In-register arrangement of printing plates on printing-press cylinders with a temperature-control system

Patent metadata

Field	Value
Publication number	US-9387665-B2
Application number	US-201314420994-A
Country	US
Kind code	B2
Filing date	Apr 25, 2013
Priority date	Aug 16, 2012
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

The in-register arrangement of at least two printing plates on at least two plate cylinders of a printing press, with respect to each other, is accomplished. Settings for a temperature of a printing plate, which is arranged on one of the plate cylinders or of a cylinder barrel of the plate cylinder or of a temperature control assembly, which interacts with the printing plate or the at least one printing cylinder, are determined depending on a printing image which is printed onto a printing material. One temperature of the printing plate or of the cylinder barrel or of the temperature control assembly is changed according to the settings in such a way that subsequently, an image form element, which is arranged on the printing plate, and an image form element, which is arranged on another of the printing plates, are situated in a predefined relative position with respect to one another, at least in an axial direction relating to a plate cylinder. The printing press has a press unit which has a transfer cylinder which is in contact with a plurality of plate cylinders and to a system for register regulation.

First claim

What is claimed is:

1. A method for accomplishing an in-register arrangement of at least two printing plates positioned on at least two plate cylinders of a printing press to each other, the printing press having at least one printing unit and at least one transfer cylinder forming a print gap in a contact area of the at least one transfer cylinder with a further cylinder, the at least one transfer cylinder being in contact with a plurality of plate cylinders of the printing unit wherein, depending on at least one print image printed on a print substrate by the printing press, adjustments for at least one of a temperature of at least one printing plate arranged on at least one of the at least two plate cylinders, at least one cylinder barrel of at least one plate cylinder of the at least two plate cylinders of the printing press and at least one temperature control means interacting with this at least one printing plate and this at least one plate cylinder are determined, and the at least one of the one temperature of this at least one printing plate and of this at least one cylinder barrel and of this at least one temperature control means is changed in accordance with the adjustments, and where the at least one plate cylinder has at least one channel having at least one tensioning device, the at least one tensioning device including at least one front clamping device for clamping a front end of a respective printing plate and including at least one rear clamping device for clamping a rear end of this respective printing plate and wherein at least one register pattern of the print substrate is recorded and, depending on the at least one register pattern, determining adjustments for at least one adjusting element of the at least one tensioning device, the at least one adjusting element of the at least one tensioning device including at least one of a front contact body for adjusting a distance of the at least one front clamping device from a first channel wall of the at least one channel, at least one rear spacer for adjusting a distance of the at least one rear clamping device from a second channel wall of the at least one channel and at least one axial drive for adjusting a position of the at least one rear clamping device with respect to an axial direction which is parallel to an axis of rotation of the at least one plate cylinder.

2. The method according to claim 1 , further including changing the at least one of the temperature of the at least one printing plate and of the at least one cylinder barrel and of the at least one temperature control means according to the adjustments and thereafter locating at least one image form element arranged on the at least one printing plate of the at least two printing plates and at least one image form element arranged on another printing plate of the at least two printing plates in specified relative positions to one another at least with respect to the axial direction of the at least one plate cylinder.

3. The method according to claim 2 , further including specifying the relative position of the at least one printing plate and of the another printing plate of the at least two printing plates to one another based at least on one of the axial direction independently of a recording of the at least one print image applied to the print substrate and that this relative position of the at least one printing plate and the another printing plate to one another, at least with regard to the axial direction, is already specified before a recording of the at least one print image applied to the print substrate.

4. The method according to claim 2 , further including finding the at least one image form element arranged on the at least one printing plate and the at least one image form element arranged on the another of the at least two printing plates in the specified relative position to one another after the one of the change of the at least one temperature of this at least one printing plate and of this at least one cylinder barrel and of this at least one temperature control means at least with respect to the axial direction relative to the at least one plate cylinder.

5. The method according to claim 1 , further including recording, in an inspection process, the at least one print image printed on the print substrate and in dependence thereon determining, in an evaluation process, adjustments for the at least one of the at least one temperature of the at least one printing plate arranged on the at least one plate cylinder and for the at least one cylinder barrel of the at least one plate cylinder and for the at least one temperature control means interacting with this printing plate and for this at least one plate cylinder and changing, in an adjustment process, the at least one of the temperature of this at least one printing plate and of this at least one cylinder barrel and of this at least one temperature control means in accordance with the adjustments.

6. The method according to claim 5 , further including maintaining in the adaptation process, a tension within the at least one printing plate unchanged with respect to a circumferential direction of the at least one plate cylinder.

7. The method according to claim 1 , further including printing on the print substrate at least one print image, which has at least two reference elements which originate from different printing plates and recording, in an inspection process, actual positions of all reference elements of the at least one print image.

8. The method according to claim 1 , further including, in at least one sample printing operation, printing one of at least two print images on the print substrate, which at least two print images each contain at least two reference elements originating from at least two different printing plates and in the at least one sample printing operation printing at least two register patterns on the print substrate, which two register patterns are each composed of at least two reference elements originating from at least two different printing plates.

9. The method according to claim 1 , further including recording in an inspection process and processing in an evaluation process at least one of at least two print images spaced from one another transverse to a transport direction of the print substrate and parts of at least one print image and at least two print images and parts of at least of one print image spaced from one another along the transport direction and parts at least of one print image.

10. The method according to claim 1 , further including recording in an inspection process and processing in an evaluation process at least one of at least two register patterns spaced from one another transverse to a transport direction of the print substrate and at least two register patterns spaced from one another along the transport direction.

11. The method according to claim 1 , further including equilibrating least one of at least a temperature of at least a further printing plate and at least a temperature of at least a cylinder barrel of a further plate cylinder and at least a temperature of at least a temperature control means of another plate cylinder and an ambient temperature of the printing press and a temperature of the print substrate in the determining of the adjustments for the at least one of the temperature of the at least one printing plate and of the at least one cylinder barrel and of the at least one temperature control means.

12. The method according to claim 1 , further including at least one of recording at least two print images and parts of print images, which have at least one reference element originating from an identical printing plate and at least two regi

Assignees

• Koenig & Bauer Ag
• Koenig & Bauer Ag

Inventors

• Schwitzky Volkmar Rolf

Classifications

• B41F13/16

  with means for displacing the printing formes on the cylinders · CPC title

• B41P2213/91

  for sheet printing presses · CPC title

• B41F13/22

  Means for cooling or heating forme or impression cylinders · CPC title

• B41F33/0009

  Central control units · CPC title

• B41F27/005 Primary

  Attaching and registering printing formes to supports · CPC title