EP1358072B1 - Web-fed rotary press - Google Patents

Abstract

A web-fed rotary printing press is used for printing a web and consists of at least two satellite cylinders and of at least six cylinders, each of which defines a printing location in cooperation with the satellite cylinders. Each printing location can be brought into a printing-on or a printing-off position. The six or more printing locations can be positioned to all print the same side of the web. At least five of the printing locations, that can be positioned on the same side of the web, are arranged in direct succession along the path of travel of the web.

Description

The invention relates to a web-fed rotary printing press according to the preamble of claim 1.

By the EP 0 710 558 B1 a web-fed rotary printing machine in satellite construction according to the preamble of claim 1 is known, wherein both sides of a paper web in each case pass through 8 pressure points, the web thus passes through 16 pressure points. The two printing towers are successively passed through by the web in each case in 4/4-paper guide and are each for the purpose Imprinterfunkionalität as a printing tower as a whole on or off.

The DE 43 03 904 C2 shows arrangements of two superimposed printing units, wherein the two printing units continuous paper web is printed on both sides with at most four colors.

By the EP 0 947 318 A1 a rotary printing press is known, wherein in one embodiment, a satellite printing unit with eight printing units may be formed in order to make a re-imaging of four plate cylinders during printing can.

The invention has for its object to provide a web-fed rotary printing press, wherein the print quality is improved when changing from one mode of operation of the Imprinterbetriebes in the other.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that the two for the purpose of Imprinterbetrieb or flying pressure plate change (hereinafter referred to as "Imprinterbetrieb") against each other interchangeable pressure points are not too far apart and the free length of the paper web between the two printing units is kept small. For example, in the case of a printing tower in satellite construction, the two mutually interchangeable pressure points within a arranged eight pressure points printing tower.
It is advantageous that a long paper path between the two exchangeable pressure points, z. B. from one printing tower to another, is avoided, which generally improves the Passerhaltigkeit or Farbregisterhaltigkeit between two pressure points. In contrast to an alternating switching on and off of an entire printing tower, more uniform conditions are created on the machining path. For example, as uniform as possible dampening of the paper web is achieved with the web-fed rotary printing press according to the invention. It is avoided that, for example, in the first mode of operation of a so-called. 4/4 + 4/4 paper guide, a first printing tower wets the paper web and completely 4/4 printed (while the second printing tower is turned off), and in a second mode only the second Printing tower the paper web 4/4 printed and this results in significant differences in the running distance of the moistened paper web between the two modes of operation. This is achieved, for example, by an 8/0 + 0/8 paper guide, wherein the perfecting and the perfecting each have their own printing tower is associated with complete Imprinterfunktionalität. Both the employees, as well as the corresponding parked printing unit are arranged in a common printing tower.

In each mode of operation of the Imprinterbetriebes is advantageously at least one pressure point in each printing tower in print-on position.

In addition to the dampening by means of dampening also other effects, such. Example, the presence of clamping points, pressure-related transverse and / or longitudinal expansion, of influence by the application of color, or other voltage and transport influencing parameters uniformly.

It is particularly advantageous for all modes of operation in the imprinter mode via the paper path as uniform as possible conditions, and therefore also as equal as possible Tension conditions are produced in the paper web.

Both the arrangement of the printing dots of the same color printing close to each other, as well as the increased distance between the first and the last simultaneously printing printing location for both modes of operation, improve the print quality when changing from one mode to another.

Furthermore, it is advantageous that at least 6 consecutive pressure points of a paper page have the same direction of rotation. For example, eight consecutive pressure points of a printing tower have the same direction of rotation, so that, for example, this paper page can be printed in four colors within the one printing tower in the imprinter mode.

Advantageous in terms of loss of quality as well as a reduction in the deposition of fresh paint and the associated washing costs are paper paths in which the fresh pressure of a maximum of only four satellite or counter-pressure cylinders "overrun" is.

