EP1718463A1

EP1718463A1 - Printing machine comprising a former

Info

Publication number: EP1718463A1
Application number: EP05701427A
Authority: EP
Inventors: Günther Oskar ECKERT
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2004-01-09
Filing date: 2005-01-04
Publication date: 2006-11-08
Anticipated expiration: 2025-01-04
Also published as: US20080156209A1; WO2005065949A1; ATE380112T1; DE102004001399A1; EP1718463B1; US7661359B2; DE502005002159D1

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

PRINTING MACHINE WITH FOLDING JUDGE

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

It is known, for example, from W. Walenski, "The web offset printing", 1996, pages 186 and 187, a folding structure of a printing press in which a material web is cut into two partial webs, the partial webs are superimposed and folded in the middle of a further production step, or In such a case, the width of the pages for four-sided webs according to Walenski, page 81, would be a quarter of the width of the printing cylinder or slightly less if a web with a smaller width than that of the printing cylinder was to be printed.

If the number of pages 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 in order to print a three, quarter, half or quarter wide web with three, two or one side next to one another. In any 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 also to be used for semi-commercial printing, tasks with unfavorable page formats can occur, where four pages are wider than the plate cylinder or where the width of the plate cylinder is poorly used with four pages next to each other, but a doubled number of pages Width of the plate cylinder exceeds. EP 0 814 044 A1 discloses a web guide of a plurality of partial webs cut lengthwise via a longitudinal cutting device to a folding former, which is oriented such that its entry direction runs transversely to the web running direction in the region of the longitudinal cutting device.

DE 20 39 844 B shows a web guide in a printing press with a longitudinal cutting device, which is positioned in such a way that it divides the web into a 1/3 and a 2/3 partial web. The two partial webs are guided on a folding former that can be moved transversely to the web running direction.

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

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

In contrast to known printing presses, in which a longitudinal division of an original material web into partial webs with one or two thirds of the original width is provided only from the beginning with three-quarter-wide material webs or web, i.e. with webs that fill a maximum of three quarters of the width of the plate cylinder, is such a printing press set up to carry out such a third division even with wider webs. In the best case, the entire width of the plate cylinder can be used to print a number of pages that can be divided by three.

At least one of the partial webs can be passed through a former. The material web is folded in the middle as it passes through the former. It is possible to provide at least one longitudinal cutting device in an apex of the former for cutting the at least one folded partial web in the longitudinal direction of its fold line. The printing press preferably has a cross cutter for cutting the partial webs into signatures.

The printing press can also be provided with a folder. The folder can be, for example, a cross folder such as a jaw cylinder or another known device for cross folding. Then the cross cutter can be, in particular, a cutting knife cylinder placed on a folding jaw cylinder of the folding apparatus.

To produce stapled products, the printing press can also have a stapling device for stapling the signatures.

Embodiments of the invention are shown in the drawings and are described in more detail below.

Show it:

Figure 1 is a schematic representation of part of a known printing press.

2 shows a schematic illustration of part of a first printing press;

3 shows a schematic illustration of part of a second printing press;

Fig. 4 is a schematic representation of part of a third printing press.

A part of a known printing press when carrying out a semi-commercial print job is shown schematically in FIG. 1. From a material web 01, in particular paper web 01 or web 01, with a width of 32 "(812.8 mm) Products with a page width of 8 "(203.2 mm) are produced with the printing machine. The material web 01 is guided over a printing cylinder 02, for example a forme cylinder 02, which is rotatably mounted in a frame 03, and which is directly a plate cylinder 02 or, in the case of indirect printing processes, can be a transfer cylinder 02 rolling in contact with a plate cylinder 02. An impression cylinder which presses the material web 01 against the printing cylinder 02 is not shown in Fig. 1. For printing on the material web 01 this is The plate cylinder 02 is equipped with two sets of printing plates, each set comprising four printing plates in width, therefore, for each full rotation of the plate cylinder 02, eight fields A; B; C; D; E; F corresponding to one printing plate are formed on the material web 01 ; G; H. The fields A; B; C; D are printed by the four printing plates of the first set, while the fields E; F; G; H by de n Printing plates of the second set are printed. In Fig. 1, the fields A; B; C; D; e; F; G; H, which are printed on the material web 01 with each revolution of the printing cylinder 02, indicated by diagonally crossed out rectangles.

