EP1634833A2 - Printing machine comprising at least one printing group. - Google Patents

Abstract

Printing machine comprises at least one printing group (03), a folding device, and at least one turning and mixing stage (07) feeding a web (04, 06) from the printing group to the folding device. The path of the web projected in the horizontal direction from the printing group to the folding device has a bend in the turning and mixing stage. The turning and mixing stage has an inlet-side longitudinal cutting device (08) for cutting the web into two partial webs and at least two horizontally displaceable turning bars each surrounded by a partial web. Independent claims are also included for alternative printing machines. Preferred Features: The turning bars are parallel to the path of the web between the printing group and the turning and mixing stage.

Description

The invention relates to a printing machine with at least one printing unit according to the preamble of claim 1.

There are simply wide and double wide printing units known, i. Printing units whose width is such that they are capable of carrying two or four printing plates next to one another. When a single width printing press is used to print a broadsheet product, the printed strand is longitudinally folded in the folder's former hopper and then cut into signatures. It is also possible to print tabloid products if there is a longitudinal cutting device between the printing stage and the folder which slits the printed web centrally. In this case, the two partial webs are superimposed in the former, cut into pieces and a signature is formed only by subsequent transverse folding of the cut pieces. Switching between tabloid and broadsheet production is comparatively easy, even though webs of different widths are used for both productions. When the webs are centered through the press with respect to a center line, the slitter and nose of the former are always properly positioned.

Double-width printing stages are capable of printing four printed pages side by side across the width of a web. Such a double-width web must, before it passes through a turning and mixing stage, be cut longitudinally at least once in the middle to produce two partial webs each having two sides of width. After mixing and optionally turning these are in turn fed to the formers of a folder. If such a machine is to be able to process webs of varying widths, then either the position of the former must be equal to the width of the web Be adaptable web, or if it is fixed, the turning and mixing stage must be able to laterally offset the two partial webs by a fraction of their width so that they hit correctly centered on the former and the longitudinal fold in the right place is produced. When broadsheet products are produced with insert sheet or tabloid products, the part webs produced by the first slitter must be divided again by means of two slitters. This is only possible correctly with changing web widths if at least the second longitudinal cutting devices are displaceable transversely to the web.

These problems make it seem reasonable to use wide presses for print jobs that require the use of webs of varying widths. However, this has the disadvantage that the number of single-width printing units required to produce a signature with a given page size is twice as large as the number of double-width printing units required for the same purpose, and that two simple-width printing units are being manufactured and consequently also much more expensive to buy than a double-width printing unit. In addition, the double-wide printing presses available on the market are often designed for higher web speeds than simply wide-format presses, so that to build a high-performance, single-width press can not rely on existing components, but redesign the print works ,

DE 197 28 207 A1 discloses a printing machine with two arranged between printing towers turning towers, which deflect the transverse to the cylinder axes of the printing units running tracks along the cylinder axes and lead to a folder, wherein the formers are arranged transversely to the cylinder axes.

DE 44 19 217 A1 shows a printing machine with a Längsfalztrichter whose width has approximately the width of the printing units.

By the article in the Polygraph 1965, pages 508 to 512 "folding devices on roll gravure printing machines" by Engelbert Muth, it is known, for example, to adjust paper webs by moving turner bars laterally.

The article "The folding structure (superstructure)" by Wolfgang Walenski, "The web offset printing", 1 st edition Fellbach: Fachschriften- Verl. 1995, pages 186-197 discloses various web guides by turning bars to funnels. For example, it is shown on page 194 to cut a web into two partial webs, to superimpose these partial webs and to supply them centrally to a funnel.

The US 37 34 487 A shows sliding turner bars.

DE 101 31 976 A1 discloses printing machines for variable web widths with a straight path and several hoppers next to each other.

The invention has for its object to provide a printing machine with at least one printing unit.

The object is achieved by the features of claim 1.

Among the advantages of the printing press is a simple, compact design that allows to dissect a printed web into two sub-webs and to place these sub-webs in a simple manner, regardless of their width exactly on top of each other.

This is achieved essentially by the fact that the turning and mixing stage of the printing press projects the projected horizontally projected path of the web from the printing unit to the folder sideways by means of two deflection bars, which are wrapped by a respective part of a web, which a slitter from one of the Wendeund Mixing fed fed printed web, and that these two deflection rods are horizontally displaceable.

In principle, these two deflection rods can be displaceable in any direction which is not parallel to their axis in order to determine the position at which the component webs emerge from the turning and mixing stage. However, a displacement is preferably parallel to the path of the web between printing unit and turning and mixing stage. In such an arrangement, the region of a deflection bar which is looped around by the partial web does not change when it is displaced, so that the displaceability range of the webs extending from the turning and mixing stage to the folder is limited only by the freedom of movement of the deflection rods.

