EP1718463B1 - Printing machine comprising a former - Google Patents

Abstract

A printing machine includes a printing cylinder that is fitted with plates for printing the width of N pages. A web of material is printed and is then cut longitudinally, by an elongate cutting device, into printed webs. The number N of pages is a whole number that is divisible by three and the total width of N pages is less than the width of the printing cylinder. A width of N+1 pages is greater than the width of the printing cylinder. The elongate cutting device can be arranged, on one boundary, between a Kth and a Kth+1 page, wherein k is one third or two thirds of N. At least one of the resulting partial webs is guided through a former. The former is oriented so that the direction of travel of the web entering the former is transverse to the direction of web travel in the elongated cutting device. The former has a width that is equal to, or greater than two thirds of the width of the printing cylinder, but is less than the entire width of the printing cylinder.

Description

The invention relates to a printing machine according to the preamble of claim 1 or 2.

It is for example off W. Walenski, "The Web Offset Printing", 1996, pages 186 and 187 a folding structure of a printing press is known in which a material web is cut into two partial webs, the partial webs are superimposed in a further course of production and centered folded. or again cut longitudinally. For webs side-by-side printed according to Walenski, page 81, the width of the pages in such a case would be one quarter the width of the printing cylinder or slightly less if a web of lesser width than that of the printing cylinder is to be printed.

If the page number of a printed product to be produced is not sufficient to fill four pages side by side, the plate cylinder can also be equipped with a reduced number of printing plates to print three, quarter or quarter widths of three, two or one side side by side. In each case, at least a quarter of the width of the plate cylinder and thus a quarter of the production capacity of the machine remains unused.

In particular, if such a machine is to be used for semi-commercial printing, tasks with unfavorable page formats may occur where four sides are wider than the plate cylinder side by side or where four sides next to each other, the width of the plate cylinder is poorly used, but a doubled page number Width of the plate cylinder exceeds.

The EP 0 814 044 A1 discloses a web guide a plurality of longitudinally cut along a longitudinal cutting means partial webs towards a former, which is oriented such that its direction of entry extends transversely to the web running direction in the region of the longitudinal cutting device.

The DE 20 39 844 B shows a web guide in a printing machine with a longitudinal cutting device, which is positioned so that it divides the web into a 1/3 and a 2/3 partial web. The two partial webs are guided on a transverse to the web direction movable former.

The invention has for its object to provide a printing machine with improved web width utilization.

The object is achieved by the features of claim 1 or 2.

In contrast to known printing machines, in which a longitudinal division of an original material web is provided in partial webs with one or two thirds of the original width only at the beginning of three-quarters wide webs or web, so in webs that fill at most three quarters of the width of the plate cylinder is such a printing machine set up to make such a third division even with wider tracks. In the optimal case, the entire width of the plate cylinder can be used for printing a divisible by three number of sides side by side.

At least one of the partial webs can be guided by a former. When passing through the former, the web is folded in the middle. It is possible to provide at least one longitudinal cutting device in a vertex of the former for cutting the at least one folded partial web in the longitudinal direction of its fold line.

The printing machine preferably has a cross cutter for cutting the partial webs into signatures.

The printing machine can also be provided with a folding apparatus. The folder may, for example, be a cross folder such as a jaw cylinder or other known cross-fold device. In this case, the cross cutter may in particular be a cutting blade cylinder attached to a jaw cylinder of the folder.

For the production of stapled products, the printing press may further comprise a stapling device for stapling the signatures.

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

Fig. 1

eine schematische Darstellung eines Teils einer bekannten Druckmaschine;

Fig. 2

eine schematische Darstellung eines Teils einer ersten Druckmaschine;

Fig. 3

eine schematische Darstellung eines Teils einer zweiten Druckmaschine;

Fig. 4

eine schematische Darstellung eines Teils einer dritten Druckmaschine.

Show it:

Fig. 1

a schematic representation of a part of a known printing machine;

Fig. 2

a schematic representation of a portion of a first printing machine;

Fig. 3

a schematic representation of a portion of a second printing machine;

Fig. 4

a schematic representation of a portion of a third printing press.