The material web 01 is guided via a turning bar 04 into a folding former 06, in which it is longitudinally folded in the middle. In FIG. 1, in addition to the former 06, the effect of the former 06 on the fields A; B; C; D; e; F; G; H illustrates: A longitudinal fold is created between fields B and C and between fields G and F.

A longitudinal cutting device 07 is arranged in an apex of the former 06 in connection with the former 06. It can be switched on as required in order to separate the material web 01 at the longitudinal fold into two sub-webs of the same width one above the other. These are broken down 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 sheets comprises fields A; B; F; E, and a second of these sheets includes fields C; D; G; H. With these signatures, sheets lie one on top of the other in such a way that fields A and D, B and C, E and H, and F and G cover each, as can be seen in the small illustration next to cross cutter 09.

The signatures arrive at a cylinder 08, e.g. B. a puncture and folding knife cylinder 08, which is provided in a manner known per se with puncture bars or grippers for holding the signatures and with folding knives. From the puncture and folding knife cylinder 08, the signatures to a cylinder 11, e.g. B. Pass folding jaw cylinder 11. The signatures are folded across with a cross fold line on the first sheet between fields A and E and between B and F, and on the second sheet between fields C and G and between D and H. This is shown by the small figure next to cylinders 08; 11th

To the cylinders 08; 11 is followed by a cross cutter 13 equivalent to the cross cutter 09, which cuts the signatures along the transverse fold edges. The result is four sheets on top of each other, each with two fields. Here, too, a small figure shows the situation after passage through the cross cutter 13. The sheet shown at the top comprises the fields G and H.

Finally, there is a folder 12 in which the signatures are folded lengthways again. The longitudinal fold occurs between the respective fields of the sheets of the signature, which is also illustrated by a small figure. Products with four longitudinally folded sheets and 16 pages are thus produced with the printing machine.

As can be seen in FIG. 1, the printing press is designed for the processing of material webs wider than the present material web 01 with a width of 32 ". On both sides of the material web 01 there remains an unused projection of the printing cylinder 02 of a usable width b02 of its bale. The width or usable width b02 of the cylinder 02 is to be understood as its width, which is a maximum pressure or Wrong transfer area represents. In the case of transfer cylinders, this can be, for example, the maximum width that can be occupied by transfer fabrics and, for form cylinders, the maximum width that can be occupied by printed images. This does not include cones, any additional bearer ring width or other auxiliary devices. The usable width b02 also essentially corresponds to a maximum 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. slightly less than the width b02 of the cylinder 02 designed as a forme cylinder 02 or corresponds to this in extreme cases. If you wanted to produce a product with an 8 "page width with the printing press shown from a wider material web in order to also use this overhang, this wider material web would have to be four page 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, in order to produce a product with an 8 "page width in the printing press shown, the use of a material web 01 with a maximum web width of 32" is required, with a large projection of the printing cylinder 02 also having to be accepted on both sides of the material web 01.

A corresponding part of a printing press is shown schematically in FIG. The same reference numerals designate the same components as in Fig. 1. In contrast to Fig. 1, a wider web of material 19 with a width of 48 "(1219.2 mm) is processed in the present printing press. On the plate cylinder 02 are again two sets of printing plates arranged in the width, but the sets here comprise n = 6 printing plates per set, and the number of printing plates n of a set, that is to say 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, namely fields A; B; C ; D; E; F from the printing plates of the first set and the fields G; H; I; J; K; L from the printing plates of the second set. A longitudinal cutting device 17 is provided, which cuts the material web 19 into a wide partial web 14 and a narrow partial 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 a third of the width of the material web 19. Number the fields A printed on a set of printing plates; B; C; D; e; F; G; H; I; J; K; L in the drawing from bottom to top, then the longitudinal cutting device 17 is placed on a boundary between the second and third fields, that is to say between fields E and D of fields A printed on by the first set of printing plates; B; C; D; e; F and between fields K and J of fields G printed by the second set of printing plates; H; I; J; K; L Thus the fields belong to A; B; C; D; G; H; I; J to the wide partial web 14, while the fields E; F; K; L belong to partial web 16.

