EP0919373A1 - Rotary press and method for simultaneously printing two webs - Google Patents

Abstract

The machine has at least one rubber/rubber printing mechanism (2a-2c) to which the first and second strips (10,18) are fed in succession in a first mode for printing on one side of the first strip and a second side of the second strip. A third strip is delivered in a third mode for printing on both sides. Further printing mechanisms (20,22) print further colors on the first side of the second strip and the second side of the first strip in the first mode. Feed devices feed the first strip around the first further printing mechanism and the second strip around the second further mechanism. An Independent claim is also included for a method of simultaneous printing on two strips.

Description

The present invention relates to a web-fed rotary printing press and a method for simultaneous printing on two webs in a web-fed rotary printing press. in the In particular, the present invention relates to a web-fed rotary printing press Printing a multicolor image on first and second webs in a first Mode of operation and to print a multicolored image on both sides of a third Single track in a second operating mode.

From the M600, M1000 and M3000 series presses, by the applicant are manufactured and distributed, the printing of a single paper web is known both sides with a respective multicolored image, e.g. a four-color image. The Multi-color images are common on both sides of the single web used "rubber / rubber" printing units, through which the web passed becomes.

A disadvantage of the printing machines described above is that they do not allow two paper webs at the same time with a multicolored image on one side and to print a monochrome image on the other side of the web like this is often desired for printing, especially when printing newspapers. Therefore enable the described machines, although they have a high print quality and a comparatively high speed when printing multicolored images on both Provide single web pages, no printing demanding jobs, at a multicolored image on one side and one at an increased speed monochrome image is printed on the other side of a web.

After outlining the state of the art and the associated disadvantages, is accordingly an object of the present invention, a Roll rotary press to provide multi-color printing Images on both sides of a single paper web and alternatively printing on two Allows paper webs with a multi-colored image on one side.

According to a first embodiment of the invention, a web-fed rotary printing press comprises preferably a web-fed rotary offset printing machine for newspaper printing, for simultaneous printing of a first and a second web in a first operating mode and for alternatively printing a third single web in a second operating mode at least one rubber / rubber printing unit, which the first and the second web arranged on top of each other to be fed on a respective first side of the first Web and a respective second side of the second web in the first operating mode to be printed on, and alternatively the in the second mode on both sides printing third single web is fed. The printing press also includes a first further printing unit and a second further printing unit as well as the first Guide devices for guiding the first web around the first further printing unit and second guide devices for guiding the second path around the second further Printing unit in the first operating mode.

According to one embodiment of the invention, there are at least two more Rubber / rubber printing units are provided, each of the rubber / rubber printing units being one different image with one of the colors yellow, magenta, cyan and black on each of the respective first and second sides of the machined webs in the first and second Operating mode.

According to a further embodiment of the invention, the first and the second carry further Print a single color image on each side of a web, preferably a black one Image on the respective first and second side of the second web and the respective first and second side of the first web in the first mode.

According to a further exemplary embodiment of the invention, the first and the second are Printing unit Impression units for printing different or changing images on the respective sides of the first and / or second web.

According to a further embodiment of the invention, third guide devices, preferably rollers of a known type, in front of the first rubber / rubber printing unit arranged, which have two incoming tracks, around the first and the second track to be arranged one on top of the other before they are laid on top of each other Rubber / rubber printing unit are fed.

According to a further embodiment of the invention, the first and the second web can have a different width.

In another embodiment of the invention, the rubber / rubber printing units are and the first and second further printing units arranged so that the first and the second or alternatively the third path is in a substantially vertical direction move, although it is also possible to arrange the printing units so that the webs move in a substantially horizontal direction.

According to a further embodiment of the invention, a method for simultaneous Printing a first and a second web in a web-fed rotary printing press, preferably a web-fed offset printing press for printing newspapers, the following steps: arranging the first and the second web on top of one another, feeding the with their unprinted pages one on top of the other to form a rubber / rubber printing unit for printing a first color image on a first side of the first web and a second color image on a second side of the second web, separating the first and the second web and printing a third image on the second side of the first web and a fourth picture on the first page of the second web. In this version of the Invention, the third and fourth images are preferably in first and second printed printing unit arranged behind the rubber / rubber printing unit, the first Web around the first further printing unit and the second web around the second further Printing unit to be led around.

