EP2111985A1 - Newspaper printing press with additional printing device and method for variable printing when producing newspapers - Google Patents

Abstract

The printing press has two sets of impression cylinders (11-14) forming two press nips, respectively. One of the press nips is an upstream press nip and the other press nip is a downstream press nip for a web (B), if the web is guided via the press nips. A folder unit (18) is provided, to which or from which the web is conveyed for forming folded newspaper copies. Additional printing apparatuses (6, 7) i.e. inkjet printers, are arranged upstream of the cylinders (11, 13) in fixed association to a reel unwinder (1) or downstream of the cylinders (12, 14) in fixed association to the unit. An independent claim is also included for a method for variable printing of a web in newspaper printing.

Description

The invention relates to a newspaper printing press which can produce newspaper copies with repetitive content in a primary printing process in a running production and is equipped with at least one additional printing device which allows a variable printing within the production, for example individually for each newspaper copy by printing a sequential numbering or the addresses of subscribers. However, the variability can also consist in that groups of newspaper copies are formed within one edition and the copies belonging to the same group are provided with the same imprint by means of the additional printing device, while the imprint is varied from group to group. The print image printed in a primary printing process, preferably in offset printing, can remain the same throughout the entire production or can also be varied with the aid of the so-called flying production change. Furthermore, the invention also relates to a method for printing newspaper copies, especially for long runs, in which the newspaper copies are provided in the primary printing process with the actual newspaper content and by means of at least one additional printing device individually, from newspaper copy to newspaper copy, or in groups with a varying Additional pressure to be provided.

In newspaper production today high volume copies are reproduced. Often the circulation is around ten thousand copies and above. The speed at which the paper web is printed is more than 10 m / s.

With the advancing automation of production equipment, especially since the introduction of single drive technology, the changeover times have dropped from one issue to the next edition, so that even smaller runs can be produced economically, the publishers use these opportunities to the newspaper content to the individual regions vote. In this case, for example, production variants can also be selected in which a paper web is passed through a plurality of printing units, of which prints for printing only one, while the single or more non-printing (s) printing unit (s) is prepared for a subsequent production or be. It is switched to follow-on production by one or more of the non-active printing units is first accelerated to production speed or the pressure of the single or more active pressure unit (s) is turned off and turned on at the hitherto inactive or not active pressure unit (s) becomes. The printing press does not need to be stopped for switching. The process is referred to as "flying output change".

Customization of printed newspapers is sometimes done after the newspaper has been completed. For example, the addresses of subscribers can be printed on the individual copies prior to shipping. Here, the speed of the surface to be printed opposite the address printer is low, so that slower printing methods can be used. In general, only the outside of a newspaper can be printed in this way. For the publisher, it can be interesting to be able to print even inside pages variably, for example individually. It would be conceivable to print entire pages, or even parts of certain pages variable. This would be e.g. Numbering of the copies or the marking of certain copies or the updating of certain contents possible without new printing forms must be installed in the printing press.

The DE102006016065A1 discloses a printing apparatus for a printing press operating on the offset printing principle. In this case, at least one inkjet print head is arranged within the printing press or at least near a printing unit.

A difficulty with the combination of different printing methods is that a substrate which has been printed by a process can have less favorable properties with regard to a further application of paint. In particular, printing on a wet paper web is more problematic than on a dry paper web. Furthermore, the geometric deformation of the substrate by a printing process can lead to difficulties. When wetting a newsprint, paper elongation generally occurs, and web stretch properties due to web tension change. The deformation can result in waviness of the paper web. This In turn, the position-accurate printing of the web makes it difficult. The offset process can lead to the formation of color fog. These lead to contamination of components in the area of the printing press. An inkjet printhead located in the press or near a printing unit must be protected from contamination by appropriate measures. When assigning an inkjet printhead to a printing tower, flexibility is lost: if, for example, a printing tower with an inkjet printhead is used to print on the front side and an inkjet printhead on the back of the web, but two webs are printed in the same printing tower, not everyone can Web page assigned a printhead.

In summary, there are disadvantages of the known method in the limited flexibility with respect to various production variants, the risk of contamination and printing technology difficulties.

It is an object of the invention to enable within a newspaper production a variable pressure with high flexibility with regard to production variants and reduced contamination at the location of the variable pressure.