Assuming that each web processed in the printing press is cut longitudinally and the resulting part webs are overlapped before entering the folder, or assuming that webs exceeding a predetermined limit width are always cut while webs with Underlying width can also remain uncut, space and cost can be saved if the folder is built narrower than the printing stage, more precisely, if an input of the folder - which must be able to handle any webs with the full processable width of the printing unit - is narrower as an output of the printing unit.

Preferably, the printing unit is twice as wide, and the folder is designed only for processing single-width webs.

The turning and mixing stage has two or three deflection rods for deflecting a web or its part webs cut from it. Since it is not necessary to be able to move one of the deflection rods over the other, all can Be guided deflection rods in a common guide rail. In this case, at least one deflecting rod has the length required for deflecting a web of maximum width; each additional deflection bar can be shorter.

Because of the displaceability of the deflecting bars, each web fed to the folder has considerable freedom of movement in the transverse direction, mobility of the former is not required in order to achieve correct alignment of the web or the part webs on the former.

A second longitudinal cutting device for longitudinal cutting of a partial web is preferably arranged at the turning and mixing stage on the transport path of the web behind a deflection bar, that it acts on a deflected part of the deflection bar. It is expediently centered on the former, so that its cutting line coincides with the nose of the folding cylinder. Since the web fed to the second longitudinal cutting device is transversely displaceable with the aid of the deflecting rod and therefore can always be fed exactly centered regardless of its width, a displaceability of this longitudinal cutting device is also unnecessary.

At a side facing away from the folder side of the turning and mixing stage preferably a turning bar is attached. Whereas in the case of a web which is merely guided around a deflection bar, the top and bottom are interchanged when passing through the turning and mixing stage, it is also possible to loop around the turning bar around the web, and the web can pass through the top and bottom without interchanging to lead the turning and mixing stage.

If several turning and mixing stages are arranged at the same time for processing a plurality of webs, such a turning bar can also be used to exchange webs between the turning and mixing stages.

The second longitudinal cutting device can be arranged on the path of a web from one turning and mixing stage to the other. The two partial webs generated by this longitudinal cutting device can each be supplied to different turning and mixing stages. It is also possible to place the second longitudinal cutting device directly at the exit of the turning and mixing stage, this is particularly useful for the printing of tabloid products.

If the printing press comprises more than two printing units, then the turning and deflecting stage is preferably arranged between the two, so that their webs can be selectively fed from both sides.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

eine schematische Seitenansicht einer erfindungsgemäßen Druckmaschine;

Fig. 2

eine Draufsicht auf die Druckmaschine aus Fig. 1;

Fig. 3

eine schematische Darstellung von zwei Wende- und Mischstufen der Druckmaschine;

Fig. 4 bis 6

Beispiele von Bahnführungen in den Wende- und Mischstufen; und

Fig. 7 bis 9

verschiedene Arten, eine Papierbahn in der erfindungsgemäßen Maschine zu schneiden und zu falzen.

Show it:

Fig. 1

a schematic side view of a printing machine according to the invention;

Fig. 2

a plan view of the printing machine of FIG. 1;

Fig. 3

a schematic representation of two turning and mixing stages of the printing machine;

4 to 6

Examples of web guides in the turning and mixing stages; and

Fig. 7 to 9

various ways to cut and fold a paper web in the machine according to the invention.

Fig. 1 is a schematic side view of a printing machine according to the invention. Two reel changers 01 are connected to a printing tower 02 with five printing units 03 for printing on both sides of a web 04 passed through; 06 arranged. The unwound from the roll changers 01 tracks 04; 06 are feasible on different ways through the printing tower 02. Shown is a configuration in which the web 04 passes through the lower four printing units 03 and is printed in four colors, and the web 06 is printed black and white in the uppermost printing unit 03. Of course, configurations can also be set in which one of the tracks 04; 06 two and the other passes through three printing units, etc.

The printed in printing tower 02 tracks 04; 06 are each supplied to one of two turning and mixing stages 07, which are arranged one above the other and, as the plan view of FIG. 2, in a rectilinear series with the roll changers 01 and the printing tower 02.

In extension of this series, another, in dashed lines in Fig. 1 and 2 illustrated printing tower 02 'and roll changer 01' may be arranged for its supply. In this printing tower 02 'printed webs 04'; 06 'are also supplied turning and mixing stages, which form a stack with the stages 07.

Between the printing tower 02 and the turning and mixing stage 07 there is a longitudinal cutting device 08, e.g. in the form of two draw rollers rotating in contact with each other, between each of which a web 04; 06 is performed, and one of which carries a rotating blade. The longitudinal cutting device 08 is required by the tracks 04; 06 off so that they pass through uncut.