In an advantageous embodiment of the web-fed rotary printing press in satellite construction z. B. the good Passerhaltigkeit two consecutive pressure points due to the short distance.

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

Fig. 1

ein erstes Ausführungsbeispiel für vollständige Imprinterfunktionalität im Vierfarbendruck;

Fig. 2

ein zweites Ausführungsbeispiel für vollständige Imprinterfunktionalität im Vierfarbendruck;

Fig. 3

ein drittes Ausführungsbeispiel für vollständige Imprinterfunktionalität im Vierfarbendruck;

Show it:

Fig. 1

a first embodiment of full Imprinterfunktionalität in four-color printing;

Fig. 2

a second embodiment for complete Imprinterfunktionalität in four-color printing;

Fig. 3

a third embodiment for complete Imprinterfunktionalität in four-color printing;

A printing press, in particular a web-fed rotary printing press, has a first unit 01, e.g. B. a first printing tower 01, and another unit 02, z. B. a second printing tower 02. The first printing tower 01 has at least six, in the example eight printing points D1; D2; D3; D4; D5; D6; D7; D8, which by eight cylinder 03, z. B. eight transfer cylinder 03, and with these in a print-on position via a retracted web 04, z. As a substrate, in particular a paper web 04, cooperating satellite cylinder 06, z. B. steel cylinder 06, are formed. If the web-fed rotary printing machine is designed for n-color printing, the unit 01 has 2 × n (2 × n) printing dots D1; D2; D3; D4; D5; D6; D7; D8 for full imprinter functionality. For n-color printing on one side of the paper web 04 with an imprinter functionality of m colors (m≤n), the unit 01 has n + m pressure points. For example ( Fig. 1 ) for the at least one-sided four-color printing with full Imprinterfunktionalität act two adjacent transfer cylinder 03; with one of the four steel cylinders 06 together and form a total of eight pressure points D1; D2; D3; D4; D5; D6; D7; D8. This may, for example, be a pair of stacked ten-cylinder satellite units. However, four upper and / or four lower transfer cylinders 03 may each cooperate with a single satellite cylinder 06 as so-called. Nine-cylinder satellite units which are stacked, for example.

The transfer cylinder 03 are on the respective satellite cylinder 06 optionally on and off, and cooperate with cylinders, not shown, which in turn with also not shown inking, and if necessary, with Dampening, work together. For Imprinterbetrieb at least this form cylinder from the transfer cylinder 03 is abgestellt and with, at least to the satellite cylinder 06, different speed operated so that he braked, for example, for the purpose of changing the printing plate or the print image independently of the satellite cylinder 06, stopped, possibly with the reverse direction or other speed can be operated. During the change of the printing form or the printed image (eg imaging), the satellite cylinder 06 and possibly the transfer cylinder 03 can continue to be operated at production speed.

The first printing tower 01 is along the path of the paper web 04, the second, at least one, but preferably four or eight more pressure points D9; D10, D11; D12; D13; D14; D15; D16 having second unit 02, z. B. the second printing tower 02, upstream or downstream. As for the first printing tower 01, also has the second printing tower 02 cylinder 07, z. B. transfer cylinder 07, which to satellite cylinder 08, z. B. to steel cylinder 08, are adjustable.

The paper web 04 runs in the first printing tower 01 so through the eight pressure points D1; D2; D3; D4; D5; D6; D7; D8 that they the satellite cylinder 06 with respect to a transport direction T of the paper web 04 with the same direction of rotation, in the example right R, d. H. clockwise, loop around. All satellite cylinder 06 rotate in this direction of rotation, the paper web 04 is only from the transfer cylinders 03 facing side, theoretically eight times, printable.

However, the paper web 04 is in this first printing tower 01 only on this one side and only four times by four of the eight pressure points D1; D2; D3; D4; D5; D6; D7; D8 printed with four colors, while the remaining four pressure points D5; D6; D7; D8; D1; D2; D3; D4 "flying", ie during production, can be converted. The nonprinting pressure points D5; D6; D7; D8; D1; D2; D3; D4 have the same four colors as the printing ones.