The invention relates to a newsprint machine comprising a web unwinder, a first impression cylinder, and an impression cylinder for forming a first printing nip for the web, a folder, and an auxiliary printing device for a variable, preferably per newspaper, individual print on the web. The roll unwinder is preferably a roll changer for a fully automatic roll change during production. The impression cylinder may be a non-printing cylinder, for example a steel cylinder. Instead, it may also be a further, also color transferring to the web impression cylinder. The printing machine has a further, second printing cylinder for forming a second printing nip through which the web is conveyed downwards from the first printing nip and in which it can also be printed. The printing cylinders may be in particular blanket cylinders, which are each assigned at least one forme cylinder, preferably an offset forme cylinder. The second printing cylinder is also associated with a counter-pressure cylinder, which in particular can also be a color on the web transferring impression cylinder or a non-printing cylinder, such as steel cylinder. The first and the second impression cylinder can in alternative Ausfühlungen but also with a common impression cylinder each form a pressure nip. The printing gaps are arranged such that the web can be conveyed through at least both printing gaps and can be successively printed on one side, or on both sides or optionally also in one side and in the other on both sides. However, this does not mean that the web in each production variant promoted by both pressure nips and does not mean that they must be printed in both printing columns in promotion by both pressure nips. Thus, in a first production variant, the web can be conveyed through both printing nips and printed in each case, conveyed through both printing nips in a second production variant and printed only in one of the printing nips and conveyed in a third production variant only through the first printing nip, while the second printing nip either not used or another web is conveyed through the second nip. In the printing nips, the web or the plurality of webs are printed in a single or, preferably, different colors in a primary printing process and thereby provided with the image information of the newspaper page (s) to be printed for the respective color. The primary printing process is preferably an offset printing, either a dry offset or preferably a wet offset.

The additional printing device is arranged so that the pressure applied by it during production can be varied, preferably individually for consecutive newspaper pages, for example in the form of a serial numbering or individual addresses of newspaper subscribers. The auxiliary printing device preferably prints without contact on the web or on at least one of partial webs obtained by longitudinal cutting of the web.

According to the invention, the auxiliary printing device is arranged with respect to the conveying direction of the web upwardly from the first printing cylinder in fixed association with the Rollenabwickler or downwards from the second printing cylinder in fixed association with the folder. If the web is printed in more than one printing nip, for example, in a total of two, three or four printing columns for two-sided or at least two, for example in eight printing columns for each one-sided printing, the first printing cylinder is the most upward with respect to the conveying direction of the printing cylinder and the second pressure cylinder downward pressure cylinder. The additional printing device is thus not arranged on the path of the web between printing gaps through which the web is conveyed, but on the railway before or behind the printing gaps of the primary printing process. If it is said that the additional printing device is arranged upwards, ie before the first printing cylinder or downwards, ie after the second printing cylinder, then it should be expressed that an additional printing device only before or behind the printing gaps or an additional printing device before and another additional printing device behind can be arranged the pressure gaps for the web. The word "or" is understood here as in any other place in the usual logical sense, so includes the meaning of "either .... or" and also the meaning of "and", as far as the respective context is not exclusively limited meaning results.

The basic idea is to associate an auxiliary printing device for variable, preferably individual printing of a web not the or the printing unit (s), but the web as such by placing before or after the primary printing process in a reel splitter with associated biasing or a folder with associated turning bars ,

The assignment of the device to the Rollenabwickler or the individual web is fundamentally different from the assignment to the primary printing process. In fact, a printing tower may be associated with one or more paper webs. It is also possible that several printing towers are assigned to the same paper web. A paper web, however, is necessarily associated with exactly one Rollenabwickler. The assignment of additional printing device and web according to the invention is bijective in the mathematical sense, d. h, one-to-one. If the additional printing device assigned to the Rollenabwickler, regardless of the web guide ensures that each web can be variably, for example, individually printed. The assignment of the device either to the reel unwinder or the associated pretensioning unit or to the folding apparatus or the associated turning bar floor overcomes the limitations resulting from an assignment to a particular printing group or a particular group of printing units.

Furthermore, each web is guided independently of the guide through the printing units to the folder. Before the folder, the web can be cut lengthwise. It can be turned or merged into bundles. This is done using suitable guide rollers, for example in a so-called turning bar floor, which is located near the folder. The turning bar floor offers many possibilities for Structuring the newspaper. The integration of the auxiliary printing device in the turning bar floor or in the vicinity of the turning bar floor increases the production flexibility and avoids the difficulties of known methods and devices.

The formation of color fog is greatest in the area of printing towers. If the device is not located in or near a printing tower, the risk of contamination is reduced.

In a preferred embodiment, the additional printing device is installed behind the biasing unit in the case of assignment to the Rollenabwickler. In an arrangement of Zusatzdruckvonichtung in the range of Rollenabwicklers or its biasing unit, the spatial distance to the printing unit (s) is so large that the risk of contamination is reduced. In an arrangement of the device in the area of the folder or the turning bar floor the spatial distance to the printing unit (s) is so large that the risk of contamination is reduced by paint mist. An assignment of the device to the Rollenabwickler and the associated biasing or folding unit and the associated Wendeetage overcomes printing difficulties. In both cases, the web path between the device and the printing tower is greater than when the device is installed in or near the printing tower. As a result, the drying time between the preferably differing printing processes, the primary and the additional printing process, is greater, which is advantageous in terms of printing technology.