An advantage of the present invention is that it can print a so-called 4/4 print jobs in one mode and alternatively in one The process of printing a so-called 4/1 or a so-called 1/4 print job at twice the page production speed in another operating mode enables.

Another advantage of the present invention is that the implementation of Invention only minor modifications to known web-fed rotary printing presses requires, e.g. Web offset printing presses for applying a color image a running paper web that has more than three rubber / rubber printing units.

The present invention is more preferred in the following description Embodiments in connection with the accompanying, listed below Drawings explained in more detail.

Fig. 1

eine schematische Ansicht einer erfindungsgemäßen Rollenrotations-Offsetdruckmaschine mit drei Gummi/Gummi-Druckwerken und zwei zusätzlichen Druckwerken beim Drucken eines 4/1 -Druckauftrags auf zwei unterschiedlichen Bahnen in einer ersten Betriebsart;

Fig. 2

eine Darstellung der Druckmaschine der Fig. 1 beim Drucken eines 4/4-Druckauftrags mit einer zusätzlichen Schmuck- oder Hausfarbe auf eine Einzelbahn in einer zweiten Betriebsart;

Fig. 3

eine weitere Ausführung einer Rollenrotationsdruckmaschine gemäß vorliegender Erfindung.

Show it:

Fig. 1

a schematic view of a web-fed rotary offset printing machine according to the invention with three rubber / rubber printing units and two additional printing units when printing a 4/1 print job on two different webs in a first operating mode;

Fig. 2

an illustration of the printing machine of Figure 1 when printing a 4/4 print job with an additional decorative or house color on a single web in a second mode.

Fig. 3

a further embodiment of a web-fed rotary printing press according to the present invention.

As shown in Fig. 1, a web-fed rotary printing press comprises, in particular, one Web offset printing press for printing newspapers, a variety of known rubber / rubber printing units 2a, 2b, 2c, each having a first Blanket cylinder 4a, 4b, 4c and an associated first plate cylinder 6a, 6b, 6c for Printing a first multicolor image on a first page 8a of a first web 10 exhibit.

The printing press 1 further comprises second blanket cylinders 12a, 12b, 12c and associated second plate cylinder 14a, 14b, 14c for printing a respective second one multicolored image on a second side 16b of a second web 18. As from Fig. 1 and 2 can be seen, in the direction of movement of the first and second tracks 10, 18 seen, a first further printing unit 20 behind the rubber / rubber printing unit 2d and a second further printing unit 22 behind the first further printing unit 20 arranged.

In a first operating mode, which is shown in Fig. 1 and in which the first and the second Lane 10, 18 simultaneously with preferably three different colors on the respective one first side 8a of the first web 10 and the respective second side 16b of the second Web 18 are printed by the rubber / rubber printing units 2a, 2b, 2c, the first Web 10 from the first guide devices 24 around the first further printing unit 20 guided and is on its first and / or second side 8b in the second further Printing unit 22 printed. Accordingly, the second web 18 is printed on it first and / or second page 16a, 16b directly through the first further printing unit 20 guided and then by the second guide devices 26 by the second further Printing unit 22 performed, as indicated in Fig. 1.

In the preferred embodiment of the invention, the first and / or the second are further Printing unit 20, 22 preferably known rubber / rubber printing units. In case of first operating mode, in which the first and the second web 10, 18 with their unprinted Pages or z. B. in a dryer previously dried pages lying one on top of the other Rubber / rubber printing units 2 and then the first and second others Printing units 20, 22 are supplied, both webs 10, 16 simultaneously with one four-color image on one side and a single-color image on the second side printed, as indicated by the wedges shown in Fig. 1, each having a specific Display color that is printed on the webs.

According to another embodiment of the invention are in front of the rubber / rubber printing units 2a, 2b, 2c third guide or deflection devices 28 for deflecting and Guide the incoming first and second tracks 10, 18 in such a way that these with their unprinted pages lying on top of each other the rubber / rubber printing units 2a, 2b, 2c are supplied, as shown in Fig. 1.

