DE19812226A1 - Illustration process for printing form cylinder - Google Patents

Abstract

The illustration process involves using a second printing form cylinder (10) complete with inking apparatus for the offset cylinder (9) and the illustration device (14). Eccentric bearings (15, 16) and individual drives (19) enable the printing form cylinders to be moved to alternative settings with working and drive connection between the offset cylinder and the first printing form cylinder (4), or between the offset cylinder and the second printing form cylinder, or with working connection between the two printing form cylinders and the illustration device.

Description

The invention relates to a method and a device for imaging Druckformzylin other.

They are printing machines with an illustration assigned to the printing form cylinder direction known (US 5469787).

The printing press includes a sheet feeder and a sheet discharge device, one Printing cylinder and at least one of an offset cylinder and the printing form cylinder existing cylinder group, the printing form cylinder except the imaging device an inking unit is assigned.

The disadvantage here is that no imaging in the printing mode and none in the imaging mode Printing is possible and a large number of unproductive times arise.

The object of the invention is to provide a method and a device for taking pictures a printing plate cylinder during printing.

According to the invention the object is solved by the claims.

The invention is described in more detail below using an exemplary embodiment.

The drawing shows a printing press with an imaging device.

The four-color version of the printing press contains a printing cylinder 1 with i = 3 printing surfaces 2.1 ; 2.2 ; 2.3 and i = 3 gripper rows 3.1 ; 3.2 and 3.3 . The printing cylinder 1 is upstream of a sheet to be printed from a feeder sheet stack 5 to the printing cylinder 1, a pre-gripper system 6 . The supply of the sheets to the impression cylinder 1 it follows such that only one sheet is fed to every second gripper row 3 of the impression cylinder.

The printing cylinder 1 is designed as a delivery chain circuit 7 sheet discharge assigned, which takes over the printed sheet from the printing cylinder 1 and transported to the delivery sheet stack 8 . Here, too, an arc is removed only from every second gripper row 3 of the printing cylinder 1 .

Furthermore, the cylinder 1 two cylinder groups 11 ; 17 assigned. Each analog cylinder group contains one offset cylinder 9 with i minus 1, which is operatively connected to the printing cylinder 1 , ie two active surfaces and two printing form cylinders 4 , which are operatively connected to the offset cylinder 9 ; 10 with i minus 1, ie two effective areas.

Each printing form cylinder 4 ; 10 is an inking unit, each with two inking rollers 12 ; 13 ; 20 ; 21 and the printing form cylinders 4 ; 10 is associated with an imaging device 14 . Each printing form cylinder 4 ; 10 is each with its own drive 18 ; 19 equipped and in eccentric bearings 15 ; 16 stored.

As an alternative to this (variant solution not shown), the printing form cylinders 4 ; 10 stationary and each with its own drive 18 ; 19 equipped and the offset cylinder 9 in pel eccentric bearings.

The method according to the invention is described with reference to the representation of the printing press with the first cylinder group 11 ; the second cylinder group 17 is integrated into the printing process analogously to the first cylinder group 11 .

The first printing form cylinder 4 is in operative connection with the offset cylinder 9 and in active connection with the assigned inking rollers 20 ; 21 (solid representation). This enables printing to be carried out. The imaging device 14 is not in operative connection with the first printing form cylinder 4th

The second printing form cylinder 10 is by means of the eccentric bearing 16 out of operative connection with the offset cylinder 8 and out of operative connection with the inking rollers 12 ; 13 has been brought (dashed line).

Out of operative connection means besides the production of a distance between offset cylinder 9 and printing form cylinder 10 and between printing form cylinder 10 and inking rollers 12 ; 13 also that the second printing form cylinder 10 with its drive wheel, not shown, is not incorporated in the drive wheel train and is thus separated from the drive of the printing press. This takes place either with the drive wheel firmly connected to the printing form cylinder by swiveling it out by means of the eccentric bearing from the drive wheel train or by releasing the drive wheel via a coupling from the printing form cylinder.

In the alternative variant, the operative connection is established between offset cylinder 9 and printing form cylinders 4 ; 10 or moving out of working connection by turning the double eccentric of the offset cylinder. The printing plate cylinders are inserted and removed from the gear train by releasing the printing plate cylinder drive wheel via an axially acting phase coupling.

After the second printing forme cylinder has been brought out of operative connection, this can be driven for imaging - the operative connection between the imaging device 14 and two tem printing form cylinder 10 has been established - by means of the self-propulsion 19 with imaging speed, ie an imaging of the second printing form cylinder 10 is during printing operation possible with the first printing form cylinder 4 . After completion of the printing process with the first printing form cylinder 4 , this is brought out of operative connection and newly illustrated, and the now illustrated second printing form cylinder 10 is brought into active connection with the offset cylinder 9 .