The wide partial web 14 is guided over a turning stand 04, while the narrow partial web 16 is guided over a second turning bar 18 such that both partial webs 14 and 16 pass through the former 06, in which the wide partial web 14 is centered between the fields H and I and is folded between fields B and C. Partial web 16 passes through the former 06 unchanged. Like FIG. 1, FIG. 2 is also shown with small siblings to clarify the position of fields A; B; C; D; e; F; G; H; I; J; K; L in the various processing steps. In the case of the printing press shown in FIG. 2, the folded partial web 16 surrounds the partial web 14 after passing through the folding former 06. However, it is also possible for the partial web 14 to be guided outside the folded partial web 16.

At least one of the two turning bars 04; 18 (here at least 04), but advantageously both turning bars 04; 18 has an effective length for deflecting a partial web 14 corresponding to at least two thirds of the width b _{max of} the maximum web 19 to be processed. The effective length here is the resulting length to understand which results from the projection of the incoming partial web on the 45 ° or 135 ° inclined turning bar 04; 18 results, that is, the length which is necessary for deflecting 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-third-wide partial web 14 to turning bar 04 or 18 and / or the cutting line between D and E or between B and C increases.

After passing through the folding former 06, the now-folded partial web 14 is cut lengthwise at the fold point by the slitting device 07, as in the previous example, so that, in contrast to the printing machine from FIG. 1, three partial webs lying one on top of the other with a width corresponding to two pages each 16 "(50.8 mm) are transferred to the cross cutter 09. Further processing is carried out analogously to the printing machine in FIG. 1. As a finished product, a longitudinally folded signature with six sheets and 24 pages leaves the printing machine.

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

FIG. 3 shows a second embodiment of a printing machine. The printing machine of FIG. 3 has two longitudinal cutting devices 17 and 21, which divide the material web 19 into three partial webs 22; 23; Cut 24 each of the same width. The longitudinal cutting device 17 is, as in the previous example, on the boundary between second and third fields, that is between fields E and D and between fields J and K, while the slitting device 21 is placed at a boundary between fourth and fifth fields, that is between fields B and C and between 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. The partial web 22 includes the fields A; B; G; H, the partial web 23, the fields C; D; I; J, and the sub-web 24, the fields E; F; K; L

Partial web 22 is guided over the turning bar 04, partial web 23 over a turning bar 26 and partial web 24 over the turning bar 18, all three partial webs 22; 23; 24 then pass through the former 06. In contrast to the printing machine of FIG. 2, no longitudinal cutting device is required following the former 06; the partial webs 22; 23; 24 are only folded in the center of the fold former 06 and are broken down into signatures in this folded state by the cross cutter 09 and then transferred to the puncturing and folding knife cylinder 08. Here the signature is folded over as in the examples above. The signature is then cut open in the cross cutter 13 on the cross fold. The printing machine shown in FIG. 3 delivers two longitudinally folded signatures as a finished product, each of which comprises three sheets and twelve pages.

Finally, FIG. 4 shows a modification of the printing machine from FIG. 3, in which, following the former 06, as in the examples from 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 06. This provides six partial webs lying on top of each other. A cross cutter 09 positioned against the puncture and folding knife cylinder 08 cuts the six partial webs into signatures with six sheets. A stapler 27 also positioned against the puncture and folding knife cylinder 08 staples the sheets of a signature together along a line on which the signature is folded over when it is transferred to the folding jaw cylinder 11. The finished product has six sheets and 24 pages stapled together. Both the printing machine from FIG. 3 and the printing machine from FIG. 2 process a 48 "wide material web 19 and thus have the same advantages as the printing machine from FIG. 2, namely good utilization of the printing machine and the possibility of using products to produce a larger number of sheets for a given page width of the product of 8 "than is possible with the known printing machine from FIG. 1.

In generalizing the inventive concept, a printing press with at least one forme cylinder 02 for printing on a material web 01; 19 and with at least one longitudinal cutting device 07; 17; 21 for cutting the material web 01; 19 in partial webs 14; 16; 22; 23; 24 is provided, the forme cylinder 02 being equipped with printing plates for n pages in width, where n is a natural number that can be divided into three, that n pages are smaller in width and n + 1 pages in width are larger than a width of the forme cylinder 02 , and that the longitudinal cutting device 17; 21 can be placed on a boundary between a k-th and a k + 1-th side, where k is one or two thirds of n.