In the first embodiment ( Fig. 1 ) are located in print on and in print-off position (dashed and offset from the satellite cylinder shown), associated pressure points D1; D2; D3; D4; D5; D6; D7; D8 of the same color each adjacent to each other and with the same satellite cylinder 06 together acting arranged.

For example, the two pressure points D1 below; D3 with magenta M, the two pressure points D2 on the lower right; D4 with Cyan C, the two upper left adjacent D5; D7 with yellow Y and the two adjacent top right with black B equipped.

The two pressure points D1; D2; D3; D4; D5; D6; D7; D8 of the same color can optionally be adjusted to the associated satellite cylinder 06 so that, for example, the transfer cylinders 03 facing side of the paper web 04 by means of salaried printing units D1, D4, D5 and D8 is printed in four colors, while the printing units D2, D3, D6 and D7 off , and thus can be converted, and vice versa (in the figure indicated by double arrow).

The arrangement of pairs of pressure points D1; D2; D3; D4; D5; D6; D7; D8 of the same color is also possible in any other desired order within the first printing tower 01. A distance between the mutually engageable pressure points D1; D2; D3; D4; D5; D6; D7; D8 of the same color is to a minimum, z. B. smaller 1 m, which minimizes any occurring moisture problems when switching from one mode of operation to another result.

After the one-sided printing of the paper web in the first printing tower 01, the paper web 04 passes through the second unit 02. The second unit 02 has one or more, as required, for. B. at least four, in the example eight pressure points D9; D10; D11; D12; D13; D14; D15; D16, wherein the paper web 04 the pressure points D9; D10; D11; D12; D13; D14; D15; D16 passes through such that the not yet printed side of the paper web 04 can be printed by the transfer cylinder 07. For this purpose, rotate the satellite cylinder 08 formed as a second printing tower 02 unit 02 all in the same direction, z. B. in the direction of rotation left L.

In the example, the color assignment is mirrored as in the printing tower 01, but at the vertical. The transfer cylinders 07 are each again in pairs for the purpose Imprinterfunktionalität on the associated satellite cylinder 08 on or off.

The paper web 04 is thus printed in the first printing tower 01 and the second printing tower 02 each one-sided four-color with full Imprinterfunktionalität. The route length for the dampening of the paper web 04, here between printing unit D4 and D7 and between D2 and D5 is not or only slightly changed in relation to the distance from the first printing unit D4 to the last printing unit D15 when switched from one mode of operation to the other becomes. The distance between the first and last in print-on-position printing unit, z. B: D4 to D15 or D2 to D13, is greater than half of the distance from the first to the last of the paper web 04 associated printing unit D1 to D16 in both modes.

In particular, the location of the moistening in the course of the printing press is only insignificantly changed, which results in a more uniform web tension before and after the switching. The dangers of web break between the units 01 and 02 when switching and increased control effort can thus be reduced.

Also in the second embodiment ( Fig. 2 ) The paper web 04 rotates the satellite cylinder 06 of the first printing tower 01 in the same direction, z. B. right R, and is unilaterally through all eight pressure points D1; D2; D3; D4; D5; D6; D7; D8 printable. The same applies to the guidance of the paper web 04 (but left L) and the pressure points D9; D10; D11; D12; D13; D14; D15; D16 in the second pressure tower 02.