Reference list

1

Impression cylinder

2nd

Printing area

2.1

first printing area

2.2

second printing area

2.3

third printing area

3rd

Row of grippers

3.1

first row of grabs

3.2

second row of grabs

3.3

third row of grabs

4th

first printing form cylinder

5

Stack of feeder sheets

6

Forerunner system

7

Delivery chain circle

8th

Delivery sheet stack

9

Offset cylinder

10th

second printing form cylinder

11

first cylinder group

12th

first inking roller

13

second inking roller

14

Imaging device

15

first eccentric bearing

16

second eccentric bearing

17th

second cylinder group

18th

first self-propulsion

19th

second self-propulsion

20th

third inking roller

21

fourth inking roller

Claims (6)

1.Method for imaging a printing form cylinder of a printing press with a printing cylinder and at least one cylinder group, consisting of an offset cylinder and a first printing form cylinder, an imaging device assigned to the first printing form cylinder, an inking unit assigned to the first printing form cylinder, and a sheet feed and sheet discharge device, the cylinders including Inking unit are connected by a drive wheel train, characterized in that

• - The offset cylinder ( 9 ) and the imaging device ( 14 ) assigned a second Druckformzy cylinder ( 10 ) including inking unit ( 12 ; 13 ),
• - The first printing form cylinder ( 4 ) for printing is brought into active connection with the offset cylinder ( 9 ) and out of active connection with the imaging device ( 14 ),
• - The second printing form cylinder ( 10 ) for imaging in operative connection with the imaging device ( 14 ) and out of operative connection with the offset cylinder ( 9 ) brought,
• - The drive of the second printing form cylinder ( 10 ) is released from the drive wheel train,
• - The second printing form cylinder ( 10 ) driven by a self-drive ( 19 ) in the imaging operation at imaging speed,
• - The drive of the second printing form cylinder ( 10 ) after the imaging for printing in an operating phase position is incorporated in the drive wheel train and
• - The active connection of the first printing form cylinder ( 10 ) for imaging with the offset cylinder ( 9 ) is canceled and the active connection with the Bebilderungseinrich device ( 14 ) is established.

2.Method for imaging a printing form cylinder of a printing press with a printing cylinder and at least one cylinder group, consisting of an offset cylinder and a first printing form cylinder, an imaging device assigned to the first printing form cylinder, an inking unit assigned to the first printing form cylinder and a sheet feed and sheet discharge device, the cylinders including Inking unit are connected by a drive wheel train, characterized in that

• - The offset cylinder ( 9 ) and the imaging device ( 14 ) assigned a second Druckformzy cylinder ( 10 ) including inking unit ( 12 ; 13 ),
• - The offset cylinder ( 9 ) for printing in operative connection with the first printing form cylinder ( 4 ) and the imaging device ( 14 ) brought out of operative connection with the first printing form cylinder ( 4 ),
• - The imaging device ( 14 ) for imaging brought into active connection with the second printing form cylinder ( 10 ) and the offset cylinder ( 9 ) out of active connection with the second printing form cylinder ( 10 ),
• - The drive of the second printing form cylinder ( 10 ) is released from the drive wheel train,
• - The second printing form cylinder ( 10 ) is driven by an internal drive ( 19 ) in the imaging operation at imaging speed,
• - The drive of the second printing form cylinder ( 10 ) after the imaging for printing in an operating phase position is incorporated in the drive wheel train and
• - The operative connection of the offset cylinder ( 9 ) for imaging with the first printing form cylinder ( 10 ) is canceled and the operative connection of the first printing form cylinder ( 10 ) with the imaging device ( 14 ) is established.

3. A method for imaging a printing form cylinder according to claim 1 or 2, characterized in that the drive of the printing form cylinder ( 4 ; 10 ) by rotating eccentric bearings ( 15 ; 16 ) of the printing form cylinder from the drive wheel train. 4. A method for imaging a printing form cylinder according to claim 1 or 2, characterized in that the release of the drive of the printing form cylinder ( 4 ; 10 ) from the drive gear train by loosening a rotatably arranged on the axis of the same printing form cylinder drive wheel via an axially acting phase clutch. 5. Printing machine with a printing cylinder and at least one cylinder group, consisting of an offset cylinder and a first printing form cylinder, an imaging device assigned to the first printing form cylinder, an inking unit assigned to the first printing form cylinder with inking rollers and a sheet supply and sheet discharge device, the cylinders including inking unit are connected by a drive wheel train, characterized in that the offset cylinder ( 9 ) and the imaging device ( 14 ) are assigned a second printing plate cylinder ( 10 ) including inking unit ( 12 ; 13 ), the printing plate cylinders ( 4 ; 10 ) for alternative manufacture and lifting an active and drive connection between the offset cylinder and the first printing forme cylinder or offset cylinder and the second printing forme cylinder and for alternatively establishing and breaking an active connection between the printing forme cylinders ( 4 ; 10 ) and the imaging device ( 14 ) in eccentric storage ( 15 ; 16 ) stored and connected to each one of its own drives ( 19 ). 6. Printing machine with a printing cylinder and at least one cylinder group, consisting of an offset cylinder and a first printing form cylinder, an imaging device assigned to the first printing form cylinder, an inking unit assigned to the first printing form cylinder with inking rollers, and a sheet supply and sheet discharge device, the cylinders including inking unit are connected by a drive wheel train, characterized in that the offset cylinder ( 9 ) and the imaging device ( 14 ) are assigned a second printing form cylinder ( 10 ) including inking unit ( 12 ; 13 ), the offset cylinder ( 9 ) for alternative production and removal of an operative connection stored between the offset cylinder and the first printing form cylinder or offset cylinder and the second printing form cylinder in double eccentric bearings, the printing form cylinder each with its own drive ( 19 ) and the imaging device ( 14 ) for alternative production and cancellation ner operative connection between the printing form cylinders ( 4 ; 10 ) and the imaging device ( 14 ).