In the aforementioned embodiments, the former 06 is preferably oriented such that its entry direction transverse to the web running direction in the area of the longitudinal cutting device 17; 21 runs and / or its entry direction viewed in plan view for the partial web 14; 16; 22; 23; 24 extends essentially parallel to the longitudinal axis of the forme cylinder 02. In contrast to a straight version on the former 06 along or parallel to the machine alignment M, the partial web 14; 16; 22; 23; 24 deflected from this escape by approx. 90 °. Each printed web preferably experiences 01; 19 or partial web 14; 16; 22; 23; 24 on the way from the printing unit to the former 06 only one such change in direction from the machine alignment. Simple deflections via deflection rollers with a rotation axis perpendicular to the direction of entry are excluded from this. Due to the 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 to fold the former 06 in a direction transverse to the incoming partial web 14; 16; 22; 23; 24 stationary; ie lateral positioning of the former 06 is not necessary.

For all of the above exemplary embodiments, the folding 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. The folding former 06 preferably 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 . Furthermore, the folding former 06 is preferably made narrower than the total usable width b02 (ie bale length) of the forme cylinder 02 or the maximum width b _m3X . The effective width 06 of the former 06 is the width of the former 06 transverse to the direction of entry in the region of the run-up of the partial web 14; 16; 22; 23; 24 to understand.

So that with varying web or partial web width, the partial webs 14; 16; 22; 23; 24 can be correctly aligned laterally, the turning bars can be moved horizontally or in the plane of the incoming and / or outgoing web, so that webs 01; 19 of different widths the partial webs 14; 16; 22; 23; 24 can be correctly aligned with each other and / or the funnel tip.

The longitudinal cutting device 07 for the longitudinal cut in the area of the fold back can, in the embodiment not shown in FIGS. 2 and 4, instead of behind the former 06 also in front of the former 06, e.g. B. upstream of the former 06 Pull roller, be arranged.

LIST OF REFERENCE NUMBERS

01 material web, paper web, web

02 impression cylinder, plate cylinder, plate cylinder, transfer cylinder

03 frame

04 turning bar

05 -

06 former

07 Longitudinal cutting device 8 cylinders, puncture and folding knife cylinders 9 cross cutters

10 -

11 cylinders, jaw cylinder

12 folder

13 cross cutters

14 partial web, wide 5 - 6 partial web, narrow 7 longitudinal cutting device 8 turning bar 9 material web 0 - 1 longitudinal cutting device 2 partial web 3 partial web 4 partial web 5 - 6 turning bar 7 stapler b02 width 02 b06 width 06 b _max maximum width of the web

A field

B field

C field

D field

E field

F field

G field

H field

1 field

J field

K field

L field

Claims

Expectations

Printing machine with at least one forme cylinder (02) for printing on a material web (01; 19) and with at least one longitudinal cutting device (07; 17; 21) for cutting the material web (01; 19) into partial webs (14; 16; 22; 23; 24 ), the forme cylinder (02) being equipped with printing plates for n pages in width, where n is a natural number divisible by three, and where n pages are smaller in width and n + 1 pages in width are larger than a width (b02) of the forme cylinder (02), and the longitudinal cutting device (17; 21) can be placed on a boundary between a kth and a k + 1th side, where k is one or two thirds of n, and at least one the partial webs (14; 16; 22; 23; 24) are guided through a folding former (06), the entry direction of which runs transversely to the web running direction in the region of the longitudinal cutting device (17; 21), and the folding former (06) has an effective width (b06) which is greater than or equal to two thirds is smaller than the total usable width (b02) of the forme cylinder (02).

Printing machine with at least one forme cylinder (02) for printing on a material web (01; 19) and with at least one longitudinal cutting device (07; 17; 21) for cutting the material web (01; 19) into partial webs (14; 16; 22; 23; 24 ), the forme cylinder (02) being equipped with printing plates for n pages in width, where n is a natural number divisible by three, and where n pages are smaller in width and n + 1 pages in width are larger than a width (b02) of the forme cylinder (02), and the longitudinal cutting device (17; 21) can be placed on a boundary between a k-th and a k + 1-th side, where k is one or two thirds of n, and at least one third-wide partial web (16) is guided in the middle of a folding former (06), the entry direction of which runs transversely to the web running direction in the region of the longitudinal cutting device (17; 21), and which has at least one effective width (b06) for longitudinally folding half of a maximum width (b _max ) has a web (19) which can be printed on in the printing press.