A part of a known printing press in carrying out a semi-commercial print job is shown schematically in FIG. From a material web 01, in particular paper web 01 or web 01, with a width of 32 "(812.8 mm) The material web 01 is guided over a printing cylinder 02 rotatably mounted in a frame 03, for example a forme cylinder 02, which is immediately a plate cylinder 02 or, in the case of indirect printing processes, may be a transfer cylinder 02 rolling in contact with a plate cylinder 02. An impression cylinder which presses the material web 01 against the impression cylinder 02 is not shown in FIG Plate cylinders 02 are fitted circumferentially with two sets of printing plates, each set comprising in each case four printing plates in width For each full revolution of the plate cylinder 02, eight fields A, B, C, D, E corresponding to a printing plate are respectively formed on the material web 01; The fields A; B; C; D are thereby printed by the four plates of the first set, while the fields E; F; G; H of the printing plates of the second set are printed. In Fig. 1, the fields A; B; C; D; e; F; G; H, which are printed with each revolution of the printing cylinder 02 on the web 01, indicated by diagonal crossed out rectangles.

The material web 01 is guided over a turning bar 04 in a former 06, in which it is longitudinally folded along. In FIG. 1, next to the former 06, the action of the former 06 on the fields A; B; C; D; e; F; G; H illustrates: A longitudinal crease is created between fields B and C and between fields G and F.

Following the former 06, a longitudinal cutting device 07 is arranged in a vertex of the former 06. It can be switched on as required to separate the material web 01 at the longitudinal fold in two equally wide superimposed partial webs. These are cut into signatures with two sheets in a cross cutter 09, formed by a knife cylinder and an impression cylinder, which rotate together. A first of these leaves comprises the fields A; B; F; E, and a second of these sheets comprises the fields C; D; G; H. In these signatures, leaves lie on one another such that fields A and D, B and C, E and H, and F and G each cover, as the small representation next to the cross cutter 09 can be seen.

The signatures reach a cylinder 08, z. As a Punktur- and folding blade 08, which is provided in a conventional manner with Punkturleisten or grippers for holding the signatures and folding blades. From the puncturing and folding blade cylinder 08, the signatures are applied to a cylinder 11 attached to the punching and folding blade cylinder 08, e.g. Handed over jaw cylinder 11. In this case, a transverse folding of the signatures takes place with a transverse fold line on the first sheet between the fields A and E and between B and F, and on the second sheet between the fields C and G and between D and H. This shows the small figure next to the cylinders 08; 11th

To the cylinders 08; 11 is followed by a cross cutter 09 equivalent cross cutter 13, which cuts the signatures along the Querfalzkanten. The result is four overlapping leaves with two fields each. Again, a small figure shows the situation after passing through the cross cutter 13. Here, the uppermost sheet comprises the fields G and H.

Finally follows a folder 12, in which the signatures are folded once again. The longitudinal fold takes place between the respective fields of the leaves of the signature, which is also illustrated by a small figure. Thus, the press produces products with four longitudinally folded sheets and 16 pages.

As can be seen in Fig. 1, the printing machine is designed for the processing of wider material webs than the present material web 01 with a width of 32 "On both sides of the material web 01 remains an unused supernatant of the printing cylinder 02 a usable width b02 of his bale. By width or usable width b02 of the cylinder 02 should be understood its width, which a maximum pressure or

Represents color transfer area. This can be the maximum transferable paper widths in the transfer cylinder, for example, and in the case of forme cylinders, the maximum width that can be assigned to printed images. Not included are cones, possibly additionally present bearer ring width or other auxiliary equipment. The usable width b02 essentially also corresponds to a maximum possible web width width b _{max of} the maximum web 19 to be processed (see FIG. 2). The maximum web width width b _max is either z. B. insignificantly smaller than the width b02 of the cylinder 02 formed as a forme cylinder 02 or corresponds to this in the extreme case. If you wanted to produce a product with 8 "page width with the illustrated printing press from a wider material web, in order to use this supernatant, then this wider web of material would have four side widths of the product wider, thus a total width of 64" (1,625.6 mm) exhibit. This would, however, exceed the width of the printing cylinder 02 and would no longer be processable with the printing press shown. Therefore, one is bound to the production of a product with 8 "page width in the illustrated printing press on the use of a web of material 01 with a maximum web width of 32", which also on both sides of the web 01 a large projection of the printing cylinder 02 must be taken into account.

