the tool without a small gap on the order steering shaft runs so that the perforation or cut can be ensured. The thickness of the embossing can also be adjustable for a groove.

It is advantageously provided that the actuator has an eccentric bolt, which is arranged in a bore of the fastening section and with one the collar attacking the eccentric bolt is adjustable. By a simple Dre hung of the collar, the receiving portion along a longitudinal axis of the Fastening section to be movable, the movements in plus and Minus direction depends on the amount of the eccentric bolt. The rough setting he follows the fixation of the clamp connections of the device on the digital Printing system with a device for processing a material web.

According to a further advantageous embodiment of the invention it is provided that the travel of the adjusting wheel through the length of a guide slot on which a engages the fastening section of fixed bolts, can be limited. The This guide slot can advantageously have a length over an angle of 180 ° exhibit. This collar is fixed to the eccentric bolt in such a way that in the rotating range maximum and minimum deflection of the recording from approximately 180 ° section to the fastening section is made possible. At the same time can be more advantageous  as a scale on the collar, so that after a Change of a blunt tool, such as a cutting wheel, creasing rades or the like simply and quickly the appropriate position again can be put.

According to a further advantageous embodiment of the invention it is provided that at least one between the fastening section and the receiving section spring-elastic element is provided. As a result, the receiving section and the fastening section is braced against one another so that defined position conditions exist. The resilient element enables a deflection of the tool in the direction of the cross strut in the event of out-of-roundness Wave or thickening of the paper or the like is made possible. The travel is advantageously due to the ratio of the bore of the receptacle section determined in which an eccentric section of the eccentric zens is arranged, the diameter of which is smaller than the bore of the receptacle cut is formed.

According to a further advantageous embodiment of the invention it is provided that through the formation of the cross strut as a profile element any position along the cross strut over the width of the path is made possible, so that according to the respective application, the tool accordingly can be arranged. A scaling is advantageously provided on the profiling seen which corresponds to the web width, so that a simple and quick on direction of the device when changing the print job can.

Below is a preferred embodiment in the description and the Drawing described. Show it:

Fig. 1 is a schematic side view of a digital printing system with a device for processing a material web.

Fig. 2 is a schematic side view of the device as a perforation device in the installed state and

Fig. 3 is a schematic plan view of the device, according to FIG. 2, in the installed state.

In Fig. 1, a digital printing system 11 is shown with a device for processing egg ner web 24 in a schematic side view. In this digital printing system 11 with a device 24 for processing a material web 14 , it is a device which is controlled via a computer with reference to the printing sequence of individual motifs, so that both on the front and on the back of a material web differ Motifs can be printed on and the immediately following prints in the motif can be different. This digital printing system is a personalization system that integrates certain customer addresses or the like into the printing process. This printing system can print in color or black and white. Laser printers can be used. The printing system is preferably designed as a xerography system and works by means of an LED exposure. With this digital printing system it is possible that the motifs can be applied directly from the computer to the paper, cardboard, film or the like.

On the digital printing system 11 with a device 24 for processing a material web 14 , a feeder 12 is provided which receives a paper roll 13 . From this paper roll 13, a web of material or paper web 14 is withdrawn and the digital printing system 11 is supplied with a device 24 for processing a material web fourteenth For example, a corona station 16 can be provided for the cleaning treatment of the material web 14 . In front of a printing unit 17 , a drive shaft 18 is provided which pulls the web of material 14 from the paper roll 13 and feeds the printing unit 17 . At the same time, balancing waves can also be provided, which ensure a corresponding paper tension. The printing unit 17 is followed by a developer unit 19 and a cooling unit 21 before the material web 14 , which is advantageously printed on the front and back, is fed to a cutting tool 22 . This paper cutter 22 shows 22 the material web 14, for example, in A3 or A4 single sheets. Depending on the web width, which can be used for a digital printing system with a device for processing a material web, other formats can of course also be separated. After separation, who the single sheets fed to the boom 23 and stacked.