The first, second and third guide devices 24, 26, 28 shown in the drawings are indicated schematically, preferably rollers or turning bars are known The way they are usually used in conventional web-fed rotary printing machines a running paper web, although the invention is not on rollers or turning bars is limited.

In a second mode of operation shown in Fig. 2, a single third Paper web 30 directly through the preferably three rubber / rubber printing units 2a, 2b, 2c led to on their first side 32a and their second side 32b with a respective multicolored image to be printed, preferably three of the four colors cyan, Contains magenta, yellow and black. After passing the last rubber / rubber printing unit 2c, the third single track 30 is directly downstream of the first Printing unit 20 fed to on its first and its second side 32a, 32b with a additional color, preferably a fourth color from the group of cyan colors, Magenta, yellow and black to be printed on, and then becomes the second one Printing units 22 supplied, if desired with an additional color or Spot color to be printed on their first and / or second side 32a, 32b.

Although in the preferred embodiment of the invention the first and / or second further printing units 20, 22 conventional rubber / rubber printing units for printing of images on both sides of a web, the first and / or second could be further Printing units 20, 22 also conventional printing units for printing on only one side of the Be a train. In this embodiment of the invention, which is shown in Fig. 3, a fifth color, e.g. a spot color, on the first side 8a of the first web 10 and / or on the second side 16b of the second web 18 by a printing unit 2d in the first Mode, and a sixth color, e.g. another second Spot color or varnish or the like on the respective first and / or second side 32a, 32b of the third single web 30 in the second operating mode by the same printing unit 2d be applied.

Although the first web 10 and the second web 18 are preferably of the same width , it is also possible that the first web 10 has a smaller width than the second Has web 18 or that the second web 18 is narrower than the first web 10.

In addition, the arrangement of the rubber / rubber printing units 2a, 2b, 2c and first and second further printing units 20, 22 not to that shown in FIGS. 1 and 2 Limited arrangement in which the first and second tracks 10, 18 and the third Single web 32 is essentially horizontal through the printing units 2a, 2b, 2c, 20, 22nd move. In the same way, it is also possible for the printing units 2a, 2b, 2c and 20, 22 to do so to arrange that webs 10, 18 and 32 are substantially in one (not shown) vertical direction.

According to an embodiment of the invention, the first and / or second further printing units 20, 22 as printing units of known type for printing alternating Images on the first side 16a of the second web 18 and / or the second side 8b of the first Track 10 can be executed in the first mode. Such impressions are from the Known in the art and are therefore not described further.

According to a further exemplary embodiment of the invention, a method for simultaneous printing of a first and a second web 10, 18 in one Web-fed rotary printing press 1, preferably a web-fed rotary offset printing machine To print newspapers, follow these steps: arrange the first and second Lanes 10, 18 on top of each other, feeding the lanes 10, 18 lying on top of each other at least one, but preferably three rubber / rubber printing units 2a, 2b, 2c for printing a first multicolored image on a first side 8a of the first web 10 and to Printing a second color image on the second side 16b of the second web 18; Separating the first and second webs 10, 18 from each other; and printing a third Image on the second side 8b of the first web 10 and a fourth image on the first Page 16a of the second spell 18. In this embodiment of the invention, the third and the fourth image preferably in a first and a second further Printing unit 20, 22 printed, which, seen in the web running direction, behind the Rubber / rubber printing units 2a, 2b, 2d are arranged, the first web 10 around the first further printing unit 20 and the second web 18 around the second further printing unit 22 is led around.

According to a further embodiment, which is not shown in the drawings, can the direction of movement of the tracks 10 and 18 in Fig. 1 can be changed in such a way that in the first mode of operation the first web 10, the printing unit 22 and the second Web 18 is fed to the printing unit 20, in each case on one or both sides to be printed, and that the webs 10 and 18 are then arranged one on top of the other and the printing units 2c, 2b, 2a are fed to in the manner described above to be printed with a multicolored image.