In Fig. 2, a corresponding part of a printing machine is shown schematically. In this case, the same reference numerals designate the same components as in Fig. 1. In contrast to Fig. 1, in the present printing press, a wider web of material 19 having a width of 48 "(1,219.2 mm) is processed However, the sets here comprise n = 6 printing plates per set, where the number of printing plates n of a set, that is the number of pages in width, is chosen such that n is a whole and divisible by 3 Thus, twelve fields A; B; C; D; E; F; G; H; I; J; K; L are printed on the material web 19 per revolution of the printing cylinder 02, specifically the fields A; B; C D; E; F of the printing plates of the first set and the fields G; H; I; J; K; L of the printing plates of the second set.

A longitudinal cutting device 17 is provided which cuts the material web 19 into a wide part web 14 and a narrow part web 16. The wide partial web 14 has a width of 32 ", which corresponds to two thirds of the width of the material web 19, and the partial web 16 has a width of 16" (406.4 mm), which corresponds to one third of the width of the material web 19. Numbering the fields A printed by a set of printing plates; B; C; D; e; F; G; H; I; J; K; L in the drawing from the bottom to the top, then the slitter 17 is placed on a boundary between the second and the third field, ie between the fields E and D of the first set of printing plates printed fields A; B; C; D; e; F and between fields K and J of the fields G printed by the second set of printing plates; H; I; J; K; L. Thus, the fields A; B; C; D; G; H; 1; J to the broad sub-path 14, while the fields E; F; K; L part of the track 16 belong.

The wide part of web 14 is guided over a turning post 04, while the narrow part of web 16 is guided over a second turning bar 18, that both partial webs 14 and 16 pass through the former 06, in which the wide part of web 14 centered between the fields H and I and between the fields B and C is folded. Part track 16 passes through the former 06 unchanged. Like Fig. 1, Fig. 2 with small sibling figures to illustrate the location of the fields A; B; C; D; e; F; G; H; I; J; K; L provided at the various processing steps. In the case of the printing press shown in FIG. 2, the folded part web 16 embraces the part web 14 after passing through the folding funnel 06. However, it is also possible for the part web 14 to be guided outside the folded part web 16.

At least one of the two turning bars 04; 18 (here at least 04), but advantageously both turning bars 04; 18 has or have an effective length for deflecting at least two-thirds of the width b _{max of} the maximum web 19 to be processed corresponding partial web 14. The effective length here is the resulting length to understand which of the projection of the incoming part of the web on the 45 ° or 135 ° to the inlet direction inclined turning bar 04; 18 results, ie, the length which is required for the deflection of the relevant (here two thirds wide) partial web 14. If both turning bars 04, 18 are designed in this way, the variability with regard to the assignment of the two-thirds-wide partial web 14 to the turning bar 04 or 18 and / or the cutting line between D and E or between B and C increases.

After passing through the former 06, the now folded part web 14 is longitudinally cut as in the previous example of the longitudinal cutting device 07, so that in contrast to the printing press of FIG. 1 in the present printing machine three superimposed partial webs with a respective width of two sides 16 "(50.8 mm) are transferred to the cross cutter 09. The further processing is analogous to the printing machine in Fig. 1. As a finished product leaves a longitudinally folded signature with six sheets and 24 pages, the printing press.

In contrast to the known printing machine of Fig. 1, it is thus possible for the present printing press to produce a product which also has a page width of 8 "by processing a wider material web 19. The product has a higher number of sheets and pages is therefore more economical than the printing machine of Fig. 1 also in terms of the amount of product generated per per cylinder revolution product pages. In addition, the supernatant of the cylinder 02 on both sides of the web 19 is reduced in the printing press, so that the press is far more effective than the known Printing machine from FIG. 1.

A second embodiment of a printing press is shown in FIG. 3. The printing machine of FIG. 3 has two longitudinal cutting devices 17 and 21, which form the material web 19 into three partial webs 22; 23; Cut 24 of the same width. The slitter 17 is at the boundary between as in the previous example placed between the fields E and D and between the fields J and K, while the slitter 21 is placed at a boundary between the fourth and fifth fields, ie between the fields B and C and between the fields H and I. The width of the partial webs 22, 23, 24 corresponds in each case to two printing plates for two pages in width. It includes the sub-web 22, the fields A; B; G; H, the sub-web 23, the fields C; D; I; J, and the partial web 24 the fields E; F; K; L.