Instead of only arranging the additional printing device behind the biasing unit, the additional printing device may also preferably be arranged in the biasing unit. When arranged in the biasing a fixed assignment to one of the deflection of the biasing unit, which are deflection rollers in most applications, preferred. Here, an arrangement directly at a fixedly arranged deflecting body, which is preferably rotatable about a longitudinal axis, particularly preferred. Thus, the additional printing device can be arranged in particular directly at the most downstream in the conveying direction, ie last deflecting the biasing mechanism.

With a spatially large distance between the additional printing device and the printing unit (s) or measures are preferably provided by which the correct position of the variable imprint on the web is ensured. The two printing methods, that of the primary printing process and that of the additional printing device, are synchronized with one another in advantageous embodiments.

Printing errors caused by the insufficiently accurate overprinting of sub-images of different printing units in the same path are referred to as register errors or register errors. A number of methods are known for avoiding register errors. The printed web is scanned with optical sensors. The sensors are, for example, cameras or brightness sensors. The signals of the sensors are evaluated by mathematical methods to make automatic corrections to the settings of the printing cylinder or the web paths. The corresponding methods and devices are referred to as register regulators.

For the purpose of avoiding register errors in the additional pressure, a corresponding register control is used according to a preferred embodiment. In an advantageous embodiment, the same camera is used, which is used for register control of the newspaper printing press, i. the primary pressure is used.

The monitoring of registering may be e.g. take place by a brand field is recorded by means of a camera. Such a tag field is called a register tag. The register mark can be positioned in an image area which can be printed by means of the additional printing device. Then the additional printing device can print a defined part of the register mark. By means of mathematical methods it is possible to determine the position of the individual elements of a register mark relative to one another. Thus, the register of the auxiliary pressure relative to the primary pressure can be determined by the newspaper printing press.

It is advantageous if the camera can be positioned at any point across the web. As a result, the additional printing can take place anywhere and be regulated with regard to the register.

The monitoring of registering may be e.g. also using at least one brightness sensor (as in a cutting position control). In addition to cameras and brightness sensors, other sensors which can be used for register control, e.g. Infrared sensors.

The control requires the installation of at least one sensor at a suitable location of the web path and a possibility of synchronizing the printing process between the printing press and the auxiliary printing device. When installing the additional printing device in the area of the Rollenabwicklers or the associated biasing a sensor can be installed in a printing tower for the web or in the vicinity of the printing tower. An advantageous embodiment is the installation just before the most upward in the path of the web printing gap of a printing tower. If the printing of several webs is provided within a printing tower, the installation of one sensor per web is advantageous, preferably before the respective most up-to-date printing gap per web.

When installing the additional pressure device in the area of the folder or the associated turning floor, a sensor can be installed in the vicinity of the auxiliary pressure device. In a preferred embodiment, the installation takes place in the immediate vicinity of the additional pressure device.

That from the DE102006016065A1 Known method uses encoders to synchronize the printing process of an inkjet printhead with an offset printing press. In the method according to the invention there is no fixed association between the additional pressure device and a printing tower. In order to synchronize the printing process between the device and any printing tower, a corresponding signal can be obtained from a virtual leading axis.

For example, the additional printing device can be so wide that it can be used to print any part of the web. If the device is less wide than the maximum web width, the device may be arranged to be adjustable transversely to the direction of travel of the web. Positioning in the transverse direction can be done manually or automatically.

To guide the web in the region of the device, the use of one or more guide rollers is advantageous. One or more guide rollers may or may be specially designed for Device can be installed, it can also be installed in the device in the area of an existing guide roller. Instead of the additional printing device in the immediate vicinity of a guide roller or other deflecting body, for example, a deflecting roller of the biasing, to arrange and allocate in this sense the respective deflection, the additional printing device can also be arranged on the path of the web between deflecting bodies. The arrangement immediately at a deflection body is given preference, since the web is guided by the deflecting body. This is advantageous in particular for a preferably non-contact additional printing device, since the arrangement of the additional printing device on a free web path there is a risk that the web deflected and thereby the distance is changed to the additional printing device. A fixed assignment to a deflecting body may in particular also mean that the additional printing device is arranged facing the periphery of the deflecting body in question and prints the web in the region of the looping of the relevant deflecting body. Alternatively, the additional printing device may also be arranged directly in front of or behind the loop to print the web immediately before or after entering or leaving the loop.

The additional printing device preferably prints without contact. It can preferably work by the inkjet method. It can consist of an inkjet printhead or an array of multiple inkjet printheads. The print heads can be arranged next to one another or one behind the other or spatially offset in relation to the web running direction. However, the device may also operate by another digital printing method, e.g. the electrophotographic process.