The two mutually on or Abstellbaren pressure points D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 of the same color per printing tower 01; 02 are not immediately adjacent to the same satellite cylinder 06; 08 acting together, but within the respective printing tower 01; 02 arranged diagonally mirrored (in Fig. 2 indicated by dashed arrow in unit 01). In the example, the printing locations D1 and D8 in the first printing tower 01 and the printing locations D10 and D15 in the second printing tower 02 have the color yellow Y, the printing locations D2 and D7 in the first printing tower 01 and the printing locations D9 and D16 in the second printing tower 02 the color magenta M. , the printing locations D3 and D6 in the first printing tower 01 and the printing sites D12 and D13 in the second printing tower 02 the color black B, and the printing sites D4 and D5 in the first printing tower 01 and the printing sites D11 and D14 in the second printing tower 02 the color cyan C on ,

Advantageously, a mode of operation, wherein in a state in each case the below arranged four pressure points D1, D2, D3, D4, D9, D10, D11, D12 are in pressure-on position, while the upper pressure points D5, D6, D7, D8 , D13, D14, D15, D16 are accessible for retrofitting and vice versa. Thus, each to be retrofitted printing units D5, D6, D7, D8, D13, D14, D15, D16 and D1, D2, D3, D4, D9, D10, D11, D12 are almost on a plane or on an operating level of the printing press.

The welchselseitig with the same side of the paper web 04 acting printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 of a color are each within a unit 01; 02. The maximum distance between these two printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 is therefore less than half the length of the paper web 04 from the first to the last printing point D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16. Also the distribution of dampening is for both modes of operation more uniform than when the paper web 04 is printed once only by means of one unit 01 and the other times only by means of the other unit in 4/4 operation. The distance between the first and last employed printing unit, z. B. D4 and D12 or D5 and D13, in both modes of Imprinterbetriebs greater than half the distance between the first and last printing unit D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16, eg D4 and D13.

It is advantageous that in both modes 01 in each unit; 02 always at least one of the printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 is employed, and thus moistens the paper web 04.

In the third embodiment ( Fig. 3 ) the paper web 04 orbits the satellite cylinders 06; 08 of the first printing tower 01 and the second printing tower 02 also each in the same direction, z. B. right R in the first printing tower 01 and left L in the second printing tower 02nd

The two mutually on or Abstellbaren pressure points D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 of the same color per printing tower 01; 02 are within the respective printing tower 01; 02 arranged mirrored at the vertical. In the example, the printing locations D1 and D2 in the first printing tower 01 and the printing locations D9 and D10 in the second printing tower 02 the color magenta M, the printing locations D3 and D4 in the first printing tower 01 and the printing sites D11 and D12 in the second printing tower 02 the color cyan C. , the pressure points D5 and D6 in the first printing tower 01 and the pressure points D13 and D14 in the second printing tower 02, the color yellow Y, and the pressure points D7 and D8 in the first printing tower 01 and the pressure points D15 and D16 in the second printing tower 02, the color black B on ,

Advantageously, a mode of operation, wherein in one state each within the respective printing tower 01; 02 diagonally opposite pressure points D2, D4, D5, D7, D9, D11, D14, D16 are in the pressure on position, while the others are diagonal opposite pressure points D1, D3, D6, D8, D10, D12, D13, D15 are accessible for retooling and vice versa. The respectively to be converted printing units D1, D3, D6, D8, D10, D12, D13, D15 and D2, D4, D5, D7, D9, D11, D14, D16 are not directly adjacent to in-process printing units D2, D4, D5, D7, D9, D11, D14, D16 and D1, D3, D6, D8, D10, D12, D13, D15, respectively, which places less demands on safety precautions.

The mutually with one side of the paper web 04 cooperating printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 of a color are again each within a unit 01; 02. Again, the maximum distance between these two printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 is less than half the length of the paper web 04 from the first to the last printing location D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16. The local distribution of dampening is uniform for both modes of operation. Again, the distance between the first and last employed printing unit, z. B. D4 and D16 or D1 and D13, in both modes of Imprinterbetriebs greater than half the distance between the first and last printing unit D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16, z. Eg D4 and D13.

It is advantageous that in both modes 01 in each unit; 02 always at least one of the printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 is employed, and thus moistens the paper web 04.