Part web 22 is guided over the turning bar 04, part web 23 via a turning bar 26 and part web 24 via the turning bar 18, wherein all three partial webs 22; 23; 24 then pass through the former 06. Following the former 06, in contrast to the printing press of FIG. 2, no longitudinal cutting device is required; the partial webs 22; 23; 24 are folded only centrally in the former 06 and are broken down in this folded state by the cross cutter 09 in signatures and then transferred to the Punktur- and folding blade 08. Here, the signature is transversely folded as in the examples above. Subsequently, the signature is cut in the cross cutter 13 at the transverse fold. The printing machine shown in Fig. 3 provides as a finished product two longitudinally folded signatures simultaneously, each comprising three sheets and twelve pages.

Finally, FIG. 4 shows a modification of the printing machine of FIG. 3, in which, following the former A3, as in the examples of FIGS. 1 and 2, a longitudinal cutting device 07 is provided, which divides the partial webs 22; 23; 24 cuts open after leaving the former. This provides six superimposed partial webs. A against the Punktur- and folding blade 08 employee cross cutter 09 cuts the six partial webs to signatures with six sheets. A likewise employed against the Punktur- and folding blade 08 stapler 27 staples the leaves of a signature along a line at which the signature is transversely folded upon transfer to jaw cylinder 11. The finished product has six stapled sheets and 24 pages.

Both the printing machine of Fig. 3 and the printing machine of Fig. 2 processes a 48 "wide web 19 and thus has the same advantages as the printing machine of Fig. 2, namely a good utilization of the printing press and the ability to products larger number of sheets for a given page width of the product of 8 "to produce than is possible with the known printing machine of Fig. 1.

In generalization of the idea of the invention is a printing machine with at least one forme cylinder 02 for printing a web of material 01; 19 and with at least one longitudinal cutting device 07; 17; 21 for cutting the web of material 01; 19 in partial webs 14; 16; 22; 23; 24, wherein the forme cylinder 02 is equipped with printing plates for n pages in width, where n is a natural number that can be divided into three parts; that n sides in the width smaller and n + 1 sides in width are larger than a width of the plate cylinder 02, and that the slitter 17; 21 is placeable on a boundary between a k-th and a k + 1-th page, where k is one or two-thirds of n.

In the aforementioned embodiments, the former 06 is preferably oriented such that its direction of entry transversely to the web running direction in the region of the longitudinal cutting device 17; 21 runs and / or viewed the direction of entry in plan view of the partial web 14; 16; 22; 23; 24 extends substantially parallel to the longitudinal axis of the forme cylinder 02. In contrast to a straight ahead on the former 06 along or parallel to the machine alignment M, the partial web 14; 16; 22; 23; 24 out of this escape by about 90 ° out. Preferably, each printed web undergoes 01; 19 or partial web 14; 16; 22; 23; 24 on the way from the printing unit to the former 06 only a single such change in direction out of the machine escape out. Simple deflections over deflecting rollers with the axis of rotation perpendicular to the inlet direction are excluded from this.

By the 90 ° to the machine alignment M twisted arrangement of the former 06 and the odd-numbered, in particular one-time deflection of the partial webs 14; 16; 22; 23; 24, it is possible in an advantageous embodiment, the former 06 in relation to a direction transverse to the incoming part web 14; 16; 22; 23; 24 fixed execute; d. H. a lateral positioning of the former 06 is not required.

For all the above exemplary embodiments, the former 06 can advantageously have an effective width b06 of at least half the width b _{max of} the maximum web 01 to be processed. In other words, the former 06 has an effective width b06 of at least one half of a usable bale length (usable width b02) of the forme cylinder 02. Preferably, the former 06 even has an effective width b06 of at least two-thirds of the usable width b02 (ie, bale length) of the forme cylinder 02 or the maximum width b _max . Further, the former 06, however, b02 (ie barrel length) of the forme cylinder 02, or the maximum width b _max is preferably narrower than the total usable width executed. Under effective width 06 of the former 06, in this case the width of the former 06 is transverse to the inlet direction in the region of the run-up of the partial web 14; 16; 22; 23; 24 to understand.