The newspaper printing machine preferably has as many printing units, corresponding printing cylinders and printing gaps, that printed in a newspaper production multiple tracks simultaneously in the primary printing process, passed over one or more turning bar floor (s) and merged into one or more web strands and ultimately processed into newspaper copies , Preferably, at least one additional pressure device is provided for each of the webs and arranged according to the invention. As far as features are disclosed only by the example of a single additional printing device, the statements also apply to any additional printing device of the machine.

Advantageous features are also described in the subclaims and their combinations.

Figur 1

eine erste Produktionsvariante für zwei Bahnen mit den Bahnen zugeordneten Zusatzdruckvorrichtungen jeweils zum variablen Bedrucken der Bahnen,

Figur 2

eine zweite Produktionsvariante zum Bedrucken einer Bahn mit einer der Bahn zugeordneten Zusatzdruckvorrichtung zum variablen Bedrucken,

Figur 3

eine dritte Produktionsvariante zum Bedrucken von Bahnen mit den Bahnen jeweils zugeordneten Zusatzdruckvorrichtungen zum variablen Bedrucken,

Figur 4

eine Anordnung der Zusatzdruckvorrichtung zum variablen Bedrucken im Bereich einer Umlenkeinrichtung,

Figur 5

eine Variante für die Anordnung der Zusatzdruckvorrichtung im Bereich der Umlenkeinrichtung und

Figur 6

Varianten für die Anordnung der Zusatzdruckvorrichtung im Bereich eines Rollenabwicklers.

Hereinafter, embodiments of the invention will be explained with reference to figures. The features disclosed in the exemplary embodiments form each individually and in each combination of features the subject-matter of the claims and also the embodiments described above. Show it:

FIG. 1

a first production variant for two webs with additional printing devices assigned to the webs, in each case for variable printing of the webs,

FIG. 2

a second production variant for printing a web with an additional printing device associated with the web for variable printing,

FIG. 3

a third production variant for printing webs with the webs respectively associated additional printing devices for variable printing,

FIG. 4

an arrangement of the additional printing device for variable printing in the region of a deflection device,

FIG. 5

a variant of the arrangement of the additional pressure device in the region of the deflection and

FIG. 6

Variants for the arrangement of the additional printing device in the range of a Rollenabwicklers.

FIG. 1 shows a first production variant for printing two webs B. The webs B are passed through a printing tower 10, in the embodiment by the same printing tower 10 and printed there in a primary printing process.

The first web B unwinds from a reel unwinder 1 and is conveyed to the printing tower 10 via a pretensioning unit 3, guide rollers 5 and an infeed roller 8 arranged downstream of the reel unwinder 1 in the conveying direction F and successively into two printing gaps of the printing tower 10 printed on both sides. The inlet roller 8 is preferably a tension roller for adjusting the web tension. The first web B is conveyed in the conveying direction F via a deflecting body 9a, preferably an outlet roller 9a, from the printing tower 10, dried on both sides by means of a drying device 15 and then fed via a turntable 16a and a longitudinal folding 17 a folder 18, cut in the folding apparatus 18 transversely and transversely folded to newspaper copies. The outlet roller 9a is preferably a tension roller for adjusting the web tension for the printing process in the printing nips.

The second web B unwound from another Rollenabwickler 2 and is conveyed via an associated biasing unit 4, guide rollers 5 and an inlet roller 8 in the printing tower 10, there also printed sequentially in two printing columns on both sides, conveyed via deflecting body 9b and 9c in the drying device 15 and dried there on both sides. Subsequently, the web B or sub-webs obtained therefrom by longitudinal cutting are guided over the turning days 16b and combined with the first web B or first partial webs obtained therefrom by longitudinal cutting, longitudinally folded and processed in the folding apparatus 18 to the newspaper copies. The inlet roller 8 or at least one of the deflecting bodies 9b and 9c may or may advantageously be formed as a tension roller (s) in order to adjust the web tension of the second web B for the printing process in the printing gaps.

The reel unwinders 1 and 2 are reel changers for each automatic reel change with continuously running web B.

In the printing tower 10, four printing gaps are combined for each two-sided printing. Each of the pressure gaps is formed by a bridge unit. Each of the bridge units has two printing units which are mirror-symmetrical to each other on the left and right of the webs B to be printed. Each of the printing units comprises a color on the respective web B transferring printing cylinder, a respective cylinder associated with the respective printing cylinder and in each case one of the forme cylinder associated with inking and dampening. The first web B is conveyed via the inlet roller 8 in the printing tower 10 and printed in the two upper printing nips, namely between two first printing cylinders 13 and two arranged on the way of the web B down from the first printing cylinders 13 second printing cylinders 14. The first web B is guided from the side into the printing tower 10 via the inlet roller 8 assigned to it in this production variant. The second web B is guided over the in the first production variant associated with her further inlet roller 8 at the lower end in the printing tower 10 and in printing tower 10 by one of two first printing cylinders 11 formed first printing nip and one of two in the conveying direction F of the second web B down arranged therefrom second printing cylinders 12 formed second printing nip promoted and also two-color printed on both sides.