The device 24 according to the invention for processing a material web 14 is described by way of example in the embodiment as a perforation device. The same applies to the design of the device 24 as a creasing device, cutting device or the like. The device 24 is arranged to the digital printing system 11 with a device for processing a material web 11 that a tool 26 , seen in the web transport direction, engages in front of the cutting tool 22 on a deflection shaft 27 . The inventive device for processing a material web 24 can also be arranged in an area immediately after the removal of the material 14 of the paper roll 13 up to a cutting tool 22 . This positioning can also be adapted as a function of the device for processing a material web, it being fundamentally advantageous if the perforation, the groove or the cut is introduced as late as possible or after the pressure has been applied. Furthermore, there should be good accessibility to enable easy assembly and disassembly of the device 24 for processing a material web 14 . This is particularly advantageous for the exchange of blunt perforation wheels 26 .

In Fig. 2 is a schematic side view and in Fig. 3 is a plan view of the inventive device 24 for processing a material web 14 Darge presents. This device 24 for processing a material web 14 consists of several components. The device 24 for processing a material web 14 is releasably attached to a frame 32 by means of a clamp connection 31 . The Rah men 32 guides the single sheets from the cutting tool 22 to the boom 23rd The clamping connection 31 is formed in two parts by means of a clamping piece 33 , which can be tensioned via a screw connection to a holder 34 . A cross strut 37 is fastened to the holder 34 via a tongue and groove connection 36 . This cross strut 37 is designed as a covered double profile element, which is designed for example as a drawn profile element. The length of the cross strut corresponds at least to the width of a material web 14 so that it can be spanned. A clamping connection 31 is provided at the respective end of the cross strut 37 so that the device 24 for processing a material web 14 can be fastened to the frame 32 . Alternatively, the cross strut 37 can also be formed by two separate, square-shaped profile elements.

On the top of the cross strut 37 is a bracket 38 for receiving and posi tionation of the tool 26 via a further tongue and groove connection 39 on. The bracket 38 has a fastening portion 41 which can be fastened via the tongue and groove connection 39 to the cross strut 37 and a receiving portion 42 which carries the tool 26 . For this purpose, a quickly releasable storage can be provided so that a time-saving exchange of blunt perforation onsheels can take place. The receiving section 42 is slidably arranged along the Befestigungsab section 41 or, in other words, the receiving section 42 is adjustably received with respect to the distance of the tool 26 to the deflection shaft 27 . The receiving portion 42 and the mounting portion 41 each have holes 43 in which bolts 44 are arranged. This enables the guiding and compensating movement of the receiving section 42 to the fastening section 41 . Between the receiving section 42 and fastening section 41 are resilient elements 46 , preferably compression springs, which are arranged around the bolt 44 , vorgese hen, so that a play-free positioning of the tool 26 to the deflection shaft 27 is made possible. Furthermore, this configuration provides a resilient path, which enables the tool 26 to lift off the deflection shaft 27 , for example if there are out-of-roundness or a paper jam or the like.

The setting of the receiving section 42 or the position of the tool 24 relative to the deflection roller 27 is carried out via an actuator 47 . This consists of an adjusting ring 48 which is arranged in a defined position to an eccentric 49 . The axis of rotation of the eccentric bolt 49 is defined by a bore 51 in the fastening section 41 . An eccentric section 52 of the Ex zenterbolzens 49 is associated with a bore 53 of the receiving portion 42 . The diameter of the bore 53 is larger than that of the eccentric section 52 . Due to the resilient elements 46 , the receiving portion 42 is braced ge compared to the mounting portion 41 , so that the cross strut 37 facing wall region of the bore 53 is located on the eccentric portion 52 . The distance between the tool 26 and the deflection shaft 27 can be adjusted by turning the adjusting ring 48 . A slot 54 in the collar 48 is advantageously formed with an angle of 180 °, so that a maximum and mini times positioning is adjustable, since the eccentric bolt passes through a maximum and a minimum at a rotation of 180 °. The rotational movement of the adjusting ring 48 is limited by a bolt 56 guided in the slot 54 . Due to the larger bore 53 of the receiving section 52 with the eccentric section 52 of the eccentric bolt 49 , the spring travel is determined.

It can be seen in particular from FIG. 3 that a plurality of brackets 38 can also be attached to a cross strut 37 . These are along the cross-member can be arranged to each other in an arbitrary distance 37th On one end of the cross strut 37 , a scaling can be provided to enable easy positioning of the stanchions 38 . A scaling can also be seen on the adjusting ring 48 so that a quick adjustment is possible again after an exchange of a tool 26 .