Thus, with varying web or partial web width on the twisted on 90 ° former 06 partial webs 14; 16; 22; 23; 24 can be correctly aligned laterally, the turning bars are so horizontally or in the plane of the incoming and / or outgoing web movable, so that at tracks 01; 19 different width of the part webs 14 formed therefrom; 16; 22; 23; 24 can be aligned correctly with each other and / or the funnel tip.

The longitudinal cutting device 07 for the longitudinal section in the region of the Falzrückens can in an unillustrated embodiment of FIGS. 2 and 4 instead of behind the former 06 even before the former 06, z. B. in the region of a former 06 upstream Pull roller, be arranged.

LIST OF REFERENCE NUMBERS

01

Material web, paper web, web

02

Printing cylinder, forme cylinder, plate cylinder, transfer cylinder

03

frame

04

turning bar

05

-

06

formers

07

Slitter

08

Cylinder, Puncture and folding blade cylinder

09

Sheeter

10

-

11

Cylinder, jaw cylinder

12

folding

13

Sheeter

14

Partial track, wide

15

-

16

Partial track, narrow

17

Slitter

18

turning bar

19

web

20

-

21

Slitter

22

part web

23

part web

24

part web

25

-

26

turning bar

27

stitcher

b02

Width 02

b06

Width 06

b _max

maximum width of the track

A

field

B

field

C

field

D

field

e

field

F

field

G

field

H

field

I

field

J

field

K

field

L

field

Claims (24)