The first web B is led out of the printing tower 10 at the upper end and deflected over the deflecting body 9a assigned to it in the first production variant and fed via the drying device 15 to the associated turning floor 16a. The second web B is laterally led out of this approximately in the middle of the printing tower 10 and deflected via the deflecting body 9b assigned to it in the first production variant and the further downwardly arranged deflecting body 9c and then conveyed via the drying device 15 to the reversing layer 16b assigned to it.

In a fixed assignment to the Rollenabwicklern 1 and 2, an additional printing device 6, 7 is arranged in each case. The auxiliary printing devices 6, 7 are each divided into two, in a pressure part 6 for the pressure on one side and a pressure part 7 for the pressure on the other side of the respective web B. The fixed assignment to the Rollenabwickler 1 or 2 means at the same time also a fixed Assignment to the respective web B. Fixed allocation means in this arrangement that the respective web B can be printed variably, irrespective of the respective production variant and thus irrespective of the path chosen for the production variant, by means of the additional printing device 6, 7 assigned to it, preferably with an imprint, which is unique to each of the newspaper copies, such as a serial number or the address of a newspaper subscriber. The additional printing devices 6, 7 preferably print contactless, they may be formed in particular as an inkjet printer or print, for example, by an electrophotographic process.

In the exemplary embodiment, the additional pressure devices 6, 7 are arranged downwards from the pretensioning unit 3 of the assigned reel unwinder 1 or 2 and upwards from the inlet roller 8 assigned to the respective production variant of the respective web B. Between the two pretensioning mechanisms 3 and the inlet roller 8 arranged on the path of the web B, a guide roller 5 is further arranged downwards from the respective additional pressure device 6, 7, for example, two guide rollers 5 down from the respective auxiliary pressure device 6, 7 and upwards from the inlet roller 8 arranged.

FIG. 2 shows a second production variant for a flying change of the output. In order to be able to change the output on the fly, ie in the case of continuously conveyed web B, the web B is conveyed through more pressure gaps than are required for one of the several different productions. In the exemplary embodiment, the web B is conveyed by a first group of printing columns for the production of a first output and a second group of printing columns for the production of another, second output. In one of the two groups, the printing gaps are closed, so that in these printing gaps on the web B is printed during the current production. The printing gaps of the other group are open in this production, ie the impression cylinders 11-14 of this group are offset from each other during the current production of the first edition. In the production change, the mutually employed printing cylinder 11-14 of a group are turned off from each other, this pressure column thus opened, and the pressure cylinder 11-14 of the other group against each other employed, so closed until then open pressure column of this group. In the exemplary embodiment, each of the two groups comprises four printing columns for a two-sided printing in a total of four different colors. The printing units of the two groups of printing cylinders 11-14 are arranged per group in each case in a printing tower 10 in the form of vertically stacked bridge units. In the second embodiment, a drying device is dispensed with, ie it is printed in the coldset. The printing towers 10 assigned in the second variant of the same web B correspond in each case to the printing tower 10 of the first production variant. The same also applies to the turning floor 16a, the longitudinal folding device 17 and the folder 18. The additional printing device 6, 7 is again assigned to the Rollenabwickler 1 and also arranged as in the first production variant between the biasing unit 3 and 5 guide rollers.

FIG. 3 shows a third production variant on the example of two webs B, which unwind as in the first production variant of each one of the Rollenabwickler 1 and 2. For each of the webs B a separate printing tower 10 is provided with a plurality of printing gaps, for example, again per printing tower 10 four of vertically stacked bridge units formed printing gaps for a two-sided printing in four colors. The printing towers 10 again correspond to the printing towers 10 of the other production variants. The webs B are from the Rollenabwickler 1 or 2 via a respective downstream biasing 3 and one at the lower end of the associated printing tower 10th arranged inlet roller 8 in the respective printing tower 10 and successively conveyed by the pressure column, led out at the top of the printing tower 10 and deflected via an associated outlet roller 9a and promoted by the associated turning days 16a or 16b, then combined, longitudinally folded by means of Längsfalzeinrichtung 17 and cut crosswise in the folder 18 and folded transversely to the newspaper copies.

Unlike the two in the Figures 1 and 2 production variants shown is for each of the webs B its own additional printing device 6, 7 arranged in the conveying direction F down from the printing towers 10 and upwards from the respectively associated turning days 16a or 16b.