3. Printing machine according to claim 1 or 2, characterized in that at least one further longitudinal cutting device (07) is provided in a vertex of the former (06) for cutting the partial web (14; 22; 23; 24) in the longitudinal direction.

4. Printing machine according to one of the preceding claims, characterized in that at least one cross cutter (09; 13) for cutting the partial webs (14; 16; 22; 23; 24) is provided in signatures.

5. Printing machine according to claim 4, characterized in that a stapling device (27) is provided for stapling the signatures.

6. Printing machine according to one of the preceding claims, characterized in that at least one folder (11; 12) is provided.

7. Printing machine according to claim 2, characterized in that the folding former (06) has a width which is greater than or equal to two thirds but less than the entire width of the forme cylinder (02).

8. Printing machine according to claim 1 or 2, characterized in that the forme cylinder (02) is designed for printing six print pages arranged side by side, in particular newspaper pages in broadsheet format.

9. Printing machine according to claim 1, characterized in that a third-wide partial web (16) emerging from an entire web (01; 19) and the remaining two-third wide partial web (14) are guided for further processing onto a common former (06).

10. Printing machine according to claim 1 or 2, characterized in that a third wide partial web (16) is guided centrally on a former (06) which has at least one width for longitudinally folding a half-wide web.

11. Printing machine according to claim 1 or 2, characterized in that optionally in a first operating situation, a half-wide web and in a second operating situation, a third-wide web is guided in the middle of the same former (06).

12. Printing machine according to claim 1 or 2, characterized in that the folding former (06) is arranged fixed to the frame with respect to a direction transverse to the direction of entry.

13. Printing machine according to claim 1 or 2, characterized in that the partial webs (14; 16; 22; 23; 24) formed on the longitudinal cutting device are guided on their way to the former (06) via turning bars (04; 18; 26), at least one of which has an effective length for deflecting a partial web corresponding to at least half the width (b _max ) of the maximum web (19) to be processed.

14. Printing machine according to claim 1 or 2, characterized in that the partial webs (14; 16; 22; 23; 24) formed on the longitudinal cutting device from the web (01; 19) on their way to the former (06) via turning bars (04 ; 18; 26), at least one of which has an effective length for deflecting a partial web (14) corresponding to at least two thirds of the width (b _max ) of the maximum web (19) to be processed.

15. Printing machine according to claim 13 or 14, characterized in that all of the partial webs (14; 16; 22; 23; 24) assigned to this web (01; 19) Turning rods (04; 18; 26) have this effective length.

16. A printing machine according to claim 1 or 2, characterized in that the partial webs (14; 16; 22; 23; 24) formed on the longitudinal cutting device are guided on their way to the former (06) via turning bars (04; 18; 26). At least one of which can be moved in the plane of the incoming and / or outgoing partial web (14; 16; 22; 23; 24) in such a way that for webs (01; 19) of different widths the respective partial webs (14; 16; 22; 23; 24) in their relative lateral position to each other and / or with their center relative to the former tip of the former can be aligned.

17. Printing machine according to claim 16, characterized in that all the turning bars (04; 18; 26) assigned to the partial webs (14; 16; 22; 23; 24) of this web (01; 19) are arranged in the plane of the single and / or outgoing partial web (14; 16; 22; 23; 24) are movable.

18. Printing machine according to claim 2, 9 or 11, characterized in that the third-wide partial web (16) has two standing print pages arranged next to one another, in particular newspaper pages in broadsheet format.

19. Printing machine according to claim 1 or 2, characterized in that the partial webs (14; 16; 22; 23; 24) guided on the former (06) previously each have an odd number of turning bars (04; 18; 26).

20. Printing machine according to claim 1 or 2, characterized in that the effective width (06) of the former (06) the width of the former (06) transversely to the inlet direction in the region of the run-up of the partial web (14; 16; 22; 23; 24 ) is.

21. Printing machine 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 printing or ink transfer area.