If a production deviating from the two-sided four-color printing with full imprinter functionality is desired, other configurations for the first unit 01 and the second unit 02 are also conceivable: If, for example, only one side of the paper web 04 meets this requirement, but only one on the other side Full-color printing without imprinter functionality or full-color two-color printing Imprinterfunktionalität, so the second unit 02 to four pressure points D9; D10; D11; D12 be reduced, or the other pressure points D13; D14; D15; D16 of a second unit 02 designed as a printing tower 02 can cooperate with a second, not shown, paper web from a third printing tower, likewise not shown, corresponding to the first printing tower 01.

It is also possible to have at least one of the units 01; 02 for more than four colors, z. B. for n = 6 colors with z. B. two-color Imprinterfähigkeit (m = 2) on one side of the paper web 04 set so that this unit 01; 02 has eight pressure points, which are all traversed by the web 04 in the same direction of rotation. The same is due to the requirement of less than four colors, e.g. B. three colors with six pressure points D1; D2; D3; D4; D5; Use D6 with full imprinter functionality.

However, it is advantageous for each configuration when the two corresponding or mutually engageable for one side of the paper web 04 printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 have a distance which is small, in particular smaller than half the distance of the paper path between the first and the last with the paper web 04 cooperating printing unit D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 is. The area of dampening, d. H. the length of the paper web 04 between the first and last employee pressure point D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; In contrast, D16 must be greater than half of the o.g. in each of the two operating situations. Be track.

Are the printing units D1; D2; D3; D4; D5; D6; D7; D8; D9; D10; D11; D12; D13; D14; D15; D16 for the two sides of the web 04 in two different, z. B. structurally separate units 01; 02 arranged, must in each of the two operating situations in each unit 01; 02 at least one printing unit D1; D2; D3; D4; D5; D6; D7; D8 or D9; D10; D11; D12; D13; D14; D15; D16 be employed. It is advantageous for this case if the perfecting and the perfecting each have their own unit 01; 02 is assigned, wherein the leadership of the paper web 04 each within the unit 01; 02 in the same direction around the satellite cylinder 06; 08 runs.

It is also advantageous if first all n (n = 3, 4, 5, 6), in the examples four colors C; B; M; Y on one side of the web 04 are applied before the other side is printed.

In a further development of the invention (not shown) can also several, in pairs the same color B; C; M; Y comprising printing units in bridge construction (rubber-rubber operation) be arranged, for example, four such, on the same side of the paper web 04 printing printing units are designed with two colors. These printing units of the same color are advantageously arranged adjacent to each other in the running direction of the paper web. It is advantageous that here as well, since printing and non-printing printing units in the direction of the web 04 is not completely separated from each other spatially, but z. B. are arranged alternately, a homogenization of the conditions when changing between one and the other mode of operation in Imprinterbetrieb.

The mentioned exemplary embodiments are equally applicable to an imprinter operation, whereby no alternate printing in the sense of a flying disk change (eg for the printing of different regional parts of a newspaper, etc.), but an impression of an additional print image (additional text, spot color) should take place. In this case, for example, only temporarily to be activated printing unit near the printing on the same page printing units, in particular advantageously directly adjacent to arrange. In order to even out the conditions on the web 04, it is advantageous for one side of the web 04 when using a plurality of such imprints to arrange these not together before the first or behind the last "normal" printing unit.

LIST OF REFERENCE NUMBERS

01

Unit, first, printing tower

02

Unit, second, printing tower

03

Cylinder, transfer cylinder

04

Railway, paper web

05

-

06

Satellite cylinder, steel cylinder

07

Cylinder, transfer cylinder

08

Satellite cylinder, steel cylinder

D1

Pressure point (01)

D2

Pressure point (01)

D3

Pressure point (01)

D4

Pressure point (01)

D5

Pressure point (01)

D6

Pressure point (01)

D7

Pressure point (01)

D8

Pressure point (01)

D9

Pressure point (02)

D10

Pressure point (02)

D11

Pressure point (02)

D12

Pressure point (02)

D13

Pressure point (02)

D14

Pressure point (02)

D15

Pressure point (02)