The printing towers 10 and the folding apparatus 18 are placed on a machine level M in all production variants. The Rollenabwickler 1 and 2 are on a Rollenabwicklerebene, which is lower than the machine plane M, they are preferably arranged in a roller cellar below the machine level M. In the first and the second production variant, the additional pressure devices 6, 7 are also lower than the machine plane M, preferably arranged in the roller cellar. However, this is not absolutely necessary. Thus, the roll unwinders 1 and 2 and possibly further Rollenabwickler, for which mutatis mutandis the said to the first and the second production variant what also applies, be arranged on the machine level M next to the arrangement of printing towers 10,

In the third production variant, the additional pressure devices 6, 7 are arranged at a height level which lies above the upper end of the printing towers 10. This is also advantageous with regard to the reduction or avoidance of contamination by ink mist of the printing units, as far as additional printing devices 6, 7 are arranged downwards from the respective downstream for the webs B printing gaps, preferably in the immediate vicinity of the turning floors 16a and 16b, preferably as exemplified upwards from the turning floors 16a and 16b.

The arrangement below the machine plane M, for example in a roller cellar, and also the arrangement at the height of the turning floors 16a and 16b is advantageous, but not mandatory. In particular, the arrangement of one or more is advantageous Additional printing device (s) 6, 7 outside a virtual, ie imaginary wrapping, which envelops all the printing units of the printing press. When the printing unit is arranged in printing towers such as the printing towers 10, it is further preferred if the auxiliary printing device or each of a plurality of auxiliary printing devices 6, 7 is or are arranged outside the printing tower or a virtual enclosure enveloping the plurality of printing towers.

The printing machine preferably has longitudinal cutters for longitudinally cutting the web B or the plurality of webs B and preferably even more webs. Such longitudinal cutters can be arranged upwards from the printing gaps, ie between the respective reel unwinding device and the respective most upward printing nip of each web. Preferred embodiments, it corresponds to one or more slitter per web is arranged downstream of the respective downward pressure nip and upwards of the respective associated turning days or are. If one or more additional printing device (s) 6, 7 is or are disposed downstream from the most downstream printing nip of the respective web B, the auxiliary printing device (s) 6, 7 may or may still be downstream of the longitudinal cutter (s) of the particular web B or, as preferred, upwardly of the slitter (s), but in any case downwardly of the respective slump roll 9a or 9b or 9c, respectively, and in close proximity to the slitter (s). In the in FIG. 1 Slitter can be arranged in particular on the web path between the drying device 15 and the turning floors 16a and 16b production variant shown. If the additional printing devices 6, 7 are not fixedly assigned to the respective roll unwinder 1 or 2, as in the third embodiment variant, but are fixedly assigned to the turning bar floors 16a or 16b as in the third production variant, then the additional pressure devices between the drying device 15 and the slitters or alternatively be arranged downstream of the slitters.

When fixedly assigned to the turning floors 16a or 16b, it also corresponds to preferred embodiments when auxiliary pressure devices 6, 7 are or are arranged in the vicinity of an inlet rod or inlet roll or outlet roll or outlet roll of the turning floors 16a or 16b. One or more auxiliary pressure devices (s) 6, 7 may or may also be arranged spatially directly at deflecting rods or rollers arranged laterally from the actual reversing floors 16a and 16b.

The FIGS. 4 and 5 show variants for the arrangement of the additional printing device 6, 7th FIG. 4 shows the arrangement of the two pressure parts 6 and 7 in the region of a flat web guide, FIG. 5 shows the arrangement immediately in each case a guide roller 5. In FIG. 4 the printing parts 6 and 7 are arranged opposite one another via the web B passing through between the printing parts 6 and 7, so that the web B is printed on both sides at the same location. In FIG. 5 is the one printing part 6 in the Umschlingungsbereich of in the path of the web B upward guide roller 5 and the other pressure member 7 in the wrap region of the next in the conveying direction F guide roller 5 and the respective guide roller 5 facing outwardly arranged opposite. FIG. 3 shows one of FIG. 5 modified arrangement of the printing parts 6 and 7. In the arrangement of the printing parts 6, 7 in the area of the free paper guide the pressure parts 6 and 7 are not arranged opposite each other at the same location, but may be arranged in the conveying direction F with an offset to each other.