1. A printing press with at least one forme cylinder (02) for printing a web of material (01; 19) and with at least one longitudinal slitter (07; 17; 21) for cutting the web of material (01; 19) into web portions (14; 16; 22; 23; 24), wherein the forme cylinder (02) is provided with printing plates for n pages in its width, wherein n is a natural number divisible by three, and wherein n pages are smaller in width and n + 1 pages are larger in width than a width (b02) of the forme cylinder (02), and the longitudinal slitter (17; 21) is capable of being positioned on a boundary between a k-th and a k + 1-th page, wherein k is one or two thirds of n, and wherein at least one of the web portions (14; 16; 22; 23; 24) is conveyed through a former (06) by means of which a web portion (14; 16; 22; 23; 24) is capable of being folded longitudinally and the entry direction of which extends transversely to the running direction of the web in the region of the longitudinal slitter (17; 21), and the former (06) has an effective width (b06) which is larger than or equal to two thirds but smaller than the total usable width (b02) of the forme cylinder (02).
2. A printing press with at least one forme cylinder (02) for printing a web of material (01; 19) and with at least one longitudinal slitter (07; 17; 21) for cutting the web of material (01; 19) into web portions (14; 16; 22; 23; 24), wherein the forme cylinder (02) is provided with printing plates for n pages in its width, wherein n is a natural number divisible by three, and wherein n pages are smaller in width and n + 1 pages are larger in width than a width (b02) of the forme cylinder (02), and the longitudinal slitter (17; 21) is capable of being positioned on a boundary between a k-th and a k + 1-th page, wherein k is one or two thirds of n, and wherein a web portion (16) at least one third in width is conveyed in the middle to a former (06) by means of which a web portion (14; 16; 22; 23; 24) is capable of being folded longitudinally and the entry direction of which extends transversely to the running direction of the web in the region of the longitudinal slitter (17; 21) and which has at least one effective width (b06) for longitudinally folding one half of a maximum width (b_max) of a web (19) capable of being printed in the printing press.
3. A printing press according to Claim 1 or 2, characterized in that at least one further longitudinal slitter (07) is provided in an apex of the former (06) for cutting the web portion (14; 22; 23; 24) in the longitudinal direction.
4. A printing press according to any one of the preceding Claims, characterized in that at least one transverse slitter (09; 13) is provided for cutting the web portions (14; 16; 22; 23; 24) into signatures.
5. A printing press according to Claim 4, characterized in that a stitcher (27) is provided for stitching the signatures.
6. A printing press according to any one of the preceding Claims, characterized in that at least one folder (11; 12) is provided.
7. A printing press according to Claim 2, characterized in that the former (06) has a width which [is] larger than or equal to two thirds but smaller than the total width (b02) of the forme cylinder (02).
8. A printing press according to Claim 1 or 2, characterized in that the forme cylinder (02) is designed in order to print six printed pages arranged adjacent to one another, in particular newspaper pages in the broadsheet format.
9. A printing press according to Claim 1, characterized in that a web portion (16) one third in width coming from an entire web (01; 19) and the remaining web portion (14) two thirds in width are conveyed to a common former (06) for further processing.
10. A printing press according to Claim 1 or 2, characterized in that a web portion (16) one third in width is conveyed in the middle to a former (06) which has at least one width for longitudinally folding a web one half in width.
11. A printing press according to Claim 1 or 2, characterized in that in a first operating situation a web one half in width and in a second operating situation a web one third in width is conveyed in the middle to the same former (06) in a selective manner.
12. A printing press according to Claim 1 or 2, characterized in that the former (06) is arranged so as to be fixed relative to the stand with respect to a direction transverse to the entry direction.
13. A printing press according to Claim 1 or 2, characterized in that the web portions (14; 16; 22; 23; 24) formed on the longitudinal slitter are conveyed by way of turner bars (04; 18; 26) on their path to the former (06), at least one of the said turner bars (04; 18; 26) having an effective length for deflecting a web portion which corresponds to at least half of the width (b_max) of the maximum web (19) to be processed.
14. A printing press according to Claim 1 or 2, characterized in that the web portions (14; 16; 22; 23; 24) formed from the web (01; 19) on the longitudinal slitter are conveyed by way of turner bars (04; 18; 26) on their path to the former (06), at least one of the said turner bars (04; 18; 26) having an effective length for deflecting a web portion (14) which corresponds to at least two thirds of the width (b_max) of the maximum web (19) to be processed.
15. A printing press according to Claim 13 or 14, characterized in that all the turner bars (04; 18; 26) associated with the web portions (14; 16; 22; 23; 24) of the said web (01; 19) have the said effective length.
16. A printing press according to Claim 1 or 2, characterized in that the web portions (14; 16; 22; 23; 24) formed on the longitudinal slitter are conveyed by way of turner bars (04; 18; 26) on their path to the former (06), at least one of the said turner bars (04; 18; 26) being movable in such a way in the plane of the web portion (14; 16; 22; 23; 24) which runs in and/or out that for webs (01; 19) of different width the web portions (14; 16; 22; 23; 24) formed from them in each case can be orientated in their relative lateral position with respect to one another and/or with their middle relative to the tip of the former.
17. A printing press according to Claim 16, characterized in that all the turner bars (04; 18; 26) associated with the web portions (14; 16; 22; 23; 24) of the said web (01; 19) are movable in this way in the plane of the web portion (14; 16; 22; 23; 24) which runs in and/or out.
18. A printing press according to Claim 2, 9 or 11, characterized in that the web portion (16) one third in width has two vertical printed pages arranged adjacent to each other, in particular newspaper pages in the broadsheet format.
19. A printing press according to Claim 1 or 2, characterized in that the web portions (14; 16; 22; 23; 24) conveyed on the former (06) pass around an odd number of turner bars (04; 18; 26) in each case beforehand.
20. A printing press according to Claim 1 or 2, characterized in that the effective width (06) of the former (06) is the width of the former (06) transverse to the run-in direction in the region of the run-up of the web portion (14; 16; 22; 23; 24).
21. A printing press according to Claim 1 or 2, characterized in that the usable width (b02) of the forme cylinder (02) in the axial direction of the cylinder (02) corresponds to the maximum pressure and ink-transfer range.
22. A printing press according to Claim 1 or 2, characterized in that the forme cylinder (02) is provided with a set of six printing plates in its width.
23. A printing press according to Claim 1 or 2, characterized in that in an operating situation to carry out a semi-commercial printing order the forme cylinder (02) is capable of being provided with only four printing plates in its width.
24. A printing press according to Claim 1 or 2, characterized in that the forme cylinder (02) is provided or is at least capable of being provided with two sets of printing plates on its periphery.

Images