D16

Pressure point (02)

B

black

C

cyan

M

magenta

Y

yellow

L

Counterclockwise

R

Clockwise

T

Transport direction (04)

Claims (13)

1. A web-fed rotary printing press for printing a web (04), which has at least two satellite cylinders (06; 08) and at least six cylinders (03; 07) forming one printing point (D1 to D16) in each case with the satellite cylinders (06; 08), wherein at least two of the printing points (D1 to D16) are capable of being set on in an alternate manner, by means of which the same ink (B; C; M; Y) is capable of being applied to the same side of the web (04) in a respective impression throw-on, characterized in that a distance between the first and the last printing point (D4 and D15; D2 and D13) present at the same time in the impression throw-on along the path of the web (04) is greater than half a length of the path of the web (04) between the first and the last printing point (D4, D13) associated with the web (04) (Fig. 1).
2. A rotary printing press according to Claim 1, characterized in that the two printing points (D1 to D16) applying the same ink (B; C; M; Y) to the same side of the web (04) in the impression throw-on are arranged in a first unit (01).
3. A rotary printing press according to Claim 1, characterized in that the two printing points (D1 to D16) applying the same ink (B; C; M; Y) to the same side of the web (04) in the impression throw-on are arranged in a first printing tower (01).
4. A rotary printing press according to Claim 1, characterized in that the first and the last printing point (D1 to D16) present at the same time in the impression throw-on are arranged along the path of the web (04) in two different units (01; 02) through which the web (04) passes.
5. A rotary printing press according to Claim 1, characterized in that the first and the last printing point (D1 to D16) present at the same time in the impression throw-on are arranged along the path of the web (04) in two different printing towers (01; 02) through which the web (04) passes.
6. A rotary printing press according to Claim 3, characterized in that six printing points (D1 to D16) applying to the same side of the web (04) in the impression throw-on are arranged in the first printing tower (01).
7. A rotary printing press according to Claim 6, characterized in that at least five of the six printing points (D1 to D16) applying to the same side of the web (04) in the impression throw-on are arranged in a direct sequence on the path of the web (04).
8. A web-fed rotary printing press according to Claim 5, characterized in that the first printing tower (01) comprising the first printing point (D1 to D8) present in the impression throw-on has at least six and the second printing tower (02) comprising the second printing point (D9 to D16) present in the impression throw-on has at least four printing points (D9 to D16).
9. A rotary printing press according to Claim 1, characterized in that in two printing towers (01; 02) separate from each other it has at least four printing points (D1 to D16) associated with the same web (04) in one imprinter operation, wherein at least two of the printing points (D1 to D16), by means of which the same ink (B; C; M; Y) is capable of being applied to the same side of the web (04) in an impression throw-on, are capable of being set on in an alternate manner for the purpose of an imprinter operation, and in each of the two modes of operation of the imprinter operation at least one of the printing points (D1 to D16) of each printing tower (01; 02) is in the impression throw-on.
10. A web-fed rotary printing press according to Claim 1 or 9, characterized in that the maximum distance between the two printing couples (D1 to D16) applying the same ink (B; C; M; Y) to the same side of the web (04) in the impression throw-on amounts to less than half the length of the web (04) from the first to the last printing point (D1 to D16) associated with the web (04).
11. A web-fed rotary printing press according to Claim 5, characterized in that by means of the printing points (D9 to D16) of the second unit (02; 01) associated with the path of the web (04) ink (B; C; M; Y) is capable of being applied to the side of the web (04) which is opposite the side printed in the first unit.
12. A web-fed rotary printing press according to Claim 3 or 9, characterized in that the satellite cylinders (06; 08) of a printing tower (01; 02) all have the same direction of rotation (L; R).
13. A web-fed rotary printing press according to Claim 2, characterized in that in a first mode of operation one half of the printing points (D1 to D16) of the unit (01; 02) and in a second mode of operation the other half of the printing points (D16 to D1) are in the impression throw-on.

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