FIG. 6 shows variants for the arrangement of the printing parts 6 and 7 of the auxiliary printing device 6, 7 in a fixed assignment to the paster 1 or 2, wherein each of the printing parts 6 and 7 is also understood as an additional printing device. The biasing mechanism 3 comprises stationary deflecting bodies. 3a and 3c, which are preferably each rotatable about their longitudinal axis, and a compensating deflecting body 3b movable in space for length compensation of the web B. For simplicity, only three deflecting bodies 3a, 3b and 3c are shown. In most applications, the biasing mechanism 3 comprises further such deflecting bodies, in particular a plurality of compensating deflecting bodies 3b. The pressure part 6 is still arranged in the biasing mechanism 3, namely directly in one of the stationary deflecting body, in the embodiment, the downward deflecting 3c. The printing part 7 is arranged in the immediate vicinity of the guide roller 5. Both printing parts 6 and 7 are arranged so that they still print in the region of the respective looping on the web B, whereby a particularly stable guidance of the web B is achieved during the additional pressure. In a modification, the pressure part 7 could also be arranged at another of the stationary deflecting bodies 3a and 3c of the pretensioning mechanism 3, in particular in the same way as the pressure part 6 at the deflecting body 3c. Of the deflecting bodies of the biasing unit 3 is a preferred candidate for such an arrangement of the pressure parts 6 and 7 of the downstream in the conveying direction F deflecting, for in the embodiment of the FIG. 6 the deflecting 3c is representative.

Reference numerals:

1

unwinder

2

unwinder

3

tensioners

4

-

5

guide roll

6

Additional pressure device, pressure part

7

Additional pressure device, pressure part

8th

inlet roller

9a

Deflection body, outlet roller

9b

Deflection body, outlet roller

9c

Deflection body, outlet roller

10

printing tower

11

pressure cylinder

12

pressure cylinder

13

pressure cylinder

14

pressure cylinder

15

drying device

16a

turning floor

16b

turning floor

17

longitudinal folding

18

folding

B

train

F

conveying direction

M

machine level

Claims (15)