Alternatively, an electrically controlled actuator can be provided instead of the manually adjustable actuator 47 . For example, this can be provided by a lifting magnet or by mechanical, electrical, pneumatic or hydraulic actuating elements, in which it is possible that a perforation is applied or not depending on a specific control of a printed image. Thus, for example, in the case of a printed copy which consists of several pages, individual pages can be selected in which a perforation is to be introduced. This control can also follow the computer, which is responsible for the selection and arrangement of the print motifs. Furthermore, it may be possible that the bracket 38 is adjustable by electric motors, pneumatic or hydraulic drives along the cross strut 37 , so that perforations can be made, for example, at different positions, seen across the width of the Bahnver.

Alternatively, it can also be provided that a pressure or distance sensor is installed in the holder 38 , which enables a message to be issued when the tool 26 approaches the deflection shaft 27 manually or automatically as soon as the required pressure or distance between the cutting edge of the tool 26 and the peripheral wall of the deflection shaft 27 is set. Furthermore, a device 24 for processing a material web 14, for example, can be provided between the cross strut 37 and the holder (s) 38 , with which it is possible for the holders 38 to be lifted off the deflection shaft 27 at the same time, provided that a print job has been carried out which does not require perforation. As a result, complete disassembly or subsequent assembly of the device 24 for processing a material web 14 can be dispensed with. The clamp connection 31 can also be designed such that it can attack at other positions of the digital printing system 11 , but it is fundamentally necessary that the attachment of the device 24 for processing a material web 14 is designed such that a force application of the tool 26th is given to the axis of rotation of the deflection shaft 27 , which is substantially perpendicular to it.

When the device 24 according to the invention is used as a cutting device, a cutting wheel is used as the tool and a deflection shaft is used which has one or more counter cutters. Otherwise, the explanations regarding the perforation device apply.

The inventive design of the device for processing a web of material 11 is provided that can be by simple dissolving at Klemmver connection 31 provided for fixing screws quick mounting and de montage of the apparatus for processing a web of material 11 added.

When using the device according to the invention as a creasing device, a creasing wheel and a deflection roller with one or more grooves or grooves are used as the tool. In this way, for example, a predetermined kink can be embossed into a thicker paper, cardboard, film or the like. Longitudinal or transverse grooves can also be embossed depending on the format as an aesthetic feature. The width and the type of depression can be determined by the selection of the creasing wheel and / or the corresponding deflection shaft 27 .

Claims (27)