LIST OF REFERENCES

1

Web rotary printing machine

2a

Rubber / rubber printing unit

2 B

Rubber / rubber printing unit

2c

Rubber / rubber printing unit

2d

Rubber / rubber printing unit (Fig. 3)

4a

first blanket cylinder

4b

first blanket cylinder

4c

first blanket cylinder

4d

first blanket cylinder (Fig. 3)

6a

first plate cylinder

6b

first plate cylinder

6c

first plate cylinder

6d

first plate cylinder (Fig. 3)

8a

first page of the first web

8b

second side of the first web

10th

first lane

12a

second blanket cylinder

12b

second blanket cylinder

12c

second blanket cylinder

12d

second blanket cylinder (Fig. 3)

14a

second plate cylinder

14b

second plate cylinder

14c

second plate cylinder

14d

second plate cylinder (Fig. 3)

16a

first side of the second web

16b

second side of the second web

18th

second lane

20th

first further printing unit

22

second additional printing unit

24th

first management facilities

26

second management facilities

28

third management organizations

30th

third single track

32a

first page of the third single track

32b

second side of the third single track

Claims (12)

Web-fed rotary printing machine (1) for simultaneous printing on a first and second web (10, 18) in a first operating mode and alternatively for printing on a third single web (30) in a second operating mode, which comprises the following features: At least one rubber / rubber printing unit (2a-2d), to which the first and second webs (10, 18) are fed one on top of the other in the first operating mode, so as to be on a respective first side (8a) of the first web and a respective second side (16b) the second web to be printed, and to which the third web (30) is fed in the second mode of operation to be printed on both sides (32a, 32b); a first further printing unit (20) for printing a further color on the first side (16a) of the second web (18) in the first operating mode; a second further printing unit (22) for printing a further color on the second side (8b) of the first web (10) in the first operating mode; first guide devices (24) for guiding the first web (10) around the first further printing unit (20); and second guide devices (26) for guiding the second web (18) around the second further printing unit (22) in the first operating mode. Device according to claim 1,
characterized, that the first and second further printing unit (20, 22), seen in the web running direction, are arranged behind the rubber / rubber printing unit (2a-2d). Device according to claim 2,
characterized, that two further rubber / rubber printing units, seen in the direction of web travel, are arranged in front of the rubber / rubber printing unit (2a-2d) and each of these rubber / rubber printing units has a different image with one of the colors yellow, magenta and cyan on each of the applies respective first and second sides of the webs in the first and second operating modes. Device according to claim 3,
characterized, that the first further printing unit (20) applies a monochrome image to the first and second side (16a, 16b) of the second web (18) in the first operating mode. Device according to claim 4,
characterized, that the second web (18) is printed on its second side (16b) with a multicolor image which contains one of the colors cyan, magenta, yellow or black, and is printed on its first side (16a) with a black image. Device according to claim 3,
characterized, that the second further printing unit (22) applies a monochrome image to the first and second side (8a, 8b) of the first web (10) in the first operating mode. Apparatus according to claim 6,
characterized, that the first web (10) is printed on its first side (a) with a multicolor image containing one of the colors cyan, magenta or black, and on its second side (8b) is printed with a black image. Device according to one of the preceding claims,
characterized, that the first and / or second further printing unit (20, 22) is an impression unit. Device according to one of the preceding claims,
characterized, that third guide means (28) are provided which, as seen in the web running direction, are provided in front of the rubber / rubber printing unit (2a-2d) in order to arrange the first and second webs (10, 18) on top of one another in the first operating mode before these are fed to the rubber / rubber printing unit (2a-2d). Device according to one of the preceding claims,
characterized, that the second side (8b) of the first web (10) and the second side (16b) of the second web (18) are unprinted in the first operating mode before being fed to the rubber / rubber printing unit (2a-2d). Process for simultaneous printing of a first and a second web in a web-fed rotary printing press comprising the following steps: Arranging the first and second webs one on top of the other, feeding them onto one another arranged first and second web to a rubber / rubber printing unit for Printing a first color image on a first side of the first web and one second colored image on a second side of the second web, separating the first and second web from each other, and printing a third image on a second Side of the first panel and a fourth image on a first side of the second Train. A method according to claim 11,
characterized, that the third and fourth images are printed in a first and second further printing unit which is arranged downstream of the rubber / rubber printing unit, the first web being guided around the first further printing unit and the second web being guided around the second further printing unit.

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