Comprising newspaper printing machine a) a roll unwinder (1) for a web (B), b) a first impression cylinder (11; 13) and an impression cylinder (11; 13) for forming a first printing nip for the web (B), c) a further, second printing cylinder (12, 14) for forming a second printing nip, by means of which the web (B) can be conveyed downwardly in the conveying direction (F) from the first printing nip, d) wherein the first printing nip is an upward most in the conveying direction (F) and the second printing nip is a downward pressure nip for the web (B), if the web (B) is passed through more than one nip, e) a folding apparatus (18) to which the web (B) or from the folded newspaper copies are or can be conveyed, f) and an additional printing device (6, 7) for the web (B), g) wherein the auxiliary printing device (6, 7) upwardly from the first impression cylinder (11; 13) in fixed association with the Rollenabwickler (1) or downwards from the second impression cylinder (14) in fixed association with the folding apparatus (18) is arranged. Newsprint printing machine according to the preceding claim, further comprising h) a Rollenabwickler (2) for a further web (B), i) a further first printing cylinder (11; 13) and a further impression cylinder (11; 13) for forming a first printing gap for the further web (B), j) a further second printing cylinder (12, 14) for forming a second printing nip, by means of which the further web (B) can be conveyed downwardly in the conveying direction (F) from the first printing nip, k) wherein the first printing nip is in the conveying direction (F) the most upwardly and the second printing nip a Abwärtigster printing nip for the further web (B), if the further web (B) is guided by more than one nip, l) and a further additional printing device (6, 7) for the further web (B), m) wherein the further web (B) or from the further web (B) obtained by slitting part webs to form the newspaper copies to the folder (18) is or is conveyed n) and wherein the further auxiliary printing device (6, 7) with respect to the conveying direction (F) of the further web (B) upwardly from the first printing cylinder (11) for the further web (B) in a fixed assignment to the second Rollenabwickler (2) or downwardly from the second impression cylinder (14; 12) for the further web (B) in fixed association with the folder (18). Newspaper printing machine according to one of the preceding claims and at least one of the following features: the auxiliary printing device (s) (6, 7) is or are arranged outside a virtual envelope which co-envelopes the printing cylinders (11-14); the printing cylinders (11-14) are arranged in at least two adjacent printing towers (10) and the additional printing device (s) (6, 7) are or are arranged outside a virtual wrapping enveloping the printing towers (10); - The Zusatzdurckvorrichtung (s) (6, 7) is or are located lower or higher than a pressure cylinder (11-14) co-enveloping virtual enclosure. Newspaper printing machine according to one of the preceding claims, characterized in that the Zusatzdruckvomchtung (s) (6, 7) arranged at one or in each case at a deflecting body (3c, 5) for the web (B) and a circumference of the deflecting body (3c, 5) is facing or are to provide the web (B) in the looping of the deflecting body (3c, 5) or the respective deflecting body (3c, 5) with an additional pressure. Newspaper printing machine according to one of the preceding claims and at least one of the following features: the web (B) can be conveyed via an inlet roller (8) to the pressure cylinders (11-14, 13, 14, 11, 12) and the auxiliary pressure device (6, 7) is arranged upwards from the inlet roller (8); - the additional printing device (6, 7) is arranged on the path of the web (B) between the Rollenabwickler (1, 2) and the first printing nip; - The Rollenabwickler (1, 2) and the additional printing device (6, 7) are lower than a machine plane (M), preferably below the machine plane (M) on which the printing cylinder (11-14; 13, 11, 12) are supported , arranged in a roller cellar. Newspaper printing machine according to one of the preceding claims, characterized in that downstream of the reel unwinder (1, 2) a biasing mechanism (3) and downstream of the biasing mechanism (3) a guide roller (5) are arranged, via which the web (B) to the Pressure cylinders (11-14; 13, 14, 11, 12) is conveyed, and that the auxiliary pressure device (6, 7) is arranged at or up from the guide roller (5). Newspaper printing machine according to the preceding claim, characterized in that the additional printing device (6, 7) in the conveying direction (F) down from the biasing mechanism (3) or in the biasing unit (3) in a fixed assignment to a deflecting body (3c) of the biasing unit (3) is arranged. Newspaper printing machine according to the preceding claim, characterized in that the additional printing device (6, 7) is arranged at a last deflecting body (3c) of the pretensioning mechanism (3) in the conveying direction (F). Newspaper printing machine according to one of claims 1 to 4, characterized in that the additional printing device (6, 7) on a first path of the web (B) downstream of the second printing cylinder (14) and a further additional printing device (6, 7) on an alternative second Path of the web (B) is arranged downstream of a second second printing cylinder (12) for the web (B) on the second path. Newspaper printing machine according to one of claims 1 to 4 or the preceding claim, characterized in that optionally either the web (B) on a first path through the pressure nips of the first printing cylinder (11) and the second printing cylinder (14) or the web (B) can be conveyed on a second path through the printing nip of the second printing cylinder (14) and a further web (B) through the printing nip of the first printing cylinder (11), - That a first of the deflecting body (9a) on the first path of the web (B) downwards from the second pressure cylinder (14) and a second deflecting body (9b, 9c) in the conveying direction (F) of the further web (B) on their way down from the first impression cylinder (11) is arranged - And that the additional pressure device (6, 7) on the first way down from the first deflecting body (9a) and a further auxiliary pressure device (6, 7) on the way the further web (B) is arranged downwards from the second deflecting body (9b, 9c). Newspaper printing machine according to one of the preceding claims, further comprising a first turn-around position (16a) with turning bars for the web (B), optionally a second turning floor (16b) with further turning bars for a further web (B), - wherein the additional printing device (6, 7) in fixed association with the first turning floor (16a) and optionally a further additional printing device (6, 7) in fixed association with the second turning floor (16b) close to the turning floor (s) (16a 16a, 16b) is or are arranged. Newsprint printing machine according to one of the preceding claims, further comprising a longitudinal cutter by means of which the web (B) can be cut longitudinally into partial webs, and a reversing floor (16a, 16a, 16b) with turning bars for the web (B) or partial webs, wherein the auxiliary printing device ( 6, 7) upwardly from the turning floor (16a, 16a, 16b) and either upwards or downwards from the slitter, preferably at the same height as the arrangement of the turning bar floor (16a, 16a, 16b) and slitter. Newspaper printing machine according to one of the preceding claims and at least one of the following features: - The additional printing device (6, 7) prints contactlessly; the additional printing device (6, 7) is an inkjet printer; - The additional printing device (6, 7) operates on an electrophotographic process; - Print cylinders (11-14) print in wet or dry offset. Newspaper printing machine according to one of the preceding claims and at least one of the following features: - The impression cylinder (11-14) and the additional printing device (6, 7) are synchronized with each other via a common virtual, preferably electronic or optical master axis; - in the vicinity of the additional pressure device (6, 7), preferably downwards from the auxiliary pressure device (6, 7) and upwards from a in the conveying direction (F) Next component acting on the web (B), a sensor for monitoring the circumferential register of the auxiliary pressure device (6, 7) is arranged; - In the vicinity of the printing cylinder (11-14), a sensor for monitoring the circumferential register of the printing cylinder (11-14) is arranged; - It is a controller for automatically controlling the position of a means of the additional printing device (6, 7) on the web (B) printed imprint according to circumferential or side register provided. Method for variably printing a web in newspaper printing, in which a) the web (B) from a Rollenabwickler (1, 1, 2) unwinds, b) printing on the web (B) or partial webs obtained therefrom by longitudinal cutting in a primary printing process, preferably offset printing process, by means of at least one printing cylinder (11-14; 13, 14, 11, 12) a complete newsprint image, c) the web (B) or partial webs are cross-folded in a folder (18) for the production of newspaper copies or are d) and the web (B) or partial webs by means of an additional printing device (6, 7) variable, preferably individually with respect to the newspaper copies, is printed or are, e) and in which the variable pressure is made in fixed association with the roll unwinder (1) upstream of the primary printing process or in fixed association with the folding apparatus (18) downstream of the primary printing process.

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