1. Digital printing system with a device for processing a material web with a feeder ( 12 ) for feeding the material web ( 14 ), a printing unit ( 17 ) and a cutting tool ( 22 ) for separating the material web ( 14 ) into single sheets are stackable in a cantilever ( 23 ), characterized in that at least one device for processing a mate rialbahn ( 24 ) is provided, which has a holder ( 38 ) for receiving a tool ( 26 ) and the tool ( 26 ) in front of the cutting tool ( 22 ) positioned. 2. Digital printing system according to claim 1, characterized in that the device ( 24 ) has at least two clamp connections ( 31 ) by at least one cross strut ( 37 ) on which the tool ( 26 ) receiving holder ( 38 ) is attached, are spaced from one another, the clamping connections ( 31 ) being attachable to a frame ( 32 ) of a material web guide. 3. Digital printing system according to claim 2, characterized in that the clamping connections ( 31 ) of the device ( 24 ) after the cutting tool ( 22 ) on the frame ( 32 ) of the material web guide are arranged. 4. Digital printing system according to one of the preceding claims, characterized in that the cross strut ( 37 ) of the device ( 24 ) transverse to the web of the material web ( 14 ) is arranged and the holder ( 38 ) takes on such that at least one along the Material web ( 14 ) running processing can be introduced. 5. Digital printing system according to one of the preceding claims, characterized in that the tool ( 26 ) is assigned to a material web ( 14 ) deflecting shaft ( 27 ) which is arranged in front of the cutting tool ( 22 ). 6. Digital printing system according to one of the preceding claims, characterized in that the tool ( 26 ) is designed as a perforation wheel and at least partially introduces a perforation along the material web ( 14 ). 7. Digital printing system according to one of the preceding claims, characterized in that the material web ( 14 ) deflecting shaft ( 27 ) is designed as a steel shaft, preferably as a hardened steel shaft. 8. Digital printing system according to one of claims 1 to 5, characterized in that the tool ( 26 ) is designed as a grooved wheel, and along the material web ( 14 ) at least partially a predetermined kink can be introduced. 9. Digital printing system according to claim 8, characterized in that the material web ( 14 ) rotating shaft ( 27 ) at the point of application of the tool ( 26 ) has a circumferential groove. 10. Digital printing system according to one of claims 1 to 5, characterized in that the tool ( 26 ) is designed as a cutting wheel and at least partially a cut along the material web ( 14 ) can be introduced. 11. Digital printing system according to claim 10, characterized in that the material web ( 14 ) deflecting shaft ( 27 ) at the point of application of the tool ges ( 26 ) has a shear bar. 12. A device for processing a material web for a digital printing system with at least one tool ( 26 ), characterized in that at least two clamping connections ( 31 ) are provided which are spaced apart by a cross strut ( 37 ) depending on the width of a material web ( 14 ) are det and that a tool ( 26 ) receiving bracket ( 38 ) is seen easily, which can be fastened to the cross strut ( 37 ). 13. The apparatus according to claim 12, characterized in that the cross strut ( 37 ) is ausgebil det as at least one profile element, preferably aluminum profile. 14. The apparatus according to claim 12 or 13, characterized in that the holder ( 38 ) on the cross strut ( 37 ) engaging fastening portion ( 41 ) and at least one tool ( 26 ) carrying the receiving portion ( 42 ). 15. Device according to one of claims 12 to 14, characterized in that the position of the tool ( 26 ) with an actuator ( 47 ) is adjustable, which positio nates the receiving portion ( 42 ) to the fastening portion ( 41 ). 16. The apparatus according to claim 15, characterized in that the actuator ( 47 ) has an eccentric bolt ( 49 ) which is arranged in a bore ( 51 ) of the fastening supply section ( 41 ) and with an eccentric section ( 52 ) in the receiving section ( 42 ) engages and positioned this to the fastening section ( 41 ), the eccentric bolt ( 42 ) having an adjusting ring ( 48 ) arranged thereon being adjustable. 17. The device according to one of claims 12 to 16, characterized in that the travel of the adjusting ring ( 48 ) by the length of a guide slot ( 54 ) in which a fixed on the fastening portion ( 41 ) engages bolt ( 56 ) can be limited . 18. The apparatus according to claim 16, characterized in that the eccentric portion ( 52 ) of the eccentric bolt ( 49 ) in a bore ( 53 ) of the receiving portion ( 42 ) is arranged which is larger than the diameter of the eccentric portion ( 52 ) is. 19. Device according to one of claims 12 to 18, characterized in that between the fastening section ( 41 ) and the receiving section ( 42 ) of the holder ( 38 ) at least one resilient element ( 46 ) is hen, which opposite the receiving section ( 42 ) the Befestigungsab section ( 51 ) arranged braced. 20. The apparatus according to claim 18 or 19, characterized in that a Fe derweg the tool ( 26 ) in dependence on the difference between the Boh tion ( 53 ) of the receiving portion ( 42 ) and the diameter of the eccentric's portion ( 52 ) of the eccentric bolt ( 49 ) is. 21. Device according to one of claims 12 to 20, characterized in that the fastening section ( 41 ) with a tongue and groove connection ( 39 ) or clamp connection can be attached at any point along the cross strut ( 37 ). 22. Device according to one of claims 12 to 21, characterized in that at least one holder ( 38 ) with a tool ( 26 ) on at least egg ner cross strut ( 37 ) can be attached. 23. Device according to one of claims 12 to 22, characterized in that the tool ( 26 ) is arranged interchangeably on the holder ( 38 ). 24. Device according to one of claims 12 to 23, characterized in that the tool ( 26 ) is designed as a perforation wheel. 25. Device according to one of claims 12 to 23, characterized in that the tool ( 26 ) is designed as a grooved wheel. 26. Device according to one of claims 12 to 23, characterized in that the tool ( 26 ) is designed as a cutting wheel. 27. Use of the device for processing a material web according to one of claims 12 to 26 in a digital printing system ( 11 ) for introducing at least one perforation or a groove or a depression in a material web ( 14 ).