Each turning and mixing stage 07 essentially comprises three at an angle of 45 ° to the transport direction of the web 04; 06 arranged deflecting rods 09; 11. The Length of the middle deflection bar 11 is dimensioned so that it is capable of a web 04; 06 with the maximum width processable by printing tower 02 can be deflected by 90 °; the two outer deflection rods 09 have a smaller, each for deflecting a partial web 13 generated at the longitudinal cutting device 08; 14; 21; 22 designed width. The deflecting rods 09 and 11 are independently displaceable in horizontal rails 12, which are aligned along the reel splitter 01, printing tower 02 and turning and mixing stage 07 connecting line. The web 04 or 06 leaves the turning and mixing stage 07 deflected by 90 °. In this case, the two short deflection rods 09 are each placed so that generated at the longitudinal cutting device 08 partial webs 13; 14; 21; 22 come to lie exactly above each other at the output of the turning and mixing stage 07. This is independent of the width of the supplied web 04; 06 possible because the deflection rods 09 are mutually displaceable. Also by moving the deflecting rods 09 and 11, it is possible, the exiting from the turning and mixing stage 07 web 04; 06 or partial webs 13; 14; 21; 22 align exactly on a former 17 of a folder 16 and to fold them so centrally along.

The turning bars 09; 11 are about a vertical axis by 90 ° or about a horizontal to the web transport direction parallel axis by 180 ° pivotally about a looped around track 04; 06 or partial web 13; 14; 21; 22 first to lead to a turning bar 18 where it is turned by 180 ° and finally fed to the former 17. A longitudinal axis of the inlet of the former 17 is arranged at 90 ° to the longitudinal axis of a cylinder of the printing unit 03.

The turning bars 18 also serve partial webs 13; 14; 21; 22 to exchange between different turning and mixing stages 07, as is clear from FIGS. 3 to 6. 3 shows a schematic view of two superposed turning and mixing stages 07, each with two short deflection rods 09 and one long deflection rod 11, which are held in frame elements 19. Two triangles symbolize two superposed formers 17 of the folding apparatus 16. These opposite a plurality of groups of turning bars 18 are arranged; each deflecting bar 09; 11 three turning bars 18 are assigned. Dashed lines symbolize possible web guides.

Concrete examples of web guides are shown in Figs. 4-6. Fig. 4 shows a simple example in which in the upper turning and mixing stage 07 two partial webs 13 produced from the web 06; 14 and in the lower turning and mixing stage 07 from the web 04 generated partial webs 21; 22 deflected and directly, while maintaining their order, the upper former 17 are fed. Of course, one or more lower partial webs 21; 22 or all partial webs 13; 14; 21; 22 are guided on the lower former 17.

In the configuration of FIG. 5, the partial web 21 is guided over the turning bars 18 in the upper turning and mixing stage 07 and is fed from there from the former 17 as the uppermost web 21. Thus, a printed product is obtained whose outermost and innermost sheets each have a different color than the two intermediate sheets. Of course, it would also be possible to supply the partial web 21 between the partial webs 13 and 14 to the former 17. In the same way, every other partial path 13; 14; 21; 22 are exchanged between the turning and mixing stages 07, or it could also be several partial webs 13; 14; 21; 22 be replaced at the same time.

A arranged on the turning bars 18 longitudinal cutting device 23 allows a partial web 13; 14; 21; 22, in the case of FIG. 6, the partial web 21, in the middle in two half-width partial webs 21 a; 21 b to disassemble, each resulting in the configuration shown here, a single inner leaf in the two formers 17 fed strands. The longitudinal cutting device 23 of FIG. 6 is arranged at a position where they each act on an exchanged between the turning and mixing stages 07 partial web 21 can. It would also be conceivable, each sub-train 13; 14; 21; 22 to assign a longitudinal cutting device 23, for the partial web 21, for example, at the designated 24 location. This would create the possibility of the two partial webs 21 a; 21 b, for example, on the designated 26 way to feed the formers 17. It would also be conceivable to attach a longitudinal cutting device 23 in each case on the direct path between a turning bar 09 and the formers 17, for the sub-web 21 approximately at the location indicated in FIG. 4 at 27, in order to feed the resulting sub-webs to one or more former folders 17 ,

Depending on the width of the webs 04 used; 06 results in a wide variety of production possibilities. Fig. 7 illustrates a newspaper production in broadsheet format. The plate cylinders of the double wide printing units 03 carry four plates side by side and print four pages 28 with horizontal lines next to each other.

The printed web 04 is at the longitudinal cutting device 08 in the two partial webs 13; 14 disassembled. The longitudinal cutting device 08 need not be displaceable transversely to the web 04, because even if webs 04 of different widths are used, they are always guided centered by the printing unit 03, so that the boundary line 29 between the second and third sides always exactly on the blade Slitter 08 meets. By moving the Umlenkstangen 09 in the feed direction of the web 04, ie in the vertical direction in the figure, the diverted to the Umlenkstangen 09 partial webs 13; 14 are aligned exactly so that the boundary line 31 between the two sides of the partial webs 13; 14 exactly meets the nose 32 of the former 17, so that a longitudinal fold in this boundary line 31 is generated. One by separating the folded part webs 13; 14 obtained signature 33 includes eight pages on two nested sheets. Different page numbers are of course by adding additional partial webs 21; 22 reachable on the former 17. Since it is always possible by moving the Umlenkstangen 09, the boundary lines 31 of the partial webs 13; 14 to align the folding nose 32, regardless of the width of the partial webs 13; 14, no lateral adjustability is required for the former 17. Tracks 04; 06 different widths are therefore very easy to use.

8 shows the processing of a web 04 printed in tabloid format. Here, four double pages 34 are printed side by side with vertical orientation of the lines. In the same way as described with reference to Fig. 7, the web 04 is cut at the boundary line 29 by the slitter 08, and the resulting part webs 13; 14 are superimposed with the help of the Umlenkstangen 09. Another longitudinal cutting device 23 separates the partial webs 13; 14 along the boundary line 31, so that in the former 17, the resulting four partial webs are simply superimposed. Separate and Querfalzen results in the finished signature 36, which has sixteen pages on four sheets here, but the page number could also be doubled by collecting operation at the cross folds or enlarged by adding further partial webs.

Fig. 9 illustrates the operation of the machine according to the invention in commercial printing. The web 37 used for this purpose is narrower than the web 04 used for newspaper printing, as viewed in FIGS. 7 and 8, the edges of which are shown in FIG. 9 as dotted lines. The longitudinal cutting device 08 is turned off the web 37, and the web 37 is undivided deflected at the long deflecting rod 11 to the former 17 and folded in this.

Of course, even in commercial printing, depending on the width of the web 37 and page size of the finished product, ways of processing with slitting as shown in Figs. 7 and 8 would be possible.

In printing machines with at least one double-width printing unit 03 and a former 17, a former 17 is used, which is wider than half the width of the Printing unit 03, ie the effective pressure surface of the cylinder, is. Double-wide means that the printing unit 03 has at least a width of four newspaper pages.

In another embodiment, in one mode of operation, a more than single wide web 04; 06, ie a web 04; 06 with a width of more than two newspaper pages, but smaller than a double-width web 04; 06 is located centrally in the printing unit 03. The printing unit 03 prints while the web 04; 06 with two newspaper pages. In another mode of operation, a slitter 08 is arranged to form a double-width web 04; 06, ie, a four-page pages having web 04; 06, halved and the two resulting webs 13; 14; 21; 22 are arranged on the former 17.

LIST OF REFERENCE NUMBERS

01

reelstands

02

printing tower

03

printing unit

04

train

05

-

06

train

07

Steps, turning and mixing stages

08

Slitter

09

Turning bar, short

10

-

11

Turning bar, long

12

rails

13

Train, subway

14

Train, subway

15

-

16

folding

17

formers

18

turning bar

19

frame member

20

-

21

Train, subway

22

Train, subway

23

Slitter

24

Job

25

-

26

path

27

place

28

page

29

boundary line

30

-

31

boundary line

32

nose

33

signature

34

spread

35

-

36

signature

37

train

01 '

reelstands

02 '

printing tower

03 '

printing unit

04 '

train

06 '

train

21 a

part web

21 b

part web

Claims (3)

Printing machine with at least one printing unit (03), wherein the printing unit (03) is double wide, ie has at least a width of four newspaper pages and a former (17), wherein in a first mode of operation a more than single wide web (04, 06) ie a width of more than two newspaper pages, but smaller than a double-width web (04; 06), is arranged centrally in the printing unit (03), wherein one longitudinal cutting device (08) in another mode of operation has a double-width web (04; ), ie four web pages (04; 06), halved and the two resulting webs (13; 14; 21; 22) are arranged on the former (17), characterized in that in this first operating mode the printing unit (03) the web (04; 06) is printed with two newspaper pages arranged such that a longitudinal axis of the inlet of the former (17) is arranged 90 ° to the longitudinal axis of a cylinder of the printing unit (03). Printing machine according to claim 1, characterized in that arranged immediately before the former (17) former inlet roll is arranged 90 ° to the longitudinal axis of the cylinder of the printing unit (03). Printing machine according to claim 1, characterized in that the former (17) is wider than half the width of the printing unit (03).

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